Polyolefin resin composition and process for producing same

A technique for polyolefin resins and compositions, which is applied in the field of polyolefin resin compositions and their manufacture, and can solve the problems of poor operability, tensile elastic modulus and linear expansion rate that do not show clear physical property values, and low surface appearance, etc. question

Active Publication Date: 2013-03-13
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the resin composition did not show clear physical property values ​​in terms of tensile elastic modulus, linear expansion rate, etc.
[0009] In addition, the above-mentioned resin composition contains a fibrous filler, and the fibrous filler has a problem of poor handleability, and a molded product molded using the resin composition has a problem of low surface appearance.

Method used

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  • Polyolefin resin composition and process for producing same
  • Polyolefin resin composition and process for producing same
  • Polyolefin resin composition and process for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Polypropylene (trade name "J-721GR" manufactured by Prime Polymer Co., Ltd., tensile elastic modulus: 1.2 GPa, linear expansion coefficient: 11 × 10 -5 / K) 100 parts by weight, exfoliated graphite (trade name "XGnP-5" manufactured by XG SCIENCE Co., Ltd., the average value of the size of the graphene flakes along the plane direction: 5 μm, the number of laminated graphene flakes: 180 layers, the amount of carbon element : 96.1atm%) 5 parts by weight and a styrene-ethylene / propylene-styrene block copolymer (trade name "Septon SEPS 2063" manufactured by KURARAY Co., Ltd.) as a compound having a six-membered ring skeleton, the content of the styrene component: 13 % by weight) 5 parts by weight are supplied to the extruder for melting and kneading to make a polyolefin resin composition, and the polyolefin resin composition is extruded from a T die installed at the front end of the extruder to obtain a thickness of 0.5 mm polyolefin resin sheet.

Embodiment 2

[0093] Use 5 parts by weight of styrene-ethylene / propylene-styrene block copolymer (trade name "Septon S2104" manufactured by KURARAY Co., Ltd., content of styrene component: 65% by weight), instead of styrene-ethylene / propylene-styrene block copolymer. Segment copolymer (trade name "Septon SEPS 2063" manufactured by KURARAY Co., Ltd., content of styrene component: 13% by weight) was obtained in the same manner as in Example 1 except that 5 parts by weight were used as a compound having a six-membered ring skeleton. Polyolefin resin sheet.

Embodiment 3

[0095] Use 5 parts by weight of styrene-ethylene / butylene-styrene block copolymer (trade name "Septon S8007" manufactured by KURARAY Co., Ltd., content of styrene component: 30% by weight) instead of styrene-ethylene / propylene-styrene block copolymer. Segment copolymer (trade name "Septon SEPS 2063" manufactured by KURARAY Co., Ltd., content of styrene component: 13% by weight) was obtained in the same manner as in Example 1 except that 5 parts by weight were used as a compound having a six-membered ring skeleton. Polyolefin resin sheet.

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Abstract

Provided is a polyolefin resin composition which can give molded articles having a high tensile modulus and a low coefficient of linear expansion. The polyolefin resin composition is characterized by comprising a polyolefin resin, graphite flakes, and a compound having a six-membered-ring skeleton and / or a compound having a five-membered-ring skeleton. The graphite flakes hence have been evenly dispersed in the polyolefin resin. Consequently, molded articles obtained from the polyolefin resin composition are excellent in terms of mechanical strength including tensile modulus and have a low coefficient of linear expansion and hence excellent dimensional stability. The polyolefin resin composition can hence be used in various applications including exterior plate materials for motor vehicles and substitutes for steel sheets.

Description

technical field [0001] The present invention relates to a polyolefin resin composition and a manufacturing method thereof. Background technique [0002] In recent years, exfoliated graphite obtained by exfoliating graphite from between layers (graphene flakes) has attracted attention as a substance having a carbon skeleton and high shape anisotropy. Since exfoliated graphite itself has high hardness, it can be expected to be effective as a reinforcing material by mixing it with a synthetic resin. It is generally believed that whether it is possible to obtain a larger specific surface area by repeatedly peeling off between graphene flakes of exfoliated graphite, reduce the amount of exfoliated graphite, and reduce the increase in specific gravity and brittleness of synthetic resins containing exfoliated graphite. Risks such as loss are kept to a minimum. In addition, since the same effect is expected for the expression of various functions, various studies have been conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08K3/04C08L25/08C08L53/00C08L71/00
CPCC08L23/12C08L53/025C08L71/02C08L23/10C08L23/02C08L53/02C08K3/04C08L71/10C08K3/042
Inventor 高桥克典向畑大辅谷口浩司鸣田弥野里省二永谷直之津村健辅泽和洋
Owner SEKISUI CHEM CO LTD
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