CN108976399A - A kind of aqueous alkide resin and preparation method thereof - Google Patents
A kind of aqueous alkide resin and preparation method thereof Download PDFInfo
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- CN108976399A CN108976399A CN201810943348.2A CN201810943348A CN108976399A CN 108976399 A CN108976399 A CN 108976399A CN 201810943348 A CN201810943348 A CN 201810943348A CN 108976399 A CN108976399 A CN 108976399A
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- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
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- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
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Abstract
The present invention relates to aqueous functional resin technology fields, more particularly, to a kind of aqueous alkide resin and preparation method thereof.The aqueous alkide resin is mainly made of following component according to parts by weight: 15-25 parts of linseed oil, 0.1-2 parts of maleic anhydride, 5-20 parts of M-phthalic acid, 10-20 parts of polyalcohol, 1-10 parts of trimellitic anhydride, 4-16 parts of acrylic monomer, 0.1-0.5 parts of initiator, 10-20 parts of cosolvent, 3-9 parts of neutralizer and 10-30 parts of water.What is be prepared is aqueous dispersion, and hydrophilic radical is low relative to the content of water soluble alkyd resin, and it is not necessary that aqueous dispersion is added, to improve the initial stage water resistance of paint film when coating.Acrylic monomer is added, improves the glass transition temperature of system, makes it have initial hardness, there is good water release property in drying process, in the case where engineering coating, eliminate the risk that rainwater and dew destroy paint film.
Description
Technical field
The present invention relates to aqueous functional resin technology fields, more particularly, to a kind of aqueous alkide resin and its preparation side
Method.
Background technique
As national economy improves, country is increasingly stringenter environmental requirement, and people are also more next to the consciousness of environmental protection
Stronger, water paint is inevitable development trend.
Solvent-borne alkyd paint is because of its construction is simple, and one-component is from doing, and high comprehensive performance, sexual valence is relatively high and is made extensively
With.Because environmental protection pressure and resource it is in short supply, people have been devoted to solvent-borne alkyd paint being converted into Water-borne alkyd coating.With
Coating additive is widely used, and defoaming that Water-borne alkyd coating faces, levelability and has obtained certain journey from problems such as stemness
The solution of degree.
The aqueous alkide resin of conventional Water-borne alkyd coating usually has water-soluble alkyd resin and water emulsification type alkyd resin,
Water-soluble alkyd resin typically contains a large amount of hydrophilic radical, such as hydroxyl, carboxyl, sulfonic group etc., and neutralizer is added and is formed
Water-soluble salting liquid, fully transparent, less than 0.01 micron, manufactured Water-borne alkyd coating has resin partial size before complete film forming
There is extremely strong hydrophily, initial stage water resistance is very poor.Suitable emulsifier is added in water emulsification alkyd resin during the preparation process, right
Alkyd resin carries out the latex particle that emulsification forms oil-in-water type, and general partial size is greater than 0.1 micron, and be creamy white opaque shape.
During preparing alkyd paint using such water and milk flower alkyd resin, the decentralized medium of pigments and fillers dispersion cannot be made with it, otherwise can
Make emulsion breaking because of high shear force during the grinding process, aqueous dispersion must be additionally incorporated, pigments and fillers are dispersed.And it paints
There are emulsifier and water dispersant in film, the two is extremely hydrophilic substance, and the paint film water resistance of coating is bad.
For the alkyd paint of initial stage poor water resistance, in actual engineering coating, especially in open field coating, apply
Rainy or night dew is encountered after dress a few houres, paint film may be because that no full cross-linked solidification or volatile materials are not filled
Divide release and destroyed or dissolved by rainwater or dew easily, causes to do over again, form the waste or economic loss of resource.
In view of this, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of aqueous alkide resin, to solve aqueous alcoholic existing in the prior art
The technical problem of acid resin initial stage poor water resistance, coating adaptive difference.
The second object of the present invention is to provide a kind of preparation method of aqueous alkide resin, the preparation method technique letter
Single, mild condition is suitble to industrialized production.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
A kind of aqueous alkide resin is mainly made of following component according to parts by weight: 15-25 parts of linseed oil, suitable fourth
0.1-2 parts of enedioic acid acid anhydride, 5-20 parts of M-phthalic acid, 10-20 parts of polyalcohol, 1-10 parts of trimellitic anhydride, acrylic monomer
4-16 parts, 0.1-0.5 parts of initiator, 10-20 parts of cosolvent, 3-9 parts of neutralizer and 10-30 parts of water.
By the selection of each raw material, the partial size for the aqueous alkide resin being prepared is between 0.01-0.1 μm the present invention,
It is the aqueous dispersion between water-soluble and aqueous emulsion, be translucent shape；Also, its hydrophilic radical is relative to water-soluble alcohol acid
The content of resin is low, and the resin hydrophily for neutralizing formation later is lower, and the carrier that can disperse as pigments and fillers, without another
Outer addition aqueous dispersion, to improve the initial stage water resistance of paint film when coating.Meanwhile acrylic monomer being added wherein,
The glass transition temperature for improving system, makes it have initial hardness, there is good water release property in the drying process, what paint film was done
Fastly, water-fast initial stage water resistance can be improved for 24 hours afterwards from dry 1h (25 DEG C), in the case wheres engineering coating such as field construction etc.,
Eliminate the risk that rainwater and dew destroy paint film.It is that pale yellow transparent is sticky by the aqueous alkide resin that this is prepared
Liquid, viscosity are 180-220s (applying -4 glasss).
Preferably, the aqueous alkide resin is mainly made of following component according to parts by weight: linseed oil 18-22
Part, 0.1-1 parts of maleic anhydride, 8-15 parts of M-phthalic acid, 12-18 parts of polyalcohol, 2-8 parts of trimellitic anhydride, acrylic acid
6-15 parts of class monomer, 0.2-0.3 parts of initiator, 12-18 parts of cosolvent, 4-8 parts of neutralizer and 15-25 parts of water.
Preferably, the acrylic monomer includes methyl methacrylate and methacrylic acid.It is furthermore preferred that the first
The mass ratio of base methyl acrylate and methacrylic acid is (5-15) ﹕ 1, preferably (7-13) ﹕ 1.
The present invention uses above-mentioned acrylic monomer, and uses specific mass ratio, forms water compounding other components
While dispersion, the glass transition temperature for improving resin is taken into account, assigns paint film certain initial hardness, it is water-fast to improve initial stage
Property.
Preferably, the polyalcohol includes trimethylolpropane.
Preferably, the cosolvent includes propylene glycol monomethyl ether.The addition of the cosolvent improves the alkyd resin and exists
Compatibility in water.
Preferably, the neutralizer includes N-methylmorpholine and N, N- dimethylethanolamine.It is furthermore preferred that the N- methyl
Morpholine and N, the mass ratio of N- dimethylethanolamine are (1.5-2.5) ﹕ 1, preferably (1.8-2.2) ﹕ 1, more preferably 2 ﹕ 1.
The addition of the neutralizer, then adds water dispersion, and the polymer performed polymer being prepared utilizes oneself of itself
Emulsifiability disperses, and in dispersion process, neutralizer participates in the chain extension of performed polymer, polymerisation in solution is carried out, to obtain high-quality, grain
Diameter is the water-borne dispersions between 0.01-0.1 μm.During self-emulsifying, during the hydrophobic part on molecular backbone is gathered in
The heart, hydrophilic radical are distributed in surface and are directed toward peripheral water phase, the stability of the aqueous dispersion strengthened.Whole process is not necessarily to
Add emulsifier or dispersing agent etc..
Preferably, the initiator includes azo-initiator, peroxide type initiators and redox type initiators
One of or it is a variety of.It is furthermore preferred that the initiator includes peroxide type initiators, such as benzoyl peroxide.
Preferably, the aqueous alkide resin is mainly made of following component according to parts by weight: linseed oil 19-20
Part, 0.4-0.5 parts of maleic anhydride, 10-11 parts of M-phthalic acid, 13-15 parts of trimethylolpropane, trimellitic anhydride 5-6
Part, 7-10 parts of methyl methacrylate, 0.5-1.5 parts of methacrylic acid, 0.2-0.3 parts of benzoyl peroxide, propylene glycol monomethyl ether
15-17 parts, 3-5 parts of N-methylmorpholine, N, N- dimethylethanolamine 1.5-2.5 and 16-20 parts of water.
The present invention also provides a kind of preparation methods of aqueous alkide resin, include the following steps:
(a) linseed oil, maleic anhydride, M-phthalic acid and polyalcohol mixing, insulation reaction is extremely at 220-230 DEG C
Acid value is reduced to≤10mg KOH/g, is cooled to 140-150 DEG C, and trimellitic anhydride is added, drops acid value in 130-140 DEG C of heat preservation
Down to≤60mg KOH/g, material a is obtained；
(b) material a is cooled to 110-120 DEG C, and acrylic monomer is added in 120 DEG C of insulation reaction 0.5-2h and obtains object
Expect b；
(c) initiator is dissolved in the cosolvent of part, is added in material b, is kept the temperature 0.5-2h, is cooled to 95-105 DEG C, adds
Enter surplus cosolvent, be cooled to 70-85 DEG C, neutralizer is added, regulation pH value is 6-7, and water is added and stirs evenly.
Preparation method of the present invention, prepares according to above-mentioned steps, and the polymer performed polymer being prepared utilizes itself
Automatic emulsifying performance dispersion, in dispersion process, neutralizer participates in the chain extension of performed polymer, polymerisation in solution is carried out, to obtain Gao Pin
Matter, partial size are the water-borne dispersions between 0.01-0.1 μm.Hydrophobic part aggregation during self-emulsifying, on molecular backbone
At center, hydrophilic radical is distributed in surface and is directed toward peripheral water phase, the stability of the aqueous dispersion strengthened.Whole process
Without adding emulsifier or dispersing agent etc..
Preferably, in the step (c), initiator is dissolved in the cosolvent of 1/4-1/3 amount.It is furthermore preferred that initiator
It is dissolved in the cosolvent of part, in 3-4h, at the uniform velocity addition material b.
Preferably, in the step (c), neutralizer is added, controlled at 85 ± 2 DEG C, stirs 0.5-1h.
Preferably, in the step (c), after neutralizer is added, if pH value < 6, using N, N- dimethylethanolamine is adjusted
PH to 6-7.
Compared with prior art, the invention has the benefit that
(1) present invention is by the selection of each raw material, the partial size of the aqueous alkide resin being prepared for 0.01-0.1 μm it
Between, it is the aqueous dispersion between water-soluble and aqueous emulsion, be translucent shape；Also, its hydrophilic radical is relative to water solubility
The content of alkyd resin is low, and the resin hydrophily for neutralizing formation later is lower, and the carrier that can disperse as pigments and fillers, nothing
Aqueous dispersion need to be additionally incorporated, to improve the initial stage water resistance of paint film when coating；
(2) aqueous alkide resin of the present invention improves the vitrifying temperature of system wherein acrylic monomer is added
Degree, makes it have initial hardness, there is good water release property in the drying process, and paint film is done fast, does 1h (25 DEG C) certainly afterwards just
Water-fast initial stage water resistance can be improved for 24 hours, in the case wheres engineering coating such as field construction etc., eliminate rainwater and dew pair
The risk that paint film destroys；
(3) the aqueous alkide resin dispersion stabilization that preparation method of the present invention is prepared is good, and the side of preparation
Method simple process, mild condition are suitble to industrialized production.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with specific embodiment, but ability
Field technique personnel will be understood that following described embodiments are some of the embodiments of the present invention, instead of all the embodiments,
It is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.The person that is not specified actual conditions in embodiment, carries out according to conventional conditions or manufacturer's recommended conditions.Agents useful for same or instrument
Production firm person is not specified, is the conventional products that can be obtained by commercially available purchase.
The present invention provides a kind of aqueous alkide resins, are mainly made of following component according to parts by weight: linseed oil
15-25 parts, 0.1-2 parts of maleic anhydride, 5-20 parts of M-phthalic acid, 10-20 parts of polyalcohol, 1-10 parts of trimellitic anhydride,
4-16 parts of acrylic monomer, 0.1-0.5 parts of initiator, 10-20 parts of cosolvent, 3-9 parts of neutralizer and 10-30 parts of water.
In a preferred embodiment of the invention, the aqueous alkide resin is mainly by following component according to parts by weight
It is made: 18-22 parts of linseed oil, 0.1-1 parts of maleic anhydride, 8-15 parts of M-phthalic acid, 12-18 parts of polyalcohol, inclined benzene three
2-8 parts of acid anhydrides, 6-15 parts of acrylic monomer, 0.2-0.3 parts of initiator, 12-18 parts of cosolvent, 4-8 parts of neutralizer and water 15-
25 parts.
In a preferred embodiment of the invention, the acrylic monomer includes methyl methacrylate and metering system
Acid.It is furthermore preferred that the mass ratio of the methyl methacrylate and methacrylic acid is (8-12) ﹕ 1, preferably (9.5-
10.5) 1 ﹕.
In a preferred embodiment of the invention, the polyalcohol includes trimethylolpropane.
In a preferred embodiment of the invention, the cosolvent includes propylene glycol monomethyl ether.The addition of the cosolvent, mentions
The high compatibility of the alkyd resin in water.
In a preferred embodiment of the invention, the neutralizer includes N-methylmorpholine and N, N- dimethylethanolamine.
It is furthermore preferred that the N-methylmorpholine and N, the mass ratio of N- dimethylethanolamine is (1.5-2.5) ﹕ 1, preferably (1.8-
2.2) 1 ﹕, more preferably 2 ﹕ 1.
In a preferred embodiment of the invention, the initiator includes azo-initiator, peroxide type initiators
With one of redox type initiators or a variety of.It is furthermore preferred that the initiator includes peroxide type initiators, such as mistake
Benzoyl Oxide.The aqueous alkide resin is mainly made of following component according to parts by weight: 19-20 parts of linseed oil, suitable
0.4-0.5 parts of anhydride maleique, 10-11 parts of M-phthalic acid, 13-15 parts of trimethylolpropane, 5-6 parts of trimellitic anhydride, first
7-10 parts of base methyl acrylate, 0.5-1.5 parts of methacrylic acid, 0.2-0.3 parts of benzoyl peroxide, propylene glycol monomethyl ether 15-17
Part, 3-5 parts of N-methylmorpholine, N, N- dimethylethanolamine 1.5-2.5 and 16-20 parts of water.
The present invention also provides a kind of preparation methods of aqueous alkide resin, include the following steps:
(a) linseed oil, maleic anhydride, M-phthalic acid and polyalcohol mixing, insulation reaction is extremely at 220-230 DEG C
Acid value is reduced to≤10mg KOH/g, is cooled to 140-150 DEG C, and trimellitic anhydride is added, drops acid value in 130-140 DEG C of heat preservation
Down to≤60mg KOH/g, material a is obtained；
(b) material a is cooled to 110-120 DEG C, and acrylic monomer is added in 120 DEG C of insulation reaction 0.5-2h and obtains object
Expect b；
(c) initiator is dissolved in the cosolvent of part, is added in material b, is kept the temperature 0.5-2h, is cooled to 95-105 DEG C, adds
Enter surplus cosolvent, be cooled to 70-85 DEG C, neutralizer is added, regulation pH value is 6-7, and water is added and stirs evenly.
In a preferred embodiment of the invention, in the step (c), initiator is dissolved in the cosolvent of 1/4-1/3 amount
In.It is furthermore preferred that initiator is dissolved in the cosolvent of part, in 3-4h, at the uniform velocity addition material b.
In a preferred embodiment of the invention, in the step (c), neutralizer is added, controlled at 85 ± 2 DEG C,
Stir 0.5-1h.
In an of the invention preferred embodiment, in the step (c), after neutralizer is added, if pH value < 6, using N,
N- dimethylethanolamine adjusts pH to 6-7.
Embodiment 1
Aqueous alkide resin described in the present embodiment is made of following component according to parts by weight:
19.34 parts of linseed oil, 0.44 part of maleic anhydride, 10.55 parts of M-phthalic acid, trimethylolpropane 14.06
Part, 5.71 parts of trimellitic anhydride, 8.79 parts of methyl methacrylate, 0.88 part of methacrylic acid, 0.22 part of benzoyl peroxide,
16.48 parts of propylene glycol monomethyl ether, 3.96 parts of N-methylmorpholine, N, N- dimethylethanolamine 1.98 and 17.59 parts of water.
Steps are as follows for the preparation method of the aqueous alkide resin:
(1) linseed oil, maleic anhydride, M-phthalic acid and trimethylolpropane are put into reaction kettle to be switched on and is stirred
It mixes, after being slowly heated to 220-230 DEG C, insulation reaction to acid value is down to≤10mg KOH/g, opens cold oil pump, is cooled to 150
℃；When temperature is reduced to 150 DEG C, trimellitic anhydride is once added, controlled at 130-140 DEG C, and makes the acid value of system
It is reduced to≤60mg KOH/g, obtains material a；
(2) material a is cooled to 120 DEG C, when temperature is reduced to 120 DEG C, methyl methacrylate and methyl-prop is added
Olefin(e) acid obtains material b in 120 DEG C of heat preservation 1h；
(3) benzoyl peroxide is dissolved in 4 parts of propylene glycol monomethyl ether, it is at the uniform velocity added dropwise in material b in 3h,
After being added dropwise, insulation reaction 1h after being cooled to 100 DEG C, is added remaining propylene glycol monomethyl ether, after mixing evenly, is cooled to 80
DEG C, it is slowly added to N-methylmorpholine and N, N- dimethylethanolamine controls temperature in 85 ± 2 DEG C, stirs 30mi n, tests pH
Value；If pH value between 6-7, is added water and stirs evenly up to the aqueous alkide resin, filtered and packaged i.e. after inspection is qualified
It can；If pH < 6, appropriate N is added, N- dimethylethanolamine adjusts pH between 6-7, and then addition water stirs evenly up to described
Aqueous alkide resin filters and packages after inspection is qualified.
Embodiment 2
Aqueous alkide resin described in the present embodiment is made of following component according to parts by weight:
20 parts of linseed oil, 0.5 part of maleic anhydride, 10 parts of M-phthalic acid, 15 parts of trimethylolpropane, trimellitic acid
5 parts of acid anhydride, 10 parts of methyl methacrylate, 1 part of methacrylic acid, 0.3 part of benzoyl peroxide, 17 parts of propylene glycol monomethyl ether, N- first
2.6 parts of base morpholine, N, N- dimethylethanolamine 1.3 and 20 parts of water.
Preparation method described in preparation method reference implementation example 1, difference are only that: in step (3), by benzoyl peroxide first
Acyl is dissolved in 5 parts of propylene glycol monomethyl ether.
Embodiment 3
Aqueous alkide resin described in the present embodiment is made of following component according to parts by weight:
18 parts of linseed oil, 0.1 part of maleic anhydride, 8 parts of M-phthalic acid, 12 parts of trimethylolpropane, trimellitic acid
2 parts of acid anhydride, 10 parts of methyl methacrylate, 1 part of methacrylic acid, 0.2 part of benzoyl peroxide, 12 parts of propylene glycol monomethyl ether, N- first
5 parts of base morpholine, N, N- dimethylethanolamine 2.5 and 15 parts of water.
Preparation method described in preparation method reference implementation example 1.
Embodiment 4
Aqueous alkide resin described in the present embodiment is made of following component according to parts by weight:
15 parts of linseed oil, 0.1 part of maleic anhydride, 5 parts of M-phthalic acid, 10 parts of trimethylolpropane, trimellitic acid
1 part of acid anhydride, 5.4 parts of methyl methacrylate, 0.6 part of methacrylic acid, 0.1 part of benzoyl peroxide, 10 parts of propylene glycol monomethyl ether, N-
2 parts of methyl morpholine, N, N- dimethylethanolamine 1 and 10 parts of water.
Preparation method described in preparation method reference implementation example 1, difference are only that: in step (3), by benzoyl peroxide first
Acyl is dissolved in 2.5 parts of propylene glycol monomethyl ether.
Embodiment 5
Aqueous alkide resin described in the present embodiment is made of following component according to parts by weight:
25 parts of linseed oil, 2 parts of maleic anhydride, 20 parts of M-phthalic acid, 20 parts of trimethylolpropane, trimellitic anhydride
10 parts, 14.5 parts of methyl methacrylate, 1.5 parts of methacrylic acid, 0.5 part of benzoyl peroxide, 20 parts of propylene glycol monomethyl ether, N-
6 parts of methyl morpholine, N, N- dimethylethanolamine 3 and 30 parts of water.
Preparation method described in preparation method reference implementation example 1.
Embodiment 6
The present embodiment aqueous alkide resin and preparation method thereof reference implementation example 1, difference is only that, wherein methacrylic acid
The dosage of methyl esters and methacrylic acid is respectively 8.1 parts and 1.6 parts.
Embodiment 7
The present embodiment aqueous alkide resin and preparation method thereof reference implementation example 1, difference is only that, wherein methacrylic acid
The dosage of methyl esters and methacrylic acid is respectively 9.1 parts and 0.6 part.
Embodiment 8
The present embodiment aqueous alkide resin and preparation method thereof reference implementation example 1, difference is only that, the neutralizer is only adopted
Use N-methylmorpholine.
Embodiment 9
The present embodiment aqueous alkide resin and preparation method thereof reference implementation example 1, difference is only that, the neutralizer is only adopted
With N, N- dimethylethanolamine.
Embodiment 10
The present embodiment aqueous alkide resin and preparation method thereof reference implementation example 1, difference is only that, the N-methylmorpholine
And the dosage of N, N- dimethylethanolamine is respectively 3.6 parts and 2.4 parts.
Embodiment 11
The present embodiment aqueous alkide resin and preparation method thereof reference implementation example 1, difference is only that, the N-methylmorpholine
And the dosage of N, N- dimethylethanolamine is respectively 4.3 parts and 1.7 parts.
Comparative example 1
1 reference implementation example 1 of comparative example, difference are that raw material does not include methyl methacrylate and methacrylic acid.
Comparative example 2
2 reference implementation example 1 of comparative example, difference are that aqueous alkide resin is by 15 parts of linseed oil, maleic anhydride
0.5 part, 10 parts of M-phthalic acid, 15 parts of trimethylolpropane, 15 parts of trimellitic anhydride, 18 parts of methyl methacrylate, methyl
2 parts of acrylic acid, 0.2 part of benzoyl peroxide, 20 parts of propylene glycol monomethyl ether, 8 parts of N-methylmorpholine, N, 4 He of N- dimethylethanolamine
20 parts of water are made.
Experimental example 1
For the performance for the aqueous alkide resin that comparative illustration various embodiments of the present invention and comparative example are prepared, carry out with
Lower test, test result are shown in Table 1.
Test method and foundation: electron microscopy is used in partial size test；
Viscosity determining procedure refers to GB/T1723-1993；
Hardness of paint film test method refers to GB/T1730-2007B；
Surface drying time refers to GB/T1728-1989 with time test method is done solid work；
Initial stage water resistance testing method refers to GB/T1733-1993；
Adhesive force level estimate method refers to GB/T9286-1998.
The performance test results of the different alkyd resins of table 1
Note: the detection project in table 1 is that 30% distillation is added with 1% aqueous drier HLD-061 is added in the resin
The varnish of water preparation, in addition to partial size and viscosity project, hardness project is to apply to detect on a glass, and other projects are to be coated in Ma Kou
It is detected on iron.
By the selection of each raw material, the partial size for the aqueous alkide resin being prepared is between 0.01-0.1 μm the present invention,
It is the aqueous dispersion between water-soluble and aqueous emulsion, be translucent shape；Also, its hydrophilic radical is relative to water-soluble alcohol acid
The content of resin is low, and the resin hydrophily for neutralizing formation later is lower, and the carrier that can disperse as pigments and fillers, without another
Outer addition aqueous dispersion, to improve the initial stage water resistance of paint film when coating.Meanwhile acrylic monomer being added wherein,
The glass transition temperature for improving system, makes it have initial hardness, there is good water release property in the drying process, what paint film was done
Fastly, water-fast initial stage water resistance can be improved for 24 hours afterwards from dry 1h (25 DEG C), in the case wheres engineering coating such as field construction etc.,
Eliminate the risk that rainwater and dew destroy paint film.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of aqueous alkide resin, which is characterized in that be mainly made of following component according to parts by weight: linseed oil 15-
25 parts, 0.1-2 parts of maleic anhydride, 5-20 parts of M-phthalic acid, 10-20 parts of polyalcohol, 1-10 parts of trimellitic anhydride, propylene
4-16 parts of acrylic monomer, 0.1-0.5 parts of initiator, 10-20 parts of cosolvent, 3-9 parts of neutralizer and 10-30 parts of water.
2. aqueous alkide resin according to claim 1, which is characterized in that the aqueous alkide resin is mainly by by weight
The following component of number meter is made: 18-22 parts of linseed oil, 0.1-1 parts of maleic anhydride, 8-15 parts of M-phthalic acid, polynary
12-18 parts of alcohol, 2-8 parts of trimellitic anhydride, 6-15 parts of acrylic monomer, 0.2-0.3 parts of initiator, 12-18 parts of cosolvent, in
With 4-8 parts and water 15-25 parts of agent.
3. aqueous alkide resin according to claim 1, which is characterized in that the acrylic monomer includes metering system
Sour methyl esters and methacrylic acid；
Preferably, the mass ratio of the methyl methacrylate and methacrylic acid is (5-15) ﹕ 1.
4. aqueous alkide resin according to claim 1, which is characterized in that the neutralizer includes N-methylmorpholine and N,
N- dimethylethanolamine；
Preferably, the N-methylmorpholine and N, the mass ratio of N- dimethylethanolamine are (1.5-2.5) ﹕ 1.
5. aqueous alkide resin according to claim 1, which is characterized in that the polyalcohol includes trimethylolpropane；
Preferably, the cosolvent includes propylene glycol monomethyl ether；
Preferably, the initiator includes in azo-initiator, peroxide type initiators and redox type initiators
It is one or more.
6. aqueous alkide resin according to claim 1, which is characterized in that the aqueous alkide resin is mainly by by weight
The following component of number meter is made: 19-20 parts of linseed oil, 0.4-0.5 parts of maleic anhydride, 10-11 parts of M-phthalic acid, three
13-15 parts of hydroxymethyl-propane, 5-6 parts of trimellitic anhydride, 7-10 parts of methyl methacrylate, 0.5-1.5 parts of methacrylic acid, mistake
0.2-0.3 parts of Benzoyl Oxide, 15-17 parts of propylene glycol monomethyl ether, 3-5 parts of N-methylmorpholine, N, N- dimethylethanolamine 1.5-2.5
With 16-20 parts of water.
7. the preparation method of aqueous alkide resin described in any one of claims 1-6, which comprises the steps of:
(a) linseed oil, maleic anhydride, M-phthalic acid and polyalcohol mixing, insulation reaction is to acid value at 220-230 DEG C
It is reduced to≤10mg KOH/g, is cooled to 140-150 DEG C, trimellitic anhydride is added, is reduced to acid value in 130-140 DEG C of heat preservation
≤ 60mg KOH/g, obtains material a；
(b) material a is cooled to 110-120 DEG C, and acrylic monomer is added in 120 DEG C of insulation reaction 0.5-2h and obtains material b；
(c) initiator is dissolved in the cosolvent of part, is added in material b, is kept the temperature 0.5-2h, is cooled to 95-105 DEG C, more than addition
Cosolvent is measured, is cooled to 70-85 DEG C, neutralizer is added, regulation pH value is 6-7, and water is added and stirs evenly.
8. the preparation method of aqueous alkide resin according to claim 7, which is characterized in that in the step (c), cause
Agent is dissolved in the cosolvent of 1/4-1/3 amount；
Preferably, initiator is dissolved in the cosolvent of part, in 3-4h, at the uniform velocity addition material b.
9. the preparation method of aqueous alkide resin according to claim 7, which is characterized in that in the step (c), be added
Neutralizer stirs 0.5-1h controlled at 85 ± 2 DEG C.
10. the preparation method of aqueous alkide resin according to claim 7, which is characterized in that in the step (c), add
After entering neutralizer, if pH value < 6, using N, N- dimethylethanolamine adjusts pH to 6-7.
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