Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Reexamination Certificate
2007-07-17
2007-07-17
Cooney, Jr., John M. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
C521S170000, C521S174000, C568S716000, C568S749000, C568S763000, C568S780000, C568S793000, C568S810000, C568S811000
Reexamination Certificate
active
10879473
ABSTRACT:
We describe a process for the preparation of polyurethane polyol from CARDANOL 3-(8pentadecenyl)phenol, derived from cashew nut shell liquid (CNSL), a renewable resource material. The polyol is made by oxidation with peroxy acid generated in situ to give epoxidised CARDANOL 3-(8-pentadecenyl)phenol and the epoxy derivative is converted to the polyol in the presence of the organic acid. The cardanol-based polyol may be reacted with isocyanate to form polyurethane. Alternatively blowing agents are included with the cardanol-based polyol before it is reacted with the isocyanate. These polyols are especially suitable for making rigid foams of very low density and high compressive strength.
REFERENCES:
patent: 1725791 (1929-08-01), Harvey
patent: 2317585 (1943-04-01), Solomon
patent: 2470808 (1949-05-01), De Groote et al.
patent: 2758986 (1956-08-01), Mecum
patent: 4454248 (1984-06-01), Pollock et al.
patent: 6051623 (2000-04-01), Sticlau
patent: 2005/0192423 (2005-09-01), Niesten et al.
patent: 100 04 427 (2001-10-01), None
International Search Report, Jan. 2005.
Strocchi et al., “Cardanol in Germ and Seed Oils Extracted from Cashew Nuts obtained by the Oltremare Process” Journal of the American Oil Chemists' Society, vol. 56(1979)pp. 616-619, p. 617.
Izzo et al., “Cashew Nut Shell Liquid. VII. The Higher Olefinic Components of Cardanol”, Journal of Organic Chemistry, vol. 15,(1950)p. 707-714, XP002313980.
Pillai, “Polymeric Materials From Renewable Resources: High Value Polymers from Cashew Nut Shell Liquid”, Popular Plastics and Packaging, Pastindia, Special Issue(2000)pp. 79-90, XP001204902.
Ittara Suresh Kattimuttathu
Sarangapani Kishanprasad Vadi
Cooney Jr. John M.
Nixon & Vanderhye P.C.
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