阅读说明：本技术 一种修补用丙烯酸集装箱面漆及其制备方法 (Acrylic container finish paint for repairing and preparation method thereof ) 是由 李永强 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种修补用丙烯酸集装箱面漆及制备方法,面漆包括以下组分：有机硅改性丙烯酸树脂替代传统的丙烯酸树脂,增加整个涂层的疏水性；BCS溶剂的使用可以将进入涂层的水分快速溶解,便于3A分子筛的吸附,3A分子筛的引入将进入体系的水分吸附住,减少水与树脂接触；选用硅含量在60%以上的滑石粉为主填料替代常规的硫酸钡,提高疏水性；选用氯含量在70%以上氯化石蜡搭配二甲苯甲醛树脂,代替普通的氯化石蜡52提高疏水性。(The invention discloses a finish paint for a repairing acrylic container and a preparation method thereof, wherein the finish paint comprises the following components: the organic silicon modified acrylic resin replaces the traditional acrylic resin, so that the hydrophobicity of the whole coating is increased; the BCS solvent can be used for quickly dissolving moisture entering the coating, so that the adsorption of the 3A molecular sieve is facilitated, the moisture entering the system is adsorbed by introducing the 3A molecular sieve, and the contact of water and resin is reduced; talc powder with silicon content of more than 60% is selected as a main filler to replace conventional barium sulfate, so that hydrophobicity is improved; the chlorinated paraffin with chlorine content over 70% is matched with xylene formaldehyde resin to replace common chlorinated paraffin 52 to raise hydrophobicity.)

1. The acrylic container finish paint for repairing is characterized by comprising the following raw material components in percentage by mass:

40.0 to 50.0 percent of organic silicon modified acrylic resin

Polyacrylate dispersant 1.0-2.5%

1.5 to 2.0 percent of organic bentonite

Xylene 15.0-20.0%

BCS solvent 3.0-5.0%

5.0-8.0% of 3A molecular sieve

10.0 to 15.0 percent of 800-mesh talcum powder

Pigment 8.0-15.0%

703.0-5.0% of chlorinated paraffin

Xylene formaldehyde resin 1.0-2.5%

1.5 to 3.0 percent of polyamide wax slurry;

the silicon content of the 800-mesh talcum powder is more than 60%, and the chlorine content of the chlorinated paraffin is more than 70%.

2. The method for preparing a refinishable acrylic container finish according to claim 1, comprising the steps of:

step 1) adding organic silicon modified hydroxy acrylic resin, polyacrylate dispersant, xylene and BCS solvent into a feeding tank, and adding organic bentonite under stirring;

step 2) adding a 3A molecular sieve, 800-mesh talcum powder, pigment and 70 parts of chlorinated paraffin under a stirring state;

step 3), adding polyamide wax slurry and continuing stirring;

and 4) adding xylene formaldehyde resin and stirring until stirring is finished.

3. The method for preparing a refinishable acrylic container finish according to claim 2, wherein the method comprises the following steps: the stirring speed in the step 1) is 300-500 r/min.

4. The method for preparing a refinishable acrylic container finish according to claim 2, wherein the method comprises the following steps: the rotating speed in the step 2) is 600-800r/min, the stirring is carried out for 10-15min, and the grinding fineness of the sand mill is not more than 30 u.

5. The method for preparing a refinishable acrylic container finish according to claim 2, wherein the method comprises the following steps: the rotating speed in the step 3) is 800-.

6. The method for preparing a refinishable acrylic container finish according to claim 2, wherein the method comprises the following steps: the stirring speed in the step 4) is 10-15min, and the rotation speed is 300-500 r/min.

Technical Field

The invention relates to the field of coatings, in particular to a finish paint for a repairable acrylic container and a preparation method thereof.

Background

Under the promotion of national environmental protection requirements, the water-based container coating is basically realized, the box discharging speed is increased from 100TU to 160TU in a single shift along with the improvement of field technology and the increase of the proficiency of workers, certain moisture still exists in a paint film although a film is formed on the surface when boxes arrive at a stacking factory in many times, the water-based paint cannot be repaired due to technological reasons, and the water-based paint is usually whitened due to the existence of moisture after being repaired, has obvious color difference and is not attractive, so that the water-based container coating is a problem commonly existing in many box factories at present.

Disclosure of Invention

In order to solve the problems, the invention discloses acrylic container finish paint for repairing and a preparation method thereof, which effectively solve the problems of whitening of the surface of a container and color difference.

The technical scheme of the invention is as follows: the acrylic container finish paint for repairing comprises the following raw material components in percentage by mass:

40.0 to 50.0 percent of organic silicon modified acrylic resin

Polyacrylate dispersant 1.0-2.5%

1.5 to 2.0 percent of organic bentonite

Xylene 15.0-20.0%

BCS solvent 3.0-5.0%

5.0-8.0% of 3A molecular sieve

10.0 to 15.0 percent of 800-mesh talcum powder

Pigment 8.0-15.0%

703.0-5.0% of chlorinated paraffin

Xylene formaldehyde resin 1.0-2.5%

1.5 to 3.0 percent of polyamide wax slurry;

the silicon content of the 800-mesh talcum powder is more than 60 percent, and the chlorine content of the chlorinated paraffin is more than 70 percent.

A preparation method of acrylic acid container finish paint for repairing comprises the following steps:

step 1) adding organic silicon modified hydroxy acrylic resin, polyacrylate dispersant, xylene and BCS solvent into a feeding tank, and adding organic bentonite under stirring;

step 2) adding a 3A molecular sieve, 800-mesh talcum powder, pigment and 70 parts of chlorinated paraffin under a stirring state;

step 3), adding polyamide wax slurry and continuing stirring;

and 4) adding xylene formaldehyde resin and stirring until stirring is finished.

Wherein the stirring speed in the step 1) is 300-500 r/min.

Wherein the rotating speed in the step 2) is 600-800r/min, the stirring is carried out for 10-15min, and the grinding fineness of the sand mill is not more than 30 u.

Wherein the rotating speed in the step 3) is 800-1000r/min, and the stirring is carried out for 10-15 min.

Wherein the stirring speed in the step 4) is 10-15min, and the rotation speed is 300-500 r/min.

The invention has the advantages that: the organic silicon modified acrylic resin replaces the traditional acrylic resin, so that the hydrophobicity of the whole coating is increased, the water resistance is improved, and the phenomenon that the coating turns white when meeting water is effectively reduced; the BCS solvent can be used for quickly dissolving moisture entering the coating, so that the 3A molecular sieve can be conveniently adsorbed, the moisture entering a system is adsorbed by introducing the 3A molecular sieve, the contact of water and resin is reduced, and the problem that the coating turns white when meeting water can be effectively solved; talc powder with silicon content of more than 60% is selected as a main filler to replace conventional barium sulfate, so that hydrophobicity is improved; the chlorinated paraffin with chlorine content over 70% is matched with xylene formaldehyde resin to replace common chlorinated paraffin 52 to raise hydrophobicity.

Detailed Description

For the purpose of enhancing the understanding of the present invention, the following description is given in conjunction with the embodiments of the present invention, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.

Example 1

The acrylic acid container finish paint for repairing comprises the following components in percentage by mass:

35.0 percent of organic silicon modified acrylic resin,

1 percent of polyurethane dispersant,

1.5 percent of organic bentonite,

19 percent of dimethylbenzene,

4.0 percent of BCS solvent,

7.0 percent of 3A molecular sieve,

11.0 percent of 800-mesh talcum powder,

13.5 percent of pigment,

704.0 percent of chlorinated paraffin,

2.0 percent of dimethylbenzene formaldehyde resin,

2.0% of polyamide wax slurry;

a preparation method of acrylic acid container finish paint for repairing comprises the following steps:

step 1: adding organic silicon modified acrylic resin, a polyurethane dispersant, dimethylbenzene and a BCS solvent into a feeding tank, adding bentonite under stirring, and rotating at 300 r/min;

step 2: adding 3A molecular sieve, 800 mesh talcum powder, pigment and chlorinated paraffin under stirring at 70 rotation speed of 600r/min, stirring for 10min, and grinding to fineness of 40u by a sand mill;

and step 3: adding polyamide wax slurry, stirring at 8000r/min for 10 min;

and 4, step 4: adding xylene formaldehyde resin and stirring for 10min at the rotating speed of 300 r/min.

Example 2

The acrylic acid container finish paint for repairing comprises the following components in percentage by mass:

40.0 percent of organic silicon modified acrylic resin,

1.0 percent of polyurethane dispersant,

1.5 percent of organic bentonite,

15.0 percent of dimethylbenzene,

5.0 percent of BCS solvent,

6.0 percent of 3A molecular sieve,

12.5 percent of 800-mesh talcum powder,

12.0 percent of pigment is added,

704.0 percent of chlorinated paraffin,

1.5 percent of dimethylbenzene formaldehyde resin,

1.5% of polyamide wax slurry;

a preparation method of acrylic acid container finish paint for repairing comprises the following steps:

step 1: adding organic silicon modified acrylic resin, a polyurethane dispersant, dimethylbenzene and a BCS solvent into a feeding tank, adding bentonite under stirring, and rotating at 500 r/min;

step 2: adding 3A molecular sieve, 800 mesh talcum powder, pigment and chlorinated paraffin under stirring at 70 rotation speed of 800r/min, stirring for 15min, and grinding to fineness of 40u by a sand mill;

and step 3: adding polyamide wax slurry, stirring at the rotation speed of 1000r/min for 15 min;

and 4, step 4: adding xylene formaldehyde resin, and stirring at 500r/min for 15 min.

Example 3

The acrylic acid container finish paint for repairing comprises the following components in percentage by mass:

45.0 percent of organic silicon modified acrylic resin,

1.0 percent of polyurethane dispersant,

2.0 percent of organic bentonite,

15.5 percent of dimethylbenzene,

3.5 percent of BCS solvent,

5.0 percent of 3A molecular sieve,

10.0 percent of 800-mesh talcum powder,

10.0 percent of pigment,

705.0 percent of chlorinated paraffin,

1.5 percent of dimethylbenzene formaldehyde resin,

1.5 percent of polyamide wax slurry,

a preparation method of acrylic acid container finish paint for repairing comprises the following steps:

step 1: adding organic silicon modified acrylic resin, a polyurethane dispersant, dimethylbenzene and a BCS solvent into a feeding tank, adding bentonite under stirring, and rotating at 400 r/min;

step 2: adding 3A molecular sieve, 800 mesh talcum powder, pigment and chlorinated paraffin under stirring at a rotation speed of 700r/min, stirring for 13min, and grinding to a fineness of 40u by a sand mill;

and step 3: adding polyamide wax slurry, stirring at the rotation speed of 900r/min for 13 min;

and 4, step 4: adding xylene formaldehyde resin and stirring for 13min at the rotating speed of 400 r/min.

Comparative example 1

The common acrylic acid container finish paint comprises the following components in percentage by mass:

45.0 percent of common acrylic resin,

0.5 percent of polyurethane dispersant,

1.0 percent of organic bentonite,

16.5 percent of dimethylbenzene,

15.0 percent of precipitated barium sulfate,

15.0 percent of pigment,

52 to 15.0 percent of chlorinated paraffin,

2.0 percent of polyamide wax slurry,

a preparation method of acrylic acid container finish paint for repairing comprises the following steps:

step 1: adding common acrylic resin, a polyurethane dispersant and dimethylbenzene into a feeding tank, adding bentonite under stirring, and rotating at 500 r/min;

step 2: adding precipitated barium sulfate and pigment at a rotating speed of 800r/min under stirring, stirring for 15min, and grinding to obtain a fineness of 40u by a sand mill;

and step 3: adding polyamide wax slurry, stirring at the rotation speed of 1000r/min for 15 min;

and 4, step 4: adding 52-1 parts of chlorinated paraffin, stirring for 10min at the rotating speed of 400 r/min.

Comparative example 2

The common acrylic acid container finish paint comprises the following components in percentage by mass:

38.0 percent of common acrylic resin,

1.0 percent of polyurethane dispersant,

2.0 percent of organic bentonite,

23.0 percent of dimethylbenzene,

15.0 percent of precipitated barium sulfate,

15.0 percent of pigment,

52 to 14.0 percent of chlorinated paraffin

2.0 percent of polyamide wax slurry,

a preparation method of acrylic acid container finish paint for repairing comprises the following steps:

step 1: adding common acrylic resin, a polyurethane dispersant and dimethylbenzene into a feeding tank, adding bentonite under stirring, and rotating at 500 r/min;

step 2: adding precipitated barium sulfate and pigment at a rotating speed of 800r/min under stirring, stirring for 15min, and grinding to obtain a fineness of 40u by a sand mill;

and step 3: adding polyamide wax slurry, stirring at the rotation speed of 1000r/min for 15 min;

and 4, step 4: adding 52-1 parts of chlorinated paraffin, stirring for 10min at the rotating speed of 400 r/min.

Preparing water-based acrylic finish paint, coating the examples and the comparative examples after touch drying, comparing the color change condition and the color difference after drying, and comparing the specific data:

as can be seen from the table, after the finish paint is used, the surface of the container has no obvious color change after the finish paint is applied to the container and dried, and the comparative example has obvious color change, so that the acrylic container finish paint for repairing can avoid the phenomena of whitening and obvious unattractive color difference.