Process for producing rubber composition, process for producing vulcanized molded article of rubber composition, and process for producing vulcanized and foamed molded article of rubber composition
AssigneeSumitomo Chemical Company, Limited
InventorTakeshi Minaba
Life of this patent
Estimating the term…
Abstract
A process for producing a rubber composition, which comprises the step of kneading at least (A) 100 parts by weight of a pellet containing an ethylene-α-olefin-non-conjugated diene copolymer rubber, the pellet having a covering layer comprising a thermoplastic resin, (B) 10 to 200 parts by weight of a reinforcing material, and (C) 1 to 200 parts by weight of a softener; and a process for producing a vulcanized (further foamed) molded article of the rubber composition.
Claims15
A process for producing a rubber composition, which comprises the step of kneading at least:
- (A) 100 parts by weight of a pellet containing an ethylene-α-olefin-non-conjugated diene copolymer rubber, the pellet having a covering layer comprising a thermoplastic resin;
- (B) 10 to 200 parts by weight of a reinforcing material;
- and
- (C) 1 to 200 parts by weight of a softener.
A process for producing a vulcanized molded article of a rubber composition, which comprises the steps of:
- (1) kneading at least (A) 100 parts by weight of a pellet containing an ethylene-α-olefin-non-conjugated diene copolymer rubber, the pellet having a covering layer comprising a thermoplastic resin, (B) 10 to 200 parts by weight of a reinforcing material, and (C) 1 to 200 parts by weight of a softener, thereby producing a rubber composition;
- (2) kneading at least said rubber composition, (D) 0.1 to 10 parts by weight of a vulcanizing agent, and (E) 0.05 to 20 parts by weight of a vulcanization accelerator, thereby producing a kneaded product;
- (3) molding said kneaded product, thereby producing a molded article of the rubber composition;
- and
- (4) heating said molded article.
A process for producing a vulcanized and foamed molded article of a rubber composition, which comprises the steps of:
- (1) kneading at least (A) 100 parts by weight of a pellet containing an ethylene-α-olefin-non-conjugated diene copolymer rubber, the pellet having a covering layer comprising a thermoplastic resin, (B) 10 to 200 parts by weight of a reinforcing material, and (C) 1 to 200 parts by weight of a softener, thereby producing a rubber composition;
- (2) kneading at least said rubber composition, (D) 0.1 to 10 parts by weight of a vulcanizing agent, (E) 0.05 to 20 parts by weight of a vulcanization accelerator, and (F) 0.5 to 20 parts by weight of a foaming agent, thereby producing a kneaded product;
- (3) molding said kneaded product, thereby producing a molded article of the rubber composition;
- and
- (4) heating said molded article.
Dependencies are inferred from the claim text.