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A kind of acrylic silicone water-emulsion paint and its preparation method and application

A technology of acrylic polysiloxane and acrylic acid, applied in the direction of coating, etc., can solve the problems affecting the performance of the coating film, and achieve the effects of easy coating, good weather resistance and high silicone content

Active Publication Date: 2015-11-18
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the compatibility of acrylate polymers and silicone polymers, the coating film often produces macroscopic phase separation, which seriously affects the performance of the coating film

Method used

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  • A kind of acrylic silicone water-emulsion paint and its preparation method and application
  • A kind of acrylic silicone water-emulsion paint and its preparation method and application
  • A kind of acrylic silicone water-emulsion paint and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0046] Example 1: Preparation of hydrogen-containing polymethylsiloxane emulsion

[0047] (1) Direct preparation

[0048] After mixing the emulsifier 6g sorbitan oleate S-80 (ie Span-80), 14g polyoxyethylene sorbitan oleate T-80 (ie Tween-80) and 200g water, Slowly add 100g of 202 high hydrogen-containing methyl silicone oil (containing 1.5wt% active hydrogen) dropwise under high-speed stirring (1500 rpm) at room temperature, continue stirring for 10 minutes after the addition is completed, and then change to low-speed stirring for 10 minutes, Stirring was stopped, and 320 g of hydrogen-containing polymethylsiloxane emulsion S1 (active hydrogen 1.5 wt %) was prepared.

[0049] Mix 2gS-80, 3gT-80, 1gT-85 and 200g water evenly, raise the temperature to 40°C, and slowly add hydrogen-containing methyl silicone oil (containing 0.75wt% active hydrogen) dropwise under high-speed stirring (1500 rpm) 100g, continue to stir for 10 minutes after the dropwise addition, then change to lo...

example 2

[0054] Example 2: Preparation of Acrylic Polymer

[0055] (1) Preparation of acrylic copolymer emulsion

[0056] After mixing 30g of methacrylic acid and 70g of ethyl acrylate, slowly drop them into 190g of aqueous solution containing 2g of nonylphenol polyoxyethylene ether (NP-10) and 1g of sodium dodecylbenzenesulfonate under rapid stirring After half an hour, the dropwise addition was completed, and then 0.3 g of ammonium persulfate was added to prepare a pre-emulsion. Then take 50g of it, add it to 10g of aqueous solution containing 0.2g of ammonium persulfate, stir, and heat up the water bath to 70°C for reaction. hour, then heated up to 85°C for half an hour, cooled, added water to 303g, and prepared an emulsion P1.

[0057] After mixing 10g of acrylic acid, 70g of ethyl acrylate, 10g of methyl acrylate and 10g of butyl methacrylate, slowly add it dropwise under rapid stirring to 190g of aqueous solution containing 2g of NP-10 and 1g of sodium dodecylbenzenesulfonate ...

Embodiment 3～17

[0063] Embodiment 3~17: the preparation of acrylic silicone water-emulsion coating

[0064] According to the hydrogen-containing polymethylsiloxane emulsion and the acrylic acid polymer obtained in the above examples 1-2, prepare the acrylic silicone water-emulsion paint according to the formula in Table 1, and the specific operation is as follows: the hydrogen-containing polymethylsiloxane The emulsion is compounded with the acrylic polymer or its emulsion at room temperature, and the corresponding water is added, and the corresponding acrylic silicone water-emulsion paint is respectively obtained after stirring evenly. The contents of each component are shown in Table 2.

[0065] Experiments have proved that at room temperature, hydrogen-containing polymethylsiloxane emulsions S1, S2, S3, ES1, ES2 and acrylic polysiloxane emulsions AS1, AS2, AS3 are still stable after one year of storage, without floating oil, separation, etc. Layer, precipitation, agglomeration, gel phenome...

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Abstract

The invention belongs to the technical field of acrylic coatings, and discloses an acrylic organosilicone water-emulsion coating as well as a preparation method and an application for the same. The acrylic organosilicone water-emulsion coating comprises the following components in the following parts by weight: 100 parts of water, 0.1-4 parts of an emulsifier, 5-20 parts of liquid hydrogen-containing polymethyl siloxane, and 5-50 parts of acrylic polymers. The organosilicone content of the acrylic organosilicone water-emulsion coating disclosed by the invention is up to more than 10% in the polymers, organosilicone and the acrylic polymers are compounded in a wide range, and curing film-forming is performed at a room temperature. The preparation process disclosed by the invention is simple, and the obtained emulsion is good in stability; and after curing film-forming, the acrylic organosilicone water-emulsion coating is good in mechanical performance (wherein the hardness can be up to 3 H), excellent in waterproof and hydrophobic performances, acid-base resistance, weather resistance, and adhesive force (which can be up to 2.5 MPa), and proper in peel strength (which can be up to 23 g / cm).

Description

technical field [0001] The invention belongs to the technical field of water-based coatings, in particular to an acrylic organic silicon water-emulsion coating and its preparation method and application. Background technique [0002] Water-based paint is an important measure for environmental protection, energy saving and emission reduction. The preparation technology of liquid polydimethylsiloxane aqueous emulsion has been relatively perfect, but because it has no crosslinking group, it cannot be dried at room temperature to form a film; the silicone coating prepared with silicone resin as the main film-former has Film-forming properties and the excellent high and low temperature resistance, water resistance, chemical resistance and special surface characteristics of silicone polymers have outstanding performance and attractive application prospects in the preparation of solvent-based coatings. However, due to the highly cross-linked structure of silicone resin, it is diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D183/12C09D183/05C09D183/06C09D7/12
Inventor 黄月文刘伟区罗广建
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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