Spray polyurethane elastomers and methods for producing the same
AssigneeBASF SE
InventorsLiying Wang, Brad J. Martin
Life of this patent
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Abstract
The present disclosure relates to spray polyether and polyester polyurethane elastomeric articles and associated methods of producing such elastomer articles. More specifically, the invention provides spray polyester polyurethane elastomer articles that exhibit excellent tensile and tear strength, superior elongation performance and improved abrasion resistance performance with tunable tensile modulus.
Claims37
A spray polyurethane elastomer, comprising:
- (a) an isocyanate functional urethane prepolymer derived from monomeric diphenylmethane diisocyanate (MMDI) and a polyol;
- and
- (b) an isocyanate-reactive component comprising:
- (i) a first polyol in an amount of about 60 to 98 parts by weight of the isocyanate-reactive component, wherein the first polyol is a polyol with a hydroxyl number of about 30 to about 200 mg KOH/g.
(canceled)
9-16. (canceled)
A method for making an elastomer composition, comprising the steps of:
- reacting an MMDI with a polyester polyol to form an isocyanate functional urethane prepolymer,
- blending a polyol to form an isocyanate-reactive component;
- and mixing the isocyanate prepolymer and the isocyanate-reactive component at about 100 isocyanate index to about 110 isocyanate index to form the polyurethane elastomer, wherein the first polyol in an amount of about 60 to 98 parts by weight of the isocyanate-reactive component, and the first polyol is a polyester polyol with a hydroxyl number of about 30 to about 200 mg KOH/g.
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A method for producing an article for consumer or industrial use wherein the article has superior functionality,
- wherein the article comprises one or more outer layers comprising an elastomer composition applied by spraying,
- wherein the one or more outer layers comprise the same or different elastomer compositions applied by one or more spray systems,
- and wherein the elastomer composition comprises the product of reacting an MMDI with a polyester polyol to form an isocyanate functional urethane prepolymer comprising blending a polyol to form an isocyanate-reactive component;
- and mixing the isocyanate prepolymer and the isocyanate-reactive component at about 100 isocyanate index to about 110 isocyanate index to form the polyurethane elastomer, wherein the first polyol in an amount of about 60 to 98 parts by weight of the isocyanate-reactive component, and the first polyol is a polyester polyol with a hydroxyl number of about 30 to about 200 mg KOH/g.
(canceled)
A spray polyurethane elastomer, comprising:
- (a) an isocyanate functional urethane prepolymer derived from monomeric diphenylmethane diisocyanate (MMDI) and a first polyol;
- and
- (b) an isocyanate-reactive component comprising:
- (i) a second polyol in an amount of about 60 to 98 parts by weight of the isocyanate-reactive component, wherein the second polyol is a polyol with a hydroxyl number of about 30 to about 200 mg KOH/g.
44-51. (canceled)
Dependencies are inferred from the claim text.