CN103788832A - Water-based ship anticorrosive paint and preparation process thereof - Google Patents

Abstract

The invention discloses a water-based anti-corrosion paint formula and a preparation process thereof. The paint is composed of the following components in mass percentage, water 5-25%, dispersant 0.5-1.5%, surfactant 0.1-0.2%, disinfectant Foaming agent 0.4-1.5%, ethylene glycol 0.8-4%, rust inhibitor 10%-20%, emulsion 40-70%, polyurethane thickener 0.8-1.5%, film-forming aid 1-2.5%. The preparation process of the coating is to put dispersant, surfactant, defoamer, ethylene glycol, antirust agent, emulsion, polyurethane thickener, and film-forming aid into the water in sequence, and stir each material evenly. Add another material, stir while feeding, and check the viscosity after the dispersion is uniform. The coating prepared by this formula and process has long-lasting anti-rust and anti-corrosion properties, and has the advantages of good water resistance, impact resistance, sea water resistance, abrasion resistance and alkali resistance, and is suitable for splash areas and Anti-corrosion underwater.

Description

A kind of water-based ship anticorrosion coating and preparation technology thereof

technical field

The invention relates to the field of anti-corrosion coatings, in particular to a water-based anti-corrosion coating used in the field of ships and a preparation process thereof.

Background technique

Ships are exposed to severe corrosion due to long-term exposure to high-salinity marine environments. Corrosion can not only reduce the strength of ship steel structures and shorten the life of ships, but also increase navigation resistance, reduce speed, and affect ship performance and navigation safety. It is not uncommon for corrosion to cause structural damage and destruction, loss of property and even life. It can be said that ship corrosion is one of the biggest factors affecting its life. Corrosion damage or fracture not only causes the leakage of harmful substances and pollutes the environment, but also sometimes causes sudden catastrophic accidents and endangers human safety. For ships, anti-corrosion and anti-rust have always been a global problem that plagues people. Relevant data show that the annual corrosion loss in my country reaches at least hundreds of billions of yuan. Therefore, the anti-corrosion work of ships is urgent. At present, the anti-corrosion of ships generally applies ship paint on the hull and bottom of the ship to block the contact between seawater and ships, but the current ship paint film is not dense enough, waterproof and impermeable, poor adhesion, sea water resistance, and impact resistance. Waiting for the question.

Contents of the invention

In order to solve the above problems, the present invention provides a water-based ship anticorrosion coating and a preparation process thereof.

In order to achieve the above object, the technical solution adopted in the present invention is:

A water-based anti-corrosion coating for ships, which consists of the following components by mass percentage: 30%-50% of bisphenol A/F epoxy emulsion; 30%-55% of deionized water; 0.8%-4% of oligomeric polyester polyol %; anti-rust pigment 10% to 20%; toluene diisocyanate 0.8% to 1.5%; chain extender 1% to 2.5%; modified epoxy propylene acid resin 1% to 2.5%; dispersant (polycarboxylic acid Sodium salt) 0.5%~1.5%; Alkylamino alcohol (surfactant) 0.1%~0.2%; Defoamer 0.4%~1.5%; Coalescing agent 5%~25%; Dimethylol propionic acid 5 %~25%.

Preferably, in order to improve the film density of the paint, the chain extender is a mixture of diethylaminoethanol and trimethylolpropionic acid.

Preferably, the defoamer is a mixture of organosiloxane and mineral oil.

Preferably, in order to improve the waterproof and anti-penetration ability of the coating film of the paint, the antirust agent is titanium iron powder.

Preferably, the emulsion is bisphenol A/F epoxy emulsion.

A kind of preparation technology of water-based ship anticorrosion paint, comprises the following steps:

(1) prepare a clean container, drop into emulsion and deionized water by mass percentage;

(2) Put oligomeric polyester polyol and toluene diisocyanate (TDI) into the emulsion in step (1), stir at low speed to make it react, and the stirring speed is 100r/min;

(3) Add a mixture of diethylaminoethanol and trimethylolpropionic acid while stirring, and introduce dimethylolpropionic acid (DMPA) as a hydrophilic group after stirring at a low speed, and place it at 80-100°C after stirring Reaction 1 ~ 4h;

(4) drop into modified glycidic acid resin in the solution of step (3), stir evenly, add modified glycidic acid resin to make the storage period of the emulsion exceed 10 months, and the freeze-thaw cycle is more than 5 times, The hardness of the coated film pendulum exceeds 0.7, the tensile strength is greater than 10MPa, and the water resistance, acid and alkali resistance, solvent resistance and corrosion resistance are significantly improved compared with unmodified ones;

(5) drop into the alkylaminated alcohol in the solution of step (4) and stir;

(6) drop into the mixture of organosiloxane and mineral oil in step (5) solution and stir;

(7) drop into polycarboxylate sodium salt and stir in step (6) solution;

(8) drop into ferrotitanium powder and evenly stir in step (7) solution in 30min;

(9) In step (8), add film-forming aids into the solution and stir, so that the film-forming aids are evenly distributed in the solution. After the dispersion is uniform, the viscosity is 100-105 KU.

Preferably, the stirring is performed while feeding in each step.

The beneficial effects of the present invention are:

1. The present invention uses bisphenol A/F epoxy resin emulsion as the main film-forming material, which has excellent adhesion, impact resistance, abrasion resistance and seawater resistance;

2. In the present invention, the storage period of the emulsion exceeds 10 months by adding modified glycidic acid resin, the freeze-thaw cycle resistance exceeds 5 times, the hardness of the pendulum of the coating film exceeds 0.7, the tensile strength is greater than 10MPa, water resistance, and Acid-base, solvent resistance and corrosion resistance are significantly improved compared with unmodified.

3. The present invention uses oligomeric polyester polyols and toluene diisocyanate (TDI) to react, uses chain extenders to carry out small molecule chain extension, and uses dimethylol propionic acid (DMPA) to introduce hydrophilic groups, which can improve the stability of the paint resistance, water resistance and physical properties.

4. The present invention is widely applicable, and can be used in splash zones and underwater anti-corrosion of ships and offshore platforms.

Detailed ways

The present invention relates to a preparation process of a water-based marine anti-corrosion coating. The present invention will be described in detail below in conjunction with specific examples. The following examples and descriptions are only used to explain the present invention, but not as a limitation of the present invention.

Embodiment one:

Equipped with 100kg of the water-based ship anticorrosion coating of the present invention, which is formulated by the following weight components:

Bisphenol A/F type epoxy emulsion 35g, deionized water 35.4g, oligomeric polyester polyol 0.8g, titanium iron powder 10g, toluene diisocyanate 0.8g, chain extender 1g, modified epoxypropylene Acid resin 1 g, dispersant (polycarboxylate sodium salt) 0.5 g, alkylaminated alcohol (surfactant) 0.1 g, defoamer 0.4 g, film-forming aid 5 g, dimethylol propionic acid 10 g.

Preferably, the chain extender is a mixture of 0.5g diethylaminoethanol and 0.5g trimethylolpropionic acid.

Preferably, the defoamer is a mixture of 0.3g organosiloxane and 0.1g mineral oil.

A kind of preparation technology of water-based ship anticorrosion paint, comprises the following steps:

(1) Prepare a clean container, put in 35g of bisphenol A/F epoxy emulsion and 35.4g of deionized water, and stir evenly;

(2) Put 0.8 g of oligomeric polyester polyol and 0.8 g of toluene diisocyanate (TDI) into the emulsion of step (1), stir at a low speed to make it react, and the stirring speed is 100r/min;

(3) Add a mixture of 0.5g diethylaminoethanol and 0.5g trimethylolpropionic acid while stirring, and introduce 10g dimethylolpropionic acid (DMPA) after stirring at a low speed as a hydrophilic group. React at 80-100°C for 1-4 hours;

(4) Put 1 g of modified glycidic acid resin into the solution in step (3), stir evenly, add modified glycidic acid resin to make the storage period of the emulsion exceed 10 months, and the freeze-thaw cycle is more than 5 Second, the hardness of the coating pendulum exceeds 0.7, the tensile strength is greater than 10MPa, and the water resistance, acid and alkali resistance, solvent resistance and corrosion resistance are significantly improved compared with unmodified ones;

(5) drop into 0.1 g of alkaneamino alcohol in step (4) solution and stir;

(6) Add a mixture of 0.3g organosiloxane and 0.1g mineral oil to the solution in step (5) and stir;

(7) drop into 0.5 g polycarboxylate sodium salt in step (6) solution and stir;

(8) drop into 10 g ferrotitanium powder in stages within 30min in step (7) solution and stir evenly;

(9) Put 5 g of film-forming aid into the solution in step (8) and stir, so that the film-forming aid is evenly distributed in the solution. After the dispersion is uniform, the viscosity is 100-105 KU.

Preferably, the stirring is performed while feeding in each step.

Example 2:

Equipped with 1000kg of the water-based ship anticorrosion coating of the present invention, which is formulated by the following weight components:

Bisphenol A/F type epoxy emulsion 300g, deionized water 400g, oligomeric polyester polyol 10g, titanium iron powder 110g, toluene diisocyanate 10g, chain extender 10g, modified glycidic acid Resin 20 g, dispersant (polycarboxylate sodium salt) 15 g, alkylaminated alcohol (surfactant) 2 g, defoamer 15 g, film-forming aid 55 g, dimethylol propionic acid 53 g.

Preferably, the chain extender is a mixture of 8g of diethylaminoethanol and 2g of trimethylolpropionic acid.

Preferably, the defoamer is a mixture of 5 g of organosiloxane and 10 g of mineral oil.

A kind of preparation technology of water-based ship anticorrosion paint, comprises the following steps:

(1) Prepare a clean container, put in 300g of bisphenol A/F epoxy emulsion and 400g of deionized water, and stir evenly;

(2) Put 10 g of oligomeric polyester polyol and 10 g of toluene diisocyanate (TDI) into the emulsion in step (1), stir at a low speed to make it react, and the stirring speed is 100r/min;

(3) Add a mixture of 8g diethylaminoethanol and 2g trimethylolpropionic acid while stirring, and introduce 53g dimethylolpropionic acid (DMPA) after stirring at a low speed as a hydrophilic group, and place it at 80 ~ Reaction at 100°C for 1 to 4 hours;

(4) Put 20 g of modified glycidic acid resin into the solution in step (3), stir evenly, add modified glycidic acid resin to make the storage period of the emulsion exceed 10 months, and the freeze-thaw cycle is more than 5 Second, the hardness of the coating pendulum exceeds 0.7, the tensile strength is greater than 10MPa, and the water resistance, acid and alkali resistance, solvent resistance and corrosion resistance are significantly improved compared with unmodified ones;

(5) drop into 2 g of alkaneamino alcohols in step (4) solution and stir;

(6) drop into the mixture of 5g organosiloxane and 10g mineral oil in step (5) solution and stir;

(7) drop into 15 g polycarboxylate sodium salt and stir in step (6) solution;

(8) drop into 110 g ferrotitanium powder in stages within 30min in step (7) solution and stir evenly;

(9) Put 55 g of film-forming aid into the solution in step (8) and stir, so that the film-forming aid is evenly distributed in the solution, and after the dispersion is uniform, the detection viscosity is 100-105 KU.

Preferably, the stirring is performed while feeding in each step.

The above embodiments are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and modifications made by ordinary engineers and technicians in the field to the technical solutions of the present invention Improvements should all fall within the scope of protection determined by the claims of the present invention.

Claims (7)

1. a water-based boats and ships protective system, is characterized in that, composed of the following components by mass percentage:

Dihydroxyphenyl propane/F type epoxy emulsion: 30%～50%;

Deionized water: 30%～55%;

Oligomeric polyester polyvalent alcohol: 0.8%～4%;

Rust-stabilising pigment: 10%～20%;

Tolylene diisocyanate: 0.8%～1.5%;

Chainextender: 1%～2.5%;

The bright sour resin of modified epoxy third: 1%～2.5%;

Dispersion agent (polycarboxylate sodium): 0.5%～1.5%

Alkylamino alcohol (tensio-active agent): 0.1%～0.2%;

Defoamer: 0.4%～1.5%;

Film coalescence aid 5%～25%;

Dimethylol propionic acid 5%～25%.

2. a kind of water-based boats and ships protective system according to claim 1, is characterized in that: described chainextender is the mixture of diethylaminoethanol and trishydroxymethyl propionic acid.

3. a kind of water-based boats and ships protective system according to claim 1, is characterized in that: described defoamer is the mixture of organo-siloxane and mineral oil.

4. a kind of water-based boats and ships protective system according to claim 1, is characterized in that: described rust-preventive agent is titanium-iron powder.

5. a kind of water-based boats and ships protective system according to claim 1, is characterized in that: described emulsion is dihydroxyphenyl propane/F type epoxy emulsion.

6. a preparation technology for water-based boats and ships protective system, is characterized in that, comprises the following steps:

(1) prepare clean container, drop into by mass percentage emulsion and deionized water;

(2) in step (1) emulsion, drop into oligomeric polyester polyvalent alcohol and tolylene diisocyanate (TDI), stirring at low speed is reacted it, and stirring velocity is 100r/min;

(3) in the time stirring, add the mixture of diethylaminoethanol and trishydroxymethyl propionic acid, the dimethylol propionic acid of introducing after stirring at low speed (DMPA), as hydrophilic radical, stirs to be placed in 80～100 ℃ and reacts 1～4h;

(4) drop into the bright sour resin of modified epoxy third at step (3) solution; uniform stirring; add the bright sour resin of modified epoxy third to make emulsion exceed 10 months storage period; freeze-thawing resistant circulation exceedes 5 times; film pendulum-rocker hardness exceedes 0.7; tensile strength is greater than 10MPa, and water tolerance, resistance to acids and bases, solvent resistance and preservative property are all significantly improved than unmodified;

(5) drop into alkylamino alcohol and stir at step (4) solution;

(6) drop into the mixture of organo-siloxane and mineral oil and stir at step (5) solution;

(7) drop into polycarboxylate sodium and stir at step (6) solution;

(8) in 30min, drop into stage by stage titanium-iron powder uniform stirring at step (7) solution;

(9) drop into film coalescence aid and stir at step (8) solution, film coalescence aid is evenly distributed in solution, after being uniformly dispersed, detecting viscosity is 100-105KU.

7. the preparation technology of a kind of water-based boats and ships protective system as claimed in claim 6, is characterized in that, described stirring is to stir when each step feeds intake.