Thermoplastic resin composition having high impact strength

Claim 2

A thermoplastic composition consisting essentially of a mixture of: (a) 100 parts by weight of at least one thermoplastic resin selected from the group consisting of polyethylene, polypropylene, polybutylene, polystyrene, vinyl acetate-ethylene copolymers, butadiene-styrene copolymers, and homo- and copolymers of acrylic acid; and (b) 5-60 parts by weight of particulate mica filler premixed in the absence of a thermoplastic resin with 0.1-2 parts by weight of at least one ingredient selected from the group of (i) polybutylenes having a melting point below about 100° F.; (ii) fatty acid metal salts of the formula: (RCOO).sub.n M wherein R is an alkyl or alkenyl radical having from 9 to 25 carbon atoms, M is a Group IA, IIA, or IIB metal; and n is the valence of M; and (iii) mineral oils.

Claim 3

A thermoplastic composition according to claim 1 consisting essentially of 100 parts by weight of said thermoplastic resin and 10-50 parts by weight of said mica premixed with 0.2-1 parts by weight of said ingredient.

Claim 4

A composition according to claim 1 wherein said thermoplastic resin is polyethylene having a melt index within the range of about 1 gram/10 minutes as defined by ASTM 1238-65T, Condition F to about 200 grams/10 minutes as defined by ASTM 1238-65T, Condition E.

Claim 5

A composition according to claim 1 wherein said mica has a particle size between about 1 to 500 microns.

Claim 6

A composition according to claim 4 wherein said mica has a particle size between about 10 to 200 microns.

Claim 7

A composition according to claim 1 wherein said polybutylene is polyisobutylene.

Claim 8

A composition according to claim 1 wherein said fatty acid metal salt is zinc stearate.

Claim 9

A composition according to claim 1 wherein said mineral oil is a naphthenic extender oil.

Claim 10

A composition according to claim 1 consisting essentially of polyethylene blended with an admixture of mica and polyisobutylene.

Claim 11

A composition according to claim 1 consisting essentially of polyethylene blended with an admixture of mica and zinc stearate.

Claim 12

A composition according to claim 1 consisting essentially of polyethylene blended with an admixture of mica and naphthenic extender oil.

Claim 13

A process for making a high impact resistant thermoplastic composition comprising: (a) mixing in the absence of a thermoplastic resin 5-60 parts by weight of particulate mica filler with 0.1-2 parts by weight of at least one ingredient selected from the group consisting of: (i) polybutylenes having a melting point below about 100° F.; (ii) fatty acid metal salts of the formula: (RCOO).sub.n M wherein R is an alkyl or alkenyl radical having from 9 to 25 carbon atoms, M is a Group IA, IIA, or IIB metal; and n is the valence of M; and (iii) mineral oils; and (b) thereafter blending 100 parts by weight of at least one thermoplastic resin selected from the group consisting of polyethylene, polypropylene, polybutylene, polystyrene, vinyl acetate-ethylene copolymers, butadienestyrene copolymers, and homo- and copolymers of acrylic acid with the resulting mixture of 1(a).

Claim 14

A process for making a high impact resistant thermoplastic composition comprising: (a) mixing in the absence of a thermoplastic resin 5-60 parts by weight of particulate mica filler with 0.1-2 parts by weight of at least one ingredient selected from the group consisting of: (i) polybutylenes having a melting point below about 100° F.; (ii) fatty acid metal salts of the formula: (RCOO).sub.n M wherein R is an alkyl or alkenyl radical having from 9 to 25 carbon atoms, M is a Group IA, IIA, or IIB metal; and n is the valence of M; and (iii) mineral oils; and (b) thereafter blending 100 parts by weight of at least one thermoplastic resin selected from the group consisting of polyethylene, polypropylene, polybutylene, polystyrene, vinyl acetate-ethylene copolymers, butadienestyrene copolymers, and homo- and copolymers of acrylic acid with the resulting mixture of 1(a).

Claim 15

A process according to claim 12 employing 10-50 parts by weight of said mica and 0.2-1 parts by weight of said ingredient.

Claim 16

A process according to claim 13 wherein said thermoplastic resin is polyethylene having a melt index within the range of about 1 gram/10 minutes as defined by ASTM 1238-65T, Condition F to about 200 grams/10 minutes as defined by ASTM 1238-65T, Condition E.

Claim 17

A process according to claim 12 wherein said mica has a particle size between about 1 to 500 microns.

Claim 18

A process according to claim 15 wherein said mica has a particle size between about 10 to 200 microns.

Claim 19

A process according to claim 12 wherein said polybutylene is polyisobutylene.

Claim 20

A process according to claim 12 wherein said fatty acid metal salt is zinc stearate.

Claim 21

A process according to claim 12 wherein said mineral oil is a naphthenic extender oil.

Claim 22

A process according to claim 12 wherein polyethylene is blended with an admixture of mica and polyisobutylene.

Claim 23

A process according to claim 12 wherein polyethylene is blended with an admixture of mica and zinc stearate.

Claim 24

A process according to claim 12 wherein polyethylene is blended with an admixture of mica and naphthenic extender oil.