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Reaction type greasy base degradable surfactant as well as synthetic method and application thereof

A technology of surfactant and synthesis method, which is applied in the direction of fatty acid production, fatty acid chemical modification, fatty acid preparation/refining, etc., can solve the problems of unsuitable industrial application and high cost, and achieves industrial promotion of emulsion polymerization, low price, and easy availability. Effect

Active Publication Date: 2013-12-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most reactive surfactants are not suitable for industrial applications due to their high cost.

Method used

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  • Reaction type greasy base degradable surfactant as well as synthetic method and application thereof
  • Reaction type greasy base degradable surfactant as well as synthetic method and application thereof
  • Reaction type greasy base degradable surfactant as well as synthetic method and application thereof

Examples

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preparation example Construction

[0024] A kind of synthetic method of grease-based degradable surfactant provided by the invention comprises the following steps:

[0025] 1. Hydrolyzing oil: Mix 50 parts by mass of an acid catalyst with a mass concentration of 15-35% and 30-70 parts by mass of ethanol evenly, add it to the reactor, heat up to 50-100°C, and stir for 0.5-12 hours Add 20-60 parts of fats and oils to the reactor dropwise, keep warm for 0.5-24 hours, cool to room temperature, let stand to separate layers, take the upper layer and wash it with water for 5 times to obtain fatty acid;

[0026] 2. Esterification of fatty acid and polyether: dissolve 30-100 parts by mass of the fatty acid obtained in step 1 and the polyether in equal molar parts to the fatty acid in 100 parts by mass of toluene, add it to the reactor, and drop in 0.01-0.5 parts by mass of acid Catalyst, heat up to 50-150°C while stirring, stir and react for 0.5-24 hours, after the reaction is completed, vacuumize toluene at 50-100°C, a...

Embodiment 1

[0041] Preparation of oil-based degradable surfactant

[0042] 1. Hydrolyzing oil: Mix 50 grams of 15% sulfuric acid and 30 grams of ethanol evenly, add it into the reactor, raise the temperature to 60°C, and drop 20 grams of soybean oil into the reactor within 1 hour while stirring , heat preservation reaction for 2 hours, then cool to room temperature, after the reaction is completed, let stand to separate layers, take the supernatant and wash 5 times with water to obtain fatty acid;

[0043] 2. Esterification of fatty acid and polyether: dissolve 30 grams of fatty acid obtained in step 1 and polyether with an equal molar fraction of fatty acid in 100 grams of toluene, add to the reactor, add 0.01 gram of concentrated sulfuric acid dropwise, and heat up to 60°C, stirred for 1 hour, after the reaction was completed, vacuumed at 60°C to remove toluene, and then added dropwise NaHCO with a mass fraction of 30%. 3 aqueous solution until no more bubbles are formed. Then add 60 ...

Embodiment 2

[0048] Preparation of oil-based degradable surfactant:

[0049] 1. Hydrolyzed oil: Mix 50 grams of hydrochloric acid with a mass concentration of 20% and 50 grams of ethanol evenly, add it into the reactor, raise the temperature to 70°C, and add 50 parts of lard dropwise to the reactor within 4 hours while stirring , heat preservation reaction for 2 hours, then cool to room temperature, after the reaction is completed, let stand to separate layers, take the upper layer and wash with water 5 times to obtain fatty acid;

[0050] 2. Esterification of fatty acid and polyether: dissolve 30 grams of fatty acid obtained in step 1 and polyether in equal molar fractions with fatty acid in 100 parts of toluene, add to the reactor, add 0.1 gram of concentrated sulfuric acid dropwise, and heat up to 90°C, stirred and reacted for 2 hours, after the reaction was completed, vacuumed at 60°C to remove toluene, and then added dropwise NaHCO with a mass fraction of 30% 3 aqueous solution until...

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Abstract

The invention discloses a reaction type greasy base degradable surfactant as well as a synthetic method and application thereof. Polyether blocks and unsaturated double bonds are introduced in grease, so that the prepared degradable surfactant can be used for conventional emulsion polymerization and miniemulsion polymerization, as a result, stable polymer latex can be obtained. According to the invention, the price of production raw material is low, the preparation process is simple and feasible and environment-friendly, and a new approach is provided for the preparation of biodegradable latex.

Description

technical field [0001] The invention relates to a surfactant, in particular to a reactive oil-based degradable surfactant and its synthesis method and application. Background technique [0002] During the preparation of polymer latex, it is usually necessary to use surfactants so that the latex particles can be stably dispersed in water. However, our recent studies have shown that even a small amount of surfactant in latex will have a great impact on the polymer film formed by latex. Due to the presence of surfactant, the polymer film is easy to absorb moisture and become white. At the same time, the surface The active agent migrates with the volatilization of water, and is enriched on the surface of the polymer film, which makes the performance of the polymer film drop sharply. For example, sodium lauryl sulfate with a monomer content of 4% is used in the emulsion polymerization of butyl acrylate. After volatilization, the concentration of sodium lauryl sulfate on the surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48C08F290/06C11C1/04C11C3/00
Inventor 张继林史蒂芬.J.史文森王文俊
Owner ZHEJIANG UNIV
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