Moisture curable silylated polymer compositions containing reactive modifiers

摘要

A moisture-curable resin composition comprising (a) a moisture-curable polymer having at least one hydrolysable silyl group; (b) a reactive modifier; (c) a catalyst for catalyzing the reaction between the moisture-curable polymer (a) and reactive modifier (b) under curing conditions; and optionally, the composition can contain one or more conventional components, including pigments, fillers, curing catalysts, dyes, plasticizers, thickeners, coupling agents, extenders, volatile organic solvents, wetting a agents, tackifiers, crosslinking agents, thermoplastic polymers, ultraviolet stabilizers, and combination thereof. The moisture-curable resin composition is useful in the production of adhesives including hot melt adhesives, primers, sealants and coatings.

主权项

1. A moisture-curable resin composition comprising:
(a) a moisture-curable polymer having at least one hydrolysable silyl group wherein the polymer is represented by the general Formula (3): wherein:
each occurrence of R6 is independently a monovalent or polyvalent organic polymer fragment having a number average molecular weight of from 500 to 25,000 grams per mole and derived from a hydroxyl-terminated polypropylene oxide having a terminal ethylenic unsaturation of less than 0.02 milliequivalents per gram polyol and containing at least one urethane functional group;each occurrence of R7 is independently a divalent alkylene group containing from 1 to 6 carbon atoms;each occurrence of A1 is divalent oxygen (—O—);each occurrence of A2 is substituted nitrogen of the structure —NR8—, wherein R8 is hydrogen;each occurrence of X1 is independently R9O—, wherein each R9 is independently hydrogen or an alkyl group containing from 1 to 4 carbon atoms;each occurrence of X2 and X3 is independently selected from the group consisting of R9O— and R10 wherein each R9 is independently hydrogen or an alkyl group containing from 1 to 4 carbon atoms and each R10 is independently an alkyl group containing from 1 to 4 carbon atoms; and,each occurrence of subscripts e and f is independently an integer wherein e is 1 and f is 1 to 6; (b) a reactive modifier of the general Formula (2):
G2[-SiR4c(OR5)3-c]d  (Formula 2) wherein:
G2 is selected from the group consisting of a monovalent or divalent linear hydrocarbon group containing from 3 to 16 carbon atoms;each occurrence of R4 is monovalent alkyl group containing from 1 to 4 carbon atoms;each occurrence of R5 is monovalent alkyl group containing from 1 to 4 carbon atoms;each occurrence of c and d is independently an integer, wherein; c is 0 or 1; and d is 1 or 2 with the provisos that,(i) when G2 contains a heteroatom, the terminal atoms of G2 are carbon atoms; and(ii) when the silicon atom is attached to G2, the silicon atom is covalently bonded to a terminal carbon of G2; and (c) at least one catalyst which is a compound selected from the group consisting of organic dibutyltin, zirconium complex, aluminum chelate, titanic chelate, organic zinc, organic cobalt, organic iron, organic nickel, organobismuth and amine for catalyzing the reaction between the moisture-curable polymer (a) and reactive modifier (b) under moisture curing conditions; andwherein component (b) is present in an amount of from 20 weight percent to 40 weight percent and component (c) is present in an amount of from 0.1 to 3 weight percent, based upon the total weight of components (a), (b) and (c).