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A kind of preparation method of styrene-acrylic latex and propylbenzene latex

A styrene-acrylic latex and emulsion technology, applied in the field of artificial latex chemical manufacturing, can solve problems such as uneven molecular weight and large particle size distribution, and achieve the effects of ensuring uniformity, ensuring stirring time, and focusing particle size distribution.

Inactive Publication Date: 2018-04-20
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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  • A kind of preparation method of styrene-acrylic latex and propylbenzene latex
  • A kind of preparation method of styrene-acrylic latex and propylbenzene latex
  • A kind of preparation method of styrene-acrylic latex and propylbenzene latex

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Embodiment 1

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

[0032] Use the following raw materials: in parts by mass, including: based on 100 parts of polymerized monomers, 1 part of emulsifier, 70 parts of deionized water, 0.3 part of molecular weight regulator, 0.6 part of initiator, 1.2 parts of seed emulsion;

[0033] The polymerized monomer is 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 pre-emulsion;

[0036] S2: Add the seed emulsion, the remaining initiator, the remaining emulsifier, the remaining mixed monomer and the remaining deionized water into the reaction vessel under vacuum conditions, and pass N into the reaction vessel during the addition process. 2 , N 2 The feeding rate is 40kg / h, the flow rate is 10m / s, and the rotating speed of the stirring blade ...

Embodiment 2

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

[0042] Use the following raw materials: in parts by mass, including: based on 100 parts of polymerized monomers, 1 part of emulsifier, 75 parts of deionized water, 0.4 part of molecular weight regulator, 0.8 part of initiator, 1.4 parts of seed emulsion;

[0043] The polymerized monomer is 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 pre-emulsion;

[0046] S2: Add the seed emulsion, the remaining initiator, the remaining emulsifier, the remaining mixed monomer and the remaining deionized water into the reaction vessel under vacuum conditions, and pass N into the reaction vessel during the addition process.2 , N 2 The feeding rate is 45kg / h, the flow velocity is 15m / s, and the rotating speed of the stirring padd...

Embodiment 3

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

[0052] Use the following raw materials: in parts by mass, including: based on 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, 1.6 parts of seed emulsion;

[0053] The polymerized monomer is 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 pre-emulsion;

[0056] S2: Add the seed emulsion, the remaining initiator, the remaining emulsifier, the remaining mixed monomer and the remaining deionized water into the reaction vessel under vacuum conditions, and pass N into the reaction vessel during the addition process. 2 , N 2 The feeding rate is 48kg / h, the flow velocity is 18m / s, and the rotating speed of the stirring ...

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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, belonging to the field of artificial latex chemical manufacturing. Background technique [0002] Existing lawn glue is usually prepared by carboxylated styrene-butadiene latex, which is obtained by emulsion copolymerization of polymerized monomers such as styrene and butadiene, plus a small amount of carboxylic acid and other additives. [0003] Butadiene as the main polymerization monomer of carboxylated styrene-butadiene latex is a gas when it reacts, and it is a gas-liquid reaction when it reacts with other monomers, which causes the reaction to be impossible to be very sufficient, hinders the further improvement of the conversion rate, and makes the latex Contains a certain amount of unreacted styrene and butadiene, especially styrene has certain toxicity. The current "poison runway" incident is caused by the use of some carboxylated styrene-butadiene ...

Claims

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Application Information

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Patent Type & Authority Patents(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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