Colorless grained alpha-form crystals of tetrakis [3-(3,5-di-t-b

Details Colorless grained alpha-form crystals of tetrakis [3-(3,5-di-t-b Colorless grained alpha-form crystals of tetrakis [3-(3,5-di-t-b

1990-06-15

1992-09-01

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560 67, C07C 6976

Patent

active

051440580

ABSTRACT:
Tetrakis [3-(3,5-di-t-butyl-4-hydroxyphenyl)propionyloxymethyl]methane in the form of grained alpha-form crystals having improved coloration. The above compound is prepared by transesterifying low-alkyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate with pentaerythritol in the presence of catalyst and aliphatic hydrocarbons as reaction solvent.

REFERENCES:
patent: 3644482 (1972-02-01), Dexter et al.
patent: 4405807 (1980-09-01), Hasui
patent: 4594444 (1986-06-01), Orban
patent: 4739102 (1988-04-01), Tokunaga

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