CN108047927A - 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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- CN108047927A CN108047927A CN201711478902.6A CN201711478902A CN108047927A CN 108047927 A CN108047927 A CN 108047927A CN 201711478902 A CN201711478902 A CN 201711478902A CN 108047927 A CN108047927 A CN 108047927A
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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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- 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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- 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
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- 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
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- 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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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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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：3~6 parts of 100 parts of aqueous polyurethane dispersion, 0.1~1 part of levelling agent, 0.1~1 part of wetting agent, 6~9 parts of coalescents and 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, available for woodwork coatings such as furniture, floors.
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 technology
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, do not contain a large amount of volatile organic matters, have in terms of economizing on resources with environmental protection incomparable
Superiority.At present, although domestic woodwork coating is still based on solvent-borne type, as domestic air quality deteriorates, haze is increasingly
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.
At present, 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.
Unique physicochemical properties that aqueous polyurethane possesses 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 bases, 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 breast
Liquid particles agglomerate, and the counterdiffusion of polymer chain phase and crosslink reaction, and paint film property is good, with preferable water resistance, solvent resistant
Performance etc..The major defect of waterborne two-component polyurethane coating generates various by-products for curing agent and water reaction, causes paint film
The forfeiture of crosslinking ability, the shortening of pot-life and the formation of bubble cause paint film unglazed and reduce the physical and chemical performance of paint film,
So it stills need to improve in wet adhesion property, solvent resistance, scratch resistance, transparency etc..And aqueous polyurethane dispersion
Coating is one-component coating, and Water-borne modification mainly introduces by emulsifier or on the main chain of polymer hydrophilic radical, belongs to heat
Plastic resin, Polymer Molecular Weight is larger, and simply moisture evaporation into environment, meets environmental requirement in film forming procedure,
There is to facilitate construction, but the water resistance of monocomponent waterborne polyurethane coating, wearability, to the wettability of ground, into
This etc. limits its development.And pass through the cross-linking modified mechanical performance and chemically-resistant that can improve water-borne PU dispersion coatings
Moral character energy, but the modification of aqueous polyurethane can cause the rise of production cost.
At present, on how to optimize the experimental study of water-borne PU dispersion coatings performance, it is mostly focused on main body tree
The modification of fat aqueous polyurethane, and often ignore influence of the coating additive for aqueous polyurethane.It is applied with common solvent-borne 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 causes aqueous painting
Material except rate of drying, to adhesive force of timber etc. with solvent based coating difference in addition to, in coating and reality
Be easier to occur in coating process moistening is bad, levelling is bad, shrinkage cavity, depression and the problems such as cissing.So it is applied in aqueous wooden ware
In the formula system of material, the use of surfactant is essential.At present, it is normal mostly in water-borne wood coating sector application
Advise surfactant, such as polyether modified siloxane etc..The surface-active of siloxane type surfactants is strong, can effectively reduce
The surface tension of aqueous coating system stays equality purpose so as to reach base material moistening and flowing.But this kind of surfactant tool
There is very strong foam stabilizing tendency, 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 is would have to using the strong antifoaming agent of defoaming, such as polyethers
Type antifoaming agent, but strength antifoaming agent can then be brought the problem of new again, such as poor compatibility of the antifoaming agent in system can influence
Glossiness, the transparency and performance of paint film etc..Further, since water paint is using water as decentralized medium, if temperature is less than -5 DEG C
When, water paint will freeze or even scrap, and cause damages, so the transport and storage of water paint are required for carrying out heat preservation
Measure, which also limits the popularizations of water paint.
The content 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
Bin 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 bin stability of varnish, and improves the rate of drying and water resistance of paint film, solves simultaneously
It has determined because the use of the surfactants such as wetting agent, levelling agent causes paint film to have the problem of bubble, shrinkage cavity etc..
A kind of quick-drying water-resistant type aqueous polyurethane woodenware lacquer provided by the invention 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 coalescents and 3- methyl-1s-
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, when insulation reaction 2~3 is small；
A2,40~60 DEG C are cooled to, adds in 6~9 parts by weight of alcohols chain extender and acetone, be warming up to 70~80 DEG C, reflux
When insulation reaction 1~1.5 is small, 1.5~2.0 parts by weight of dihydroxy half ester are continuously added, when insulation reaction 1 is small；
A3,40 DEG C are cooled to, adds in 1.0~1.5 parts by weight of triethylamine, stirred 20~30 minutes, reaction solution is made；
A4, room temperature is cooled to, adding in deionized water makes the solid content of reaction solution be 32~36%, is dispersed with stirring, 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 coalescents are the composition of triethylene glycol monomethyl ether and propylene glycol methyl ether acetate or are 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 for (2~
3):1。
Preferably, the alcohols chain extender is 1,4-butanediol or 1,3-PD；The addition of the alcohols chain extender
For 3.2~3.8 parts by weight.
Preferably, the organic tin catalyst is dibutyl tin laurate.
Correspondingly, the present invention also provides the preparation method of the quick-drying water-resistant type aqueous polyurethane woodenware lacquer, specifically
Comprise the following steps：
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, when insulation reaction 2~3 is small；
S2,40~60 DEG C are cooled to, adds in 6~9 parts by weight of alcohols chain extender and acetone, be warming up to 70~80 DEG C, reflux
When insulation reaction 1~1.5 is small, 1.5~2.0 parts by weight of dihydroxy half ester are continuously added, when insulation reaction 1 is small；
S3,40 DEG C are cooled to, adds in 1.0~1.5 parts by weight of triethylamine, stirred 20~30 minutes, reaction solution is made；
S4, room temperature is cooled to, adding in deionized water makes the solid content of reaction solution be 32~36%, is dispersed with stirring, decompression is steamed
Except acetone, aqueous polyurethane dispersion is made；
S5,100 parts by weight of aqueous dispersions of polyurethanes add in 6~9 parts by weight of coalescents and 3- methyl-1-butanols 3
~6 parts by weight, stirring 5~after ten minutes, addition 0.1~1 parts by weight of 0.1~1 parts by weight of levelling agent and wetting agent, stirring 5~
10 minutes, the use of ammonium hydroxide regulation 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
It measures as 3.2~3.8 parts by weight.
Further, the organic tin catalyst is dibutyl tin laurate.
After the present invention synthesizes performed polymer using isophorone diisocyanate and polybutadiene diol under catalysis, alcohol is added in
Class chain extender and anionic hydrophilic chain extender dihydroxy half ester carry out chain extension, and salt is neutralized into after chain extension, finally add 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 play an important role 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, when dosage is low defoaming act on and not showing
It writes, dosage height can then reduce paint film property, and the present invention uses excessive alcohols chain extender, tool in aqueous polyurethane dispersion
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-butanols coordinate, play significant defoaming, foam-inhibiting effect.Meanwhile after paint film drying, 3- first
Base-n-butyl alcohol is combined with the aqueous polyurethane dispersion, is formed fine and close and hydrophobic membrane structure, is effectively prevented hydrone from entering
It invades, substantially increases the water resistance of paint film.Also, based on the molecular structure and property of 3- methyl-1-butanols, in drying process
In combined with the aqueous polyurethane dispersion, improve paint film drying when squeeze hydrone speed, effectively shorten drying time.
Coalescents are 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 coalescents, on the one hand which can optimize paint film film forming
On the other hand temperature, rate of drying and water resistance are coordinated so that varnish body with dihydric alcohol, 3- methyl-1-butanols equal solvent
Be that the balance of hydrophilic and oleophilic reaches preferable level, improve the cold and hot bin 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, advantage of the invention is 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 bin 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 decoratings
Use water-borne wood coating》Requirement, available for woodwork coatings such as furniture, floors.
(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 scope or present disclosure is not being departed from, in spirit and scope, the change that is carried 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,
Coalescents 6kg and 3- methyl-1-butanol 3kg；
The coalescents are by triethylene glycol monomethyl ether and propylene glycol methyl ether acetate by weight 2:1 is composed.
Preparation method：S1, isophorone diisocyanate 11kg and polybutadiene diol 10.5kg is put into reaction kettle,
Temperature is maintained at 60 DEG C, instills dibutyl tin laurate 0.001kg, is warming up to 80 DEG C, when insulation reaction 2 is small；
S2,40 DEG C are cooled to, adds in 1,4-butanediol 3.2kg and acetone 6kg, be warming up to 70 DEG C, reflux insulation reaction 1 is small
When, dihydroxy half ester 1.5kg is continuously added, when insulation reaction 1 is small；
S3,40 DEG C are cooled to, adds in triethylamine 1.0kg, stirred 20 minutes, reaction solution is made；
S4, room temperature is cooled to, adding in deionized water makes the solid content of reaction solution be 32%, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
S5, aqueous dispersions of polyurethanes 100kg add in coalescents 6kg and 3- methyl-1-butanol 3kg, stir 5 points
Zhong Hou adds in polyether modified silicon oil 0.1kg and laureth sodium sulfovinate 0.1kg, stirs 5 minutes, uses ammonium hydroxide regulation 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, into
Film auxiliary agent 9kg and 3- methyl-1-butanol 6kg；
The coalescents are by triethylene glycol monomethyl ether and propylene glycol methyl ether acetate by weight 3:1 is composed.
Preparation method：S1, isophorone diisocyanate 13kg and polybutadiene diol 12.5kg is put into reaction kettle,
Temperature is maintained at 75 DEG C, instills dibutyl tin laurate 0.003kg, is warming up to 100 DEG C, when insulation reaction 3 is small；
S2,60 DEG C are cooled to, adds in 1,3-PD 3.8kg and acetone 9kg, be warming up to 80 DEG C, flow back insulation reaction 1.5
Hour, dihydroxy half ester 2.0kg is continuously added, when insulation reaction 1 is small；
S3,40 DEG C are cooled to, adds in triethylamine 1.5kg, stirred 30 minutes, reaction solution is made；
S4, room temperature is cooled to, adding in deionized water makes the solid content of reaction solution be 36%, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
S5, aqueous dispersions of polyurethanes 100kg add in coalescents 9kg and 3- methyl-1-butanol 5kg, stir 10 points
Zhong Hou adds in dimethyl silicone polymer 1kg and ethoxylated alkyl ammonium sulfate 1kg, stirs 10 minutes, uses ammonium hydroxide regulation 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, coalescents 8kg and 3- methyl-1-butanol 5kg；
The coalescents are by Triethylene glycol ethyl ether and propylene glycol methyl ether acetate by weight 2:1 is composed.
Preparation method：S1, isophorone diisocyanate 12kg and polybutadiene diol 11.5kg is put into reaction kettle,
Temperature is maintained at 70 DEG C, instills dibutyl tin laurate 0.002kg, is warming up to 90 DEG C, when insulation reaction 2 is small；
S2,50 DEG C are cooled to, adds in 1,4-butanediol 3.5kg and acetone 8kg, be warming up to 75 DEG C, reflux insulation reaction 1 is small
When, dihydroxy half ester 1.8kg is continuously added, when insulation reaction 1 is small；
S3,40 DEG C are cooled to, adds in triethylamine 1.2kg, stirred 25 minutes, reaction solution is made；
S4, room temperature is cooled to, adding in deionized water makes the solid content of reaction solution be 34%, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
S5, aqueous dispersions of polyurethanes 100kg add in coalescents 8kg and 3- methyl-1-butanol 5kg, stir 10 points
Zhong Hou adds in Siloxane-Oxyalkylene Copolymers 0.6kg and octyl phenol polyoxyethylene ether 0.4kg, 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, coalescents 7kg and 3- methyl-1-butanol 4kg；
The coalescents are by Triethylene glycol ethyl ether and propylene glycol methyl ether acetate by weight 3:1 is composed.
Preparation method：S1, isophorone diisocyanate 12kg and polybutadiene diol 11.5kg is put into reaction kettle,
Temperature is maintained at 65 DEG C, instills dibutyl tin laurate 0.003kg, is warming up to 100 DEG C, when insulation reaction 2 is small；
S2,60 DEG C are cooled to, adds in 1,4-butanediol 3.6kg and acetone 7kg, be warming up to 80 DEG C, reflux insulation reaction 1 is small
When, dihydroxy half ester 2.0kg is continuously added, when insulation reaction 1 is small；
S3,40 DEG C are cooled to, adds in triethylamine 1.3kg, stirred 20 minutes, reaction solution is made；
S4, room temperature is cooled to, adding in deionized water makes the solid content of reaction solution be 35%, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
S5,100 parts by weight of aqueous dispersions of polyurethanes add in coalescents 7kg and 3- methyl-1-butanol 4kg, stirring
After five minutes, Siloxane-Oxyalkylene Copolymers 0.3kg and laureth sodium sulfovinate 0.7kg is added in, 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 bin stability, is stored 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
Standard《GB/T 23999-2009 indoor decorating water-borne wood coatings》Requirement, available for applications such as furniture, floors.
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, this comparative example differs only in：The dosage of 1,4- butanediols is changed by 3.5kg
For 2.5kg.
Comparative example 2：Compared with Example 3, this comparative example differs only in：The dosage of 1,4- butanediols is changed by 3.5kg
For 4.4kg.
Comparative example 3：Compared with Example 3, this comparative example differs only in：Using only Triethylene glycol ethyl ether as into
Film auxiliary agent, dosage are constant.
Comparative example 4：Compared with Example 3, this comparative example differs only in：Using only propylene glycol methyl ether acetate as
Coalescents, dosage are constant.
Comparative example 5：Compared with Example 3, this comparative example differs only in：The dosage of coalescents 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, this comparative example differs only in：The use of ammonium hydroxide regulation system pH value is 9.5.
Comparative example 7：Compared with Example 3, this comparative example differs only in：It is 7.2 to measure system pH, without using ammonia
Water adjusts pH value.
As seen from the above table：Change certain parameter in the species of raw material of the present invention or dosage or change 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, each comparative example differs only in：Respectively using isobutanol, neopentane,
Tert-pentyl alcohol, 2-methyl-1-butene alcohol, 5- methyl-1s-hexanol replace 3- methyl-1-butanols.
As seen from the above table：
1) after the 3- methyl-1-butanols 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 bin stability without significant change, but its coating system show it is very strong
Foam stability brings a large amount of shrinkage cavities, bubble to coating surface, 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, so fine and close structure makes again
Bubble in the system of obtaining can not discharge, and cause coating system with having a large amount of bubbles in paint film.
2) the 3- methyl-1-butanols in the present invention are 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 bin stability are bright
It is aobvious to be deteriorated；And the 3- methyl-1-butanols in the present invention are replaced with into the then drying time increasing of 5- methyl-1s-hexanol (comparative example 12)
Adding, adhesive force, water resistance and bin stability are substantially deteriorated, and prompt the molecular structure and property based on 3- methyl-1-butanols,
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
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (9)
1. a kind of quick-drying water-resistant type aqueous polyurethane woodenware lacquer, which is characterized in that include the raw material of following parts by weight meter：It is 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 coalescents and 3- methyl-1-butanols
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 input 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,
When insulation reaction 2~3 is small；
A2,40~60 DEG C are cooled to, adds in 6~9 parts by weight of alcohols chain extender and acetone, be warming up to 70~80 DEG C, reflux heat preservation
When reaction 1~1.5 is small, 1.5~2.0 parts by weight of dihydroxy half ester are continuously added, when insulation reaction 1 is small；
A3,40 DEG C are cooled to, adds in 1.0~1.5 parts by weight of triethylamine, stirred 20~30 minutes, reaction solution is made；
A4, room temperature is cooled to, adding in deionized water makes the solid content of reaction solution be 32~36%, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone.
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 coalescents are three
The composition of glycol monoethyl ether and propylene glycol methyl ether acetate is Triethylene glycol ethyl ether and propylene glycol methyl ether acetate
Composition.
5. quick-drying water-resistant type aqueous polyurethane woodenware lacquer as described in claim 1, which is characterized in that the alcohols chain extender is
1,4- butanediols or 1,3- propylene glycol；The addition of the alcohols chain extender is 3.2~3.8 parts by weight.
6. 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 laurate.
A kind of 7. method for preparing quick-drying water-resistant type aqueous polyurethane woodenware lacquer as described in claim 1, which is characterized in that bag
Include following steps：
S1,11~13 parts by weight of isophorone diisocyanate and 10.5~12.5 parts by weight of polybutadiene diol input 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,
When insulation reaction 2~3 is small；
S2,40~60 DEG C are cooled to, adds in 6~9 parts by weight of alcohols chain extender and acetone, be warming up to 70~80 DEG C, reflux heat preservation
When reaction 1~1.5 is small, 1.5~2.0 parts by weight of dihydroxy half ester are continuously added, when insulation reaction 1 is small；
S3,40 DEG C are cooled to, adds in 1.0~1.5 parts by weight of triethylamine, stirred 20~30 minutes, reaction solution is made；
S4, room temperature is cooled to, adding in deionized water makes the solid content of reaction solution be 32~36%, is dispersed with stirring, removes third under reduced pressure
Aqueous polyurethane dispersion is made in ketone；
S5,100 parts by weight of aqueous dispersions of polyurethanes add in 6~9 parts by weight of coalescents and 3- methyl-1-butanols 3~6
Parts by weight, stirring 5~after ten minutes, 0.1~1 parts by weight of 0.1~1 parts by weight of levelling agent and wetting agent are added in, stir 5~10 points
Clock is 8.0~9.0 using ammonium hydroxide regulation system pH value, quick-drying water-resistant type aqueous polyurethane woodenware lacquer is made.
8. the preparation method of quick-drying water-resistant type aqueous polyurethane woodenware lacquer as claimed in claim 7, which is characterized in that the alcohol
Class chain extender is 1,4- butanediols or 1,3- propylene glycol；The addition of the alcohols chain extender is 3.2~3.8 parts by weight.
9. the preparation method of quick-drying water-resistant type aqueous polyurethane woodenware lacquer as claimed in claim 7, which is characterized in that described to have
Machine tin catalyst is dibutyl tin laurate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113737531A (en) * | 2021-09-26 | 2021-12-03 | 深圳市联星服装辅料有限公司 | Impregnation liquid, waterborne polyurethane impregnation polyester cord and preparation method thereof |
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| CN113737531B (en) * | 2021-09-26 | 2023-10-20 | 深圳市联星服装辅料有限公司 | Dipping liquid, aqueous polyurethane dipping polyester rope and preparation method thereof |
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