摘要:
A primer composition usable for steel sheet and plastic sheet in vehicle bodies consists mainly of a polycaprolactone graft polymer obtained by graft-polymerizing a styrene-butadiene-styrene block copolymer or its hydrogenated polymer with a ring-opened polymer of .epsilon.-caprolactone and having a grafting ratio of the ring-opened polymer within a range of 0.5.about.50% by weight.
摘要:
A primer composition usable for steel sheet and plastic sheet in vehicle bodies consists essentially of a component A composed of a resin obtained by graft-polymerizing a styrene-butadiene-styrene block copolymer or its hydrogenated polymer with .alpha.,.beta.-unsaturated carboxylic acid or its anhydride, a component B of a crosslinking agent and a component C of an epoxy compound, and has particular weight ratios as solid content of component A to component B and components A+B to component C.
摘要:
A primer composition for olefin resins is disclosed, comprising Components (A) and (B):(A): a resin having an acid group prepared by graft polymerizing .alpha.,.beta.-unsaturated carboxylic acid or its anhydride onto a styrene-butadiene-styrene block copolymer or its hydrogenated product.(B): an organic solvent capable of dissolving the resin of Component (A).
摘要:
An photo-curable sealing agent composition comprising (A) an unsaturated group-containing urethane resin having a number average molecular weight of 1,000-100,000 and an unsaturation degree of 0.1-1 mol/kg, which is obtained by reaction of (a) a polycarbonate diol having a number average molecular weight of 500-3,000, (b) a bifunctional epoxy (meth)acrylate having two hydroxyl groups and two ethylenically unsaturated groups, and (c) a polyisocyanate; (B) a (meth)acrylic acid ester monomer, wherein an alcohol residue, ester-bonded with an (meth)acyloyl group, is a hydrocarbon group which may contain an oxygen atom, and has 1-20 carbon atoms and a molecular weight of not larger than 1,000; and (C) a photo-polymerization initiator. The sealing agent composition exhibits a high curability performance and gives a cured product having a low hardness and enhanced flexibility and elongation, and improved physical and mechanical strength and enhanced durability.
摘要:
A process of purifying maleic anhydride graft polyolefin comprising the steps of adding an aqueous solution of alkali initial hydroxide to a solution of maleic anhydride graft polyolefin containing unreacted maleic anhydride which is dissolved in an organic solvent at a temperature from 80.degree. C. to 160.degree. C., thereby precipitating maleic anhydride graft polyolefin particles to make a W/O emulsion; stirring the W/O emulsion while maintaining the temperature at a same temperature as above for less than 2 hours, thereby selectively forming the alkali metal salt of unreacted maleic anhydride; adding the aqueous solution of alkali metal hydroxide to the W/O emulsion to convert the W/O emulsion into an O/W emulsion; separating the maleic anhydride draft polyolefin particles, and washing the maleic anhydride graft polyolefin particles with water.
摘要:
An photo-curable sealing agent composition comprising (A) an unsaturated group-containing urethane resin having a number average molecular weight of 1,000-100,000 and an unsaturation degree of 0.1-1 mol/kg, which is obtained by reaction of (a) a polycarbonate diol having a number average molecular weight of 500-3,000, (b) a bifunctional epoxy (meth)acrylate having two hydroxyl groups and two ethylenically unsaturated groups, and (c) a polyisocyanate; (B) a (meth)acrylic acid ester monomer, wherein an alcohol residue, ester-bonded with an (meth)acyloyl group, is a hydrocarbon group which may contain an oxygen atom, and has 1-20 carbon atoms and a molecular weight of not larger than 1,000; and (C) a photo-polymerization initiator. The sealing agent composition exhibits a high curability performance and gives a cured product having a low hardness and enhanced flexibility and elongation, and improved physical and mechanical strength and enhanced durability.
摘要:
An epoxy resin composition for powder coatings which comprises (a) 40 to 95 parts by weight of a solid epoxy resin having at least two epoxy groups in a molecule, an epoxy equivalent of 400 to 2500, and a softening point of 50.degree. C. to 150.degree. C., and (b) 5 to 60 parts by weight of an epoxidized polydiene polymer having a main structure of general Formula (I) in which aliphatic double bonds are partially epoxidized. Formula (I) is(A--B--Ap)n--Yr--(Aq--B)m (I)in which Y is a coupling agent, a monomer for coupling, or an initiator, A is a polymer block selected from a homopolymer block of a conjugated diolefine monomer, a copolymer block of a conjugated diolefine monomer, a copolymer block composed of a conjugated diolefine monomer and an aromatic hydrocarbon monomer having one alkenyl group, B is a polymer block selected from a homopolymer block of an aromatic hydrocarbon monomer having one alkenyl group or a copolymer block thereof, or a copolymer block composed of an aromatic hydrocarbon having one alkenyl group and a conjugated diolefine monomer, n is not less than 0, r is 0 or 1, and m is 0 or more, the total of n and m is 1 to 100, and p and q are 0 or 1).