Adhesion promoter for cord-reinforced rubber and metal or polymer substrate/rubber composites
AssigneeThe C.P. Hall Company
InventorsGary Wentworth, Stephen O'Rourke, Kimberly L. Stefanisin, John English
Life of this patent
Estimating the term…
Abstract
A rubber composition including a natural or synthetic rubber, and an adhesive resin capable of unexpected adhesion to metal, polymer and glass substrates, particularly cords in radical tires, hoses, conveyor belts, transmission belts, and the like by the addition of long chain esters, including mono, di- and tri-esters.
Claims46
A rubber composition comprising rubber selected from the group consisting of natural rubber, synthetic rubber, and a combination thereof;
- and an adhesion promoter containing (1) an adhesive resin in an amount of about 0.1% to about 15% by weight, based on the weight of rubber in the composition;
- and (2) an ester having formula I, II, III, IV or a combination of any two or more of said esters in an amount of about 0.1% to about 15% by weight, based on the weight of rubber in the composition:
- 15
- wherein R1 is a C3-C24 alkyl radical, straight chain or branched, saturated or unsaturated containing 1 to 3 carbon-to-carbon double bonds;
- R2 is a C3-C24 saturated fatty acid residue, or an unsaturated fatty acid residue having 1 to 6 carbon-to-carbon double bonds;
- 16
- wherein n=3-24, and R3 and R4, same or different, are a C3-C24 alkyl radical, straight chain or branched, saturated or unsaturated containing 1 to 3 carbon-to-carbon double bonds;
- 17
- wherein R5 and R7, same or different, are a C3-C24 hydrocarbon chain, straight chain or branched, either saturated or having 1 to 6 carbon-to-carbon double bonds;
- R6 and R8, same or different, are C3-C24 alkyl radical, straight chain or branched, saturated or unsaturated containing 1 to 3 carbon-to-carbon double bonds;
- and
- R10 and R11, same or different, are a C3-C24, saturated hydrocarbon chain, straight chain or branched;
- or an unsaturated C3-C24, hydrocarbon chain, straight chain or branched, having 1 to 6, carbon-to-carbon double bonds;
- 18
- wherein R12, R14 and R18, same or different, are a C3-C24, hydrocarbon chain, straight chain or branched, either saturated or having 1 to 6 carbon-to-carbon double bonds;
- R13, R15 and R19, same or different, are a C3-C24 alkyl radical, straight chain or branched, saturated or unsaturated containing 1 to 3 carbon-to-carbon double bonds;
- and
- R16, R17 and R20, same or different, are a C3-C24 saturated hydrocarbon chain, straight chain or branched;
- or unsaturated C3-C24 hydrocarbon chain, straight chain or branched, containing 1 to 6 carbon-to-carbon double bonds.
A method of increasing the adhesion of a rubber composition to a polymer, glass, or metal substrate, said rubber composition including a natural or synthetic rubber, a rubber vulcanizing agent, and an adhesive resin, comprising adding to said rubber composition, in an amount of about 0.1% to 15% by weight, based on the weight of the rubber, an ester having formula I, II, III, IV, or mixtures thereof:
- 32
- wherein R is a C3-C24 alkyl radical, straight chain or branched, saturated or unsaturated containing 1 to 3 carbon-to-carbon double bonds;
- R2 is a C3-C24 saturated fatty acid residue, or an unsaturated fatty acid residue having 1 to 6 carbon-to-carbon double bonds;
- 33
- wherein n=3-24 and R3 and R4, same or different, are a C3-C24 alkyl radical, straight chain or branched;
- 34
- wherein R5 and R7, same or different, are a C3-C24 hydro carbon chain, straight chain or branched, either saturated or having 1 to 6 carbon-to-carbon double bonds;
- R6 and R8, same or different, are a C3-C24 alkyl radical, straight chain or branched;
- and
- R10 and R11, same or different, are a C3-C24, saturated hydrocarbon chain, straight chain or branched;
- or an unsaturated C3-C24, hydrocarbon chain, straight chain or branched, having 1 to 6 carbon-to-carbon double bonds;
- 35
- wherein R12, R14 and R18, same or different, are a C3-C24hydrocarbon chain, straight chain or branched, either saturated or having 1 to 6 carbon-to-carbon double bonds;
- R13, R15 and R19, same or different, are C3-C24 alkyl radical, straight chain or branched, saturated or unsaturated containing 1 to 3 carbon-to-carbon double bonds;
- and
- R16, R17 and R20, same or different, are C3-C24 saturated hydrocarbon chain, straight chain or branched;
- or unsaturated C3-C24 hydrocarbon chain, straight chain or branched, containing 1 to 6 carbon-to-carbon double bonds.
Dependencies are inferred from the claim text.