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Air-drying unsaturated polyester resin for easy-polishing gel coat, and preparation method thereof

A polyester resin and air-drying technology, which is applied in the field of air-drying unsaturated polyester resin for easy-grinding gel coats and its preparation, can solve problems such as adhesion, toughness and other performance adjustment difficulties, and achieve low porosity, Good adhesion, good air-drying effect

Active Publication Date: 2013-11-06
CHANGZHOU HUAKE POLYMERS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In order to overcome the disadvantages of the existing easy-grinding gel coats, such as adhesion and toughness, which are relatively difficult to adjust, the present invention provides an air-drying unsaturated polyester resin for easy-grinding gel coats and a preparation method thereof

Method used

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  • Air-drying unsaturated polyester resin for easy-polishing gel coat, and preparation method thereof

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preparation example Construction

[0027] Such as figure 1 It is a schematic diagram of the synthesis process of the present invention, a method for preparing an air-drying unsaturated polyester resin for an easy-to-polish gel coat, which comprises the following steps:

[0028] A. Transesterification reaction:

[0029] The organic polyols and renewable vegetable oils are transesterified under certain reaction conditions, and the catalyst is one of lithium hydroxide, calcium hydroxide, potassium hydroxide, sodium hydroxide, sodium carbonate, sodium bicarbonate or lead oxide or various;

[0030] B. Polycondensation reaction:

[0031] The alcoholyzate prepared in step A is reacted with small molecule diols or dibasic acids, tetrahydrophthalic anhydride, and allyl ether. The head temperature is 95~105°C, the reaction temperature is 170~180°C, and resin / styrene is used =2 / 1 Prepare the sample, control the target value with a bubble tube viscosity or a cone-plate viscometer, the reaction end point is P~Q, and the ...

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Abstract

The present invention relates to the technical field of polymer material preparation, and especially to an air-drying unsaturated polyester resin for an easy-polishing gel coat, and a preparation method thereof. The resin is prepared by the following steps, wherein the steps comprise that: an organic polyol and a renewable vegetable oil are subjected to an ester exchange reaction, and then are subjected to a condensation polymerization with a small molecule dihydric alcohol or a dibasic acid, tetrahydrophthalic anhydride and allyl ether; the formed polymer is dissolved in styrene to prepare the resin. The air-drying unsaturated polyester resin of the present invention has the following advantages that: (1) the renewable vegetable oil is selected as the main component, such that the use of the toxic and harmful chemical engineering raw materials is reduced so as to meet the green environmental protection concept; (2) the vegetable oil, the tetrahydrophthalic anhydride, the allyl ether and the like in the resin component provide good air-drying properties, such that the resin can be widely applicable for the fields with high air-drying requirements. The resin of the present invention is mainly applicable for the easy-polishing gel coat with the high air-drying requirements, and has characteristics of excellent toughness, excellent adhesion, excellent weather resistance, excellent polishing property and the like. In addition, the resin of the present invention has good air-drying property, and the gel coat prepared by the resin of the present invention has characteristics of good adhesion, low porosity, easy polishing and the like.

Description

technical field [0001] The invention relates to the technical field of polymer material preparation, in particular to an air-drying unsaturated polyester resin for easy-polishing gel coats and a preparation method thereof. Background technique [0002] With the development of China's FRP industry to this day, one of the issues that everyone is concerned about is how to improve the quality of FRP products. To improve the quality, there must be a good mold. A good FRP mold must be able to meet the accuracy of the product size; it must also meet their structural mechanical properties and mechanical properties according to the product performance; in terms of appearance, it must have a certain degree of smoothness , smoothness, average thickness. [0003] The original model is the most important prerequisite for manufacturing high-quality FRP molds. The choice of base material for the original mold is mainly determined by the type and size of the mold, as well as the experienc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/676C08G63/78
Inventor 钱永嘉
Owner CHANGZHOU HUAKE POLYMERS
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