JPH06329842A - Olefin resin composition - Google Patents

Abstract

PURPOSE:To provide the subject composition excellent in rigidity, mechanical strength and surface smoothness, capable of giving moldings with woodgrain- toned surface, thus useful for automotive trim core materials, etc., comprising an olefin resin and baked attapulgite. CONSTITUTION:The objective composition comprising (A) an olefinic resin (e.g. polyethylene, ethylene-propylene copolymer) and (B) baked attapulgite. It is preferable that the amount of the component B to be used be such as to be <=50wt.% based on the final composition when mechanical strength and surface smoothness are required, or 20-80wt.% based on the final composition in the case woodgrain-toned surface is required.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an olefin resin composition.

[0002]

2. Description of the Related Art Inorganic fillers such as glass fibers have been conventionally used for composite reinforcement of olefin resins, especially polypropylene resins. As an inorganic filler other than glass fiber, for example, Japanese Patent Publication No. 64-11217 and Japanese Patent Laid-Open No. 59-227936 disclose polypropylene resin compositions which are composite-reinforced with fibrous magnesium oxysulfate and the like. There is.

However, although the glass fiber reinforced polyolefin has excellent mechanical properties (impact resistance, bending strength, rigidity, etc.) of the obtained molded product, the glass fiber is exposed on the surface of the molded product and the surface smoothness is improved. There was a problem such as the decrease. Further, the polypropylene resin composition composite-reinforced with fibrous magnesium oxysulfate has a problem that a molded product having sufficient mechanical strength and rigidity cannot be obtained.

[0004]

The present invention has been made in view of the above problems, and an object thereof is an olefin resin composition capable of obtaining a molded article excellent in rigidity, mechanical strength and surface smoothness. To provide things.

[0005]

The olefin resin composition of the present invention comprises an olefin resin and a calcined attapulgite. Examples of the olefin-based resin include homopolymers and copolymers of α-olefins; copolymers of α-olefins and diolefins; copolymers of ethylene or α-olefins and unsaturated carboxylic acid esters. To be

Examples of the α-olefin include ethylene, propylene, butene, hexene, octene and decene.

The α-olefin homopolymers and copolymers include, for example, polyethylene, polypropylene, ethylene-propylene copolymers, ethylene-butene-1 copolymers; ethylene and 4-methylpentene-1.
And the like.

Further, examples of the above-mentioned copolymer of α-olefin and diolefin include a copolymer of ethylene and butadiene, a copolymer of propylene and butadiene, and the like.

Examples of the above-mentioned copolymer of α-olefin and unsaturated carboxylic acid ester include ethylene-vinyl acetate copolymer and the like. Each of the above (co) polymers may be used alone or in combination of two or more.

The fired apatartite used in the present invention is obtained by firing a needle-shaped magnesia-silica-alumina mineral apatargite, for example, 20.
It is used by calcination at 0 to 800 ° C. to remove contained water and then crushed.

When the molded body is required to have mechanical strength and surface smoothness, the amount of the fired apatargite used is preferably 50% by weight or less in the olefin resin composition.
Further, in order to obtain a molded product having a grain-like surface by using the calcined apatargite alone, the amount used is preferably 20 to 80% by weight in the olefin resin composition.

The polyolefin resin composition of the present invention contains a reinforcing material such as glass fiber, a lubricant, a plasticizer, a surfactant, and a coupling agent in order to improve dispersibility, resin interface adhesion and various physical properties. , UV absorber, antioxidant,
Flame retardants and the like may be added, and these are preferably 10% by weight or less in the above olefin resin composition.

[0013]

EXAMPLES Examples of the present invention will be described below. Example 1 70% by weight of a polypropylene resin (“MS624” manufactured by Tokuyama Soda Co., Ltd., a copolymer of ethylene and propylene) in a molten state in the extruder was subjected to silane coupling treatment from the side of the extruder and then baked. 30 wt% of apatargite (“EMCOR66” manufactured by ENGELHARD, average fiber length 0.5 μm) was supplied from the side surface of the extruder (zone where the resin is in a molten state) to extrude the sheet. In addition, "γ-aminopropyltrimethoxysilane" manufactured by Shin-Etsu Chemical Co., Ltd. was used for the silane coupling treatment.

(Embodiment 2) Silane coupling-treated ENGELHARD was used as a firing apattalite.
A sheet was extruded in the same manner as in Example 1 except that "EMCOR36" (average fiber length 1 µm) manufactured by the same company was used.

(Example 3) 70% by weight of polypropylene resin ("MS624" manufactured by Tokuyama Soda Co., Ltd.) was burned with apatartite ("EMCOR6 manufactured by ENGELHARD").
6 ”) and 25% by weight and 5% by weight of glass chopped strand (“ E Fiber ”manufactured by Nippon Electric Glass Co., average fiber length 6 mm, average diameter 9 μm) were added.
The sheet was extruded in the same manner as in.

Example 4 55% by weight of polypropylene resin (“MS624” manufactured by Tokuyama Soda Co., Ltd.) was burned with apatite (“EMCOR6” manufactured by ENGELHARD).
6 ") 45% by weight was added, and the sheet was extruded in the same manner as in Example 1.

(Comparative Example 1) Firing Apatartite (EN
Example 1 except that 30% by weight of glass chopped strand (“E Fiber” manufactured by Nippon Electric Glass Co., Ltd.) was used instead of GEMHARD “EMCOR66”).
The sheet was extruded in the same manner as in.

(Comparative Example 2) 5% by weight of glass chopped strand ("E Fiber" by Nippon Electric Glass Co., Ltd.) and fibrous magnesium oxysulfate (80% by weight of polypropylene resin ("MS624" by Tokuyama Soda Co., Ltd.)) Ube Industries, Ltd. "Mosheiji", average fiber length 30μ
m) A sheet was extruded as in Example 1 except that 15% by weight was used.

Comparative Example 3 Polypropylene resin (“MS624” manufactured by Tokuyama Soda Co., Ltd.) 39% by weight, and fibrous magnesium oxysulfate (“Mosheiji” manufactured by Ube Industries, average fiber length 30 μm) 30% by weight and talc Three
The sheet was extruded as in Example 1 except that 1% by weight was used.

Comparative Example 4 A sheet of polypropylene resin (“MS624” manufactured by Tokuyama Soda Co., Ltd.) was extruded.

[Measurement and Evaluation of Physical Properties] The sheets obtained in the above Examples and Comparative Examples were measured and evaluated for the following physical properties, and the results are shown in Table 1. However, Examples 1 to 1
No evaluation was made on the surface grain of No. 3 and only evaluation of the surface grain was performed on Example 4. (1) Bending strength It was measured according to JIS K7203. (2) Flexural modulus It was measured according to JIS K7203. (3) Abrasion resistance A test was conducted in accordance with JIS K7203, and those with a small amount of wear were evaluated as ◯ and those with a large amount of wear were evaluated as x. (4) Surface smoothness The surface of the sheet was visually observed and the smooth one was marked with ◯ and the uneven one was marked with x. (5) Surface woodgraining The surface of the sheet is visually observed, and if the woodgraining is ○,
Those with no wood grain were marked with x.

[0022]

[Table 1]

[0023]

The olefin resin composition of the present invention is as described above, and is excellent in rigidity, mechanical strength and surface smoothness, and by adjusting the amount of the fired apatargite used, a woodgrain tone is obtained. Since it provides a molded article having a surface,
It can be suitably used for a wide range of applications such as automobile interior core materials, electric products, and household goods.

Claims (1)

[Claims] 1. An olefin resin composition comprising an olefin resin and calcined attapulgite.