# US 4,397,976 A · Interlayer for laminated safety glass

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,397,976 A
- Document ID: US4397976A
- Status: Granted
- Kind: A
- Application number: 06/285,437
- Filed: 1981-07-21
- Granted: 1983-08-09
- Earliest claimed: 1979-05-31
- Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha; Tokuyama Sekisui Kogyo Kabushiki Kaisha
- Inventors: Takeshi Mori; Toshiyuki Takashima; Kenichi Asahina; Toshiharu Matsumiya; Ariyasu Sugita
- Web page: https://patentgrep.com/patent/US4397976A

## CPC

- B32B 17/1055: {characterized by the resin layer, i.e. interlayer}
- C08K 5/0016: {Plasticisers}
- Y10T 428/31645: Next to addition polymer from unsaturated monomers
- Y10T 428/31649: Ester, halide or nitrile of addition polymer
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A composition for an interlayer film of a laminated safety glass, said composition comprising (A) a thermoplastic resin resulting from copolymerization of (1) vinyl chloride, (2) glycidyl methacrylate and (3) at least one monomer selected from the group consisting of ethylenic hydrocarbons, vinyl esters of fatty acids, acrylic esters and vinyl ethers, and (B) a plasticizer.

## Claims

### Claim 1

An interlayer for a laminated safety glass, said interlayer comprising (A) a thermoplastic resin resulting from copolymerization of (1) 80 to 98.5% by weight of vinyl chloride, (2) 1 to 10% by weight of glycidyl methacrylate and (3) 0.5 to 10% by weight of ethylene, (B) 10 to 40% by weight of a plasticizer, and (C) 1 to 10 parts by weight of an organotin stabilizer per 100 parts by weight of said thermoplastic resin.

### Claim 2 (depends on 1)

An interlayer according to claim 1, having a thickness of at least 1.5 mm.