# US 8,785,590 B2 · Polyamide

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- Number: US 8,785,590 B2
- Document ID: US8785590B2
- Status: Granted
- Kind: B2
- Application number: 13/391,075
- Filed: 2010-08-18
- Published: 2012-07-05
- Granted: 2014-07-22
- Earliest claimed: 2009-08-20
- Assignees: Mitsubishi Gas Chemical Company, Inc.
- Applicants: Kentaro Ishii; Shun Ogawa
- Inventors: Kentaro Ishii; Shun Ogawa
- Web page: https://patentgrep.com/patent/US8785590B2

## CPC

- C08G 69/26: derived from polyamines and polycarboxylic acids
- C08G 69/265: {from at least two different diamines or at least two different dicarboxylic acids}
- C08L 77/06: Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The invention provides a polyamide having a dicarboxylic acid unit containing a decahydronaphthalenedicarboxylic acid unit in an amount of 60 mol % or more, and a diamine unit.

## Claims

### Claim 1

A transparent polyamide, comprising:
a dicarboxylic acid unit comprising 95 mol % or more of a 2,6-decahydronaphthalenedicarboxylic acid unit, and
a diamine unit comprising 70 mol % or more of at least one unit selected from the group consisting of an m-xylylenediamine unit, a p-xylylenediamine unit, a 1,3-bis(aminomethyl)cyclohexane unit, and a 1,4-bis(aminomethyl)cyclohexane unit.

### Claim 2 (depends on 1)

The transparent polyamide of claim 1, which has a glass transition temperature of 180 to 250° C.

### Claim 3 (depends on 1)

The transparent polyamide of claim 1, which has a glass transition temperature of 190 to 240° C.

### Claim 4 (depends on 1)

The transparent polyamide of claim 1, obtained by a method comprising polycondensing (i) a dicarboxylic acid comprising 95 mol % or more of a 2,6-decahydronaphthalenedicarboxylic acid and (ii) a diamine comprising 70 mol % or more of at least one member selected from the group consisting of m-xylylenediamine, p-xylylenediamine, 1,3-bis(aminomethyl)cyclohexane, and 1,4-bis(aminomethyl)cyclohexane.

### Claim 5 (depends on 1)

The transparent polyamide of claim 1, wherein the dicarboxylic acid unit comprises 100% of the 2,6-decahydronaphthalenedicarboxylic acid unit.

### Claim 6 (depends on 1)

The transparent polyamide of claim 1, wherein the diamine unit comprises the m-xylylenediamine unit.

### Claim 7 (depends on 1)

The transparent polyamide of claim 1, wherein the diamine unit comprises the p-xylylenediamine unit.

### Claim 8 (depends on 1)

The transparent polyamide of claim 1, wherein the diamine unit comprises the 1,3-bis(aminomethyl)cyclohexane unit.

### Claim 9 (depends on 1)

The transparent polyamide of claim 1, wherein the diamine unit comprises the 1,4-bis(aminomethyl)cyclohexane unit.

### Claim 10 (depends on 1)

A film formed from the transparent polyamide of claim 1.