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US 11,111,342 B2Granted
Polyurea-urethane cord treatment for power transmission belt and belt
AssigneeThe Gates Corporation
InventorsJoseph R. Duke, Jr., John Graeme Knox
Life of this patent
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Abstract
A belt with a tensile cord embedded in an elastomeric body, having a polyurea-urethane adhesive composition impregnating the cord and coating the fibers. The composition is reaction product of a polyurethane prepolymer and a diamine curative. The prepolymer is a reaction product of a compact, symmetric diisocyanate and a polyester, polyether, or polycarbonate polyol. The belt body may be of cast polyurethane, vulcanized rubber, or thermoplastic elastomer. The cord may have an adhesive overcoat.
Claims19
A power transmission belt comprising:
- an elastomeric body, and a tensile cord embedded in the elastomeric body;
- with the tensile cord impregnated with a polyurea-urethane composition different from said elastomeric body, said said polyurea-urethane composition consisting of the polyurea reaction product of:
- a polyurethane prepolymer;
- and
- a curative selected from the group consisting of diamines and water;
- said tensile cord obtained by impregnation with said polyurethane prepolymer and said curative, followed by reaction to form said polyurea reaction product, optionally in the presence of non-reactive ingredients.
3 more elements
Dependencies are inferred from the claim text.