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

Claim 3:
4. The mask substrate composition according to claim 1, wherein, (a1) the polyisocyanate has two isocyanate groups, and is one or more selected from the group consisting of aliphatic isocyanates and alicyclic isocyanates;
(a2) the polyester polyol has a number-average molecular weight of 800-3000, and a functionality of 2-3; and (a2) 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, 1,2-propylene glycol, 1,4-butylene glycol, 1,3-butylene glycol, 1,6-hexylene glycol, trimethylolpropane and neopentyl glycol;
(a3) the low-molecular weight diol chain extender is one or more selected from the group consisting of ethylene glycol, diethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, 1,4-butylene glycol, 1,3-butylene glycol, cyclohexanediol, 1,4-cyclohexanedimethanol, 1,6-hexylene glycol and neopentyl glycol;
(a4) the polyamine chain extender (a) has 2-20 carbon atoms and a functionality of 2-3, and is one or more selected from the group consisting of ethylenediamine, propylene diamine, butanediamine, hexamethylenediamine, isophorone diamine, 1,4-cyclohexanediamine, 4,4′-dicyclohexylmethanediamine and diethylenetriamine;
(a5) 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
(a6) the small-molecule monoamino end-capping agent has 2-10 carbon atoms and a functionality of 1, and is diethanol amine, trihydroxy amine and/or 2-amino-2-methyl-1-propanol.