Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-11-19
1994-01-25
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525533, 525922, 528112, C08F28300
Patent
active
052816788
ABSTRACT:
A method of preparing an unsaturated ester resin having improved storage stability is disclosed. An epoxy compound and polymerizable unsaturated monocarboxylic acid are reacted in the presence of a trivalent organic phosphorous catalyst. The catalyst is subsequently deactivated by oxidation. The resin may then be reacted with an acid anhydride.
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G. M. Kosolapof and L. Maierr, "Organic Phosphorous Compound", (John Wiley & Sons) pp. 342-347.
P. D. Bartnett, E. F. Fox, R. E. Davis: "Reactions of Elemental Sulfur. IV. Catalatic Effects in the Reaction of Sulfur with Triphenylphosphine", J. Am. Chem. Soc., 83 pp. 103-109 (1961).
M. J. Boskin and P. B. Dinney, "Reactions of Episulfides and Epoxides with Trisubstituted Phosphines",Chemistry and Industry, pp. 330-331 (1959).
Hagiwara Yoshichi
Nishikawa Katsue
Bleutge John C.
Gulakowski Randy
Looper Valerie E.
W. R. Grace & Co.
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