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Preparation method of high-solid-content butadiene-styrene latex

A technology of styrene-butadiene latex and high solid content, which is applied in the field of preparation of high-solid content styrene-butadiene latex, can solve problems such as high viscosity and narrow particle size distribution, and achieve easy control of agglomerated particle size, high production efficiency, and satisfying The effects of production, processing and performance requirements

Active Publication Date: 2015-07-22
CHANGZHOU LINGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage is that the particle size distribution is narrowed while concentrating, so that the viscosity is relatively high

Method used

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  • Preparation method of high-solid-content butadiene-styrene latex
  • Preparation method of high-solid-content butadiene-styrene latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a. Raw materials: 75 parts of butadiene, 25 parts of styrene, 0.2 parts of n-dodecyl mercaptan, 0.8 parts of potassium oleate, 0.5 parts of sodium dodecyl diphenyl ether disulfonate, polyoctearyl alcohol 1.2 parts of oxyethylene ether (20), 0.15 parts of ammonium oxalate, 0.5 parts of sodium hexametaphosphate, 0.25 parts of ammonium persulfate, 0.1 parts of sodium sulfite, 103 parts of deionized water (conductivity ≤ 5 μS / cm);

[0032] b. Emulsion polymerization: Add 91 parts of deionized water, 0.6 parts of potassium oleate, 0.35 parts of sodium dodecyl diphenyl ether disulfonate, and 0.9 parts of stearyl polyoxyethylene ether (20) to the polymerization kettle in a vacuum state. 1 part, 0.4 part of sodium hexametaphosphate, stir and dissolve, add 13 parts of styrene, 0.1 part of n-dodecyl mercaptan, vacuumize to -0.05MPa, fill nitrogen to 0.3MPa, repeat 3 times, exhaust nitrogen to the kettle Medium to slightly positive pressure, add 38 parts of butadiene to the reacti...

Embodiment 2

[0041] a. Raw materials: 60 parts of butadiene, 40 parts of styrene, 0.2 parts of n-dodecyl mercaptan, 1.2 parts of disproportionated potassium abietate, 0.3 parts of sodium dodecylbenzenesulfonate, nonylphenol polyoxyethylene 1.2 parts of ether (15), 0.12 parts of ammonium oxalate, 0.5 parts of sodium hexametaphosphate, 0.25 parts of ammonium persulfate, 0.1 parts of sodium sulfite, 103 parts of deionized water (conductivity ≤ 5 μS / cm);

[0042] b. Emulsion polymerization: Add 91 parts of deionized water, 0.9 parts of disproportionated potassium abietate, 0.23 parts of sodium dodecylbenzenesulfonate, and 0.9 parts of nonylphenol polyoxyethylene ether (15) into the polymerization kettle under vacuum , 0.4 parts of sodium hexametaphosphate, after stirring and dissolving, add 20 parts of styrene and 0.1 part of n-dodecyl mercaptan, vacuumize to -0.05MPa, fill with nitrogen to 0.3MPa, repeat 3 times, and discharge nitrogen into the kettle Slightly positive pressure, add 30 parts ...

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Abstract

The invention relates to a preparation method of a high-solid-content butadiene-styrene latex for a latex product, and provides a preparation method of a high-solid-content butadiene-styrene latex. The method comprises the following procedures: by taking butadiene and styrene as main monomers, using composite emulsifier which at least contains one surfactant containing potassium or sodium carboxylate groups, and taking small-molecule organic ammonium polycarboxylate as agglomerant and alkali metal inorganic salt as water-phase density regulator, polymerizing, removing the residual monomers, agglomerating, centrifuging, and thickening to obtain 60-65% high-solid-content butadiene-styrene latex. The preparation method of a high-solid-content butadiene-styrene latex, provided by the invention, is simple, feasible, economic, friendly to environment and high in production efficiency; and the high-solid-content butadiene-styrene latex prepared by the method can meet the requirements for production processing and service performance of products such as latex mattresses, foamed carpets and the like.

Description

technical field [0001] The invention relates to a preparation method of high-solid-content styrene-butadiene latex for latex products. Background technique [0002] High solid content styrene-butadiene latex refers to styrene-butadiene latex with a solid content greater than 60%, which is mainly used in the preparation of latex sponge mattresses and carpet sponge backings. Foreign countries began research in this area at the end of the 1860s, and successively developed a variety of latexes with a solid content of 60% to 70%. At present, there are more than a dozen brands of commercialized high-solid content styrene-butadiene latex. The solid content of styrene-butadiene latex is generally about 50%, which is mainly used in the paper and carpet industries, while the styrene-butadiene latex with a solid content of more than 60% and suitable for the preparation of latex sponge has not been commercially produced so far. [0003] The preparation of styrene-butadiene latex with h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F236/10C08F2/24C08C1/07C08C1/10
Inventor 蒋国忠张立军邓希平孙文朱志范
Owner CHANGZHOU LINGDA CHEM
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