Back to results
US 6,747,117 B2Granted
Polyurethane/urea composition for coating cylindrical parts
AssigneeCrompton Corporation
InventorVincent J. Gajewski
Life of this patent
Estimating the term…
Abstract
A polyurethane composition is disclosed that comprises an isocyanate-terminated polyurethane prepolymer, and a curative agent including a polyaspartic ester. Desirably, the curative agent includes a co-curative selected from the group consisting aromatic diamines and diols. This composition is useful for rotationally casting cylindrical parts. The invention includes the method for coating a cylindrical object.
Claims19
A polyurethane composition comprising:
- A) an isocyanate-terminated polyurethane prepolymer comprising the reaction product of a polyol or polyol blend and an organic diisocyanate monomer selected from the group consisting of 2,4-toluene diisocyanate;
- 2,6-toluene diisocyanate:
- 4,4′-diisocyanatodiphenylmethane;
- p-phenylene-diisocyanate:
- diphenyl-4,4′-diisocyanate:
- dibenzyl-4,4′-diisocyanate;
- stilbene-4,4′-diisocyanate:
- benzophenone-4,4′-diisocyanate;
- 1,3- and 1,4-xylene diisocyanates;
- 1,6-hexamethylene diisocyanate;
- 1,3-cyclohexyl diisocyanate;
- 1,4-cyclohexyl diisocyanate;
- H(12)MDI;
- isophorone diisocyanate;
- and mixtures of the foregoing;
- B) a curative comprising a polyaspartic ester;
- and
- C) an aromatic diamine co-curative agent.
15 more elements
A method for coating a cylindrical object which comprises applying to the cylindrical object an effective amount of a polyurethane composition comprising:
- A) an isocyanate-terminated polyurethane prepolymer comprising the reaction product of a polyol or polyol blend and an organic diisocyanate monomer selected from the group consisting of 2,4-toluene diisocyanate;
- 2,6-toluene diisocyanate:
- 4.4′-diisocyanatodiphenylmethane;
- o-phenylene-diisocyanate;
- diphenyl-4,4′-diisocyanate;
- dibenzyl-4.4′-diisocyanate;
- stilbene-4,4′-diisocyanate:
- benzophenone-4,4′-diisocyanate;
- 1,3- and 1,4-xylene diisocyanates;
- 1,6-hexamethylene diisocyanate;
- 1,3-cyclohexyl diisocyanate:
- 1,4-cyclohexyl diisocyanate;
- H(12)MDI;
- isophorone diisocyanate;
- and mixtures of the foregoing;
- B) a curative agent comprising a polyaspartic ester;
- and
- C) an aromatic diamine co-curative agent.
15 more elements
Dependencies are inferred from the claim text.