Curable composition

摘要

An object of the present invention is to provide a curable composition which is made mainly of a polymer having one or more reactive silicon groups, has good curability even when filler is used while a non-organotin catalyst is used, and is further high in industrial practicability. The object is solved by a curable composition, comprising, as constituents, a polymer (A) having one or more reactive silicon groups on average per molecule thereof, the reactive silicon group(s) being (each) a group which can be crosslinked by forming a siloxane bond, a Lewis acid and/or derivative thereof (B), an amine compound (C), a compound (D) having a reactive silicon group, and filler (E), and obtained by mixing the constituents with each other.

主权项

1. A method of making a curable composition, comprising, as constituents,
a polymer (A) having one or more reactive silicon groups on average per molecule thereof, the reactive silicon group(s) being (each) a group which can be crosslinked by forming a siloxane bond, wherein the reactive silicon group(s) present in the polymer (A) is/are (each) a reactive silicon group represented by the general formula (2):
—SiR33-bYb  (2) wherein R3 or R3s, the number of which is (3-b), is/are (each independently) a hydrocarbon group having 1 to 20 carbon atoms, Y or Ys, the number of which is b, is/are (each independently) at least one selected from the group consisting of a hydroxyl group, an alkoxy group, an alkenyloxy group, an acyloxy group, a phenoxy group, and a siloxy group represented by R23SiO— wherein three R2s are each independently a hydrocarbon group having 1 to 20 carbon atoms, and b is any one of 1, 2 and 3; BF3 and/or derivative thereof, and the amount thereof is from 0.5 to 2 parts by weight based on 100 parts by weight of the polymer (A); an amine heterocyclic compound, and the amount thereof is from 0.1 to 10 parts by weight based on 100 parts by weight of the polymer (A); vinyltrimethoxysilane, and the amount thereof is from 1 to 10 parts by weight based on 100 parts by weight of the polymer (A); and surface treated colloidal calcium carbonate and/or titanium oxide, and the amount thereof is from 10 to 200 parts by weight based on 100 parts by weight of the polymer (A), and; wherein at least the polymer (A) having one or more reactive silicon groups and/or the vinyltrimethoxysilane, and the BF3 and/or derivative thereof are mixed with each other in advance, and then mixing this mixture with other constituent(s) containing at least the surface treated colloidal calcium carbonate and/or titanium oxide.