MOISTURE CURABLE COMPOSITIONS AND LOW SURFACE ENERGY COATING COMPOSITIONS MADE THEREFROM

摘要

A one-package moisture curable composition is provided. The composition comprises, by weight percentage based on the dry weight of the composition, from 10 to 99% at least one silane terminated polyurethane and from 1 to 90% at least one silane terminated polysiloxane! wherein the silane terminated polyurethane based polymer has at least one end group of the general formula^ - A-(CH2)m-SiR1 n (OR2)3-n, wherein A is a urethane or urea linkage group, R1 is selected from C1-12 alkyl, alkenyl, alkoxy, aminoalkyl, aryl and (meth)acryloxyalkyl groups, R2 is each substituted or unsubstituted C1-18 alkyl or C6-C20 aryl groups, m is an integer from 1 to 60, and n is an integer from 0 to V, and wherein the silane terminated polysiloxane can be the polysiloxane based polymer with hydrolysable silane group or the reaction products of at least one organofunctional polysiloxane and at least one organofunctional silane; and wherein the composition, after moisture cured, forms a surface whose water contact angle is larger than 101°. The composition is suitable for the applications in coatings which afford low surface energy surface and improved mechanical performance, such as marine antifouling coating, anti-icing coating, anti-stain coating, self-cleaning coating, and non-sticky coating, etc.