The invention relates to a copolymer of ethylene and of a 1,3-diene of formula CH.sub.2═CR—CH═CH.sub.2, which copolymer bears a silanol or alkoxysilane function, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer improves the compromise between the content of ethylene in the polymer, its crystallinity and the stiffness of a rubber composition containing it.

The present disclosure provides a composition. In an embodiment, the composition is an ethylene-based polymer composition formed by high pressure (greater or equal to 100 MPa) free radical polymerization. The ethylene-based polymer composition includes ethylene monomer and a mixture of hydroxyl-terminated polybutadiene molecules (PB-OH). Each PB-OH molecule includes internal alkene groups and terminal alkene groups. Each PB-OH molecule has more internal alkene groups than terminal alkene groups.

The present disclosure provides a composition. In an embodiment, the composition is an ethylene-based polymer composition formed by high pressure (greater or equal to 100 MPa) free radical polymerization. The ethylene-based polymer composition includes ethylene monomer and a mixture of hydroxyl-terminated polybutadiene molecules (PB-OH). Each PB-OH molecule includes internal alkene groups and terminal alkene groups. Each PB-OH molecule has more internal alkene groups than terminal alkene groups.

A terpolymer of ethylene, of a first 1,3-diene having from 4 to 6 carbon atoms and of a second 1,3-diene of formula CH.sub.2═CR-CH═CH.sub.2 is provided. The terpolymer contains more than 50 mol % of ethylene units and at least 1 mol % of units of the second 1,3-diene, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a polymer gives an improved compromise between its ethylene content, its stiffness and its degree of crystallinity for use in tires.

A terpolymer of ethylene, of a first 1,3-diene having from 4 to 6 carbon atoms and of a second 1,3-diene of formula CH.sub.2═CR-CH═CH.sub.2 is provided. The terpolymer contains more than 50 mol % of ethylene units and at least 1 mol % of units of the second 1,3-diene, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a polymer gives an improved compromise between its ethylene content, its stiffness and its degree of crystallinity for use in tires.

A terpolymer of ethylene, of a first 1,3-diene having from 4 to 6 carbon atoms and of a second 1,3-diene of formula CH.sub.2═CR-CH═CH.sub.2 is provided. The terpolymer contains more than 50 mol % of ethylene units and at least 1 mol % of units of the second 1,3-diene, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a polymer gives an improved compromise between its ethylene content, its stiffness and its degree of crystallinity for use in tires.

An adhesive sheet utilizes an acrylic resin composition without using a separate primer layer, thus providing excellent adhesion, high reliability due to its excellent light resistance under the sunlight exposure, and excellent elastic modulus, and can be easily used as an adhesive material in various fields such as building materials and automobiles.

An adhesive sheet utilizes an acrylic resin composition without using a separate primer layer, thus providing excellent adhesion, high reliability due to its excellent light resistance under the sunlight exposure, and excellent elastic modulus, and can be easily used as an adhesive material in various fields such as building materials and automobiles.

An adhesive composition made from an elastomer and a tackifying resin. The tackifying resin includes a farnesene polymer or copolymer having the following properties: i) less than 10 weight percent of volatile organic compounds; ii) Mn between 300 Da and 1000 Da; iii) Mw between 400 Da and 3000 Da; iv) Mw/Mn between 1.00 and 3.00; v) Tg between −50° C. and 20° C.; and vi) viscosity between 400,000 cP and 1,000,000 cP at 25° C. A method of making the farnesene-based polymer or copolymer includes combining a farnesene monomer and a solvent and optionally adding one or more co-monomers selected from dienes, branched mono-olefins, and vinyl aromatics, to provide a monomer feed, and polymerizing the monomer feed by combining it with a Friedel-Crafts initiator in a vessel. The farnesene-based polymer or copolymer tackifier may be combined with one or more elastomers and one or more other tackifiers to form an adhesive composition.

An adhesive composition made from an elastomer and a tackifying resin. The tackifying resin includes a farnesene polymer or copolymer having the following properties: i) less than 10 weight percent of volatile organic compounds; ii) Mn between 300 Da and 1000 Da; iii) Mw between 400 Da and 3000 Da; iv) Mw/Mn between 1.00 and 3.00; v) Tg between −50° C. and 20° C.; and vi) viscosity between 400,000 cP and 1,000,000 cP at 25° C. A method of making the farnesene-based polymer or copolymer includes combining a farnesene monomer and a solvent and optionally adding one or more co-monomers selected from dienes, branched mono-olefins, and vinyl aromatics, to provide a monomer feed, and polymerizing the monomer feed by combining it with a Friedel-Crafts initiator in a vessel. The farnesene-based polymer or copolymer tackifier may be combined with one or more elastomers and one or more other tackifiers to form an adhesive composition.