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Polymerization terminator for rubber synthesis

A polymerization terminator and rubber technology, applied in the terminator field, can solve the problems of harmful odor, large hydrogen sulfide, equipment corrosion, etc., and achieve the effect of improving product performance, low viscosity and good termination performance

Active Publication Date: 2020-03-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional SDD (forma sodium) / NaNO 2 Compared with compound terminators, the content of nitrosamines in rubber and the storage stability of latex are greatly improved, but the amount of hydrogen sulfide generated is relatively large, which brings harmful odor and corrosion to equipment

Method used

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  • Polymerization terminator for rubber synthesis
  • Polymerization terminator for rubber synthesis
  • Polymerization terminator for rubber synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]Taking the production of styrene-butadiene rubber by emulsion polymerization as an example, a 2.0L polymerization kettle is used in the polymerization water bath, and the polymerization kettle is replaced by vacuum and nitrogen. Add soft water, soap liquid, electrolyte solution, emulsifier, regulator, styrene and butadiene into the polymerization kettle, when the temperature of the polymerization kettle drops to 4.5℃~5.5℃, add hydrogen peroxide p-menthane to carry out polymerization In the experiment, when the conversion rate reached 60% to 70%, N-isopropyl hydroxylamine and ionic liquid were added to the polymerization kettle at the same time. N-isopropyl hydroxylamine accounted for 2.0% of the weight of the synthetic styrene-butadiene rubber, and the ionic liquid accounted for 0.1% by weight of styrene rubber, the ionic liquid includes n-butyl xanthate-tetramethyl quaternary ammonium salt.

[0035] Above-mentioned polymerization component and parts by weight are:

[0...

Embodiment 2

[0038] The difference from Example 1 is that N-isopropylhydroxylamine accounts for 0.1% of the weight of the synthetic styrene-butadiene rubber, and the ionic liquid accounts for 0.06% of the weight of the synthetic styrene-butadiene rubber.

Embodiment 3

[0040] The difference from Example 1 is that N-isopropylhydroxylamine accounts for 0.06% of the weight of the synthetic styrene-butadiene rubber, and the ionic liquid accounts for 0.04% of the weight of the synthetic styrene-butadiene rubber.

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PUM

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Abstract

The application of the invention provides a polymerization terminator for rubber synthesis. The synthesized rubber is butadiene styrene rubber. The polymerization terminator comprises N-isopropylhydroxylamine oxalate and ionic liquid, wherein the ionic liquid comprises alkyl xanthic acid-alkyl quaternary ammonium salts. The polymerization terminator comprises the alkyl xanthic acid-alkyl quaternary ammonium salts, so that free radicals can be effectively destroyed, polymer growth chains can be quickly terminated, new molecules without reaction activity are formed, the dosage is low, and the polymerization terminator has favorable terminating properties; and the terminator has vulcanization promoting effects, so that the prepared emulsion polymerization butadiene styrene rubber does not include nitrosamine, and when the polymerization terminator is used for preparing the butadiene styrene rubber, polymerization rubber of which the Mooney viscosity is qualified can be steadily prepared.The polymerization terminator has efficient terminating capacity and easily dissolves in water, so that the polymerization terminator has the characteristics of being easy to dissolve in latex, low inviscosity, low in dosage, pollution-free, capable of improving product properties and the like.

Description

technical field [0001] The present application relates to the field of terminators, in particular to a polymerization terminator for rubber synthesis. Background technique [0002] During emulsion polymerization, chain growth is usually terminated at a specified conversion to prevent the formation of polymer gels and to ensure the quality of the resulting polymer. The so-called termination is generally accomplished by using a terminator, which can chemically react with one or more components in the initiator system to destroy the initiator, so that the polymerization process can be stopped, and it can also be avoided in the future. Polymer properties change during handling and application. [0003] In the prior art, most of the terminators used in the production of styrene-butadiene rubber by emulsion polymerization. The polymerization terminators originally used in the synthesis of styrene-butadiene rubber mostly include dimethyl dithiocarbamate, dialkylhydroxylamine and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F2/42
CPCC08F236/10C08F2/42
Inventor 孙继德殷兰庞建勋王秀芝侯军刘乐然刘洪伟郭睿达
Owner PETROCHINA CO LTD