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Water swelling rubber, metallic composite sealing material and preparation methods thereof

A composite technology of water-absorbing rubber and metal, which is applied in the direction of metal layered products, engine seals, chemical instruments and methods, etc., can solve problems such as difficulty in guaranteeing bonding strength, inability to withstand high pressure and high temperature, etc. Strength problems, high pressure, reducing the effect of rubber elasticity

Inactive Publication Date: 2011-02-09
CHONGQING CITY WANTONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, one of the objects of the present invention is to provide a kind of water-swellable rubber, which is used to solve the technical problem of compatibility between rubber and water-absorbent resin, to ensure the water-absorption expansion rate of the water-swellable rubber, and at the same time, the application of the rubber is also It can solve the technical problem that the bonding strength between rubber and metal materials is difficult to guarantee, and can reach a bonding strength of more than 3Mpa; the second object of the present invention provides a preparation method for the water-swellable rubber; the third object of the present invention is Provide a metal composite sealing material, which combines the aforementioned water-swellable rubber with metal materials, not only has the functional characteristics of water-swellable rubber, but also solves the problem that existing rubber sealing products cannot withstand high pressure and high temperature Technical problem, it has the characteristics of outstanding sealing effect and wide application range; the fourth purpose of the present invention is to provide the preparation method of the metal composite sealing material

Method used

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  • Water swelling rubber, metallic composite sealing material and preparation methods thereof
  • Water swelling rubber, metallic composite sealing material and preparation methods thereof
  • Water swelling rubber, metallic composite sealing material and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The water-swellable rubber of this embodiment is prepared by blending two kinds of superabsorbent resins SAP1# and SAP2# with rubber by physical blending method, wherein SAP1# uses acrylic acid, acrylamide and sodium propylene sulfonate as monomers, and adopts It is a ternary copolymerized superabsorbent resin prepared by aqueous solution polymerization, and SAP2# is a binary copolymerized superabsorbent resin made of carboxymethylated cellulose grafted with acrylamide.

Embodiment 2

[0043] The difference from Example 1 is that the particle size of the superabsorbent resin used is less than 80 μm.

Embodiment 3

[0045] The difference from Example 2 is that this example uses SAP1# and SAP2# on the basis of using the third superabsorbent resin SAP3# mixed with rubber. SAP3# is made of starch, acrylic acid, Super absorbent resin obtained by grafting acrylamide and maleic anhydride.

[0046] The water-absorbing swellable rubber prepared by mixing SAP1#, SAP2#, SAP3# alone with rubber and the water-absorbed swellable rubber obtained in Examples 2 and 3 were proposed respectively, and the volume expansion ratios of primary water absorption and secondary water absorption were tested, and the experimental results obtained The situation is shown in the table below:

[0047] Table 1 Experimental data table of compounding agent

[0048]

[0049] experiment analysis:

[0050] From the data in the above table, it can be seen that when using multiple resins together, the volume expansion rate of primary water absorption and the volume expansion rate of secondary water absorption are better, es...

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Abstract

The invention discloses a water swelling rubber and a metallic composite sealing material. Through improvement on formula, a mixing process and a plasticizing process, the problem of compatibility between the water swelling rubber and water swelling resin is successfully solved, the water swelling rate of the water swelling rubber is guaranteed, the water swelling rubber can be firmly adhered to a metal base material, the problem of adhesion strength of the water swelling rubber and a metal is solved, and adhesion strength is over 3MPa. The metallic composite sealing material in the invention is prepared by combining the water swelling rubber and the metal base material and therefore has the characteristics of unique elasticity of the rubber and the swellable volume of the water swelling rubber in case of water and the characteristics of high strength, rebound resilience and high bearing capacity of the metal. The metallic composite sealing material has a good sealing effect and a long service life. Besides, the invention also discloses methods for preparing the water swelling rubber and the metallic composite sealing material.

Description

technical field [0001] The invention relates to the field of functional polymer material manufacturing, in particular to a water-absorbing swellable rubber and a metal composite sealing material prepared by using the water-absorbing swellable rubber, and also relates to a preparation method of the water-absorbing swellable rubber and the metal composite sealing material. Background technique [0002] The prior art has shown that introducing a group with a water-repellent function into the molecule of the rubber substrate or adding a hydrophilic component to the rubber substrate can endow the rubber with a water-swelling function, and the water-swellable rubber comes out in In the 1970s, it was first studied in Japan and developed rapidly. [0003] At present, the sealing materials used in the field of rubber sealing industry in my country are mainly special rubber composed of water-absorbing swellable rubber or rubber and rubber. Although the composite products of rubber and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/12C08L21/00C08L33/26C08L101/00B32B15/06B32B38/16B29B7/30B32B37/12C08L51/02C08L33/02
Inventor 粟坤
Owner CHONGQING CITY WANTONG IND
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