Patent classifications
C
CHEMISTRY; METALLURGY
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C09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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C09K
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
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2200/00
Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
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C09K2200/06
Macromolecular organic compounds, e.g. prepolymers
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C09K2200/0615
obtained by reactions only involving carbon-to-carbon unsaturated bonds
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C09K2200/063

Method for producing statistical copolymer containing chloroprene monomer unit and unsaturated nitrile monomer unit, statistical copolymer, latex and use of same
11566087 · 2023-01-31 · ·

To provide a statistical copolymer containing a chloroprene monomer unit and an unsaturated nitrile monomer unit which has a satisfactory oil resistance. A method for producing a statistical copolymer containing a chloroprene monomer unit and an unsaturated nitrile monomer unit includes a step for conducting continuous addition or 10 cycles or more of intermittent portionwise addition of the chloroprene monomer after initiation of a polymerization reaction is provided. A rubber composition using a statistical copolymer according to the invention or a vulcanized molded article containing the rubber composition is excellent in terms of oil resistance, mechanical strength, compression set at a low temperature and flex fatigue resistance.

METHOD FOR PRODUCING STATISTICAL COPOLYMER CONTAINING CHLOROPRENE MONOMER UNIT AND UNSATURATED NITRILE MONOMER UNIT, STATISTICAL COPOLYMER, LATEX AND USE OF SAME
20200199260 · 2020-06-25 ·

To provide a statistical copolymer containing a chloroprene monomer unit and an unsaturated nitrile monomer unit which has a satisfactory oil resistance. A method for producing a statistical copolymer containing a chloroprene monomer unit and an unsaturated nitrile monomer unit includes a step for conducting continuous addition or 10 cycles or more of intermittent portionwise addition of the chloroprene monomer after initiation of a polymerization reaction is provided. A rubber composition using a statistical copolymer according to the invention or a vulcanized molded article containing the rubber composition is excellent in terms of oil resistance, mechanical strength, compression set at a low temperature and flex fatigue resistance.