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Preparing method of styrene-acrylate latex and styrene-acrylate latex

A technology of styrene-acrylic latex and emulsion, which is applied in the field of artificial latex chemical manufacturing, can solve the problems of large particle size distribution range and uneven molecular weight, and achieve the effect of ensuring stirring time, ensuring uniformity, and uniform material and temperature distribution

Inactive Publication Date: 2016-04-06
ZHEJIANG TIANCHEN PLASTIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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 method of the stable performance of styrene-acrylic latex with small particle size distribution range and molecular weight and Styrene Acrylic Latex

Method used

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  • Preparing method of styrene-acrylate latex and styrene-acrylate latex
  • Preparing method of styrene-acrylate latex and styrene-acrylate latex
  • Preparing method of styrene-acrylate latex and styrene-acrylate latex

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Embodiment 1

[0031] The present embodiment provides a kind of preparation method of styrene-acrylic latex:

[0032] The following raw materials are used: in parts by mass, including: in terms of 100 parts of polymerized monomers, 1 part of emulsifier, 70 parts of deionized water, 0.3 parts of molecular weight regulator, 0.6 parts of initiator, and 1.2 parts of seed emulsion;

[0033] The polymerized monomers are 30 parts of acrylate, 62 parts of styrene, and 8 parts of acrylic acid;

[0034] Include the following steps:

[0035] S1: Mix 35% deionized water, 15% initiator, 20% emulsifier and 50% polymerized monomer to obtain a prefabricated emulsion;

[0036] S2: Add the seed emulsion, the remaining initiator, the remaining emulsifier, the remaining mixed monomers and the remaining deionized water into the reaction vessel under vacuum conditions, and feed N into the reaction vessel during the adding process 2 , N 2 The feeding amount is 40kg / h, the flow rate is 10m / s, and the rotating sp...

Embodiment 2

[0041] The present embodiment provides a kind of preparation method of styrene-acrylic latex:

[0042] The following raw materials are used: in parts by mass, including: in terms of 100 parts of polymerized monomers, 1 part of emulsifier, 75 parts of deionized water, 0.4 parts of molecular weight regulator, 0.8 parts of initiator, and 1.4 parts of seed emulsion;

[0043] The polymerized monomers are 35 parts of acrylate, 59 parts of styrene, and 6 parts of acrylic acid;

[0044] Include the following steps:

[0045] S1: Mix 40% deionized water, 20% initiator, 25% emulsifier and 55% polymerized monomer to obtain a prefabricated emulsion;

[0046] S2: Add the seed emulsion, the remaining initiator, the remaining emulsifier, the remaining mixed monomers and the remaining deionized water into the reaction vessel under vacuum conditions, and feed N into the reaction vessel during the adding process2 , N 2 The feeding amount is 45kg / h, the flow rate is 15m / s, and the rotating spee...

Embodiment 3

[0051] The present embodiment provides a kind of preparation method of styrene-acrylic latex:

[0052] The following raw materials are used: in parts by mass, including: in terms of 100 parts of polymerized monomers, 1.5 parts of emulsifier, 80 parts of deionized water, 0.5 parts of molecular weight regulator, 1 part of initiator, and 1.6 parts of seed emulsion;

[0053] The polymerized monomers are 42 parts of acrylate, 53 parts of styrene, and 5 parts of acrylic acid;

[0054] Include the following steps:

[0055] S1: Mix 42% deionized water, 24% initiator, 28% emulsifier and 60% polymerized monomer to obtain a prefabricated emulsion;

[0056] S2: Add the seed emulsion, the remaining initiator, the remaining emulsifier, the remaining mixed monomers and the remaining deionized water into the reaction vessel under vacuum conditions, and feed N into the reaction vessel during the adding process 2 , N 2 The feeding amount is 48kg / h, the flow rate is 18m / s, and the rotating sp...

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Abstract

The invention relates to a preparing method of styrene-acrylate latex. Reaction heat energy is provided for a reaction of styrene-acrylate latex through high-speed steam which is transformed into high-temperature deionized water after being cooled; in addition, the high-speed steam drives liquid in a reaction vessel to rotate, the liquid in the reaction vessel is dispersed by the steam flow to form a large number of tiny steam and water combined bodies, and materials in the reaction vessel are pushed to flow rapidly; furthermore, mechanical stirring is conducted for cooperation, the materials and the temperature in the reaction vessel are uniformly distributed, and a polymerization reaction is also very uniform, so that the end product styrene-acrylate latex is stable in molecular structure, molecular weight is easy to control, particle size distribution is more concentrated, the conversion rate of monomers can reach 99% or above, the content of unreacted polymerization monomers in latex is very small, and prepared styrene-acrylate latex is more environmentally friendly.

Description

Technical field [0001] The invention relates to a preparation method of styrene-acrylic latex and styrene-acrylic latex, and belongs to the field of chemical manufacturing of artificial latex. Background technique [0002] Existing lawn glue is usually prepared from carboxyl styrene-butadiene latex, which is obtained by emulsion copolymerization of polymerized monomers such as styrene and butadiene with a small amount of carboxylic acid and other additives. [0003] However, butadiene, which is the main polymerized monomer of carboxyl styrene-butadiene latex, reacts as a gas and reacts with other monomers as a gas-liquid reaction. This makes the reaction impossible and hinders the further improvement of the conversion rate, making the latex Contains a certain amount of unreacted styrene and butadiene, especially styrene, which has a certain degree of toxicity. The current "toxic runway" incident was caused by the use of some carboxylated styrene-butadiene latex with a low co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/10C08F220/06C08F2/38C08F2/24C08F2/01
CPCC08F2/01C08F2/24C08F2/38C08F212/08C08F220/10C08F220/06
Inventor 马楠张宏伟翁丽华黄塑塑
Owner ZHEJIANG TIANCHEN PLASTIC IND
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