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A kind of self-crosslinking polyvinyl acetate film-forming agent and its preparation method and application

A technology of polyvinyl acetate and film-forming agent, applied in the field of self-crosslinking polyvinyl acetate film-forming agent and its preparation, to achieve excellent high-temperature performance, high stiffness, and good solvent resistance

Active Publication Date: 2020-08-25
JUSHI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the problems described above

Method used

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  • A kind of self-crosslinking polyvinyl acetate film-forming agent and its preparation method and application
  • A kind of self-crosslinking polyvinyl acetate film-forming agent and its preparation method and application
  • A kind of self-crosslinking polyvinyl acetate film-forming agent and its preparation method and application

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Embodiment 1

[0062] Weigh each component by mass percentage, wherein, the modified polyvinyl alcohol is made by acetal reaction of two kinds of polyvinyl alcohol and formaldehyde whose grades are BP-20 and BF-17, each component is carried out according to the following steps Preparation of self-crosslinking polyvinyl acetate film-forming agent:

[0063] Preparation of 1S modified polyvinyl alcohol: weigh two kinds of polyvinyl alcohol and aldehyde according to the quality of modified polyvinyl alcohol required for the preparation of film-forming agent, and prepare appropriate amount of deionized water, hydrochloric acid, urea and sodium bicarbonate, specifically Add deionized water and polyvinyl alcohol into a reaction vessel containing a stirrer, a feeder, a reflux condenser and a thermometer, stir and raise the temperature to 90°C to dissolve completely, then cool down to 80°C and add hydrochloric acid to adjust the pH value to 1-2 , start to add formaldehyde dropwise and control the dro...

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Abstract

The invention provides a self-crosslinking polyvinyl acetate film-forming agent, wherein the raw materials comprise vinyl acetate, deionized water, modified polyvinyl alcohol, an emulsifier, a reactive emulsifier, a cross-linking monomer, an initiator and a pH value adjuster, and the cross-linking monomer is an amide compound. According to the present invention, through the mutual cooperation of the components, the prepared film-forming agent has characteristics of strong precursor bundling property, excellent high-temperature performance, high stiffness, good self-crosslinking property, goodsolvent resistance and the like. The invention further provides a preparation method and uses of the self-crosslinking polyvinyl acetate film-forming agent.

Description

technical field [0001] The invention relates to the field of film-forming agents, in particular to a self-crosslinking polyvinyl acetate film-forming agent and its preparation method and application. Background technique [0002] The film-forming agent is the main component of the sizing used in the high-speed drawing of glass fibers. It can bond hundreds of glass fibers together, form a protective film on the surface of the fibers, and endow the glass fibers with good wettability and stiffness. It can protect the glass fiber from damage in the subsequent processing procedures, so as to meet the requirements of various molding process performances of glass fiber products. Therefore, the performance of the film-forming agent directly affects the use effect of the sizing agent. [0003] At present, the molding process of reinforced composite materials has high requirements on the performance of glass fibers coated with sizing agent. Take the 3-12mm chopped strands used in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F218/08C08F220/58C08F2/30C08L31/04C08K7/14
CPCC08F2/30C08F218/08C08K7/14C08L31/04C08F220/58
Inventor 李翠红嵇杰汪如发李春锋
Owner JUSHI GRP CO
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