Polymerization terminator for rubber synthesis

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

Active Publication Date: 2022-08-05
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, in the polymerization water bath, a 2.0L polymerization kettle is used, and the polymerization kettle is subjected to vacuum and nitrogen replacement. Add soft water, soap solution, electrolyte solution, emulsifier, conditioner, styrene and butadiene into the polymerization kettle, when the temperature of the polymerization kettle drops to 4.5℃~5.5℃, add hydrogen peroxide to montane for polymerization In the experiment, when the conversion rate reached 60% to 70%, N-isopropylhydroxylamine and ionic liquid were added to the polymerization kettle at the same time. 0.1% by weight of styrene rubber, the ionic liquid includes n-butyl xanthate-tetramethyl quaternary ammonium salt.

[0035] The above-mentioned polymer components and parts by weight are:

[0036]

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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Abstract

The present application provides a polymerization terminator for rubber synthesis. The synthetic rubber is styrene-butadiene rubber, the polymerization terminator includes N-isopropyl hydroxylamine and ionic liquid, and the ionic liquid includes alkyl xanthogen acid-alkyl quaternary ammonium salt. Since the polymerization terminator includes alkyl xanthogen-alkyl quaternary ammonium salt, it can effectively destroy free radicals and cause the polymer growth chain to be quickly terminated, and form new non-reactive molecules, so its amount and has good termination performance, and because the terminator has a vulcanization promoting effect, the prepared emulsion polymerized styrene-butadiene rubber does not contain nitrosamines. Polymeric rubber with acceptable viscosity. Because the polymerization terminator has high-efficiency termination ability and is easily soluble in water, it has the characteristics of easy solubility in latex, low viscosity, less dosage, no pollution and can improve product performance.

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 polymer gel formation and 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, which can not only stop the polymerization process, but also avoid 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 are mostly used in the synthesis of styrene-butadiene rubber. These substances are prone to generate secondary amines in the acidic environment of the latex coagulation process and during ...

Claims

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Application Information

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Patent Type & Authority Patents(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
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