A composition, a preparation method and use thereof
AssigneeCovestro Deutschiand AG
InventorsShijie Zhou, Songli Wei, Rui Deng, Chen Jin, Jan Weikard, Dongbo Zhao
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Abstract
The present invention relates to a composition, a preparation method and use thereof, especially in the field of coatings, adhesives or inks, and an article obtained by preparing, coating, bonding, sealing or printing with the composition. The composition comprises (a) a polyurethane-polyurea polymer; (b) a chelating agent; and (c) water. The composition of the present invention has excellent low-temperature performance, good hydrolysis resistance and hydrolysis resistance after thermal storage and has low viscosity at the same time, which is good for industrial production.
Claims27
A composition comprising
- (a) a polyurethane-polyurea polymer obtained by the reaction of a system-product comprising the following components:
- (a1) a polyisocyanate;
- (a2) a polymer having a structure of formula I:
- wherein n is 10 to 75, R1 is an alkyl group containing 1 to 10 carbon atoms, and R2 is a moiety containing at least two isocyanate-reactive groups;
- (a3) a polyol other than component a2), which has a hydroxyl functionality of 1.5 to 4;
- (a4) a silane compound comprising one isocyanate-reactive group and at least two methoxy and/or ethoxy groups attached to the silicon atom;
- (a5) a hydrophilic compound comprising 2 to 3 isocyanate-reactive groups, different than (a2);
- and
- (a6) optionally, a compound comprising 1 to 3 amino and/or hydroxyl groups;
- wherein the polymer having a structure of formula I is in an amount of 0.7% by weight to 9% by weight, and the silane compound is in an amount of 0.14% by weight to 0.6% by weight, relative to the total weight of the polyurethane-polyurea polymer;
- (b) a water soluble chelating agent, which is one or more selected from the group consisting of ethylenediaminetetraacetates, tartrates, citrates, pyrophosphates, tripolyphosphates, hexametaphosphates and gluconates;
- and
- (c) water.
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Dependencies are inferred from the claim text.