Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1997-06-27
1998-12-22
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528190, 528192, 528193, C08G 6302
Patent
active
058521623
ABSTRACT:
A polyester composition has a number average molecular weight M.sub.n of between about 500 and about 1000, a weight average molecular weight M.sub.w of between about 600 and about 2000, a polydispersity below about 2, preferably below about 1.8, hydroxyl functionality between 2 and 3, a hydroxyl value of between about 160 and about 260, and an acid number below about 10. Less than about 5% of the OH groups of the polyester are pendent, the rest being terminal. Between about 10 and about 50 wt % of the monomers used to form the polyester composition are anhydrides having the formula: ##STR1## where R.sup.1 is a non-aromatic, saturated or unsaturated hydrocarbon chain having between 6 and 30 carbon atoms, R.sup.2 is hydrogen or a non-aromatic saturated or unsaturated hydrocarbon having between 1 and 8 carbon atoms, and R.sup.1 and R.sup.2 have, in total, between 8 and 30 carbon atoms. The polyester in conjunction with a hydroxyl-reactive curative provides a coating composition.
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Algrim Donald J.
Lewarchik Ronald J.
Smith Marc L.
Zupancic Joseph J.
Morton International Inc.
Nacker Wayne E.
Rajguru U. K.
Seidleck James J.
White Gerald K.
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