Process for reducing odor in isotactic polypropylene

Details Process for reducing odor in isotactic polypropylene Process for reducing odor in isotactic polypropylene

1987-09-29

1989-07-25

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528491, 528495, 528503, 524315, 524317, 524378, 524379, 524388, C08F 600, C08F 1006

Patent

active

048514993

ABSTRACT:
A process for reducing the odor of isotactic polypropylene containing an odor producing unsubstituted or substituted benzoic acid ester by admixing molten isotactic polypropylene with a compound capable of undergoing transesterification with the odor producing ester, said transesterification compound being (i) a partially esterified glycerol; (ii) an expoxide; (iii) a monofunctional or polyfunctional alcohol; (iv) an aliphatic acid ester; or (v) mixtures thereof wherein the transesterification compound is of such functionality and/or of sufficient molecular weight to yield an ester of a molecular weight of at least about 300 upon undergoing ester interchange with said odor causing benzoic acid ester.

REFERENCES:
patent: 3255166 (1966-06-01), Bernhardt et al.
patent: 3773743 (1973-11-01), Ainsworth, Jr. et al.
patent: 4051313 (1977-09-01), Luciani et al.
patent: 4104247 (1978-08-01), Kato et al.
patent: 4331791 (1982-05-01), Rohlfing et al.
Translation of Japanese Patent Application No. 58-146694 to Nakamura et al., Laid-Open Feb. 28, 1985.

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