CN1130203A

CN1130203A - Aqueous epoxy phenolic paint and its preparing method

Info

Publication number: CN1130203A
Application number: CN 95117439
Authority: CN
Inventors: 王茂华
Original assignee: HUAYIKANG SEALING COATING MATERIAL FACTORY BEIJING
Current assignee: HUAYIKANG SEALING COATING MATERIAL FACTORY BEIJING
Priority date: 1995-11-09
Filing date: 1995-11-09
Publication date: 1996-09-04

Abstract

The invented paint is made from phnolic resin, aqueous epoxy resin and water, the so-called phenolic resin is made from phenol, formol and dimethyl amino alcohol, the so-called aqueous epoxy resin is made from epoxy resin, methyl methacrylate, styrene, benzoyl peroxide, dimethyl amino alcohol, phosporic acid and water. Said invention features decreasing drain of organic solvent, low danger of exploding and fire, low energy consumption, saving organic solvent and specially suitable for iron can.

Description

A kind of aqueous epoxy phenolic paint and preparation method thereof

The present invention relates to coating, particularly a kind of aqueous epoxy phenolic paint.

The purposes of coating is very extensive, and coating type is also very various.But existing coating mostly is organic solvent type greatly as being used for canned coating.In the canned food Application Areas, coating commonly used is the organic solvent type epoxy-phenol resin paint, and the shortcoming that this coating exists is:

1, sticking power and impact resistance are poor, can not satisfy jar requirement of special system;

2, use range is single, and different food has different requirements for anticorrosion to can liner;

3, the volatilization of solvent causes serious topsoil, to making many applying units be ordered to move factory;

4, set off an explosion and fire dangerous big;

5, because the volatilization of solvent, the serious harm health of human body.

The purpose of this invention is to provide a kind of aqueous epoxy phenolic paint, this coating has been avoided the above-mentioned defective of prior art.

Coating of the present invention contains resol, aqueous epoxy resins and water.The preferred weight proportioning is: resol 10-20%, aqueous epoxy resins 30-40%, water 40-60%.

Wherein resol is preferably made by phenol, formaldehyde, dimethylaminoethanol and water, and the preferred weight proportioning is: phenol 37-50%, the formalin 47-60% of 35-38%, dimethylaminoethanol 3-5%.

Described aqueous epoxy resins is preferably made by Resins, epoxy, methyl methacrylate, butyl acrylate, vinylformic acid, vinylbenzene, benzoyl peroxide, dimethylaminoethanol, phosphoric acid, ring ethyl ketone, propyl carbinol, ethylene glycol monobutyl ether and water.The preferred weight proportioning is Resins, epoxy: 25-30%, methyl methacrylate 0.5-1%, butyl acrylate: 1-1.5%, vinylformic acid 1-1.5%, vinylbenzene 1-1.5%, benzoyl peroxide 0.3-0.7%, dimethylaminoethanol 1-2%, the phosphate aqueous solution 0.2-0.5% of 80-90%, pimelinketone 8-10%, propyl carbinol 10-20%, ethylene glycol monobutyl ether 5-10% and water 37-50%

The preparation method of coating of the present invention preferably includes following step:

1, preparation resol:

Phenol, formalin and dimethylaminoethanol are added in the reactor, be warming up to 75-80 ℃ and react;

2, preparation aqueous epoxy resins:

(1) with pimelinketone, propyl carbinol, ethylene glycol monobutyl ether dissolved epoxy, temperature is 80-95 ℃, until complete molten be transparent liquid;

(2) give oxidation: benzoyl peroxide is dissolved in the pimelinketone, adds then in step (1) the gained liquid, react;

(3) Acrylic Acid Monomer is mixed the adding benzoyl peroxide, add then in step (2) the gained solution, react;

(4) append benzoyl peroxide: remaining benzoyl peroxide is dissolved in the pimelinketone, adds then in step (3) the gained solution, react;

(5) phosphorylation: the mixed solution of phosphoric acid and ethylene glycol monobutyl ether is added in step (4) the gained solution, react;

(6) neutralization dilution: the mixed solution of water and dimethylaminoethanol is added in step (5) the gained solution.

3, finished product preparation:

After above-mentioned resol that makes and aqueous epoxy resins mixing, add the entry dilution, making solid content is 33-35% (wt).

In this step, the methylol in the resol and the hydroxyl in the Resins, epoxy, hydroxyl and epoxy reaction, reaction formula is:

Phenolic hydroxyl group in the resol and epoxy group(ing) effect, reaction formula is:

The advantage of coating of the present invention is as follows:

1, filmogen homodisperse or be dissolved in the water by different way, dry or solidify after paint film have good good water tolerance, higher luminance brightness and other good physicals;

2, reduce the discharging of organic solvent, help the healthy of environment protection and workmen;

3, blast and fire is dangerous little;

4, by the spontaneous evaporation of water, the total energy consumption of the comparable organic solvent type coating of energy consumption hangs down 25%;

5, the equipment of Shi Yonging can wash by water;

6, coating per ton can be saved organic solvent 200-400 kilogram.

Further specify the present invention below by embodiment.

Embodiment

Prepare coating of the present invention by following step:

1, preparation resol:

Weight proportion: the formalin 52% of phenol 44%, 37%, dimethylaminoethanol 4%.

Preparation process: described raw material is under agitation mixed the adding reactor, be warming up to 78 ℃, isothermal reaction 2 hours is cooled to 45 ℃ of blowings, and is standby;

2, preparation aqueous epoxy resins:

Weight proportion: high molecular expoxy resin 27%, methyl methacrylate 0.7%, butyl acrylate 1.3%, vinylformic acid 1.3%, vinylbenzene 1.3% benzoyl peroxide 0.5%, dimethylaminoethanol 1.5%, 85% phosphate aqueous solution 0.4%, distilled water 40%, pimelinketone 9%, propyl carbinol 10%, ethylene glycol monobutyl ether 7%

Preparation process:

(1) with pimelinketone, propyl carbinol, ethylene glycol monobutyl ether dissolved epoxy, temperature is 80-95 ℃, to complete molten during for transparent liquid only;

(2) an amount of benzoyl peroxide is dissolved in the pimelinketone, splashes in step (1) the gained solution isothermal reaction 35 minutes at 85-95 ℃ (preferred 90 ℃);

(3) Acrylic Acid Monomer is mixed an amount of benzoyl peroxide of adding, splash in step (2) the gained solution isothermal reaction 2 hours in 85-95 ℃ (preferred 90 ℃);

(4) remaining benzoyl peroxide is dissolved in the pimelinketone, splashes in step (3) the gained solution isothermal reaction 1 hour in 85-95 ℃ (preferred 90 ℃);

(5) step (4) gained solution is warming up to 110-125 ℃ (preferred 120 ℃), drips phosphoric acid and ethylene glycol monobutyl ether mixed solution, and in 120 ℃ of reactions 2 hours;

(6) step (5) gained solution is cooled to 90 ℃, and the mixed solution of distilled water and dimethylaminoethanol is splashed under the violent stirring situation, and (its viscosity are regulated in specific conductivity＜20, and are standby to use an amount of pure water again;

3, preparation finished product:

Weight proportion: step 1 gained resol 15%, step 2 gained aqueous epoxy resins 35%, distilled water 50%.

Preparation process: after aqueous epoxy resins and resol stirred, add the pure water dilution of specific conductivity＜20, regulate after its solids content is 34%, barrelling gets product.

This coating is specially adapted to coating iron flask head.

Claims

1, a kind of aqueous epoxy phenolic paint is characterized in that containing resol, aqueous epoxy resins and water.

2, coating as claimed in claim 1 is characterized in that weight proportion is resol 10-20%, aqueous epoxy resins 30-40%, water 40-60%.

3,, it is characterized in that described resol made by phenol, formaldehyde, dimethylaminoethanol and water as the coating of claim 1 or 2.

4, coating as claimed in claim 3 is characterized in that weight proportion is phenol 37-50%, the formalin 47-60% of 35-38%, dimethylaminoethanol 3-5%.

5,, it is characterized in that described aqueous epoxy resins made by Resins, epoxy, methyl methacrylate, butyl acrylate, vinylformic acid, vinylbenzene, benzoyl peroxide, dimethylaminoethanol, phosphoric acid, pimelinketone, propyl carbinol, ethylene glycol monobutyl ether and water as the coating of claim 1 or 2.

6, coating as claimed in claim 5, it is characterized in that weight proportion is Resins, epoxy 25-30%, methyl methacrylate 0.5-1%, butyl acrylate 1-1.5%, vinylformic acid 1-1.5%, vinylbenzene 1-1.5%, benzoyl peroxide 0.3-0.7%, dimethylaminoethanol 1-2%, the phosphate aqueous solution 0.2-0.5% of 80-90%, pimelinketone 8-10%, propyl carbinol 10-20%, second=alcohol is butyl ether 5-10% and water 37-50% solely.

7, a kind of preparation method of the coating as one of claim 1 to 6 is characterized in that comprising the steps:

(1). preparation resol;

(2). the preparation aqueous epoxy resins;

(3). the finished product preparation.

8, method as claimed in claim 7 is characterized in that described step 1 for phenol, formalin and dimethylaminoethanol are added in the reactor, and being warming up to 75-80 ℃ reacts;

Described step 2 comprises the steps:

(2) benzoyl peroxide is dissolved in the pimelinketone, adds then in step (1) the gained liquid, react;

(4) remaining benzoyl peroxide is dissolved in the pimelinketone, adds then in step (3) the gained solution, react;

(5) mixed solution with phosphoric acid and ethylene glycol monobutyl ether adds in step (4) the gained solution, reacts;

(6) mixed solution with pure water and dimethylaminoethanol adds in step (5) the gained solution;

Described step 3 adds the pure water dilution for after above-mentioned resol that makes and the aqueous epoxy resins mixing, and making solid content is 33-35% (wt).

9, method as claimed in claim 8 is characterized in that described step (2), (3), (4), (5), (6) operate in the dropping mode.

10, method as claimed in claim 8, the temperature of reaction that it is characterized in that described step (2), (3), (4) is 85-95 ℃, the temperature of reaction of step (5) is 110-125 ℃; Step (2) reaction times is more than 35 minutes; The reaction times of step (3) is more than 2 hours; The reaction times of step (4) is more than 1 hour; The reaction times of step (5) is more than 2 hours.