Curable composition
View Patent ↗The invention aims to improve surface tackiness of a curable composition comprising a reactive silicon group-containing polyoxypropylene polymer without decreasing coating workability, strength, adhesion and appearance. As one embodiment of a means for resolution, a curable composition comprising (A) 100 parts by weight of a reactive silicon group-containing polyoxypropylene polymer, (B) from 0.1 to 20 parts by weight of a silane coupling agent, (C) from 0.1 to 80 parts by weight of an epoxy group-containing compound, (D) from 0.1 to 60 parts by weight of a tertiary amine, and (E) from 0.1 to 30 parts by weight of a primary or secondary amine having a melting point of 20° C. or more is mentioned.
1. A two-component curable composition comprising agent A comprising
(A) x parts by weight of a reactive silicon group-containing polyoxypropylene polymer,
(B) from 0.2 to 10 parts by weight of a silane coupling agent,
(D) from 1 to 40 parts by weight of a curing agent for an epoxy resin containing a tertiary amine, and
(E) from 1 to 20 parts by weight of a primary or secondary amine having a melting point of 20° C. or more (provided 0<x≦100), and from 0.2 to 6 parts by weight of a tetravalent organo-tin condensation catalyst, and
agent B comprising
(A) 100-x parts by weight of the reactive silicon group-containing polyoxypropylene polymer,
(C) from 1 to 60 parts by weight of an epoxy resin, and
(F) from 0.1 to 5 parts by weight of water.
2. The curable composition as claimed in claim 1 , wherein the viscosity of the composition is at least 50 Pa·s and at most 200 Pa·s at 23° C., and the structural viscosity index thereof is at least 4.0 and at most 10.
3. The curable composition as claimed in claim 1 , which further comprises
(G) from 50 to 300 parts by weight of an inorganic filler.
4. The curable composition as claimed in claim 1 , wherein component (E) is a primary amine.
5. A coating material comprising the curable composition as claimed in claim 1 .
6. The curable composition as claimed in claim 1 , wherein component (D) is an araliphatic amine.
7. The curable composition as claimed in claim 1 , wherein component (D) is a 2,4,6-tris(dimethylaminomethylphenol).
8. The curable composition of claim 1 , wherein x=100.
9. The two-component curable composition of claim 1 , wherein the tetravalent organo-tin condensation catalyst is selected from the group consisting of dibutyltin dilaurate, bis(dibutyltin laurate) oxide, dibutyltin maleate dibutyltin diacetate, a reaction product of dibutyltin oxide and a phthalate, a reaction product of dibutyltin oxide and a maleate, a reaction product of dibutyltin oxide and ethyl silicate and dibutyltin bisacetylacetonate.