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US 2022/0025100 A1Published application
Thermolatent catalyst for polymerization of isocyanates
AssigneeCovestro Intellectual Property GmbH & Co. KG
InventorsYan Deng, Heiko Hocke, Dongbo Zhao, Ruqi Chen
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Abstract
The present invention relates to novel thermolatent catalysts for the manufacture of isocyanurate and polyisocyanate polymers.
Claims14
A method for producing a polymer comprising:
- a) providing a polymerizable composition having a molar ratio of isocyanate groups to all functional groups reactive with isocyanate in the polymerizable composition of at least 3.0:1.0 comprising
- (i) a liquid phase comprising at least one polyisocyanate,
- (ii) a solid phase comprising at least one catalyst comprising a metal salt having a carboxylate of an aliphatic carboxylic acid comprising at least 12 carbon atoms or a phenolate as an anion capable of crosslinking the polyisocyanate so that a polymer is formed, wherein said catalyst is solid below a temperature of 50° C. and is liquid or dissolved at a polymerization temperature of 60° C. to 280° C., and
- b) heating the polymerizable composition to the polymerization temperature and maintaining said temperature at least until the polymerizable composition reaches the gel point.
1 more element
A method of crosslinking isocyanate groups, comprising catalyzing isocyanate crosslinking with a catalyst comprising at least one metal salt, wherein the metal is selected from the group consisting of potassium, lithium, sodium, calcium, and barium and wherein said metal salt is solid below a temperature of 50° C. and is liquid at a polymerization temperature.
Dependencies are inferred from the claim text.