A rubber composition is, in particular, suitable for producing a sealing part for a high pressure hydrogen apparatus having excellent low temperature sealing properties and blister resistance, and the sealing part for a high pressure hydrogen apparatus is obtained by using the rubber composition. A rubber composition includes an ethylene/butene/ethylidene norbornene terpolymer (EBENB), and the rubber composition is for use in producing a sealing part for a high pressure hydrogen apparatus.

Provided is a benzotriazole compound that efficiently absorbs ray having a long wavelength of 360-400 nm, i) having excellent solubility in a monomer of a resin raw material, being dissolvable at a high concentration, polymerizing at excellent reactivity, and yielding a high-molecular-weight resin member and a transparent resin member, or ii) having exceptional heat resistance. This benzotriazole compound is represented by formula (I), where at least one of R.sup.1-R.sup.9 is represented by formula (i-1), (where R.sup.10 and R11 are hydrocarbon groups, etc., and R.sup.12 is represented by formula (i-2) or formula (i-3) (in formula (i-2), A.sup.1 represents a divalent group selected from nitrogen-Containing groups, oxygen-containing groups, sulfur-containing groups, phosphorus-containing groups, and phenylene groups, and R.sup.12a-R.sup.12c and X represent hydrocarbon groups, etc.; and in formula (i-3), A.sup.2 represents a divalent group selected from nitrogen-containing groups, oxygen-containing groups, sulfur-containing groups, and phosphorus-containing groups, and X.sup.a and X.sup.b represent hydrocarbon groups, etc.)).

Provided is a benzotriazole compound that efficiently absorbs ray having a long wavelength of 360-400 nm, i) having excellent solubility in a monomer of a resin raw material, being dissolvable at a high concentration, polymerizing at excellent reactivity, and yielding a high-molecular-weight resin member and a transparent resin member, or ii) having exceptional heat resistance. This benzotriazole compound is represented by formula (I), where at least one of R.sup.1-R.sup.9 is represented by formula (i-1), (where R.sup.10 and R11 are hydrocarbon groups, etc., and R.sup.12 is represented by formula (i-2) or formula (i-3) (in formula (i-2), A.sup.1 represents a divalent group selected from nitrogen-Containing groups, oxygen-containing groups, sulfur-containing groups, phosphorus-containing groups, and phenylene groups, and R.sup.12a-R.sup.12c and X represent hydrocarbon groups, etc.; and in formula (i-3), A.sup.2 represents a divalent group selected from nitrogen-containing groups, oxygen-containing groups, sulfur-containing groups, and phosphorus-containing groups, and X.sup.a and X.sup.b represent hydrocarbon groups, etc.)).

The present invention is directed to a functionalized elastomer, wherein the functionalized elastomer is a copolymer of a first monomer and a second monomer, the first monomer selected from the group consisting of conjugated diene monomers and vinyl aromatic monomers, and the second monomer of formula 1 ##STR00001##
wherein R.sub.1=C1-C8 alkyl, aryl, substituted aryl, or SiR.sub.3 where R.sub.3 are independently C1-C8 alkyl; R.sub.2=C1-C8 alkyl, aryl, or substituted aryl, or SiR.sub.3; and n=0-3.

Polymers comprising fluorinated side chains that can be used for water resistance coatings on substrates and are deposited by initiated chemical vapor deposition are generally described.

Butyl based composition having hydrocarbon resins are provided herein. The hydrocarbon resin has a Tg from 10 C. to 25 C., a number average molecular weight between 20 to 500, a weight average molecular weight between about 100 to about 2000, and a glass transition temperature between about 0 C. to about 80 C.

A composition for seeded polymerization includes: a compound having dithioate; a mercaptan compound; an aromatic vinyl monomer; and a conjugated diene monomer.

According to an embodiment of the present invention, there is provided a method of preparing a copolymer which includes (a) polymerizing an aromatic vinyl monomer and a conjugated diene-based monomer in the presence of a solvent, a first randomizing agent, and a catalyst to prepare a first copolymer including the aromatic vinyl monomer in an amount of 15 to 40 wt %; and (b) reacting the first copolymer with one or more of a second randomizing agent different from the first randomizing agent and an additional aromatic vinyl monomer to prepare a second copolymer.

The invention is directed to a rubber composition comprising a block copolymer of a conjugated diene monomer and benzofulvene, and a pneumatic tire comprising the rubber composition.

A process for preparing a random copolymer based on at least one acyclic diene monomers and on at least one cyclic diene monomer is provided. The process comprises a step of copolymerization, in the presence of a polar agent and an anionic initiator in a polymerization solvent, of at least one acyclic diene monomer and of at least one cyclic diene monomer of which one CC double bond is endocyclic and conjugated to an exocyclic CC double bond, at a polymerization temperature below 80 C. A molar ratio of the polar agent/function(s) of the anionic initiator capable of initiating anionic polymrization being greater than 0.1.

Copolymers based on at least one acyclic diene monomer and on at least one cyclic diene monomer and the compositions containing them are also provided.