BLOCKED POLYISOCYANATE-CONTAINING CURABLE SILICONE COMPOSITION AND TEXTILE TREATMENT USING THE SAME

摘要

A blocked polyisocyanate-containing curable silicone composition includes an amino group-containing organopolysiloxane, a blocked polyisocyanate and a catalyst which is an organic base compound and/or a metal compound. The composition has a high curability even under low-temperature conditions and, when used as a textile treatment, imparts textile fibers and products with good softness and water absorbency, and also has an excellent durability to washing.

主权项

1. A blocked polyisocyanate-containing curable silicone composition comprising:
(A) 70 to 98 parts by weight of an organopolysiloxane having a terminal or pendant group of general formula (1) belowwherein R5 is a divalent hydrocarbon group of 1 to 8 carbon atoms, the letter “a” is an integer from 0 to 4, and each R6 is independently a hydrogen atom, a monovalent hydrocarbon group or acyl group of 1 to 10 carbon atoms, or a polyoxyalkylene-containing organic group of the formula
—CH2—CH(OH)CH2O—(C2H4O)b—C3H6O)c—Z,wherein Z is a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group or acyl group of 1 to 20 carbon atoms, b is an integer from 2 to 30, c is an integer from 0 to 20, and the oxyethylene units and oxypropylene units may form a block polymer or may form a random polymer;
(B) 2 to 30 parts by weight of a blocked polyisocyanate which has at least two isocyanate groups per molecule, at least 50 mol % of the isocyanate groups being blocked with a thermally labile blocking agent, with the proviso that the combined amount of components (A) and (B) is 100 parts by weight; and (C) 0.01 to 10 parts by weight of a catalyst which is an organic base compound or a metal compound or both.