Water-soluble organic silicon modified polyester resin and water-soluble coating

Abstract

The invention provides a water-soluble organic silicon modified polyester resin. A preparation method of the water-soluble organic silicon modified polyester resin comprises the following steps: putting reaction raw materials, namely 26-50 parts by weight of polyhydric alcohols, 10-63 parts by weight of polysiloxane, 17-40 parts by weight of polyatomic acids and 0.01-0.05 part by weight of a titanate catalyst, into a reactor, and introducing nitrogen into the reactor; after a reaction is completed, carrying out end sealing with 5-10 parts by weight of an end sealing agent, further adding 10-25parts by weight of a diluent to carry out a reaction, and controlling conditions such as reaction temperatures and reaction sequences in each step, thereby obtaining the water-soluble organic siliconmodified polyester resin. The invention further provides a water-soluble coating. The water-soluble organic silicon modified polyester resin provided by the invention has good glossiness, transparency and adhesive force, and in addition has good water solubility and thermal resistance.

Description

technical field [0001] The invention relates to the technical field of polyester technology, in particular to a water-soluble organosilicon-modified polyester resin and a water-soluble paint. Background technique [0002] Silicone modified polyester resin combines the advantages of silicone resin and polyester resin. It has the characteristics of high temperature resistance, weather resistance, yellowing resistance and good adhesion, and is widely used in the coating industry. At present, almost all silicone-modified polyester coatings on the market are solvent-based coatings, and the solvents contained in them have a great impact on the environment and construction personnel. With the improvement of environmental protection requirements, solvent-based coatings will gradually be replaced by water-based coatings. The preparation of water-soluble organosilicon-modified polyester resin is the key technology for water-based organosilicon-modified polyester coatings. After conv...

AI Technical Summary

Problems solved by technology

Although there are many studies on water-soluble silicone-modified polyester resins, they still cannot meet the requirements of multiple performance indicators such as hot hardness, and the scope of application is limited to products that operate at low temperature.

Moreover, the transparency of the water-soluble organosilicon-modified polyester resin in the prior art is relatively low, generally in a relatively turbid state

Or it can only meet the requirements of one performance index, and it cannot meet the requirements of heat resistance, good transparency, and good water solubility.

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