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Cationic neutralizer, high-solid-content styrene-butadiene latex and preparation method of high-solid-content styrene-butadiene latex

A technology of styrene-butadiene latex and cationic emulsifier, which is applied in the field of cationic neutralizer, high-solid styrene-butadiene latex and its preparation, which can solve the problems of difficult particle size control, unfavorable industrial scale production, and great influence of agglomeration , to achieve the effect of simple operation process, low cost, and avoiding latex agglomeration

Active Publication Date: 2022-07-01
山东京博中聚新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the chemical agglomeration method is that the formula of the agglomeration agent has a great influence on the agglomeration effect, the particle size control is difficult, and it is easy to cause aggregation and gel generation, which is not conducive to industrial scale production

Method used

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  • Cationic neutralizer, high-solid-content styrene-butadiene latex and preparation method of high-solid-content styrene-butadiene latex
  • Cationic neutralizer, high-solid-content styrene-butadiene latex and preparation method of high-solid-content styrene-butadiene latex
  • Cationic neutralizer, high-solid-content styrene-butadiene latex and preparation method of high-solid-content styrene-butadiene latex

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preparation example Construction

[0028] The embodiment of the present invention provides the preparation method of the cationic neutralizer as described above, comprising the following steps:

[0029] Mixing and dissolving the cationic emulsifier, pH adjuster, electrolyte and desalted water, optionally adding a nonionic emulsifier and a cationic diffusing agent, to obtain a soap solution with a pH value of 5-6.5;

[0030] Mix the soap solution, molecular weight regulator, butadiene, styrene and epoxidized monomer, then add an initiator to carry out a polymerization reaction to obtain a neutralizer emulsion with a solid content of 25-40%, and adjust the pH value 6 to 7.

[0031] In the embodiment of the present invention, a cationic latex-type neutralizer is prepared, and the particle size distribution is widened by the neutralization and bridging effect of the cationic emulsion on the anionic styrene-butadiene latex. In the process, the pH is adjusted and controlled to affect the size and distribution of the...

Embodiment 1

[0068] 1. Preparation of cationic neutralizer:

[0069] The polymerization was carried out in a 1L autoclave.

[0070] Process formula and operation:

[0071] Cationic emulsifier: 6g

[0072] Nonionic emulsifier: 2.4g

[0073] Cationic diffusing agent: 0.42g

[0074] Desalted water: 400g

[0075] pH adjuster: 0.3g

[0076] Electrolyte: 0.6g

[0077] Phosphoric acid: 0.02g

[0078] Molecular weight regulator: 0.08g

[0079] Butadiene: 140g

[0080] Styrene: 60g

[0081] Glycidyl methacrylate: 3g

[0082] Initiator: 0.4g

[0083] Dodecyl ammonium chloride: 6g, op-10: 2.4g, polycarboxylate ammonium salt: 0.42g, desalted water: 400g, sodium bicarbonate: 0.3g, potassium chloride: 0.6g, mix, room temperature 150rpm Stir, dissolve completely in 30 minutes, add phosphoric acid 0.02g in the reaction kettle, and adjust the pH of the soap solution to 5-6.

[0084] Feed nitrogen into the reactor to replace the air inside the reactor for 3 to 5 times, and add tert-dodecanethio...

Embodiment 2

[0091] Preparation of cationic neutralizer:

[0092] The polymerization was carried out in a 1L autoclave.

[0093] Process formula and operation:

[0094] Cationic emulsifier: 5g

[0095] Nonionic emulsifier: 2.6g

[0096] Cationic diffusing agent: 0.48g

[0097] Desalted water: 400g

[0098] pH adjuster: 0.35g

[0099] Electrolyte: 0.8g

[0100] Phosphoric acid: 0.015g

[0101] Molecular weight regulator: 0.08g

[0102] Butadiene: 160g

[0103] Styrene: 40g

[0104] Glycidyl methacrylate: 6g

[0105] Initiator: 0.45g

[0106] The octadecyl trimethyl ammonium chloride: 5g, alkylamine polyoxyethylene ether (1205): 2.6g, acid group modified polyacrylate (Hantai chemical water-based dispersant HT A30): 0.48 g, desalted water: 400g, sodium bicarbonate: 0.35g, sodium phosphate: 0.8g, stir at room temperature 150rpm, dissolve completely in 40 minutes, add 0.02g of phosphoric acid in the reaction kettle, and adjust the pH of the soap solution to 5-6.

[0107] Feed nitroge...

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Abstract

The invention provides a cationic neutralizer, high-solid-content styrene-butadiene latex and a preparation method of the high-solid-content styrene-butadiene latex, and the cationic neutralizer is mainly prepared from butadiene, styrene, an epoxidized monomer, a molecular weight regulator and a cationic emulsifier as raw materials through emulsion polymerization reaction; the cation neutralizer is an emulsion with the solid content of 25-40%, and the pH value is 6-7. The preparation method of the high-solid-content styrene-butadiene latex comprises the following steps: stirring and mixing the anionic styrene-butadiene latex and the neutralizer; the neutralizing agent is the cation neutralizing agent described in the specification; and adjusting the pH value of the mixed latex to 8-10, and then dehydrating to obtain the high-solid-content styrene-butadiene latex. By applying the cation neutralizer provided by the invention, high-content cation styrene-butadiene latex and high-content anion styrene-butadiene latex can be respectively obtained, the large-particle-size requirements of different types of latex are met, and meanwhile, latex coalescence is avoided.

Description

technical field [0001] The application relates to the technical field of styrene-butadiene latex, in particular to a cationic neutralizer, a high-solid styrene-butadiene latex and a preparation method thereof. Background technique [0002] Styrene-butadiene latex is mainly a kind of synthetic rubber latex formed by emulsion polymerization of water, emulsifier, monomer (butadiene / styrene), auxiliary agent and initiator under specific temperature and pressure. In terms of polymerization process, there are two processes for styrene-butadiene latex polymerization: thermal method and cold method. Due to the existence of water medium, the polymerization temperature is limited to a certain extent, and the temperature control range is 5-80 °C. The cold polymerization temperature is 5 to 15 °C. The latex synthesized by the cold polymerization process has a low degree of crosslinking and a regular molecular chain. The styrene-butadiene latex is usually used in tires, conveyor belts an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F212/08C08F220/32C08F2/28C08F2/30C08C1/07
CPCC08F236/10C08C1/07C08F212/08C08F220/325C08F2/28C08F2/30Y02T10/86
Inventor 刘清钊崔丽华栾波任学斌郑红兵
Owner 山东京博中聚新材料有限公司