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High-performance waterproof rubber sealing material with hydrophilic expansion and preparation method thereof

A water-swelling and rubber-sealing technology, applied in the field of polymer materials, can solve the problems of low production cost, low strength, difficult dispersion of water-absorbing resin, etc., and achieve extremely high structure, good compatibility, excellent physical properties and processing performance. Effect

Inactive Publication Date: 2016-08-31
ANHUI RONGDA VALVE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN 103589001 A reports a high-performance water-absorbing swellable rubber, which is used in combination with rubber and water-absorbing resin. Although the production cost of the invented product is low, and the expansion rate changes after repeated water absorption, the strength is low, and the water-absorbing resin is difficult to be used on rubber. Distributed in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A high-performance water-swellable waterproof rubber sealing material, consisting of the following components by weight: 70 kg of nitrile rubber, 30 kg of chlorinated polyethylene rubber, 12 kg of bentonite-calcium carbonate microspheres, and 8 kg of SAP resin , spray carbon black 10 kg, stearic acid 2 kg, N-phenyl-N ， - 5 kg of cyclohexyl-p-phenylenediamine, 2 kg of accelerator D.

[0025] Specific steps are as follows:

[0026] (1) Preparation of bentonite-calcium carbonate microspheres:

[0027] ①, prepare calcium chloride solution, sodium carbonate solution, sodium lauryl sulfate aqueous solution and polyacrylamide aqueous solution, wherein calcium chloride and calcium carbonate solution are the same concentration, and its molar concentration is between 0.2mol / L, twelve The molar concentration of the alkyl sodium sulfate aqueous solution is between 15mmol / L, and the mass percentage concentration of the polyacrylamide aqueous solution is between 2%;

[0028] ②. Ad...

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Abstract

The invention discloses a high-performance waterproof rubber sealing material with hydrophilic expansion and a preparation method thereof. The high-performance waterproof rubber sealing material comprises the following components by weight part: 60-70 parts of nitrile rubber, 30-40 parts of chlorinated polyethylene rubber, 10-16 parts of bentonite-calcium carbonate microballoon, 6-10 parts of SAP resin, 8-12 parts of atomizing carbon black, 1-3 parts of stearic acid, 4-6 parts of N-phenyl-N cyclohexyl p-phenylenediamine and 1-3 parts of an accelerant. In the high-performance waterproof rubber sealing material with hydrophilic expansion provided by the invention, water-absorbent resin has good compatibility with rubber, so the high-performance waterproof rubber sealing material is high in stability; after being repeatedly used, the high-performance waterproof rubber sealing material still has excellent hydrophilic expansion property; the high-performance waterproof rubber sealing material has excellent physical performance and processing property.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-performance water-swellable waterproof rubber sealing material and a preparation method thereof. Background technique [0002] Water-swellable rubber (WSR) is a functional water-stop material. Because it has the characteristics of adapting to structural deformation and water expansion, it can play the role of elastic sealing and water sealing, so it is an ideal waterproof sealing for foundation engineering deformation joints, construction joints, water embankment caulking and various pipe joints. water material. [0003] Some domestic researchers believe that there are two forms of water absorption process of water-swelling rubber: one is to absorb water through capillary adsorption and diffusion; the other is to make water molecules and hydrophilic groups tightly combined through hydrogen bonds to form bound water. In practical industrial applications, the water-swellab...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L23/28C08K13/04C08K7/18C08K3/34C08K3/26C08K3/04
CPCC08L9/02C08L2205/035C08L2205/08
Inventor 胡光荣
Owner ANHUI RONGDA VALVE