Method of branching polyesters

Details Method of branching polyesters Method of branching polyesters

1989-12-07

1991-11-12

Short, Patricia

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525444, C08L 6702, C08G 6391

Patent

active

050649140

ABSTRACT:
Linear polyester are branched by transesterification with resins having repeating or recurring polymer chain units of the formula: ##STR1## wherein m, n and p are each independent integers of 0 or 1; R represents hydrocarbyl; and E represents alkylene containing from 1 to 15 carbon atoms, inclusive, halogen- substituted alkylene of 1 to 15 carbon atoms, inclusive, alkylene of 1 to 15 carbon atoms, inclusive, substituted with a --COOR group where R is as previously defined, or alkylene having 1 to 15 carbon atoms substituted with a monovalent group of the formula: ##STR2## wherein X represents one of hydrogen, hydrocarbyl or ##STR3## wherein R is as defined above; provided there is at least one moiety present, containing an R group.

REFERENCES:
patent: 4132707 (1979-01-01), Borman
patent: 4826928 (1989-05-01), Rosenquist

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