Clear, resilient polyurethane elastomers
AssigneeUniroyal Chemical Company, Inc.
InventorThomas H. Peter
Life of this patent
Estimating the term…
Abstract
A polyurethane elastomer is disclosed that comprises the reaction product of: A) a prepolymer of at least one diisocyanate and at least one polyether polyol selected from the group consisting of a homopolymer of ethylene oxide, a homopolymer of propylene oxide, and a copolymer of ethylene oxide and propylene oxide, wherein free diisocyanate has been reduced to a level of less than 1% of the prepolymer; B) at least one alkylated8 aromatic diamine in a quantity sufficient to react with about 50% to about 105% of the available isocyanate content in the prepolymer; and C) at least one catalyst in a quantity sufficient to reduce the pot life to no more than two minutes; whereby said elastomer possesses high resilience and clarity and can be processed safely and at low cost.
Claims19
A polyurethane elastomer comprising the reaction product of:
- A) a prepolymer consisting essentially of the reaction product of toluene diisocyanate and one or more polyether polyols having a number average molecular weight in the range of from about 500 to about 6000 consisting essentially of a homopolymer of propylene oxide or a copolymer of ethylene oxide and propylene oxide, wherein free toluene diisocyanate has been reduced to a level of less than 1% of the prepolymer;
- B) at least one alkylated aromatic diamine in a quantity sufficient to react with about 50% to about 105% of the available isocyanate content in the prepolymer;
- and
- C) at least one organic acid catalyst in a quantity sufficient to reduce the pot life to no more than two minutes;
- whereby said elastomer possesses high resilience and clarity and can be processed safely and at low cost.
An article of manufacture comprising a polyurethane elastomer comprising the reaction product of:
- A) a prepolymer consisting essentially of the reaction product of toluene diisocyanate and one or more polyether polyols having a number average molecular weight in the range of from about 500 to about 6000 consisting essentially of a homopolymer of propylene oxide or a copolymer of ethylene oxide and propylene oxide, wherein free toluene diisocyanate has been reduced to a level of less than 1% of the prepolymer;
- B) at least one alkylated aromatic diamine in a quantity sufficient to react with about 50% to about 105% of the available isocyanate content in the prepolymer;
- and
- C) at least one organic acid catalyst in a quantity sufficient to reduce the pot life to no more than two minutes;
- whereby said article possesses high resilience and clarity and can be manufactured safely and at low cost.
A method of making an article of manufacture comprising molding a mixture comprising:
- A) a prepolymer consisting essentially of the reaction product of toluene diisocyanate and one or more polyether polyols having a number average molecular weight in the range of from about 500 to about 6000 consisting essentially of a homopolymer of propylene oxide or a copolymer of ethylene oxide and propylene oxide, wherein free toluene diisocyanate has been reduced to a level of less than 1% of the prepolymer;
- B) at least one alkylated aromatic diamine in a quantity sufficient to react with about 50% to about 105% of the available isocyanate content in the prepolymer;
- and
- C) at least one organic acid catalyst in a quantity sufficient to reduce the pot life to no more than two minutes;
- whereby said article possesses high resilience and clarity and can be manufactured safely and at low cost.
Dependencies are inferred from the claim text.