Abstract:
[Problem] There is provided a curable composition having satisfactory curability and adhesion by use of a non-tin curing catalyst, and minimizing lowering of mechanical properties of a cured article obtained after storing. [Means to Solve] A one-component type curable composition comprising (A) a polyoxyalkylene polymer (a1) having a silicon-containing group being capable of crosslinking by forming siloxane bonds and/or a (meth)acrylate polymer (a2) having a silicon-containing group being capable of crosslinking by forming siloxane bonds, (B) a chelate type methyl titanate (b1) and/or a chelate type ethyl titanate (b2), and (C) a compound having, in its molecule, a hydrolyzable silicon group and a nitrogen-substituted group.
Abstract:
[Problem] There is provided a curable composition having satisfactory curability and adhesion by use of a non-tin curing catalyst, and minimizing lowering of mechanical properties of a cured article obtained after storing. [Means to Solve] A one-component type curable composition comprising (A) a polyoxyalkylene polymer (a1) having a silicon-containing group being capable of crosslinking by forming siloxane bonds and/or a (meth)acrylate polymer (a2) having a silicon-containing group being capable of crosslinking by forming siloxane bonds, (B) a chelate type methyl titanate (b1) and/or a chelate type ethyl titanate (b2), and (C) a compound having, in its molecule, a hydrolyzable silicon group and a nitrogen-substituted group.
Abstract:
The invention provides a primer composition excellent in adhesion to porous substrates and a method of bonding, particularly, a primer composition characterized by containing (A) a vinyl copolymer obtained by copolymerizing a monomer component essentially comprising (a) 5 to 80 wt% of a monomer having a silicon-containing group which bears a hydroxyl or hydrolyzable group bonded to the silicon atom and causes crosslinking via the formation of a siloxane linkage and (b) 20 to 95 wt% of an alkyl (meth)acrylate monomer wherein the alkyl has 1 to 8 carbon atoms and (B) a vinyl copolymer obtained by copolymerizing a monomer component essentially comprising (a) 5 to 80 wt% of a monomer having a silicon-containing group which bears a hydroxyl or hydrolyzable group bonded to the silicon atom and causes crosslinking via the formation of a siloxane linkage and (c) 20 to 95 wt% of an alkyl (meth)acrylate monomer wherein the alkyl has 10 or more carbon atoms; and a method of bonding a sealant to a substrate, characterized by applying the primer composition onto a substrate and then making a sealant adhere to the resulting coated surface of the substrate.
Abstract:
A curable resin composition of the present invention contains 1 to 100 parts by mass of a polymer fine particle (B) relative to 100 parts by mass of an epoxy resin (A), wherein the polymer fine particle has a core-shell structure, the core layer of the polymer fine particle is diene rubber, the content of the epoxy group of the polymer fine particle (B) is 0.01 to 0.15 mmol/g. A curable resin composition (I) of the first embodiment contains 0.5 to 30 parts by mass of fumed silica as an inorganic filler (C). In addition, a curable resin composition (II) of the second embodiment contains bisphenol A epoxy resin and rubber-modified epoxy resin and/or urethane-modified epoxy resin as the epoxy resin (A).
Abstract:
The present invention provides a bonded structure that includes a wood material and a curable composition prepared from a reactive silyl group-containing polymer and that has high strength and boiling water resistance. The reactive silyl group-containing polymer is an environmentally friendly material having less toxicity. The use of a reactive silyl group-containing organic polymer containing a (meth)acrylate polymer and a polyoxyalkylene polymer with specific structures provides a curable composition having high strength and a high modulus, leading to the formation of a bonded structure including the composition and a wood material, which is excellent in strength and boiling water resistance. Thus, the above problem can be solved.
Abstract:
The present invention provides a curable composition useful as a contact adhesive which has a high rate of initial tack development, high tack strength, and long retention time of the developed tack. The curable composition includes an organic polymer (Q) containing a reactive silyl group, and a linear organic polymer (P) having a number average molecular weight larger than that of the polymer (Q) and having a reactive silyl group containing three hydrolyzable groups at only one terminal. The organic polymer (P) and the organic polymer (Q) are mixed at a mixing ratio (P):(Q), in terms of parts by weight, of 60:40 to 5:95.