A kind of organosilicon water-based paint and preparation method thereof

Abstract

The invention discloses a silicone water-based paint and a preparation method thereof. The silicone water-based paint comprises the following components in parts by weight: 50-80 parts of modified hydroxyl acrylic resin, 45-60 parts of fluorine-containing polysiloxane, initiator 1-2 parts of agent, 20-30 parts of organic solvent, 1-5 parts of auxiliary agent. In this application, the modified hydroxyacrylic resin is used as the main hydrophilic segment, and the fluorine-containing polysiloxane is used as a reaction component to cross-link the side chain of the hydrophilic main segment of the modified hydroxyacrylic resin, and the paint is cured to form a paint film Finally, fluorine-containing polysiloxane, as the organic silicon segment, can be stretched freely because it is less constrained by the structure, so it can form a microscopic molecular layer with a higher density of fluorine-containing polysiloxane on the surface of the coating film, so The surface structure of the paint film formed by the curing of the paint is dense enough to endow the surface of the paint film with a very good anti-graffiti effect.

Description

technical field

[0001] The invention relates to a water-based paint technology, in particular to a silicone water-based paint and a preparation method thereof. Background technique

[0002] With the continuous improvement of living standards, people's requirements for the use of architectural coatings are becoming increasingly stringent. Traditional inorganic decorative materials are extremely difficult to clean up when the walls are graffitied or stained. Researchers have also done some work on the research and development of anti-graffiti and anti-stick coatings. The research found that silicone additives have excellent hydrophobicity, oil repellency and lubricity. Surface energy for excellent low surface energy results.

[0003] However, in the existing anti-graffiti and anti-pollution paints, the active ingredients only add silicone additives on the surface of the paint film formed by the curing of the paint, but the amount of addition is small, and the silicone segmen...

Examples

preparation example Construction

[0035] Two of the purpose of the present invention is achieved by the following technical solutions: a method for preparing an organosilicon water-based coating, comprising the steps of:

[0036] (1) Add an organic solvent into a four-neck flask equipped with a stirring paddle, a thermometer and a condenser tube, and heat up to 100-160°C;

[0037] (2) Mix the modified hydroxyacrylic resin and the initiator, stir to make the mixture evenly, and form part A;

[0038] (3) Stir the fluorine-containing polysiloxane to make the mixture uniform and form part B;

[0039](4) Put part B into the flask, put part A into the dripping device, and add it dropwise at a constant speed within 2-5 hours; after the dropwise addition, raise the temperature by 5-10°C and keep it warm for 2 hours;

[0040] (5) Lower the temperature to 70°C or below, add additives, stir for 10-30 minutes and discharge.

[0041] Further, the preparation method of the fluoropolysiloxane is as follows: first vacuumize...

Embodiment 1-5

[0043] The raw materials were weighed according to the proportions in Table 1, and prepared according to the following steps, the difference being that the added raw material proportions were different, and the products were prepared, see Table 1 for details:

[0044] Table 1: Raw material ratio table of embodiment 1-5

[0045]

[0046]

[0047] Wherein, the modified hydroxy acrylic resin has a value of 80-150 mgKOH / g, and a number average molecular weight of 2000-20000 g / mol.

[0048] The preparation method of fluorine-containing polysiloxane is as follows: first vacuumize the reaction device, and keep the vacuum degree at 1.5×10 -1 pa; remove oxygen and moisture, and then pass nitrogen protection; add 50 parts by weight of fluorosilicone oil, 10 parts by weight of trimethoxysilane, 50 ppm of Speier catalyst, and 20 parts by weight of toluene, and stir evenly; react at 70 ° C for 3 hours; the product Transfer to a reduced pressure rotary evaporator at 1.5 x 10 -1 Unde...

technical field

[0001] The invention relates to a water-based paint technology, in particular to a silicone water-based paint and a preparation method thereof. Background technique

[0002] With the continuous improvement of living standards, people's requirements for the use of architectural coatings are becoming increasingly stringent. Traditional inorganic decorative materials are extremely difficult to clean up when the walls are graffitied or stained. Researchers have also done some work on the research and development of anti-graffiti and anti-stick coatings. The research found that silicone additives have excellent hydrophobicity, oil repellency and lubricity. Surface energy for excellent low surface energy results.

[0003] However, in the existing anti-graffiti and anti-pollution paints, the active ingredients only add silicone additives on the surface of the paint film formed by the curing of the paint, but the amount of addition is small, and the silicone segmen...

Examples

preparation example Construction

[0035] Two of the purpose of the present invention is achieved by the following technical solutions: a method for preparing an organosilicon water-based coating, comprising the steps of:

[0036] (1) Add an organic solvent into a four-neck flask equipped with a stirring paddle, a thermometer and a condenser tube, and heat up to 100-160°C;

[0037] (2) Mix the modified hydroxyacrylic resin and the initiator, stir to make the mixture evenly, and form part A;

[0038] (3) Stir the fluorine-containing polysiloxane to make the mixture uniform and form part B;

[0039](4) Put part B into the flask, put part A into the dripping device, and add it dropwise at a constant speed within 2-5 hours; after the dropwise addition, raise the temperature by 5-10°C and keep it warm for 2 hours;

[0040] (5) Lower the temperature to 70°C or below, add additives, stir for 10-30 minutes and discharge.

[0041] Further, the preparation method of the fluoropolysiloxane is as follows: first vacuumize...

Embodiment 1-5

[0043] The raw materials were weighed according to the proportions in Table 1, and prepared according to the following steps, the difference being that the added raw material proportions were different, and the products were prepared, see Table 1 for details:

[0044] Table 1: Raw material ratio table of embodiment 1-5

[0045]

[0046]

[0047] Wherein, the modified hydroxy acrylic resin has a value of 80-150 mgKOH / g, and a number average molecular weight of 2000-20000 g / mol.

[0048] The preparation method of fluorine-containing polysiloxane is as follows: first vacuumize the reaction device, and keep the vacuum degree at 1.5×10 -1 pa; remove oxygen and moisture, and then pass nitrogen protection; add 50 parts by weight of fluorosilicone oil, 10 parts by weight of trimethoxysilane, 50 ppm of Speier catalyst, and 20 parts by weight of toluene, and stir evenly; react at 70 ° C for 3 hours; the product Transfer to a reduced pressure rotary evaporator at 1.5 x 10 -1 Unde...

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