Category: PU Technology

PU Technology

HDI trimer HT-100 WanHua

HDI trimer HT-100 WanHua

Application:

WANNATE® HT-100 is a solvent free aliphatic polyisocyanate based on

hexamethylene diisocyanate (HDI), colorless to slightly yellowish clear liquid.

Equivalent weight

approx. 193

Density at 25 ℃

approx. 1.16 g/ml

Flash point

approx. 158 ℃

WANNATE® HT-100 can be used as the hardener component for lightfast

two-component polyurethane coatings with high resistance to chemicals and weathering, very good gloss retention and outstanding mechanical properties.

Preferred co-reactants are polyacrylates or polyester polyols.

The main applications for coatings based on WANNATE® HT-100 are

automotive OEM, automotive refinishing, transportation, industrial finishing and plastics.

Specification:

Properties

Specification

NCO Content

21.8 ±0.3%

Viscosity at 25 °C

2500 ±750 mPa·s

Color value (Hazen)

≤ 40

Monomeric HDI

≤ 0.20%

Package(s):

20 Kg Metal drum

220 Kg Metal drum

Storage / Solubility:

Storage in original container. Protect from moisture, heat and foreign material.

WANNATE® HT-100 is sensitive to moisture. Storage at higher temperatures will result in increasing of color and viscosity. Recommended storage temperature is -20 ~40 °C.

WANNATE® HT-100 can be thinned with esters, ketones and aromatic hydrocarbons such as ethyl acetate, butyl acetate, methoxypropylacetate, acetone,methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, solvent naphtha 100 and mixtures thereof. Generally speaking, it has good compatibility with the solvents listed. However, the solutions formed must be tested for their storage stability. Only PU grade solvents should be used (max.0.05%water, absence of reactive groups such as hydroxyl or amino groups). Aliphatic hydrocarbons are unsuitable as solvents.

WANNATE® HT-100 is not recommended to thin to a lower solid content.

Prolonged storage of a solution with a lower content may result in turbidity and sedimentation, even condensation.

Compatibility:

WANNATE® HT-100 can be mixed with the following products: aliphatic polyisocyanates, polyester polyols, aromatic polyisocyanates and polyacrylates.

Shelf Life:

It can be stored at least for 9 months at room temperature if stored properly.

 

Safety Hazards identification:

May cause sensitization by skin contact. Contains isocyanates. See information supplied by the manufacturer.

The product is used mainly as a hardener in coating materials or adhesives. The handling of coating materials or adhesives containing reactive polyisocyanates and residual monomeric HDI requires appropriate protective measures referred to in the safety data sheet.These products may therefore be used only in industrial or trade

applications. They are not suitable for use in homeworker (DIY) applications.

The safety data sheet should be observed. This contains information on labeling,transport and storage as well as on handing, productsafety and ecology.

Packaging:

Please fasten the packaging cover as soon as possible after original packaging to prevent the mixing of other substances suchas moisture and other substances that may affect the performance of the product. Do not inhale dust, avoid skin and mucous membrane contact. Smoking, eating and drinking are prohibited in the workplace. After work, shower and change clothes. Store contaminated clothes separately and reuse them after washing. Maintain good hygiene practices.

E_mail us : [email protected]

Covestro Desmodur N3300 HDI trimer curing agent Standard light-resistant PU curing agent

Type Fat Family Polyisocyanate(HDItrimer)
Form of Supply None Solvent
Purpose in Used as a curing agent component in lightfast polyurethane coating systems

 

Product Specifications

Features Value Measurement unit Method
NCOcontent 21.8 ± 0.3 % DIN EN ISO 11909
00 mPa·s DIN EN ISO 3219/A.3
equivalent about 193
density,20°C about 1.16 g/ml DIN EN ISO 2811
Flashpoint about 158 °C DIN 22 719

*The values ​​above are general information and are not part of the product specification.

 

Solubility/ Dilution
Desmodur® N3300 can use esters, ketones, aromatic hydrocarbons Solvents such as: ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, 100# solvent naphtha and their mixtures, etc. dilution. Generally, it has good miscibility with the above solvents. However, the storage stability of the prepared solution must be tested. Polyurethane grade solvents should be used (less than 0.05 % water, no reactive groups such as hydroxyl or amino groups). Aliphatic hydrocarbons are not suitable as solvents. Desmodur® N3300 should not be diluted below 40% solids. Solutions with low binder content may develop turbidity and precipitation after long-term storage.

 

compatibility
Desmodur® N3300 can generally be used with the following products. Namely: Desmodur® N100, N75, N3200, N3400, N3600 and Desmodur® Z4470 type aliphatic polyisocyanate; Desmodur® L, HL and IL type aromatic polyisocyanate; Desmophen® 670 type polyester polyol; Desmophen® A type polyisocyanate Acrylate. However, the compatibility of the prepared solutions must be tested. Desmodur® N3300 is not compatible with branched polyester polyols such as Desmophen® 651 or polyether polyols such as Desmophen® 1380 BT.

 

Features/Applications
Desmodur® N3300 is mainly used as a lightfast two-component polyurethane coating Curing agent, the prepared coating has strong chemical and weather resistance, excellent gloss retention and excellent mechanical properties. The best co-reactants are polyacrylates or polyester polyols The main areas of application for self-drying and force-drying coating systems based on Desmodur® N3300 are automotive original equipment (OEM), car refinishing, transport, industrial goods and plastics of finishing.

 

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Desmodur® N3300 is moisture sensitive and should therefore be stored in airtight in original container. When stored under proper conditions at room temperature, this product has a shelf life of at least 6 months.

 

Safety: Hazard Identification
May cause an allergic reaction by skin contact. The inclusion of isocyanates must strictly adhere to the safety data sheet. It includes relevant information such as labeling, transportation and storage, as well as relevant information on product use, product safety and ecology.

yle=”font-family:Arial,Helvetica,sans-serif”> Compatibility
Desmodur® N3300 can generally be used with the following products. Namely: Desmodur® N100, N75, N3200, N3400, N3600 and Desmodur® Z4470 type aliphatic polyisocyanate; Desmodur® L, HL and IL type aromatic polyisocyanate; Desmophen® 670 type polyester polyol; Desmophen® A type polyisocyanate Acrylate. However, the compatibility of the prepared solutions must be tested. Desmodur® N3300 is not compatible with branched polyester polyols such as Desmophen® 651 or polyether polyols such as Desmophen® 1380 BT.

 

Features/Applications
Desmodur® N3300 is mainly used as a lightfast two-component polyurethane coating Curing agent, the prepared coating has strong chemical and weather resistance, excellent gloss retention and excellent mechanical properties. The best co-reactants are polyacrylates or polyester polyols The main areas of application for self-drying and force-drying coating systems based on Desmodur® N3300 are automotive original equipment (OEM), car refinishing, transport, industrial goods and plastics of finishing.

 

Save
Desmodur® N3300 is moisture sensitive and should therefore be stored in airtight in original container. When stored under proper conditions at room temperature, this product has a shelf life of at least 6 months.

 

Safety: Hazard Identification
May cause an allergic reaction by skin contact. The inclusion of isocyanates must strictly adhere to the safety data sheet. It includes relevant information such as labeling, transportation and storage, as well as relevant information on product use, product safety and ecology.

Covestro Bayhydur XP 2547 Hydrophilic HDI polyisocyanate Low viscosity High chemical resistance

Type Based on Hydrophilic aliphatic polyisocyanate of hexamethylene diisocyanate (HDI)
Form of Supply Solvent free
Purpose As Hardener component of waterborne two-component paints and sealers for inorganic substrates and reactive resin (epoxy, polyurethane) surfaces; also as an additive to enhance the performance of waterborne paint systems.

 

Product Specifications

Features Value Measurement unit Method
Hazencolor value ≤ 150 DIN EN 1557
Viscosity,23°Cabout1.15 g/ml DIN EN ISO 2811
Flashpoint about185 °C DIN EN 22 719

*The above values ​​are general information.

 

Solubility/Dilution
Generally, this product has good compatibility with organic solvents such as esters, ether esters, xylene and solvent naphtha 100. But solubility and compatibility must be tested each time. Polyurethane grade solvents (less than 0.05% water) should be used.

 

Features/Applications
Since Bayhydur® XP 2547 is hydrophilic, it is easy to emulsify in the water phase and is mainly used as a cross-linking agent for water-based hydroxyl polyol binders (Bayhydrol®). Bayhydur® XP 2547 can also be added to traditional hydroxyl-free dispersions to improve their various properties.

 

Save
This product is moisture sensitive. When stored properly in airtight containers at not exceeding 30°C, this product has a shelf life of at least 6 months. Viscosity may increase slightly over time.

 

Security: Hazard Identification
Contains isocyanates, which may cause allergic reactions by skin contact. The Product Safety Data Sheet (492659) should be strictly followed. It includes relevant information such as labeling, transportation and storage, as well as relevant information on product use, product safety and ecology.

HDI trimer Vencorex HDT-90

HDI trimer Vencorex HDT-90

 

Description：

Aliphatic polyisocyanate based on Hexamethylene Diisocyanate trimer (HDI homopolymer), supplied at 90 % solids in a blend of butyl acetate and aromatic hydrocarbon (1 for 1 in weight).

Suggested Uses：

High solids two-component polyurethane coatings and varnishes.

Exterior protective coatings for automotive OEM, car repair, industrial machinery, plastic parts …..etc.

Specifications：

Colour

40 HAZEN (APHA)

Viscosity at 25°C

500±100 mPa.s

NCO (on delivery form)

19.8±0.7 %

Solids content

90.0±1.0 %

Hexamethylene diisocyanate monomer (HDI)

< 0.2 %

The analytical methods are available upon request

Physical Properties：

Appearance Clear

liquid

Bulk density at 25°C

1120 kg/m3 approx.

Weight per US gallon

9.35 lbs approx.

Flash point (closed cup)

53°C approx.

Equivalent weight (on delivery form)

212 g approx.

Solubility：

Soluble in esters, ketones, aromatic hydrocarbons. In most cases, esters/aromatic hydrocarbon mixtures are used.

It is recommended to use “urethane grade” solvents for the dilution (with water content below 300 ppm).

Applications:

Tolonate™ HDT 90 is typically used as a crosslinker of hydroxylatedpolymers,especially polyesters and polyacrylic polyols, to prepare two-component polyurethanes coatings showing excellent outdoor durability and mechanical properties in conjunction with outstanding resistance to solvents, abrasion and chemicals.

Packaging and transport:

Packaging (please contact our sales team for more details)

US and Thailand origin: 225 kg net metallic drums

France origin: deliveries of 900 kg net weight pallets (4 drums of 225 kg net weight).

Other packaging: upon request

Transport

Regulated. For more precise details, please refer to the safety datasheet

Storage conditions and shelf-life：

Tolonate™ HDT 90 is sensitive to moisture and should be kept in its original container or in a volume tank under dry nitrogen blanketing, for example.

Appropriate storage for 2 years does not normally affect the product in any way if it is stored in its sealed original drums in proper storage conditions at temperatures below 40°C.

 

Flammability and safety instructions：

Before handling this product please refer to its safety data sheet

E_mail us : [email protected]

HDI trimer Covesro N3390

HDI trimer Covesro N3390

ABOUT:

 

Characterization

Aliphatic polyisocyanate (HDI trimer).

As the hardener component for lightfast polyurethane coating systems

Form supplied

approx. 90 % in n-butyl acetate

 

Specification:

Property

Value

Unit of measurement

Method

NCO content

19.6 ± 0.3

%

M105-ISO 11909

Non-volatile content

(2.2 g / 120 min / 100 °C)

90 ± 1

%

M020-ISO 3251

Viscosity at 23 °C

500 ± 150

mPa·s

M014-ISO 3219/A.3

Color value (Hazen)

≤ 40

M017-EN 1557

Monomeric HDI

 < 0.10

%

M106-ISO 10283

 

Other data*

Property

Value

Unit of measurement

Method

Viscosity at 25 °C

C approx. 450

mPa·s

M014-ISO 3219/A.3

Equivalent weight

approx. 214

Flash point

approx. 50

°C

DIN 53213

Density at 20 °

C approx. 1.13

 g/ml

DIN 53213

Solubility / thinnability:

Desmodur® ultra N 3390 BA can be thinned with esters, ketones and aromatic hydrocarbons such as ethyl acetate, butyl acetate, methoxypropylacetate,acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene,xylene, solvent naphtha® 100 and mixtures thereof. Generally speaking,it has good compatibility with the solvents listed. However, the solutions

formed must be tested for their storage stability. Only PU grade solvents should be used (max. 0.05 % water, absence of reactive groups such as hydroxyl or amino groups). Aliphatic hydrocarbons are unsuitable as solvents.

Desmodur®ultra N 3390 BA should not be thinned to below a solids content of 40 %. Prolonged storage of a solution with a lower binder content may result in turbidity and sedimentation.

Compatibility：

Generally speaking, Desmodur® ultra  N  3390  BA can be mixed with the following products: aliphatic polyisocyanates such as Desmodur® N  100, N 75, N 3200, N 3400, ultra N 3600 and Desmodur® Z 4470;aromatic polyisocyanates such as Desmodur® L/ultra L, HL and IL/ultra IL;polyester polyols such as Desmophen® 670 and polyacrylates. However, the compatibility of the combinations used should always betested.

Desmodur® ultra N 3390 BA is not compatible with branched polyester polyols such as Desmophen® 651 or polyether polyols such as Desmophen® 1380 BT.

 

Properties / Applications：

Desmodur® ultra  N  3390  BA is used primarily as the hardener component for lightfast two-component polyurethane coatings withhigh resistance to chemicals and weathering,very good gloss retention and outstanding mechanical properties. Preferred co-reactants are polyacrylate or polyester polyols.

The main applications for systems based on Desmodur® ultra  N  3390  BA are air- andforce-drying coatings for automotive OEM, automotive refinishing,transportation, industrial finishing and plastics.

 

Storage :

– Storage in original sealed Covestro container.

– Recommended storage temperature: 0 – 30 °C.

– Protect from moisture, heat and foreign material.

General information: The product is sensitive to moisture. Storage at higher temperatures will result in increase of color and viscosity.

 

Storage time：

Covestro represents that, for a period of nine months following the day of shipment as stated in the respective transport documents, the product will meet the specifications orvalues set forth in section “specifications or characteristic data” above, what ever is applicable, provided that the product is stored in full compliance with the storage conditions set forth in and referenced under section “storage” above and is otherwise handled appropriately.

The lapse of the nine months period does not necessarily mean that the product no longer meets specifications or the set values. However, prior to using said product, Covestrorecommends to test such a product if it still meets the specifications or the set values. Covestro does not make any representation regarding the product after the lapse of thenine months period and Covestro shall not be responsible or liable in any way for the product failing to meet specifications or the set values after the lapse of the nine months period.

Labeling and statutory requirements ：

This product data sheet is only valid in conjunction with the latest edition of the corresponding Safety Data Sheet. Any updating of safety-relevant information– in accordance with statutory requirements – will only be reflected in the Safety Data Sheet, copies ofwhich will be revised and distributed. Information relating to the current classification and labeling, applications and processing methods and further data relevant to safety can be found in the currently valid Safety Data Sheet.

Further information ：

The product is used mainly as a hardener in coating materials or adhesives. The handling of coating materials or adhesives containing reactive polyisocyanates and residual monomeric HDI requires appropriate protective measures referred to in the safety data sheet. These products may therefore be used only in industrial or trade applications. They are not suitable for use in homeworker (DIY) applications.

Storage and Transportation:

STORAGE: It is recommended to store in a dry and cool area with proper ventilation.

Packaging:

200KG/drum Please fasten the packaging cover as soon as possible after original packaging to prevent the mixing of other substances such as moisture and other substances that may affect the performance of the product. Do not inhale dust, avoid skin and mucous membrane contact. Smoking, eating and drinking are prohibited in the workplace. After work, shower and change clothes. Store contaminated clothes separately and reuse them after washing. Maintain good hygiene practices.

E_mail us : [email protected]

HDI trimer NPU HXR-100

HDI trimer NPU HXR-100

ABOUT:

constitute

Polyisocyanates modified with HDI-based isocyanate trimers

Supply Form

100% solids

use

Used as a non-yellowing curing agent for two-component coatings with good weathering resistan

Typical property indicators:

C-HXLV

Coronate-HXR

Coronate-HX

C-HK

appearances

Light yellow liquid

NCO content (%)

22.5-23.9

21.6-22.1

20.5-22.0

19.3-20.7

Solid content (%)

100

100

100

100

Viscosity 25°C (mm2/s)

800-1500

1700-3300

1300-3600

3620-14800

Color number (APHA NO.)

＜40

＜40

＜80

＜80

Free HDI content (wt%)

＜0.2

＜0.2

＜0.6

＜1.0

Specific gravity 20°C

1.17

1.17

1.16

1.17

Characteristics :

CORONATE HXR, HXLV, HX or HK are non-yellowingcuring agents for polyurethane coatings with better properties than diurethane condensate urethane adducts. CORONATE HXR, HXLV, HX or HK are widely used in motorcycle parts, automobile refinishing and wood coatings because of their good heat resistance and good compatibility with polyols and solvents.

 

Storage and Transportation:

STORAGE: It is recommended to store in a dry and cool area withproper ventilation.

Packaging:

200KG/drum Please fasten the packaging cover as soon as possibleafter original packaging to prevent the mixing of other substances such as moisture and other substances that may affect the performance of the product. Do not inhale dust, avoid skin and mucousmembrane contact. Smoking, eating and drinking are prohibited in the workplace. After work, shower and change clothes. Store contaminated clothes separately and reuse them after washing. Maintaingood hygiene practices.

E_mail us : [email protected]

Covestro Desmodur N100 HDI polyisocyanate light-resistant curing agent

Type

aliphatic polyisocyanate (HDIbiuret)

Form of Supply

Solvent free

Purpose

used as curing agent component in lightfast polyurethane coating system

Specifications

Features

Value

Measurement unit

Method

NCOcontent

22.0±0.3

%

DIN EN ISO 11909

<span style=”font-family:�

1.41

g/ml

DIN EN ISO 2811

Flashpoint

about 181

°C

DIN 22719

*This data is general information , are not part of the product specification.

Solubility/Dilution
Desmodur® N100 can be used with esters, ketones and aromatic solvents Such as: methoxypropyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, 100# solvent naphtha and their mixtures for dilution. Generally speaking, it has better compatibility with the above solvents. However, the storage stability of the prepared solution must be tested. Polyurethane grade solvents should be used (less than 0.05% water, free of reactive groups such as hydroxyl or amino groups). Aliphatic hydrocarbons are not suitable as solvents. Do not dilute Desmodur® N100 below 40% solids. Solutions with low binder content may develop turbidity and precipitation after long-term storage.

Compatibility
Desmodur® N100 can generally be used with the following products. Namely: Desmodur® N3200, N3300, N3400, N3600 and Desmodur® Z4470 type aliphatic polyisocyanate; Desmodur® L, HL and IL type aromatic polyisocyanate; Desmophen® 651 and 670 type polyester polyol Desmophen® A type polyacrylic acid Esters; Desmophen® 1380BT-like polyether polyols. However, the compatibility of the prepared solutions must be tested. Properties/Applications Desmodur® N100 is primarily used as a curing agent for lightfast two-component polyurethane coatings with high chemical and weather resistance, excellent gloss retention and mechanical properties. Preferred coreactants are polyacrylates and polyester polyols. Coating systems formulated with Desmodur® N100 are suitable for self-drying or baking, for automotive paints and industrial coatings, such as wood, furniture, plastics and Corrosion protection. StoreDesmodur® N100 Sensitive to moisture and should therefore be stored in tightly closed containers. Stored at 5-25°C in the original container, this product has a shelf life of at least 6 months.

Safety: Hazard Identification
Inhalation Harmful, may cause an allergic reaction by inhalation and skin contact.
Safety Data Sheet (028669) must be strictly followed. It includes relevant information such as labeling, transportation and storage, as well as relevant information on product use, product safety and ecology.

font-size:16px”> Harmful by inhalation, inhalation and skin Contact may cause an allergic reaction.
Safety Data Sheet (028669) must be strictly followed. It includes relevant information such as labeling, transportation and storage, as well as relevant information on product use, product safety and ecology.

Covestro Desmodur N3800 HDI polyisocyanate curing agent increases flexibility

Type Fat Family polyisocyanate (elasticHDItrimer)
Form of Supply None Solvent
Purpose Use Curing agent component for lightfast polyurethane coating systems

Specifications

Features Value Measurement unit Method
NCOcontent 11.0 ± 0.5 % DIN EN ISO 11909
viscosity,</sp; Dosmodur® N3800 can be mixed with: Aliphatic Polyisocyanateas Desmodur® N100, N75, N3200, N3400, N3600 and Desmodur® Z4470; AromaticPolyisocyanates such as Desmodur® L, HL and IL; Polyol polyesters such as Desmophen® 670;polyacrylic Esters such as Desmophen® A series. Compatibility must be tested before use. However, Desmodur® N3800 cannot be mixed with branched polyhydroxy polyesters such as Desmophen® 651 and polyhydroxy polyethers such as Desmophen® 1380BT.

Features/Applications
Dosmodur ® N3800 is mainly used as a curing agent in lightfast two-component polyurethane coating systems. It has high weather resistance and chemical corrosion resistance, excellent gloss retention and outstanding mechanical properties. Preferred co-reactants are polyacrylates or polyol polyesters. The coating system based on Dosmodur® N3800 is mainly used for self-drying and forcedDry car factory paints, automotive refinish and transportation coatings and general industrial and plastic coatings.

Save
The Product is moisture sensitive and should therefore be stored in original airtight container. When room temperature under proper storage conditions, the shelf life of this product is at least 6 months.

Safety: Hazard Identification
Because Contains isocyanates which may cause an allergic reaction in contact with skin. The product safety data sheet must be strictly followed, which includes labeling, transportation, storage and product disposal,Product safety and ecological impact information.

Covestro Desmodur N3790 BA HDI polyisocyanate curing agent light fast drying

Type aliphatic polyisocyanate(High functional group hexamethylene diisocyanate trimer)
Form of Supply about90% butyl acetate solution
Purpose Used as a lightfast, fast-drying polyurethane coating curing agent component

 

Specifications

Features Value Measurement unit Method
NCOcontent 17.8±0.5 % DIN EN ISO 11909method
Viscosity,23°C about 1600 mPa ·s DIN EN ISO 3219/A.3
equivalent about 236
Flashpoint about 42 °C DIN 53213/1
Density@20°C about 1.13 g/ml DIN EN ISO 2811

*This data is general information , are not part of the product specification.

 

Solubility/Dilution
Desmodur ® 3790BA can be used with esters, ketones, and aromatic solvents such as: ethyl acetate, butyl acetate, methoxypropyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, 100 No. naphtha solvent and its mixture diluted. Generally have good miscibility with these solvents.
But The storage stability of the prepared solution must be tested. Polyurethane grade solvents should be used (less than 0.05% water, no hydroxyl or amino reactive groups). Aliphatic hydrocarbons are not suitable as solvents. Desmodur® N3790 should not be diluted below 40% solids. Solutions with low binder content may develop turbidity and precipitation after long-term storage.

 

Compatibility
Desmodur ® N3790 can generally be used with the following products. Namely: Desmodur® N100, N75, N3200, N3400, N3600 and Desmodur® Z4470 type aliphatic polyisocyanate; Desmodur® L, HL and IL type aromatic polyisocyanate; Desmophen® 670 type polyester polyol; Desmophen® A type polyisocyanate Acrylate. However, the compatibility of the prepared solutions must be tested. Desmodur® N3790 is not compatible with branched polyester polyols such as Desmophen® 651 or polyether polyols such as Desmophen® 1380BT.

 

Features/Applications
Desmodur ® N3790 is mainly used as the curing agent component of lightfast two-component polyurethane coatings, which have excellent chemical and weather resistance, outstanding gloss retention and excellent mechanical properties. Ideal co-reactants are polyacrylate or polyester polyols. Coating systems formulated with Desmodur® N3790 are suitable for self-drying or baking and are used for the finishing of automotive original equipment (OEM), car refinishing, transportation vehicles, industrial products and plastics.

 

Save
Desmodur ® N3790 is moisture sensitive and should therefore be stored in its tightly sealed original container. When stored under proper conditions at room temperature, this product has a shelf life of at least 6 months.

�.
But The storage stability of the prepared solution must be tested. Polyurethane grade solvents should be used (less than 0.05% water, no hydroxyl or amino reactive groups). Aliphatic hydrocarbons are not suitable as solvents. Desmodur® N3790 should not be diluted below 40% solids. Solutions with low binder content may develop turbidity and precipitation after long-term storage.

 

Compatibility
Desmodur ® N3790 can generally be used with the following products. Namely: Desmodur® N100, N75, N3200, N3400, N3600 and Desmodur® Z4470 type aliphatic polyisocyanate; Desmodur® L, HL and IL type aromatic polyisocyanate; Desmophen® 670 type polyester polyol; Desmophen® A type polyisocyanate Acrylate. However, the compatibility of the prepared solutions must be tested. Desmodur® N3790 is not compatible with branched polyester polyols such as Desmophen® 651 or polyether polyols such as Desmophen® 1380BT.

 

Features/Applications
Desmodur ® N3790 is mainly used as the curing agent component of lightfast two-component polyurethane coatings, which have excellent chemical and weather resistance, outstanding gloss retention and excellent mechanical properties. Ideal co-reactants are polyacrylate or polyester polyols. Coating systems formulated with Desmodur® N3790 are suitable for self-drying or baking and are used for the finishing of automotive original equipment (OEM), car refinishing, transportation vehicles, industrial products and plastics.

 

Save
Desmodur ® N3790 is moisture sensitive and should therefore be stored in its tightly sealed original container. When stored under proper conditions at room temperature, this product has a shelf life of at least 6 months.

Covestro Bayhydur XP 2655 Hydrophilic HDI polyisocyanate Low viscosity and easy to disperse

Type Hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI), used as curing agent component of waterborne two-component polyurethane systems

Supply Form 100 %

Specifications

Features Value unit Test method
NCO content 20.3 – 21.3 % M105 -ISO 11909
Viscosity,23°C 3,500 ± 1,000 mPa ·s M014 -ISO 3219/A.3
Hazencolor value < 60   <span style=”font-famiary Water-based systems need to have the characteristics of good combination stability and chemical resistance. Although relatively weakly hydrophilic, this curing agent emulsifies easily in aqueous phases, even under the low shear forces common in commercial applications. Coatings prepared using this product form high gloss, low haze films.
Generally, when mixing with a hydrophilic curing agent, especially an ionic hydrophilic polyol dispersion, it can be diluted with water in advance or a small amount of organic co-solvent can be added to control the increase in viscosity. Due to the balance between moderate hydrophilicity and high functionality, waterborne two-component polyurethane coatings prepared with Bayhydur XP 2655 are characterized by fast drying and rapid hardening, forming films with high final hardness and excellent chemical resistance characteristics. Bayhydur XP 2655 can also be used as a crosslinking aid for waterborne polyols (Bayhydrol®) and for most neutral waterborne polymer dispersions such as polyurethane, polyvinyl acetate, polyacrylate and synthetic rubber dispersions. joint agent.
After adding Bayhydur XP 2655, the ready-to-use two-component coating must be used within the pot life. Pot life is influenced by polymer content and other components such as resins, thickeners, plasticizers, etc. In many dispersions, the end of the pot life (often a few hours) does not show signs of gelation.

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– Store in a Covestro airtight container;
– Recommended storage temperature: 0-30°C;
– Resists moisture, heat and foreign substances.

General Information :Hydrophilic isocyanates are very sensitive to moisture and react with water to form carbon dioxide and water-insoluble urea. It must therefore be stored in airtight containers. Water in all forms (humid air, solvents, wet containers) must be prevented because of the dangerous build-up of pressure caused by the production of carbon dioxide. High temperature storage will cause a slight increase in viscosity and color.

Storage Time
When the product is stored in full compliance with the requirements of the above “storage” clause and handled properly, the product meets the requirements within 6 months from the date of transportation stated on the transportation document. Specifications or characteristic values ​​described in the “Specification or characteristic values” clause above, as applicable. If the product exceeds the above-mentioned 6-month period, it does not mean that it no longer meets the set values ​​in the specifications or characteristic values. However, it is recommended that products older than 6 months from the date of shipment be tested before use to confirm that they still comply with the values ​​set in the specifications or characteristic values. The manufacturer does not make any promises for products that have been shipped more than 6 months from the date of shipment, and does not assume any responsibility and liability for non-compliance with specifications or set values ​​​​in the characteristic values.