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Fiber reinforced polypropylene resin composition, molding material and prepreg

A polypropylene resin and fiber-reinforced technology, applied in carbon fiber, fiber processing, thin material processing, etc., can solve problems such as difficulties in molding products, lack of interface adhesion between polypropylene resin and reinforced fibers, and difficulty in obtaining molded products with mechanical properties , to achieve the effects of good interface adhesion, excellent mechanical properties, and excellent water degradation resistance

Active Publication Date: 2014-09-24
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, polypropylene resin lacks interfacial adhesion with reinforcing fibers, making it difficult to obtain molded products with excellent mechanical properties
Among them, it is particularly difficult to obtain molded products with excellent mechanical properties when fibers lacking surface reactivity such as carbon fibers are used as reinforcing fibers

Method used

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  • Fiber reinforced polypropylene resin composition, molding material and prepreg
  • Fiber reinforced polypropylene resin composition, molding material and prepreg
  • Fiber reinforced polypropylene resin composition, molding material and prepreg

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0268] Hereinafter, the present invention will be described in more detail by way of examples.

[0269] (various measurement methods)

[0270] First, methods for measuring various properties used in Reference Examples, Examples, and Comparative Examples will be described.

[0271] (1) Determination of various physical properties of modified polypropylene

[0272]

[0273] Based on ASTM D1238, the measurement was carried out at 230° C. under a load of 2.16 kg.

[0274]

[0275] Number average molecular weight (Mn) is determined by gel permeation chromatography (GPC). As a measuring device, Gel Permeation Chromatography Alliance GPC-2000 manufactured by Waters Co., Ltd. was used, and the measurement was performed as follows. Two pieces of TSKgel GMH6-HT and two pieces of TSKgel GMH6-HTL were used as separation columns. The column dimensions are all 7.5 mm in diameter and 300 mm in length, and the column temperature is 140°C. As a mobile phase, o-dichlorobenzene (Wako Pure...

reference example 1

[0428] 1 part by mass of maleic anhydride (manufactured by Wako Pure Chemical Industries, Ltd., hereinafter abbreviated as MAH), 2,5-dimethyl-2,5- 0.25 parts by mass of bis(tert-butylperoxy)hexyne-3 (manufactured by NOF Corporation, trade name PERHEXINE (registered trademark) 25B), using a twin-screw kneader (manufactured by Nippon Steel Works, TEX-30, L / D=40, using a vacuum vent), extrusion at a cylinder temperature of 220°C, a screw rotation speed of 200rpm, and a discharge rate of 80g / min to obtain maleic acid-modified polypropylene (hereinafter abbreviated as MAH-PP1) . The obtained MAH-PP1 was dissolved in xylene, and then the obtained xylene solution was poured into acetone, whereby MAH-PP1 was reprecipitated and purified. The amount of grafted maleic anhydride was measured by IR and found to be 0.7% by mass. The number average molecular weight (Mn) was measured by GPC and found to be Mn28,000. For MAH-PP1, the value of Mn / {(100-M)×f / M} is 2.0.

[0429] In the formu...

reference example 2

[0434] In the production of maleic acid-modified polypropylene in Reference Example 1, MAH was set to 0.05 parts by mass, PERHEXINE25B was set to 0.02 parts by mass, and the cylinder temperature of the twin-screw kneader was set to 260°C , except that, in the same manner as in Reference Example 1, a maleic acid-modified polypropylene (hereinafter abbreviated as MAH-PP2) was obtained. The amount of grafted maleic anhydride in the obtained MAH-PP2 was measured by IR and found to be 0.03% by mass. The number average molecular weight (Mn) was measured by GPC and found to be Mn29,000. For MAH-PP2, the value of Mn / {(100-M)×f / M} is 0.09.

[0435] In the formula,

[0436] f: The molecular weight of maleic anhydride is 98 (g / mol)

[0437] M: content of maleic anhydride 0.03 (wt%)

[0438] Mn: The number average molecular weight of MAH-PP2 is 29,000.

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Abstract

An objective of the present invention is to obtain a molded article with excellent mechanical properties and water degradation resistance by using: a fiber reinforced polypropylene resin composition that contains a carbodiimide modified polyolefin (a), a polypropylene resin (b) and reinforced fiber (c), wherein the content of carbodiimide group in the resin component in the fiber reinforced polypropylene resin composition is 0.0005 to 140 mmol with respect to 100 g of a matrix resin component, and the reinforced fiber (c) is sized by a polyfunctional compound (s); and a molding material using the same.

Description

technical field [0001] The present invention relates to fiber-reinforced polypropylene resin compositions, molding materials suitable for injection molding, and prepregs useful for obtaining fiber-reinforced composite materials. Background technique [0002] Compositions formed of reinforcing fibers and thermoplastic resins are widely used in sporting goods, aerospace and general industrial applications due to their light weight and excellent mechanical properties. As reinforcing fibers used in these fiber-reinforced thermoplastic resin compositions, metal fibers such as aluminum fibers and stainless fibers; organic fibers such as aramid fibers and PBO fibers; inorganic fibers such as silicon carbide fibers; carbon fibers and the like are used. From the viewpoint of the balance of specific strength, specific rigidity, and lightness, carbon fibers are preferable, and among them, polyacrylonitrile-based carbon fibers are particularly preferably used. [0003] When molding a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/36C08J5/06C08K7/06C08L23/10
CPCY10T428/249948C08J5/042C08J5/043Y10T428/249944C08J2423/00C08J2323/12C08L23/10C08J2423/36Y10T428/2929C08L23/0846C08L23/26C08J5/06C08J2423/14C08L53/00C08J2353/00C08K2201/004C08L2205/035C08L2205/03C08L2205/025C08J5/248C08L23/12C08K9/04C08K7/06C08L45/00C08L23/0815C08L53/02C08L51/06B29B7/88B29B7/90D06M15/55D10B2101/06D06M2101/40
Inventor 佐野健太郎平野启之本间雅登土谷敦岐
Owner TORAY IND INC
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