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US 10,421,833 B2Granted
Method for improving toughness of polyisocyanate polyaddition reaction products
AssigneeHuntsman International LLC
InventorsHugo Verbeke, Hans Godelieve Guido Verbeke, Christian Esbelin, Ainara Astaburuaga Gutierrez
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Abstract
Use of compounds selected from polyols derived from dimer fatty acids and/or dimer fatty alcohols as toughening agent in a process for making polyisocyanate polyaddition reaction products, in particular for polyisocyanate polyaddition reaction products having a hardblock >40% and a process for making said products.
Claims13
A method for improving the toughness of polyisocyanate polyaddition reaction products having a glass transition temperature of at least 80° C. said method comprising at least reacting at an isocyanate index ranging from 150 to 969:
- (a) isocyanates, and
- (b) isocyanate-reactive compounds, and
- (c) catalyst compounds comprising at least one trimerization catalyst, and optional
- (d) blowing agents and/or other auxiliary compounds
- characterized in that the isocyanate-reactive compounds (b) comprise 1-20 parts by weight, based on the total weight of ingredients (a)-(d), of compounds selected from polyols derived from dimer fatty acids and/or dimer fatty alcohols wherein the hardblock content of the polyisocyanate polyaddition reaction products is at least 40% by weight and the polyisocyanate polyaddition products have a toughness value G1c>300 J/m2.
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Dependencies are inferred from the claim text.