Water-absorption expanding rubber combination containing montmorillonite absorbent material and preparation method thereof

A technology for water-absorbing swellable rubber and water-absorbing material, applied in the field of high-performance water-absorbing swellable rubber and its preparation, can solve the problems of low water absorption rate and water absorption speed, and achieve the effects of high water absorption rate, low mass loss rate and simple processing technology

Inactive Publication Date: 2008-04-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent US5663230 uses 25-35wt% sodium bentonite as the water-absorbing component to prepare butyl rubber WSR material, but the water-absorbing rate and water-absorbing speed of the material are very low, and the water-absorbing rate is 5-8% when soaked in water for 24 hours

Method used

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  • Water-absorption expanding rubber combination containing montmorillonite absorbent material and preparation method thereof
  • Water-absorption expanding rubber combination containing montmorillonite absorbent material and preparation method thereof

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preparation example Construction

[0034] Preparation of montmorillonite intercalated composite water-absorbing material A (prepared with reference to the method in CN 03114486.1):

[0035] Add 6.5 mol of acrylic acid and 4.55 mol of sodium hydroxide NaOH to a flask with a stirring device in a cold water bath, then add 4.0 mol of acrylamide and stir thoroughly, then add 0.00525 mol of ethylene glycol diacrylate and 226 g of montmorillonite Finally, add 0.1575 mol of potassium persulfate, gradually raise the temperature to 80°C to initiate polymerization, dry and pulverize to obtain a montmorillonite-sodium acrylate-acrylamide water-absorbing material with a water absorption rate of 17500%.

[0036] Preparation of montmorillonite intercalation composite water-absorbing material B:

[0037] Add 6.0mol of acrylic acid and 3.9mol of NaOH to a flask with a stirring device in a cold water bath, then add 3.5mol of methacrylamide, then add 0.00475mol of ethylene glycol diacrylate and 253 grams of montmorillonite, and f...

Embodiment 1

[0043] Put 100 parts of SBR / NBR (100 / 0) on the open rubber mixing machine and then add 5 parts of zinc oxide ZnO, 2 parts of SA, 1.5 parts of vulcanization accelerator TMTD, and 1 part of anti-aging agent 4010. , then add 10 parts of compatibilizer styrene / maleic anhydride copolymer, 120 parts of montmorillonite water-absorbing material A, filler (WCB: nano CaCO 3 2 / 8) 40 parts, knead evenly (non-stick roller), finally add 1 part of S, after kneading, make a thin pass, make a triangular bag 6 times, and put the rubber on a flat vulcanizing machine under 8MPa pressure, 140 Vulcanize at ℃ for 10 minutes to obtain a water-swellable rubber composition, referred to as WSR material (hereinafter the same), and its properties are listed in Table 1.

Embodiment 2

[0045] Take 100 parts of base glue SBR / NBR (75 / 25), 65 parts of montmorillonite water-absorbing material A, 10 parts of water absorption accelerator PEG-800, 5 parts of compatibilizer styrene / maleic anhydride copolymer, 5 parts of zinc oxide ZnO, 2 parts of SA, 1.5 parts of vulcanization accelerator TMTD, 1 part of anti-aging agent 4010, filler (WCB: nano CaCO 3 It is 7 / 3) 40 parts, 1 part S, thin pass after kneading evenly, pack into a triangle bag 6 times, take off the sheet, and vulcanize on a flat vulcanizing machine at 9MPa pressure, 140°C for 20min to prepare WSR material, the performance is listed Table 1.

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Abstract

The present invention relates to a water absorption swelling rubber combination with a montmorillonite water-absorbing material and the preparation thereof, wherein the montmorillonite water-absorbing material is formed by intercalation-copolymerization with acrylic acid and acrylamide in the sheet layer of montmorillonite under the action of the initiator, and the water absorption swelling rubber is made of rubber group, montmorillonite water-absorbing material, activator, anti-aging agent, reinforcing filler, compatibilizer, water-absorbing accelerant, etc. by milling of the blender mill and then vulcanizing. The water absorption swelling rubber is easy to prepare, has an excellent water-absorption and a high rate, and can be used to prepare the waterproof and water-stop materials, building materials, etc.

Description

technical field [0001] The invention relates to a high-performance water-swellable rubber (WSR) and a preparation method thereof, in particular to a water-swellable rubber composition containing montmorillonite water-absorbing materials and a preparation method thereof. Background technique [0002] With the development of science and technology, the requirements for the application performance of polymer materials are increasing day by day, but if the required application performance is only met by synthesizing new polymers, it is often due to the source of raw materials, synthesis technology, process conditions, production costs, etc. limited by many factors. Therefore, while people are constantly researching and developing new polymers, they focus more on the preparation of heterophasic copolymers with new functions by studying the blending of known polymer materials, which has achieved twice the result with half the effort. But the vast majority of polymers are incompat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00C08L33/02C08L33/26C08K3/34C08F2/44C08K5/40C08K3/00
Inventor 李锦山胡海华王云普方伟王振华宋中勤张群赵玉中苏玲俞双福梁滔荔栓红唐明安李树毅陈建刚
Owner PETROCHINA CO LTD
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