Styrene-acrylic emulsion as well as preparation method and application thereof

A styrene-acrylic emulsion and seed technology, applied in the field of emulsion polymerization, can solve the problems of lowering softening point, easy agglomeration, large polarity difference, etc., and achieves lowering glass transition temperature, preventing agglomeration and sticking, and improving melt strength. Effect

Active Publication Date: 2021-07-20
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, adjusting the relative molecular weight of the resin is beneficial to the low-temperature fixing of the toner. For example, a low-molecular-weight styrene-acrylic emulsion is compounded to prepare a low-molecular-weight toner resin. The resin will reduce the softening point and curing speed of the toner, not only easy to agglomerate during storage, but also cause the toner to stick to the roller and affect the printing quality; by adjusting the type and proportion of functional monomers used in the polymerization process, the The degree of cross-linking of low molecular weight styrene-acrylic resin has obtained the toner resin with low-temperature fixing performance, but the reaction process needs to strictly control the proportion of functional monomers, and the flocculant used in the post-treatment process also needs to be compatible with functional The monomer is used in combination, and the polymerization and process conditions are relatively harsh
In addition, although low-molecular-weight styrene-acrylic resin is beneficial to low-temperature fixing, it will reduce the softening point, resulting in the phenomenon of roller sticking during use; adjust the molecular weight, glass transition temperature and softening point of styrene-acrylic resin by adjusting the emulsion polymerization formula. , but for the styrene-acrylic emulsion system, it is difficult to meet the requirements of low glass transition temperature and high softening point of styrene-acrylic resin simply through the amount of hard monomer and soft monomer and the molecular weight of styrene-acrylic resin
At the same time, the main components of generally obtained toner resin are styrene and acrylate. Due to the existence of a large amount of styrene, the polarity of the resin is generally low, and the polarity difference with some additives and pigments is large, which is not conducive to resin and pigment fillers. Although the introduction of functional monomers can increase the polarity, the presence of too many functional groups such as hydroxyl, carboxyl, etc. will increase the water absorption of the resin

Method used

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  • Styrene-acrylic emulsion as well as preparation method and application thereof
  • Styrene-acrylic emulsion as well as preparation method and application thereof
  • Styrene-acrylic emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of styrene-acrylic emulsion, is made up of the raw material of following parts by weight:

[0030]

[0031]

[0032] The preparation method comprises the following steps:

[0033] (1) Put 0.8 parts of allyloxy nonylphenol propanol polyoxyethylene (10) ether ammonium sulfate in a beaker, add 40 parts of water to dissolve, and stir to obtain a reactive emulsifier aqueous solution; weigh 10 parts of styrene, Add 15 parts of butyl acrylate and 6 parts of polyethylene glycol diacrylate 800 into the beaker, and ultrasonically treat with the reactive emulsifier aqueous solution for 30 minutes to prepare the seed pre-emulsion;

[0034] (2) 1.2 parts of allyloxy nonylphenol propanol polyoxyethylene (10) ether ammonium sulfate is placed in a beaker, 40 parts of water are added to dissolve, and stirred to obtain a reactive emulsifier aqueous solution; 40 parts of styrene, Add 5 parts of α-methylstyrene, 5 parts of acrylonitrile, 10 parts of butyl acrylate, 4 parts of...

Embodiment 2

[0040] A kind of styrene-acrylic emulsion, is made up of the raw material of following parts by weight:

[0041]

[0042] The preparation method comprises the following steps:

[0043] (1) Put 1 part of allyloxy nonylphenol propanol polyoxyethylene (10) ether ammonium sulfate in a beaker, add 40 parts of water to dissolve, stir to obtain a reactive emulsifier aqueous solution; weigh 20 parts of styrene, Add 8 parts of butyl acrylate and 10 parts of polyethylene glycol diacrylate 200 into a beaker, and ultrasonically treat with reactive emulsifier aqueous solution for 30 minutes to prepare seed pre-emulsion;

[0044] (2) Put 2 parts of allyloxy nonylphenol propanol polyoxyethylene (10) ether ammonium sulfate in a beaker, add 90 parts of water to dissolve, stir to obtain a reactive emulsifier aqueous solution; weigh 45 parts of styrene, Add 20 parts of α-methylstyrene, 15 parts of acrylonitrile, 7 parts of butyl acrylate, 2 parts of methacrylic acid, 0.5 parts of divinylbenz...

Embodiment 3

[0050] A kind of styrene-acrylic emulsion, is made up of the raw material of following parts by weight:

[0051]

[0052]

[0053] The preparation method comprises the following steps:

[0054] (1) Place 2.4 parts of allyloxy nonylphenol propanol polyoxyethylene (10) ether ammonium sulfate in a beaker, add 100 parts of water to dissolve, and stir to obtain a reactive emulsifier aqueous solution; weigh 20 parts of styrene, Add 5 parts of butyl acrylate and 10 parts of polyethylene glycol diacrylate 1200 into a beaker, and ultrasonically treat with the reactive emulsifier aqueous solution for 30 minutes to prepare the seed pre-emulsion;

[0055] (2) 3.6 parts of allyloxy nonylphenol propanol polyoxyethylene (10) ether ammonium sulfate are placed in a beaker, 120 parts of water are added to dissolve, and stirred to obtain a reactive emulsifier aqueous solution; 30 parts of styrene, 10 parts acrylonitrile, 2.5 parts alpha-methylstyrene, 15 parts butyl acrylate, 3 parts acry...

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Abstract

The invention relates to the field of emulsion polymerization, in particular to a styrene-acrylic emulsion which is prepared from the following raw materials in parts by weight: 45 to 85 parts of styrene monomer; 5 to 15 parts of acrylonitrile; 10 to 25 parts of butyl acrylate; 2 to 10 parts of polyethylene glycol diacrylate; 0.5 to 6 parts of a functional monomer; 0.5 to 6 parts of a molecular chain regulator; 1 to 6 parts of a reactive emulsifier; 0.3 to 2 parts of an initiator; 0.5 to 5 parts of ammonia water; and 100 to 250 parts of water. The invention also provides styrene-acrylic resin with high softening point, high melt strength, high curing speed and excellent thermal stability. The invention also provides a preparation method and application of the styrene-acrylic emulsion, which are low in cost, environment-friendly and simple in process.

Description

technical field [0001] The invention relates to the field of emulsion polymerization, in particular to a styrene-acrylic emulsion, its preparation method and application. Background technique [0002] In recent years, the global toner market has shown steady growth, and the main component of toner is resin, which accounts for 70% to 90% of the weight of toner. Commonly used toner resins: styrene-acrylic resin, polyester resin, epoxy resin, etc. Styrene-acrylic resin has good weather resistance, good film-forming property, strong adhesion, good miscibility with other base materials, and strong pigment bearing capacity; therefore, it is often used as the main resin of toner. The domestic production method of styrene-acrylic resin is mainly solution polymerization, the cost of solvent recovery is high, the product smells strong, and it is easy to cause environmental pollution. Therefore, the preparation of resin for toner by emulsion polymerization has aroused people's close a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F283/06C08F212/08C08F212/12C08F220/44C08F220/18C08F220/20C08F222/14C08F220/06C08F212/36C08F220/40C08F2/38C09D11/106
CPCC08F290/062C08F283/065C08F2/38C09D11/106C08F212/08C08F212/12C08F220/44C08F220/1804C08F220/20C08F222/102C08F220/06C08F212/36C08F222/103C08F220/40
Inventor 李坤泉吴文剑张美丽巫运辉谢华理苏晓竞张晓凡
Owner DONGGUAN UNIV OF TECH
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