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US 5,086,153 AGranted
Process for producing polyurea resin
AssigneeIhara Chemical Industry Co., Ltd.
InventorYoshijiro Oyaizu
Life of this patent
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Abstract
A process for producing polyurea resin in which an amine compound containing aromatic polyamine and specific aminobenzoate derivative and polyisocyanate are reacted. The polyurea resin is decreased in temperature dependence and improved in hardness, strength, toughness, and heat resistance.
Claims11
A process for producing polyurea resin, which comprises reacting a first aromatic amine compound having the formula:
- ##STR3## wherein R is an n-valent polyalkylene, polyalkylene ether or polyalkylene polyester group with an average molecular weight of at least 200, which group is saturated or contains an unsaturated bond;
- A is --O--or --NH--;
- m is an integer of 2 or 3;
- and n is an integer of 2 to 4;
- with a second aromatic amine and a polyisocyanate, wherein the amount of the second aromatic amine is 5-50% by weight based on the total amount of amine component, and wherein the second aromatic amine is an aromatic amine of an aminobenzoate selected from the group consisting of 1,3-propanediol bis(4-aminobenzoate), 1,4-butanediol bis(4-aminobenzoate), diethylene glycol bis(4-aminobenzoate) and triethylene glycol bis(4-benzoate).
2 more elements
Dependencies are inferred from the claim text.