CN114085586B - Anti-sagging water-based alkyd resin coating with good adhesive force - Google Patents
Anti-sagging water-based alkyd resin coating with good adhesive force Download PDFInfo
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Abstract
The invention relates to an anti-sagging water-based alkyd resin coating with good adhesive force, which comprises the following components in parts by weight: 80.0-120.0 parts of SIS elastomer modified waterborne alkyd resin, 0.0-25.0 parts of waterborne nano color paste, 1.2-4.5 parts of auxiliary agent, 3.0-6.0 parts of polyvinyl alcohol, 2.0-18.0 parts of sodium sulfate type transparent powder, 4.0-10.0 parts of antifreezing agent and 10.0-25.0 parts of deionized water; wherein the SIS elastomer modified waterborne alkyd resin is prepared by the reaction of unsaturated fatty acid, SIS elastomer, 3-phenyl-2-acrylic acid-2-allyl ester, organic acid anhydride, dibasic acid, polyalcohol, styrene, benzoic acid, di-tert-butyl peroxide, dimethylolbutyric acid and a neutralizer; the anti-sagging water-based alkyd resin coating prepared by the invention takes the SIS elastomer modified water-based alkyd resin as a film forming substance, does not need to be added with a film forming auxiliary agent, an adhesion promoter and an anti-sagging auxiliary agent, and has good adhesion, fullness, flexibility, good anti-sagging property and other properties.
Description
Technical Field
The invention relates to a modified alkyd resin coating, in particular to an anti-sagging water-based alkyd resin coating with good adhesive force, and belongs to the technical field of water-based functional coatings.
Background
The alkyd resin coating has the characteristics of high gloss, fullness, low price, easily available raw materials and the like, and is convenient to construct. However, the coating film is soft, poor in water resistance and alkali resistance, poor in adhesion to some materials, insufficient in flexibility and easy to generate sagging during construction.
SIS elastomers are one type of styrenic thermoplastic elastomers, being block copolymers of styrene and isoprene. SIS is a novel thermoplastic elastomer, has the characteristics of high elasticity, easiness in processing, easiness in blending, recyclable residual materials and the like, so that the application range and the demand of the SIS are increasingly enlarged, and the SIS has larger market application potential. Therefore, the SIS elastomer is adopted to improve the performance of the water-based alkyd resin coating, and some defects of the existing water-based alkyd resin coating are effectively overcome.
Chinese patent CN110776815A discloses an anti-sagging APAO modified alkyd resin water-based functional coating, which comprises the following components in parts by weight: 50.0-70.0 parts of APAO modified water-based alkyd resin, 15.0-30.0 parts of silicon modified water-based alkyd resin, 3.0-6.0 parts of antifreezing agent, 0.3-0.8 part of thickening agent, 0.0-25.0 parts of pigment and filler, 0.0-0.8 part of dispersing agent, 3.0-8.0 parts of film-forming additive, 0.1-0.4 part of defoaming agent, 0.2-0.5 part of flatting agent, 0.1-0.5 part of wetting agent and 8.0-20.0 parts of deionized water; the polyurethane resin has the characteristics of good sagging resistance, good adhesive force, high hardness, good mechanical property, high crosslinking density, good water resistance and the like, but the adhesive force to a special base material is not ideal enough, and the flexibility is not enough.
Therefore, the development of the alkyd resin coating with good adhesion, good flexibility and sag resistance meets the requirements of social development.
Disclosure of Invention
In order to solve the technical problems existing at present, the invention aims to provide the water-based alkyd resin coating with good adhesive force, good flexibility and sagging resistance.
In order to solve the technical problems existing at present, the SIS elastomer modified waterborne alkyd resin with good adhesive force, flexibility and sag resistance is adopted as a main film forming substance, the SIS elastomer contains double bonds and can be effectively connected with a main body structure of the alkyd resin, and the SIS elastomer modified waterborne alkyd resin has the characteristics of both the SIS elastomer and the waterborne alkyd resin.
Meanwhile, in order to solve the problems of the fullness of a coating, the compatibility of a film-forming substance and water-based resin and the like after the coating is prepared, the film-forming additive is added into the film-forming substance SIS elastomer modified water-based alkyd resin during the preparation of the water-based alkyd resin, so that the viscosity of the alkyd resin in the preparation process can be effectively reduced, the dispersion of the water-based alkyd resin is facilitated, and the film-forming additive is not required to be added.
The invention does not need to add adhesion promoters and anti-sagging agents, and has good adhesion and anti-sagging performance.
The invention relates to an anti-sagging water-based alkyd resin coating with good adhesive force, which comprises the following components in parts by weight: 80.0-120.0 parts of SIS elastomer modified waterborne alkyd resin, 0.0-25.0 parts of waterborne nano color paste, 1.2-4.5 parts of auxiliary agent, 3.0-6.0 parts of polyvinyl alcohol, 2.0-18.0 parts of sodium sulfate type transparent powder, 4.0-10.0 parts of antifreezing agent and 10.0-25.0 parts of deionized water.
The SIS elastomer modified waterborne alkyd resin is prepared by reacting unsaturated fatty acid, SIS elastomer, 3-phenyl-2-acrylic acid-2-allyl ester, organic acid anhydride, dibasic acid, polyalcohol, styrene, benzoic acid, di-tert-butyl peroxide, dimethylolbutyric acid and a neutralizing agent.
The water-based nano color paste can be directly purchased in the market according to different color requirements.
The auxiliary agent is at least one of pH regulator, wetting agent, dispersant, defoaming agent, thickener and flatting agent.
The antifreezing agent is one or a combination of more of ethylene glycol, propylene glycol and glycerol.
The SIS elastomer modified waterborne alkyd resin comprises the following components in parts by weight: 15.0-25.0 parts of unsaturated fatty acid, 2.0-5.0 parts of SIS elastomer, 4.0-8.0 parts of 3-phenyl-2-acrylic acid-2-allyl ester, 8.0-15.0 parts of organic acid anhydride, 4.0-9.0 parts of dibasic acid, 10.0-24.0 parts of polyol, 3.0-5.0 parts of styrene, 2.0-3.5 parts of benzoic acid, 0.4-1.0 part of di-tert-butyl peroxide, 10.0-20.0 parts of dimethylbenzene, 3.0-6.0 parts of dimethylolbutyric acid, 0.3-0.8 part of antioxidant, 5.0-10.0 parts of film-forming assistant, 2.5-8.0 parts of neutralizer and 100.0-200.0 parts of deionized water.
Wherein, the SIS elastomer is styrene-isoprene-styrene copolymer.
The unsaturated fatty acid is one or the combination of two of refined linseed oil and refined castor oil.
The organic acid anhydride is one or a combination of more of phthalic anhydride, hexahydrophthalic anhydride, acetic anhydride, trimellitic anhydride and maleic anhydride.
The polybasic acid is one or a combination of more of cyclopentane-1, 2-dicarboxylic acid, oxalic acid, adipic acid and azelaic acid.
The film-forming additive is one or a combination of a plurality of alcohol ester dodeca, propylene glycol phenyl ether, cetyl alcohol ester, dipropylene glycol butyl ether and propylene glycol methyl ether acetate.
The polyalcohol is one or more of neopentyl glycol, 1, 4-butanediol, 1, 4-cyclohexanedimethanol, diethylene glycol, trimethylolpropane, glycerol and pentaerythritol.
The neutralizing agent is at least one of triethylamine, ammonia water and dimethylethanolamine.
The invention provides a preparation method of SIS elastomer modified waterborne alkyd resin, which comprises the following preparation steps:
a) uniformly stirring styrene, 3-phenyl-2-acrylic acid-2-allyl ester and 3/4 di-tert-butyl peroxide to obtain a mixed solution I;
b) sequentially adding unsaturated fatty acid, organic acid anhydride, dibasic acid, polyalcohol, dimethylolbutyric acid, antioxidant and dimethylbenzene according to the weight part of the formula in a reactor, and heating for dissolving;
c) heating to 160-162 ℃, keeping the temperature, stirring, reacting for 2.0h, adding benzoic acid to control the molecular weight, heating to 180 ℃, keeping the temperature, reacting for 2.0h, heating to 220-224 ℃ at the speed of 20 ℃/h, keeping the temperature, reacting for 1.0h, measuring the acid value every 15min, and when the acid value reaches the design value;
d) cooling, adding the SIS elastomer and 1/4 di-tert-butyl peroxide, stirring and reacting for 1.0 hour to obtain SIS elastomer grafted alkyd resin prepolymer; (SIS elastomer is added at this point, the SIS elastomer is a solid and is xylene soluble in this system);
e) and distilling under reduced pressure to remove xylene, adding a film-forming aid, stirring and dispersing uniformly and reducing viscosity, keeping the temperature at 120-124 ℃, dropwise adding the mixed solution I for 1.5-2.0 h, stirring and reacting for 0.5h, cooling, stirring at high speed, dispersing and adding a neutralizing agent, adding deionized water according to the formula amount, dispersing uniformly, and filtering to obtain the SIS elastomer modified waterborne alkyd resin.
The invention relates to an SIS elastomer modified waterborne alkyd resin, which is based on the applied invention patent of 'an SIS elastomer modified waterborne alkyd resin and a preparation method thereof', and is described in detail.
The invention has the following innovation points and advantages:
1) the anti-sagging water-based alkyd resin coating with good adhesion force, which is prepared by the invention, takes the SIS elastomer modified water-based alkyd resin as a main film forming substance, and does not need to be added with a film forming auxiliary agent, an adhesion force promoter and an anti-sagging auxiliary agent, so that the anti-sagging water-based alkyd resin coating with good adhesion force, good fullness, good flexibility and good anti-sagging performance are provided;
2) the anti-sagging water-based alkyd resin coating with good adhesive force prepared by the invention can effectively improve the storage performance of the coating by adding polyvinyl alcohol.
Detailed Description
The present invention is further described with reference to the following examples in which a sag resistant waterborne alkyd coating having good adhesion is provided. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention.
Example 1
An SIS elastomer modified waterborne alkyd resin A comprises the following components in parts by weight: 25.0 parts of refined linseed oil, 3.0 parts of SIS elastomer, 6.0 parts of 3-phenyl-2-acrylic acid-2-propenyl ester, 8.0 parts of phthalic anhydride, 3.0 parts of acetic anhydride, 9.0 parts of cyclopentane-1, 2-dicarboxylic acid, 15.0 parts of neopentyl glycol, 6.0 parts of trimethylolpropane, 3.0 parts of styrene, 2.5 parts of benzoic acid, 0.6 part of di-tert-butyl peroxide, 16.0 parts of xylene, 6.0 parts of dimethylolbutyric acid, 0.6 part of antioxidant, 8.0 parts of alcohol ester, 5.5 parts of ammonia water and 120.0 parts of deionized water.
The preparation method of the SIS elastomer modified waterborne alkyd resin a in the embodiment comprises the following steps:
a) uniformly stirring styrene, 3-phenyl-2-acrylic acid-2-allyl ester and 3/4 di-tert-butyl peroxide to obtain a mixed solution I;
b) sequentially adding refined linseed oil, phthalic anhydride, acetic anhydride, cyclopentane-1, 2-dicarboxylic acid, polyol, dimethylolbutyric acid, an antioxidant and xylene into a reactor according to the weight part of the formula, and heating for dissolving;
c) heating to 160-162 ℃, keeping the temperature, stirring, reacting for 2.0h, adding benzoic acid to control the molecular weight, heating to 180 ℃, keeping the temperature, reacting for 2.0h, heating to 220-224 ℃ at the speed of 20 ℃/h, keeping the temperature, reacting for 1.0h, measuring the acid value every 15min, and when the acid value reaches the design value;
d) cooling, adding the SIS elastomer and 1/4 di-tert-butyl peroxide, stirring and reacting for 1.0 hour to obtain SIS elastomer grafted alkyd resin prepolymer;
e) and distilling under reduced pressure to remove xylene, adding alcohol ester, stirring uniformly to disperse and reduce viscosity, keeping the temperature at 120-124 ℃, dropwise adding the mixed solution I for 1.5-2.0 h, stirring to react for 0.5h, cooling, stirring at high speed to disperse and add ammonia water, adding deionized water according to the formula amount, dispersing uniformly, and filtering to obtain the SIS elastomer modified waterborne alkyd resin A.
Example 2
An SIS elastomer modified waterborne alkyd resin B comprises the following components in parts by weight: 18.0 parts of refined castor oil, 5.0 parts of SIS elastomer, 6.0 parts of 3-phenyl-2-propenoic acid-2-propenyl ester, 8.0 parts of hexahydrophthalic anhydride, 5.0 parts of maleic anhydride, 5.0 parts of adipic acid, 12.0 parts of 1, 4-butanediol, 4.0 parts of pentaerythritol, 4.0 parts of styrene, 3.0 parts of benzoic acid, 0.8 part of di-tert-butyl peroxide, 17.0 parts of xylene, 6.0 parts of dimethylolbutyric acid, 0.6 part of antioxidant, 4.0 parts of dipropylene glycol butyl ether, 4.0 parts of propylene glycol methyl ether acetate, 6.0 parts of triethylamine and 140.0 parts of deionized water.
In this embodiment, a preparation method of an SIS elastomer modified waterborne alkyd resin B includes the following steps:
a) uniformly stirring styrene, 3-phenyl-2-acrylic acid-2-allyl ester and 3/4 di-tert-butyl peroxide to obtain a mixed solution I;
b) adding refined castor oil, hexahydrophthalic anhydride, maleic anhydride, adipic acid, 1, 4-butanediol, pentaerythritol, dimethylolbutyric acid, an antioxidant and xylene in a reactor according to the weight part of the formula in turn, and heating for dissolving;
c) heating to 160-162 ℃, keeping the temperature, stirring, reacting for 2.0h, adding benzoic acid to control the molecular weight, heating to 180 ℃, keeping the temperature, reacting for 2.0h, heating to 220-224 ℃ at the speed of 20 ℃/h, keeping the temperature, reacting for 1.0h, measuring the acid value every 15min, and when the acid value reaches the design value;
d) cooling, adding the SIS elastomer and 1/4 di-tert-butyl peroxide, stirring and reacting for 1.0 hour to obtain SIS elastomer grafted alkyd resin prepolymer;
e) and distilling under reduced pressure to remove xylene, adding dipropylene glycol butyl ether and propylene glycol methyl ether acetate, stirring and dispersing uniformly and reducing viscosity, keeping the temperature at 120-124 ℃, dropwise adding the mixed solution I, wherein the dropwise adding time is 1.5-2.0 h, then stirring and reacting for 0.5h, cooling, stirring at high speed to disperse and add triethylamine, adding deionized water with the formula amount, dispersing uniformly, and filtering to obtain the SIS elastomer modified waterborne alkyd resin B.
Example 3
An SIS elastomer modified waterborne alkyd resin C comprises the following components in parts by weight: 15.0 parts of refined linseed oil, 3.5 parts of SIS elastomer, 7.0 parts of 3-phenyl-2-acrylic acid-2-propenyl ester, 15.0 parts of trimellitic anhydride, 6.0 parts of azelaic acid, 13.0 parts of 1, 4-cyclohexanedimethanol, 4.0 parts of glycerol, 3.0 parts of styrene, 3.0 parts of benzoic acid, 0.6 part of di-tert-butyl peroxide, 15.0 parts of xylene, 5.0 parts of dimethylolbutyric acid, 0.5 part of antioxidant, 7.0 parts of propylene glycol phenyl ether, 6.5 parts of dimethylethanolamine and 125.0 parts of deionized water.
The preparation method of the SIS elastomer modified waterborne alkyd resin C in the embodiment comprises the following steps:
a) uniformly stirring styrene, 3-phenyl-2-acrylic acid-2-allyl ester and 3/4 di-tert-butyl peroxide to obtain a mixed solution I;
b) sequentially adding refined linseed oil, trimellitic anhydride, azelaic acid, 1, 4-cyclohexanedimethanol, glycerol, dimethylolbutyric acid, an antioxidant and xylene into a reactor according to the weight part of the formula, and heating for dissolving;
c) heating to 160-162 ℃, keeping the temperature, stirring, reacting for 2.0h, adding benzoic acid to control the molecular weight, heating to 180 ℃, keeping the temperature, reacting for 2.0h, heating to 220-224 ℃ at the speed of 20 ℃/h, keeping the temperature, reacting for 1.0h, measuring the acid value every 15min, and when the acid value reaches the design value;
d) cooling, adding the SIS elastomer and 1/4 di-tert-butyl peroxide, stirring and reacting for 1.0 hour to obtain SIS elastomer grafted alkyd resin prepolymer;
e) and distilling under reduced pressure to remove xylene, adding propylene glycol phenyl ether, stirring and dispersing uniformly and reducing viscosity, keeping the temperature at 120-124 ℃, dropwise adding the mixed solution I for 1.5-2.0 h, stirring and reacting for 0.5h, cooling, stirring at high speed, dispersing and adding dimethylethanolamine, adding deionized water according to the formula amount, dispersing uniformly, and filtering to obtain the SIS elastomer modified waterborne alkyd resin C.
Comparative example 1
A conventional modified waterborne alkyd resin D comprises the following components in parts by weight: 20.0 parts of refined linseed oil, 6.0 parts of 3-phenyl-2-acrylic acid-2-propenyl ester, 8.0 parts of hexahydrophthalic anhydride, 4.0 parts of acetic anhydride, 7.0 parts of azelaic acid, 14.0 parts of diethylene glycol, 5.0 parts of trimethylolpropane, 5.0 parts of styrene, 3.0 parts of benzoic acid, 0.9 part of di-tert-butyl peroxide, 18.0 parts of dimethylbenzene, 5.5 parts of dimethylolbutyric acid, 0.7 part of antioxidant, 8.5 parts of hexadecanol ester, 6.0 parts of triethylamine and 130.0 parts of deionized water.
In this embodiment, a preparation method of a conventional modified waterborne alkyd resin D includes the following steps:
a) uniformly stirring styrene, 3-phenyl-2-acrylic acid-2-allyl ester and di-tert-butyl peroxide to obtain a mixed solution I;
b) sequentially adding refined linseed oil, hexahydrophthalic anhydride, acetic anhydride, azelaic acid, diethylene glycol, trimethylolpropane, dimethylolbutyric acid, an antioxidant and dimethylbenzene according to the weight part of the formula in a reactor, and heating for dissolving;
c) heating to 160-162 ℃, keeping the temperature, stirring, reacting for 2.0h, adding benzoic acid to control the molecular weight, heating to 180 ℃, keeping the temperature, reacting for 2.0h, heating to 220-224 ℃ at the speed of 20 ℃/h, keeping the temperature, reacting for 1.0h, measuring the acid value every 15min, and when the acid value reaches the design value;
d) and distilling under reduced pressure to remove xylene, adding hexadecanol ester, stirring and dispersing uniformly and reducing viscosity, keeping the temperature at 120-124 ℃, dropwise adding the mixed solution I for 1.5-2.0 h, stirring and reacting for 0.5h, cooling, stirring at high speed and dispersing, adding triethylamine, adding deionized water according to the formula amount, dispersing uniformly, and filtering to obtain the conventional modified waterborne alkyd resin D.
Comparative example 2
An SIS elastomer modified waterborne alkyd resin E comprises the following components in parts by weight: 15.0 parts of refined linseed oil, 3.5 parts of SIS elastomer, 7.0 parts of 3-phenyl-2-acrylic acid-2-propenyl ester, 15.0 parts of trimellitic anhydride, 6.0 parts of azelaic acid, 13.0 parts of 1, 4-cyclohexanedimethanol, 4.0 parts of glycerol, 3.0 parts of styrene, 3.0 parts of benzoic acid, 0.6 part of di-tert-butyl peroxide, 15.0 parts of xylene, 5.0 parts of dimethylolbutyric acid, 0.5 part of antioxidant, 6.5 parts of dimethylethanolamine and 125.0 parts of deionized water.
The preparation method of the SIS elastomer modified waterborne alkyd resin E in the embodiment comprises the following steps:
a) uniformly stirring styrene, 3-phenyl-2-acrylic acid-2-allyl ester and 3/4 di-tert-butyl peroxide to obtain a mixed solution I;
b) sequentially adding refined linseed oil, trimellitic anhydride, azelaic acid, 1, 4-cyclohexanedimethanol, glycerol, dimethylolbutyric acid, an antioxidant and xylene into a reactor according to the weight part of the formula, and heating for dissolving;
c) heating to 160-162 ℃, keeping the temperature, stirring, reacting for 2.0h, adding benzoic acid to control the molecular weight, heating to 180 ℃, keeping the temperature, reacting for 2.0h, heating to 220-224 ℃ at the speed of 20 ℃/h, keeping the temperature, reacting for 1.0h, measuring the acid value every 15min, and when the acid value reaches the design value;
d) cooling, then adding the SIS elastomer and 1/4 di-tert-butyl peroxide, stirring and reacting for 1.0 hour to obtain SIS elastomer grafted alkyd resin prepolymer;
e) and distilling under reduced pressure to remove xylene, cooling, dropwise adding the mixed solution I for 1.5-2.0 hours, then stirring and reacting for 0.5 hour, cooling, stirring at a high speed to disperse and add dimethylethanolamine, adding deionized water according to the formula amount, dispersing uniformly, and filtering to obtain the SIS elastomer modified waterborne alkyd resin E.
Example 4
An anti-sagging water-based alkyd resin coating with good adhesion comprises the following components in parts by weight: 100.0 parts of SIS elastomer modified waterborne alkyd resin A, 0.5 part of pH regulator, 0.4 part of wetting agent, 0.4 part of dispersant, 0.3 part of defoamer, 0.3 part of flatting agent, 5.0 parts of polyvinyl alcohol, 2.0 parts of sodium sulfate type transparent powder, 6.0 parts of ethylene glycol and 15.0 parts of deionized water.
Example 5
An anti-sagging water-based alkyd resin coating with good adhesion comprises the following components in parts by weight: 80.0 parts of SIS elastomer modified water-based alkyd resin B, 15.0 parts of water-based nano color paste, 0.4 part of wetting agent, 0.4 part of thickening agent, 0.9 part of dispersing agent, 0.5 part of flatting agent, 0.4 part of defoaming agent, 4.5 parts of polyvinyl alcohol, 18.0 parts of sodium sulfate type transparent powder, 5.0 parts of propylene glycol and 25.0 parts of deionized water.
Example 6
An anti-sagging water-based alkyd resin coating with good adhesion comprises the following components in parts by weight: 110.0 parts of SIS elastomer modified waterborne alkyd resin C, 10.0 parts of waterborne nanometer color paste, 0.5 part of wetting agent, 0.4 part of thickening agent, 0.3 part of dispersing agent, 0.4 part of defoaming agent, 5.0 parts of polyvinyl alcohol, 2.0 parts of sodium sulfate type transparent powder, 7.0 parts of propylene glycol and 15.0 parts of deionized water.
Comparative example 3
A conventional modified water-based alkyd resin coating comprises the following components in parts by weight: 100.0 parts of conventional modified water-based alkyd resin D, 5.0 parts of water-based nano color paste, 0.5 part of wetting agent, 0.6 part of thickening agent, 0.5 part of dispersing agent, 0.4 part of defoaming agent, 4.5 parts of polyvinyl alcohol, 8.0 parts of sodium sulfate type transparent powder, 6.0 parts of glycerol and 20.0 parts of deionized water.
Comparative example 4
An anti-sagging water-based alkyd resin coating with good adhesion comprises the following components in parts by weight: 90.0 parts of SIS elastomer modified water-based alkyd resin E, 15.0 parts of water-based nano color paste, 0.4 part of wetting agent, 0.2 part of thickening agent, 0.3 part of flatting agent, 0.3 part of dispersing agent, 0.4 part of defoaming agent, 4.0 parts of polyvinyl alcohol, 6.0 parts of sodium sulfate type transparent powder, 6.0 parts of propylene glycol, 6.0 parts of film forming auxiliary agent and 10.0 parts of deionized water.
Comparative example 5
An anti-sagging water-based alkyd resin coating with good adhesion comprises the following components in parts by weight: 100.0 parts of SIS elastomer modified waterborne alkyd resin A, 0.5 part of pH regulator, 0.4 part of wetting agent, 0.4 part of dispersant, 0.3 part of defoamer, 0.3 part of flatting agent, 2.0 parts of sodium sulfate type transparent powder, 6.0 parts of glycol and 15.0 parts of deionized water.
According to the relevant standards, the performance index test was performed on inventive example 4, example 5, comparative example 6 and comparative example 3, comparative example 4, comparative example 6, and the test results are shown in table 1.
Wherein, the adhesive force is as follows: the test was carried out using the cross-cut method, as specified in GB/T1720-1988;
water resistance: detecting according to the regulation of GB/T1733-93;
flexibility: detection is carried out according to the specification of GB/T1731-1993;
impact resistance: detecting according to the GB/T1732-2020;
sag resistance: detection was carried out according to the regulations of GB/T9264-2012.
Table 1: performance specification of coating
As can be seen from Table 1, examples 4, 5, 6, and comparative examples 4 and 5 of the present invention are superior in water resistance, adhesion, impact resistance, sag resistance, flexibility, and the like to those of comparative example 3 of the conventional modified aqueous alkyd resin coating, which indicates that the SIS elastomer modified aqueous alkyd resin is effective in improving water resistance, adhesion, impact resistance, sag resistance, flexibility, and the like;
as can be seen from Table 1, the fullness of examples 4, 5, 6 and 5 according to the invention is better than that of comparative example 4, which indicates that the addition of a film-forming aid during the preparation of the resin is advantageous in increasing the fullness of the paint film;
as can be seen from Table 1, the storage stability of 50. + -. 2 ℃/30d is better for examples 4, 5, 6 and 4 of the present invention than for comparative example 5, indicating that the addition of polyvinyl alcohol to the system of the present invention is effective in improving the storage stability.
The foregoing description is only preferred embodiments of the present application and is illustrative of the principles of the technology employed; it will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (3)
1. An anti-sagging water-based alkyd resin coating with good adhesion is characterized in that: the anti-sagging water-based alkyd resin coating with good adhesive force comprises the following components in parts by weight: 80.0-120.0 parts of SIS elastomer modified waterborne alkyd resin, 0.0-25.0 parts of waterborne nano color paste, 1.2-4.5 parts of auxiliary agent, 3.0-6.0 parts of polyvinyl alcohol, 2.0-18.0 parts of sodium sulfate type transparent powder, 4.0-10.0 parts of antifreezing agent and 10.0-25.0 parts of deionized water;
the SIS elastomer modified waterborne alkyd resin comprises the following components in parts by weight: 15.0-25.0 parts of unsaturated fatty acid, 2.0-5.0 parts of SIS elastomer, 4.0-8.0 parts of 3-phenyl-2-acrylic acid-2-allyl ester, 8.0-15.0 parts of organic acid anhydride, 4.0-9.0 parts of dibasic acid, 10.0-24.0 parts of polyol, 3.0-5.0 parts of styrene, 2.0-3.5 parts of benzoic acid, 0.4-1.0 part of di-tert-butyl peroxide, 10.0-20.0 parts of xylene, 3.0-6.0 parts of dimethylolbutyric acid, 0.3-0.8 part of antioxidant, 5.0-10.0 parts of film-forming assistant, 2.5-8.0 parts of neutralizer and 100.0-200.0 parts of deionized water; the preparation method of the SIS elastomer modified waterborne alkyd resin comprises the following steps:
a) uniformly stirring styrene, 3-phenyl-2-acrylic acid-2-allyl ester and 3/4 di-tert-butyl peroxide to obtain a mixed solution I;
b) sequentially adding unsaturated fatty acid, organic acid anhydride, dibasic acid, polyalcohol, dimethylolbutyric acid, antioxidant and dimethylbenzene according to the weight part of the formula in a reactor, and heating for dissolving;
c) heating to 160-162 ℃, keeping the temperature, stirring, reacting for 2.0h, adding benzoic acid to control the molecular weight, heating to 180 ℃, keeping the temperature, reacting for 2.0h, heating to 220-224 ℃ at the speed of 20 ℃/h, keeping the temperature, reacting for 1.0h, measuring the acid value every 15min, and when the acid value reaches the design value;
d) cooling, adding the SIS elastomer and 1/4 di-tert-butyl peroxide, stirring and reacting for 1.0 hour to obtain SIS elastomer grafted alkyd resin prepolymer;
e) and distilling under reduced pressure to remove xylene, adding a film-forming aid, stirring and dispersing uniformly and reducing viscosity, keeping the temperature at 120-124 ℃, dropwise adding the mixed solution I for 1.5-2.0 h, stirring and reacting for 0.5h, cooling, stirring at high speed, dispersing and adding a neutralizing agent, adding deionized water according to the formula amount, dispersing uniformly, and filtering to obtain the SIS elastomer modified waterborne alkyd resin.
2. The anti-sagging water-based alkyd resin coating with good adhesion of claim 1, wherein: the auxiliary agent is at least one of pH regulator, wetting agent, dispersant, defoaming agent, thickener and flatting agent.
3. The anti-sagging water-based alkyd resin coating with good adhesion of claim 1, wherein: the antifreezing agent is one or a combination of more of ethylene glycol, propylene glycol and glycerol.
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