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Carbon-filled modified acrylate rubber as well as composition and preparation method thereof

An acrylate and carbon modification technology, which is applied in the field of acrylate rubber, can solve the problems of acrylate rubber strength reduction, poor low temperature resistance and mechanical properties, and unsatisfactory effects.

Active Publication Date: 2022-06-07
山东海益橡胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Acrylic rubber is usually composed of hard monomer, soft monomer and vulcanized monomer. The soft monomer directly affects the low temperature. When the amount of soft monomer is added, acrylic Ester rubber has a low glass transition temperature and good low temperature resistance, but at the same time, when more soft monomers are added, the strength of acrylate rubber will decrease
[0003] Patent CN100369972C discloses a preparation method of easy-processing cold-resistant polyacrylate rubber, which uses acrylate monomer, low-temperature oil-resistant monomer, vulcanization point monomer, The cross-linking monomer is a comonomer. Polyacrylate raw rubber is synthesized by emulsion polymerization. After mixing and vulcanization, a cold-resistant polyacrylate rubber with a pre-crosslinking structure is prepared. The glass transition temperature It can reach -42.3°C, and the brittle temperature can reach -38°C. However, the strength at this time is only 8.95MPa, which cannot meet the performance requirements of acrylic rubber in the current market, especially the performance requirements of turbocharger tubes for acrylic rubber.
[0004] Patent CN107915807A discloses a micro-crosslinked low temperature resistant acrylate rubber raw rubber and its preparation method, the purpose of which is to overcome the low temperature resistance and mechanical properties of the current acrylate rubber Poor disadvantages, but the effect is not ideal. The lowest glass transition temperature of the acrylate rubber prepared by this method is only -25.6°C, and its corresponding tensile strength is only 1.91MPa, which has not been effectively improved.

Method used

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  • Carbon-filled modified acrylate rubber as well as composition and preparation method thereof
  • Carbon-filled modified acrylate rubber as well as composition and preparation method thereof
  • Carbon-filled modified acrylate rubber as well as composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of modified carbon black dispersion:

[0041] Assemble a 500ml reaction flask in an ice-water bath, mix 5g of N330 and 3g of sodium nitrate with 220ml of concentrated sulfuric acid, and add 30g of potassium perchlorate under stirring. After stirring for 30 min at 10°C, the ice bath was removed, the reaction flask was transferred to a magnetic stirrer, and the magnetic stirring was continued for 48 h. After that, 300 ml of deionized water was slowly added in 8 times, the temperature was raised to about 98 °C, and after stirring for 40 min, an appropriate amount of hydrogen peroxide was added to reduce the residual oxidant. Suction filtration while hot, and successively washed with 5% HCl solution and deionized water until the pH of the separation solution is 5-6. The obtained dispersion was ultrasonically dispersed for 1 h, and then freeze-dried to obtain hydrophilic modified N330. A 1 mg / ml hydrophilic modified N330 dispersion was prepared with 1% sodi...

Embodiment 2

[0049] (1) Preparation of modified carbon black dispersion:

[0050]Assemble a 500ml reaction flask in an ice-water bath, mix 5g of N330 and 4g of sodium nitrate with 200ml of concentrated sulfuric acid, and add 25g of potassium perchlorate under stirring. ℃, after stirring for 30 min, the ice bath was removed, the reaction flask was transferred to a magnetic stirrer, and the magnetic stirring was continued for 36 h. After that, 300ml of deionized water was slowly added in 8 times, the temperature was raised to about 95°C, and after stirring for 50min, an appropriate amount of hydrogen peroxide was added to reduce the residual oxidant. Suction filtration while hot, and successively washed with 5% HCl solution and deionized water until the pH of the separation solution is 5-6. The obtained dispersion was ultrasonically dispersed for 1 h, and then freeze-dried to obtain hydrophilic modified N330. A 2 mg / ml hydrophilic modified N330 dispersion was prepared with 1% sodium dodecy...

Embodiment 3

[0059] (1) Preparation of modified carbon black dispersion:

[0060] Assemble a 500ml reaction flask in an ice-water bath, mix 5g of N330 and 3.5g of sodium nitrate with 210ml of concentrated sulfuric acid, and add 28g of potassium perchlorate under stirring. Above 10 °C, after stirring for 30 min, the ice bath was removed, and the reaction flask was transferred to a magnetic stirrer, and the magnetic stirring continued for 48 h. After that, 300 ml of deionized water was slowly added in 8 times, the temperature was raised to about 98 °C, and after stirring for 40 min, an appropriate amount of hydrogen peroxide was added to reduce the residual oxidant. Suction filtration while hot, and successively washed with 5% HCl solution and deionized water until the pH of the separation solution is 5-6. The obtained dispersion was ultrasonically dispersed for 1 h, and then freeze-dried to obtain hydrophilic modified N330. A 1.5 mg / ml hydrophilic modified N330 dispersion was prepared wit...

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Abstract

The invention belongs to the technical field of acrylate rubber, and particularly relates to carbon-filled modified acrylate rubber as well as a composition and a preparation method thereof. The preparation method of the carbon-filled modified acrylate rubber comprises the following steps: carrying out hydrophilic modification on carbon black, and dispersing in a lauryl sodium sulfate solution to obtain a hydrophilic modified carbon black dispersion liquid; the preparation method comprises the following steps: adding lauryl sodium sulfate, OP-10, sodium hydrosulfite, ethyl acrylate, n-butyl acrylate, methoxyethyl acrylate, hydroxypropyl acrylate, a molecular weight regulator, chlorinated vinyl acetate and acrylic acid into deionized water, carrying out a polymerization reaction, after the reaction is completed, adding the hydrophilic modified carbon black dispersion liquid, carrying out a reaction, and then carrying out demulsification, washing and drying to obtain the hydrophilic modified carbon black. The carbon-filled modified acrylate rubber is obtained. According to the carbon-filled modified acrylate rubber composition, the glass transition temperature is lower than-43 DEG C, the strength is higher than 10 MPa, and the requirements for ultralow temperature and high strength are met at the same time.

Description

technical field [0001] The invention belongs to the technical field of acrylate rubber, in particular to a carbon-filled modified acrylate rubber, a composition and a preparation method thereof. Background technique [0002] Acrylate rubber is usually composed of hard monomer, soft monomer and vulcanized monomer. Among them, soft monomer directly affects low temperature. When the amount of soft monomer is added, the glass transition temperature of acrylate rubber is low, and the low temperature resistance performance is good, but at the same time. When too much soft monomer is added, the strength of acrylate rubber will decrease. [0003] Patent CN100369972C discloses a preparation method of easy-to-process cold-resistant polyacrylate rubber, which uses acrylate monomer, low-temperature oil-resistant monomer, vulcanization point monomer, and cross-linking monomer as comonomers, and through the method of emulsion polymerization, Synthetic polyacrylate rubber raw rubber, mixe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/08C08K9/02C08K3/04
CPCC08K9/02C08K3/04C08L33/066Y02T10/86
Inventor 马维新马娜
Owner 山东海益橡胶科技有限公司
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