CN108047927B - A kind of quick-drying water-resistant type aqueous polyurethane woodenware lacquer and preparation method thereof - Google Patents
A kind of quick-drying water-resistant type aqueous polyurethane woodenware lacquer and preparation method thereof Download PDFInfo
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- CN108047927B CN108047927B CN201711478902.6A CN201711478902A CN108047927B CN 108047927 B CN108047927 B CN 108047927B CN 201711478902 A CN201711478902 A CN 201711478902A CN 108047927 B CN108047927 B CN 108047927B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/69—Polymers of conjugated dienes
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention belongs to water-borne wood coating technical fields, and in particular to a kind of quick-drying water-resistant type aqueous polyurethane woodenware lacquer and preparation method thereof.The aqueous polyurethane woodenware lacquer includes the raw material of following parts by weight meter: 100 parts of aqueous polyurethane dispersion, 0.1~1 part of levelling agent, 0.1~1 part of wetting agent, 6~9 parts of coalescing agent and 3~6 parts of 3- methyl-1-butanol.The rate of drying of aqueous polyurethane woodenware lacquer of the present invention is fast, the paint film of formation is smooth plentiful, smooth, the defects of without shrinkage cavity, bubble, glossiness is high, adhesion is good, hardness is high, with excellent water resistance and good impact resistance, heat-resisting, color inhibition, solvent resistant and resistance to acid and alkali, it can be used for the woodwork coatings such as furniture, floor.
Description
Technical field
The invention belongs to water-borne wood coating technical fields, and in particular to a kind of quick-drying water-resistant type aqueous polyurethane woodenware is clear
Paint and preparation method thereof.
Background technique
Compared with solvent wood coatings, water-borne wood coating is a kind of environment-friendly type coating using water as decentralized medium, tool
Have the advantages that it is non-ignitable, nontoxic, without containing a large amount of volatile organic matters, with incomparable in terms of economizing on resources and protect environment
Superiority.Currently, as domestic air quality deteriorates, haze is increasingly although domestic woodwork coating is still based on solvent type
Seriously, country has put into effect tightened up environmental protection policy, and stringent control is proposed to the production and consumption of solvent based coating, right
Coating proposes environmental protection, health, the requirements at the higher level of secure context.
Currently, water-borne wood coating mainly includes aqueous alkide resin, aqueous NC Nitroncellulose, aqueous epoxy resins, water
Property acrylic resin and aqueous polyurethane coating and acrylic acid-polyurethane water-base resin coating.
The unique physicochemical properties that aqueous polyurethane has due to its special structure, it is such as soft or hard adjustable, wear-resisting
Property is good, adhesion strength is strong etc., so that high-performance is widely used with aqueous polyurethane coating both with low VOC content.It is aqueous
Polyurethane coating can be divided into waterborne two-component polyurethane coating and water-borne PU dispersion coatings by filming performance.Bi-component water
Property polyurethane coating be made of the water-base resin of hydroxyl and the crosslinking agent containing-NCO base, the two mixed before construction equal
Even, film forming procedure is different from solvent-based system, and film forming initial stage is physical dryness process, with the evaporation of moisture, dispersion or cream
Liquid particles cohesion, the counterdiffusion of polymer chain phase and crosslinks reaction, and paint film property is good, with preferable water resistance, solvent resistant
Performance etc..The major defect of waterborne two-component polyurethane coating is that curing agent reacts the various by-products of generation with water, causes paint film
The forfeiture of crosslinking ability, the shortening of pot-life and bubble formation, cause paint film it is unglazed and reduce paint film physical and chemical performance,
So wet adhesion property, solvent resistance, scratch resistance, in terms of there is still a need for improvement.And aqueous polyurethane dispersion
Coating is one-component coating, and Water-borne modification mainly passes through emulsifier or introduces hydrophilic radical on the main chain of polymer, belongs to heat
Plastic resin, Polymer Molecular Weight is larger, is moisture evaporation in film forming procedure into environment, meets environmental requirement,
Have the advantages that facilitate construction, but the water resistance of monocomponent waterborne polyurethane coating, wearability, to the wettability of ground, at
This etc. limits its development.And pass through the cross-linking modified mechanical performance that water-borne PU dispersion coatings can be improved and chemically-resistant
Moral character energy, but the modification of aqueous polyurethane will lead to the raising of production cost.
Currently, being mostly focused on main body tree on how to optimize the experimental study of water-borne PU dispersion coatings performance
The modification of rouge aqueous polyurethane, and often ignore influence of the coating additive for aqueous polyurethane.It is applied with common solvent type
Material is different, and water paint is a more complicated system, not only to be paid close attention in component design the type of polymer, lotion and
The performance of dispersion, it is also necessary to reasonably select various auxiliary agents and in view of influencing each other between each ingredient.
Since the surface tension of water is very high, thus the surface tension of water paint and evaporation latent heat are high, this makes aqueous painting
Expect in addition to rate of drying, to timber in terms of it is different from solvent based coating other than, in coating and reality
It is easier to occur moistening that bad, levelling is bad, shrinkage cavity, depression and the problems such as cissing in coating process.So being applied in aqueous wooden ware
In the formula system of material, surfactant using essential.Currently, being normal mostly in water-borne wood coating industrial application
Advise surfactant, such as polyether modified siloxane etc..The surface-active of siloxane type surfactants is strong, can be effectively reduced
The surface tension of aqueous coating system, to reach, substrate is wet and equality purpose is stayed in flowing.But this kind of surfactant tool
There is very strong foam stabilizing to be inclined to, however bubble is to influence one of product quality and the major defect of paint film appearance.In order to eliminate because
Air bubble problem caused by using siloxane type surfactants would have to the defoaming agent strong using defoaming, such as polyethers
Type defoaming agent, but strength defoaming agent then can bring new problem, such as poor compatibility of the defoaming agent in system again, will affect
Glossiness, the transparency and performance of paint film etc..In addition, since water paint is using water as decentralized medium, if temperature is lower than -5 DEG C
When, water paint will freeze, or even scrap, and cause damages, so the transport and storage of water paint require to carry out heat preservation
Measure, which also limits the popularizations of water paint.
Summary of the invention
In order to solve the problems in the existing technology (slow drying speed of such as existing aqueous polyurethane coating, it is water-fast, cold
Storage stability is poor, because the use of the surfactants such as wetting agent, levelling agent causes paint film to have the defects of bubble, shrinkage cavity), this hair
Bright to provide a kind of quick-drying water-resistant type aqueous polyurethane woodenware lacquer, the resin based on aqueous polyurethane is closed by compounding
Suitable auxiliary agent, improves the cold and hot storage stability of varnish, and improves the rate of drying and water resistance of paint film, solves simultaneously
It has determined the problem for causing paint film to have bubble, shrinkage cavity etc. because of the use of the surfactants such as wetting agent, levelling agent.
A kind of quick-drying water-resistant type aqueous polyurethane woodenware lacquer provided by the invention, the raw material including following parts by weight meter:
100 parts of aqueous polyurethane dispersion, 0.1~1 part of levelling agent, 0.1~1 part of wetting agent, 6~9 parts of coalescing agent and 3- methyl-1-
3~6 parts of butanol；
Specifically, the aqueous polyurethane dispersion is made by the following method:
A1,11~13 parts by weight of isophorone diisocyanate and 10.5~12.5 parts by weight of polybutadiene diol are put into
In reaction kettle, temperature is maintained at 60~75 DEG C, instills 0.001~0.003 parts by weight of organic tin catalyst, it is warming up to 80~
100 DEG C, insulation reaction 2~3 hours；
A2,40~60 DEG C are cooled to, alcohols chain extender and 6~9 parts by weight of acetone is added, be warming up to 70~80 DEG C, reflux
Insulation reaction 1~1.5 hour, continuously add 1.5~2.0 parts by weight of dihydroxy half ester, insulation reaction 1 hour；
A3,40 DEG C are cooled to, 1.0~1.5 parts by weight of triethylamine is added, stirred 20~30 minutes, reaction solution is made；
A4, it is cooled to room temperature, deionized water, which is added, makes the solid content 32~36% of reaction solution, is dispersed with stirring, and decompression is steamed
Except acetone, aqueous polyurethane dispersion is made.
Preferably, the levelling agent is in polyether modified silicon oil, Siloxane-Oxyalkylene Copolymers and dimethyl silicone polymer
At least one.
Preferably, the wetting agent is ethoxylated alkyl ammonium sulfate, laureth sodium sulfovinate and octylphenol polyethylene
At least one of ethylene oxide ether.
Preferably, the coalescing agent is the composition of triethylene glycol monomethyl ether and propylene glycol methyl ether acetate, or is three
The composition of ethylene glycol monoethyl ether and propylene glycol methyl ether acetate.It is furthermore preferred that the triethylene glycol monomethyl ether and propylene glycol first
The weight ratio of ether acetate is (2~3): 1, the weight ratio of the Triethylene glycol ethyl ether and propylene glycol methyl ether acetate be (2~
3):1。
Preferably, the alcohols chain extender is 1,4-butanediol or 1,3-PD；The additional amount of the alcohols chain extender
For 3.2~3.8 parts by weight.
Preferably, the organic tin catalyst is dibutyl tin dilaurate.
Correspondingly, the present invention also provides the preparation methods of the quick-drying water-resistant type aqueous polyurethane woodenware lacquer, specifically
The following steps are included:
S1,11~13 parts by weight of isophorone diisocyanate and 10.5~12.5 parts by weight of polybutadiene diol are put into
In reaction kettle, temperature is maintained at 60~75 DEG C, instills 0.001~0.003 parts by weight of organic tin catalyst, it is warming up to 80~
100 DEG C, insulation reaction 2~3 hours；
S2,40~60 DEG C are cooled to, alcohols chain extender and 6~9 parts by weight of acetone is added, be warming up to 70~80 DEG C, reflux
Insulation reaction 1~1.5 hour, continuously add 1.5~2.0 parts by weight of dihydroxy half ester, insulation reaction 1 hour；
S3,40 DEG C are cooled to, 1.0~1.5 parts by weight of triethylamine is added, stirred 20~30 minutes, reaction solution is made；
S4, it is cooled to room temperature, deionized water, which is added, makes the solid content 32~36% of reaction solution, is dispersed with stirring, and decompression is steamed
Except acetone, aqueous polyurethane dispersion is made；
6~9 parts by weight of coalescing agent and 3- methyl-1-butanol 3 is added in S5,100 parts by weight of aqueous dispersions of polyurethanes
~6 parts by weight, stirring 5~after ten minutes, addition 0.1~1 parts by weight of levelling agent and 0.1~1 parts by weight of wetting agent, stirring 5~
10 minutes, the use of ammonia water conditioning system pH value is 8.0~9.0, quick-drying water-resistant type aqueous polyurethane woodenware lacquer is made.
Further, the alcohols chain extender is 1,4-butanediol or 1,3-PD；The addition of the alcohols chain extender
Amount is 3.2~3.8 parts by weight.
Further, the organic tin catalyst is dibutyl tin dilaurate.
After the present invention synthesizes performed polymer under catalysis using isophorone diisocyanate and polybutadiene diol, alcohol is added
Class chain extender and anionic hydrophilic chain extender dihydroxy half ester carry out chain extension, are neutralized into salt after chain extension, finally plus water, make
Polyurethane can self-emulsifying in water, obtain anion-type water-thinned polyurethane dispersion.Add toward aqueous polyurethane dispersion obtained
Enter suitable silicone levelling agent and wetting agent, the substrate wetting of coating, ductility, permeability, enhancing attachment can be improved
Power, but the surfactants such as levelling agent and wetting agent have the function of foam stabilizing, blistering, have seriously affected product quality and paint film
Quality.
Low-carbon alcohols have certain defoaming effect, but in aqueous coating system, defoaming effect is not shown when dosage is low
It writes, dosage height can then reduce paint film property, and the present invention uses excessive alcohols chain extender in aqueous polyurethane dispersion, tool
Body is glycol chain extender, and one side can make polyurethane reaction system promptly carry out chain extension and crosslinking, on the other hand swim
From dihydric alcohol and 3- methyl-1-butanol cooperate, play significant defoaming, foam-inhibiting effect.Meanwhile after paint film is dry, 3- first
Base-n-butyl alcohol forms fine and close and hydrophobic membrane structure, hydrone is effectively prevent to enter in conjunction with the aqueous polyurethane dispersion
It invades, substantially increases the water resistance of paint film.Also, based on the molecular structure and property of 3- methyl-1-butanol, in drying process
In in conjunction with the aqueous polyurethane dispersion, improve paint film it is dry when squeeze hydrone speed, effectively shorten drying time.
Coalescing agent is called coalescent, cosolvent, and the present invention uses high boiling triethylene glycol monomethyl ether or three second two
For the composition of alcohol list ether and low boiling point propylene glycol methyl ether acetate as coalescing agent, on the one hand which can optimize paint film film forming
On the other hand temperature, rate of drying and water resistance are coordinated with dihydric alcohol, 3- methyl-1-butanol equal solvent, so that varnish body
Be that the balance of hydrophilic and oleophilic reaches preferable level, improve the cold and hot storage stability of varnish, do not freeze at -5 DEG C, gelatinization,
Layering etc. can save a series of Insulation when transporting storage.In addition, each auxiliary agent is coordinated, in the case where pH value is 8.0~9.0,
So that aqueous polyurethane woodenware lacquer stable system of the present invention, transparent clear.
Therefore, compared with prior art, present invention has an advantage that
(1) aqueous polyurethane woodenware lacquer appearance transparent of the present invention is limpid, bubble-free, and VOC content is low, stable system, protects
The matter phase is long, has good cold and hot storage stability, not muddy under high temperature, layering, gelatinization, do not freeze when -5 DEG C, without it is muddy,
Layering, gelatinization etc. are abnormal, can save a series of Insulation when transporting storage, ensure that good application property.
(2) rate of drying of aqueous polyurethane woodenware lacquer of the present invention is fast, and the paint film of formation is smooth plentiful, smooth, no contracting
The defects of hole, bubble, glossiness is high, adhesion is good, hardness is high, have excellent water resistance and good impact resistance, it is heat-resisting,
Color inhibition, solvent resistant and resistance to acid and alkali meet or even are significantly better than national standard " GB/T 23999-2009 indoor decorating
With water-borne wood coating " requirement, can be used for the woodwork coatings such as furniture, floor.
(3) aqueous polyurethane woodenware lacquer formula of the present invention is simple, and production cost is low, and stable preparation process, condition is controllable,
Can industrialized production, have a good application prospect.
Specific embodiment
The present invention is further described below by way of specific embodiment, the present invention is not limited only to following embodiment.In this hair
In bright range or the contents of the present invention are not being departed from, in spirit and scope, the change that carries out to the present invention is combined or replaced
It changes, will be apparent to the person skilled in the art, and be included within the scope of the present invention.
Embodiment 1, quick-drying water-resistant type aqueous polyurethane woodenware lacquer of the present invention and its preparation
Formula: aqueous polyurethane dispersion 100kg, polyether modified silicon oil 0.1kg, laureth sodium sulfovinate 0.1kg,
Coalescing agent 6kg and 3- methyl-1-butanol 3kg；
The coalescing agent is composed of triethylene glycol monomethyl ether and propylene glycol methyl ether acetate by weight 2:1.
Preparation method: S1, putting into isophorone diisocyanate 11kg and polybutadiene diol 10.5kg in reaction kettle,
Temperature is maintained at 60 DEG C, instills dibutyl tin dilaurate 0.001kg, is warming up to 80 DEG C, insulation reaction 2 hours；
S2,40 DEG C are cooled to, 1,4-butanediol 3.2kg and acetone 6kg is added, be warming up to 70 DEG C, reflux insulation reaction 1 is small
When, continuously add dihydroxy half ester 1.5kg, insulation reaction 1 hour；
S3,40 DEG C are cooled to, triethylamine 1.0kg is added, stirred 20 minutes, reaction solution is made；
S4, it is cooled to room temperature, deionized water, which is added, makes the solid content 32% of reaction solution, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
Coalescing agent 6kg and 3- methyl-1-butanol 3kg is added in S5, aqueous dispersions of polyurethanes 100kg, stirs 5 points
Polyether modified silicon oil 0.1kg and laureth sodium sulfovinate 0.1kg is added in Zhong Hou, stirs 5 minutes, uses ammonia water conditioning system
PH value is 8.0, and quick-drying water-resistant type aqueous polyurethane woodenware lacquer is made.
Embodiment 2, quick-drying water-resistant type aqueous polyurethane woodenware lacquer of the present invention and its preparation
Formula: aqueous polyurethane dispersion 100kg, dimethyl silicone polymer 1kg, ethoxylated alkyl ammonium sulfate 1kg, at
Film auxiliary agent 9kg and 3- methyl-1-butanol 6kg；
The coalescing agent is composed of triethylene glycol monomethyl ether and propylene glycol methyl ether acetate by weight 3:1.
Preparation method: S1, putting into isophorone diisocyanate 13kg and polybutadiene diol 12.5kg in reaction kettle,
Temperature is maintained at 75 DEG C, instills dibutyl tin dilaurate 0.003kg, is warming up to 100 DEG C, insulation reaction 3 hours；
S2,60 DEG C are cooled to, 1,3-PD 3.8kg and acetone 9kg is added, be warming up to 80 DEG C, flow back insulation reaction 1.5
Hour, continuously add dihydroxy half ester 2.0kg, insulation reaction 1 hour；
S3,40 DEG C are cooled to, triethylamine 1.5kg is added, stirred 30 minutes, reaction solution is made；
S4, it is cooled to room temperature, deionized water, which is added, makes the solid content 36% of reaction solution, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
Coalescing agent 9kg and 3- methyl-1-butanol 5kg is added in S5, aqueous dispersions of polyurethanes 100kg, stirs 10 points
Dimethyl silicone polymer 1kg and ethoxylated alkyl ammonium sulfate 1kg is added in Zhong Hou, stirs 10 minutes, uses ammonia water conditioning system
PH value is 9.0, and quick-drying water-resistant type aqueous polyurethane woodenware lacquer is made.
Embodiment 3, quick-drying water-resistant type aqueous polyurethane woodenware lacquer of the present invention and its preparation
Formula: aqueous polyurethane dispersion 100kg, Siloxane-Oxyalkylene Copolymers 0.6kg, octyl phenol polyoxyethylene ether
0.4kg, coalescing agent 8kg and 3- methyl-1-butanol 5kg；
The coalescing agent is composed of Triethylene glycol ethyl ether and propylene glycol methyl ether acetate by weight 2:1.
Preparation method: S1, putting into isophorone diisocyanate 12kg and polybutadiene diol 11.5kg in reaction kettle,
Temperature is maintained at 70 DEG C, instills dibutyl tin dilaurate 0.002kg, is warming up to 90 DEG C, insulation reaction 2 hours；
S2,50 DEG C are cooled to, 1,4-butanediol 3.5kg and acetone 8kg is added, be warming up to 75 DEG C, reflux insulation reaction 1 is small
When, continuously add dihydroxy half ester 1.8kg, insulation reaction 1 hour；
S3,40 DEG C are cooled to, triethylamine 1.2kg is added, stirred 25 minutes, reaction solution is made；
S4, it is cooled to room temperature, deionized water, which is added, makes the solid content 34% of reaction solution, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
Coalescing agent 8kg and 3- methyl-1-butanol 5kg is added in S5, aqueous dispersions of polyurethanes 100kg, stirs 10 points
Siloxane-Oxyalkylene Copolymers 0.6kg and octyl phenol polyoxyethylene ether 0.4kg is added in Zhong Hou, stirs 10 minutes, is adjusted using ammonium hydroxide
System pH is 8.5, and quick-drying water-resistant type aqueous polyurethane woodenware lacquer is made.
Embodiment 4, quick-drying water-resistant type aqueous polyurethane woodenware lacquer of the present invention and its preparation
Formula: aqueous polyurethane dispersion 100kg, Siloxane-Oxyalkylene Copolymers 0.3kg, laureth sodium sulfovinate
0.7kg, coalescing agent 7kg and 3- methyl-1-butanol 4kg；
The coalescing agent is composed of Triethylene glycol ethyl ether and propylene glycol methyl ether acetate by weight 3:1.
Preparation method: S1, putting into isophorone diisocyanate 12kg and polybutadiene diol 11.5kg in reaction kettle,
Temperature is maintained at 65 DEG C, instills dibutyl tin dilaurate 0.003kg, is warming up to 100 DEG C, insulation reaction 2 hours；
S2,60 DEG C are cooled to, 1,4-butanediol 3.6kg and acetone 7kg is added, be warming up to 80 DEG C, reflux insulation reaction 1 is small
When, continuously add dihydroxy half ester 2.0kg, insulation reaction 1 hour；
S3,40 DEG C are cooled to, triethylamine 1.3kg is added, stirred 20 minutes, reaction solution is made；
S4, it is cooled to room temperature, deionized water, which is added, makes the solid content 35% of reaction solution, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
Coalescing agent 7kg and 3- methyl-1-butanol 4kg, stirring is added in S5,100 parts by weight of aqueous dispersions of polyurethanes
After five minutes, Siloxane-Oxyalkylene Copolymers 0.3kg and laureth sodium sulfovinate 0.7kg is added, stirs 10 minutes, uses ammonia
Water regulation system pH value is 8.5, and quick-drying water-resistant type aqueous polyurethane woodenware lacquer is made.
The performance detection of test example one, quick-drying water-resistant type aqueous polyurethane woodenware lacquer of the present invention
As seen from the above table:
1) aqueous polyurethane woodenware lacquer appearance transparent of the present invention, limpid, bubble-free, VOC content is low, stable system, surely
Bubble property is poor, has good cold and hot storage stability, stores 30 days under the conditions of high temperature (55 ± 2) DEG C, no muddy, layering, glue
The abnormal conditions such as change；It stores 15 days, does not freeze at low temperature (- 5 ± 2) DEG C, keep mobility, and without muddiness, layering, gelatinization etc.
Abnormal conditions；Long shelf-life was up to 2 years under field conditions (factors).
2) rate of drying of aqueous polyurethane woodenware lacquer of the present invention is fast, surface drying within 15min, do solid work 50min with
It is interior；The defects of paint film of formation is smooth plentiful, smooth, no shrinkage cavity, bubble, glossiness is high, adhesion is good, hardness is high, has excellent
Different water resistance and good impact resistance, heat-resisting, color inhibition, solvent resistant and resistance to acid and alkali, meet or even are significantly better than country
The requirement of standard " GB/T 23999-2009 indoor decorating water-borne wood coating ", can be used for the coatings such as furniture, floor.
The influence of test example two, each raw material type and dosage to quick-drying water-resistant type aqueous polyurethane woodenware lacquer performance
Comparative example 1: compared with Example 3, the difference of this comparative example is only that: the dosage of 1,4-butanediol is changed by 3.5kg
For 2.5kg.
Comparative example 2: compared with Example 3, the difference of this comparative example is only that: the dosage of 1,4-butanediol is changed by 3.5kg
For 4.4kg.
Comparative example 3: compared with Example 3, the difference of this comparative example is only that: be used only Triethylene glycol ethyl ether be used as at
Film auxiliary agent, dosage are constant.
Comparative example 4: compared with Example 3, the difference of this comparative example is only that: propylene glycol methyl ether acetate conduct is used only
Coalescing agent, dosage are constant.
Comparative example 5: compared with Example 3, the difference of this comparative example is only that: the dosage of coalescing agent is changed to by 8kg
The dosage of 10kg, 3- methyl-1-butanol 5kg are changed to 7kg by 5kg.
Comparative example 6: compared with Example 3, the difference of this comparative example is only that: the use of ammonia water conditioning system pH value being 9.5.
Comparative example 7: compared with Example 3, the difference of this comparative example is only that: measurement system pH is 7.2, does not use ammonia
Water adjusts pH value.
As seen from the above table: change the type or dosage of raw material of the present invention, or changes certain parameter in preparation method, it is obtained
Varnish compared with the present invention, there is different degrees of decline with paint film property.
Comparative example 8~12: compared with Example 3, the difference of each comparative example is only that: respectively using isobutanol, neopentane,
Tert-pentyl alcohol, 2-methyl-1-butene alcohol, 5- methyl-1-hexanol replace 3- methyl-1-butanol.
As seen from the above table:
1) after the 3- methyl-1-butanol in the present invention being replaced with neopentane (comparative example 9) or tert-pentyl alcohol (comparative example 10),
The performances such as drying time, water resistance, adhesive force and storage stability without significant change, but its coating system show it is very strong
Foam stability brings a large amount of shrinkage cavities, bubble to surface of the paint film, thus it is speculated that due to the hydrophobic side of neopentane and tert-pentyl alcohol likeness in form umbellate form, energy
Fine and close and hydrophobic membrane structure is formed, brings excellent rate of drying and water resistance, but simultaneously, fine and close structure makes again in this way
Bubble in the system of obtaining can not be discharged, and lead to have a large amount of bubbles in coating system and paint film.
2) the 3- methyl-1-butanol in the present invention is replaced with into isobutanol (comparative example 8) or (comparison of 2-methyl-1-butene alcohol
Example 11) after, rate of drying and defoaming are without significant change, but paint film adhesion declines, and water resistance and storage stability are bright
It is aobvious to be deteriorated；And the 3- methyl-1-butanol in the present invention is replaced with into the then drying time increasing of 5- methyl-1-hexanol (comparative example 12)
Adding, adhesive force, water resistance and storage stability are obviously deteriorated, the molecular structure and property based on 3- methyl-1-butanol is prompted,
It is cooperateed with each component of the present invention, can effectively shorten paint film drying time, the cold and hot storage for improving paint film water resistance and varnish is steady
The performances such as qualitative.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (6)
1. a kind of quick-drying water-resistant type aqueous polyurethane woodenware lacquer, which is characterized in that the raw material including following parts by weight meter: aqueous
100 parts of dispersions of polyurethanes, 0.1~1 part of levelling agent, 0.1~1 part of wetting agent, 6~9 parts of coalescing agent and 3- methyl-1-butanol
3~6 parts；
The aqueous polyurethane dispersion is made by the following method:
A1,11~13 parts by weight of isophorone diisocyanate and 10.5~12.5 parts by weight of polybutadiene diol investment are reacted
In kettle, temperature is maintained at 60~75 DEG C, instills 0.001~0.003 parts by weight of organic tin catalyst, is warming up to 80~100 DEG C,
Insulation reaction 2~3 hours；
A2,40~60 DEG C are cooled to, alcohols chain extender and 6~9 parts by weight of acetone is added, be warming up to 70~80 DEG C, reflux heat preservation
Reaction 1~1.5 hour, continuously adds 1.5~2.0 parts by weight of dihydroxy half ester, and insulation reaction 1 hour；
A3,40 DEG C are cooled to, 1.0~1.5 parts by weight of triethylamine is added, stirred 20~30 minutes, reaction solution is made；
A4, it is cooled to room temperature, deionized water, which is added, makes the solid content 32~36% of reaction solution, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
The coalescing agent is the composition of triethylene glycol monomethyl ether and propylene glycol methyl ether acetate, or is Triethylene glycol ethyl ether
With the composition of propylene glycol methyl ether acetate；
The alcohols chain extender is 1,4- butanediol or 1,3- propylene glycol；The additional amount of the alcohols chain extender is 3.2~3.8 weights
Measure part.
2. quick-drying water-resistant type aqueous polyurethane woodenware lacquer as described in claim 1, which is characterized in that the levelling agent is poly-
At least one of ether modified silicon oil, Siloxane-Oxyalkylene Copolymers and dimethyl silicone polymer.
3. quick-drying water-resistant type aqueous polyurethane woodenware lacquer as described in claim 1, which is characterized in that the wetting agent is second
At least one of oxygroup alkylsurfuric acid ammonium, laureth sodium sulfovinate and octyl phenol polyoxyethylene ether.
4. quick-drying water-resistant type aqueous polyurethane woodenware lacquer as described in claim 1, which is characterized in that the organic tin catalysis
Agent is dibutyl tin dilaurate.
5. a kind of method for preparing quick-drying water-resistant type aqueous polyurethane woodenware lacquer as described in claim 1, which is characterized in that packet
Include following steps:
S1,11~13 parts by weight of isophorone diisocyanate and 10.5~12.5 parts by weight of polybutadiene diol investment are reacted
In kettle, temperature is maintained at 60~75 DEG C, instills 0.001~0.003 parts by weight of organic tin catalyst, is warming up to 80~100 DEG C,
Insulation reaction 2~3 hours；
S2,40~60 DEG C are cooled to, alcohols chain extender and 6~9 parts by weight of acetone is added, be warming up to 70~80 DEG C, reflux heat preservation
Reaction 1~1.5 hour, continuously adds 1.5~2.0 parts by weight of dihydroxy half ester, and insulation reaction 1 hour；
S3,40 DEG C are cooled to, 1.0~1.5 parts by weight of triethylamine is added, stirred 20~30 minutes, reaction solution is made；
S4, it is cooled to room temperature, deionized water, which is added, makes the solid content 32~36% of reaction solution, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
6~9 parts by weight of coalescing agent and 3- methyl-1-butanol 3~6 is added in S5,100 parts by weight of aqueous dispersions of polyurethanes
Parts by weight, stirring 5~after ten minutes, 0.1~1 parts by weight of levelling agent and 0.1~1 parts by weight of wetting agent are added, stir 5~10 points
Clock is 8.0~9.0 using ammonia water conditioning system pH value, quick-drying water-resistant type aqueous polyurethane woodenware lacquer is made；
The alcohols chain extender is 1,4- butanediol or 1,3- propylene glycol；The additional amount of the alcohols chain extender is 3.2~3.8 weights
Measure part.
6. the preparation method of quick-drying water-resistant type aqueous polyurethane woodenware lacquer as claimed in claim 5, which is characterized in that described to have
Machine tin catalyst is dibutyl tin dilaurate.
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| CN101331196A (en) * | 2005-12-16 | 2008-12-24 | 巴斯福涂料股份公司 | Aqueous coating material, method for the production thereof, and use thereof |
| CN102070768A (en) * | 2010-12-06 | 2011-05-25 | 安徽好思家涂料有限公司 | Water-soluble polyurethane for wood lacquer and preparation method thereof |
| CN104650651A (en) * | 2013-11-25 | 2015-05-27 | 东芝泰格有限公司 | Ink composition for inkjet recording |
| CN105176364A (en) * | 2015-09-17 | 2015-12-23 | 合肥思敬齐化工材料有限责任公司 | Cationic polyurethane resin for waterborne wood primers and preparation method thereof |
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| CN101331196A (en) * | 2005-12-16 | 2008-12-24 | 巴斯福涂料股份公司 | Aqueous coating material, method for the production thereof, and use thereof |
| CN102070768A (en) * | 2010-12-06 | 2011-05-25 | 安徽好思家涂料有限公司 | Water-soluble polyurethane for wood lacquer and preparation method thereof |
| CN104650651A (en) * | 2013-11-25 | 2015-05-27 | 东芝泰格有限公司 | Ink composition for inkjet recording |
| CN105176364A (en) * | 2015-09-17 | 2015-12-23 | 合肥思敬齐化工材料有限责任公司 | Cationic polyurethane resin for waterborne wood primers and preparation method thereof |
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