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The preparation method of non-alkali glass fiber SMC yarn film-forming agent

An alkali-free glass fiber and film-forming agent technology, used in fiber processing, textiles and papermaking, etc., can solve the problems of inapplicability, affecting the quality of glass fiber yarn or felt, poor matching of antistatic agents, etc. knotty effect

Inactive Publication Date: 2017-01-18
北京东方亚科力化工科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyvinyl acetate (PVAc) emulsion, as the film-forming agent of the sizing agent, can endow the glass fiber yarn with excellent hardness. The matching of electrostatic agent is very bad, which seriously affects the stability of sizing agent and directly affects the quality of glass fiber yarn or felt. All common PVAc emulsions are not suitable for glass fiber sizing agent

Method used

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Examples

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Effect test

preparation example Construction

[0018] The invention provides a method for preparing an alkali-free glass fiber SMC yarn film-forming agent, the method comprising the following steps: preparing a mixed monomer, the mixed monomer comprising functional monomers, vinyl acetate monomers and acrylic acid monomers; preparing In the step of crosslinking agent solution, relative to the total amount of monomers, the content of crosslinking agent is 1 to 4% by mass; in the step of seed emulsion polymerization, 10% by mass of the mixed monomer solution is mixed with 10% by mass of The crosslinking agent solution, under the oxidation-reduction initiation system, carries out the seed emulsion reaction in a separate titration mode; the emulsion polymerization reaction step is to mix 90% by mass of the mixed monomer solution with 90% by mass of the crosslinked Agent solution, under the oxidation-reduction system, the emulsion polymerization reaction is carried out in a separate titration mode.

[0019] In the present inven...

Embodiment 1

[0027] At room temperature, in a four-necked reaction flask equipped with a stirrer, a reflux condenser, a thermometer and a dropping funnel, 209.5g (11.64mol) of deionized water, 1.2g (0.0088mol) of sodium acetate trihydrate, 7.2 g (0.016mol) polyoxyethylene ether sorbitan monostearate, 120g of polyvinyl alcohol; 0.8g (0.0054mol) vinyltrimethoxysilane, 6g (0.083mol) acrylic acid monomer and 393.2g (4.57mol) vinyl acetate monomer was put into a drop-in bottle, stirred for half an hour and mixed evenly to obtain a mixed monomer. At the same time, 12g (0.12mol) of methylol acrylamide and 42.6g (2.37mol) of deionized water were put into another dropping bottle, and stirred for half an hour to dissolve. In a water bath at 58-60°C, heat and stir, so that the reaction bottle is stirred and heated to 58-60°C, add 10% by mass of mixed monomer and 10% by mass of methylol acrylamide solution, 0.6g (0.0047mol) Tert-butyl hydroperoxide, 0.72g (0.0047mol) sodium bisulfite, carry out seed ...

Embodiment 2

[0030]At room temperature, in a four-necked reaction flask equipped with a stirrer, a reflux condenser, a thermometer and a dropping funnel, 209.5g (11.64mol) of deionized water, 1.2g (0.0088mol) of sodium acetate trihydrate, 7.2 g (0.016mol) polyoxyethylene ether sorbitan monostearate, 120g of polyvinyl alcohol; 0.8g (0.0032mol) r-methacryloxypropyltrimethoxysilane, 6g (0.083 mol) of acrylic acid monomer and 393.2g (4.57mol) of vinyl acetate monomer were put into the dropping bottle, stirred for half an hour and mixed evenly to obtain the mixed monomer. At the same time, 12 g (0.12 mol) of nitrogen methylol acrylamide and 42.6 g (2.37 mol) of deionized water were put into another dropping bottle, and stirred for half an hour to dissolve. In a water bath at 58-60°C, heat and stir, so that the reaction bottle is heated to 58-60°C with stirring, and add 10% by mass of mixed monomer and 10% by mass of nitrogen methylol acrylamide solution, 0.6g (0.0047mol ) tert-butyl hydroperox...

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Abstract

The invention provides a preparation method for an alkali-free glass fiber SMC (Sheet Molding Compound) yarn film-forming agent. The method comprises the following steps: preparing a mixed monomer, wherein the mixed monomer comprises a functional monomer, a vinyl acetate monomer and an acrylic acid monomer; preparing a cross-linking agent solution, wherein in comparison with the total amount of the monomers, the content of the cross-linking agent is 1-4% in mass percentage; carrying out seeded emulsion polymerization, wherein under an oxidation-reduction initiating system, separately titrating 10% of the mixed monomer solution and 10% of the cross-linking agent solution in mass percentage is carried out to perform a seed emulsion reaction; carrying out emulsion polymerization, wherein under the oxidation-reduction initiating system, separately titrating 90% of the mixed monomer solution and 90% of the cross-linking agent solution in mass percentage is carried out to perform an emulsion reaction.

Description

technical field [0001] The invention relates to a method for preparing a special film-forming agent for alkali-free glass fiber SMC yarn and the film-forming agent prepared by the method. Background technique [0002] The key to the development of new glass fiber varieties lies in the sizing agent technology. The role of the sizing agent is mainly reflected in two aspects. One is the protective effect, which increases the lubricity and wear resistance of the original silk, improves the tensile strength, and reduces the flying hair and broken filaments. It meets the requirements of wire drawing and post-process clustering, stranding, chopping, and weaving; on the other hand, it imparts compatibility between glass fibers and matrix materials, and improves the overall performance of glass fiber composite materials. The film former is the key component in the sizing, and it is also the basis for determining the performance and classification of the sizing. It is used in the lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F218/08C08F220/06C08F230/08C08F220/58C08F2/30D06M15/333
Inventor 王国军胡丽梅
Owner 北京东方亚科力化工科技有限公司
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