Rubber composition and a vulcanizing adhesion method using the same
AssigneeSumitomo Chemical Company, Limited
InventorsNaoki Inui, Hironobu Iyama, Kyoko Tsuta, Hideo Nagasaki
Life of this patent
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Abstract
A rubber composition (1) which comprises: a rubber (A) such as natural rubber, isoprene rubber and the like; a hydroxy flavan compound (B1) represented by the formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are hydrogen or an aliphatic group and X and Y are hydrogen hydroxy or an aliphatic group, such as 2,4,4-trimethyl-2',4',7-trihydroxyflavan (B2); and 2,2,4-trimethyl-1,2-dihydroquinoline polymer (C1) containing 1% or less by weight of a primary amine, 3% or less by weight of the monomer and 30% or more by weight of the dimer based on the total weight of the polymer, or a cromane compound (C2) which may be a novel cromane compound.
Claims13
A rubber composition (1) which comprises:
- 100 parts by weight of a rubber (A) selected from natural rubber, styrene-butadiene copolymer rubber, butadiene rubber, isoprene rubber, acrylonitrile-butadiene copolymer rubber, chloroprene rubber, butyl rubber and halogenated butyl rubber;
- 0.5 part or more by weight of a hydroxy flavan compound (B1) represented by the formula (I):
- ##STR10## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5, which may be the same or different, each represent hydrogen or an aliphatic group having 1-6 carbon atoms, or R.sup.1 and R.sup.2 together with the carbon atoms to which they are attached form an alicyclic ring having 4-10 carbon atoms, or R.sup.4 and R.sup.5 together with the carbon atom to which they are attached form an alicyclic ring having 4-10 carbon atoms, and X and Y, which may be the same or different, each represent a hydrogen atom, a hydroxy group or an aliphatic group having 1-8 carbon atoms;
- and
- 0. 5-5 parts by weight of a 2,2,4-trimethyl-1,2-dihydroquinoline polymer (C1) comprising 1% or less by weight of a primary amine, 3% or less by weight of the monomer and 30% or more by weight of the dimer based on the total weight of the polymer.
A vulcanization adhesion process which comprises compounding 0.5 part or more by weight of a hydroxy flavan compound (B1) represented by the formula (I):
- ##STR11## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5, which may be the same or different, each represent hydrogen or an aliphatic group having 1-6 carbon atoms, or R.sup.1 and R.sup.2 together with the carbon atoms to which they are attached form an alicyclic ring having 4-10 carbon atoms, or R.sup.4 and R.sup.5 together with the carbon atom to which they are attached form an alicyclic ring having 4-10 carbon atoms, and X and Y, which may be the same or different, each represent a hydrogen atom, a hydroxy group or an aliphatic group having 1-8 carbon atoms;
- and
- 0. 5-5 parts by weight of a 2,2,4-trimethyl-1,2-dihydroquinoline polymer (C1) containing 1% or less by weight of a primary amine, 3% or less by weight of the monomer and 30% or more by weight of the dimer based on total amount of the polymer;
- to
- 100 parts by weight of a rubber (A) selected from natural rubber, styrene-butadiene copolymer rubber, butadiene rubber, isoprene rubber, acrylonitrile-butadiene copolymer rubber, chloroprene rubber, butyl rubber and halogenated butyl rubber;
- and
- vulcanizing the resulting composition while contacting it with a reinforcing material.
Dependencies are inferred from the claim text.