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    • 8. 发明授权
    • UV-stable, water-borne polyester compositions
    • UV稳定的水性聚酯组合物
    • US5484842A
    • 1996-01-16
    • US247799
    • 1994-05-23
    • Ronald J. LewarchikMarc L. SmithMichael R. Sestrick
    • Ronald J. LewarchikMarc L. SmithMichael R. Sestrick
    • C08G63/60C08J3/03C08L67/00C09D167/00C08F22/00C08G63/00
    • C08G63/60C08J3/03C09D167/00C08J2367/00
    • Aqueous dispersions having low VOCs are dispersions or solutions of polyesters. The polyesters useful are formed from A) between about 30 and about 60 mole percent polycarboxylic acids, of which at least about 80 mole percent comprises cyclohexanedicarboxylic acids, B) between about 35 and about 70 mole percent polyols of which at least about 95 mole percent comprises diols, and between about 40 and about 100 mole percent of the polyol content comprising cycloaliphatic diols, and C) between about 5 and about 25 mole percent of a monomer having dihydroxy, monocarboxylic acid functionality. The molar ratio of (B+C)/A is between about 1.01 and about 1.30, whereby the polyester is hydroxyl-terminated having hydroxyl numbers of between about 20 and about 150 and acid numbers between about 30 and about 100. The weight average molecular weight of the polyester is between about 1000 and about 20,000. In aqueous dispersions or solutions, the acid functionality of the polyester is neutralized with base to at least about 40%.
    • 具有低VOC的水性分散体是聚酯的分散体或溶液。 可用的聚酯由A)约30-约60摩尔%的多元羧酸形成,其中至少约80摩尔%包括环己烷二羧酸,B)约35-约70摩尔%多元醇,其中至少约95摩尔% 包含二醇,以及约40至约100摩尔%的包含脂环族二醇的多元醇含量,和C)约5至约25摩尔%的具有二羟基单羧酸官能团的单体。 (B + C)/ A的摩尔比在约1.01至约1.30之间,由此聚酯是羟基封端的,羟值为约20至约150,酸值为约30至约100.重均分子量 聚酯的重量为约1000至约20,000。 在水分散体或溶液中,聚酯的酸官能度用碱中和至少约40%。