Abrasion resistant polyurethane article having a high rolling coefficient of friction
AssigneeWestinghouse Electric Corp.
InventorsMorris A. Mendelsohn, Carl P. Izzo
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Abstract
An abrasion resistant traction article is made, comprising a cured, high traction, extended polyurethane composition, comprising the cured reaction product of: (1) 100 parts of a prepolymer made from polyoxytetramethylenediol, polyoxyisopropylenediol and tolylene diisocyanate and (2) 8.0 parts to 10.0 parts of methylene bis(o-chloroaniline), acting as a chain extender.
Claims11
An abrasion resistant, traction article, comprising a cured, high traction, extended polyurethane composition consisting essentially of the cured reaction product of:
- (1) 100 parts of an isocyanate terminated prepolymer consisting essentially of the reaction product of:
- (A) 100 parts of a diol admixture consisting of about 60 weight percent to about 85 weight percent of polyoxytetramethlenediol and about 15 weight percent to about 40 weight percent of polyoxyisopropylenediol, and
- (B) about 14 parts to about 17 parts of toluene diisocyanate, and
- (2) 8.0 parts to 10.0 parts of methylene bis(O-chloroaniline acting as a chain extender.
An abrasion resistant, traction roller, comprising a metal hub, the outer circumference of which is covered with a cured, abrasion resistant, high traction, extended polyurethane composition wheel consisting essentially of the cured reaction product of:
- (1) 100 parts of an isocyanate terminated prepolymer, having an isocyanate equivalent weight of between about 1,350 and about 1,600, consisting of the reaction product of:
- (A) 100 parts of a diol admixture consisting of about 60 weight percent to about 85 weight percent of polyoxytetramethylenediol and about 15 weight percent to about 40 weight percent of polyoxyisopropylenediol, and
- (B) about 14 parts to about 17 parts of toluene diisocyanate, and
- (2) 8.0 parts to 10.0 parts of methylene bis(O-chloroaniline) acting as a chain extender, said cured polyurethane composition characterized by a Shore A hardness of about 78 to 84.
A method of making an abrasion resistant, high traction roller, comprising a metal hub, the outer circumference of which is covered with an abrasion resistant, high traction, extended polyurethane composition wheel, comprising the following steps:
- (1) mixing:
- (A) 100 parts of an isocyanate terminated prepolymer, having an isocyanate equivalent weight of between about 1,350 and 1,600, consisting essentially of the reaction product of:
- (i) 100 parts of a diol mixture consisting of about 60 weight percent to about 85 weight percent of polyoxytetramethylenediol and about 15 weight percent to about 40 weight percent of polyoxyisopropylenediol, and
- (ii) about 14 parts to about 17 parts of toluene diisocyanate, added in an inert atmosphere, and
- (B) 8.0 parts to 10.0 parts of methylene bis(O-chloroaniline) acting as a chain extender, to form an extended, reactive, fluid polyurethane composition,
- (2) inserting a metal wheel hub into a wheel mold,
- (3) pouring the extended polyurethane composition around the circumference of the metal hub in the mold,
- (4) heating the hub and the reactive polyurethane composition for about 1 hour to 3 hours, at about 80.degree. C. to about 100.degree. C., in the mold, to form a hub with a solid polyurethane tire around its circumference.
Dependencies are inferred from the claim text.