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Preparation method of ABS plastic

A plastic and latex technology, applied in the field of plastic preparation, can solve the problems of slightly poor product appearance, inability to feed materials immediately, energy consumption, and high material consumption, and achieve the effects of improving product quality, reducing energy consumption, and increasing output

Inactive Publication Date: 2018-06-01
QUANZHOU DELI CHEM
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  • Abstract
  • Description
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Problems solved by technology

It takes up to 3 hours for feeding, cooling, and unloading each kettle, accounting for 25-30% of the total operating time, which is a great waste. Secondly, due to various reasons, it is often impossible to feed immediately after unloading, which causes Two problems: one is a waste of time, and the other is that due to waiting for feeding, the latex remaining on the wall of the kettle after unloading will lose water and form a film, forming a solid film on the wall, which can cause material loss and affect heat transfer. , the current production process of the emulsion graft blending method is as follows:
In addition, there is a danger of explosion in this process transformation process, large investment in equipment, high energy consumption and material consumption, and poor product appearance.

Method used

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  • Preparation method of ABS plastic

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Embodiment Construction

[0037] Below in conjunction with specific embodiment, the present invention is described in further detail:

[0038] A kind of preparation method of ABS plastic provided by the present invention comprises the following steps:

[0039] l. Synthesize the small particle polybutadiene latex that reaches the required conversion rate by continuous method;

[0040] m. According to the proportion, continuously add the additional

[0041] Polymerizing agent, start to add stabilizer after 1.5 minutes, obtain the polybutadiene latex flow of large particle diameter;

[0042] n. Continuously add some styrene, acrylonitrile, mercaptan to the polybutadiene latex flow in proportion

[0043] After a certain period of time, stop adding styrene and acrylonitrile, and the latex stream containing the monomers is continuously flowed into the graft head kettle, and after staying in this kettle for 40 minutes, it flows into the second kettle;

[0044] o. Continuously drop the remaining emulsifier,...

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Abstract

The invention relates to the field of plastic preparation, in particular to a preparation method of an ABS plastic with rapid synthesis of PB latex, continuous polymerization of large particle size PBlatex, simplified process flows and reduced sewage generation. The preparation method comprises the following steps: a, continuously synthesizing small-particle PB latex; b, continuously expanding the particle size of the PB latex; c, carrying out continuous graft polymerization; d, carrying out continuously condensation and continuous dehydration; e, carrying out continuous noumenal synthesis ofSAN; f, carrying out continuous granulation; and g, carrying out continuous extrusion and granulation to synthesize the ABS plastic.

Description

technical field [0001] The invention relates to the field of plastic preparation, in particular to a preparation method of ABS plastic. Background technique [0002] There are two types of mainstream technologies for ABS manufacturing in the world today, one is the continuous bulk method, and the other is the emulsion grafting blending method. [0003] The essence of the continuous bulk method is a special solution grafting method. It is characterized by low solvent (about 25~30%) dosage, low conversion rate of about 60%, and during the grafting process, SAN is continuously generated due to styrene and acrylonitrile. Monomer styrene, one of the solvents for dissolving rubber, is decreasing. When the amount of styrene is reduced to a certain extent, the rubber will precipitate out and enter the SAN, that is, a phase change occurs. After the phase change, free SAN and grafted SAN are further generated, and the rubber is cross-linked to make it elastic. In order to facilita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F279/04C08F212/08C08F220/44
Inventor 李祎山黄立本陈志宏
Owner QUANZHOU DELI CHEM
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