# US 5,344,868 A · Polyglutarimide/glass fiber combinations

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- Number: US 5,344,868 A
- Document ID: US5344868A
- Status: Granted
- Kind: A
- Application number: 08/036,121
- Filed: 1993-03-23
- Granted: 1994-09-06
- Earliest claimed: 1993-03-23
- Assignees: Rohm and Haas Company
- Inventors: Michael P. Hallden-Abberton; William J. Work; Mark A. Abramowicz; Phuong N. Duong
- Web page: https://patentgrep.com/patent/US5344868A

## CPC

- C08K 7/14: Glass
- C08K 3/013: Fillers, pigments or reinforcing additives
- C08K 9/04: Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)}
- C08L 33/24: Homopolymers or copolymers of amides or imides
- C08L 63/00: Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- H05K 1/0346: {containing N}
- H05K 1/0366: {reinforced, e.g. by fibres, fabrics (H05K1/036 takes precedence)}
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

Glass-reinforced polyglutarimides exhibit improved impact resistance when low levels of phenoxy resin are incorporated into the blend.

## Claims

### Claim 1

A blend comprising:
a. From about 80 to about 99.5 parts, based on total polymer content, of a polyglutarimide;
b. From about 0.5 to about 20 parts, based on total polymer content, of a phenoxy resin;
c. From about 10 to about 50 parts, based on the total weight of all components of the blend, of an inorganic fiber or particulate with functional surface groups.

### Claim 2 (depends on 1)

The blend of claim 1 wherein the inorganic fiber or particulate is silica-based glass.

### Claim 3 (depends on 2)

The blend of claim 2 wherein the silica-based glass is in the form of a fiber.

### Claim 4 (depends on 1)

The blend of claim 1 wherein the polyglutarimide contains N-methyl dimethylglutarimide units.

### Claim 5 (depends on 4)

The blend of claim 4 wherein the polyglutarimide contains at least 60 weight percent of N-methyl dimethylglutarimide units.

### Claim 6 (depends on 5)

The blend of claim 5 wherein the polyglutarimide also contains up to about 10 weight percent of methacrylic acid and/or methacrylic anhydride units.

### Claim 7 (depends on 1)

The blend of claim 1 wherein the phenoxy resin is that formed by copolymerization of epichlorohydrin (1-chloro-2,3-epoxypropane) and bisphenol A (2,2-bis-(4-hydroxyphenyl)propane).

### Claim 8 (depends on 3)

The blend of claim 3 wherein the glass fiber is about 9 to about 13 .mu.m. in diameter.

### Claim 9 (depends on 1)

The blend of claim 1 wherein the inorganic fiber or particulate with functional surface groups, prior to blending, is sized with a silane or with a chemical which provides amino groups to the fiber surface.

### Claim 10 (depends on 9)

The blend of claim 9 wherein the sizing chemical is an aminosilane.

### Claim 11 (depends on 1)

The blend of claim 1 further containing a brominated aromatic flame-retardant additive.

### Claim 12 (depends on 11)

The blend of claim 11 wherein the brominated aromatic flame-retardant additive is formed by copolymerization of epichlorohydrin (1-chloro-2,3-epoxypropane) and tetrabromobisphenol A (2,2-bis-(4-hydroxy-2,3,5,6-tetrabromophenyl)propane).

### Claim 13 (depends on 1)

The blend of claim 1 wherein the polyglutarimide and the phenoxy resin are compounded together in a single molten blend prior to combination with the inorganic fiber or particulate with functional surface groups.

### Claim 14 (depends on 11)

The blend of claim 11 wherein the polyglutarimide, the brominated flame retardant additive, and the phenoxy resin are compounded together in a single molten blend prior to combination with the inorganic fiber or particulate with functional surface groups.