Silicon-containing tung oil-based alkyd resin as well as preparation method and application of alkyd resin

A technology of alkyd resin and tung oil, applied in the direction of coating, can solve the problems of water resistance and poor heat resistance of alkyd resin, and achieve the effects of stable product quality, easy industrial expansion of production, and strong practicability

Active Publication Date: 2015-07-01
徐州市洛克尔化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem to be solved: the purpose of this invention is to develop new varieties of alkyd resins and overcome the shortcomings of alkyd resins such as poor water resistance and heat resistance

Method used

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  • Silicon-containing tung oil-based alkyd resin as well as preparation method and application of alkyd resin
  • Silicon-containing tung oil-based alkyd resin as well as preparation method and application of alkyd resin
  • Silicon-containing tung oil-based alkyd resin as well as preparation method and application of alkyd resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12

[0027] Add 5g of tung oil and the calculated amount of maleic anhydride to a 25mL disposable light-transmitting vial, put it into a polytetrafluoroethylene reactor and seal it with a cap. The reactor is placed on a polypropylene rotatable chassis and secured with bolts. Then put the whole device into Ethos MicroSYNTH 1600 microwave synthesizer (Milestone Company, USA), and carry out microwave heating reaction while rotating. , the reaction pressure is controlled by the temperature of the closed system. Its product is light yellow thin transparent liquid to dark brown opaque liquid. The reaction conditions such as the proportion of reaction raw materials, reaction power, reaction time, amount of catalyst added, and whether to pressurize are shown in the table below. After the reaction was complete, vacuum was used to remove unreacted maleic anhydride. Under optimal conditions, the acid value of the maleinized oil is 44.9-187.9 mgKOH / g, that is, the number of maleic anhydride...

Embodiment 13

[0032] Add 10g of tung oil and 0.9g of maleic anhydride to a 50mL three-neck round bottom flask, heat and stir in an oil bath and pass nitrogen gas. When the temperature rises to 80°C, react for 1h. Continue to add 0.9g of maleic anhydride, raise the temperature to 100°C, and react for 1h. Finally, 0.9 g of maleic anhydride was added, the temperature was raised to 120° C., and the reaction was carried out for 1 h. Finally, a light brown transparent liquid was obtained. After vacuum purification of the obtained maleic anhydride soybean oil, the acid value is about 203.1 mgKOH / g, that is, the number of maleic anhydride attached to each fatty acid chain is 0.60.

Embodiment 14

[0034] Add maleic anhydrided tung oil (Example 3) and hydroxyl-terminated polydimethylsiloxane with a molecular weight of 550 into a 40mL light-transmitting vial, wherein the ratio of anhydride to hydroxyl is 1:2, and add 1% of the total weight of the reaction system 2-methylimidazole was stirred at 110°C for 3h, then the mixture was poured into a preheated silica gel mold and degassed for 15min at a temperature of 110°C. It was placed in an oven, cured at 120°C for 24h and post-treated at 160°C for 2h. Finally, a light brown opaque silicon-containing tung oil alkyd resin was obtained.

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Abstract

The invention provides a silicon-containing tung oil-based alkyd resin as well as a preparation method and an application of the alkyd resin. The maleic anhydride is reacted with the tung oil under conventional heating or microwave heating to obtain maleic anhydride modified tung oil; the reaction of the maleic anhydride and the tung oil is the reaction of the double bond of the maleic anhydride with an unsaturated double bond on a fatty acid chain; after the reaction is completed, the unreacted maleic anhydride is removed by use of the method of heating and vacuumizing, and recovered by use of a condensing device for later use; under the action of a catalyst, the maleic anhydride modified tung oil is mixed with hydroxy-terminated polydimethylsiloxanes different in molecular weights for thermosetting cross-linking; and besides, vacuum degassing treatment is performed and finally, the silicon-containing tung oil-based alkyd resin can be obtained. The silicon-containing tung oil-based alkyd resin is prepared by use of a two-step synthesis technique; the method is easy to operate and the product quality is stable; and the process is quite simple, prone to industrial enlarged production and high in practicability.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a silicon-containing tung oil-based alkyd resin and a preparation method thereof. The resin prepared by this method can be used as a hydrophobic material. Background technique [0002] Polymer materials have a huge impact on human production and life. At present, the raw materials for synthetic polymer materials still mainly come from petroleum. However, due to the double influence of the earth's petrochemical resource storage decline and environmental pollution, the synthesis of polymer materials from natural renewable resources has gradually attracted people's attention. Among many natural renewable resources, natural oils are favored due to their low price and certain degradability. [0003] Natural oils are a large class of natural organic compounds defined as mixtures of mixed fatty acid triglycerides. As far as general natural oil is concerned, 95% of its co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38C09D183/06
Inventor 刘承果周永红刘增社杨晓慧冯国东尚倩倩胡云
Owner 徐州市洛克尔化工科技有限公司
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