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Butyl rubber/poly(meth)acrylate blend composite damping material and process for preparing same

A technology of compound damping material and butyl rubber, which is applied in the fields of polymer synthesis and molding processing, can solve the problems of difficulty in meeting the application requirements of shock absorption and noise reduction, and achieves easy compounding with metal, improving bonding ability, and improving compatibility. Effect

Inactive Publication Date: 2005-08-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to Taiwan scholar Liao Fusheng reported in Polymer, 1994, 35 (12), in chlorinated butyl rubber / polypropylene blends, due to the effect of thermal stress, the liquid-liquid transition of polypropylene to butyl rubber (T H ) has an inhibitory effect, resulting in its maximum damping value tanδ max <0.35, it is difficult to meet the application requirements for shock absorption and noise reduction

Method used

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  • Butyl rubber/poly(meth)acrylate blend composite damping material and process for preparing same
  • Butyl rubber/poly(meth)acrylate blend composite damping material and process for preparing same
  • Butyl rubber/poly(meth)acrylate blend composite damping material and process for preparing same

Examples

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Effect test

Embodiment 1

[0033]Ethyl acrylate and butyl (meth)acrylate were polymerized according to the ratios in Table 1 at 25±2° C. according to conventional emulsion polymerization methods. After the reaction, four kinds of poly(ethyl acrylate-butyl methacrylate) copolymers were prepared respectively through washing, demulsification and drying. For the preparation of the poly(ethyl acrylate-butyl methacrylate) copolymer of B-3, its ethyl acrylate: butyl methacrylate=100:0; For the preparation of the poly(ethyl acrylate-butyl methacrylate) of B-1 and B-5 Ethyl acrylate-butyl methacrylate) copolymer, its ethyl acrylate: butyl methacrylate=60: 40, is used to prepare the poly(ethyl acrylate-butyl methacrylate) copolymer of B-2, Its ethyl acrylate: butyl methacrylate=40: 60, is used to prepare the poly(ethyl acrylate-butyl methacrylate) copolymer of B-4, its ethyl acrylate: butyl methacrylate=70: 30. According to the proportions of various poly(meth)acrylates and chlorobutyl rubber in B-1 to B-5 in t...

Embodiment 2

[0035] Ethyl acrylate, butyl methacrylate and glycidyl methacrylate were polymerized according to the ratios in Table 3 at a temperature of 25±2°C by conventional low-temperature emulsion polymerization. After the reaction finished, poly(ethyl acrylate-butyl methacrylate-glyceryl methacrylate) with active vulcanization point was obtained through washing, demulsification and drying according to the CB-1~CB-5 in Table 3 respectively. Formula, blend with chlorobutyl rubber on a double-roller mixer at a temperature of 170-180°C, and then add 201 phenolic resin vulcanizing agent, filler and other vulcanization aids at 60°C. The blend was molded on a press at a temperature of 140-170°C and a pressure of 5-10 MPa for 10-20 minutes to obtain a sample of a co-vulcanized blended chlorinated butyl rubber / polymethacrylate composite damping material. Performance details are shown in Table 4.

[0036] Numbering

[0037] Numbering

[0038] Numbering

[0039]...

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Abstract

The composite butyl rubber / poly (methyl) acrylate damping material and its preparation process features that butyl rubber in 60-90 weight portions, and poly (methyl) acrylate or its copolymer with or without active sulfurizing points in 10-40 weight portions are first mixed homogeneously in a double-roller mixing machine or extruder at 160-180 deg.c for 5-10 min; the mixture is then mixed with sulfurizing agent in 1-30 weight portions, sulfurizing assistant in 1-5 weight portions and stuffing in 10-50 weight portions at 50-60 deg.c; and the mixture is finally mold pressed in a press at 140-170 deg.c and 5-10 MPa to obtain the composite butyl rubber / poly (methyl) acrylate damping material.

Description

1. Technical field [0001] The invention relates to a butyl rubber / poly(meth)acrylate composite damping material and a preparation method thereof, belonging to the field of polymer synthesis and molding processing. 2. Background technology [0002] Butyl rubber is a traditional damping material because every other carbon atom in the isobutylene molecular chain has two symmetrically substituted methyl groups, the number of substituents is large, the chain segment relaxation resistance is large, and the internal friction peak is high. However, the maximum damping value of butyl rubber appears at -30 to -40°C. At 0°C, the damping value is low. Above 10°C, the damping function is almost lost, which greatly reduces the effective performance of butyl rubber near room temperature. Damping function. In order to broaden the effective damping functional area of ​​butyl rubber near room temperature, many experts and scholars at home and abroad have improved the performance of butyl rub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L9/00
Inventor 黄光速吴锦荣陈喜荣何显儒
Owner SICHUAN UNIV
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