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Preparation process of easy processing cold resisting type polyacrylate rubber

A polyacrylate and acrylate technology, which is applied in the field of preparation of easy-to-process and cold-resistant polyacrylate rubber, can solve the problems of difficulty in ensuring performance stability, time-consuming and labor-intensive processing, and prolonged feeding time, so as to shorten the feeding time. , The effect of improving processing performance and reducing the degree of sticking to the roller

Inactive Publication Date: 2008-02-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of polyacrylate rubber, the glass transition temperature (Tg) of the polymer can be lowered by the above two methods, improving low temperature performance, but the result is usually that the polymer becomes soft and sticky, making processing difficult
Often the rubber sticks to the roller immediately after processing, and the feeding time is prolonged, which makes the processing time-consuming and laborious, and it is difficult to guarantee the stability of performance

Method used

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  • Preparation process of easy processing cold resisting type polyacrylate rubber
  • Preparation process of easy processing cold resisting type polyacrylate rubber
  • Preparation process of easy processing cold resisting type polyacrylate rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: According to the polymerization formulation listed in Table 1., implement emulsion polymerization. Add deionized water into the reaction kettle, add PH regulator, add emulsifier, stir to dissolve, mix acrylate monomer, low temperature oil resistant monomer, vulcanization point monomer, and crosslinking monomer in proportion, and add the total monomer first Mixed monomers with 20% mass, at 40°C, nitrogen (N 2 ) under the protection of emulsification, and then add an initiator to initiate a polymerization reaction at 50°C. During the reaction, the reaction temperature is maintained at 50°C, and the remaining 80% of the mixed monomer is added dropwise, and a post-elimination agent is added in the later stage of the reaction to obtain polyacrylate polymer emulsion.

[0036] Add the prepared polymer emulsion to a 10% sodium chloride (NaCl) solution at 80°C to break the emulsion, stir while adding, and after the original gum is fully coagulated, the obtained T...

Embodiment 2

[0045] Embodiment 2: According to the polymerization formulation listed in Table 4., implement emulsion polymerization. Add deionized water into the reaction kettle, add PH regulator, add emulsifier, stir to dissolve, mix acrylate monomer, low temperature oil resistant monomer, vulcanization point monomer, and crosslinking monomer in proportion, and add the total monomer first Mixed monomers with 50% mass, at 45°C, nitrogen (N 2 ) under the protection of emulsification, and then add an initiator to initiate a polymerization reaction at 50°C. During the reaction, the reaction temperature is maintained at 50°C, and the remaining 50% of the mixed monomer is added dropwise, and the post-elimination agent is added in the later stage of the reaction to obtain polyacrylate polymer emulsion.

[0046] Add the prepared polymer emulsion to a 3% sodium chloride (NaCl) solution at 80°C to break the emulsion, stir while adding, and after the original gum is fully coagulated, the obtained ...

Embodiment 3

[0056] Embodiment 3: According to the polymerization formulation listed in Table 7., implement emulsion polymerization. Add deionized water into the reaction kettle, add PH regulator, add emulsifier, stir to dissolve, mix acrylate monomer, low temperature oil resistant monomer, vulcanization point monomer, and crosslinking monomer in proportion, and add the total monomer first Mixed monomers with 25% mass, at 50°C, nitrogen (N 2 ) under the protection of emulsification, and then add an initiator to initiate a polymerization reaction at 50 ° C. During the reaction, the reaction temperature is maintained at 50 ° C, and the remaining 75% of the mixed monomer is added dropwise, and the post-elimination agent is added in the later stage of the reaction to obtain polyacrylate polymer emulsion.

[0057] Add the prepared polymer emulsion to a 5% sodium chloride (NaCl) solution at 70°C to break the emulsion, stir while adding, and after the original gum is fully coagulated, the obtain...

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Abstract

This invention relates to a method of preparing a low temperature resistance polyacrylic ester rubber. It takes acrylic ester monomer, subzero oil-proof monomer, sulfurized monomer, cross-link monomer as comonomer, by the way of emulsion polymerization, to synethesis polyacrylic ester rubber tropocollagen, then through milling, curing, to come to the product. It can promote property of low temperature resistance by molecular designing of polymeric compound, and promote property of processing by introducing cross-link monomer to shape microcrystalline precrosslinking structure. The low temperature brittleness can reach -35deg.C, and it has good processing property, shorting time 50%, reducing tackiness.

Description

technical field [0001] The invention is a preparation method of easy-processing cold-resistant polyacrylate rubber, which uses acrylate monomers, low-temperature oil-resistant monomers, vulcanization point monomers, and cross-linking monomers as comonomers to prepare a polyacrylate rubber through emulsion polymerization. A polyacrylate rubber with a pre-crosslinked structure. Improve the low-temperature resistance of polyacrylate rubber through molecular design of polymers; improve the processing performance of polyacrylate rubber by introducing cross-linking monomers in the polymerization process to form a small amount of pre-cross-linked structure; Synthesis and processing technology of acrylate rubber. Background technique [0002] Polyacrylate rubber is a special rubber with excellent oil resistance and heat resistance. Due to its high cost performance, polyacrylate rubber is widely used in the field of oil seals. The main chain of the polyacrylate rubber macromolecule...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/08C08F20/10C08F2/44C08J3/24C08K5/10C08K3/04C08K5/09C08L83/04
Inventor 李效玉郑久松
Owner BEIJING UNIV OF CHEM TECH