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US 4,419,299 AGranted
Phosphonopolyester oligomers
AssigneeThe Dow Chemical Company
InventorRobert E. Hefner, Jr.
Life of this patent
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Abstract
Phosphonopolyester oligomers are prepared from hydroxyalkylated 2,2',-bis(3-allylphenyl-4-hydroxy) alkanes and phosphonyl dihalides. The oligomers are useful in the preparation of polyester resins, epoxy resins, and polyurethanes.
Claims3
An oligomer having recurring units represented by the following general formula ##STR5## wherein each A is independently ##STR6## or a divlaent hydrocarbon group having from 1 to about 8 carbon atoms;
- each Q is independently oxygen or sulfur;
- each R is independently a hydrocarbon group having from about 1 to about 10 carbon atoms;
- each R' is independently a --CH.dbd.CH.sub.2 group or a --CXH--CXH.sub.2 group, wherein X is chlorine or bromine;
- each Z is independently a moiety such that the terminal groups are hydroxyl or phosphonate groups or combination thereof;
- each m is independently zero or one;
- each m' independently has a value from 1 to about 5;
- each n independently has a value of 2, 3 or 4;
- and x has an average value of from 1 to about 10.
5 more elements
Dependencies are inferred from the claim text.