Disclosed is a photocurable elastomer composition that exhibits, when cured, excellent flexibility and barrier properties and has low compression set. The photocurable elastomer composition may comprise components (A) to (D) such that the mass ratio of the component (A) to the component (B) ((A):(B)) is from 25:75 to 75:25, and that the content of the component (C) is 50 mass % or less based on the total content of the components (A), (B), and (C).

A colored composition including a resin system, and a colorized filler. The colorized filler includes particles including a polymer. The particles have a density less than 2.6 g/cc and an average particle size from 100 microns to 600 microns.

The present invention relates to anaerobically curable (meth)acrylate compositions, and stabilizers for same.

An object of the present invention is to provide a curable composition that can be used as sealing materials, adhesives, and the like, has excellent curing properties, and gives a cured product excellent in elongation properties. The object can be attained by means of a curable composition comprising: a reactive silyl group-containing polyether polymer (A) that contains a reactive silyl group with high activity (e.g., (ClCH.sub.2)(CH.sub.3O).sub.2Si, (CH.sub.3OCH.sub.2)(CH.sub.3O).sub.2Si, or CH.sub.3(CH.sub.3O).sub.2SiCH.sub.2NHC(O)); and a reactive silyl group-containing polyether polymer (B) that contains a reactive silyl group (e.g., CH.sub.3(CH.sub.3O).sub.2Si or (CH.sub.3O).sub.3Si) different from that mentioned above and/or a (meth)acrylic polymer (C) containing a reactive silyl group that is not particularly limited.

The present invention aims to provide an acrylic rubber composition capable of giving an acrylic rubber molded product good in low-friction properties and non-sticking properties. The present invention relates to an acrylic rubber composition containing an acrylic rubber (A) and a fluororesin (B), the fluororesin (B) being a perfluororesin.

An acrylic rubber contains (a) methyl methacrylate units, (b) ethyl acrylate units, (c) n-butyl acrylate units, (d) 2-methoxyethyl acrylate units, and (e) cross-linking site monomer units, in which the acrylic rubber contains 10 to 20% by weight of (a) the methyl methacrylate units, 15% by weight or less of (b) the ethyl acrylate units, 60 to 80% by weight of (c) the n-butyl acrylate units, 10 to 30% by weight of (d) the 2-methoxyethyl acrylate units, and 0.5 to 5% by weight of (e) the cross-linking site monomer units.

Anaerobic curable compositions, such as adhesives and sealants, containing blocked dicarboxylic acid compounds are provided. The blocked dicarboxylic acid compounds are labile dicarboxylic acid compounds having two acetal linkages, which cleave to release the underlying dicarboxylic acid during anaerobic cure. In this way, the dicarboxylic acid can participate in the anaerobic cure of the composition when the blocking group is released.

Disclosed is a sealant composition, a liquid crystal device and a method for preventing liquid crystal contamination using the sealant composition. The sealant composition consists of 20-30 parts by weight of an ultraviolet polymerizable double bond monomer, 15-20 parts by weight of a heat polymerization monomer, 5-20 parts by weight of a polymerizable oligomer, 0.1-5 parts by weight of a photoinitiator, 10-20 parts by weight of a heat curing agent and 0-20 parts by weight of a particulate additive, wherein said polymerizable oligomer is poly(ethylene glycol) diacrylate or derivatives thereof. Through the reaction between the polymerizable oligomers and the polymer of the ultraviolet polymerizable double bond monomers to generate a reticular high molecular polymer, the anchoring effect of the polymer on the surrounding unreacted heat polymerization monomers is effectively enhanced, thereby reducing the contamination of the crystal liquid by the sealant.

An acrylic rubber contains (a) methyl methacrylate units, (b) ethyl acrylate units, (c) n-butyl acrylate units, (d) 2-methoxyethyl acrylate units, and (e) cross-linking site monomer units, in which the acrylic rubber contains 10 to 20% by weight of (a) the methyl methacrylate units, 15% by weight or less of (b) the ethyl acrylate units, 60 to 80% by weight of (c) the n-butyl acrylate units, 10 to 30% by weight of (d) the 2-methoxyethyl acrylate units, and 0.5 to 5% by weight of (e) the cross-linking site monomer units.

The present invention relates to anaerobic curable compositions, such as adhesives and sealants, containing blocked acrylic acid compounds. The blocked acrylic acid compounds are labile (meth)acrylic acid compounds having an acetal linkage, which cleaves to release (meth)acrylic acid during anaerobic cure. In this way, the block acrylic acid compounds acts as an adhesion promoter thereby promoting adhesion to various substrates.