# US 6,296,940 B1 · Laminate comprising a flame-retardant resin composition

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- Number: US 6,296,940 B1
- Document ID: US6296940B1
- Status: Granted
- Kind: B1
- Application number: 09/603,961
- Filed: 2000-06-26
- Granted: 2001-10-02
- Earliest claimed: 1997-05-30
- Assignees: Sumitomo Bakelite Co., Ltd.
- Inventors: Mikio Ito; Sumiya Miyake
- Web page: https://patentgrep.com/patent/US6296940B1

## CPC

- C09K 21/14: Macromolecular materials
- C08K 5/53: bound to oxygen and to carbon only
- C08L 61/06: of aldehydes with phenols
- C08L 63/00: Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- C09K 21/12: containing phosphorus
- Y10T 428/31518: Next to glass or quartz
- Y10T 428/31522: Next to metal
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- 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)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention provides a flame-retardant resin composition comprising: (A) an epoxy resin other than halogenated epoxy resins, having at least two epoxy groups in the molecule, (B) a curing agent, and (C) a product obtained by reacting (C1) a phosphorus compound having at least one P-H linkage in the molecule, with (C2) a compound having, in the molecule, at least one functional group selected from the group consisting of C—C double bond, epoxy group, alcoholic hydroxyl group and carbonyl group, and at least one functional group selected from the group consisting of epoxy group, phenolic hydroxyl group, amino group, cyanate ester group and isocyanate group, and having a phosphorus content of 0.3% by weight to 8% by weight. This resin composition has high flame retardancy without using any halogen compound and does not impair the properties of an article to which the composition is applied.

## Claims

### Claim 1

A laminated sheet composed of a flame-retardant resin composition comprising:
(A) an epoxy resin other than halogenated epoxy resins, having at least two epoxy groups in the molecule,
(B) a curing agent, and
(C) a product obtained by reacting (C1) a phosphorus compound having at least one P-H linkage in the molecule, with (C2) a compound having, in the molecule, at least one functional group selected from the group consisting of C—C double bond, epoxy group, alcoholic hydroxyl group and carbonyl group, and at least one functional group selected from the group consisting of epoxy group, phenolic hydroxyl group, amino group, cyanate ester group and isocyanate group, and having a phosphorus content of 0.3% by weight to 8% by weight, and
(D) a substrate.

### Claim 2 (depends on 1)

The laminated sheet according to claim 1, wherein the substrate is a glass cloth.

### Claim 3 (depends on 1)

The laminated sheet according to claim 1, wherein said laminated sheet is metal-clad.

### Claim 4 (depends on 3)

The laminated sheet according to claim 3, wherein the sheet is copper-clad.

### Claim 5 (depends on 1)

The laminated sheet according to claim 1, wherein a solvent dissolving said flame-retardant resin composition in the producing process of said laminated sheet is at least one member selected from the group consisting of a ketone, an aromatic hydrocarbon, a glycol ether, an ester, a dialkyl glycol ether, an amide, and an alcohol.