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Preparation method of flame-retardant core-shell-type acrylic resin

A core-shell type, acrylic technology, applied in coatings, textiles, papermaking, fiber treatment, etc., can solve the problems of poor flame retardancy, achieve good compatibility, low price, and improve flame resistance

Inactive Publication Date: 2014-04-16
北京世纪蓝箭防水材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a method for preparing a flame-retardant core-shell type acrylic resin, by modifying the acrylic resin to improve its flame retardancy, so as to solve the problem of poor flame retardancy of the current acrylic resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] (1) Add 50g of deionized water, 0.33g of emulsifier sodium lauryl sulfate and fatty alcohol polyoxyethylene ether (the type of fatty alcohol polyoxyethylene ether is OS-15, non-ionic type, purchased from Jiangsu Haian Petrochemical Plant, the same below) 0.17g, methacrylic acid 0.3g, raise the reaction temperature to 40°C, stir for 15min, add A monomer, and emulsify for 30min. When the temperature rises to 70°C, reflux water is passed, and when the temperature reaches 75°C, 0.2 g of potassium persulfate is added dropwise for 1 hour, followed by a heat preservation reaction for 3 hours, 1 g of dimethyl methyl phosphonate is added dropwise, and the reaction time is 1 hour to obtain a nucleus layer emulsion;

[0025] A monomer and its dosage: A monomer is composed of 6g of butyl acrylate, 4g of methyl methacrylate and 2.5g of ethyl acrylate;

[0026] (2) Add B monomer and potassium persulfate 0.3g dropwise to the core layer emulsion at the same time, dropwise adding time ...

example 2

[0029] (1) Add 70g of deionized water, 1.2g of emulsifier sodium lauryl sulfate, 0.6g of fatty alcohol polyoxyethylene ether, and 3.0g of methacrylic acid into the three-necked flask, raise the reaction temperature to 40°C, and stir for 15 minutes. Add A monomer, emulsification time 45min. When the temperature rises to 70°C, flow back water, and when the temperature reaches 75°C, start to add 0.4g of ammonium persulfate dropwise for 3 hours, keep warm for 5 hours, add 3g of dimethyl phosphite dropwise, and react for 3 hours to obtain a core layer emulsion ;

[0030] A monomer and its dosage: A monomer is composed of 8g of butyl acrylate, 6g of methyl methacrylate and 3.5g of ethyl acrylate;

[0031] (2) Add B monomer and ammonium persulfate 0.5g dropwise to the core layer emulsion at the same time, dropwise for 3h, 85°C for 2h, add calcium-based bentonite dispersion 20g, keep warm for 3h, then drop three Methylolpropane trimethacrylate 1.0g, keep warm for 2 hours, cool down ...

example 3

[0034] (1) Add 60g of deionized water, 0.8g of emulsifier sodium lauryl sulfate, 0.4g of fatty alcohol polyoxyethylene ether, and 1.7g of methacrylic acid into the three-necked flask, raise the reaction temperature to 40°C, and stir for 15min. Add A monomer, and the emulsification time is 35min. When the temperature rises to 70°C, reflux water is passed, and when the temperature reaches 75°C, 0.3g of ammonium persulfate is added dropwise, the dropwise addition time is 2h, the heat preservation reaction is 4h, and 2g of trimethylsilylmethylphosphonic acid dimethyl is added dropwise, and the reaction time is 2h , to obtain the core layer emulsion;

[0035] A monomer and its dosage: A monomer is composed of 7g of butyl acrylate, 5g of methyl methacrylate and 3.0g of ethyl acrylate;

[0036] (2) Add B monomer and ammonium persulfate 0.4g dropwise to the core layer emulsion at the same time, add dropwise for 2 hours, keep warm for 2 hours at 80°C, add 15g of calcium-based bentonit...

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Abstract

The invention relates to a preparation method of flame-retardant core-shell-type acrylic resin, which comprises the following steps of: adding deionized water, emulsifying agent, methacrylic acid and monomers A for emulsification, starting to drop initiator when temperature reaches 75DEG C, keeping dropping time to be 1-3h, preserving heat for reaction for 3-5h, dropping ester compounds and keeping reaction time to be 1-3h to obtain core-layer emulsion; and simultaneously adding monomers B and initiator into the core-layer emulsion, keeping dropping time to be 1-3h, preserving heat at 75-85DEG C for reaction for 2h, dropping bentonite dispersion liquid with mass percent being 20 percent, preserving heat for reaction for 1-3h, dropping cross-linking agent, preserving heat for reaction for 1-2h, decreasing temperature to 50DEG C, adding emulsifying agent into a reaction system, keeping reaction time to be 30min, and adding ammonia water to regulate pH (potential of hydrogen) to 7-8 to obtain the flame-retardant core-shell-type acrylic resin. The obtained acrylic resin has the advantages that not only can the defect of hot sticking and cold shortness of the traditional acrylic resin be improved, but also the flame retardation of the acrylic resin can be improved.

Description

technical field [0001] The invention relates to a preparation method of an acrylic resin used in the leather finishing process, in particular to a preparation method of a flame-retardant core-shell type acrylic resin. Background technique [0002] Leather products have good comprehensive performance and are widely used in the interior decoration of buildings, aircraft, automobile interior decoration and office furniture manufacturing and other fields. As a very important process in tanning and finishing, finishing can not only make up for the lack of performance of crust leather, but also improve the use value and meet the diverse needs of consumers. [0003] Acrylic resin is a kind of leather finishing agent widely used at present. It has the advantages of flexible film formation, high elasticity, light resistance, aging resistance, wet rub resistance, and low cost of the coating. However, the acrylic resin coating agent with a linear structure is a thermoplastic material,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F220/58C08F220/28C08F222/20C08F2/44C08F2/30C08F2/26C08F4/30C08K3/34C09D133/08D06M15/263
Inventor 段宝荣韩欣雷笑宇王全杰
Owner 北京世纪蓝箭防水材料有限公司
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