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Siloxane modified cardanol derivative prepolymer as well as preparation method and application thereof

A technology of siloxane modification and cardanol, which is applied in the direction of polyurea/polyurethane coatings and coatings, can solve the problems of non-compliance with environmental protection, and improve storage stability, batch stability, process equipment and operating environment less demanding effect

Active Publication Date: 2020-07-10
广州五行材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increasing application of coatings and inks, the amount of pigments and their dispersing aids is also increasing. However, the currently used pigment dispersants are generally prepared from non-renewable and non-environmental protection raw materials, which do not meet the current environmental protection requirements.

Method used

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  • Siloxane modified cardanol derivative prepolymer as well as preparation method and application thereof
  • Siloxane modified cardanol derivative prepolymer as well as preparation method and application thereof
  • Siloxane modified cardanol derivative prepolymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put cashew nut shell oil polyester diol (viscosity of 1400cps at 25°C, hydroxyl value of 75mgKOH / g), 3-isocyanate propyltrimethoxysilane, organic bismuth catalyst into the equipment equipped with high and low temperature circulation pump, thermometer and stirring In the reaction kettle of the rod, the whole process is protected by nitrogen, and the reaction is carried out at a constant temperature of 90°C for 4 hours, and then samples are taken every 0.5 hours using a Fourier transform infrared spectrometer to monitor the characteristic peak of NCO. When the NCO peak completely disappears, the material is cooled and filtered to obtain silicon Oxyalkylene modified cardanol derivative prepolymer. Among them, the molar ratio of the OH of cashew nut shell polyester diol to the NCO of 3-isocyanatopropyl trimethoxysilane is 1:0.5, and the organic bismuth catalyst is cashew nut shell oil polyester diol and 3-isocyanatopropyl trimethoxysilane. 0.2‰ of the total weight of trimet...

Embodiment 2

[0027] Put cashew nut shell oil phenolic resin diol (viscosity of 1000cps at 25°C, hydroxyl value of 175mgKOH / g) 3-isocyanatopropylmethyldimethoxysilane and organic bismuth catalyst into the equipment equipped with high and low temperature circulating pumps and thermometers. In the reaction kettle with a stirring rod, under nitrogen protection throughout the whole process, react at a constant temperature of 80°C for 6h, and then take samples every 0.5h and use a Fourier transform infrared spectrometer to monitor the NCO characteristic peak. When the NCO peak disappears completely, cool down and filter the material to prepare A siloxane-modified cardanol derivative prepolymer was obtained. Among them, the molar ratio of the OH of cashew nut shell oil phenolic resin diol to the NCO of 3-isocyanatopropylmethyldimethoxysilane is 1:1, and the organic bismuth catalyst is cashew nut shell oil phenolic resin diol and 3- 0.6‰ of the total weight of isocyanatopropylmethyldimethoxysilane...

Embodiment 3

[0029] Put cashew nut shell oil branched polyol (viscosity of 2900cps at 25°C, hydroxyl value of 175mgKOH / g), 3-isocyanatopropyltriethoxysilane, organic bismuth catalyst into the equipment equipped with high and low temperature circulation pump, thermometer and In the reaction kettle with a stirring rod, under nitrogen protection throughout the whole process, react at a constant temperature of 85°C for 5 hours, and then take samples every 0.5 hours and use a Fourier transform infrared spectrometer to monitor the NCO characteristic peak. When the NCO peak completely disappears, cool down and filter the material to obtain Siloxane-modified cardanol derivative prepolymer. Among them, the molar ratio of the OH of cashew nut shell oil branched chain polyol to the NCO of 3-isocyanatopropyltriethoxysilane is 1:0.8, and the organic bismuth catalyst is cashew nut shell oil branched chain polyol and 3-isocyanate group 0.4‰ of the total weight of propyltriethoxysilane.

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Abstract

The invention belongs to the technical field of high-molecular polymerization, and discloses a siloxane modified cardanol derivative prepolymer as well as a preparation method and application thereof.The siloxane modified cardanol derivative prepolymer is prepared by putting cashew nut shell oleyl alcohol, isocyanate propyl silane and a catalyst into a reaction kettle in a nitrogen protective atmosphere, reacting at 80-90 DEG C, sampling, monitoring an NCO characteristic peak by adopting a Fourier infrared spectrometer until the NCO characteristic peak completely disappears, cooling, filtering and discharging. The molar ratio of OH of the cashew nut shell oleyl alcohol to NCO of the isocyanate propyl silane is 1: (0.5-1). The cashew nut shell oleyl alcohol can interact with pigment through large pi conjugation or hydrogen bonds, the wettability of the pigment can be improved, and the cashew nut shell oleyl alcohol is used for dispersing the pigment. Meanwhile, the cardanol derivativeprepolymer is grafted to the surface of the pigment, so that the storage stability of the pigment is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of polymer polymerization, and more specifically relates to a siloxane-modified cardanol derivative prepolymer and its preparation method and application. Background technique [0002] Most of the pigments exist in the form of powder or granules. When they are used in the fields of coatings or inks, it is generally necessary to add pigment dispersants or stabilizers to stably disperse the pigment particles in the coatings or inks. With the increasing application of coatings and inks, the amount of pigments and their dispersing aids is also increasing. However, the currently used pigment dispersants are generally prepared from non-renewable and non-environmental protection raw materials, which do not meet the current environmental protection requirements. . Contents of the invention [0003] In order to solve the deficiencies in the above-mentioned prior art, the present invention provides a siloxane-modif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/36C08G18/77C09D175/14C09D175/04
CPCC08G18/36C08G18/778C09D175/14C08L75/04
Inventor 贾国忠曾雪标丁成龙王蕾罗燕群
Owner 广州五行材料科技有限公司
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