CN102618126B - Nitrocellulose transparent primer and application thereof - Google Patents

Abstract

The invention discloses a nitro transparent primer and its application. The primer is prepared by mixing a main paint and a diluent at a mass ratio of 1: (0.4-0.6); the main paint is made of 21.0-25.0% Alkyd resin, 6.0-8.0% hard resin, 0.2% dispersant, 45.0-50.0% nitrocellulose solution, 3.0-5.0% plasticizer, 8.0-10.0% extender pigment, 4.0-6.0% grinding aid, 0.5% Obtained after anti-settling agent, 0.2% defoamer, 0.1% anti-yellowing agent and 5.5% main paint solvent are mixed uniformly: used extender pigment is two or more mixtures in talcum powder, transparent powder or silicon micropowder; The thinner is obtained by mixing 42% ester solvents, 33% aromatic hydrocarbon solvents, 13% mineral spirits and 12% alcohol ether solvents and stirring evenly. The recoating nitro transparent primer of the present invention has high transparency, fast drying, good paint film filling, good sanding performance, high fullness, effectively reduces the number of constructions, and each component does not add benzene-containing solvents, which is extremely The earth protects the health of construction workers and effectively reduces environmental pollution. It can be widely used in home decoration, furniture and other aspects.

Description

A kind of nitro transparent primer and its application

technical field

The invention belongs to the field of coatings, and in particular relates to an oily nitro transparent primer for wood decoration and its application.

Background technique

At present, in the furniture market, nitro lacquer is favored by consumers because of its good ability to highlight the essential beauty of wood grain. Many traditional nitro paints use nitrocellulose as a film-forming material, which has a low solid content, and the paint film dries up after drying, and the filling is not enough, so it needs to be painted many times; the use of ordinary extender pigments will cause the paint film to have poor transparency after drying. It cannot better show the texture of wood, which affects the appearance of furniture; the traditional nitro transparent primer has low solid content and less extender pigment, which affects the filling performance of the product. Excessive man-hours; the traditional nitro transparent primer also adopts the ratio of main paint: diluent = 1: 1. This ratio has more volatile solvents, which not only causes waste of resources, but also pollutes the environment and damages people's health.

Contents of the invention

In order to overcome the shortcomings and deficiencies of the prior art, the primary purpose of the present invention is to provide a nitro transparent primer, which can quickly level and dry quickly after brushing, does not foam after surface drying, and is completely dry after drying. The paint film has good filling property, good sandability, high transparency and moderate hardness.

Another object of the present invention is to provide the purposes of above-mentioned nitro transparent primer.

The object of the present invention is achieved through the following technical solutions:

A kind of nitro transparent primer, which is made by mixing main paint and diluent in a mass ratio of 1: (0.4-0.6), and the volatile organic compounds (VOC) produced when mixed in this mass ratio are far less than the national and environmental standard. The base paint and thinner can be stored separately and mixed when used.

Described main paint obtains after mixing the components of the following mass percentages:

Alkyd resin: 21.0-25.0%

Hard resin: 6.0-8.0%

Dispersant: 0.2%

Nitrocellulose solution: 45.0-50.0%

Plasticizer: 3.0-5.0%

Extender pigment: 8.0-10.0%

Grinding aid: 4.0-6.0%

Anti-sedimentation agent: 0.5%

Defoamer: 0.2%

Anti-yellowing agent: 0.1%

Main paint solvent: 5.5%;

Preferably, take alkyd resin first, add dispersant and 6/11 mass of main paint solvent, stir well; then add nitrocellulose, plasticizer and hard resin, stir well; then add anti-settling agent, grinding aid and extender pigments, and stir until the fineness is ≤60um; finally add defoamer, anti-yellowing agent and the remaining main paint solvent, and get the main paint after stirring evenly.

The alkyd resin is soybean oil short oil alkyd with a solid content of 60-80%, preferably soybean oil short oil alkyd with a solid content of 70%. Soybean oil short-oil alkyd resin is used as a physical modification resin, which requires dryness and moderate hardness. This type of resin is: soybean oil short-oil alkyd resin from Jiangmen Paint Factory, soybean oil short-oil alkyd resin from Taiwan Changxing Chemical Co., Ltd. This kind of resin has light color, good transparency, will not affect the transparency of varnish, and has good yellowing resistance, good paint film body, good toughness and adhesion.

The hard resin is a solid modified resin with a solid content of 50-70% that can be dissolved in esters, ketones or aromatic solvents. This type of resin has good hardness and high solid content, which can significantly improve the paint film after drying. performance. The hard resin is preferably a maleic acid modified rosin resin.

The nitrocellulose solution is nitrocellulose with a solid content of 28% after the dry cotton with a second specification of 1/2 second, 1/4 second or 1/8 second is dissolved in a mixed solvent of ethyl acetate, butyl acetate and toluene Liquid, this kind of nitrocellulose has low viscosity, good fluidity, good flexibility of paint film, suitable for high solid nitrocellulose paint.

The pigment extender is a pigment extender with high transparency; preferably, the pigment extender is a mixture of two or more of talcum powder, transparent powder or microsilica powder.

The plasticizer does not contain phthalate plasticizers prohibited by the state, such as epoxy soybean oil, modified polyester resin, etc., and meets the requirements of environmental protection.

The main paint solvent is a mixture of two or more of ethylene glycol butyl ether, butyl acetate, xylene, ethyl acetate or sec-butyl acetate.

The diluent is obtained by mixing 42% of ester solvents, 33% of aromatic solvents, 13% of mineral spirits and 12% of alcohol ether solvents, and stirring evenly; the percentages are mass percentages;

Described ester solvent is preferably butyl acetate and ethyl acetate;

The preferred xylene and toluene of described aromatic hydrocarbon solvent;

The alcohol ether solvents are preferably ethylene glycol butyl ether and propylene glycol methyl ether acetate.

The above-mentioned nitro clear primer can be used for wood finishing.

Compared with the prior art, the present invention has the following advantages and effects:

1, the nitro transparent primer of the present invention, take nitrocellulose, alkyd resin as base material, take high transparency extender pigment as filler, especially use a kind of high transparency transparent powder to replace part talcum powder, provide higher weight Apply transparency. Nitrocellulose provides fast drying performance and good workability, alkyd resin provides the flexibility and fullness of the paint film, extender pigments provide the filling and sanding properties of the paint film, and the ratio of main paint and thinner is in line with Environmental protection requirements, the body pigment used is cheap, greatly reducing its cost.

2. Using the nitro transparent primer of the present invention, compared with ordinary nitro transparent primers, the paint film has good filling performance, good sanding performance, high fullness, effectively reduces the number of constructions, and each component does not contain Benzene solvent, the ratio of main paint and thinner used is 1: (0.4-0.6), which greatly protects the health of construction workers and effectively reduces environmental pollution. It can be widely used in home decoration, furniture, etc.

Detailed ways

The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

Example 1

A kind of nitro transparent primer, is prepared by following method:

(1) Preparation of main paint: Weigh 210g of soybean oil short oil alkyd (Changxing Chemical) and put it into the dispersion tank, stir; weigh 2g of wetting and dispersing agent (EFKA), 30g of main paint solvent and slowly add to the mixture containing soybean oil short oil In the oil alkyd dispersion tank, stir evenly at a speed of 600-800r/min; weigh 500g of nitrocellulose solution (Dekang), 50g of epoxy soybean oil, and 60g of maleic acid modified rosin resin and add them to the dispersion tank. Stir evenly at a stirring speed of 800-1000r/min, then slowly add 5g of anti-sedimentation agent organic bentonite, 40g of grinding aid zinc stearate, 80g of talc powder, and 20g of microsilica powder into the dispersion tank while stirring. Increase to 2000-2500r/min and disperse for 20-25min until the fineness is ≤60um. Finally, 2g of silicone defoamer (purchased from BASF, Germany), 1g of anti-yellowing agent KH-10 (Dongguan Lingrui Chemical Industry) and Add 25g of main paint solvent into the slurry, and stir at a speed of 1000-1200r/min for 10-15min, and get the main paint after stirring evenly;

Described main paint solvent is made up of 10g ethylene glycol butyl ether, 35g xylene and 10g butyl acetate.

(2) Preparation of diluent: Weigh 180g butyl acetate, 240g ethyl acetate, 50g ethylene glycol butyl ether, 70g propylene glycol methyl ether acetate, 200g xylene, 130g toluene, 130g 120# solvent oil, with 500- Stir at a speed of 600r/min for 10-15min, and get the diluent after stirring evenly.

(3) When using, mix the main paint and diluent uniformly at a mass ratio of 1:0.4 to obtain a nitro transparent primer.

Example 2

A kind of nitro transparent primer, is prepared by following method:

(1) Preparation of main paint: Weigh 230g of soybean oil short oil alkyd (Jiangmen paint) and put it into the dispersion tank, stir; weigh 2g of wetting and dispersing agent (EFKA), 30g of main paint solvent and slowly add to the mixture containing soybean oil In the short-oil alkyd dispersion tank, stir evenly at a speed of 600-800r/min; weigh 470g of nitrocellulose solution (Dekang), 40g of epoxy soybean oil, and 70g of maleic acid modified rosin resin and add them to the dispersion tank , stir evenly at a stirring speed of 800-1000r/min, then slowly add 5g of anti-sedimentation agent organic bentonite, 50g of grinding aid zinc stearate, 70g of talcum powder, and 20g of transparent powder into the dispersion tank while stirring, and put Increase the rotation speed to 2000-2500r/min and disperse for 20-25min until the fineness is ≤60um. Finally, add 2g of silicone defoamer (purchased from BASF, Germany) and 1g of anti-yellowing agent KH-10 (Dongguan Lingrui Chemical Co., Ltd.) Add 25g of main paint solvent into the slurry, and stir at a speed of 1000-1200r/min for 10-15min, and get the main paint after stirring evenly;

Described main paint solvent is made up of 10g ethylene glycol butyl ether, 35g xylene and 10g butyl acetate.

(2) Preparation of diluent: Weigh 180g butyl acetate, 240g ethyl acetate, 50g ethylene glycol butyl ether, 70g propylene glycol methyl ether acetate, 200g xylene, 130g toluene, 130g 120# solvent oil, with 500- Stir at a speed of 600r/min for 10-15min, and get the diluent after stirring evenly.

(3) When using, mix the main paint and diluent uniformly at a mass ratio of 1:0.5 to obtain a nitro transparent primer.

Example 3

A kind of nitro transparent primer, is prepared by following method:

(1) Preparation of the main paint: Weigh 250g of soybean oil short oil alkyd (Changxing Chemical) and put it into the dispersion tank, stir; weigh 2g of wetting and dispersing agent (EFKA) and 30g of main paint solvent and slowly add it to the mixture containing soybean oil short oil In the oil alkyd dispersion tank, stir evenly at a speed of 600-800r/min; weigh 450g of nitrocellulose solution (Dekang), 30g of epoxy soybean oil, and 60g of maleic acid modified rosin resin and add them to the dispersion tank. Stir evenly at a stirring speed of 800-1000r/min, then slowly add 5g of anti-sedimentation agent organic bentonite, 60g of grinding aid zinc stearate, 60g of talc powder, and 20g of silicon micropowder into the dispersing tank while stirring. Increase to 2000-2500r/min and disperse for 20-25min until the fineness is ≤60um. Finally, 2g of silicone defoamer (purchased from BASF, Germany), 1g of anti-yellowing agent KH-10 (Dongguan Lingrui Chemical Industry) and Add 25g of main paint solvent into the slurry, and stir at a speed of 1000-1200r/min for 10-15min, and get the main paint after stirring evenly;

Described main paint solvent is made up of 10g ethylene glycol butyl ether, 35g xylene and 10g butyl acetate.

(2) Preparation of diluent: Weigh 180g butyl acetate, 240g ethyl acetate, 50g ethylene glycol butyl ether, 70g propylene glycol methyl ether acetate, 200g xylene, 130g toluene, 130g 120# solvent oil, with 500- Stir at a speed of 600r/min for 10-15min, and get the diluent after stirring evenly.

(3) When using, mix the main paint and diluent uniformly at a mass ratio of 1:0.6 to obtain a nitro transparent primer.

The performance of the nitro transparent primer prepared in the embodiment was tested on a plate, and the results are shown in Table 1.

As can be seen from Table 1: the nitro transparent primer of the present invention has fast drying speed, good workability and is easy to polish. Due to the high solid content of the main paint and the construction ratio 1: (0.4-0.6) lower than the traditional nitro paint, the volatile organic compound (VOC) produced is less than 700g/L, which meets the requirements of GB18581-2009 and HG/T414-2007, and is effective Reduce environmental pollution and protect the environment. Moreover, the number of construction passes is less than that of traditional nitro paint, which saves time and labor, and greatly reduces the physical hazards to construction workers.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (7)

1. A nitro transparent primer is characterized in that: it is formed by mixing main paint and diluent by mass ratio 1:(0.4-0.6); Described main paint is obtained after mixing the components of the following mass percentages: Alkyd resin: 21.0-25.0% Hard resin: 6.0-8.0% Dispersant: 0.2% Nitrocellulose solution: 45.0-50.0% Plasticizer: 3.0-5.0% Body pigment: 8.0-10.0% Grinding aid: 4.0-6.0% Anti-sedimentation agent: 0.5% Defoamer: 0.2% Anti-yellowing agent: 0.1% Main paint solvent: 5.5%; Described plasticizer is modified polyester; The extender pigment is a mixture of two or more of talcum powder, transparent powder or silica powder; The diluent is obtained by mixing 42% ester solvent, 33% aromatic hydrocarbon solvent, 13% mineral spirits and 12% alcohol ether solvent and stirring evenly; the stated percentages are mass percentages. 2. nitro transparent primer according to claim 1, is characterized in that: described main paint is prepared by the following steps: Take alkyd resin, add dispersant and 6/11 quality main paint solvent, stir well; then add nitrocellulose, plasticizer and hard resin, stir well; then add anti-settling agent, grinding aid and extender pigment, Stir until fineness≦60um; finally add defoamer, anti-yellowing agent and the remaining main paint solvent, stir well to get the main paint. 3. nitro transparent primer according to claim 1, is characterized in that: described alkyd resin is soybean short oil alkyd. 4. nitro transparent primer according to claim 1, is characterized in that: described hard resin is maleic acid modified rosin resin. 5. nitro transparent primer according to claim 1, is characterized in that: described main paint solvent is two in ethylene glycol butyl ether, butyl acetate, xylene, ethyl acetate or sec-butyl acetate a mixture of the above. 6. nitro transparent primer according to claim 1, is characterized in that: Described ester solvent is butyl acetate and ethyl acetate; Described aromatic solvent is xylene and toluene; The alcohol ether solvents are ethylene glycol butyl ether and propylene glycol methyl ether acetate. 7. the application of the nitro transparent primer described in any one of claim 1-6 in wood decoration.