申请人:Evonik Degussa GmbH
公开号:US10093826B2
公开(公告)日:2018-10-09
The present invention relates to alkoxysilane-functionalized, allophanate-containing coating compositions, to a process for producing them, and to their use. In particular, the alkoxysilane-functionalized, allophanate-containing coating compositions include a) as a binder component, 10-99 wt % of at least one reaction product of i) at least one monourethane i) containing alkoxysilane groups and of the formula 1
Rn(OR1)3-nSi—R2—NH—(C═O)—OR3 formula 1
where R, R1, R2 and R3 are each independently hydrocarbyl radicals having 1-8 carbon atoms, which may be linear, branched or cyclic, or else may be integrated together to form a cyclic system, and n is 0-2, and ii) at least one diisocyanate ii), in a molar ratio of i) to ii) of from 3:1 to 1.5:1, preferably from 2.5:1 to 1.8:1, particularly preferably 2:1; b) 1-90 wt % of at least one other binder component, different from a), preferably a hydroxyl-containing or amino-containing binder component, c) 0-50 wt % of at least one aromatic, aliphatic or cycloaliphatic polyisocyanate having an NCO functionality of at least 2, preferably 2.8 to 6, d) 0-5 wt % of at least one catalyst, where components a)-d) add up to 100 wt %.
本发明涉及烷氧基硅烷官能化的含异氰酸酯涂料组合物、其生产工艺及其用途。特别是,含烷氧基硅烷官能化异烷酸酯的涂料组合物包括 a) 作为粘合剂成分,10-99 wt % 的至少一种反应产物,该反应产物为 i) 至少一种含有烷氧基硅烷基团且式 1 的单甲酸乙酯 i)
Rn(OR1)3-nSi-R2-NH-(C═O)-OR3 式 1
其中 R、R1、R2 和 R3 各自独立地为具有 1-8 个碳原子的烃基,它们可以是直链的、支链的或环状的,否则可以整合在一起形成环状体系,且 n 为 0-2,以及 ii) 至少一种二异氰酸酯 ii),其 i)与 ii)的摩尔比为 3:1 至 1.5:1,优选为 2.5:1 至 1.8:1,特别优选 2:1; b) 1-90 重量%的至少一种不同于 a) 的其他粘合剂组分,优选含羟基或含氨基的粘合剂组分, c) 0-50 重量%的至少一种芳香族、脂肪族或环脂族多异氰酸酯,其 NCO 官能度至少为 2,优选 2.8 至 6, d) 0-5 重量%的至少一种催化剂,其中 a)-d) 组分相加达 100 重量%。