Strom, Robert M.;

Carbamates of biphenyls

Difunctional ethylenically unsaturated carbamate derivatives of 4,4'-dihydroxybiphenyl compounds are disclosed.

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What is claimed is:

1. A compound corresponding to the formula:

wherein:

R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen, C.sub.1-4 alkyl, and phenyl;

A each occurrence is independently a C.sub.2-4 vicinal alkylene group;

n is an integer from zero to about 20; and

R is an ethylenically unsaturated aliphatic moiety selected from the group consisting of --CR'.dbd.CH.sub.2 and --CH.sub.2 CH.sub.2 OC(O)CR'.dbd.CH.sub.2 where R' is hydrogen or methyl.

2. A compound according to claim 1 wherein n is zero.

3. A compound according to claim 2 wherein R.sub.1 and R.sub.2 are hydrogen, methyl or tertiary butyl.

4. A compound according to claim 3 wherein R is --CH.sub.2 CH.sub.2 OC(O)CR'.dbd.CH.sub.2.

5. A compound according to claim 4 which is 3,3',5,5'-tetrakis(1,1-dimethylethyl)-1,1'-biphenyl-4,4'-diyl bis(oxycarbonylamino-2,1-ethanediyl)bis(2-methyl-2-propenoate).

6. A compound according to claim 3 wherein R is --CR'.dbd.CH.sub.2.