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Acrylic polyurethane modified tung oil-imide addition product and preparation method thereof

A technology of acrylic polyurethane and tung oil imide, applied in polyester coatings, coatings, etc., can solve the problems of fast curing speed and slow curing epoxy speed

Inactive Publication Date: 2011-06-08
CHINESE ELECTRICAL EQUIP GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the ring-opening curing speed between acid anhydride and epoxy is usually not as fast as the curing speed initiated by unsaturated double bond free radicals, the curing speed of tung oil anhydride curing epoxy is relatively slow, while the curing speed of the product participating in the unsaturated resin system is relatively fast

Method used

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  • Acrylic polyurethane modified tung oil-imide addition product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 1,000 grams of refined dehydrated tung oil and add it to the reactor, start stirring, heat to 90°C, gradually add 270 grams of maleic anhydride, raise the reaction temperature and control it at about 150°C, react for 40 minutes, and cool down to below 120°C. Gradually add 168 grams of ethanolamine, keep it below 140°C for 0.5 hours, fully form amic acid, then raise the temperature to 180°C, and carry out imide cyclization reaction. During the reaction, water will evaporate, keep at 180°C for 1 hour and then vacuumize and dehydrate . Cool down to below 100°C, add an appropriate amount of polymerization inhibitor MEHQ (p-methoxyphenol), add 600-800 grams of styrene to dilute, and cool down for later use, which is component one.

[0021] Add 479 grams of TDI to another reactor, and gradually drop 358 grams of hydroxypropyl acrylate to react with it. The process needs to be cooled and the reaction temperature should not be higher than 60 ° C. After the reaction is comp...

Embodiment 2

[0024] Take 1000 grams of refined dehydrated tung oil into the reactor, start stirring, heat to 90°C, gradually add 275 grams of maleic anhydride, raise the reaction temperature and control it at about 150°C, react for 40 minutes, and cool down to below 120°C. Gradually add 171 grams of ethanolamine, keep it below 140°C for 0.5 hours, fully form amic acid, then raise the temperature to 180°C, and carry out imide cyclization reaction. During the reaction, water will evaporate, keep at 180°C for 1 hour and then vacuumize and dehydrate . Cool down to below 100°C, add an appropriate amount of polymerization inhibitor MEHQ (p-methoxyphenol), add 600-800 grams of styrene to dilute, and cool down for later use, which is component one.

[0025] Add 489 grams of TDI to another reactor, and gradually add 365 grams of hydroxyethyl methacrylate to react with it. The process needs to be cooled and the reaction temperature should not be higher than 60 ° C. After the reaction is completed, i...

Embodiment 3

[0028] Take 1000 grams of refined dehydrated tung oil into the reactor, start stirring, heat to 90°C, gradually add 250 grams of maleic anhydride, raise the reaction temperature and control it at about 150°C, react for 40 minutes, and cool down to below 120°C. Gradually add 156 grams of ethanolamine, keep it below 140°C for 0.5 hours, fully form amic acid, then raise the temperature to 180°C, and carry out imide cyclization reaction. During the reaction, water will evaporate, keep at 180°C for 1 hour, then vacuumize and dehydrate . Cool down to below 100°C, add an appropriate amount of polymerization inhibitor MEHQ (p-methoxyphenol), add 600-800 grams of styrene to dilute, and cool down for later use, which is component one.

[0029] Add 445 grams of TDI to another reactor, and gradually add 368 grams of hydroxypropyl methacrylate to react with it. The process needs to be cooled and the reaction temperature should not be higher than 60 ° C. After the reaction is completed, it ...

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Abstract

The invention relates to the field of insulating paint additives, in particular to an acrylic polyurethane modified tung oil-imide addition product and a preparation method thereof. The preparation method comprises the following steps of: performing vacuum dehydration on industrial refined tung oil according to a proportion, adding maleic anhydride, controlling the reaction temperature to be between 140 and 160DEG C, reacting for 0.5 to 1 hour, reducing temperature, adding ethanolamine for continuous reaction, vacuumizing and dehydrating, and after the reaction is finished, reducing temperature and adding a solvent for dilution to obtain a component A; reacting hydroxy ethyl acrylate or hydroxy propyl methacrylate with toluene diisocynate according to a molar ratio of 1:1 to obtain -NCO-containing prepolymer serving as a component B; and calculating a proportion according to the mass ratio, dripping the component B into the component A, and controlling the reaction temperature to be not higher than 70DEG C to obtain the final product. The acrylic polyurethane modified tung oil-imide addition product has the basic advantages of tung oil anhydride of water resistance, luster, insulativity and air dryness, and also can endow a paint film with better toughness, strength, heat resistance, fast curing capacity and storage stability.

Description

technical field [0001] The invention relates to the field of insulating paint additives, in particular to an acrylic polyurethane modified tung oil imide adduct. Background technique [0002] In the field of insulating varnishes, especially in the manufacture of solvent-free insulating varnishes of unsaturated systems, tung oil anhydride adduct (TOA) is often used as an essential component. The curing agent, on the other hand, provides the methylene "-CH" with active hydrogen attached to the double bonded carbon 2 -" or -CH<, when baked at high temperature, oxygen absorption, oxidation and hydrogen abstraction process will occur on the surface, and free radicals will be generated, so that the paint will not be affected by air oxygen inhibition, and the surface of the paint film will dry normally and not sticky. In addition, use tung oil It can also endow the paint film with good water resistance, gloss leveling and electrical insulation. However, the tung oil anhydride a...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/10C09D5/25C09D7/12C09D167/06
Inventor 孙宏朱祝文何哲稹冯永康刘飞陈文亮
Owner CHINESE ELECTRICAL EQUIP GRP CO LTD
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