Filled thermoplastic polymer compositions

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524425, 524427, 524436, 524437, 524456, 524505, C08K 326, C08K 310, C08K 322

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active

048473170

ABSTRACT:
Filled thermoplastic compositions are disclosed. The compositions comprise (a) 30 to 90 parts of homopolymers of ethylene and/or copolymers of ethylene and C3-C10 alpha-olefins, (b) 10 to 70 parts of homopolymers of ethylene and/or copolymers of ethylene and C4-C10 alpha-olefins modified by grafting with ethylenically unsaturated carboxylic acids or anhydrides thereof, the blend of (a) and (b) having a melt index of less than 15 dg/min. and (c) 20 to 70 percent, based on the amount of (a) and (b) of a filler. The filler is selected from magnesium hydroxide, calcium hydroxide, aluminum trihydrate and hydroxyl-containing carbonates of at least one of magnesium and calcium, and mixtures thereof. The compositions exhibit a useful combination of stiffness and toughness, especially as measured by impact strength and tensile strength.

REFERENCES:
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patent: 3956230 (1976-05-01), Gaylord
patent: 4031062 (1977-06-01), Shirayama et al.
patent: 4338228 (1982-07-01), Inoue et al.
patent: 4387188 (1983-06-01), Statz
patent: 4420580 (1983-12-01), Herman et al.
patent: 4433073 (1984-02-01), Sano et al.
patent: 4477617 (1984-10-01), Murphy
patent: 4487885 (1984-12-01), Adur et al.
Derwent ABS C85-132604 (85-306737/49) J60212441 Oct. 1985 Mitsui Petro Ind KK.

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