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Preparation method of emulsion antioxidant product

An antioxidant and composite antioxidant technology, applied in the field of preparation of new emulsion antioxidant products, can solve the problems of unstable emulsion, cumbersome production process, poor anti-aging performance, etc., to improve color stability and high temperature heat. Stability, improvement of antioxidant properties, effect of prolongation of oxidative induction period

Active Publication Date: 2013-02-13
浩瀚化学有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] China Plastics, 2008, 22 (4) discloses that the emulsion compounded with antioxidant Irganox 245 and DLTDP is applied in ABS latex, and its disadvantage is the use of Sometimes it is necessary to melt the two kinds of antioxidant solid powder with hot water higher than the melting point, and use it after emulsification, which makes the production process cumbersome. In addition, it is difficult for the antioxidant component to disperse evenly in the emulsion, so that it cannot be dispersed in ABS latex Uniform, resulting in poor anti-oxidation effect of ABS powder
[0009] CN 101654540 discloses a method for preparing a compound antioxidant for ABS latex, using Wingstay-L and thioether antioxidant DLTDP as raw materials, adding Ionized water and 80-90% rosin potassium soap are used for high-speed homogeneous emulsification to prepare emulsion-type antioxidants. The disadvantages are that the anti-aging performance is poor, the emulsion is unstable, and it is easy to condense into a paste product
[0010] CN101805458 discloses a kind of with DLTDP, 1076, Wingstay-L as raw material, prepares the method for emulsion type composite antioxidant, its weak point is that anti-aging property is poor , The emulsion is unstable, and it is easy to condense into a paste product

Method used

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  • Preparation method of emulsion antioxidant product

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Experimental program
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Effect test

Embodiment 1

[0036] Add 100 g of isooctyl thioglycolate, 79.5 g of 37% formaldehyde solution, 80 g of toluene, and 1.0 g of methanesulfonic acid into a 500 mL three-neck flask equipped with a stirrer, reflux condensation water separator, and thermometer, and stir to raise the temperature to 110-115 ℃, carry out reflux reaction at this temperature, at the same time, continuously remove water from the reaction liquid through the reflux condensation water separator, reflux reaction for 2.0h, the reaction is completed, cool the reaction liquid to 25-35 ℃, wash with water to remove acidity Catalyst until the reaction liquid is close to neutral, and the toluene in the reaction liquid is distilled off to obtain a colorless and transparent liquid, which is the methylene dithioester compound described in the present invention.

Embodiment 2

[0038] Add 100 g of isooctyl thioglycolate, 95.4 g of 37% aqueous formaldehyde solution, 100 g of cyclohexane, and 0.5 g of trifluoromethanesulfonic acid into a 500 mL three-neck flask equipped with a stirrer, reflux condensation water separator, and thermometer, and stir to heat up to 79 -81°C, carry out reflux reaction at this temperature, at the same time, continuously remove water from the reaction liquid through the reflux condensation water separator, reflux reaction for 3.0h, the reaction is completed, cool the reaction liquid to 25-35°C, wash with water The acidic catalyst is removed until the reaction liquid is close to neutral, and the cyclohexane in the reaction liquid is distilled off to obtain a colorless and transparent liquid, which is the methylene dithioester compound described in the present invention.

Embodiment 3

[0040] Add 100 g of isooctyl thioglycolate, 103.3 g of 37% formaldehyde solution, 120 g of cyclohexane, and 1.5 g of chloroformsulfonic acid into a 500 mL three-necked flask equipped with a stirrer, reflux condensation water separator, and thermometer, and stir to heat up to 96 -98°C, carry out reflux reaction at this temperature, at the same time, continuously remove water from the reaction liquid through the reflux condensation water separator, reflux reaction for 4.0h, the reaction is completed, cool the reaction liquid to 25-35°C, wash with water The acidic catalyst is removed until the reaction liquid is close to neutral, and the cyclohexane in the reaction liquid is distilled off to obtain a colorless transparent liquid, which is the methylene dithioester compound described in the present invention.

[0041] 2. Preparation of new emulsion antioxidant products

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Abstract

The invention provides a preparation method of an emulsion antioxidant product and belongs to the technical field of preparation of synthetic material antioxidant products. The emulsion antioxidant product is used for acrylonitrile butadiene styrene acrylonitrile butadiene styrene (ABS) grafting powder by means of an emulsion polymerization technology. Phenolic antioxygen Wingstay-L, an active ion radical trapping agent and a methylene di-sulfo ester compound are compounded according to the proportion to form a complex antioxidant, the complex antioxidant, isotridecyl alcohol polyoxyethylene ether or nonyl phenol polyoxyethylene ether and a dilution dispersing agent are mixed and stirred through a high speed shearing machine at the heating condition of 80-120 DEG C to form a homogeneous mixed liquid, and quantitative deionized water and an anionic surface active agent are added to continue to perform high speed shearing and stirring so as to obtain the antioxidant product having a water-soluble particle emulsion state, namely the emulsion antioxidant product.

Description

technical field [0001] The invention belongs to the technical field of preparation of synthetic material antioxidant products, and in particular relates to a preparation method of a novel emulsion antioxidant product used in the production of ABS latex by an emulsion graft polymerization process. Background technique [0002] The emulsion graft polymerization process is used to produce ABS latex. The polymerization process is to add emulsifier, water, polybutadiene latex, acrylonitrile, styrene raw material monomer, initiator and other additives into the polymerization tank, and stir to form a microemulsion solution. The polymerization reaction is completed at a certain temperature. Then add terminator, antioxidant. The use of antioxidants is based on the principle that they can be uniformly dispersed in ABS latex. After the latex is coagulated and dehydrated, ABS grafted powder is obtained, and antioxidants are evenly dispersed in it. The anti-aging performance of ABS graf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/372C08K5/134C08K5/13C08L55/02
Inventor 杜飞郭澄徐婷婷范延超
Owner 浩瀚化学有限责任公司
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