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Preparation method for epoxy methacrylate composite emulsion

A technology of epoxy methacrylate and epoxy methacrylate, applied in the direction of coating and the like, can solve the problems of poor compatibility, low grafting rate, difficult emulsification of epoxy resin, etc., so as to improve the poor compatibility, Improve the effect of graft copolymerization and reduce residual amount

Inactive Publication Date: 2014-06-04
NANJING FORESTRY UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a preparation method of epoxy methacrylate composite emulsion, the purpose of which is to solve the problems of poor compatibility, low grafting rate and epoxy methacrylate composite emulsion resin existing in the prior art. It is beneficial to improve the compatibility between epoxy resin and acrylic resin, improve the low grafting rate, and solve the problems of difficult emulsification of epoxy resin.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Stir and mix 375 parts by mass of epoxy resin E-51 and 8 parts by mass of 2,2,6,6-tetramethyl-4-hydroxypiperidine at 58°C for 20 minutes until the temperature of the system rises to 87°C , under the protection of nitrogen, start to drop a mixture of 3 parts by mass of tetrabutylammonium bromide and 80 parts by mass of methacrylic acid, and the dropping time is controlled at 1 hour. When the acid value is less than 4mgKOH / g, the reaction is terminated. , to obtain epoxy methacrylate.

[0014] After the epoxy methacrylate synthesized by the above steps is uniformly mixed with 75 mass parts of butyl acrylate and 24 mass parts of methyl methacrylate, drop by 40 mass parts of CO-436, The DSB of 12 mass parts, the ammonium persulfate of 2 mass parts, the NaHCO of 0.7 mass part The mixed solution of the distilled water of 370 mass parts, dropwise time is controlled at 20 minutes, makes epoxy methacrylate pre-emulsion.

[0015] 225 parts by mass of butyl acrylate, 12 parts by ...

Embodiment 2

[0018] Stir and mix 395 parts by mass of epoxy resin E-51 and 10 parts by mass of 2,2,6,6-tetramethyl-4-hydroxypiperidine at 65°C for 30 minutes, until the temperature of the system rises to 92°C , under the protection of nitrogen, start to drop a mixture of 3.5 parts by mass of tetrabutylammonium bromide and 92 parts by mass of methacrylic acid, and the dropping time is controlled at 1.5 hours. When the acid value is less than 4mgKOH / g, the reaction is terminated , to obtain epoxy methacrylate.

[0019] After the epoxy methacrylate synthesized by the above steps is uniformly mixed with 82 mass parts of butyl acrylate and 28 mass parts of methyl methacrylate, drop by 45 mass parts of CO-436, 15 parts by mass of DSB, 2.3 parts by mass of ammonium persulfate, 0.9 parts by mass of NaHCO 3 And the mixed solution that the distilled water of 390 mass parts forms, dropwise time is controlled at 25 minutes, makes epoxy methacrylate pre-emulsion.

[0020] 228 parts by mass of butyl a...

Embodiment 3

[0023] Stir and mix 380 parts by mass of epoxy resin E-51 and 9 parts by mass of 2,2,6,6-tetramethyl-4-hydroxypiperidine at 60°C for 25 minutes until the temperature of the system rises to 90°C , under the protection of nitrogen, start to drop a mixture of 3.2 parts by mass of tetrabutylammonium bromide and 84 parts by mass of methacrylic acid, and the dropping time is controlled at 1.5 hours. When the acid value is less than 4mgKOH / g, the reaction is terminated , to obtain epoxy methacrylate.

[0024] After the epoxy methacrylate synthesized by the above steps is uniformly mixed with 80 mass parts of butyl acrylate and 26 mass parts of methyl methacrylate, drop by 42 mass parts of CO-436, The DSB of 13 mass parts, the ammonium persulfate of 2.3 mass parts, the NaHCO of 0.8 mass parts The mixed solution that the distilled water of 375 mass parts forms, the dropping time is controlled at 20 minutes, makes epoxy methacrylate pre-emulsion.

[0025]228 parts by mass of butyl acry...

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Abstract

The invention provides a preparation method for epoxy methacrylate composite emulsion. The preparation method comprises the steps of preparing epoxy methacrylate by using epoxy resin E-51 and 2,2,6,6-tetramethyl-4-hydroxyl oxide piperidine as raw materials; preparing epoxy methacrylate pre-emulsion by mixing epoxy methacrylate with butyl acrylate and methyl methacrylate uniformly; then preparing acrylate pre-emulsion by mixing butyl acrylate, methacrylic acid and methyl methacrylate uniformly; finally mixing 60-70% of the prepared acrylate pre-emulsion with NaHCO3, an emulsifier CO-436, ammonium persulfate and distilled water uniformly; dropwise adding a mixed solution composed of ammonium persulfate, distilled water and the residual acrylate pre-emulsion and then dropwise adding the epoxy methacrylate pre-emulsion to obtain the epoxy methacrylate composite emulsion. The method effectively overcomes the problems of poor compatibility between epoxy resin and acrylic resin and difficult emulsification of the epoxy resin, and increases graft copolymerization and grafting ratio between acrylic acid and the epoxy resin.

Description

technical field [0001] The invention relates to a preparation method of epoxy methacrylate, in particular to a preparation method of epoxy methacrylate composite emulsion. Background technique [0002] At present, the performance of water-based coatings prepared from a single resin cannot compete with traditional solvent-based coatings, which limits the popularization and application of water-based coatings. For example, epoxy resin coatings have disadvantages such as toughness, poor weather resistance, and poor storage stability; acrylic resins have disadvantages such as thermal stickiness, cold brittleness, and poor heat resistance. In order to improve the defects of a single resin in use, since the 1980s, people have tried to compound epoxy resin and polyacrylate. [0003] Epoxy resin-polyacrylic acid composite emulsion is a water-based coating with excellent performance, which combines the advantages of epoxy resin and acrylic resin, such as epoxy resin can improve adhe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/32C08F220/18C08F220/14C08F220/06C08F2/26C09D133/14
Inventor 季永新金维平杨亚萍
Owner NANJING FORESTRY UNIV
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