Polyester catalyst system comprising an antimony-containing polycondensation catalyst and an ethylenically unsaturated compound and process employing same
AssigneeStauffer Chemical Company
InventorRonald Lee Muntz
Life of this patent
Estimating the term…
Abstract
A polycondensation catalyst system comprising an antimony-containing polycondensation catalyst and selected ethylenically unsaturated compounds, such as pentaerythritol triacrylate. The ethylenically unsaturated compound stabilizes tne antimony-containing catalyst.
Claims26
A polycondensation catalyst system comprising an antimony-containing polycondensation catalyst;
- and an ethylenically unsaturated compound having the formula ##STR2## wherein X is hydrogen, --OR.sup.4, --SR.sup.4, amino, halogen, --O.sub.2 CR.sup.5,--NC(O)R.sup.5 or mercapto;
- Y is oxygen or sulfur;
- and R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are independently selected hydrogen or substituted or unsubstituted alkyl, cycloalkyl, alkenyl, hetercyclic, aryl, aralkyl or alkaryl, the substituted groups in R.sup.1, R.sup.2, R.sup.3 and R.sup.5 being independently selected hydroxyl, mercapto, amino, amido, imino, oxime, halogen, aldehydo, alkoxy, alkylthio, keto, sulfinyl, sulfonyl, phosphato, phosphono or phosphino;
- the substituted groups in R.sup.4 being hydroxyl, mercapto, amino, amido, imino, oxime, halogen, carboxyl, carboxylate, haloformyl, carboxylic anhydride, aldehydo, alkoxy, alkylthio, keto, sulfinyl, sulfonyl, phosphato, phosphono or phosphino;
- the mole ratio of the ethylenically unsaturated bond in said ethylenically unsaturated compound to said antimony-containing polycondensation catalysts being 1:1 to 20:1.
A process for preparing polyesters comprising condensing glycol terephthalate at a temperature of 150.degree. to 350.degree. C. in the presence of a catalyst system which comprises an antimony-containing polycondensation catalyst and an ethylenically unsaturated compound having the formula ##STR3## wherein X is hydrogen, --OR.sup.4,--SR.sup.4, amino, halogen, --O.sub.2 CR.sup.5,--NC(O)R.sup.5 or mercapto;
- Y is oxygen or sulfur;
- and R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are independently selected hydrogen or substituted or unsubstituted alkyl, cycloalkyl, alkenyl, heterocyclic, aryl, aralkyl or alkaryl, the substituted groups in R.sup.1, R.sup.2, R.sup.3 and R.sup.5 being independently selected hydroxyl, mercapto, amino, amido, imino, oximo, halogen, aldehydo, alkoxy, alkylthio, keto, sulfinyl, sulfonyl, phosphato, phosphono or phosphino;
- the substituted groups in R.sup.4 being hydroxyl, mercapto, amino, amido, imino, oximo, halogen, carboxyl, carboxylate, haloformyl, carboxylic anhydride, aldehydo, alkoxy, alkylthio, keto, sulfinyl, sulfonyl, phosphato, phosphono or phosphino;
- the mole ratio of the ethylenically unsaturated bond in said ethylenically unsaturated compound to said antimony-containing polycondensation catalyst being 1:1 to 20:1.
Dependencies are inferred from the claim text.