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Method for preparing unsaturated polyester resin used in putty

A technology of polyester resin and unsaturated fatty acid, which is applied in the field of preparation of unsaturated polyester resin, and can solve the problem of shortening the curing time of the resin

Inactive Publication Date: 2013-05-08
CHANGZHOU HUARUN COMPOSITE MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of the automobile industry, in order to improve the filling efficiency, the baking temperature must be increased, but if the baking temperature is too high, the curing time of the resin will be shortened

Method used

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  • Method for preparing unsaturated polyester resin used in putty
  • Method for preparing unsaturated polyester resin used in putty

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare the unsaturated polyester resin for putty as follows:

[0020] 1) Using linseed oil, linseed oleic acid and trimethylolpropane to synthesize macromolecular air-drying alcohol

[0021] Put in 1500g of linseed oil, then add 465g of trimethylolpropane and 0.6g of lithium hydroxide, stir for 10 minutes, gradually raise the temperature of the reaction materials to 175°C-185°C, and fully mix the reaction materials with 3 times the volume of methanol , when the resulting liquid is transparent, that means the reaction is complete.

[0022] 2) Synthetic soft resin

[0023] Put in 1280g diethylene glycol, 395g adipic acid and 895g isophthalic acid, stir to disperse evenly, then gradually raise the temperature to 215°C-220°C for reaction, when the solid acid value is below 50mgKOH / g, cool down to 160°C and add 395g Maleic anhydride, and continue to heat up to 215°C-220°C, react until the acid value of the liquid is 10-14mgKOH / g (test ratio: polyester / styrene=17 / 8). Cool...

Embodiment 2

[0027] Prepare the unsaturated polyester resin for putty as follows:

[0028] 1) Using linseed oil, linseed oleic acid and trimethylolpropane to synthesize macromolecular air-drying alcohol

[0029] Put in 1600g of linseed oil, then add 480g of trimethylolpropane and 1.2g of lithium hydroxide, stir for 10 minutes, gradually raise the temperature of the reaction materials to 175°C-185°C, and fully mix the reaction materials with 3 times the volume of methanol , when the resulting liquid is transparent, that means the reaction is complete.

[0030] 2) Synthetic soft resin

[0031] Put in 1250g diethylene glycol, 110g ethylene glycol, 415g adipic acid and 905g isophthalic acid, stir to disperse evenly, then gradually raise the temperature to 215°C-220°C for reaction, when the solid acid value is below 50mgKOH / g, cool down Add 395g of maleic anhydride to 160°C, and continue to heat up to 215°C-220°C, react until the acid value of the liquid is 10-14mgKOH / g (test ratio: polyester...

Embodiment 3

[0035] Prepare the unsaturated polyester resin for putty as follows:

[0036] 1) Using linseed oil, linseed oleic acid and trimethylolpropane to synthesize macromolecular air-drying alcohol

[0037] Put in 1600 g of linseed oleic acid, then add 480 g of trimethylolpropane and 1.2 g of lithium hydroxide, stir for 10 minutes, gradually raise the temperature of the reaction material to 175°C-185°C, and fully mix the reaction material with 3 times the volume of methanol When the resulting liquid is transparent, it indicates that the reaction is complete.

[0038] 2) Synthetic soft resin

[0039] Put in 1250g diethylene glycol, 110g ethylene glycol, 415g adipic acid and 905g isophthalic acid, stir to disperse evenly, then gradually raise the temperature to 215°C-220°C for reaction, when the solid acid value is below 50mgKOH / g, cool down Add 395g of maleic anhydride to 160°C, and continue to heat up to 215°C-220°C, react until the acid value of the liquid is 10-14mgKOH / g (test ratio...

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Abstract

The invention relates to a method used for preparing unsaturated polyester resin used in putty. According to the invention, an unsaturated acid and trimethylol propane are synthesized into macro-molecular air-drying alcohol; soft resin is synthesized by using monomers such as dihydric alcohol, adipic acid, isophthalic acid, maleic anhydride, and styrene; and the unsaturated polyester resin provided by the invention is prepared by using ethylene glycol, diethylene glycol, the synthesized macro-molecular air-drying alcohol, fumaric acid, tetrahydrophthalic anhydride, styrene, the synthesized soft resin, and acrylic acid. When the unsaturated polyester resin provided by the invention is prepared into putty, an adhesion force is no smaller than 4.0, an impact resistance is no smaller than 15cm, and no cracking and falling is caused after 1h of heating under a temperature of 220 DEG C (plus or minus 2 DEG C).

Description

technical field [0001] The invention relates to a method for preparing unsaturated polyester resin, in particular to a method for preparing unsaturated polyester resin for atomic ash. Background technique [0002] Unsaturated polyester resin (Unsaturated Polyester Resin, UPR) is generally a polycondensation of unsaturated dibasic acid and diol or saturated dibasic acid and unsaturated diol, which has ester bonds and unsaturated double bonds. type polymer compound. The mixture is copolymerized under the action of heat, light or an initiator, and cross-linked to form a solid material with a spatial network structure. As the most widely used thermosetting resin, the products made of it have excellent properties such as light weight, high strength, chemical corrosion resistance and good electrical insulation, and the molding method is simple, which is convenient for manufacturing large or complex plastics Products (such as: FRP). Unsaturated polyester resin has been widely us...

Claims

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Application Information

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IPC IPC(8): C08G63/676C08F283/01C09D5/34
Inventor 包柏青李秋萍刘世仓
Owner CHANGZHOU HUARUN COMPOSITE MATERIALS
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