# US 4,393,196 A · Polymers containing recurring units from dienoic acid

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- Number: US 4,393,196 A
- Document ID: US4393196A
- Status: Granted
- Kind: A
- Application number: 06/238,057
- Filed: 1981-03-02
- Granted: 1983-07-12
- Earliest claimed: 1981-03-02
- Assignees: Polaroid Corporation
- Inventors: Howard G. Rogers; Russell A. Gaudiana; Jeannette S. Manello; Ronald A. Sahatjian
- Web page: https://patentgrep.com/patent/US4393196A

## CPC

- C08G 73/0633: {with only two nitrogen atoms in the ring}
- C08G 69/26: derived from polyamines and polycarboxylic acids
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Disclosed is a class of polymers comprising recurring units of the formula ##STR1## where Mu is a divalent radical having the formula ##STR2## where each of D, D', E and E' is hydrogen, alkyl or substituted-alkyl; and Az is a divalent radical having the formula ##STR3## where each of R and R' is hydrogen, alkyl, aryl, alkaryl or aralkyl and W is a single bond, alkylene or alkenylene; or Az is a divalent radical having the formula ##STR4## where each of Y and Y' represent the atoms necessary to complete a piperazine or substituted-piperazine radical. Molecularly oriented polymers of the invention exhibit birefringence and can be utilized in filter, polarizing and other optical devices.

## Claims

### Claim 1

A film- or fiber-forming polymer comprising recurring units of the formula ##STR38## wherein each of D, D', E and E' is hydrogen, alkyl or substituted-alkyl and each of R and R' is hydrogen, alkyl, aryl, alkaryl or aralkyl.

### Claim 2 (depends on 1)

The polymer of claim 1 wherein each of D and E' is the same and each of D' and E is the same.

### Claim 3 (depends on 2)

The polymer of claim 2 wherein each of D, D' E and E' is hydrogen.

### Claim 4 (depends on 2)

The polymer of claim 2 wherein each of D and E' is alkyl and each of D' and E is hydrogen.

### Claim 5 (depends on 4)

The polymer of claim 4 wherein each of D and E' is methyl.

### Claim 6 (depends on 1)

The polymer of claim 1 wherein each of said R and R' is hydrogen.

### Claim 7 (depends on 1)

The polymer of claim 1 wherein each of D and E' is methyl, each of D' and E is hydrogen and each of R and R' is hydrogen.

### Claim 8 (depends on 1)

The polymer of claim 1 wherein each of D,D', E,E', R and R' is hydrogen.

### Claim 9

A birefringent molecularly oriented polymer in the form of a film or fiber comprising recurring units of the formula ##STR39## wherein each of D, D', E and E' is hydrogen, alkyl or substituted-alkyl and each of R and R' is hydrogen, alkyl, aryl, alkaryl or aralkyl.

### Claim 10 (depends on 9)

The birefringent molecularly oriented polymeric film or fiber of claim 9 wherein each of R and R' is hydrogen.

### Claim 11 (depends on 10)

The birefringent molecularly oriented polymeric film or fiber of claim 10 wherein each of D and E' is methyl and each of D and E is hydrogen.

### Claim 12 (depends on 10)

The birefringent molecularly oriented polymeric film or fiber of claim 10 wherein each of D, D', E and E' is hydrogen.

### Claim 13 (depends on 9)

The birefringent molecularly oriented polymer of claim 9 in the form of a unidirectionally stretched film or fiber.