Method for preparing emulsion composite antioxidant
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A composite antioxidant and emulsion-type technology, which is applied in the field of preparation of emulsion-type composite antioxidants, can solve the problems of increased viscosity, unfavorable transportation and dispersion, etc.
Inactive Publication Date: 2010-08-18
天津力生化工有限公司
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Problems solved by technology
The antioxidant emulsion synthesized by this method, when the solid content increases to more than 50%, the viscosity increases, which is not conducive to transportation and dispersion
Method used
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Embodiment 1
[0017] In a 500ml Erlenmeyer flask, add 100g DLTDP, 12.5g Wingstay.L, 37.5g 1076, 4.5g stearic acid, 0.75g n-butanol, heat under stirring at 350 rpm, heat to above 70°C, add 2.25g KOH, control the pH value at 7-8, add 45g of deionized water, adjust the stirring speed to 200 rpm, add 95g of deionized water to control the solid content at 53%, then cool down to room temperature, and leave material.
[0018] Detection: Viscosity = 1100mp a .s(BROOKFIELD PV-11+Pro).
Embodiment 2
[0020] In a 500ml Erlenmeyer flask, add 100g DLTDP, 37.5g Wingstay.L, 12.5g 1076, 12g stearic acid, 1.5g stearyl alcohol, heat at 400 rev / min, heat to above 90°C, add 4.5 g KOH, control the pH value at 10-11, then add 45g of deionized water, adjust the stirring speed to 180 rpm, add 88g of deionized water to control the solid content at 56%, then drop to room temperature, and discharge .
[0021] Detection: Viscosity = 1200mp a .s(BROOKFIELD PV-11+Pro).
Embodiment 3
[0023] In a 500ml Erlenmeyer flask, add 100g DLTDP, 25g Wingstay.L, 25g 1076, 7.5g stearic acid, 1.5g isopropanol, heat under stirring at 350 rpm, heat to above 80°C, add 3g KOH , control the pH value at 9 to 10, add 45g of deionized water, adjust the stirring speed to 200 rpm, add 93g of deionized water, control the solid content at 54%, then drop to room temperature, and discharge.
[0024] Detection: Viscosity = 1000mp a .s(BROOKFIELD PV-11+Pro).
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Abstract
The invention relates to a method for preparing an emulsion composite antioxidant, which comprises the following steps: feeding materials in a mass part ratio that DLTDP:(Wingstay.L:1076) is equal to 4:2, wherein Wingstay.L:1076 is equal to 0.5-1.5:1.5-0.5, based on the total weight of a raw material A, namely 100 percent, adding 3 to 8 percent of stearic acid and 0.5 to 1.5 percent of C4 to C18 straight chain alcohol or branched chain alcohol or the mixture of the straight chain alcohol and the branched chain alcohol, heating to perform reaction with stirring at the speed of 300 to 400rpm, adding KOH when the temperature reaches 70 to 90 DEG C, and controlling the pH value to be between 7 and 11; adding deionized water to make the solid content of the whole system be 53 to 56 percent, adding 30 percent of deionized water, adjusting the stirring speed to be between 180 and 250rpm, adding the rest of deionized water, and naturally cooling to room temperature. By adopting the method, an aqueous emulsion of the composite antioxidant of which the solid content is 53 to 56 percent, the pH is 7 to 11 and the viscosity is less than or equal to 1,200mpa.s (BROOKFIELD PV-11+Pro) is synthesized, and has high oxidation resistance, low viscosity and good dispersity.
Description
technical field [0001] The invention belongs to the technical field of antioxidants, in particular to a preparation method of an emulsion type composite antioxidant. Background technique [0002] At this stage, the antioxidants used in rubber, latex, plastics, ABS and other industries at home and abroad are basically monophenolic, with general anti-aging effects, and most of them are relatively simple solid antioxidant powders. The disadvantages are that the usage is single, the anti-aging is poor, and the dosage is not accurate, and the dispersibility is poor, which leads to local yellowing. Now the development trend in foreign countries is the main anti-aging agent, and the water-based anti-aging agent emulsion is made with the auxiliary anti-aging agent, that is, the auxiliary anti-oxidant of polymerized phenolic antioxidant and thioester is used to make a new type of high-efficiency anti-aging agent through advanced compound emulsification technology. Antioxidant, which...
Claims
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Application Information
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