Power transmission belt
AssigneeThe Gates Corporation
InventorYuding Feng
Life of this patent
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Abstract
A power transmission belt or hose or other dynamic article with an elastomeric body comprising a rubber composition that includes an ionomeric polymer additive, such as an ethylene-methacrylic acid copolymer or a butyl ionomer. The rubber body exhibits improved crack growth resistance over the same body composition without the ionomer additive.
Claims5
A power transmission belt comprising an elastomeric belt body, said body comprising a rubber composition comprising an ionomeric polymer additive;
- wherein said ionomeric polymer additive comprises polyethylene-methacrylic acid random copolymer wherein said polyethylene-methacrylic acid copolymer has at least a portion of its acid groups neutralized.
A power transmission belt comprising an elastomeric body, said body comprising a rubber composition comprising an ionomeric polymer additive;
- wherein said ionomeric polymer additive comprises polyethylene-methacrylic acid random copolymer with at least a portion of its acid groups neutralized;
- and wherein said ionomeric polymer additive is present in said rubber composition at a concentration of up to 50 phr.
A method of increasing crack growth resistance in power transmission belts comprising a rubber body subject to flexing in use comprising:
- adding an ionomeric polymer additive to a rubber composition used to form said rubber body;
- wherein said ionomeric polymer additive comprises polyethylene-methacrylic acid random copolymer with at least a portion of its acid groups neutralized.
Dependencies are inferred from the claim text.