阅读说明：本技术 一种多复合改性疏水真石漆及其制备方法 (Multi-composite modified hydrophobic stone-like paint and preparation method thereof ) 是由 李远华 覃现勇 于 2020-07-16 设计创作，主要内容包括：本发明公开了一种多复合改性疏水真石漆及其制备方法,包括如下重量份的原料制备而成：包括有机硅改性丙烯酸乳液100-200份、疏水侧链型水性聚氮醋缔合型增稠剂1-5份、天然石粉400-650份、荷叶疏水剂1-5份、长链硅氧氮烷乳液50-100份、成膜助剂5-20份、对羟基苯甲酸酯类防腐剂1-5份、消泡剂1-10份、去离子水50-100份；本发明通过复合多层疏水层提高疏水层的耐磨性,将传统亲水性的增稠剂、防腐剂等添加料改为疏水性的添加料,提高涂层的耐水性。(The invention discloses a multi-composite modified hydrophobic stone-like paint and a preparation method thereof, wherein the multi-composite modified hydrophobic stone-like paint is prepared from the following raw materials in parts by weight: comprises 200 parts of organic silicon modified acrylic emulsion 100-one, 1-5 parts of hydrophobic side chain type water-based poly-nitrogen vinegar associative thickener, 650 parts of natural stone powder 400-one, 1-5 parts of lotus leaf hydrophobic agent, 50-100 parts of long-chain silatrane emulsion, 5-20 parts of film-forming additive, 1-5 parts of p-hydroxybenzoate preservative, 1-10 parts of defoaming agent and 50-100 parts of deionized water; according to the invention, the abrasion resistance of the hydrophobic layer is improved by compounding the plurality of hydrophobic layers, and the conventional hydrophilic additives such as a thickening agent and a preservative are changed into hydrophobic additives, so that the water resistance of the coating is improved.)

1. The multi-composite modified hydrophobic stone-like paint is characterized by being prepared from the following raw materials in parts by weight: comprises 200 parts of organic silicon modified acrylic emulsion, 1-5 parts of hydrophobic side chain type water-based poly-nitrogen vinegar associative thickener, 650 parts of natural stone powder, 1-5 parts of lotus leaf hydrophobic agent, 50-100 parts of long-chain silatrane emulsion, 5-20 parts of film-forming additive, 1-5 parts of p-hydroxybenzoate preservative, 1-10 parts of defoaming agent and 50-100 parts of deionized water.

2. The multi-composite modified hydrophobic stone paint as claimed in claim 1, wherein butyl p-hydroxybenzoate is optimally used as the paraben preservative.

3. The multi-composite modified hydrophobic real stone paint as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: the water-based organic silicon modified acrylic acid emulsion paint comprises 100 parts of organic silicon modified acrylic acid emulsion, 1 part of hydrophobic side chain type water-based polynitrogen vinegar associative thickener, 400 parts of natural stone powder, 1 part of lotus leaf hydrophobic agent, 50 parts of long-chain siloxane-based emulsion, 5 parts of film-forming auxiliary agent, 1 part of p-hydroxybenzoate preservative, 1 part of defoaming agent and 50 parts of deionized water.

4. The multi-composite modified hydrophobic real stone paint as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: the paint comprises 150 parts of organic silicon modified acrylic emulsion, 3 parts of hydrophobic side chain type water-based polynitrogen vinegar associative thickener, 500 parts of natural stone powder, 3 parts of lotus leaf hydrophobing agent, 75 parts of long-chain siloxane-based emulsion, 12 parts of film-forming auxiliary agent, 3 parts of p-hydroxybenzoate preservative, 6 parts of defoaming agent and 75 parts of deionized water.

5. The multi-composite modified hydrophobic real stone paint as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: the water-based organic silicon modified acrylic acid emulsion comprises 200 parts of organic silicon modified acrylic acid emulsion, 5 parts of hydrophobic side chain type water-based polynitrogen vinegar associative thickener, 650 parts of natural stone powder, 5 parts of lotus leaf hydrophobic agent, 100 parts of long-chain siloxane-based emulsion, 20 parts of film-forming auxiliary agent, 5 parts of p-hydroxybenzoate preservative, 10 parts of defoaming agent and 100 parts of deionized water.

6. The preparation method of the multi-composite modified hydrophobic real stone paint as claimed in any one of claims 1 to 5, characterized by comprising the following steps:

(1) firstly, introducing deionized water into a reaction kettle, wherein a high-speed dispersion machine for stirring is arranged in the reaction kettle, and the dispersion machine is opened and is kept at a rotating speed of not less than 500 RPM;

(2) introducing the film forming assistant and the defoaming agent of one half of the components into a reaction kettle, and uniformly stirring for 5-10 minutes;

(3) introducing the hydrophobic side chain type aqueous poly nitrogen vinegar associative thickener into a reaction kettle, uniformly stirring, increasing the rotating speed to be not less than 800RPM, and stirring for 5-10 minutes;

(4) keeping the rotating speed of a dispersing machine in the reaction kettle, sequentially adding the organosilicon modified acrylic emulsion and the long-chain siloxane nitrogen alkyl emulsion into the reaction kettle, increasing the rotating speed to be not less than 1000RPM, stirring for 5-10 minutes, and adding a p-hydroxybenzoate preservative in the stirring process;

(5) maintaining the rotating speed of a dispersing machine in the reaction kettle, adding natural stone powder, stirring for 5-10 minutes, homogenizing in advance, adding a lotus leaf hydrophobing agent, stirring for 5-10 minutes, adding the film forming auxiliary agent and the defoaming agent of the rest components during the middle stirring period, and stirring to obtain the composite modified hydrophobic stone paint.

Technical Field

The invention particularly relates to a real stone paint, and particularly relates to a multi-composite modified hydrophobic real stone paint.

Background

The stone-like paint has decorative effect similar to that of marble and granite. The natural stone powder is mainly prepared from natural stone powder with various colors and applied to the stone imitation effect of building exterior walls, so the natural stone powder is also called liquid stone, when a plurality of real stone paints are produced, the emulsion which is the same as that for preparing emulsion paint is adopted, the emulsion content in the formula of the real stone paint is lower, the coating is not tight enough due to the existence of a large amount of sand stones during film forming, the real stone paint is easy to adsorb with a base material and is easy to strip paint, and the traditional real stone paint coating can turn white after raining every time and becomes loose, and after raining, the coating recovers the original color after being exposed to the sun. In fact, the reason of the formula is that the selected acrylic emulsion needs to be added with a surfactant during synthesis, and some manufacturers greatly exceed the used surfactant in order to increase the stability of the emulsion; some manufacturers add carboxymethyl cellulose, hydroxyethyl cellulose and other substances as a thickening agent and add sodium benzoate as a preservative when preparing the real stone paint. These substances are all water-soluble or hydrophilic, and the water resistance of the coating is greatly reduced when the coating is left in the coating after film forming, so that in order to solve the problem, a lot of hydrophobic materials are added into the real stone paint on the market at present to improve the water resistance of the coating.

The general hydrophobic material adopts a non-polar surface material, so that water molecules can not be firmly attached to the surface of the material; the contact area between water and the membrane is reduced by adopting a bulge and burr structure; due to the adoption of the nonpolar material, the film thickness is increased as much as possible, the charge influence between the base material and water molecules is reduced, and a better hydrophobic effect can be achieved under the conditions, but the nonpolar hydrophobic material and the polar base material cannot be firmly combined. The coating is not wear-resistant and is easy to peel off under the friction condition; secondly, the protrusion and burr structure can increase the thickness, but is very weak and not durable in practical use.

Disclosure of Invention

The invention aims to provide a multi-composite modified hydrophobic real stone paint to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the multi-composite modified hydrophobic stone-like paint is prepared from the following raw materials in parts by weight: comprises 200 parts of organic silicon modified acrylic emulsion, 1-5 parts of hydrophobic side chain type water-based poly-nitrogen vinegar associative thickener, 650 parts of natural stone powder, 1-5 parts of lotus leaf hydrophobic agent, 50-100 parts of long-chain silatrane emulsion, 5-20 parts of film-forming additive, 1-5 parts of p-hydroxybenzoate preservative, 1-10 parts of defoaming agent and 50-100 parts of deionized water.

Further scheme: the paraben preservative is preferably butyl paraben.

Further scheme: the feed is prepared from the following raw materials in parts by weight: the water-based organic silicon modified acrylic acid emulsion paint comprises 100 parts of organic silicon modified acrylic acid emulsion, 1 part of hydrophobic side chain type water-based polynitrogen vinegar associative thickener, 400 parts of natural stone powder, 1 part of lotus leaf hydrophobic agent, 50 parts of long-chain siloxane-based emulsion, 5 parts of film-forming auxiliary agent, 1 part of p-hydroxybenzoate preservative, 1 part of defoaming agent and 50 parts of deionized water.

Further scheme: the feed is prepared from the following raw materials in parts by weight: the paint comprises 150 parts of organic silicon modified acrylic emulsion, 3 parts of hydrophobic side chain type water-based polynitrogen vinegar associative thickener, 500 parts of natural stone powder, 3 parts of lotus leaf hydrophobing agent, 75 parts of long-chain siloxane-based emulsion, 12 parts of film-forming auxiliary agent, 3 parts of p-hydroxybenzoate preservative, 6 parts of defoaming agent and 75 parts of deionized water.

Further scheme: the feed is prepared from the following raw materials in parts by weight: the water-based organic silicon modified acrylic acid emulsion comprises 200 parts of organic silicon modified acrylic acid emulsion, 5 parts of hydrophobic side chain type water-based polynitrogen vinegar associative thickener, 650 parts of natural stone powder, 5 parts of lotus leaf hydrophobic agent, 100 parts of long-chain siloxane-based emulsion, 20 parts of film-forming auxiliary agent, 5 parts of p-hydroxybenzoate preservative, 10 parts of defoaming agent and 100 parts of deionized water.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, firstly, through the conversion from polarity to non-polarity of long-chain siloxane in the curing process, hydroxyl of a paint bottom can be firmly fixed on the surface of a base material, and a non-polar C-N-O long chain forms a hydrophobic surface which is wear-resistant and hydrophobic, wherein a multi-layer hydrophobic surface can be formed on the surface through the compounding of a lotus leaf hydrophobic agent, compared with the traditional acrylic emulsion or silicone-acrylate emulsion, the organic silicon modified acrylic emulsion has better water resistance and a better hydrophobic effect, and the use of a surface active agent is reduced.

The invention also aims to provide a preparation method of the multi-composite modified hydrophobic real stone paint, which comprises the following steps:

1. firstly, introducing deionized water into a reaction kettle, wherein a high-speed dispersion machine for stirring is arranged in the reaction kettle, and the dispersion machine is opened and is kept at a rotating speed of not less than 500 RPM;

2. introducing the film forming assistant and the defoaming agent of one half of the components into a reaction kettle, and uniformly stirring for 5-10 minutes;

3. Introducing the hydrophobic side chain type aqueous poly nitrogen vinegar associative thickener into a reaction kettle, uniformly stirring, increasing the rotating speed to be not less than 800RPM, and stirring for 5-10 minutes;

4. keeping the rotating speed of a dispersing machine in the reaction kettle, sequentially adding the organosilicon modified acrylic emulsion and the long-chain siloxane nitrogen alkyl emulsion into the reaction kettle, increasing the rotating speed to be not less than 1000RPM, stirring for 5-10 minutes, and adding a p-hydroxybenzoate preservative in the stirring process;

5. maintaining the rotating speed of a dispersing machine in the reaction kettle, adding natural stone powder, stirring for 5-10 minutes, homogenizing in advance, adding a lotus leaf hydrophobing agent, stirring for 5-10 minutes, adding the film forming auxiliary agent and the defoaming agent of the rest components during the middle stirring period, and stirring to obtain the composite modified hydrophobic stone paint.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.