CN103045054B - A kind of high rigidity unsaturated polyester white primer and preparation method thereof - Google Patents

Abstract

The present invention relates to chemical technology field, specifically disclose a kind of high rigidity unsaturated polyester white primer and preparation method thereof.Its compositing formula comprises first component, different Rinmann's green (Lan Shui), methylethyl ketone peroxide (plain boiled water), thinner composition, and the weight ratio of described first component, different Rinmann's green (Lan Shui), methylethyl ketone peroxide (plain boiled water) is 100:(0.8 ~ 2): (1 ~ 2.5): (30 ~ 40).It solve the problem of PU polyurethane coating difference of hardness, use unsaturated polyester coating can reduce coating VOC content simultaneously, and possessed good fullness ratio and filling effect.<!--1-->

Description

A kind of high hardness unsaturated polyester white primer and preparation method thereof

technical field

The invention relates to the technical field of chemical engineering, more specifically, the invention relates to a high-hardness unsaturated polyester white primer and a preparation method thereof.

Background technique

Wood coating refers to the coating used on equipment made of MDF, solid wood board, veneer, etc., including furniture, floors, stationery, musical instruments and architectural decoration materials. It can be roughly divided into two categories. One is used for furniture. Manufacturing plants, one type is used for interior decoration and decoration; at present, the competition of furniture manufacturing plants is becoming more and more fierce, and most of the furniture manufacturing plants need to reduce the cost urgently, and the cost of paint decoration is one of the ways for furniture factories to reduce the cost of furniture products At present, most furniture manufacturers use PU polyurethane coatings, nitrocellulose coatings, etc., which require multiple sprays to achieve the required performance, which makes the furniture manufacturing cost and labor comprehensive cost high. The current problems of PU polyurethane coatings and nitrocellulose coatings are poor hardness, high VOC content of volatile substances, and poor fullness. Only after multiple sprays can a certain film thickness be required.

Contents of the invention

Aiming at the above-mentioned technical problems, the present invention provides a high-hardness unsaturated polyester white primer, which solves the problem of poor hardness of PU polyurethane coatings. At the same time, the use of unsaturated polyester coatings can reduce the VOC content of coatings, and has a good Fullness and filling effect.

In order to solve the above technical problems, the technical solution provided by the present invention is: a high-hardness unsaturated polyester white primer, which consists of component A, cobalt isozincate (blue water), methyl ethyl ketone peroxide (white water), and thinner , The weight ratio of component A, cobalt isozincate (blue water) and methyl ethyl ketone peroxide (white water) is 100: (0.8-2): (1-2.5): (30-40). The weight percentage of the said component A is: 38%-45% of air-drying unsaturated polyester resin, 0.1%-0.3% of defoamer, 0.1%-0.3% of dispersant, 0.1%-0.2% of polymerization inhibitor %, anti-settling agent 0.1%~0.5%, titanium dioxide 6%~10%, zinc stearate 3%~5%, calcium carbonate powder 40%~50%, solvent 2%~4.5%, leveling agent 0.1% ~0.3%, the sum of the above raw materials in component A is 100%.

Further: In the above-mentioned high-hardness unsaturated polyester white primer, in the first component, the viscosity of the air-drying unsaturated polyester resin is 1600-2000CPS, and the solid content is 75 %～83%, pale yellow transparent liquid. In the component A, the solvent is styrene, and the air-drying unsaturated polyester resin is preferably Changxing 2307-S, 2310; the defoamer is an acrylate defoamer commonly used by those skilled in the art, preferably EFKA2720, BYK057; the leveling agent is an acrylate leveling agent, preferably EFKA3777, BYK358N; the dispersant is a polymer dispersant, preferably EFKA4010, BYK110; the polymerization inhibitor is hydroquinone, preferably Guangdong Foshan Huaneng Chemical Hydroquinone reagent; the anti-settling agent is fumed silica, preferably M-5 and R-972. The titanium dioxide is rutile titanium dioxide, preferably DuPont R-900 and R-706. The zinc stearate is preferably Singapore PLB, Guangdong Zhongshan Bailihe 1819. Described calcium carbonate is to superfine heavy calcium carbonate, preferably Guangdong Jiaoling 1250 order heavy calcium. The code names of each material among the present invention are the product codes of manufacturers or commercially available.

The present invention also provides a preparation method for the above-mentioned high-hardness unsaturated polyester white primer, including the preparation of component A and mixing component A, cobalt isozincate, methyl ethyl ketone peroxide, and diluent uniformly according to the dosage, which is characterized in that : The preparation steps of component A are as follows,

A. Put the unsaturated polyester resin, defoamer, and polymerization inhibitor into the paint tank, and stir and mix at a speed of 700-800 rpm for 5-8 minutes to obtain a resin mixture.

B. Add the anti-sedimentation agent and titanium dioxide into the paint vat made of resin mixture, and stir at 2500-3500 rpm for 10-12 minutes;

C. Add zinc stearate and calcium carbonate into the paint making tank, and stir at 2500-3500 rpm for 10-12 minutes;

D. Add the solvent and leveling agent into the paint tank, and stir at 1000-1200 rpm for 10-12 minutes to obtain component A.

The present invention compares with prior art, and the technical point that the present invention is different from polyurethane coating, nitrocellulose coating is:

1. A kind of unsaturated polyester resin is selected as the main film-forming substance, which simultaneously shows the hardness that PU polyurethane coating and nitrocellulose coating cannot achieve.

2. Because the selected unsaturated resin is used as a film-forming material, the resin has a low viscosity (2500-3500MAPS/25°C) and a high solid content (78-85%), so it has the fullness that polyurethane coatings cannot have.

3. Since the solvent used in the coating formulation is styrene monomer, it reacts with the unsaturated resin, that is, the film-forming substance, so that the coating has 100% solid content, that is, the VOC content is close to 0.

detailed description

The gist of the present invention is to use a unique unsaturated polyester resin as the main film-forming substance, and the solvent is styrene monomer to participate in the reaction with the unsaturated resin, that is, the film-forming substance, so that the coating has a solid content of 100%, that is, the VOC content is close to 0. . Below in conjunction with embodiment, content of the present invention will be further described:

Example 1

A kind of high hardness unsaturated polyester white primer, it is made up of first component, cobalt isozincate, methyl ethyl ketone peroxide and diluent, the weight ratio of described first component, isozincate cobalt, methyl ethyl ketone peroxide is 100:1.5:1.7:30; the accelerator is cobalt isozincate (blue water), selected from Shanghai Changfeng Chemical EC-6F. The initiator is methyl ethyl ketone peroxide (white water), selected from Shanghai Changfeng Chemical Industry 808A.

The weight percent of said A component is composed of: select Changxing 2307-S unsaturated polyester resin 38%, EFKA2720 defoamer 0.2%, EFKA4010 dispersant 0.2%, hydroquinone 0.1%, M-5 anti-sedimentation Agent 0.2%, R-900 titanium dioxide 6%, PLB zinc stearate 3%, 1250 mesh calcium carbonate powder 50%, styrene 2.1%, EFKA3777 leveling agent 0.2%.

The weight percent of described diluent is composed of styrene 20%, ethyl ester 40%, toluene 40%.

The method for preparing the high-hardness unsaturated polyester white primer of this embodiment includes the preparation of component A and mixing component A, cobalt isozincate, methyl ethyl ketone peroxide, and diluent uniformly according to the dosage, and the preparation steps of component A as followed,

Step A: put the unsaturated polyester resin, defoamer and polymerization inhibitor into the paint making tank, stir and mix at the speed of 700-800 rpm for 5-8 minutes to prepare the resin mixture.

Step B: Add the anti-sedimentation agent and titanium dioxide into the paint vat made of the resin mixture at a low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step C: Add zinc stearate and calcium carbonate into the paint-making tank at low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step D: Add the solvent and leveling agent into the paint tank at low speed, and stir at 1000-1200 rpm for 10-12 minutes.

The high-hardness unsaturated polyester white primer obtained in this example was tested and analyzed according to national standards GB-18581-2009 and GB/T23997-2009, and its properties are shown in Tables 1 and 2.

Example 2

A kind of high hardness unsaturated polyester white primer, it is made up of first component, cobalt isozincate, methyl ethyl ketone peroxide and diluent, the weight ratio of described first component, isozincate cobalt, methyl ethyl ketone peroxide is 100:1.5:1.7:30; the accelerator is cobalt isozincate (blue water), selected from Shanghai Changfeng Chemical EC-6F. The initiator is methyl ethyl ketone peroxide (white water), selected from Shanghai Changfeng Chemical Industry 808A.

The weight percent of the said A component is composed of: select Changxing 2310 unsaturated polyester resin 40%, EFKA2720 defoamer 0.2%, BYK110 dispersant 0.2%, hydroquinone 0.1%, M-5 anti-settling agent 0.2% %, R-900 titanium dioxide 6%, PLB zinc stearate 4%, 1250 mesh calcium carbonate powder 45%, styrene 2.1%, BYK358N leveling agent 0.2%.

The weight percent of described diluent is composed of styrene 30%, ethyl ester 40%, toluene 30%.

The method for preparing the high-hardness unsaturated polyester white primer of this embodiment includes the preparation of component A and mixing component A, cobalt isozincate, methyl ethyl ketone peroxide, and diluent uniformly according to the dosage, and the preparation steps of component A as followed,

Step A: put the unsaturated polyester resin, defoamer and polymerization inhibitor into the paint making tank, stir and mix at the speed of 700-800 rpm for 5-8 minutes to prepare the resin mixture.

Step B: Add the anti-sedimentation agent and titanium dioxide into the paint vat made of the resin mixture at a low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step C: Add zinc stearate and calcium carbonate into the paint-making tank at low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step D: Add the solvent and leveling agent into the paint tank at low speed, and stir at 1000-1200 rpm for 10-12 minutes.

The high-hardness unsaturated polyester white primer obtained in this example was tested and analyzed according to national standards GB-18581-2009 and GB/T23997-2009, and its properties are shown in Tables 1 and 2.

Example 3

A kind of high hardness unsaturated polyester white primer, it is made up of first component, cobalt isozincate, methyl ethyl ketone peroxide and diluent, the weight ratio of described first component, isozincate cobalt, methyl ethyl ketone peroxide is 100:1.5:1.7:30; the accelerator is cobalt isozincate (blue water), selected from Shanghai Changfeng Chemical EC-6F. The initiator is methyl ethyl ketone peroxide (white water), selected from Shanghai Changfeng Chemical Industry 808A.

The weight percentage of the said component A is composed of: Changxing 2307-S unsaturated polyester resin 42%, BYK057 defoamer 0.2%, BYK110 dispersant 0.2%, hydroquinone 0.1%, R-972 anti-sedimentation Agent 0.2%, R-706 titanium dioxide 10%, 1819 zinc stearate 5%, 1250 mesh calcium carbonate powder 40%, styrene 2.1%, BYK358N leveling agent 0.2%.

The weight percent of described diluent is composed of styrene 25%, ethyl ester 40%, toluene 35%.

The method for preparing the high-hardness unsaturated polyester white primer of this embodiment includes the preparation of component A and mixing component A, cobalt isozincate, methyl ethyl ketone peroxide, and diluent uniformly according to the dosage, and the preparation steps of component A as followed,

Step A: put the unsaturated polyester resin, defoamer and polymerization inhibitor into the paint making tank, stir and mix at the speed of 700-800 rpm for 5-8 minutes to prepare the resin mixture.

Step B: Add the anti-sedimentation agent and titanium dioxide into the paint vat made of the resin mixture at a low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step C: Add zinc stearate and calcium carbonate into the paint-making tank at low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step D: Add the solvent and leveling agent into the paint tank at low speed, and stir at 1000-1200 rpm for 10-12 minutes.

The high-hardness unsaturated polyester white primer obtained in this example was tested and analyzed according to national standards GB-18581-2009 and GB/T23997-2009, and its properties are shown in Tables 1 and 2.

Comparative example 1

PU white primer formula:

A PU white primer, which is composed of a component, a curing agent, and a diluent, and the weight ratio of the first component, the curing agent, and the diluent is 100:50:50. Wherein the weight percent of A component is composed of:

The curing agent is L-75 diluted with butyl ester to form a mixture with a solid content of 40%.

Described diluent comprises following raw material calculated by weight percentage:

Xylene: 60%

PMA: 20%

Ethyl ester: 20%

The sum of the above raw materials in the diluent is 100%.

The preparation method comprises the following preparation steps:

Step A: put the special alkyd resin for PU primer and the defoamer into the paint making tank, stir and mix at a speed of 700-800 rpm for 5-8 minutes to prepare the resin mixture.

Step B: Add the anti-sedimentation agent and titanium dioxide into the paint vat made of the resin mixture at a low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step C: Add zinc stearate and calcium carbonate into the paint-making tank at low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step D: Add toluene into the paint vat at low speed, and stir at 1000-1200 rpm for 10-12 minutes.

Step E: weigh and pack the above-prepared mixed solution as required.

Comparative example 2

NC White Primer Formula:

An NC white primer, which consists of component A and thinner, the weight ratio of component A and thinner is 100:150. Wherein the weight percent of A component is composed of

Described diluent comprises following raw material calculated by weight percentage:

Xylene: 60%

Cyclohexanone: 8%

n-Butanol: 12%

Ethyl ester: 20%

The sum of the above raw materials in the diluent is 100%.

The preparation method comprises the following preparation steps:

Step A: Put the special alkyd resin for the primer and the defoamer into the paint making tank, stir and mix at a speed of 700-800 rpm for 5-8 minutes to prepare the resin mixture.

Step B: Add the anti-sedimentation agent and titanium dioxide into the paint vat made of the resin mixture at a low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step C: Add zinc stearate and calcium carbonate into the paint-making tank at low speed, and stir at 2500-3500 rpm for 10-12 minutes.

Step D: Add nitrocellulose and ethyl ester into the paint tank at low speed, and stir at 1000-1200 rpm for 10-12 minutes.

Step E: weigh and pack the above-prepared mixed solution as required.

Table 1

Table 2

1. It can be seen from the above two tables that because PU polyurethane coatings and nitrocellulose coatings use a large amount of solvents such as benzene and esters, during construction, a large amount of solvents volatilize into the air, which easily pollutes the air, and PU Polyurethane coatings contain free TDI, which is harmful to the human body. The solvent used in unsaturated polyester coatings is styrene monomer, which participates in the reaction during the reaction process, making the solid content of the paint film close to 100%, and has little air pollution.

2. In the hardness standard requirements stipulated by the state, the hardness of nitro coatings is greater than or equal to B, the hardness of PU polyurethane coatings is greater than or equal to HB, and the hardness of PE unsaturated polyester coatings can reach 2H, far exceeding the hardness of nitro coatings. , The hardness of PU polyurethane coating.

3. One-time thick coating of PE unsaturated polyester paint can achieve the ideal paint film thickness, while polyurethane paint and nitrocellulose paint need to be sprayed several times to reach a certain paint film thickness.

4. The above-mentioned embodiments are only preferred embodiments of the present invention, and are not used to limit the scope of the present invention. Therefore, all equivalent changes or modifications made with the features and principles described in the claims of the present invention should include within the scope of the claims of the present invention.

Claims (3)

1. a high hardness unsaturated polyester white primer, is characterized in that: it is made up of first component, cobalt isooctanoate, methyl ethyl ketone peroxide and diluent, described first component, isooctanoate cobalt, methyl ethyl ketone peroxide , The weight ratio of diluent is 100:(0.8～2):(1～2.5):(30～40); The weight percent of said A component is: 38%-45% of air-drying unsaturated polyester resin, 0.1%-0.3% of defoamer, 0.1%-0.3% of dispersant, 0.1%-0.2% of polymerization inhibitor %, anti-settling agent 0.1%-0.5%, titanium dioxide 6%-10%, zinc stearate 3%-5%, calcium carbonate powder 40%-50%, solvent 2%-4.5%, leveling agent 0.1% ~0.3%, the sum of the above raw materials in component A is 100%; In the component A, the air-drying type unsaturated polyester resin has a viscosity of 1600-2000CPS and a solid content of 75%-83%; In the component A, the solvent is styrene, the defoamer is an acrylate defoamer; the leveling agent is an acrylate leveling agent; the anti-settling agent is fumed silica, and the polymerization inhibitor is hydroquinone. 2. The high-hardness unsaturated polyester white primer according to claim 1, characterized in that: the weight percent of the thinner is 20% to 40% of styrene and 20% to 40% of ethyl ester , Toluene 20% to 40%. 3. A method for preparing the high-hardness unsaturated polyester white primer described in claim 1 or 2, comprising the preparation of the first component and mixing the first component, cobalt isooctanoate, methyl ethyl ketone peroxide, thinner in proportion Uniform, characterized in that: the preparation steps of component A are as follows, A. Put the air-drying type unsaturated polyester resin, defoamer, and polymerization inhibitor into the paint making tank, and stir and mix at a speed of 700-800 rpm for 5-8 minutes to obtain a resin mixture; B. Add the anti-sedimentation agent and titanium dioxide into the paint vat made of resin mixture, and stir at 2500-3500 rpm for 10-12 minutes; C. Add zinc stearate and calcium carbonate into the paint making tank, and stir at 2500-3500 rpm for 10-12 minutes; D. Add solvent and leveling agent into the paint tank, and stir at 1000-1200 rpm for 10-12 minutes to obtain component A.