 Method of manufacturing a semiconductor device |
| What is claimed is: 1. A method of manufacturing a semiconductor device in which method a surface ... |
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| Supported nickel-cobalt-silica coprecipitated hydrogenation catalyst |
| What is claimed is: 1. A calcined and supported coprecipitated nickel-cobalt-silica catalyst ... |
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| Closure tab |
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| Device for shifting frozen specimen, for use in scanning type electron microscope |
| It is therefore an object of the invention to provide a device for use in scanning type electron ... |
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| Process for making filled articles from polymeric material |
| OF THE INVENTION The process of the present invention is applicable to the manufacture of hollow ... |
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| Process for polymerizing .alpha.-olefines |
| What is claimed is: 1. A process for preparing a polyolefin having a melt viscosity of from 100 to 1... |
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| Cationic polymerization catalyst |
| What is claimed is: 1. A cationic catalyst for the homopolymerization of isoolefins and ... |
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| Manufacture of particulate homopolymers or copolymers of ethylene |
| We claim: 1. A process for the manufacture of particulate ethylene homopolymers (HP) or ethylene ... |
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| Unsaturated imidazolines |
| We claim: 1. A vinyl addition copolymer of (1) a monomer having the formula ##STR14## wherein n and ... |
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| Method and apparatus for effecting fluid flow measurement in a single sensor |
| The invention having thus been described, the following is claimed: 1. A method for measuring the ... |
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Reinforced polypropylene composition
| Details |
Inventors: Koizumi, Junji; Yazaki, Yoshito;
Assignee: Toyoda Gosei Co., Ltd. (Nishikasugai, JP)
Primary Examiner: Michl; Paul R.
Assistant Examiner: Cain; Edward J.
Attorney, Agent or Firm: Cushman, Darby & Cushman
A reinforced polypropylene composition comprising from 50 to 80% by weight a resin component comprising from 35 to 90 parts by weight a crystalline polypropylene (A) from 5 to 60 parts by weight a polyethylene resin (B), and from 5 to 30 parts by weight an aromatic hydrocarbon resin (C), the sum of (A), (B), and (C) being 100 parts by weight; from 15 to 45% by weight talc (D); and from 1 to 40% by weight glass fiber (E); the sum of the talc and the glass fiber being not more than 50% by weight, wherein the percentages are based on the sum of (A)+(B)+(C)+(D)+(E). |
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DETAILED DESCRIPTION OF THE INVENTION In the crystalline polypropylene, a polypropylene, a modified polypropylene or a blend of both may be used.
As the polypropylene, a homopolypropylene, a propylene-ethylene random copolymer (comprising not more than 20% by weight ethylene), a propylene--ethylene block copolymer (comprising not more than 20% by weight ethylene), or a blend composed of at least two of the aforesaid can be used.
The modified polypropylene is produced by denaturalizing a polypropylene and an unsaturated carboxylic acid or the derivative thereof in the presence of an organic peroxide.
It is preferable that a blend of the polypropylene and the modified polypropylene be used as the crystalline polypropylene.
The crystalline polypropylene preferably contains the modified polypropylene in the amount of 1-20% by weight.
The melt flow index of the crystalline polypropylene is preferably within the range of 5-50.
When the melt flow index is less than 5, molding machinability and the external appearance of the molded product deteriorate, yet when it exceeds 50, impact resistance is lowered.
The crystalline polypropylene comprises 35-90 parts by weight of the resin component (A+B+C).
(The total amount of the resin component (A +B+C) is 100 parts by weight.
) The crystalline polypropylene is thus present in the amount of 17.
5-72% by weight based on the reinforced polypropylene composition.
This blending amount is determined according to the optimum combination of polyethylene resin with the aromatic hydrocarbon resin, talc, and glass fiber.
The polyethylene resin comprises 5-60 parts by weight of the resin component (A+B+C).
Thus, the polyethylene resin comprises 2.
5-48% by weight based on the reinforced polypropylene composition.
It is possible to use a combination of polyethylene resins such as high density polyethylene, low density polyethylene, and linear low density polyethylene.
The aromatic hydrocarbon resin is a petroleum resin represented by the following chemical structure (wherein R and R1 designate H or CH
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Adhesives and Rubbers 
