Process for the preparation a bis(3,3-bis(4-hydroxyalkylphenyl)b

Details Process for the preparation a bis(3,3-bis(4-hydroxyalkylphenyl)b Process for the preparation a bis(3,3-bis(4-hydroxyalkylphenyl)b

1990-10-31

1992-04-21

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

C07C 6976

Patent

active

051070430

ABSTRACT:
By dividing the known condensation of acetoacetic acid diol esters with phenols into two process steps, a reduction in the cost of the entire process can be achieved.
Methyl acetoacetate is first condensed with a phenol and the methyl 3,3-bis(4-hydroxyalkylphenyl)butanoate formed is reacted with the desired diol in the presence of a transesterification catalyst. In this way only one acetoacetic ester is necessary for various final products. The final products are useful stabilizers for plastics, in particular polyolefins.

REFERENCES:
patent: 3450746 (1969-06-01), Stapfer
patent: 4052364 (1977-10-01), Christidis

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