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Butylbenzene emulsion and its preparing method and application

A styrene-butadiene emulsion and emulsifier technology, which is applied in textiles and papermaking, coatings, paper coatings, etc., can solve problems such as poor adhesion between substrates, poor water resistance of emulsion film formation, and insufficient adhesion , to improve the effect of water resistance

Active Publication Date: 2007-11-28
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After the emulsion film is formed, common emulsifiers are difficult to be compatible with the polymer body, and easily migrate to the surface of the film or the interface connected with the substrate, making the water resistance of the film worse, and the gap between the film and the substrate poor adhesion
For example, in Chinese patent CN1075818C, the amount of anionic and nonionic compound emulsifier added accounts for 0.3wt% to 1.5wt% of the monomer weight. The styrene-butadiene latex prepared by this method has high stability, but its emulsion film-forming water resistance, Insufficient adhesion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In the 1000ml pressurized reactor, adding 1 gram of weight concentration is 50% allyl polyoxyethylene ether ammonium sulfate (Rhodapex CL910 of Rhodia Company) aqueous solution, 5 grams of potassium persulfate, 344.5 grams of distilled water, completely dissolved into an aqueous solution . Then add 12.5 grams of acrylic acid, 25 grams of butadiene, 197 grams of styrene, and 2.5 grams of n-dodecanethiol.

[0026] Stir and heat under the condition of 0.6 MPa, the heating temperature is 40° C., and the time is 10 hours, and the polymerization reaction is carried out. Cool to 25°C and neutralize with 37.5 g of 20% aqueous sodium hydroxide solution. Filter through a 100-mesh sieve to obtain high adhesion and high water resistance styrene-butadiene emulsion, with a solid content of 40.2%, an average particle size of 100nm (measured with a Malven particle size analyzer), and pH=9.8 (measured with a PHS-3C precision pH meter) have to).

Embodiment 2

[0028] Add 6 grams of 50% allyl polyoxyethylene ether ammonium sulfate (Emulsogen APG2019 of Clariant Company of Switzerland) aqueous solution and 6 grams of 50% vinyl polyoxyethylene ether (Emulsogen R208 of Clariant Company of Switzerland) aqueous solution in 1000ml pressurized reactor , 0.3 grams of sodium persulfate, 193.1 grams of distilled water, completely dissolved into an aqueous solution. Then add 1.5 grams of methacrylic acid, 51.3 grams of butadiene, 240 grams of methylstyrene, and 0.3 grams of t-dodecylmercaptan. Stir and heat under the condition of 1.0 MPa, the heating temperature is 90° C., and the time is 3 hours, and the polymerization reaction is carried out. Cool to 25°C and neutralize with 1.5 g of 40% aqueous sodium hydroxide solution. Filter through a 100-mesh sieve to obtain high adhesion and high water resistance styrene-butadiene emulsion, with a solid content of 59.7%, an average particle size of 300nm (measured with a Malven particle size analyzer),...

Embodiment 3

[0030] Add 6 grams of 50% allyl polyoxyethylene ether (Rhodasurf AAE-10 of Rhodia Company) aqueous solution, 3 grams of ammonium persulfate, and 290 grams of distilled water into a 1000 ml pressurized reactor to completely dissolve into an aqueous solution. Then add 4.5 grams of itaconic acid, 270 grams of butadiene, 15 grams of styrene, and 1.5 grams of n-butanethiol. Stir and heat under the condition of 0.8 MPa, the heating temperature is 70° C., and the time is 6 hours, and the polymerization reaction is carried out. Cool to 25°C and neutralize with 10 g of 30% aqueous sodium hydroxide solution. Filter through a 100-mesh sieve to obtain high adhesion and high water resistance styrene-butadiene emulsion, with a solid content of 49.6%, an average particle size of 195nm (measured using a Malven particle size analyzer), and pH=8.1 (measured using a PHS-3C precision pH meter) have to).

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Abstract

The present invention discloses one kind of styrene-butadiene emulsion and its preparation process and application. The preparation process includes the following steps: the free radical emulsion polymerization of water solution of mixture of carboxylic acid monomer, butadiene monomer, styrene monomer, molecular weight regulator, emulsifier and initiator for 3-10 hr; regulating the pH value of the resultant to pH 7-10 and filtering. The styrene-butadiene emulsion has high performance and may be used in building paint and papermaking paint to form coating with high water resistance and high adhesion to the base material.

Description

technical field [0001] The invention relates to a binder, in particular to a styrene-butadiene emulsion and a preparation method thereof. Background technique [0002] Styrene-butadiene emulsion is widely used in paper coating and bonding of architectural coatings. During the application process, the performance requirements of the emulsion are getting higher and higher. With the improvement and development of emulsion application technology, the emulsion is required to have good process applicability, among which the water resistance and adhesion of emulsion film formation are important properties. [0003] At present, commercial styrene-butadiene emulsions are all non-reactive surfactants as emulsifiers, including anionic surfactants and nonionic surfactants. [0004] After the emulsion film is formed, common emulsifiers are difficult to be compatible with the polymer body, and easily migrate to the surface of the film or the interface connected with the substrate, making...

Claims

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Application Information

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IPC IPC(8): C08F236/06C08F2/22C09D147/00D21H19/20D21H19/58C08F212/08C08F220/04
Inventor 施晓旦王养臣尹东华
Owner SHANGHAI DONGSHENG NEW MATERIALS
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