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Prepn process of modified styrene-acrylic emulsion

A styrene-acrylic emulsion and modification technology, which is applied in the field of preparation of modified styrene-acrylic emulsion, can solve the problems of weather resistance, stain resistance and unsatisfactory coating effect, and achieve good compatibility and good adhesion of general additives , easy-to-control effects

Inactive Publication Date: 2004-04-07
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some achievements have been made in the research in this field. For example, a kind of organosilicon modified styrene-acrylic emulsion was disclosed in the 3rd issue of "Shanghai Coatings" in 2001; the publication date is December 4, 2002, and the publication number is CN1382738A The patent application disclosed a styrene-acrylic emulsion modified by a silane coupling agent and its manufacturing method and application. Although these processes and methods have improved some properties of the styrene-acrylic emulsion, they still have weather resistance, stain resistance and coating properties. Defects of unsatisfactory film effect

Method used

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  • Prepn process of modified styrene-acrylic emulsion

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Embodiment 1

[0026] name

[0027] As shown in the process flow chart, first dissolve the emulsifier sodium dodecyl sulfate (SDS) in water, mix OP-10 and sodium dodecyl sulfate aqueous solution with styrene (St), butyl acrylate (BA), acrylic acid (AA) mixed and stirred vigorously for 0.5 hours to obtain a stable and uniform pre-emulsion A; ammonium persulfate (APS) was dissolved in water to form solution B; vinyltriethoxysilane (T) and octamethylcyclotetrasilane Oxane (D 4 ), Vinylcyclotetrasiloxane (D 4 V ), propylene trifluoroacetate (F 3), dodecylbenzenesulfonic acid were stirred and mixed at 45°C to obtain solution C, and sodium bicarbonate was dissolved in water to obtain solution D. Take 1 / 3 of each of pre-emulsion A and solution B, deionized water, and solution D into the reactor, stir to 74-80°C and react for about 0.5 hours, start to drop 2 / 3 of the remaining solution B, the remaining pre-emulsion 1 / 2 of liquid A, drop in about 3 hours (control pre-emulsion A to dro...

Embodiment 2

[0029] name

[0030] First, the emulsifier sodium dodecyl sulfate (SDS) was dissolved in water, and OP-10 and sodium dodecyl sulfate aqueous solution were mixed with styrene (St), methyl methacrylate (MMA) and butyl acrylate (BA ), acrylic acid (AA) were mixed and stirred vigorously for 0.5 hours to obtain stable and uniform pre-emulsions A1 and A2; ammonium persulfate (APS) was dissolved in water to form solution B; Methylcyclotetrasiloxane (D 4 ), Vinylcyclotetrasiloxane (D 4 V ), trifluoroacetylacrylamide (F A ), dodecylbenzenesulfonic acid was stirred and mixed at 45°C to obtain solution C, and sodium bicarbonate was dissolved in water to obtain solution D. Take 1 / 4 of pre-emulsion A1, 1 / 3 of pre-emulsion A2 and solution B1 / 3. Add deionized water and solution D into the reaction kettle, stir to 74°C and react for 0.5 hours, start to drop 1 / 3 of solution B, 1 / 4 of pre-emulsion A1, 1 / 3 of pre-emulsion A2, 3 The dripping is finished in about 1 hour (control the...

Embodiment 3

[0032] name

[0033] Dissolve the emulsifier sodium dodecyl sulfate (SDS) in water, mix OP-10 and sodium dodecyl sulfate aqueous solution with styrene (St) and butyl acrylate (BA), and stir vigorously for 0.5 hours to obtain a stable and uniform The pre-emulsion A; ammonium persulfate (APS) dissolved in water to make solution B; chloropropyltriethoxysilane (ClC 3 h 6 Si(OE) 3 ), octamethylcyclotetrasiloxane (D 4 ), Vinylcyclotetrasiloxane (D 4 V ), isofluoroacetyl acrylate (YF A ), dodecylbenzenesulfonic acid were stirred and mixed at about 45°C to obtain solution C, and sodium bicarbonate was dissolved in water to obtain solution D. Take 1 / 3 each of pre-emulsion A and solution B, deionized water, and solution D into a four-neck flask, stir until 74-80°C and react for about 0.5 hours, start to drop 2 / 3 of the remaining solution B, the remaining pre-emulsion Emulsion A, drop in about 3 hours (control pre-emulsion A to drop first). The temperature was raised to ...

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Abstract

The modified styrene-acrylic emulsion is prepared with styrene, propyl acrylate and acrylic acid as monomers for polymerization, organic fluoride as modifier, composite emulsifier, thermal decomposed initiator and silane crosslinking agent, dodecyl benzene sulfonic acid as catalyst and through core-shell polymerization process. The technological process is simple and easy to control, and has stable polymerizing system. The organosilicon modified styerne-acrylic emulsion may be used widely as base material in inner and outer wall paint with excellent adhesivity, waterproof perfomance, storage stability, good construction performance, good weather resistance, good antifouling performance and long service life.

Description

technical field [0001] The invention relates to a method for preparing a base material of architectural paint, in particular to a method for preparing a modified styrene-acrylic emulsion. Background technique [0002] With the continuous development of society and the continuous improvement of people's living standards, housing consumption has become a hot spot for urban residents. The country has made it clear that housing construction will become a new economic growth point and an important industry in the national economy. There will also be great demand for architectural coatings matching residential construction. The output and annual consumption of architectural coatings in my country will reach more than 2 million tons in recent years. Architectural coatings are also gradually developing in the direction of weather resistance, stain resistance, and low toxicity. To improve the quality and grade of building materials, the key is to synthesize hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/22C08F212/08C08F220/10
Inventor 李忠铭杜金萍路平万昆王敏娟刘辉熊学杰胡元生陈春华范剑虹王晋黄
Owner JIANGHAN UNIVERSITY
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