Polyurethane foam

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

Reexamination Certificate

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C521S130000, C521S172000

Reexamination Certificate

active

08067479

ABSTRACT:
A microcellular polyurethane obtainable by reacting a polyisocyanate, a polyester formed from a dimer fatty acid and/or dimer fatty diol, and a chain extender. The foam is particularly suitable for use as a component of shoe soles.

REFERENCES:
patent: 2904184 (1959-09-01), Daley et al.
patent: 3264236 (1966-08-01), Santaniello
patent: 4155899 (1979-05-01), Lemper et al.
patent: 4602079 (1986-07-01), Vinches et al.
patent: 5840782 (1998-11-01), Limerkens et al.
Examination Report dated Apr. 26, 2010 for corresponding India Application No. 2180/DELNP/2004.
Britian, J. W. “Behavior of Isocyanate-Terminated Prepolymers in the Presence of Various Catalysts”I & EC Product Research and Development, 1:4 (Dec. 1962) 261-264.
Chang, Wen-Hsuan et al. “Advances in Polyurethane Coatings 91969 to Early 1972)”Ind. Eng. Chem. Prod. Res. Develop., 12:4 (1973) 278-288.
Frisch, Kurt C. et al. “Urethane Coatings”Applied Polymer Science(2ndEd.), Chapter 41 (1985) 985- 1029, ACS Symposium Series: American Chemical Society, vol. 285.
Papa, Anthony J. “Reactive Flame Retardants for Polyurethane Foams”Ind. Eng. Chem. Prod. Res. Develop., 9:4 (1970) 478-496.

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