JPH0476061A - Imidesilicone polymer composition - Google Patents

Abstract

PURPOSE:To prepare the title compsn. having a high flame retardance, generating little black smoke, and useful for electric and electronic wiring while utilizing the excellent heat resistance, electrical properties, etc., inherent in an imidesilicone polymer by compounding the polymer with a metal oxide or boron nitride. CONSTITUTION:100 pts.wt. imidesilicone polymer (e.g. a block copolymer of a methylated silicone monomer with an imide) is compounded with 1-50 pts.wt. at least one compd. selected from the group consisting of a metal oxide (e.g. antimony trioxide or titanium dioxide) and boron nitride to give a flame- retardant resin compsn., which is highly flame-retardant and generates little black smoke even when burned while retaining the excellent heat resistance, electrical properties, etc., inherent in the polymer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an imidosilicon polymer composition used for wiring electrical and electronic equipment.

[Conventional technology]

Recently developed imidonoricone polymers are obtained, for example, by copolymerizing imide and silicone monomers, and generally have excellent heat resistance and electrical properties, and are used as materials for insulating layers in distribution lines for electrical and electronic equipment. It is seen as promising. However, it does not have sufficient flame retardancy and also has the problem of emitting a large amount of black smoke when burned.

[Issues that need to be solved]

Therefore, the present invention has developed a composition that uses an imidosilicon-based polymer as a base and is highly flame retardant while taking advantage of its excellent heat resistance and electrical properties, and generates little black smoke even when burned. It's about doing.

[Means to solve the problem]

The above-mentioned problem of the present invention is achieved by a flame-retardant resin composition characterized in that 1 to 50 parts by weight of at least one metal oxide or boron dinoide is blended with 100 parts by weight of an imidosilicon polymer. resolved.

The present inventors' studies on flame retardancy of imidosilicon polymers have shown that adding metal oxides, boron dioxide, etc. to imidosilicon polymers reduces soot during combustion without significantly impairing their unique properties. The amount generated is reduced, and at the same time, the self-extinguishing time is shortened and the degree of flame retardancy is increased.

The imidosolicone polymer used in the present invention is
Examples include bronch copolymers and random copolymers of imides and silicone monomers having alkyl groups such as methyl groups and aryl groups such as phenyl'JL, and copolymers in which imides are copolymerized with siloxine. One or more of these may be used.

Commercially available imidosilicon polymers include GE's S
ILTEM STM-1500, SILTEM-090
01,5 ILTE Sen 09000 etc. SIl, TEH 9
The 000 series is exemplified.

The imidosilicon polymer may be mixed with an etherimide polymer such as GE Ne1 (trade name 11LTEM) in an amount of 10 to 50 parts by weight per 100 parts by weight of the imidosilicon polymer.

The metal oxides used in the present invention include antimony oxides such as antimony dioxide, antimony dioxide, titanium oxides,
Cerium oxide, molybdenum oxide, tungsten oxide, boron oxide, zirconium oxide, bismuth oxide, iron oxide,
Neodymium oxide, samarium oxide, dysprosium oxide, magnesium oxide, zinc oxide, yttrium oxide, aluminum oxide, tellurium oxide, lithium oxide, rubidium oxide, cesium oxide, helium oxide, strontium oxide, barium oxide, scandium oxide, lanthanum oxide, lanthanum oxide praseodymium, europium oxide, gadolinium oxide, terbium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, lutetium oxide, hafnium oxide, vanadium oxide, niobium oxide,
Tantalum oxide, chromium oxide, manganese oxide, rhenium oxide, ruthenium oxide, osmium oxide, cohar oxide I-
Examples include rhodium monoxide, iridium oxide, nickel oxide, palladium oxide, platinum oxide, gallium oxide, indium oxide, taurium oxide, germanium oxide, and selenium oxide. Although there are slight differences in flame retardant effect,
Especially from a performance standpoint, antimony trioxide, antimony pentoxide, titanium dioxide, cerium oxide, tungsten trioxide,
Molybdenum dioxide, boron oxide, zirconium oxide, bismuth oxide, neodymium oxide, samarium oxide, etc. are effective. The particle size is preferably from 1 to 0.0 m, and a composition having excellent mechanical properties and moldability is preferably prepared.

The metal oxide or boron athenide is used in an amount of 1 to 50 parts by weight, preferably 5 to 50 parts by weight, based on 100 parts by weight of the imide/Lyon polymer (if both are used together, their total amount).
It is 15 parts by weight. If it is less than 1 part by weight, the effect of use will be small, and if it is more than 50 parts by weight, the tensile properties of the imidosilicon polymer will deteriorate.

EXAMPLES The present invention will be explained in more detail with reference to Examples and Comparative Examples.

Examples 1 to 10, Comparative Examples 1 to 2 The compositions shown in Table 1 were kneaded at 270 to 280°C using a Brabender Plastomill (Toyo Seiki Co., Ltd.), and then press-molded to a 0.05-degree. A sheet with a thickness of 6 mm was prepared.

Then, the sheet was crosslinked by irradiating electron beams at 15 Mrad from both sides of the sheet.

The crosslinked sheets obtained in Examples 1 to 10 and Comparative Examples 1 to 2 were tested for various properties shown in Table 1. Yumihari characteristics are AS
TM D 638, embrittlement temperature ASTM D746,
Volume resistivity is ASTM D257, flame retardant is UL 5
Each was evaluated according to Object 758.

The combustion flame was 6 mm wide and was assumed to disappear within 15 seconds after ignition, and the amount of soot generated at that time was visually observed. Items that generate less soot or have a shorter self-extinguishing time are rated as good.

The examples show that this flame retardancy is entirely good. The tensile strength is at least 1.0 kg/(11m2
If the elongation is at least 50χ, it is considered to be applicable as a wire coating material, and it passes these standards.

[F, margin]

Claims (1)

[Claims] (1) A flame-retardant resin composition comprising 1 to 50 parts by weight of at least one metal oxide or boron nitride to 100 parts by weight of an imidosilicon polymer.