TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Group: The crosslinking functional group of vinyl polymer is crosslinking silyl group, alkenyl, hydroxyl, amino, group having polymerizable carbon-carbon double bond, or epoxy group. The crosslinking functional group is provided in molecular chain terminal of vinyl polymer. The crosslinking silyl group of polymers (I,II) is of formula: (Si(R1)2-b(Y')bO)m-Si(R2)3-a(Y')a or -SiY'3.R1,R2=1-20C alkyl, 6-20C aryl, 7-20C aralkyl or triorganosiloxy group ((R')3SiO);R'=1-20C hydrocarbyl;Y'=hydroxy or hydrolyzable group;a=0-3;b=0-2;m=0-19;anda+mb=1 or more.The polymers (I,II) preferably have average of 1.1-4 crosslinking functional groups. Preferred Composition: The curable composition further contains carboxylic acid metal salt and/or carboxylic acid, amine compound, titanium catalyst, organic tin catalyst, silicate and epoxy silane coupling agent. The carbon atom adjacent to carbonyl group in carboxylate ion of carboxylic acid metallic salt is tertiary carbon or quaternary carbon. The titanium catalyst is of formula: Ti(OR3)4 or of formulae (I,II). The content of organic tin catalyst is 0.01-0.5 parts weight with respect to 100 parts weight of total amount of polymers (I,II).R3=organic group;R7=1-20C optionally substituted bivalent hydrocarbyl;R4=1-20C optionally substituted hydrocarbyl;R5=H or 1-8C optionally substituted hydrocarbyl;A1,A2=-R6 or -OR6;R6=1-8C optionally substituted hydrocarbyl;andn=0-3.    TECHNOLOGY FOCUS - POLYMERS - Preferred Properties: The vinyl polymer has molecular weight distribution of less than 1.8 and number average molecular weight of 500-100000. Preferred Polymer: The vinyl polymer is obtained by polymerizing monomer chosen from (meth)acrylic type monomer, acrylonitrile type monomer, aromatic vinyl monomer, fluorine-containing vinyl monomer and silicon-containing vinyl monomer. The vinyl polymer is preferably (meth)acrylic-type polymer, acrylic-type polymer or acrylic acid ester polymer, and is manufactured by living radical polymerization or atom transfer radical polymerization. Preferred Composition: The curable composition further contains a polyether polymer (II) having average of at least one crosslinking functional group, preferably crosslinking silyl group, having number average molecular weight of 500-100000 and containing polypropylene oxide in principal chain.