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Preparation method of carboxylic butadiene-styrene 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 ensuring stirring time, improving pass rate and quality, and excellent mechanical properties

Active Publication Date: 2015-05-06
NANTONG TENGLONG CHEM TECH CO LTD
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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 preparation of good carboxylated styrene-butadiene latex with small particle size distribution range and more uniform molecular weight of mechanical properties method

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  • Preparation method of carboxylic butadiene-styrene latex

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Embodiment 1

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

[0028] 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] The carboxylated styrene-butadiene latex of 20t is produced through the following steps:

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

Embodiment 2

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

[0039] 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] The carboxylated styrene-butadiene latex of 20t is produced through the following steps:

[0042] S1: Add...

Embodiment 3

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

[0050] 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] The carboxylat...

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Abstract

The invention relates to a preparation method of a carboxylic butadiene-styrene latex; reaction thermal energy is provided for reaction of the carboxylic butadiene-styrene latex through high-speed water vapour; after being cooled, the water vapour is converted into high-temperature deionized water; furthermore, the high-speed water vapour is also used for driving liquid in a reaction container to rotate; the liquid in the reaction container is dispersed by a water vapour flow to form a lot of tiny steam and water mixtures; a material in the reaction container is driven to flow rapidly; substances and temperature in the reaction container are uniform to distribute; the polymerization reaction is also uniform; therefore, the final product, namely the carboxylic butadiene-styrene latex, is steady in molecular structure, easy in molecular weight control and more centralized in particle diameter distribution; the balanced and good mechanical property can be obtained; and the yield and quality of the product are increased.

Description

technical field [0001] The invention relates to a preparation method of 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 styren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F2/24
Inventor 张弘强周红伟张宏伟翁书豪张乐荣
Owner NANTONG TENGLONG CHEM TECH CO LTD
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