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Preparation method of melamine resin double coated Deca-BDE

A technology of decabromodiphenyl ether and formaldehyde resin, which is applied in the direction of fire-resistant coatings, etc., can solve the problems of hindering the application of brominated flame retardants and the inability to achieve flame-retardant effects, and achieve good compactness, fast curing speed, and coating full effect

Inactive Publication Date: 2007-10-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, for polymers with extremely high processing temperatures used in aerospace, electronics and other fields, such as polyimide, etc., when flame retardant treatment is required, the decomposition temperature (345°C) of traditional brominated flame retardants is lower than The processing temperature of these materials will decompose and fail due to the inability to withstand high processing temperatures during the processing of materials such as polyimide (processing temperature is 380-390 ° C), and cannot achieve the proper flame retardant effect. , thus hindering the application of brominated flame retardants such as decabromodiphenyl ether in these materials

Method used

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  • Preparation method of melamine resin double coated Deca-BDE

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Effect test

Embodiment 1

[0024] (1) Add 20kg of decabromodiphenyl ether, 0.5kg of styrene maleic anhydride resin, 0.5kg of Tween 20, and 100kg of water into a reaction kettle with a stirrer and a thermometer, and heat up to 80°C at a stirring speed of 3000rpm. the dispersion;

[0025] (2) 15kg of melamine, 50kg of 37% formaldehyde solution, and 80kg of water are added together in a reaction kettle with a stirrer and a thermometer to stir and mix. When the temperature rises to 80°C, adjust its pH value to 8 with sodium carbonate, and then stir for 10 Obtain transparent melamine formaldehyde resin prepolymer in minutes;

[0026] (3) The melamine-formaldehyde resin prepolymer obtained in the step (2) is divided into two parts on average, one part is added to the dispersion liquid obtained in the step (1) and mixed, and then the pH value is adjusted to 5 with acetic acid. Keep the temperature at 80°C, stir and react at a stirring speed of 3000rpm for 2 hours, then add another part of melamine formaldehyd...

Embodiment 2

[0030] (1) Add 100kg of decabromodiphenyl ether, 10kg of polyvinyl alcohol, 10kg of Tween 60, and 100kg of water into a reaction kettle with a stirrer and a thermometer, and heat up to 70°C at a stirring speed of 1000rpm to disperse them;

[0031] (2) Add 20kg of melamine, 60kg of 37% formaldehyde solution, and 150kg of water together into a reaction kettle with a stirrer and a thermometer and stir and mix them. When the temperature rises to 70°C, adjust its pH value to 9 with sodium hydroxide, and then stir the reaction Obtain transparent melamine formaldehyde resin prepolymer in 30 minutes;

[0032] (3) The melamine-formaldehyde resin prepolymer obtained in step (2) is divided into two parts on average, one part is added to the dispersion liquid obtained in step (1) and mixed, then the pH value is adjusted to 3 with hydrochloric acid. Keep the temperature at 70°C and stir at a stirring speed of 1000rpm for 1 hour, then add another part of melamine-formaldehyde prepolymer, an...

Embodiment 3

[0036] (1) Add 40 kg of decabromodiphenyl ether, 80 5 kg of Tween, 40 7 kg of Tween, and 450 kg of water into a reaction kettle with a stirrer and a thermometer, and heat up to 80 ° C at a stirring speed of 2500 rpm to disperse it;

[0037] (2) Add 5 kg of melamine, 10 kg of 37% formaldehyde solution, and 50 kg of water together into a reaction kettle with a stirrer and a thermometer and stir and mix them. When the temperature rises to 80°C, adjust the pH value to 7 with sodium bicarbonate, and then stir the reaction Obtain transparent melamine formaldehyde resin prepolymer in 10 minutes;

[0038] (3) The melamine-formaldehyde resin prepolymer obtained in step (2) is divided into two parts on average, one of them is added to the dispersion obtained in step (1) and mixed, then the pH value is adjusted to 4 with acetic acid. Keep the temperature at 80°C, stir and react at a stirring speed of 2500rpm for 3 hours, then add another part of melamine formaldehyde prepolymer, and reac...

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Abstract

This invention relates to a preparation method of melamine formaldehyde resin double deck coating decabromodiphenyl oxide. It takes 20 to 100 shares decabromodiphenyl oxide, dispersant 1 to 20 shares, water 100 to 1000 shares or melamine 5 to 20 shares, 37 percent formalin 10 to 60 shares, water 50 to 150 shares as materials; mix these materials and whip at PH 7 to PH 9 to prepare dispersal liquid or melamine formaldehyde resin prepolymer, then break prepolymer into two shares, add one share to dispersal liquid for blending, then adjust PH value to 3 to 5, whip for 1 to 4 hour for reaction; Then add another share of prepolymer, carry out reaction for 1 to 4 hours, gain white emulsion; finally separate emulsion, dry to gain white mealiness product. This product has good compactness, high initial decomposition temperature, high tensile and compressive strength, good water-proof, can used as additive flame-retardant of polymer that has very high processing temperature, enlarge the field of application of decabromodiphenyl oxide.

Description

technical field [0001] The invention belongs to the technical field of flame retardant preparation, and in particular relates to a method for preparing decabromodiphenyl ether double-coated with melamine-formaldehyde resin. Background technique [0002] Decabromodiphenyl ether is a white powder, insoluble in water and general organic solvents, and is an additive-type high-efficiency flame retardant. Because of its high bromine content and low addition amount, it is widely used as polyethylene, polypropylene, ABS resin, polyphenylene ether, polycarbonate, polyurethane, polyvinyl chloride, epoxy resin, PBT, PET, silicone rubber and Flame retardant for polymer materials such as EPDM rubber, and flame retardant additive for rubber conveyor belts, petroleum processing, and industrial rubber products. The flame retardant mechanism of decabromodiphenyl ether is based on the theory of "free radical capture" in the gas phase, that is, decabromodiphenyl ether will decompose to genera...

Claims

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Application Information

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IPC IPC(8): C08G12/32C08K5/06C09K21/08
Inventor 杨鸣波罗文君杨伟蒋舒谢邦互冯建民
Owner SICHUAN UNIV
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