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Water-based strippable coating, preparation method and application

A paint, water-based technology, applied in the field of peelable paint preparation, can solve the problems of non-peelable, VOC reduction, side effects, etc., to achieve good high temperature resistance and acid and alkali resistance, large tear strength and tensile strength, and service life long effect

Active Publication Date: 2022-03-22
圣戈班汇杰(杭州)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Resins for peelable coatings mainly include solvent-based resins, hot-melt resins, water-based polyurethane, acrylic, epoxy and other systems, but different systems have different performance characteristics. At present, there are the following three problems: First, there are a large number of solvent-based systems. The release of VOC from solvents has a great negative impact on the environment, while the VOC of water-based systems is greatly reduced or even eliminated; second, many strippable coatings are only suitable for some substrates, and do not have strippability for many substrates, broad-spectrum applicability Poor; Third, almost all strippable coating systems are not easy or impossible to strip after long-term protection, which will greatly reduce the application range of strippable coatings
At present, most strippable coatings can effectively reduce the adhesion between the paint film and the substrate with the help of strippable additives. Common strippable additives include high-grade fatty acid esters, fatty acid salts, waxes, surfactants, silicones, etc. These additives have a certain effect, but the side effects are relatively large, and have various adverse effects on the surface of the substrate.
[0004] CN109943176A discloses a strippable coating used for processing and protection of optical elements. The coating needs to be compounded with a polyurethane system on the basis of an acrylic system. The specific formula of the acrylic system is not clear. The peel strength and tear strength of the prepared strippable coating , stability and other specific properties are not accounted for, and the coating is only suitable for glass

Method used

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  • Water-based strippable coating, preparation method and application
  • Water-based strippable coating, preparation method and application
  • Water-based strippable coating, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 Method for preparing aqueous peeling coating provided by the present invention

[0047] The preparation step of the aqueous peeling coating provided in this embodiment is as follows:

[0048] (1) Take 60 parts of silicide emulsion (purchased from Luking, model PL.3127), 30 slices of pure absulu (purchased from preservation, model BLJ-998AD) and 24 parts of benzole emulsion (purchased from Good, model BLJ-818A), mixed 50 min, produce emulsion, stirring speed of 60 rpm;

[0049] (2) The thickener solution was obtained by diluting 7 thickeners (acrylate swelling thickeners, purchased from Roccohas, model TT935), and slowly dripped with thickener solution while stirring the emulsion. The stirring speed was 100 rpm, and the drip speed was about 10 drops / min, and 1.2 parts of thickener dilution was added dropwise;

[0050] (3) Continue while stirring the emulsion side to add 0.24 bentonite and 0.36 parts of gas phase silica, 1.5 parts pH regulator (AMP95, isobutanolam...

Embodiment 2

[0051] Effect of Embodiment 2 Different formulations of the acrylic emulsion on the preparation of waterborne peelable coating

[0052] The present embodiment is prepared by preparing a water-resistant peelable coating in Example 1, wherein the acrylic emulsion is prepared by formulating the formulation shown in Table 1, thereby further preparing aqueous peelless coating of different formulations, which will be prepared. The coating is applied to the metal surface, the thickness of 0.2 mm, the torn strength, tensile strength, 90 degree peel strength, maximum elongation of the prepared water-based peelable coating, the maximum elongation, and the detection method of the tear strength reference GB / T 529; Tensile strength detection method reference GB / T 528; method of detection of flexibility reference GB / T 1731; 90 degree peel strength detection method reference GB / T 2792, maximum cleavage elongation detection method reference GB / T 528. The test results are shown in Table ...

Embodiment 3

[0058] Example 3 Effects of Silicone Apropylene, Pure Eulfoxia and Phenylbenzoxide Emulsion

[0059] The present embodiment is prepared by the method for preparing a water-proof peelable coating in Example 1, wherein the silicone emulsion, pure extract, and benzole emulsions are prepared by formulating different proportional relationships shown in Table 2, thereby further preparing different water resistance. Stripping the coating, the prepared water-based peelable coating is applied to the metal surface, the thickness of 0.2 mm is applied, and the tension strength, tensile strength, 90 degree peel strength, maximum elongation elongation of the prepared water-based peelable coating is detected. Among them, the detection method of tear strength refers to GB / T 529; Tensile strength detection method reference GB / T 528; method of detection of flexibility reference GB / T1731; 90 degree peel strength detection method reference GB / T 2792; maximum breakage The detection method of e...

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Abstract

According to the water-based strippable coating, the preparation method and the application, the silicone-acrylic emulsion, the pure acrylic emulsion and the styrene-acrylic emulsion are compounded, the proportional relation is strictly controlled, the acrylic emulsion more suitable for preparing the strippable coating is obtained, and then the bentonite and the fumed silica are matched to play a synergistic reinforcing role, so that the water-based strippable coating is prepared. The water-based strippable coating with better tear strength, tensile strength, adhesive force, stability, constructability, weather resistance and other properties is prepared by adjusting the variety and addition mode of the thickening agent, is not easy to age, has longer shelf life, is suitable for various substrates such as metal, glass, plastic, ceramic, wood surfaces, paint surfaces and the like, is convenient to use, has better constructability, and can be widely applied to the field of coating materials. The market prospect is wide.

Description

Technical field [0001] The present invention relates to the field of release of peelable coating, and in particular, there is a method of preparing aqueous peeling coating, a preparation method and an application. Background technique [0002] Stripped coating is a special protective coating, which is coated on the surface of the substrate for isolation of external erosion, avoiding scratching, scratching, aging, pollution, dust, oil, fingerprint, etc. during production, transportation or storage. The influence, it is also known as a temporary protective coating, which can provide temporary protection for various substrate surfaces, and can be easily peeled off from the surface of the substrate after the protection is completed, and there is no negative effect on the surface of the substrate. [0003] The resin of the peelable coating is mainly solvent-type resin, hot melt resin, aqueous polyurethane, acrylic acid, epoxy, etc., but different systems have different performance cha...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D125/14C09D7/61C09D5/20
CPCC09D143/04C09D133/04C09D125/14C09D7/61C09D5/20C08L33/04C08L25/14C08K3/346C08K3/36
Inventor 徐金舟
Owner 圣戈班汇杰(杭州)新材料有限公司
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