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Polyisocyanate curing agents for polyurethane (PU) powder coatings are
primarily blocked aliphatic isocyanates (e.g., IPDI or HDI adducts) that provide excellent weatherability, chemical resistance, and smooth, high-performance finishes. They are used with hydroxyl-functional polyester or acrylic resins, curing at typical temperatures of 180°C or higher to form crosslinked, durable networks for outdoor applications.Key Types and Technologies
Common Curing Agent Products
- VESTAGON® EP-BF 1350: An aliphatic blocked polyisocyanate known for lower melt viscosity, improving flow and leveling, and enabling lower curing temperatures.
- Crelan® VP LS 2181/1: A specialized crosslinker designed for gloss reduction.
- HC-304 Polyurethane Curing Agent: A polyisocyanate adduct used for high-performance coatings, offering high heat resistance and good smoothness.
Performance Characteristics
- Durability: Provides excellent impact resistance, scratch resistance, and weatherability.
- Appearance: Results in flat, smooth, and, in some cases, low-gloss finishes.
- Cure Parameters: Typically requires high baking temperatures (), though new catalysts allow for lower temperatures.
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polyisocyanate curing agent for polyurethane powder coating
China AAB Industry Technology Group
https://www.aabindustrygroup.com › polyisocyanate-curi...
China AAB Industry Technology Group
https://www.aabindustrygroup.com › polyisocyanate-curi...
The numerous resin curing agent solutions for powder coatings provided by AAB can also help customers customize formula performance to meet their stringent ...Read more
HC-304 Polyurethane Curing Agent - Sevo
svcoating.com
https://www.svcoating.com › Curing Agent
svcoating.com
https://www.svcoating.com › Curing Agent
HC-304 is a polyisocyanate adduct used with hydroxyl resins, which is mainly used for the preparation of high-performance polyurethane powder coatings. The ...Read more
K7152 Polyisocyanate curing agent for powder coatings
kabasph.com
https://www.kabasph.com › powdercoatingadditives
kabasph.com
https://www.kabasph.com › powdercoatingadditives
K7152 is a blocked polyisocyanate curing agent for powder coatings, designed to cure with hydroxy polyester or hydroxy acrylic resin to provide a smooth, ...Read more
X-48-1801 | Shin-Etsu Silicone Selection Guide
Shin-Etsu Silicone
https://www.shinetsusilicone-global.com › resin_oligomers
Shin-Etsu Silicone
https://www.shinetsusilicone-global.com › resin_oligomers
When cold blended with polyisocyanate curing agents, it improves various coating performance, especially weather resistance and oil repellency.Read more
Powder Coating Additives
Allnex
https://allnex.com › markets-applications › paint-coatings
Allnex
https://allnex.com › markets-applications › paint-coatings
Amongst the family of hardeners that allnex provides, the isocyanate hardeners have proven and demonstrated weathering resistance, such as the ADDITOL® P 932.Read more
Polyisocyanate curing agent and coating and adhesive ...
Google Patents
https://patents.google.com › patent
Google Patents
https://patents.google.com › patent
A curing agent for a two-component polyurethane has as its main constituent a hexamethylene diisocyanate-derived polyisocyanate having a viscosity below ...
Polyurethane powder coatings with low curing temperature
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
by D Czachor-Jadacka2023Cited by 16 — Polyisocyanate components in a crosslinking agent can easily react with moisture or other molecules and are usually blocked by blocking agents containing ...Read more
New Crosslinkers for Polyurethane Powder Coating
PCI Magazine
https://www.pcimag.com › articles › 84086-new-crossli...
PCI Magazine
https://www.pcimag.com › articles › 84086-new-crossli...
Aug 1, 2002 — This article focuses on Bayer's newest polyisocyanate based powder crosslinker developments in an attempt to address these issues.Read more
Crosslinking Agent for Polyurethane Powder Coatings t-1530
ibuychem.com
https://en.ibuychem.com › offer
ibuychem.com
https://en.ibuychem.com › offer
T-1530 is a caprolactam closed isocyanate polymer,used as curing agent of polyurethane powder coating,the film made with it has a full and fine surface,high ...Read more
Polyester-Urethanes for the World-Market
danickspecialties.com
https://www.danickspecialties.com › PE_PU01
danickspecialties.com
https://www.danickspecialties.com › PE_PU01
PDF
by C Danick2001 — A typical 35-45 hydroxyl value polyester 2 can be cured with a variety of polymeric blocked isocyanates. The resulting powder coatings cure rate ...Read more