Patent ID: 11964032
Assignee: WANHUA CHEMICAL GROUP CO., LTD.
Field: Pharmaceuticals (Chemistry)
Classification: CPC A  C | IPC A  C

Claim 5:
6. The mask substrate composition according to claim 1, wherein, (b1) the polyisocyanate has 2 to 4 isocyanate groups, and is one or more selected from the group consisting of aliphatic polyisocyanates and alicyclic polyisocyanates;
(b2) the polyester polyol has a number-average molecular weight of 20-14000, and a functionality of 2-3; and (b2) the polyester polyol is prepared by a polymerization reaction of organic polycarboxylic acid and/or anhydride thereof and polyol, wherein the organic polycarboxylic acid and/or anhydride thereof are one or more selected from the group consisting of succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, phthalic acid, isophthalic acid, terephthalic acid and anhydrides thereof; and the polyol is one or more selected from the group consisting of ethylene glycol, butanediol, neopentyl glycol and hexylene glycol;
the number-average molecular weight of (b3) the polyethylene glycol monomethyl ether is 700-2000;
(b4) the polyamine chain extender (a′) has 2-13 carbon atoms and a functionality of 2-3, and is one or more selected from the group consisting of 1,2-ethylenediamine, 1,6-hexamethylenediamine, isophorone diamine, piperazine, 1,4-diaminocyclohexane, bis-(4-aminocyclohexyl)methane, N-(2-hydroxyethyl)ethylenediamine and diethylene triamine;
(b5) the polyamine chain extender (b′) is diamine substituted by an ionic or potentially ionic group, and is a sodium salt of N-(2-aminoethyl)-2-aminoethanesulfonic acid and/or a sodium salt of N-(2-aminoethyl)-2-aminopropanesulfonic acid; and
(b6) the polyhydroxyl chain extender is trimethylolpropane.