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Aqueous concoction, aqueous polymer emulsion prepared from same and application thereof

A formulation, water-based technology that can be used in coatings and other directions to solve problems such as performance impairment, poor adhesion to plastic substrates, and insufficient hardness

Active Publication Date: 2010-09-22
ETERNAL CHEM (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many researchers of water-based coatings. However, while improving the performance of a certain aspect, it also leads to the loss of other aspects of performance.
For example, Chinese Patent No. CN01107019.6 discloses a polymer nanometer water-dispersed resin for plastic coating, although it penetrates into the surface layer of the plastic substrate during the film-forming process by the nano-size effect, thus improving the contact with the substrate. Adhesion to the material, but the hardness is not enough (only ≥ HB)
On the other hand, Chinese Patent No. CN01108770.6 discloses a polyurethane / polyacrylate composite nano-water dispersion, although its coating film hardness is sufficient (≥H), but only suitable for glass or wood substrates, for plastic substrates poor material adhesion

Method used

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  • Aqueous concoction, aqueous polymer emulsion prepared from same and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Example 1 (E1):

[0073] Add 280g of water, 1.4g of AE-300, 5.2g of M-10S into the reaction flask. 297.89g methyl methacrylate, 72.75g isobornyl methacrylate, 46.46g butyl acrylate, 48.5g hydroxyethyl methacrylate, 9.7g-1,6 hexanediol diacrylate (HDDA), 9.7 g methacrylic acid, 11.05 g AE-300, 8.08 g M-10S and 158.87 g water were stirred to make a pre-emulsion. The temperature of the reaction bottle was raised to 80-85°C, and 33.15g of pre-emulsion and 6g of ammonium persulfate aqueous solution (6wt% aq) were added to control the internal temperature to not exceed 85°C. When the temperature starts to drop to the set temperature (70-85°C), start to drop the remaining pre-emulsion and 34g ammonium persulfate aqueous solution synchronously for 1-6 hours, and control the internal temperature at the set temperature throughout the process. After the dropwise addition is completed, keep the temperature at 80-85°C for 1-4 hours. Cool down to below 40°C, add ammonia water to n...

Embodiment 2

[0074] Example 2 (E2):

[0075] Add 280g water, 1.4g EFS-980L 1.0g AE-300, 5.2g UCAN-1 into the reaction flask. 282.0g of isobornyl methacrylate, 15.04g of methyl methacrylate, 72.75g of butyl acrylate, 62.35g of hydroxyethyl methacrylate, 48.5g of 1,6-hexanediol diacrylate (HDDA), 9.7g methacrylic acid, 2.06g EFS-980L, 4.53g AE-300, 15.04g UCAN-1 and 158.87g water were stirred to make pre-emulsion. The temperature of the reaction flask was raised to 80-85°C, and 66.55g of pre-emulsion and 12g of ammonium persulfate aqueous solution (6wt% aq) were added to control the inner temperature not to exceed 85°C. When the temperature starts to drop to the set temperature (70-85°C), start to drop the remaining pre-emulsion and 28g ammonium persulfate aqueous solution synchronously for 1-6 hours, and control the internal temperature at the set temperature throughout the process. After the dropwise addition is completed, keep the temperature at 80-85°C for 1-4 hours. Cool down to belo...

Embodiment 3

[0076] Embodiment 3 (E3):

[0077] 280g water, 7.7g ER-30, 1.67g SR-10, 0.5g sodium bicarbonate were added to the reaction flask. 219.0g methyl methacrylate, 100.0g isobornyl methacrylate, 33.0g butyl acrylate, 40g hydroxyethyl methacrylate, 8.0g methacrylic acid, 15.38g ER-30, 3.33g SR-10 and 252.64g of water was stirred to make a pre-emulsion. The temperature of the reaction bottle was raised to 80-85°C, and 67.12g of pre-emulsion and 7.5g of ammonium persulfate aqueous solution (6.7wt% aq) were added to control the internal temperature to not exceed 85°C. When the temperature begins to drop to the set temperature (referring to 70-85°C), start to add the remaining pre-emulsion and 22.5g of ammonium persulfate aqueous solution synchronously, and the dropping time is 1-6 hours. The whole process controls the internal temperature at the set temperature . After the dropwise addition is completed, keep the temperature at 80-85°C for 1-4 hours. Cool down to below 40°C, add AMP...

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Abstract

The invention provides an aqueous concoction which comprises the following components: (a) isobornyl methacrylate monomer, (b) monomer containing a vinyl unsaturated group, (c) crosslinking monomer, (d) unsaturated organic acid and salt thereof, (e) surface active agent, and (f) aqueous medium. The invention also provides an aqueous polymer emulsion prepared by the polymerization reaction of the aqueous concoction, which can be applied to water paint so as to obtain a paint having high performance and high drying rate. Compared with the traditional solvent-based paint, the water-based paint can reduce the production of organic solvents, thereby better meeting the environment protection requirements.

Description

technical field [0001] The present invention relates to an aqueous formulation and an aqueous polymer emulsion formed therefrom. In particular, the present invention relates to an aqueous polymer emulsion useful for coating the surface of a substrate. Background technique [0002] At present, various electronic or electrical products, such as digital cameras, notebook computers, mobile phones, cosmetics, auto parts, etc., have been widely used in daily life. The casings of such products are mostly made of plastic. Although plastic has the advantages of easy molding, low cost, light weight and non-corrosion, it also has disadvantages such as unsightly, easy to age, poor mechanical properties, poor heat resistance and high water absorption. Therefore, After the shell is machined into shape, it is often necessary to coat its surface with protective and decorative coatings. [0003] In the past, most of the coatings used on plastic substrates were solvent-based coatings. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F2/24C09D133/12C09D133/10
Inventor 黄志荣萧裕霖
Owner ETERNAL CHEM (CHINA) CO LTD
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