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Method for preparing earth site surface layer protection material of organosilicon modified acrylic ester microemulsion

A technology of acrylate and butyl acrylate, which is applied in the field of silicone-modified acrylate microemulsion, and can solve problems such as the absence of silicone-modified acrylate microemulsion

Inactive Publication Date: 2008-10-22
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] After searching, at present, acrylic resin system and silicone-modified acrylic resin emulsion are mostly researched at home and abroad, but no patent application or literature report of silicone-modified acrylate microemulsion as room temperature reinforcement material for earthen sites has been found.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Butyl acrylate, styrene and silane coupling agent KH570 are used as ternary comonomers, and the mass ratio is 30:70:10. First, 80% of the mass fraction of deionized water and 10% of the mass fraction of the composite surface active Agent SDS-OP-10 and co-surfactant n-amyl alcohol are mixed uniformly, then styrene and butyl acrylate accounting for 20%-50% of the total amount of monomers are added, and a transparent microemulsion is formed after uniform stirring for 0.5-1h. The above-mentioned microemulsion is added in the three-port reactor, and the redox initiator ammonium persulfate and sodium bisulfite aqueous solution with a concentration of 20% are added, and the temperature is slowly raised to 50° C. to carry out the microemulsion polymerization reaction (when the system appears blue fluorescence or The temperature rise indicates that the reaction has started); after about 1-1.5 hours of reaction, slowly add the remaining butyl acrylate and styrene dropwise, when th...

Embodiment 2

[0016]Butyl acrylate, styrene and silane coupling agent KH570 are used as ternary comonomers in a mass ratio of 50:50:8. First, 80% of the mass fraction of deionized water and 10% of the mass fraction of the composite surface active The agent Span80-Tween80 and the co-surfactant n-amyl alcohol are mixed evenly, and then styrene and butyl acrylate accounting for 20%-50% of the total amount of monomers are added, and a transparent microemulsion is formed after uniform stirring for 0.5-1h. The above-mentioned microemulsion is added in the three-port reactor, and 0.05% initiator azobisisobutyronitrile (AIBN) is added, and the temperature is slowly raised to 65° C. Start to carry out); react about 1-1.5h, slowly drop the remaining butyl acrylate and styrene, when the conversion rate of butyl acrylate and styrene is about 90%, add silane coupling agent KH570 monomer (one-time addition or continuous dropwise), continue to react for 1-1.5h, after the reaction is over, cool the system ...

Embodiment 3

[0018] Butyl acrylate, styrene and silane coupling agent KH570 are used as ternary comonomers, and the mass ratio is 30:70:12. First, 80% of the mass fraction of deionized water and 12% of the mass fraction of the composite surface active The agent Span80-Tween80 and the co-surfactant n-amyl alcohol are mixed evenly, and then styrene and butyl acrylate accounting for 20%-50% of the total amount of monomers are added, and a transparent microemulsion is formed after uniform stirring for 0.5-1h. The above-mentioned microemulsion is added in the three-port reactor, and 0.08% initiator benzoyl peroxide (BPO) is added, and the temperature is slowly raised to 65°C to carry out the microemulsion polymerization reaction (when the system appears blue fluorescence or the temperature rises, it indicates that the reaction starts carry out); react for about 1-1.5h, slowly drop the remaining butyl acrylate and styrene, when the conversion rate of butyl acrylate and styrene is about 90%, add s...

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Abstract

The invention provides an organic silicon modifying acrylic ester microemulsion which is made by taking butyl acrylate, styrene and silane coupling agent KH570 as basic raw materials, taking a nonionic-negative ion surface active agent or a nonionic-nonionic surface active agent as a composite surface active agent, taking n-amyl alcohol as an auxiliary surface active agent, taking deionized water as disperse phase, taking azo type and peroxide type or sulphate as evocating agents, and adopting the microemulsion free radical copolymerization. The organic silicon modifying acrylic ester microemulsion is semitransparent or transparent, has good anti- electrolyte stability, centrifugal stability and distilling stability, reinforces the clay in wet environment at a room temperature, has little influence on the surface appearance on the clay, has the advantages of high permeating speed and controllable permeating depth, thereby being a novel room temperature reinforcing and protective material for the clay surface in the wet environment.

Description

1. Technical field [0001] The present invention relates to using nonionic-anionic surfactant or nonionic-nonionic surfactant as composite surfactant, n-amyl alcohol as co-surfactant, deionized water as dispersed phase, azobisisobutyronitrile or peroxide Using ammonium sulfate as an initiator, a silicone-modified acrylate microemulsion was prepared by microemulsion radical copolymerization. The organosilicon-modified acrylate microemulsion prepared by the invention is suitable for room temperature reinforcement and protection of the surface layer of earthen ruins in a humid environment. 2. Technical background [0002] In 2001, during infrastructure construction in Jinsha Village, Supo Township, Qingyang District, Chengdu, a large site was discovered, and the Chengdu Institute of Cultural Relics and Archaeology immediately carried out a rescue excavation of the site. At present, the proven ruins cover an area of ​​nearly 3 square kilometers. More than 2,000 pieces of precio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F2/44C08F2/26C08F2/30C08K5/54C09D133/08C08F220/16
Inventor 万涛林金辉汪灵肖维兵李小洁
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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