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Foamed rubber and preparation method thereof

A foaming rubber and foaming agent technology, applied in the field of foaming rubber, can solve the problems of low viscosity of foaming rubber, insufficient foaming pores, uneven foaming pores, etc., and achieve uniform foaming pores and sufficient foaming pores. Effect

Inactive Publication Date: 2012-06-13
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a new type of foamed rubber, which overcomes the lack of foaming holes in the foamed rubber in the prior art, the unevenness of the foaming holes, the insufficient hardness and density of the foamed rubber, and the foaming Due to the low viscosity of rubber, the foamed rubber of the present invention can be applied to many high-density fields

Method used

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  • Foamed rubber and preparation method thereof

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preparation example Construction

[0061] The present invention also provides the preparation method of above-mentioned foamed rubber, it comprises:

[0062] In the first step, the EPDM rubber, the polyethylene glycol di(meth)acrylate oligomer with the weight average molecular weight of 200-400 and the azobisisobutyronitrile in a torque flow Plasticizing in the variable instrument for 10 minutes to 20 minutes, the plasticizing temperature is 60°C-70°C;

[0063] In the second step, the surface-modified silicon dioxide, the azodicarbonamide, the montmorillonite, the gallic acid foaming agent and the bis(peroxide) tert-butyl) dicumyl vulcanizing agent is added to the torque rheometer, the temperature is raised to 165°C-175°C, banburying is carried out for 20-40 minutes, and then the temperature is lowered and the material is discharged to obtain the foamed rubber .

Embodiment 1

[0071] 5g of octadecyltrimethoxysilane (Shanghai Bowman Biotechnology Co., Ltd.) and 100g of 40nm silicon dioxide (produced by Nalco Chemical Company) were stirred and mixed in 500mL of 1-methoxy-2-propanol solution, Stand still for 12 hours under the condition of 75° C.-90° C., and then dry under the condition of 135° C. to obtain surface-modified silicon dioxide with a particle size of 41.3 nm.

Embodiment 2

[0073] At room temperature, 100g EPDM Mitsui EPT4045 (produced by Japan Mitsui Petrochemical Company), the content of the third monomer ethylidene norbornene in this EPDM rubber is 8%, 10g weight average molecular weight is 330 Polyethylene glycol di(meth)acrylate oligomer (produced by Shanghai Kangliang Chemical Co., Ltd.) and 0.25g described azobisisobutyronitrile (Zibo Chunwangda Chemical Co., Ltd.) in the torque rheometer Plasticating for 15 minutes, the plasticizing temperature is 65°C; the surface-modified silicon dioxide prepared in 0.5g embodiment 1, 4.75g of the azodicarbonamide (produced by Kunming Jinyang Chemical Industry Co., Ltd.), 2g of the Described montmorillonite (produced by Xinyang Jiaxin Bentonite Factory), 0.5g described gallic acid foaming aid and 3g described bis(tert-butyl peroxide) dicumyl vulcanizing agent (produced by Zibo Shengying Chemical Co., Ltd.) Add it into the torque rheometer, increase the temperature to 165°C, banbury for 20 minutes, then ...

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Abstract

The invention provides foamed rubber. The foamed rubber comprises ethylene propylene diene monomer, montmorillonite, polyethylene glycol-di(meth)acrylate oligomer, surface-modified silicon dioxide, an organic foaming agent mixture, a gallic acid foaming additive and a vulcanizing agent di(tert-butyl peroxide)-diisopropylbenzene, wherein the weight average molecular weight of the polyethylene glycol-di(meth)acrylate oligomer is 200-400, the particle diameter of the surface-modified silicon dioxide is 30-50 nm, the organic foaming agent mixture is formed by azodicarbonamide and azobisisobutyronitrile, and the weight ratio between the azodicarbonamide and the azobisisobutyronitrile is 90:10 to 95:5. Compared with the prior art, the foamed rubber provided by the invention has the advantages of sufficiency in foamed pores, evenness in foamed pores, high hardness and density, and higher viscosity, and thus, the foamed rubber can be applied to a lot of precise instruments.

Description

technical field [0001] The invention belongs to the field of rubber materials, in particular to a foam rubber. Background technique [0002] Foam rubber refers to the treatment of rubber with a specific foaming agent so that the rubber has characteristic properties. The obtained rubber is foam rubber, also known as sponge rubber. Due to the advantages of low cost, wide applicability and good weather resistance, foam rubber is used in various fields such as automobiles, ships, construction, road transportation, rail transportation, printing and dyeing, etc. Although the original foamed rubber has good tensile strength, good elastic recovery, and a small amount of viscoelasticity, the foam cells are insufficient, the foam cells are uneven, the hardness and density of the product are not up to standard, and the closed cells will change. Formed holes, micropores become small holes, some parts collapse or some parts cannot rise, or the surface viscosity is not enough for applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K13/06C08K9/06C08K3/36C08K3/34C08K5/14C08J9/10
Inventor 刘欣赵玉凯
Owner SHANDONG UNIV OF SCI & TECH
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