Aromatic polyols made from alkylene glycols and waste streams fr

Details Aromatic polyols made from alkylene glycols and waste streams fr Aromatic polyols made from alkylene glycols and waste streams fr

1983-03-18

1984-04-24

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521128, 521129, 521124, 521126, 521127, 521167, 521172, 252182, C08G 1814, C08G 1832, C08G 1866, C09K 300

Patent

active

044449208

ABSTRACT:
Mixtures of aromatic polyols containing ester functionalities suitable for use in rigid foams prepared by reacting a dimethyl terephthalate waste stream containing methyl p-formylbenzoate over a metal alkoxide catalyst and subsequently transesterifying the product with a polyalkylene glycol in the presence of heat are described. These novel polyols may be blended with conventional polyols to yield excellent rigid foams, thus serving as useful polyol extenders. These low hydroxyl number extender polyols unexpectedly have a low relative viscosity.

REFERENCES:
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patent: 3647759 (1972-03-01), Walker
patent: 3892796 (1975-07-01), Leibfried
patent: 4048104 (1977-09-01), Svoboda et al.
patent: 4137265 (1979-01-01), Edwards et al.
patent: 4223068 (1980-09-01), Carlstrom et al.
patent: 4237238 (1980-12-01), DeGuiseppi et al.
patent: 4246365 (1981-01-01), Wiedermann et al.
patent: 4346229 (1982-08-01), Derr et al.
patent: 4394286 (1983-07-01), Millick
DuPont Data Sheet-DMT-HBR Preliminary Information-Petrochemicals Department, Intermediates Division.

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