阅读说明：本技术 降低油性涂料voc排放的含水型溶剂 (Aqueous solvent for reducing VOC emission of oil paint ) 是由 徐优良 于 2020-07-14 设计创作，主要内容包括：本发明提供一种降低油性涂料VOC排放的含水型溶剂,包括有机溶剂及助溶剂；所述有机溶剂为与水部分相溶或全水溶性的溶剂,所述助溶剂为水。本发明在有机溶剂中加入助溶剂,使用本发明稀释油性涂料时,能保持涂料性质还是油性,使得油性涂料的性能仍能满足实际使用需求及性能测试,在不改变油性涂料的配方的前提下,能大幅度降低油性涂料VOC的排放,经济、节能又环保。(The invention provides a water-containing solvent for reducing VOC (volatile organic compounds) emission of an oil coating, which comprises an organic solvent and a cosolvent; the organic solvent is partially or completely soluble in water, and the cosolvent is water. According to the invention, the cosolvent is added into the organic solvent, so that when the oil paint is diluted by using the oil paint, the paint property can be maintained as oil, the performance of the oil paint can still meet the actual use requirement and performance test, the discharge of VOC of the oil paint can be greatly reduced on the premise of not changing the formula of the oil paint, and the oil paint is economic, energy-saving and environment-friendly.)

1. An aqueous solvent for reducing VOC emission of an oil paint is characterized by comprising an organic solvent and a cosolvent; the organic solvent is partially or completely soluble in water, and the cosolvent is water.

2. The aqueous solvent for reducing VOC emissions from oil-based paint according to claim 1, wherein said organic solvent comprises acetone, methyl isobutyl ketone, diacetone alcohol, isopropyl alcohol, propylene glycol methyl ether acetate, propylene carbonate, ethylene glycol ethers, and propylene glycol ethers.

3. The aqueous solvent for reducing VOC emissions from oil-based coatings according to claim 1 wherein said water is one of deionized water and purified water.

4. The aqueous solvent for reducing VOC emissions from oil-based paint according to claim 2, wherein said organic solvent is 50 to 99 parts by weight and said co-solvent is 1 to 50 parts by weight.

5. The aqueous solvent for reducing VOC emissions from oil-based paint according to claim 4, wherein said organic solvent comprises 5 to 40 parts by weight of acetone, 5 to 20 parts by weight of methyl isobutyl ketone, 5 to 25 parts by weight of diacetone alcohol, 0 to 40 parts by weight of isopropyl alcohol, 5 to 20 parts by weight of propylene glycol methyl ether acetate, 5 to 15 parts by weight of propylene carbonate, 0 to 25 parts by weight of ethylene glycol ether, and 0 to 25 parts by weight of propylene glycol ethers.

6. The aqueous solvent for reducing VOC emissions from oil-based paint according to claim 5, wherein said organic solvent comprises 10 to 35 parts by weight of acetone, 10 to 20 parts by weight of methyl isobutyl ketone, 10 to 20 parts by weight of diacetone alcohol, 5 to 30 parts by weight of isopropyl alcohol, 10 to 20 parts by weight of propylene glycol methyl ether acetate, 5 to 10 parts by weight of propylene carbonate, 5 to 20 parts by weight of ethylene glycol ether, and 5 to 20 parts by weight of propylene glycol ethers.

7. The aqueous solvent for reducing VOC emissions from oil-based paint according to claim 4 wherein said co-solvent is present in an amount of 5 to 50 parts by weight.

8. The aqueous solvent for reducing VOC emissions from oil-based paints according to claim 1, wherein said aqueous solvent is used to dilute oil-based paints.

9. The aqueous solvent for reducing VOC emissions from oil-based paints according to claim 1, wherein said organic solvent is used to dissolve the oil-based paint.

Technical Field

The invention relates to the field of coatings, in particular to a water-containing solvent for reducing VOC (volatile organic compounds) emission of an oil coating.

Background

Volatile Organic Compounds (VOC) emissions can be divided into organized and unorganized emissions, and the emission sources are mostly Organic solvents used in industrial processes. Especially in the industries of paint, ink, and painting, and the coating process in the industry is an open process and becomes a main source of volatile VOC.

With the development of modern industry and the increasing awareness of environmental protection, environment-friendly coatings will be the development trend of current and future coatings. The new edition of the VOC environmental protection mandatory standard GB30981-2020< limits of hazardous substances in industrial protective paint > will start to be implemented at 12 months and 1 day 2020, which means that industrial protective paint type plants face unprecedented challenges. On the premise of meeting the national regulation requirements, the VOC (volatile organic compounds) emission of the product can be reduced without reducing the performance of the coating or increasing the cost, which is an urgent and complex practical problem.

The current methods for reducing VOC (volatile organic compounds) emission of the coating or the ink mainly comprise the following methods:

1. water-soluble or semi-water-soluble film-forming resins (including but not limited to water-soluble epoxy, acrylic, polyester alkyd, UV-curable resins, etc.) are used as solvents for the coating or ink. However, this method has great limitations, and for some coatings with good metallic texture, not only the cost is high, but also the requirements of appearance and performance cannot be satisfied.

2. By means of the reactive emulsifier or chain extender, the coating or the ink has certain hydrophilicity by adjusting the dosage of the emulsifier or the chain extender, and is emulsified in water to prepare the water-based coating or the ink, so that the VOC emission is reduced.

Disclosure of Invention

The invention aims to provide a water-containing solvent for reducing VOC (volatile organic compound) emission of an oil coating, which can greatly reduce the VOC emission of the oil coating under the condition of not changing the formula of the oil coating.

In order to achieve the aim, the invention provides an aqueous solvent for reducing VOC (volatile organic compound) emission of an oil coating, which comprises an organic solvent and a cosolvent; the organic solvent is partially or completely soluble in water, and the cosolvent is water.

The organic solvent comprises acetone, methyl isobutyl ketone, diacetone alcohol, isopropanol, propylene glycol methyl ether acetate, propylene carbonate, ethylene glycol ether and propylene glycol ethers.

The water is one of deionized water and purified water.

In the aqueous solvent for reducing VOC (volatile organic compound) emission of the oil paint, 50 to 99 parts by weight of the organic solvent and 1 to 50 parts by weight of the cosolvent are used.

In the organic solvent, 5 to 40 parts by weight of acetone, 5 to 20 parts by weight of methyl isobutyl ketone, 5 to 25 parts by weight of diacetone alcohol, 0 to 40 parts by weight of isopropanol, 5 to 20 parts by weight of propylene glycol methyl ether acetate, 5 to 15 parts by weight of propylene carbonate, 0 to 25 parts by weight of ethylene glycol ether and 0 to 25 parts by weight of propylene glycol ethers are used.

In the organic solvent, 10 to 35 parts by weight of acetone, 10 to 20 parts by weight of methyl isobutyl ketone, 10 to 20 parts by weight of diacetone alcohol, 5 to 30 parts by weight of isopropanol, 10 to 20 parts by weight of propylene glycol methyl ether acetate, 5 to 10 parts by weight of propylene carbonate, 5 to 20 parts by weight of ethylene glycol ether and 5 to 20 parts by weight of propylene glycol ethers are used.

The cosolvent accounts for 5 to 50 parts by weight.

The aqueous solvent for reducing VOC emission of the oil paint is used for diluting the oil paint.

The organic solvent is used to dissolve the oil-based paint.

The invention has the beneficial effects that: the invention provides a water-containing solvent for reducing VOC (volatile organic compounds) emission of an oil coating, which comprises an organic solvent and a cosolvent; the organic solvent is partially or completely soluble in water, and the cosolvent is water. The invention adds cosolvent into organic solvent, and mixes acetone, methyl isobutyl ketone, diacetone alcohol, isopropanol, propylene glycol methyl ether acetate, propylene carbonate, glycol ether, propylene glycol ether and the like with water by utilizing the hydrotropy of water to prepare the water-containing solvent. When the oil paint is diluted, the paint property can be kept as oil, so that the performance of the oil paint can still meet the actual use requirement and performance test, and the discharge of VOC of the oil paint can be greatly reduced on the premise of not changing the formula of the oil paint. And the cosolvent adopts water, and the cost of the water is very low, so that the environment is not polluted, and the method is economical, energy-saving and environment-friendly.

Detailed Description

To further illustrate the technical means and effects of the present invention, the following detailed description is provided.

The invention provides a water-containing solvent for reducing VOC (volatile organic compounds) emission of an oil coating, which comprises an organic solvent and a cosolvent; the organic solvent is partially or completely soluble in water, and the cosolvent is water. The water-containing solvent can greatly reduce VOC emission by adding the cosolvent into the organic solvent, and when the water-containing solvent is used as a diluent to dilute the oil paint, the paint is still oily, and the performance of the oil paint can still meet the actual use requirement and performance test.

Specifically, the organic solvent includes acetone, methyl isobutyl ketone, diacetone alcohol, isopropyl alcohol, propylene glycol methyl ether acetate, propylene carbonate, ethylene glycol ethers, and propylene glycol ethers. Since acetone, methyl isobutyl ketone, diacetone alcohol, isopropyl alcohol, propylene glycol methyl ether acetate, propylene carbonate, ethylene glycol ether, and propylene glycol ethers have good compatibility with the oil-based paint, the organic solvent can dissolve a large amount of the oil-based paint, and thus can dissolve the oil-based paint as a solvent for the oil-based paint.

Specifically, the water is one of deionized water and purified water.

Specifically, in the aqueous solvent, the organic solvent is 50 to 99 parts by weight, and the cosolvent is 1 to 50 parts by weight.

Specifically, in the organic solvent, acetone is 5 to 40 parts by weight, methyl isobutyl ketone is 5 to 20 parts by weight, diacetone alcohol is 5 to 25 parts by weight, isopropyl alcohol is 0 to 40 parts by weight, propylene glycol methyl ether acetate is 5 to 20 parts by weight, propylene carbonate is 5 to 15 parts by weight, ethylene glycol ether is 0 to 25 parts by weight, and propylene glycol ethers are 0 to 25 parts by weight.

Preferably, in the organic solvent, acetone is 10 to 35 parts by weight, methyl isobutyl ketone is 10 to 20 parts by weight, diacetone alcohol is 10 to 20 parts by weight, isopropyl alcohol is 5 to 30 parts by weight, propylene glycol methyl ether acetate is 10 to 20 parts by weight, propylene carbonate is 5 to 10 parts by weight, ethylene glycol ether is 5 to 20 parts by weight, propylene glycol ethers are 5 to 20 parts by weight

Preferably, the co-solvent is 5 to 50 parts by weight.

Specifically, the aqueous solvent is used to dilute an oil-based paint.

Specifically, the organic solvent is used to dissolve an oil-based paint.

In conclusion, the invention provides a water-containing solvent for reducing VOC emission of an oil coating. The water-containing solvent for reducing VOC (volatile organic compounds) emission of the oil-based paint is prepared by adding a cosolvent into an organic solvent, and mixing acetone, methyl isobutyl ketone, diacetone alcohol, isopropanol, propylene glycol methyl ether acetate, propylene carbonate, glycol ether and propylene glycol ether with water by utilizing the hydrotropy of water. When the oil paint is diluted, the paint property can be kept as oil, so that the performance of the oil paint can still meet the actual use requirement and performance test, and the discharge of VOC of the oil paint can be greatly reduced on the premise of not changing the formula of the oil paint. And the cosolvent adopts water, and the cost of the water is very low, so that the environment is not polluted, and the method is economical, energy-saving and environment-friendly.

As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.