High-performance rubber damping material and preparation method thereof

A damping material and high-performance technology, applied in the field of damping materials, can solve the problems of large creep, high heat generation, short working life, etc., and achieve the effect of high tensile strength and low heat generation

Active Publication Date: 2020-08-18
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing damping materials in my country can basically meet the damping requirements, they have low tensile strength, high creep resistance, high heat generation, short working life, and large Creep, loss of damping and sealing effect, significantly affects the damping effect

Method used

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  • High-performance rubber damping material and preparation method thereof
  • High-performance rubber damping material and preparation method thereof

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preparation example Construction

[0032] Embodiments of the present invention provide a method for preparing a high-performance rubber damping material, comprising: grafting hydroxyethyl methacrylate and lignin onto the rubber molecular chain of natural latex by graft copolymerization to obtain high-performance Rubber damping material.

[0033] It should be noted that this method uses natural latex as the base material, and grafts hydroxyethyl methacrylate and lignin onto the rubber molecular chains of natural latex through graft copolymerization to form a semi-interpenetrating network structure. Among them, hydroxyethyl methacrylate is mainly used for the modification of resins and coatings. It has a higher damping temperature range, which can endow the prepared rubber damping material with the advantages of wide temperature range and high damping. At the same time, lignin is a biopolymer with a three-dimensional network structure formed by three kinds of phenylpropane units connected to each other through et...

Embodiment 1

[0048] This embodiment provides a high-performance rubber damping material, which is prepared by the following method:

[0049] S1: Weigh 100 parts of concentrated natural rubber latex by dry rubber, add 4 parts of polyoxyethylene fatty alcohol ether (prepared as a 15% aqueous solution before adding), stir well; and, add 10 parts of dry rubber under slow stirring Hydroxyethyl methacrylate and 5 parts of lignin (prepared into a 50% aqueous dispersion in advance), drop 0.1 part of initiator and 0.08 part of crosslinking agent;

[0050] S2: Stand still at 25° C. for 20 hours under nitrogen protection condition. After standing still, add 0.08 part of activator, and add 280 parts of distilled water, so that the total solid content is about 20%. Branched modified natural rubber latex;

[0051] S3: The modified natural rubber latex is subjected to conventional rubber processing techniques such as coagulation, tableting, washing, and drying to obtain hydroxyethyl methacrylate-lignin...

Embodiment 2

[0054] This embodiment provides a high-performance rubber damping material, which is prepared by the following method:

[0055] S1: Weigh 100 parts of concentrated natural rubber latex calculated as dry rubber, add 4 parts of polyoxyethylene fatty alcohol ether (prepared as a 15% aqueous solution before adding), and stir evenly. Then, under slow stirring, add 5 parts of hydroxyethyl methacrylate and 10 parts of lignin (prepared into an aqueous dispersion with a concentration of 50% in advance), and add dropwise 0.1 part of initiator and 0.08 part of crosslinking agent;

[0056] S2: Stand still at 25° C. for 20 hours under nitrogen protection condition. After standing still, add 0.08 part of activator, and add 280 parts of distilled water, so that the total solid content is about 20%. Branched modified natural rubber latex;

[0057] S3: The modified natural rubber latex is subjected to conventional rubber processing techniques such as coagulation, tableting, washing, and dryi...

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Abstract

The invention discloses a high-performance rubber damping material and a preparation method thereof, and relates to the technical field of damping materials. The preparation method of the high-performance rubber damping material comprises the step of: grafting hydroxyethyl methacrylate and lignin to a rubber molecular chain of natural latex through graft copolymerization reaction to obtain the high-performance rubber damping material. According to the method, natural latex is used as a base material; grafting hydroxyethyl methacrylate and lignin to a rubber molecular chain of the natural latexthrough graft copolymerization reaction, so that a semi-interpenetrating network structure is formed; by means of a relatively high damping temperature range of hydroxyethyl methylacrylate and the effect of improving the damping value of the lignin, the high-performance damping material taking the natural rubber as the main body has the characteristics of wide temperature range, high damping, high tensile strength, aging resistance, low heat generation and the like.

Description

technical field [0001] The invention relates to the technical field of damping materials, in particular to a high-performance rubber damping material and a preparation method thereof. Background technique [0002] Viscoelastic rubber damping material is a kind of vibration damping material that emerged in the 1960s. It mainly converts vibration energy into heat energy through the friction of molecular chains to achieve the purpose of damping. It has the advantages of light weight and outstanding damping effect at resonance points. However, the temperature range of viscoelastic rubber damping factor tanδ>0.3 is generally lower than room temperature, and it can only have a certain damping effect on vibrations with moderate or higher frequencies in a very narrow temperature range (△T<30°C). [0003] Among all kinds of rubber, butyl, nitrile and silicone rubber have high molecular chain polarity and large number of side groups, and the friction between molecular chains is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F253/00C08F289/00C08L51/04C08L51/00C08K13/02C08K3/06C08K3/22C08K5/098C08K5/47
CPCC08F253/00C08F289/00C08K13/02C08K3/06C08K3/22C08K5/098C08K5/47C08K2003/2296C08F220/20C08L51/04C08L51/00C08K5/18C08K5/40C08F279/02
Inventor 刘宏超王启方余和平彭政
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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