Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1986-04-04
1987-12-15
Phynes, Lucille M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
527300, 527311, 528272, 5282955, 536 41, 536115, 536119, C08G 6354, C08G 6348
Patent
active
047134364
ABSTRACT:
Glycoside-containing polyester products having improved color characteristics are provided by a polyester preparation process in which a polyol reactant containing at least a minor proportion of a glycoside reactant is reacted with a lower alkyl ester of a polybasic acid. The color characteristics of such products are notably improved relative to that which is obtained when said reaction is instead conducted using the corresponding polybasic acid or anhydride in place of the indicated lower alkyl ester thereof.
The color improvement benefits of the present invention are particularly pronounced and dramatic when the polybasic acid component of the desired polyester product comprises an aromatic polybasic acid and when a lower alkyl ester of said aromatic polybasic acid is employed in the reaction in place of the aromatic acid itself.
REFERENCES:
patent: 4413116 (1983-11-01), Reuter et al.
Downs John D.
Drury, Jr. Raymond L.
Moser Kenneth B.
Roth C. Deane
A. E. Staley Manufacturing Company
Campbell Michael F.
Guffey James B.
Phynes Lucille M.
Wood J. Daniel
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