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Linear high-molecular-weight modified polyester emulsion, preparation method thereof and application of linear high-molecular-weight modified polyester emulsion in glass fiber impregnating compound

A modified polyester, high molecular weight technology, applied in linear high molecular weight modified polyester emulsion and its preparation, application field of glass fiber sizing agent, can solve the problem of low molecular weight of polyester emulsion, poor emulsion stability, glass fiber Problems such as poor wettability, to achieve the effect of good solubility, high stiffness and enhanced strength

Active Publication Date: 2021-04-09
宜兴市伟业玻纤材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004]In order to solve the technical problems of low molecular weight polyester emulsion, poor wettability to glass fiber, yellowish color and poor emulsion stability in the prior art, it provides high linearity Molecular weight modified polyester emulsion and its preparation method and application in glass fiber sizing agent

Method used

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  • Linear high-molecular-weight modified polyester emulsion, preparation method thereof and application of linear high-molecular-weight modified polyester emulsion in glass fiber impregnating compound
  • Linear high-molecular-weight modified polyester emulsion, preparation method thereof and application of linear high-molecular-weight modified polyester emulsion in glass fiber impregnating compound
  • Linear high-molecular-weight modified polyester emulsion, preparation method thereof and application of linear high-molecular-weight modified polyester emulsion in glass fiber impregnating compound

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Embodiment 1

[0031] The preparation method of linear high molecular weight modified polyester emulsion comprises the steps:

[0032](1) Preparation of unsaturated polyester resin: put adipic acid, fumaric acid, ethoxylated bisphenol A, and propoxylated bisphenol A into the oil heater with a molar ratio of 3:1:2:2.15. Stirring, in the reaction kettle of the vertical condenser and the horizontal condenser, add 0.1% methyl hydroquinone and 0.08% organotin compound of the total mass of the material, close the feeding port, open the cooling water of the vertical condenser, open the oil Heater, after 1.3 hours, raise the temperature to 115°C until all the materials are completely melted, turn on the stirring motor, and pass nitrogen; continue to heat up to 145°C after 1.5 hours, turn off the cooling water of the vertical condenser, and turn on the cooling of the horizontal condenser Water, start to drain, slowly heat up to 200°C for 5.5 hours, start to keep warm, the highest temperature during t...

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Abstract

The invention relates to a linear high-molecular-weight modified polyester emulsion, a preparation method thereof and application of thelinear high-molecular-weight modified polyester emulsion in a glass fiber impregnating compound. The preparation method comprises the steps of carrying out esterification reaction on binary acid and dihydric alcohol under the action of a catalyst and a polymerization inhibitor to obtain unsaturated polyester resin; and after the esterification reaction is finished, adding polyether into the unsaturated polyester resin to carry out modified grafting reaction to obtain modified polyester resin which is directly used for the next step of reaction, and after the modified grafting reaction is finished, adding a solvent and water to emulsify and dilute to obtain the linear high-molecular-weight modified polyester emulsion. The linear high-molecular-weight modified polyester emulsion disclosed by the invention is used as a glass fiber film-forming agent, is applied to felt yarns, transparent plate yarns and jet yarns, also can be applied to direct yarns, SMC yarns and the like, and can provide a good protection effect, good bonding and film-forming bundling effects, relatively high soaking speed and excellent flexibility for glass fibers.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a linear high molecular weight modified polyester emulsion, a preparation method thereof and an application in a glass fiber sizing agent. Background technique [0002] Glass fiber is a product formed by melting various powders at high temperature in a kiln, drawing through a platinum bushing, coating a layer of sizing on the surface during the drawing process, and drying. Sizing agent raw materials and formulation technology are the most critical technology to reflect the inherent quality of various glass fiber products (including yarn, cloth, felt), and are also indispensable industrial consumables in glass fiber production. The technical core of glass fiber sizing is divided into two parts: one is the synthesis technology of the most important film-forming agent component in the raw material components of the sizing; the other is the application technology o...

Claims

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Application Information

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IPC IPC(8): C08G81/00C03C25/323
CPCC08G81/00C03C25/323
Inventor 张伟权张驰张骁彭群
Owner 宜兴市伟业玻纤材料有限公司
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