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US 4,064,107 AGranted
High temperature polyurea resins
AssigneeCelanese Corporation
InventorsRobert W. Stackman, Anthony B. Conciatori
Life of this patent
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Abstract
This invention provides high temperature performance polyurea resins which contain polyphenyl ether blocks as recurring structural units. The polyurea resins are melt stable at temperatures up to about 400.degree. C and higher.
Claims12
A polyurea resin which consists essentially of the condensation polymerization product of p,p'-bis(4-aminophenoxy)diphenyl ether with tolylene diisocyanate.
A polyurea resin which consists essentially of the condensation polymerization product of p,p'-bis(4-aminophenoxy)diphenyl ether and methylene di-p-phenylisocyanate.
Dependencies are inferred from the claim text.