Process for preparing phenol-functional polymer
AssigneeExxon Chemical Patents Inc.
InventorsAlbert I. Yezrielev, William E. Wellman, Ralph M. Kowalik, George A. Knudsen, Michael G. Romanelli
Life of this patent
Estimating the term…
Abstract
Non liquid-crystalline esterphenol-capped liquid polymer and polyol compositions in combination with an amino crosslinking agent endow coating compositions containing them with the ability of providing films having superior properties. The esterphenol-capped polymers and polyols can be prepared by direct esterification of hydroxybenzoic acid without its decarboxylation.
Claims51
A process for preparing an hydroxybenzoic acid-capped polymer represented by the formula:
- ##STR17## wherein R is a polyvalent radical with a number average molecular weight between about 200 and 10,000 derived from a polymer having at least 2 aliphatic hydroxy groups;
- R.sup.2 is hydrogen, hydroxy, halo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, or C.sub.1-4 alkoxycarbonyl;
- and
- n is an integer between 2 and 10, inclusive;
- comprising the step of directly esterifying a substantial amount of the aliphatic hydroxy-functional polymer with an effective amount of an hydroxybenzoic acid at a reaction temperature below about 200.degree. C.
A process for preparing an hydroxybenzoic acid-capped polymer represented by the formula:
- ##STR18## wherein R is a polyvalent radical with a number average molecular weight between about 200 and 10,000 derived from a polymer having at least 2 aliphatic hydroxy groups;
- R.sup.1 is a direct bond, C.sub.1-20 hydrocarbylene, or C.sub.1-20 oxyhydrocarbylene;
- R.sup.2 is hydrogen, hydroxy, halo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, or C.sub.1-4 alkoxycarbonyl;
- and
- n is an integer between 2 and 10, inclusive;
- comprising the steps of reacting a molar excess of a C.sub.2-8 polyhydric alcohol with an hydroxybenzoic acid at a reaction temperature below about 200.degree. C. thereby partially esterifying the polyhydric alcohol, and then reacting while maintaining the reaction temperature below about 200.degree. C. the reaction mixture of the partially esterified polyhydric alcohol and the C.sub.2-8 polyhydric alcohol with at least one polybasic acid or acid derivative in an amount effective to achieve a number average molecular weight between about 200 and 10,000.
A process for preparing an hydroxybenzoic acid-capped polyhydric alcohol represented by the formula:
- ##STR19## wherein R is a polyvalent radical derived from a C.sub.12-40 polyhydric alcohol;
- R.sup.2 is hydrogen, hydroxy, halo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, or C.sub.1-4 alkoxycarbonyl;
- and
- n is an integer between 2 and 10, inclusive;
- comprising the step of directly esterifying a substantial amount of the C.sub.12-40 polyhydric alcohol with an effective amount of an hydroxybenzoic acid at a reaction temperature below about 200.degree. C.
A process for preparing a composition comprising a non-liquid crystalline, esterphenol-capped polymer represented by the formula:
- ##STR20## wherein R is a polyvalent radical with a number average molecular weight between about 200 and 10,000 derived from a hydroxy functional C.sub.12 to C.sub.40 polyhydric alcohol, wherein:
- R.sup.1 is a direct bond, C.sub.1-20 hydrocarbylene, or C.sub.1-20 oxyhydrocarbylene;
- R.sup.2 is hydrogen, hydroxy, halo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, or C.sub.1-4 alkoxycarbonyl;
- and
- n is an integer between 2 and 10, inclusive;
- said process comprising:
- a) forming a mixture of said hydroxy functional reactant and a hydroxy aromatic acid having the formula:
- ##STR21## b) heating said mixture, optionally in the presence of an esterification catalyst, at a temperature in the range of from about 140.degree. C. to about 200.degree. C. to form said esterphenol capped polymer.
Dependencies are inferred from the claim text.