CN116139548A - Composite defoamer for water-based paint configuration and preparation method thereof - Google Patents

Abstract

The invention discloses a composite defoamer for water-based paint configuration, which comprises the following components in percentage by weight: 3.4 to 6.1 percent of metal soap, 0.1 to 0.47 percent of catalyst, 0.6 to 0.9 percent of solid dispersing agent, 1.7 to 4.2 percent of polyether glycol, 1.6 to 3 percent of polyether triol, 75.6 to 85.3 percent of industrial oil, 1 to 2.3 percent of emulsifier, 5 to 15 percent of defoaming auxiliary agent and the component of the defoaming auxiliary agent can well adjust the dispersion performance of the defoaming agent in the water-based paint, thereby facilitating the defoaming of the water-based paint by the defoaming agent, and therefore, according to the list, the first to third embodiments, as the ratio of the defoaming auxiliary agent increases, the density of the paint increases more and more, and the defoaming performance of the defoaming agent is improved by adding the defoaming auxiliary agent.

Description

Composite defoamer for water-based paint configuration and preparation method thereof

Technical Field

The invention relates to the field of paint production, in particular to a composite defoamer for water paint configuration and a preparation method thereof.

Background

The water-based paint defoamer is a compound product of organic polyether ester, mineral oil, polyether modified silicone oil and alcohol, does not generate surface defects or influence film forming property, has special effect on a water-based paint system, and rapidly develops after synthetic resin appears; the water-based paint not only uses the synthetic material to replace vegetable oil, improves the paint performance, but also solves the harm caused by solvent gas in paint construction; in addition, the rapid development of water-based paint is further promoted due to petroleum crisis, environmental pollution prevention and ecological protection.

The water-based paint is a system easy to foam, and at present, the water-based paint defoamer mainly comprises polyester esters, polyether modified silicone oil, alcohol compound and the like, and when the water-based paint is prepared, raw materials with higher oiliness such as mineral oil, industrial oil and the like are commonly used, the oiliness is high, the ratio is large, the dispersibility of the defoamer in the water-based paint is generally poor, and thus the defoaming capability of the defoamer on the water-based paint is reduced.

Disclosure of Invention

The invention aims to provide a composite defoamer for water-based paint configuration and a preparation method thereof, which are used for solving the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: a composite defoamer for water paint configuration comprises the following components in percentage by weight: 3.4 to 6.1 percent of metal soap, 0.1 to 0.47 percent of catalyst, 0.6 to 0.9 percent of solid dispersing agent, 1.7 to 4.2 percent of polyether glycol, 1.6 to 3 percent of polyether triol, 75.6 to 85.3 percent of industrial oil, 1 to 2.3 percent of emulsifier and 5 to 15 percent of defoaming auxiliary agent.

Preferably, the metal soap comprises potassium palmitate, zinc stearate, aluminum stearate, magnesium linoleate, calcium oleate.

Preferably, the molecular weight of the polyether glycol is 2000-3000, and the molecular weight of the polyether triol is 4000-6000; the solid dispersing agent is hydrophilic white carbon black or hydrophobic white carbon black.

Preferably, the defoaming auxiliary comprises polyether polyol and triisobutyl phosphate.

A preparation method of a composite defoamer for water-based paint configuration comprises the following steps:

step one: adding ethylene glycol, propylene oxide and potassium hydroxide into a reaction kettle, stirring and heating to 130 ℃, pressurizing to 0.9MPa, reacting for 12 hours, adding ethylene oxide, reacting for 6 hours under the conditions of 120 ℃ and 0.5MPa, aging for 3 hours at constant temperature, vacuumizing at 100 ℃ and a vacuum degree of-800 mmHg to obtain crude polyether glycol;

step two: adding oxalic acid into crude polyether glycol for neutralization, adding active carbon for decolorization, and performing filter pressing through a plate-and-frame filter press after decolorization to obtain polyether glycol;

step three: adding glycerol, propylene oxide and potassium hydroxide into a reaction kettle, stirring, heating, pressurizing and reacting for 12 hours; then adding ethylene oxide, reacting for 6 hours, and aging for 10 hours at constant temperature; vacuumizing to obtain crude polyether triol; adding oxalic acid into crude polyether triol for neutralization, adding active carbon for decolorization, and performing filter pressing under the condition of 0.2MPa by a plate-and-frame filter press after decolorization to obtain polyether triol;

step four: adding polyether polyol and triisobutyl phosphate into a reaction kettle, and stirring and mixing to obtain a defoaming auxiliary agent;

step five: adding alkyl benzene oil, zinc stearate, polyether glycol and polyether triol into a reaction kettle, introducing nitrogen into the kettle, and starting to heat the reaction kettle; heating to 120 ℃ and preserving heat for 3 hours; after the heat preservation is finished, continuously heating to 150 ℃ for heat preservation for 2 hours, and after the heat preservation is finished, cooling; cooling to 110-120 deg.c, adding hydrophilic white carbon black and defoaming assistant, and maintaining for 2 hr; cooling after heat preservation is finished, reducing the temperature to 60 ℃, and adding an emulsifier TX series and an emulsifier NP series; naturally cooling to normal temperature, and discharging after detection.

Compared with the prior art, the invention has the beneficial effects that: the defoaming auxiliary agent component can well adjust the dispersion performance of the defoaming agent in the water-based paint, thereby being beneficial to defoaming the water-based paint by the defoaming agent, so that according to the list, as the ratio of the defoaming auxiliary agent increases from the first embodiment to the third embodiment, the density of the paint is larger and larger, and the defoaming performance of the defoaming agent is improved by adding the defoaming auxiliary agent.

Detailed Description

The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

The invention provides a technical scheme that: a composite defoamer for water paint configuration comprises the following components in percentage by weight: 4% of metal soap, 0.3% of catalyst, 0.7% of solid dispersing agent, 2.5% of polyether glycol, 2% of polyether triol, 82.7% of industrial oil, 1.8% of emulsifying agent and 6% of defoaming auxiliary agent.

Preferably, the metal soap comprises potassium palmitate, zinc stearate, aluminum stearate, magnesium linoleate, calcium oleate.

Preferably, the molecular weight of the polyether glycol is 2000-3000, and the molecular weight of the polyether triol is 4000-6000; the solid dispersing agent is hydrophilic white carbon black or hydrophobic white carbon black.

Preferably, the defoaming auxiliary comprises polyether polyol and triisobutyl phosphate.

A preparation method of a composite defoamer for water-based paint configuration comprises the following steps:

step one: adding ethylene glycol, propylene oxide and potassium hydroxide into a reaction kettle, stirring and heating to 130 ℃, pressurizing to 0.9MPa, reacting for 12 hours, adding ethylene oxide, reacting for 6 hours under the conditions of 120 ℃ and 0.5MPa, aging for 3 hours at constant temperature, vacuumizing at 100 ℃ and a vacuum degree of-800 mmHg to obtain crude polyether glycol;

step two: adding oxalic acid into crude polyether glycol for neutralization, adding active carbon for decolorization, and performing filter pressing through a plate-and-frame filter press after decolorization to obtain polyether glycol;

step three: adding glycerol, propylene oxide and potassium hydroxide into a reaction kettle, stirring, heating, pressurizing and reacting for 12 hours; then adding ethylene oxide, reacting for 6 hours, and aging for 10 hours at constant temperature; vacuumizing to obtain crude polyether triol; adding oxalic acid into crude polyether triol for neutralization, adding active carbon for decolorization, and performing filter pressing under the condition of 0.2MPa by a plate-and-frame filter press after decolorization to obtain polyether triol;

step four: adding polyether polyol and triisobutyl phosphate into a reaction kettle, and stirring and mixing to obtain a defoaming auxiliary agent;

step five: adding alkyl benzene oil, zinc stearate, polyether glycol and polyether triol into a reaction kettle, introducing nitrogen into the kettle, and starting to heat the reaction kettle; heating to 120 ℃ and preserving heat for 3 hours; after the heat preservation is finished, continuously heating to 150 ℃ for heat preservation for 2 hours, and after the heat preservation is finished, cooling; cooling to 110-120 deg.c, adding hydrophilic white carbon black and defoaming assistant, and maintaining for 2 hr; cooling after heat preservation is finished, reducing the temperature to 60 ℃, and adding an emulsifier TX series and an emulsifier NP series; naturally cooling to normal temperature, and discharging after detection.

Example two

The invention provides a technical scheme that: a composite defoamer for water paint configuration comprises the following components in percentage by weight: 3% of metal soap, 0.3% of catalyst, 0.7% of solid dispersing agent, 2.5% of polyether glycol, 2% of polyether triol, 79.7% of industrial oil, 1.8% of emulsifying agent and 10% of defoaming auxiliary agent.

Preferably, the metal soap comprises potassium palmitate, zinc stearate, aluminum stearate, magnesium linoleate, calcium oleate.

Preferably, the molecular weight of the polyether glycol is 2000-3000, and the molecular weight of the polyether triol is 4000-6000; the solid dispersing agent is hydrophilic white carbon black or hydrophobic white carbon black.

Preferably, the defoaming auxiliary comprises polyether polyol and triisobutyl phosphate.

A preparation method of a composite defoamer for water-based paint configuration comprises the following steps:

step one: adding ethylene glycol, propylene oxide and potassium hydroxide into a reaction kettle, stirring and heating to 130 ℃, pressurizing to 0.9MPa, reacting for 12 hours, adding ethylene oxide, reacting for 6 hours under the conditions of 120 ℃ and 0.5MPa, aging for 3 hours at constant temperature, vacuumizing at 100 ℃ and a vacuum degree of-800 mmHg to obtain crude polyether glycol;

step two: adding oxalic acid into crude polyether glycol for neutralization, adding active carbon for decolorization, and performing filter pressing through a plate-and-frame filter press after decolorization to obtain polyether glycol;

step three: adding glycerol, propylene oxide and potassium hydroxide into a reaction kettle, stirring, heating, pressurizing and reacting for 12 hours; then adding ethylene oxide, reacting for 6 hours, and aging for 10 hours at constant temperature; vacuumizing to obtain crude polyether triol; adding oxalic acid into crude polyether triol for neutralization, adding active carbon for decolorization, and performing filter pressing under the condition of 0.2MPa by a plate-and-frame filter press after decolorization to obtain polyether triol;

step four: adding polyether polyol and triisobutyl phosphate into a reaction kettle, and stirring and mixing to obtain a defoaming auxiliary agent;

step five: adding alkyl benzene oil, zinc stearate, polyether glycol and polyether triol into a reaction kettle, introducing nitrogen into the kettle, and starting to heat the reaction kettle; heating to 120 ℃ and preserving heat for 3 hours; after the heat preservation is finished, continuously heating to 150 ℃ for heat preservation for 2 hours, and after the heat preservation is finished, cooling; cooling to 110-120 deg.c, adding hydrophilic white carbon black and defoaming assistant, and maintaining for 2 hr; cooling after heat preservation is finished, reducing the temperature to 60 ℃, and adding an emulsifier TX series and an emulsifier NP series; naturally cooling to normal temperature, and discharging after detection.

Example III

The invention provides a technical scheme that: a composite defoamer for water paint configuration comprises the following components in percentage by weight: 3% of metal soap, 0.3% of catalyst, 0.7% of solid dispersing agent, 2% of polyether glycol, 1.5% of polyether triol, 77.7% of industrial oil, 1.8% of emulsifying agent and 13% of defoaming auxiliary agent.

Preferably, the metal soap comprises potassium palmitate, zinc stearate, aluminum stearate, magnesium linoleate, calcium oleate.

Preferably, the molecular weight of the polyether glycol is 2000-3000, and the molecular weight of the polyether triol is 4000-6000; the solid dispersing agent is hydrophilic white carbon black or hydrophobic white carbon black.

Preferably, the defoaming auxiliary comprises polyether polyol and triisobutyl phosphate.

A preparation method of a composite defoamer for water-based paint configuration comprises the following steps:

step one: adding ethylene glycol, propylene oxide and potassium hydroxide into a reaction kettle, stirring and heating to 130 ℃, pressurizing to 0.9MPa, reacting for 12 hours, adding ethylene oxide, reacting for 6 hours under the conditions of 120 ℃ and 0.5MPa, aging for 3 hours at constant temperature, vacuumizing at 100 ℃ and a vacuum degree of-800 mmHg to obtain crude polyether glycol;

step two: adding oxalic acid into crude polyether glycol for neutralization, adding active carbon for decolorization, and performing filter pressing through a plate-and-frame filter press after decolorization to obtain polyether glycol;

step three: adding glycerol, propylene oxide and potassium hydroxide into a reaction kettle, stirring, heating, pressurizing and reacting for 12 hours; then adding ethylene oxide, reacting for 6 hours, and aging for 10 hours at constant temperature; vacuumizing to obtain crude polyether triol; adding oxalic acid into crude polyether triol for neutralization, adding active carbon for decolorization, and performing filter pressing under the condition of 0.2MPa by a plate-and-frame filter press after decolorization to obtain polyether triol;

step four: adding polyether polyol and triisobutyl phosphate into a reaction kettle, and stirring and mixing to obtain a defoaming auxiliary agent;

step five: adding alkyl benzene oil, zinc stearate, polyether glycol and polyether triol into a reaction kettle, introducing nitrogen into the kettle, and starting to heat the reaction kettle; heating to 120 ℃ and preserving heat for 3 hours; after the heat preservation is finished, continuously heating to 150 ℃ for heat preservation for 2 hours, and after the heat preservation is finished, cooling; cooling to 110-120 deg.c, adding hydrophilic white carbon black and defoaming assistant, and maintaining for 2 hr; cooling after heat preservation is finished, reducing the temperature to 60 ℃, and adding an emulsifier TX series and an emulsifier NP series; naturally cooling to normal temperature, and discharging after detection.

Experimental items	Coating density (20 ℃ C.) g/cm3
		Example 1	0.89
Example two	0.91
		Example III	0.92

Through experiments on the good-custom examples, a data list is obtained, in the practical situation, the smaller the bubble amount in the paint is, the larger the paint density is, and the defoaming auxiliary component can well adjust the dispersion performance of the defoaming agent in the water paint, so that the defoaming agent is helpful for defoaming the water paint, and according to the list, the first to third examples are shown, the density of the paint is larger and larger along with the increase of the ratio of the defoaming auxiliary, and therefore, the defoaming performance of the defoaming agent is improved by adding the defoaming auxiliary.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The composite defoamer for water paint configuration is characterized by comprising the following components in percentage by weight: 3.4 to 6.1 percent of metal soap, 0.1 to 0.47 percent of catalyst, 0.6 to 0.9 percent of solid dispersing agent, 1.7 to 4.2 percent of polyether glycol, 1.6 to 3 percent of polyether triol, 75.6 to 85.3 percent of industrial oil, 1 to 2.3 percent of emulsifier and 5 to 15 percent of defoaming auxiliary agent.

2. The composite defoamer for aqueous paint formulation of claim 1, wherein the metal soap comprises potassium palmitate, zinc stearate, aluminum stearate, magnesium linoleate, and calcium oleate.

3. The composite defoamer for water paint formulation of claim 1, wherein the molecular weight of the polyether glycol is 2000-3000 and the molecular weight of the polyether triol is 4000-6000; the solid dispersing agent is hydrophilic white carbon black or hydrophobic white carbon black.

4. The composite defoamer for water paint formulation of claim 1, wherein the defoamer aid comprises polyether polyol and triisobutyl phosphate.

5. A method of making a composite defoamer for aqueous paint formulation as claimed in claims 1 to 4, comprising the steps of:

step one: adding ethylene glycol, propylene oxide and potassium hydroxide into a reaction kettle, stirring and heating to 130 ℃, pressurizing to 0.9MPa, reacting for 12 hours, adding ethylene oxide, reacting for 6 hours under the conditions of 120 ℃ and 0.5MPa, aging for 3 hours at constant temperature, vacuumizing at 100 ℃ and a vacuum degree of-800 mmHg to obtain crude polyether glycol;

step two: adding oxalic acid into crude polyether glycol for neutralization, adding active carbon for decolorization, and performing filter pressing through a plate-and-frame filter press after decolorization to obtain polyether glycol;

step three: adding glycerol, propylene oxide and potassium hydroxide into a reaction kettle, stirring, heating, pressurizing and reacting for 12 hours; then adding ethylene oxide, reacting for 6 hours, and aging for 10 hours at constant temperature; vacuumizing to obtain crude polyether triol; adding oxalic acid into crude polyether triol for neutralization, adding active carbon for decolorization, and performing filter pressing under the condition of 0.2MPa by a plate-and-frame filter press after decolorization to obtain polyether triol;

step four: adding polyether polyol and triisobutyl phosphate into a reaction kettle, and stirring and mixing to obtain a defoaming auxiliary agent;

step five: adding alkyl benzene oil, zinc stearate, polyether glycol and polyether triol into a reaction kettle, introducing nitrogen into the kettle, and starting to heat the reaction kettle; heating to 120 ℃ and preserving heat for 3 hours; after the heat preservation is finished, continuously heating to 150 ℃ for heat preservation for 2 hours, and after the heat preservation is finished, cooling; cooling to 110-120 deg.c, adding hydrophilic white carbon black and defoaming assistant, and maintaining for 2 hr; cooling after heat preservation is finished, reducing the temperature to 60 ℃, and adding an emulsifier TX series and an emulsifier NP series; naturally cooling to normal temperature, and discharging after detection.