# US 5,344,895 A · Polyamideimide composition with improved processability

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- Number: US 5,344,895 A
- Document ID: US5344895A
- Status: Granted
- Kind: A
- Application number: 08/042,235
- Filed: 1993-04-01
- Granted: 1994-09-06
- Earliest claimed: 1993-04-01
- Assignees: University of Massachusetts Lowell
- Inventors: Xiaoyun Lai; Dafang Zhao; Francis Lai
- Web page: https://patentgrep.com/patent/US5344895A

## CPC

- C08L 79/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A polymer composition is disclosed which includes a polyamideimide polymer and a liquid crystalline polymer, wherein the amount of the liquid crystalline polymer is in an amount which significantly decreases the melt viscosity of the polyamideimide polymer while not significantly decreasing the mechanical properties of the polyamideimide polymer.

## Claims

### Claim 1

A polymer composition comprising a polyamideimide polymer and a liquid crystalline polymer, wherein the liquid crystalline polymer is in an amount which significantly decreases the melt viscosity of the polyamideimide polymer while not significantly decreasing the mechanical properties of the polyamideimide polymer.

### Claim 2 (depends on 1)

The polymer composition of claim 1 wherein the polyamideimide polymer is present in the range of between about seventy and ninety-seven percent, by weight.

### Claim 3 (depends on 2)

The polymer composition of claim 2 wherein the polyamideimide is Torlon 4203L.TM. brand polyamideimide.

### Claim 4 (depends on 1)

The polymer composition of claim 1 wherein the liquid crystalline polymer is a polyester.

### Claim 5 (depends on 4)

The polymer composition of claim 4 wherein the liquid crystalline polymer is an aromatic polyester.

### Claim 6 (depends on 5)

The polymer composition of claim 5 wherein the aromatic polyester is HX4000.TM. brand polyester.

### Claim 7

A polymer composition containing a polyamideimide polymer and a liquid crystalline polyester, wherein the liquid crystalline polyester is in an amount which significantly decreases the melt viscosity of the polyamideimide polymer.

### Claim 8 (depends on 7)

The polymer composition of claim 7 wherein the polyamideimide polymer is present in the range of between about seventy and ninety-seven percent, by weight.

### Claim 9

A polymer composition containing a polyamideimide and a liquid crystalline aromatic polyester, wherein the liquid crystalline aromatic polyester is in an amount which decreases the melt viscosity of the polymer composition to below that of either the polyamideimide or the liquid crystalline aromatic polyester.