Possible active matrix polymers
AssigneeXerox Corporation
InventorRichard W. Radler, Jr.
Life of this patent
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Abstract
Active polymeric matrices, xerographic elements and a process for obtaining the monomer and polyester material by reacting an aldehyde of a desired polycyclic aromatic compound with a dicarboxy acid ester in the presence of a base to obtain an unsaturated dicarboxyester intermediate; cyanating the intermediate in the presence of alcohol to obtain a saturated B-cyano monocarboxy acid ester which is hydrolyzed to the .alpha., .beta. dicarboxy intermediate and then esterified to obtain the .alpha., .beta. dicarboxy ester monomer. This monomer is catalytically polymerizable with a polyhydroxy alcohol such as a glycol to obtain the polyester.
Claims20
A polyester material of the formula ##STR5## wherein .pi. is defined as pyrene, tetraphenylpyrene, phenylpyrene, acetylpyrene, benzpyrene, alkylpyrene, chrysene, benzochrysene, benzathracene, dibenzathracene, perylene, picene, tetracene, fluorene, fluorenone, nitrofluoroenone, phenanthrene, anthraquinone, thiophene or dibenzothiophene radicals;
- R.sub.3 is defined as divalent aromatic hydrocarbon radical or as a straight or branched methylene chain of from 1-20 carbon atoms;
- R.sub.4 and R.sub.5 are individually defined as low molecular weight aliphatic polymeric end groups;
- n and o are integers in a ratio of about 1-3:1;
- and
- p is an integer commensurate with a number average molecular weight of about 5,000 - 100,000.
The process of claim 14, wherein polymerization is effected in the presence of disodium hexabutyl titanate at a temperature of about 185.degree. - 250.degree. C.
A process for obtaining a polyester comprising contacing a reactive amount of a diester of the formula:
- ##STR6## wherein .pi. is defined as pyrene, tetraphylpyrene, phenylpyrene, acetylpyrene, benzyoyrene, alkylpyrene, chrysene, benzochrysene, benzathracene, dibenzathracene, perylene, picene, tetracene, fluorene, fluorenone, nitrofluorenone, phenanthrene, anthroquinone, thiophene or dibenzothiophene radicals;
- R and R.sub.2 are individually and separately defined at each occurrence as an alkyl group, with a polyhydroxy alcohol of the formula:
- OH--R.sub.3 --OH
- wherein R.sub.3 is defined as an aromatic hydrocarbon or an alkylene radical;
- effecting the reaction with heat in the presence of a polymerization catalyst.
A process for obtaining a polyester comprising contacting a reactive amount of diester of the formula:
- ##STR7## wherein .pi. is defined as pyrene, methylpyrene, 1,2-benzathracene or chrysene radicals;
- and
- R and R.sub.2 are individually and separately defined at each occurrence as a lower alkyl group;
- with a polyhydroxy alcohol of the formula:
- OH--R.sub.3 --OH
- wherein R.sub.3 is defined as an alkylene group;
- and effecting the reaction with heat in the presence of a polymerization catalyst.
Dependencies are inferred from the claim text.