Nonflammable olefin thermoplastic elastomer composition laminate sheet made therefrom and uses of the composition and the laminate

• Main Authors: NAKAUCHI, TOYOKAZU, ARAI, AKINORI, NOZOKIDO, YUTAKA, AKITAYA, SHINICHI
• Format: Patent
• Language: English; French; German
• Published: 24.05.2000
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

A nonflammable olefin thermoplastic elastomer composition (F) for use in skins of interior automotive trim, which comprises 100 parts by weight of an oil-extended olefin thermoplastic elastomer composition (G), 25 to 50 parts by weight of melamine-coated ammonium polyphosphate (h), 8 to 17 parts by weight of a specified 1,3,5-triazine derivative, and 0.1 to 3 parts by weight of a lubricant (f), wherein the composition (G) comprises 100 parts by weight of an olefin thermoplastic elastomer composition (D) and 10 to 30 parts by weight of a mineral oil (e), the composition (D) comprising 50 to 70% by weight of an ethylene/ alpha -olefin copolymer elastomer (A) having a Mooney viscosity (ML1+4(100 DEG C)) of 40 to 100, 35 to 21% by weight of a polypropylene resin (B) having a crystal melting point of 140 to 165 DEG C and an ethylene unit content of 1 to 2% by weight and 15 to 9% by weight of a low-density polyethylene resin (C) having a density of 0.90 to 0.93 g/cm and a crystal melting point of 102-118 DEG C. The composition (F) exhibits excellent primary formability in calendering and postformability, for example, in embossing and vacuum and pressure formings, and produces shaped items having flexibility and flame resistance suited for use in interior automotive trims and the generation of corrosive and toxic gases therefrom attributed to thermal decomposition in fire, etc. is extremely slight. This invention is also directed to a laminate comprising a foamed polyolefin resin sheet and a flame-resistant sheet of the above-described composition. This composition and the laminate may be used as a skin of interior automotive trim.