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Polyolefin resin composition and foam molded article

A technology of resin composition and polyolefin resin, applied in the fields of polyolefin resin composition and foam molding products, can solve the problems of color unevenness, color unevenness, etc., and achieve the effect of good appearance and suppressing color unevenness

Inactive Publication Date: 2010-06-30
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the addition of a light stabilizer and a blowing agent to the above resin composition and the following preparation of foam molded articles may lead to the occurrence of color unevenness caused by the interaction of the pigment with the blowing agent caused by agglomeration

Method used

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  • Polyolefin resin composition and foam molded article
  • Polyolefin resin composition and foam molded article
  • Polyolefin resin composition and foam molded article

Examples

Experimental program
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Effect test

preparation example Construction

[0032]The production method of the polyolefin resin (A) may be a production method using a conventionally known polymerization catalyst and a conventionally known polymerization method. Examples of polymerization catalysts include Ziegler type catalysts and Ziegler-Natta type catalysts. Additional examples include: a catalyst system consisting of an alkyl aluminoxane and a compound having a cyclopentadienyl ring of a transition metal of Group 4 of the Periodic Table; A catalyst system consisting of a compound of a cyclopentadienyl ring of a transition metal of Group 4, and a compound capable of reacting with a transition metal compound to form an ionic complex; and a catalyst obtained by supporting this catalyst system on inorganic particles or the like system.

[0033] Examples of the polymerization method include slurry polymerization or solvent polymerization by using an inert hydrocarbon solvent, liquid phase polymerization or gas phase polymerization without using a solv...

Embodiment

[0099] The present invention is described by referring to Examples and Comparative Examples, but the present invention is not limited to these Examples.

[0100] Methods for measuring physical properties of resin components and compositions used in Examples and Comparative Examples are described below.

[0101] (1) Melt flow rate (MFR: unit: g / 10 minutes)

[0102] The melt flow rate is measured according to the method provided in JIS K7210. Unless otherwise specified, the measurement is performed at a temperature of 230°C and a load of 21.2N.

[0103] (2) Ethylene content (unit: mass %); (C2') T

[0104] In Examples, a polypropylene resin (propylene-(propylene-ethylene) block copolymer) was used as the polyolefin resin (A). The ethylene content in the polypropylene resin was determined by preparing a pressed sheet of the material to be measured, measuring the infrared absorption spectrum of the sheet, and measuring the ethylene content by the obtained methyl (-CH 3 ) and m...

Embodiment 2-5

[0143] Regarding Examples 2-5, a flat plate having a size of 100 mm×400 mm×2 mm was obtained by using an injection molding machine SE130DU [registered trademark] manufactured by Sumitomo Heavy Industries, Ltd., at a molding temperature of 230° C., 40 °C mold cooling temperature, injection time of 6.8 seconds and cooling time of 30 seconds for molding.

[0144] [Polyolefin resin composition]

[0145] (A) Polyolefin resin (component A)

[0146] Propylene-(propylene-ethylene) block copolymer (A-1) and polyethylene resin (A-2) were used as the polyolefin resin.

[0147] A propylene-(propylene-ethylene) block copolymer was used as the polyolefin resin. Propylene-(propylene-ethylene) block copolymer (A-1) is a polypropylene-based copolymer consisting of: a copolymer component consisting of propylene (hereinafter, also referred to as polymer component (I )) and a copolymer component composed of propylene and ethylene (hereinafter, also referred to as copolymer component (II)).

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Abstract

A resin composition, comprising (A) a polyolefin resin, (B) a foaming agent, (C) a black pigment, and 0.05 to 5 parts by mass of (D) a hindered amine light stabilizer which satisfies the following requirements (a) and (b), provided that the content of the polyolefin resin (A) is let be 100 parts by mass: requirement (a): having a 2,2,6,6-tetramethylpiperidyl group represented by formula (I) that is attached to any of a carbon atom, an oxygen atom and a nitrogen atom: requirement (b): having an acid dissociation constant (pKa) of less than 8.

Description

technical field [0001] The present invention relates to a polyolefin resin composition and a foam molded article. Background technique [0002] Polypropylene resin compositions are materials excellent in rigidity, impact resistance, etc., and therefore, they are used in various applications in the form of molded articles, such as interior or exterior parts of automobiles and housings of electric appliances. Foam molding has been employed to save weight in shaped articles. In many shaped articles of such polypropylene resin compositions, the product is colored by adding a pigment in consideration of high designability. Therefore, it is necessary to suppress the occurrence of color unevenness in shaped articles, and many studies on the occurrence of color unevenness in shaped articles have been conducted. [0003] For example, JP 10-060184A discloses a polyolefin composition comprising a polyolefin (A) and a pigment (B), wherein the pigment (B) contains carbon black (B- 1),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L23/08C08L35/00C08L23/24C08K13/02C08K5/3435C08K3/04C08J9/08
CPCC08K3/04C08J2323/02C08K5/3435C08J9/0028C08J9/0066C08J9/08C08L23/02C08L2666/02
Inventor 丸山刚志
Owner SUMITOMO CHEM CO LTD
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