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Method for preparing acrylate water-based dispersion by continuously dripping under low temperature condition

A water-based dispersion and acrylate technology, applied in applications, coatings, inks, etc., can solve problems such as long holding time, high reaction temperature, and low neutralization degree of products

Active Publication Date: 2012-01-18
河南索顿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the existing technology for preparing water-based acrylate are long holding time, high reaction temperature, and low neutralization degree of the product

Method used

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  • Method for preparing acrylate water-based dispersion by continuously dripping under low temperature condition
  • Method for preparing acrylate water-based dispersion by continuously dripping under low temperature condition
  • Method for preparing acrylate water-based dispersion by continuously dripping under low temperature condition

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preparation example Construction

[0044] The acrylate aqueous dispersion obtained by the preparation method of the acrylate aqueous dispersion of the present invention has the following advantages:

[0045] 1. The product has good storage stability. Through the appropriate formula and process conditions described above, the obtained product has very good storage stability, and the performance does not change after being placed at room temperature for more than one year.

[0046] 2. The production stability is good. The acrylate water-based dispersion is prepared by continuous dropwise addition at low temperature, which makes the product production reproducible and will not cause changes in product performance due to excessive temperature or too much one-time feeding.

[0047] 3. The product is green and environmentally friendly. The organic solvent content in the product obtained by the adopted formula design is less than 8%, which meets the requirements of the international green and environmental protection w...

Embodiment 1

[0065] 500g of ethanol, 5g of n-dodecyl mercaptan and 30g of ethylene glycol butyl ether were placed in the reactor for mixing and stirring, and the temperature was controlled at 80°C.

[0066] Add 200 grams of methyl methacrylate, 100 grams of butyl acrylate, 50 grams of hydroxypropyl methacrylate, 10 grams of acrylic acid and 5 grams of azobisisobutyronitrile dropwise at a constant speed, and the reaction time is 1 hour. The internal temperature is controlled at 80° C., and the mixture of pentyl acrylate, propyl methacrylate and azobisisobutyronitrile is added dropwise within the reaction time. Keep warm for 2 hours, the temperature is controlled at 80°C, add 1g of azobisisobutyronitrile and 1g of n-dodecyl mercaptan during the heat preservation, so that the unreacted monomers can be completely reacted, and at the same time, some molecules with too high molecular weight can be reduced. molecular weight.

[0067] Add the mixture of pentyl acrylate, propyl methacrylate and az...

Embodiment 2

[0076] Put 500g of acetone, 6g of n-dodecyl mercaptan and 40g of ethylene glycol butyl ether into the reactor, mix and stir, and control the temperature at 50°C.

[0077] The mixture of 200 grams of hexyl methacrylate, 100 grams of butyl acrylate, 50 grams of hydroxyethyl methacrylate, 10 grams of methacrylic acid and 5 grams of azobisisobutyronitrile was added dropwise at a uniform speed, and the reaction time was 3 hours. During the reaction time, the temperature was controlled at 50° C., and the mixture of ethyl methacrylate, ethyl acrylate and azobisisobutyronitrile was added dropwise during the reaction time. Keep warm for 2 hours, the temperature is controlled at 50°C, add 2g of azobisisobutyronitrile and 2g of n-dodecyl mercaptan during the heat preservation, so that the unreacted monomers can be completely reacted, and at the same time, some molecules with too high molecular weight can be reduced. molecular weight.

[0078] Add the mixture of ethyl methacrylate, ethyl...

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Abstract

The invention relates to a method for preparing acrylate water-based dispersion, in particular to a method for preparing acrylate water-based dispersion by adopting a continuous dripping manner under low temperature condition. The method provided by the invention has good production stability, the obtained acrylate water-based dispersion product has good storage stability and is green, solid content can reach 30-40%, appearance is oyster white and is fine and smooth, no particle or floccule is contained, and liquidity is good. Hardness is more than H (adopting a pencil hardness method); adhesion is lower than one grade (determined by adopting a griding method), and flexibility and shock resistance are high; besides, water resistance, acid resistance, alkali resistance and solvent resistance are high.

Description

technical field [0001] The invention relates to a method for an aqueous acrylate dispersion, in particular to a method for preparing an aqueous acrylate dispersion by continuous dropwise addition at low temperature. Background technique [0002] Water-based resin is the film-forming substance of water-based paint for environmental protection products. The performance of water-based resin determines the product performance of water-based paint to a large extent. Therefore, the research and development of high-quality water-based resin is currently a hot spot. High-quality water-based resins are mainly reflected in gloss, hardness, water resistance, adhesion, flexibility, impact resistance, acid and alkali resistance, salt spray resistance, solvent wiping resistance, appearance, storage period, construction time limit and so on. [0003] There are many problems with the current water-based resins in the Chinese market, such as appearance, hardness, adhesion, water resistance, ...

Claims

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Application Information

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IPC IPC(8): C08J3/03C08L33/12C08L33/08C08L33/14C08L33/02C09D133/12C09D11/00
Inventor 陶栋梁
Owner 河南索顿新材料有限公司
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