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Carboxylated styrene-butadiene latex

A carboxylated styrene-butadiene latex and emulsifier technology, which is applied in the field of chemical manufacturing, can solve problems such as uneven molecular weight and large particle size distribution range, and achieve the effects of uniform temperature distribution, guaranteed stirring time, and concentrated particle size distribution

Active Publication Date: 2015-05-20
宁波卫山多宝建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is the problem of large particle size distribution range and inhomogeneous molecular weight in the prior art, thereby providing a kind of carboxylated styrene-butadiene latex with good mechanical properties with small particle size distribution range and more uniform molecular weight

Method used

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  • Carboxylated styrene-butadiene latex

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The present embodiment provides a kind of carboxylated styrene-butadiene latex:

[0028] Preparation raw materials: in parts by mass, including: 100 parts of polymerized monomer, 0.5 part of emulsifier, 50 parts of deionized water, 0.3 part of molecular weight regulator and 0.3 part of initiator;

[0029] The composition of the polymerized monomer is: 20wt% of C4 aliphatic conjugated diene, 15wt% of C8 aromatic vinyl compound, 4.5wt% of C3-C5 ethylenically unsaturated carboxylic acid, and C3-C4 unsaturated amide 0.5wt%; the emulsifier includes anionic emulsifier and nonionic emulsifier, the anionic emulsifier is an alkyl sulfate; the nonionic emulsifier is an alkylphenol polyoxyethylene ether; the molecular weight regulator is sulfur Alcohol, described initiator is potassium persulfate aqueous solution;

[0030] Produce 20t carboxylated styrene-butadiene latex through the following steps:

[0031] S1: Add a total of 90% deionized water, 25% emulsifier, molecular weigh...

Embodiment 2

[0038] The present embodiment provides a kind of preparation method of carboxylated styrene-butadiene latex:

[0039] Preparation raw materials: in parts by mass, including: 100 parts of polymerized monomer, 0.6 part of emulsifier, 55 parts of deionized water, 0.4 part of molecular weight regulator and 0.5 part of initiator;

[0040] The composition of the polymerized monomer is: 19wt% of C4 aliphatic conjugated diene, 75wt% of C8 aromatic vinyl compound, 3wt% of C3-C5 ethylenically unsaturated carboxylic acid, 1wt% of C3-C4 unsaturated amide %, C4-C7 acrylate 2wt%; the emulsifier is a mixed emulsifier of anionic emulsifier and nonionic emulsifier, and the anionic emulsifier is an alkyl sulfate; the nonionic emulsifier is an alkylphenol Base polyoxyethylene ether; The molecular weight regulator is a mercaptan, and the initiator is an aqueous solution of ammonium persulfate;

[0041] Produce the carboxylated styrene-butadiene latex that obtains 20t through the following steps:...

Embodiment 3

[0049] The present embodiment provides a kind of preparation method of carboxylated styrene-butadiene latex:

[0050] Preparation raw materials: in parts by mass, including: 100 parts of polymerized monomer, 0.8 part of emulsifier, 60 parts of deionized water, 0.4 part of molecular weight regulator and 0.7 part of initiator;

[0051] The composition of the polymerized monomer is: 16wt% of C4 aliphatic conjugated diene, 65wt% of C8 aromatic vinyl compound, 1wt% of C3-C5 ethylenically unsaturated carboxylic acid, 3wt% of C3-C4 unsaturated amide %, C4~C7 acrylate 15wt%; said emulsifier includes anionic emulsifier and nonionic emulsifier, said anionic emulsifier is a mixture of alkyl sulfate and alkylbenzene sulfonate; said nonionic emulsifier The agent is a mixture of alkylphenol-based polyoxyethylene ether and polyvinyl alcohol; the molecular weight regulator is mercaptan, and the initiator is a mixed aqueous solution of potassium persulfate and ammonium persulfate;

[0052] Pr...

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Abstract

The invention relates to a carboxylated styrene-butadiene latex. High-speed steam is utilized to provide reaction heat energy for the reaction of the carboxylated styrene-butadiene latex, and the cooled steam is converted into high-temperature deionized water; the high-speed steam also drives the liquid in the reaction vessel to rotate, and the liquid in the reaction vessel is dispersed by the steam flow to form abundant micro steam-water combinations so as to push the material in the reaction vessel to quickly flow; and the substances and temperature in the reaction vessel are uniformly distributed, the polymerization reaction is uniform, and thus, the carboxylated styrene-butadiene latex has the advantages of stable molecular structure, controllable molecular weight and more centralized size distribution, has balanced and excellent mechanical properties, and enhances the qualification rate and quality of the product.

Description

technical field [0001] The invention relates to a carboxylated styrene-butadiene latex, which belongs to the field of chemical manufacturing. Background technique [0002] Carboxylated styrene-butadiene latex is a copolymer produced by emulsion polymerization of butadiene, styrene, a small amount of carboxylic acid and other additives. It is a milky white water dispersion with blue-purple luster. Carboxylated styrene-butadiene latex has the advantages of high cohesive force and conjunctival strength, good mechanical and chemical stability, good fluidity and storage stability, and large filling capacity. Widely used in papermaking, carpet, textile, jewelry environmental protection (charcoal carving and plastic flowers), building decoration industry (modified cement mortar, wood glue, modified asphalt, oil field drilling) and other industries. [0003] For example, Chinese patent document CN101125902A discloses a preparation method of carboxylated styrene-butadiene latex for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F2/38C08F2/24
Inventor 张弘强周红伟张宏伟翁书豪张乐荣
Owner 宁波卫山多宝建材有限公司
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