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Acrylate anti-doodling emulsion prepared from organosilicon-based RAFT reagent and preparation method of acrylate anti-doodling emulsion

A technology of methyl methacrylate and hydroxypropyl methacrylate, which is applied in the preparation of acrylate anti-graffiti emulsion and its preparation field with silicone-based RAFT reagents, can solve the problems of difficult polymerization of silicone monomers, high cost of reactive silicone oil, Volatile organic compound pollution and other problems, to achieve the effect of simple preparation method, avoid the reduction of film-forming performance of emulsion, and the production process is environmentally friendly

Pending Publication Date: 2022-04-19
NANJING FORESTRY UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of organosilicon-based RAFT reagent to prepare acrylate anti-graffiti emulsion and preparation method thereof, aim to solve the problem of organosilicon monomer usually occurring in the preparation process of conventional organosilicon-modified acrylate anti-graffiti emulsion Polymerization, high cost of reactive silicone oil, low amount of silicone introduction, volatile organic pollution and many other problems provide a more effective preparation method for the preparation of silicone-modified acrylate anti-graffiti emulsions with silicone-based RAFT reagents

Method used

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  • Acrylate anti-doodling emulsion prepared from organosilicon-based RAFT reagent and preparation method of acrylate anti-doodling emulsion
  • Acrylate anti-doodling emulsion prepared from organosilicon-based RAFT reagent and preparation method of acrylate anti-doodling emulsion
  • Acrylate anti-doodling emulsion prepared from organosilicon-based RAFT reagent and preparation method of acrylate anti-doodling emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Add 3.75g of silicone-based RAFT reagent, 2.6g of methyl methacrylate, 1.9g of hydroxypropyl methacrylate, 1.9g of acrylic acid, 3.6g of hydroxyethyl acrylate, and 0.2g of azobisisobutyronitrile into the reaction kettle to initiate agent, 15g of isopropanol solvent, reacted at 75°C and 300rpm for 10 hours, cooled to below 50°C, neutralized with 2.5g of dimethylethanolamine, and distilled off the low boilers under reduced pressure to obtain silicone-containing acrylic acid Ester polymer emulsifier. Add 65g of ionized water to the acrylate polymer emulsifier reaction kettle containing silicone to dissolve, add dropwise 8.3g of methyl methacrylate, 5.7g of hydroxypropyl methacrylate, 13.07g of isobornyl methacrylate, 11.05g of Hydroxyethyl acrylate, 2.7g styrene, 8.25g butyl acrylate, and 0.34g potassium persulfate initiator (dissolved in 28g deionized water) were added dropwise at the same time, and the polymerization reaction was carried out at 82°C and 400rpm for 5 hour...

Embodiment 2

[0074] Add 4.74g silicone-based RAFT reagent, 2.7g methyl methacrylate, 1.89g hydroxypropyl methacrylate, 1.8g acrylic acid, 3.65g hydroxyethyl acrylate, 0.2g azobisisobutyronitrile to the reaction kettle to initiate agent, 16g of isopropanol solvent, reacted at 75°C and 300rpm for 10 hours, cooled to below 50°C, neutralized with 2.5g of dimethylethanolamine, and distilled off the low boilers under reduced pressure to obtain silicone-containing acrylic acid Ester polymer emulsifier. Add 64g of ionized water to the acrylate polymer emulsifier reaction kettle containing silicone to dissolve, add dropwise 8.5g of methyl methacrylate, 5.7g of hydroxypropyl methacrylate, 13.07g of isobornyl methacrylate, 11.05g of Hydroxyethyl acrylate, 2.7g styrene, 8.25g butyl acrylate, and 0.34g potassium persulfate initiator (dissolved in 28g deionized water) were added dropwise at the same time, and the polymerization reaction was carried out at 82°C and 400rpm for 5 hours. After 60 minutes, ...

Embodiment 3

[0076] Add 5.92g of silicone-based RAFT reagent, 2.8g of methyl methacrylate, 1.88g of hydroxypropyl methacrylate, 1.7g of acrylic acid, 3.7g of hydroxyethyl acrylate, and 0.2g of azobisisobutyronitrile into the reaction kettle to initiate agent, 16g of butyl acetate solvent, reacted at 75°C and 300rpm for 10 hours, cooled to below 50°C, neutralized with 2.8g of dimethylethanolamine, and distilled off the low boilers under reduced pressure to obtain silicone-containing acrylic acid Ester polymer emulsifier. Add 65g of ionized water to the acrylate polymer emulsifier reaction kettle containing silicone to dissolve, add dropwise 8.2g of methyl methacrylate, 5.7g of hydroxypropyl methacrylate, 13.05g of isobornyl methacrylate, 11.05g of Hydroxyethyl acrylate, 2.7g styrene, 8.25g butyl acrylate, and 0.34g potassium persulfate initiator (dissolved in 28g deionized water) were added dropwise at the same time, and the polymerization reaction was carried out at 82°C and 400rpm for 5 h...

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Abstract

The preparation method comprises the following steps: by taking the organic silicon-based RAFT reagent, methyl methacrylate, hydroxypropyl methacrylate, acrylic acid and hydroxyethyl acrylate as raw materials and azodiisobutyronitrile as an initiator, reacting at the temperature of 60-90 DEG C for 1-2 hours at the temperature of 60-90 DEG C to obtain the acrylic ester anti-doodling emulsion. Carrying out RAFT (Reversible Addition-Fragmentation Chain Transfer) polymerization to prepare an acrylate polymer emulsifier containing organic silicon; the organosilicon modified acrylate anti-doodling emulsion is prepared through RAFT (reversible addition-fragmentation chain transfer) polymerization by taking an organosilicon-containing acrylate polymer emulsifier, methyl methacrylate, hydroxypropyl methacrylate, isobornyl methacrylate, hydroxyethyl acrylate, styrene and butyl acrylate as raw materials and taking persulfate as an initiator. The anti-doodling emulsion prepared by the invention not only has extremely strong adhesive force, better scrub resistance and ethanol resistance, but also has excellent storage stability, weather resistance and chemical resistance, and can be widely applied to the fields of coatings, inks, adhesives and the like.

Description

technical field [0001] The invention relates to an organosilicon-based RAFT reagent for preparing an acrylate anti-graffiti emulsion and a preparation method thereof, belonging to the field of fine chemical chemicals. Background technique [0002] In recent years, with the advancement of anti-graffiti emulsion preparation technology, silicone-modified acrylate anti-graffiti emulsion has been developed. Silicone-modified acrylate anti-graffiti emulsion not only has excellent film-forming properties, but also can improve the water resistance, stain resistance and scrub resistance of the coating film, so it has attracted the attention of the industry. [0003] At present, the silicone-modified acrylate anti-graffiti emulsion produced by conventional domestic preparation methods is mainly prepared by adding suitable additives to silicone monomers and acrylic monomers containing unsaturated bonds, and then through the core-shell coating polymerization process. , the emulsion has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08F220/14C08F220/20C08F220/18C08F212/08
CPCC08F265/06C08F220/14C08F220/20C08F220/1811C08F212/08C08F220/1804
Inventor 季永新余奇伟吕正伟陈永康
Owner NANJING FORESTRY UNIV