Crosslinkable saccharide-siloxane compositions, and networks, coatings and articles formed therefrom

摘要

The invention provides a cross-linkable composition comprising a saccharide-siloxane copolymer according to a specified structural formula, a crosslinking agent, and, optionally, solvent. Cross-linked polymeric networks, cured coatings, and articles of manufacture formed from the inventive compositions are also provided, as well as processes and methods of manufacturing the inventive cross-linkable compositions and applications thereof.

主权项

1. A cross-linkable composition comprising:
a) a saccharide-siloxane copolymer; b) a crosslinking agent; and c) optionally, solvent, wherein the saccharide-siloxane copolymer has the following formula:
R2aR1(3-a)—SiO—[(SiR2R1O)m—(SiR12O)n]y—SiR1(3-a)R2a wherein each R1 can be the same or different and comprises hydrogen, C1-C12 alkyl, an organic radical, or R3-Q, Q comprises an epoxy, cycloepoxy, primary or secondary amino, ethylenediamine, carboxy, halogen, vinyl, allyl, anhydride, or mercapto functionality, m and n are integers from 0 to 10,000 and may be the same or different, each a is independently 0, 1, 2, or 3, provided that if a is 0 then m is from 1 to 10,000 and if m is 0, then a is 1, 2 or 3, y is an integer such that the copolymer has a molecular weight less than 1 million, R2 has the formula Z-(G1)b-(G2)c, and there is at least one R2 per copolymer, wherein G1 is a saccharide component comprising 5 to 12 carbons, b+c is 1-10, b or c can be 0, G2 is a saccharide component comprising 5 to 12 carbons additionally substituted with organic or organosilicon radicals, Z is the linking group and is independently selected from the group consisting of: —R3—NHC(O)—R4—; —R3—NHC(O)O—R4—; —R3—NH—C(O)—NH—R4—; —R3—C(O)—O—R4—; —R3—O—R4—; —R3—CH(OH)—CH2—O—R4—; —R3—S—R4 —R3—CH(OH)—CH2—NH—R4—; and —R3—N(R1)—R4, and R3 and R4 are divalent spacer groups comprising (R5)r(R6)s(R7)t, wherein at least one of r, s and t must be 1, and R5 and R7 are independently an alkylene group of 1 to 12 carbons or a group of formula (R9O)p wherein p is any integer 1-50, each R9 is a divalent organic group of 1 to 12 carbons and each R9O may be the same or different, R6 is —N(R8)—, where R8 is H or C1-C12 alkyl, and at least one of R3 and R4 must be present in the linking group and may be the same or different, wherein the saccharide-siloxane copolymer comprises a reaction product of a functionalized organosiloxane polymer and at least one polyhydroxy-functional saccharide such that the organosiloxane is covalently linked via the linking group, Z, to the at least one polyhydroxy-functional saccharide.