Composite material of polyolefin resin and filler and molded article made from the same
AssigneeSumitomo Chemical Company, Limited
InventorsKatsuhisa Kitano, Takashi Sanada
Life of this patent
Estimating the term…
Abstract
Disclosed are a composite material containing (A) a modified polyolefin resin graft-modified with an unsaturated carboxylic acid and/or its derivative and (B) a filler, wherein a content of the component (B) is from 1 to 80 parts by weight based on 100 parts by weight of a combined content of the components (A) and (B), a graft amount of the unsaturated carboxylic acid and/or its derivative in the component (A) is 0.3% by weight or more, and the component (A) has a melt flow rate as measured at 230° C. and a load of 21.2 N of 400 g/10 min or less and a composite material further containing (C) a polyolefin resin.
Claims19
A composite material comprising (A) a modified polyolefin resin graft-modified with an unsaturated carboxylic acid and/or its derivative and (B) a filler, wherein a content of the component (B) is from 1 to 80 parts by weight based on 100 parts by weight of a combined content of the components (A) and (B), a graft amount of the unsaturated carboxylic acid and/or its derivative in the component (A) is 0.3% by weight or more, and the component (A) has a melt flow rate as measured at 230° C. and a load of 21.2 N of 400 g/10 min or less.
A method for producing a composite material comprising the steps (1) to (3) defined below:
- (1) a step of melt kneading (A) a modified polyolefin resin graft-modified with an unsaturated carboxylic acid and/or its derivative, the modified polyolefin resin having a graft amount of the unsaturated carboxylic acid and/or its derivative of 0.3% by weight or more and a melt flow rate as measured at 230° C. and a load of 21.2 N of 400 g/10 min;
- (2) a step of impregnating (B) a continuous filler with the molten component (A) obtained in step (1) so that a content of the component (B) becomes from 1 to 80 parts by weight based on 100 parts by weight of a combined content of the components (A) and (B), thereby forming a continuous strand;
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- (3) a step of cutting the continuous strand formed in step (2).
A composite material comprising (A) a modified polyolefin resin graft-modified with an unsaturated carboxylic acid and/or its derivative,. (B) a filler and (C) a polyolefin resin, wherein a weight ratio of the component (C) to the component (A) is from 99.9/0.1 to 60/40, a content of the component (B) is from 1 to 80 parts by weight based on 100 parts by weight of a combined content of the components (A), (B) and (C), a graft amount of the unsaturated carboxylic acid and/or its derivative in the component (A) is 0.3% by weight or more, and the component (A) has a melt flow rate as measured at 230° C. and a load of 21.2 N of 400 g/10 min or less.
A method for producing a composite material comprising the steps (1) to (3) defined below:
- (1) a step of melt kneading (A) a modified polyolefin resin graft-modified with an unsaturated carboxylic acid and/or its derivative and (C) a polyolefin resin so that a weight ratio of the component (C) to the component (A) becomes from 99.9/0.1 to 60/40, the modified polyolefin resin (A) having a graft amount of the unsaturated carboxylic acid and/or its derivative of 0.3% by weight or more and a melt flow rate as measured at 230° C. and a load of 21.2 N of 400 g/10 min;
- (2) a step of impregnating (B) a continuous filler with the molten mixture of the components (A) and (C) obtained in step (1) so that a content of the component (B) becomes from 1 to 80 parts by weight based on 100 parts by weight of a combined content of the components (A), (B) and (C), thereby forming a continuous strand;
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- (3) a step of cutting the continuous strand formed in step (2).
Dependencies are inferred from the claim text.