Aromatic polyester polyols from dimethyl terephthalate process r

Details Aromatic polyester polyols from dimethyl terephthalate process r Aromatic polyester polyols from dimethyl terephthalate process r

1989-03-27

1990-01-30

Van Balen, William J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

4283184, 4283191, 4284231, 4284251, 4284258, C08G 1814, B32B 326

Patent

active

048974293

ABSTRACT:
A polyester polyol composition is prepared by (1) reacting 5 to 40 percent tall oil fatty acids, (b) 20 to 80 percent dimethyl terephthalate process residue and (c) 20 to 60 percent polyhydric alcohol, based on the weight of the reaction mixture, in the presence of an esterification/transesterification catalyst while continuously removing water and methanol that are formed during the reaction, to form a first reaction product containing residual carboxylic acid functionality and (2) reacting 1 to 25 percent of at least one alkylene carbonate, or an equimolar amount of at least one alkylene oxide, with the residual carboxylic acid functionality in the presence of a catalyst. The preferred alkylene carbonate/oxide is ethylene or propylene (or a mixture thereof) carbonate/oxide. A foamed laminate made from the polyester polyol has reduced surface friability and faster rates of cure.

REFERENCES:
patent: 4758602 (1988-07-01), Trowell

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