Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1998-04-20
1998-11-24
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528302, 525437, C08G 6302
Patent
active
058408274
ABSTRACT:
The polyester composition of this invention comprises a polyester oligomer having a number average molecular weight of from about 650 to about 950, a weight average molecular weight of from about 950 to about 1900, and a polydispersity of from about 1.45 to about 2. The hydroxyl value is from about 150 to about 275, and the acid number is less than about 7. Substantially all of the hydroxy groups are primary and from 0 to about 5% of the hydroxy groups are present as pendant hydroxy-alkyl groups. The polyester is formed by a two-stage reaction of monomers consisting of carboxylic anhydrides having from 4 to 34 carbon atoms and polyols having from 2 to 20 carbon atoms. From about 10 to about 50% by weight of the monomers are anhydrides having the formula: ##STR1## where R.sup.1 is a non-aromatic hydrocarbon radical having from 6 to 30 carbon atoms, R.sup.2 is hydrogen or a non-aromatic hydrocarbon radical having from 1 to 8 carbon atoms. The total number of carbon atoms in R.sup.1 and R.sup.2 is from 8 to 30 carbon atoms. The polyester in conjunction with a hydroxyl-reactive curative provides a coating composition.
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Algrim Doanld J.
Lewarchik Ronald J.
Smith Marc L.
Zupancic Joseph J.
Acquah Samuel A.
Didrick Robert M.
Morton International Inc.
White Gerald K.
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