Unlock instant, AI-driven research and patent intelligence for your innovation.

Rubber composition capable of foaming process and vulcanized rubber foaming mould product

A technology of foaming rubber and composition, which is applied in the field of foamable rubber composition, and can solve the problems of polluting molds, reducing performance, and reducing the performance of molded products, etc.

Inactive Publication Date: 2003-03-05
MITSUI CHEM INC
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the use of low molecular weight ethylene / α-olefin / diene copolymers reduces properties, especially strength of molded parts
On the other hand, the use of high molecular weight ethylene / α-olefin / diene copolymers blended with a large amount of process oil can cause contamination of the mold due to oil bleeding or insufficient vulcanization, thereby reducing the properties of the molded product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rubber composition capable of foaming process and vulcanized rubber foaming mould product
  • Rubber composition capable of foaming process and vulcanized rubber foaming mould product
  • Rubber composition capable of foaming process and vulcanized rubber foaming mould product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Example 1 In a 1.7-liter Banbury mixer (manufactured by Kobe Seikosho K.K.), the following ingredients were kneaded at 145° C. for 5 minutes: 100 parts by weight of ethylene / propylene / 5-ethylidene-2-norbornene copolymer (EPT (1 )), 20 parts by weight of 1-butene polymer having a melting point (Tm, determined by DSC) of 120°C and a melt flow rate (ASTM D1283, 190°C, 2.16kg load) of 0.6g / 10min, 5 parts by weight Zinc white, 2 parts by weight of stearic acid, 80 parts by weight of SRF carbon black (trade name: Asahi #5, produced by Asahi Carbon K.K.) and 40 parts by weight of paraffin processing oil (trade name: Diana processing oil PW-380, Idemitsu Kosan Co. ., Ltd. produced).

[0100] EPT(1)

[0101] The molar ratio of ethylene to propylene = 72 / 28

[0102] Intrinsic viscosity (η) (measured in decalin at 135°C) = 1.0d / g

[0103] Iodine value = 22

[0104] Add 0.5 parts by weight of 2-mercaptobenzothiazole (vulcanization accelerator, trade name: Sanceler M, produced...

Embodiment 2

[0109] The steps of Example 1 were repeated except that a propylene / ethylene / 1-butene copolymer with a melting point (Tm) of 138° C., a molar content of ethylene of 3%, and a molar content of 1-butene of 2% was used Instead of 1-butene polymer.

[0110] The results are listed in Table 1.

Embodiment 3

[0115] In a 1.7-liter Banbury mixer (manufactured by Tyo Seiki Seisakusho K.K.), the following ingredients were kneaded at 140° C. for 5 minutes: 70 parts by weight of EPT (1) used in Example 1, 30 parts by weight of ethylene / propylene / 5- Ethylene-2-norbornene copolymer (EPT(2)), 20 parts by weight, melting point (Tm, measured by DSC) of 120°C, melt flow rate (ASTM D1283, 190°C, load of 2.16 kg) of 0.6g / 10min of 1-butene polymer, 5 parts by weight of zinc white, 1 part by weight of stearic acid, 72 parts by weight of SRF-HS carbon black (trade name: Asahi #5OH, Asahi Carbon K.K. is produced) and 72 parts by weight Paraffin processing oil (trade name: Diana processing oil PW-380, manufactured by Idemitsu Kosan Co., Ltd.).

[0116] EPT(2)

[0117] The molar ratio of ethylene to propylene = 78 / 22

[0118] Intrinsic viscosity (η) (measured in decalin at 135°C) = 3.3d / g

[0119] Iodine value = 12

[0120] Add 0.5 parts by weight of 2-mercaptobenzothiazole (vulcanization acceler...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Melt flow velocityaaaaaaaaaa
Melting pointaaaaaaaaaa
Login to View More

Abstract

Disclosed is a foam processable rubber composition which comprises an ethylene / alpha -olefin of 3 to 20 carbon atoms / non-conjugated polyene copolymer rubber (A), a crystalline polyolefin resin (B) and a foaming agent (C), in specific proportions. A vulcanized rubber foam-molded product can be obtained by vulcanizing and foaming the rubber composition is also disclosed. The rubber composition can provide vulcanized rubber foam-molded products having excellent vulcanization properties such as weathering resistance, heat resistance, ozone resistance and tear strength. Besides, the rubber composition exhibits excellent precision moldability and productivity in transfer molding, injection molding and cast molding.

Description

field of invention [0001] The present invention relates to a foamable processable rubber composition capable of producing vulcanized rubber foam moldings (sponge rubber) which have excellent vulcanization properties such as heat resistance, weather resistance, ozone resistance and strength, and which are excellent in die casting , Injection molding and casting molding exhibit excellent precision moldability and productivity. The present invention also relates to vulcanized rubber foam moldings obtained from the above rubber composition. Background of the invention [0002] Ethylene / α-olefin copolymers and ethylene / α-olefin / diene copolymers have no unsaturated bonds in the main chain, so they have better weather resistance, heat resistance and ozone resistance than diene rubber, and they are called Widely used in rubber products such as automotive industry parts, industrial rubber parts, electronic insulation materials, civil engineering and construction...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L23/16
CPCC08L23/16C08L2203/14C08L2312/00C08K3/06C08K5/09C08K5/20C08K5/39C08K5/47C08L23/20C08L91/00C08L2205/02C08L2205/025C08L2666/04C08L23/0823C08L23/02C08J9/0061C08J5/00C08L2201/02C08L2201/08
Inventor 川崎雅昭野中修一国実正雄神田拓东条哲夫
Owner MITSUI CHEM INC