Gel coating resin and production thereof

A technology of gel coat resin and manufacturing method, which is applied in the direction of polyester coating, coating, etc., can solve the problem of insufficient thickening and thixotropy of gel coat resin, poor dispersion effect, and poor long-term rheological properties of gel coat resin And other problems, to achieve the effect of high gloss, good practicability, stable weather resistance and mechanical properties

Active Publication Date: 2007-06-06
CHANGZHOU TIANMA GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, if a blade or propeller agitator is used for mixing and dispersing, the dispersion effect of fumed silica and additives in the gel coat resin system is poor, which makes the thickening and thixotropic effect of fumed silica on the gel coat resin It cannot be fully utilized; the effect of using a high-speed disperser is better, and its dispersion quality depends on the speed of the turntable and the dispersion time of the high-speed disperser, but there are still large agglomerates of fumed silica in the gel coat resin, resulting in gel coat Poor long-term rheological properties of the resin

Method used

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  • Gel coating resin and production thereof

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Experimental program
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Effect test

Embodiment 1

[0035] (embodiment 1, gel coat resin)

[0036] The gel coat resin in this embodiment is composed of matrix resin, thixotropic agent and liquid additives. Wherein the matrix resin is the ortho-phthalic unsaturated polyester resin in the liquid unsaturated polyester resin, and its brand name, the factory of purchase are shown in Table 2; This unsaturated polyester resin adopts gel permeation chromatography (GPC) to detect, The instrument used is a 515 gel permeation chromatograph (model G02515911M, manufactured by Waters, USA), and the relevant physicochemical parameters obtained are shown in Table 2. The thixotropic agent is powdered fumed silica, which is manufactured by Weikai Company in Germany, and its specific surface area is 210m 2 / g. Liquid additives include defoamers and leveling agents. Among them, the defoaming agent adopts the brand of EFKA2022 liquid organic modified polysiloxane manufactured by Efka Company of the Netherlands, and the leveling agent adopts the ...

Embodiment 2

[0044] (embodiment 2, gel coat resin)

[0045] All the other are identical with embodiment 1, difference is: the specific surface area of ​​used fumed silica is 190m 2 / g, the weight ratio of each component is as follows: 100 parts of liquid matrix resin; 2 parts of powdery fumed silica; 0.1 part of liquid defoamer; 0.1 part of liquid leveling agent. The trade mark, manufacturer and corresponding physicochemical parameters of the matrix resin selected in this embodiment are provided by the corresponding column of table 2; Press GB7193.1-87 measurement method, adopt Brookfield viscometer to measure respectively this gel coat resin at 6rpm / min and the viscosity at 60r / min, the thixotropic index is 4.3; the fineness of the gel coat resin is detected as 20 μm with a scraper fineness meter; the gel coat resin layer obtained after curing and molding is glossy and has a smooth surface without pinholes. The cured and molded gel coat resin layer was tested, and its tensile strength wa...

Embodiment 3

[0046] All the other are identical with embodiment 1, difference is: the specific surface area of ​​used fumed silica is 200m 2 / g, the weight ratio of each component is as follows: 100 parts of liquid matrix resin; 2.2 parts of powdery fumed silica; 0.5 parts of liquid defoamer; 0.5 parts of liquid leveling agent. The grade, manufacturer and corresponding physicochemical parameters of the matrix resin used in this embodiment are provided by the corresponding columns of Table 2; according to the GB7193.1-87 measurement method, the Brookfield viscometer is used to measure the gel coat resin at 6r / min respectively. and the viscosity at 60r / min, the thixotropic index is 4.4; the fineness of the gel coat resin is detected as 10 μm with a scraper fineness meter; the gel coat resin layer obtained after curing and molding is glossy and has a smooth surface without pinholes. The cured and molded gel coat resin layer was tested, and its tensile strength was 70MPa, its elongation was 2.0...

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Abstract

A gel coating resin and its production are disclosed. The resin consists of matrix resin, thixotropic agent and liquid assistants. Matrix resin is liquid unsaturated polyester resin, thixotropic agent is powdery gas-phase silicon dioxide, liquid assistants consist of anti-bubbling agent and leveling agent, average molecular weight of unsaturated polyester resin is 2000-4000, distribution index of molecular weight is 1.05-2.5, viscosity of matrix resin is 300-1500mPa.s, and fineness of gel coating resin system is 5-30mum. The process is carried out by mix and dispersion treating for matrix resin, gas-phase silicon dioxide and assistants from high-speed disperser and sand mill, and producing gel coating resin product with fineness of mixed material 5mum-30mun. It achieves good thixotropy and surface quality.

Description

technical field [0001] The present invention relates to a resin and its manufacturing method. Background technique [0002] Gel coat resin is a special variety of resins, mainly used for coating on the surface of substrate resin or laminated materials. When the gel coat resin is cured and formed, it forms a continuous thin layer covering the surface of the substrate, that is, the gel coat resin layer. . The role of the gel coat resin layer is to provide a protective layer for the base resin or laminated material, improve the weather resistance, corrosion resistance, wear resistance and other properties of the product, and give the product a bright and beautiful appearance. Since the gel coat resin layer should play an important role in protecting the performance of the product and prolonging the service life, the gel coat resin layer must have good water resistance, chemical resistance, corrosion resistance, wear resistance, impact resistance and other properties as well as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/06
Inventor 敖文亮史建军朱文元刘臣柱杨令宣维栋吴晓卫朱荣幸
Owner CHANGZHOU TIANMA GROUP CO LTD
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