CN112194946A

CN112194946A - High-adhesion water-based paint and preparation method thereof

Info

Publication number: CN112194946A
Application number: CN202011128505.8A
Authority: CN
Inventors: 王国城; 许俊杰; 周松仁
Original assignee: Hangzhou Fuyang Fuchun Coating&decorating Co ltd
Current assignee: Hangzhou Fuyang Fuchun Coating&decorating Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-01-08

Abstract

The application relates to the technical field of coatings, and particularly discloses a high-adhesion water-based coating and a preparation method thereof, wherein the high-adhesion water-based coating comprises the following raw materials in parts by weight: 35-45 parts of water-based acrylic resin; 10-20 parts of polycarbonate resin; 10-20 parts of water-based alkyd resin; 0.3-0.6 part of film-forming additive; 0.1-0.5 part of wetting agent; 0.1-0.3 part of ultraviolet absorbent; 0.05-0.08 part of isothiazolinone; 6-8 parts of butyl ether; 6-8 parts of ethanol; 25-35 parts of water; the wetting agent comprises at least one of siloxane polyoxyethylene ether and hydroxyethyl cellulose. The water-based paint has the advantage of strong adhesive force.

Description

High-adhesion water-based paint and preparation method thereof

Technical Field

The application relates to the technical field of coatings, in particular to a high-adhesion water-based coating and a preparation method thereof.

Background

The water-based paint takes water as a solvent, and has the advantages of no toxicity, environmental protection, no odor, little volatile matter, no combustion, no explosion and the like, so that the application range is wider and wider.

The glass has higher hardness, stronger barrier property and corrosion resistance, is widely applied to the fields of water cups, cosmetic bottles and the like, and generally plays a role in protecting and decorating by coating paint on the surface of a glass product. In the past, most of coatings for glass products are oil coatings, and toxic substances such as organic solvents of formaldehyde, toluene and the like are adopted as solvents, so that the environment is polluted and the human health is threatened. With the continuous development of coating technology, people gradually adopt safe and environment-friendly water-based coatings as coatings for glass products.

Through the related technology, the surface tension of the water-based paint is large, the contact angle between the water-based paint and the surface of the glass product is large, the water-based paint is difficult to wet the surface of the glass product, the adhesion of the water-based paint on the surface of the glass product is seriously affected, and the coating on the surface of the glass product is easy to damage and fall off.

Content of application

In order to improve the adhesive force of the water-based paint, the application provides the water-based paint with high adhesive force and a preparation method thereof.

In a first aspect, the application provides a high-adhesion water-based paint, which adopts the following technical scheme:

a high-adhesion water-based paint comprises the following raw materials in parts by weight:

35-45 parts of water-based acrylic resin;

10-20 parts of polycarbonate resin;

10-20 parts of water-based alkyd resin;

0.3-0.6 part of film-forming additive;

0.1-0.5 part of wetting agent;

0.1-0.3 part of ultraviolet absorbent;

0.05-0.08 part of isothiazolinone;

6-8 parts of butyl ether;

6-8 parts of ethanol;

25-35 parts of water;

the wetting agent comprises at least one of siloxane polyoxyethylene ether and hydroxyethyl cellulose.

By adopting the technical scheme, the water-based acrylic resin, the polycarbonate resin and the water-based alkyd resin are used as film forming substances, and the film forming auxiliary agent and the wetting agent are added for mutual matching, so that the surface tension of the water-based paint is reduced, and the adhesive force of the water-based paint on the surface of a glass product is improved; the wetting agent adopts siloxane polyoxyethylene ether and hydroxyethyl cellulose which can reduce the surface tension, so that the wetting agent is mutually cooperated with the water-based acrylic resin, the polycarbonate resin and the water-based alkyd resin to improve the adhesive capacity of the water-based paint on the glass surface. The polycarbonate is easy to degrade under the action of ultraviolet rays, so that yellowing occurs, the toughness is greatly reduced, and the ultraviolet ray absorbent is added, so that the polycarbonate has good shielding capacity on the ultraviolet rays, the anti-aging performance is improved, and the polycarbonate is matched with the water-based acrylic resin and the polycarbonate resin, so that the adhesive force of the water-based paint on the surface of a glass product is improved. In addition, the addition of the antiseptic isothiazolinone reduces the pollution of microorganisms in the water-based paint, thereby improving the coating quality of the water-based paint and prolonging the service life of the high-adhesion water-based paint. Butyl ether, ethanol and water are used as solvents to adjust the viscosity of the water-based paint and promote the mutual fusion of the raw materials of the water-based paint.

Preferably, the coalescing agent consists of propylene glycol butyl ether and lauryl alcohol ester.

By adopting the technical scheme, the film-forming auxiliary agent adopts micromolecule propylene glycol monobutyl ether and dodecyl glycol to be matched with each other, has good compatibility with water-based acrylic resin, polycarbonate resin and water-based alkyd resin, can enter between macromolecule chain segments of the three resins, reduces interaction force, effectively increases the adhesive force of the high-adhesive-force water-based paint on a glass product to a certain extent, reduces the tendency of brittle fracture and fracture of the water-based paint, and improves the wear resistance of the water-based paint.

Preferably, the ratio of the film forming aid propylene glycol butyl ether to the dodecanol ester by weight is 1 (1-1.5).

By adopting the technical scheme, the film-forming auxiliary agent adopts the weight proportion, has good matching effect and good compatibility with the waterborne acrylic resin, the polycarbonate resin and the waterborne alkyd resin.

Preferably, the raw material of the high-adhesion water-based paint also comprises 0.2-0.4 part by weight of defoaming agent.

By adopting the technical scheme, the defoaming agent is dispersed in the high-adhesion water-based paint system, so that bubbles generated in the production process of the water-based paint are reduced, the influence on the flatness of the surface of the water-based paint due to the penetration of the water-based paint coating by the bubbles is reduced, and the attractiveness is poor.

Preferably, the defoaming agent consists of 0.1 to 0.2 parts by weight of ethylene glycol siloxane and 0.1 to 0.2 parts by weight of butylene diacrylate.

By adopting the technical scheme, the polydimethylsiloxane and the butylene diacrylate are matched with each other, so that bubbles generated in the production process of the water-based paint are reduced, and the surface smoothness of the water-based paint coating of the high-adhesion water-based paint is improved.

Preferably, the ultraviolet absorbent is modified titanium dioxide, and the modified titanium dioxide comprises the following raw materials:

0.08-0.25 part of titanium dioxide;

0.1-0.3 part of silane coupling agent;

0.006-0.012 part of triethylamine;

2-6 parts of toluene.

By adopting the technical scheme, after titanium dioxide is added into a water-based paint system, the titanium dioxide is high in surface energy, easy to agglomerate and incapable of being well dispersed in polycarbonate, so that the water-based paint is poor in uniformity and poor in ultraviolet absorption effect; the titanium dioxide is modified by adopting the silane coupling agent, so that the compatibility of the modified titanium dioxide and the polycarbonate is improved, and the adhesion effect of the polycarbonate on the surface of the glass product is improved; meanwhile, the hardness of the titanium dioxide is higher, and the hardness and the wear resistance of the water-based paint are improved by matching with the water-based paint.

The modified titanium dioxide is prepared by the following steps:

a1, mixing titanium dioxide with toluene, a silane coupling agent and triethylamine, and uniformly dispersing in an ice water bath to obtain a first mixture;

a2, heating the first mixture at 105-115 ℃, and refluxing and stirring the mixture until the reaction is finished;

a3, cooling and suction filtering after the reaction is finished, and washing a filter cake formed after suction filtering;

and A4, drying the washed filter cake to obtain the modified nano titanium dioxide.

By adopting the technical scheme, the titanium dioxide is fully contacted with the silane coupling agent, and is washed after the reaction and the suction filtration are finished, so that the raw materials which are not completely reacted on the surface of the modified titanium dioxide are washed away, the purity of the nano titanium dioxide is improved, and the influence of impurities remained in the reaction on the water-based paint is reduced.

Preferably, the drying temperature in the step A4 is controlled to be 80-90 ℃.

By adopting the technical scheme, the effect of ultraviolet absorption of the modified titanium dioxide is improved by controlling the drying temperature; the temperature is too low, and the drying time is longer; the drying temperature is higher, and the ultraviolet absorption function of the modified titanium dioxide is weakened to a certain extent.

In a second aspect, the application provides a preparation method of a high-adhesion water-based paint, which adopts the following technical scheme:

a preparation method of a high-adhesion water-based paint comprises the following steps:

b1, mixing the water-based acrylic resin, the polycarbonate resin, the water-based alkyd resin and water to obtain a diluted film forming material;

b2, mixing the diluted film forming material with a film forming additive, a wetting agent, butyl ether and ethanol, and uniformly mixing to obtain a second mixture;

and B3, mixing the second mixture with an ultraviolet absorbent, isothiazolinone and a defoaming agent, and uniformly mixing to obtain the high-adhesion water-based paint.

By adopting the technical scheme, firstly, the waterborne acrylic resin, the polycarbonate resin, the waterborne alkyd resin and water are fused and diluted so as to be uniformly mixed; then adding raw materials such as film forming auxiliary agent, wetting agent and the like, fully playing the role of each raw material, and mutually cooperating with the diluted film forming material to ensure that the adhesive force of the water-based paint is uniformly dispersed.

Preferably, the film forming aid in the step B2 is slowly added into the diluted film forming material and stirred, and the speed of adding the film forming aid is 0.01-0.02 part/min.

By adopting the technical scheme, the water-based acrylic resin is easily flocculated due to the excessively fast addition of the film-forming additive

Slowly adding the mixture and stirring the mixture to reduce the generation of flocculate so as to uniformly disperse the high-adhesion water-based paint.

In summary, the present application has the following beneficial effects:

1. because the water-based acrylic resin, the polycarbonate resin and the water-based alkyd resin are used as film forming substances, water is used as a solvent, and the surface tension of the water-based paint is reduced by adding a film forming auxiliary agent and a wetting agent; meanwhile, the siloxane polyoxyethylene ether with hydrophilic groups in the wetting agent and the hydroxyethyl cellulose are mutually cooperated, so that the adhesive force of the water-based paint on the surface of the glass product is further improved. Meanwhile, the polycarbonate interacts with the ultraviolet absorbent, so that the yellowing phenomenon of the polycarbonate caused by the irradiation of ultraviolet rays is reduced, and the toughness of the high-adhesion water-based paint is reduced. The antiseptic isothiazolinone can reduce microbial pollution in water paint, raise antiseptic and anticorrosive effect and prolong the service life of high adhesion water paint. The surface tension of the water-based paint is reduced, so that the adhesion of the water-based paint to the surface of the glass product is improved.

2. In the application, the combination of a micromolecular film-forming aid propylene glycol monobutyl ether and a dodecyl glycol ester is preferably adopted, so that the acting force among macromolecular chain segments of the water-based acrylic resin, the polycarbonate resin and the water-based alkyd resin is reduced, and the adhesive force of the water-based paint is improved; in addition, the defoaming agent is added into the raw material of the water-based paint, so that the defoaming agent is uniformly dispersed in a water-based paint system, and the damage to the flatness of a coating caused by bubbles generated in the mixing process of the water-based paint is reduced; in addition, the titanium dioxide is modified by preparing the ultraviolet absorbent, so that the agglomeration is reduced, the compatibility with the polycarbonate is improved, and the adhesion effect of the polycarbonate on the surface of the glass product is improved; meanwhile, the hardness of the titanium dioxide is higher, and the hardness and the wear resistance of the water-based paint are improved by matching with the water-based paint.

3. According to the method, the raw materials are mixed step by step, the speed of the film forming aid is controlled, the components are uniformly mixed as much as possible, the high-adhesion water-based paint is uniformly mixed, the dispersion effect is improved, and the water-based paint is uniformly adhered to the surface of a glass product.

Detailed Description

The present application is described in further detail below.

Example 1:

the high-adhesion water-based paint comprises the following specific components in parts by weight as shown in Table 1, and is prepared by the following steps:

b1, mixing the water-based acrylic resin, the polycarbonate resin, the water-based alkyd resin and water, and uniformly mixing to obtain a diluted film forming material;

and B2, slowly and uniformly adding the film-forming aid into the diluted film-forming material, and stirring, wherein the speed of adding the film-forming aid is 0.01 kg/min. After the film forming additive is added, adding a wetting agent, butyl ether and ethanol for mixing, and uniformly mixing to obtain a second mixture;

and B3, mixing the second mixture with the modified titanium dioxide, the isothiazolinone and the defoaming agent, and uniformly mixing to obtain the high-adhesion water-based paint.

The preparation method of the modified titanium dioxide in the step B3 is as follows:

a1, placing titanium dioxide in a four-neck flask, adding toluene, a silane coupling agent and triethylamine for mixing, and performing ultrasonic dispersion in an ice water bath for 30min to obtain a first mixture after uniform dispersion;

a2, heating the first mixture at 110 ℃, keeping ventilation, refluxing and stirring till the reaction is finished;

a3, after the reaction is finished, carrying out low-pressure suction filtration after cooling, and washing a filter cake formed after suction filtration by using acetone;

and A4, placing the washed filter cake in an oven, and drying to obtain the modified nano titanium dioxide.

Example 2 a high adhesion water-based paint, which is different from example 1 in specific components and weights, and includes specific components and weights as shown in table 1.

Examples 3-5A high adhesion waterborne coating differs from example 1 in the film forming aid components and weight ratios included are as shown in Table 1.

Examples 6 to 7A high adhesion water-based paint, which is different from example 4 in that it contains a defoaming agent, and includes specific components and weights shown in Table 1.

TABLE 1 specific compositions and weights of examples 1-7

Example 8A high adhesion waterborne coating differs from example 6 in that the defoamer is replaced with an equal amount of phenethyl alcohol oleate.

Example 9A high adhesion waterborne coating differs from example 1 in that unmodified titanium dioxide is used in place of the modified silica.

Example 10A high-adhesion water-based paint, which is different from example 8 in that the baking temperature in step A4 was 90 ℃.

Example 11A high adhesion waterborne coating differing from example 1 in that the coalescent was added at a rate of 0.02kg/min in step B3.

Example 12A high adhesion waterborne coating differing from example 1 in that the coalescent was added at a rate of 0.03 kg/min.

Comparative example 1A waterborne coating differs from example 9 in that the polycarbonate and waterborne alkyd are replaced with equal amounts of waterborne acrylic resin.

Comparative example 2 an aqueous coating material was distinguished from example 9 in that an equal amount of an aqueous acrylic resin was used instead of the polycarbonate resin.

Comparative example 3 a waterborne coating differs from example 9 in that the waterborne alkyd is replaced with an equal amount of waterborne acrylic resin.

Comparative example 4 a water-borne coating differs from example 9 in that the wetting agent is replaced by an equal amount of water.

Comparative example 5A waterborne coating differs from example 9 in that the coalescent was replaced with an equal amount of water.

Comparative example 6A water-based paint consisting of the following components: 32 percent of acrylic resin, 28 percent of epoxy polyurethane synthetic resin, 1 percent of silane coupling agent, 13 percent of amino resin, 0.1 percent of wetting agent alkylaryl polyether alcohol, 1 percent of flatting agent, 0.5 percent of thickening agent polyurethane association, 0.4 percent of defoaming agent silicone modified composition, 9 percent of isocyanate curing agent and the balance of deionized water.

The preparation method comprises the following steps: adding acrylic resin, epoxy polyurethane synthetic resin, a silane coupling agent and amino resin into a reaction container in sequence for mixing, stirring and dispersing for 20min by a stirrer at the stirring speed of 1200r/min, then adding a wetting agent, a leveling agent, a thickening agent and an antifoaming agent into the dispersed mixed components in sequence, stirring and dispersing for 15min at the stirring speed of 800r/min, then adding an isocyanate curing agent and deionized water, stirring and dispersing for 5min at the stirring speed of 300r/min, and obtaining the finished product of the water-based paint.

Detection method

Experiment one: rubber friction experiment experimental sample: examples 1 to 12 and comparative examples 1 to 6 were uniformly coated on the surfaces of glass bottles, and the glass bottles coated in examples 1 to 12 were designated as experimental samples 1 to 12, respectively, and the glass bottles coated in comparative examples 1 to 6 were designated as comparative samples 1 to 6, respectively.

An experimental instrument: the glass bottle has a main body diameter of 40mm and a height of 120 mm; a friction tester: the brand is Shenzhen Fan friend science and technology Limited, and the model is as follows: ABR-007; rubber: the specification is CS-8; weight: 175 g.

The experimental method comprises the following steps:

(1) the test sample 1 was fixed to a jig of a friction test machine, and a rubber for friction was fixed.

(2) Pre-rubbing, namely, starting the machine for rubbing for three times, observing whether a rubbed area (namely the middle area of the bottle body of the glass bottle) is proper or not, observing whether the experimental sample 1 is displaced or not, and adjusting the rubbing head and the experimental sample to proper positions.

(3) A175 g weight load was applied to the upper part of the rubbing head, and the surface of the rubbed area of the test specimen 1 was wiped for 50 times with a stroke of 20 mm.

(4) After the experiment, the surface abrasion degree of the experimental sample 1 was observed.

Rubber rub tests were performed on test samples 2-12 and comparative samples 1-6 according to the above test method.

Evaluation criteria: the evaluation criteria are shown in table 2.

TABLE 2 evaluation criteria

Coating grade	Surface of rubbed area of glass bottle
		1	The damage degree of the coating is large, and the peeling area is more than 50 percent;
2	the damage degree of the coating is moderate, and the peeling area is 31 to 50 percent
		3	The damage degree of the coating is small, and the peeling area is 16 to 30 percent
4	The coating is partially peeled off, and the peeling area is 5 to 15 percent
		5	The coating flakes are peeled off, and the peeling area is less than 5 percent
6	The coating surface is not peeled off and has a few scratches
		7	The coating surface is not peeled off and has no scratch
8	The coating surface is not peeled off and has no scratch

The experimental results are as follows: the results of the rubber friction test for the test samples 1 to 12 and the comparative samples 1 to 6 are shown in Table 3.

TABLE 3 rubber rub test results for test samples 1-12 and comparative samples 1-6

Sample (I)	Grade	Sample (I)	Grade
				Experimental sample 1	5	Experimental sample 10	5
Experimental sample 2	5	Experimental sample 11	5
				Experimental sample 3	5	Experimental sample 12	4
Experimental sample 4	6	Comparative sample 1	1
				Experimental sample 5	6	Comparative sample 2	2
Experimental sample 6	7	Comparative sample 3	2
				Experimental sample 7	7	Comparative sample 4	2
Experimental sample 8	6	Comparative sample 5	3
				Experimental sample 9	4	Comparative sample 6	3

As can be seen from the experimental data in tables 2 and 3, the peeling degrees of the water-based paint coatings on the surfaces of the glass bottles are different according to the content of each component in the experimental samples 1 to 12 and the comparative samples 1 to 6, and the coating grades in the experimental samples 1 to 12 are 4 to 7, which indicates that the water-based paint coatings on the glass bottles have better adhesive force; the coating grades of the comparative samples 1-6 are 1-3, and the peeling areas are large, which shows that the water-based paint prepared by the formula of the application has high adhesive force and strong wear resistance.

As can be seen from comparison of the experimental samples 1 to 2 and the comparative samples 1 to 4, the adhesion of the water-based paint was improved by adding the water-based acrylic resin, the polyester resin, the polycarbonate resin, and the water-based alkyd resin. Because the coating prepared from the water-based acrylic resin has poor flexibility and wear resistance, the wear resistance of the water-based paint is improved by adding polycarbonate with strong flexibility and water-based alkyd resin; meanwhile, by adding the siloxane polyoxyethylene ether and the hydroxyethyl cellulose serving as wetting agents, the hydrophilic group in the wetting agent reduces the surface tension, so that the high-adhesion water-based paint is tightly adhered to the surface of the glass bottle, and the adhesion of the water-based paint is improved.

The comparison experiment samples 3-5 and the comparison sample 5 show that small molecular film forming aids, namely propylene glycol butyl ether and dodecyl glycol ester, are added to be matched with each other, so that the waterborne acrylic resin, the polyester resin, the polycarbonate resin and the waterborne alkyd resin have good compatibility, can be filled between broken chains of macromolecules, increases the distance, weakens the interaction force among the resins, eliminates the internal stress, reduces the brittle fracture and easy fracture state of a waterborne coating, and improves the adhesion capacity and the wear resistance of the waterborne coating on the surface of a glass bottle to a certain extent. In addition, the film forming assistant softens the surface of the resin, improves the plasticity of the water-based paint, and is easier to fuse and form a film, thereby improving the film forming speed of the water-based paint. In the drying process of the water-based paint, the residual film-forming auxiliary agent after the water is volatilized enables the resin colloidal particles to be mutually fused into a continuous film, so that the hardness of the water-based paint is improved.

Compared with the experiment sample 4 and the experiment samples 6-8, the defoaming agent ethylene glycol siloxane and the butylene diacrylate are dispersed in the high-adhesion water-based paint system, so that bubbles generated in the production process of the water-based paint are reduced, and the influence on the flatness of the surface of the water-based paint caused by the penetration of the water-based paint coating by the bubbles is reduced; the defoaming active substance in the defoaming agent is directly grafted on a carrier substance to form a polymer, the molecular chain of the polymer has a wetting effect, and the adhesion performance of the water-based paint is improved by matching with a wetting agent; the butylene diacrylate and the resin are mutually cooperated, so that the viscosity of the water-based paint system is improved, and the stability of the water-based paint system is kept.

Comparing the experimental sample 1 and the experimental sample 9, it can be seen that the adhesion performance by adding the modified titanium dioxide is better than that of the unmodified titanium dioxide; because the surface energy of the titanium dioxide is high, the titanium dioxide is easy to agglomerate, the modified titanium dioxide is not easy to agglomerate and is uniformly dispersed around the polycarbonate by modifying the titanium dioxide, the phenomena of polycarbonate degradation and yellowing caused by ultraviolet irradiation are reduced, the glass bottle coated with the high-adhesion water-based paint can be placed in more environments in the transportation or use process, and the ageing resistance and the wear resistance of the water-based paint are improved.

Comparing the experimental sample 1 and the experimental samples 11-12, it can be seen that the film-forming aid is added too fast, and the adhesion effect of the high-adhesion water-based paint is poor, because the water-based acrylic resin is flocculated due to the excessive addition of the film-forming aid. By slowly adding and stirring, the film-forming aid is fully mixed with the waterborne acrylic resin, the polyester resin, the polycarbonate resin and the waterborne alkyd resin, so that the generation of flocculate is reduced, and the adhesion capability of the waterborne coating on the surface of a glass bottle is improved.

Experiment two: simulation transportation vibration experiment method experimental sample: examples 1 to 12 and comparative examples 1 to 6 were uniformly coated on the surfaces of glass bottles, and the glass bottles coated in examples 1 to 12 were designated as experimental samples 1 to 12, respectively, and the glass bottles coated in comparative examples 1 to 6 were designated as comparative samples 1 to 6, respectively.

An experimental instrument: the glass bottle has a main body diameter of 40mm and a height of 120 mm; simulating a transportation vibration experiment machine: the brand is Lanbo instrument, and the model is LB-ZD 100.

The experimental method comprises the following steps:

(1) after the transportation package with the experimental sample 1 is inspected, the transportation package is placed on the simulated transportation vibration table, and a gap of 3cm is reserved between the experimental sample 1 and the periphery of the fence of the simulated transportation vibration table, so that the experimental sample 1 does not need to be clamped.

(2) The experimental speed of the simulated transport shaker is shown in Table 4 (this experiment set the experimental speed of the simulated transport shaker at 210r/min, frequency at 3.5Hz, and test time at 66 min).

TABLE 4 Experimental speed, corresponding frequency and test time

Test speed (r/min)	Corresponding frequency (Hz)	Test time (min)
			150	2.5	95
180	3.0	79
			210	33.5	66
240	4.0	60
			270	4.5	53
300	5.0	48

(3) After the experiment, the surface coating condition of the experimental sample 1 was observed.

The test samples 2 to 12 and the comparative samples 1 to 6 were subjected to the simulated transportation vibration test according to the above test method.

Evaluation criteria: the evaluation criteria are shown in table 2.

The experimental results are as follows: the results of the simulated transportation vibration test for the test samples 1 to 12 and the comparative samples 1 to 6 are shown in Table 5.

TABLE 5 results of simulated transportation shock test of test samples 1-12 and comparative samples 1-6

Sample (I)	Grade	Sample (I)	Grade
				Experimental sample 1	6	Experimental sample 10	6
Experimental sample 2	5	Experimental sample 11	6
				Experimental sample 3	6	Experimental sample 12	5
Experimental sample 4	7	Comparative sample 1	2
				Experimental sample 5	7	Comparative sample 2	3
Experimental sample 6	8	Comparative sample 3	3
				Experimental sample 7	8	Comparative sample 4	3
Experimental sample 8	7	Comparative sample 5	4
				Experimental sample 9	5	Comparative sample 6	3

As can be seen from the experimental data in tables 4 and 5, the coating grades in the experimental samples 1-12 are 5-7, which indicates that the glass bottles indicate that the water-based paint coating adhesion is good; the coating grades of the comparative samples 1-6 are 2-4, and the peeling areas are large, so that the water-based paint prepared by the formula disclosed by the application has high adhesive force and strong wear resistance, and the falling degree is relatively small when a simulated transportation vibration experiment is detected in a designated area compared with an eraser friction experiment.

Comparing the experimental samples 1 to 3 and the comparative samples 1 to 4, it can be seen that the wear resistance of the water-based paint is improved by adding the polycarbonate with strong flexibility and the water-based alkyd resin because the coating made of the water-based acrylic resin has poor flexibility and wear resistance; the wetting agents siloxane polyoxyethylene ether and hydroxyethyl cellulose are added to reduce the surface tension, so that the high-adhesion water-based paint is tightly bonded on the surface of the glass bottle, and the adhesion of the water-based paint is improved.

Compared with the experimental samples 3-5 and the comparative sample 5, the micromolecule film forming additives, namely propylene glycol monobutyl ether and dodecyl glycol ester are added and matched with each other, and meanwhile, the waterborne acrylic resin, the polyester resin, the polycarbonate resin and the waterborne alkyd resin have good compatibility, so that the brittle fracture and easy-to-break state of a waterborne coating is reduced, and the adhesion capability and the wear resistance of the waterborne coating on the surface of a glass bottle are improved. Comparing the experimental sample 4 with the experimental sample 6-8, the defoaming agent is dispersed in the high-adhesion water-based paint system, the defoaming active substance in the defoaming agent is directly grafted on the carrier substance to form a polymer, the molecular chain of the polymer has a wetting effect, and the wetting agent is matched with the defoaming active substance to jointly realize the adhesion performance of the water-based paint.

Comparing the experimental sample 1 and the experimental sample 9, it can be seen that the titanium dioxide is very easy to agglomerate due to the higher surface energy of the titanium dioxide, and the modified titanium dioxide is not easy to agglomerate by modifying the titanium dioxide, so that the phenomena of polycarbonate degradation and yellowing caused by ultraviolet irradiation are reduced, and the adhesion capability of the water-based paint is improved.

Comparing the experimental sample 1 with the experimental samples 11-12, it can be known that the addition of the film-forming assistant is too fast, which causes the flocculation of the water-based acrylic resin, so that the adhesion effect of the high-adhesion water-based paint is poor; by slowly adding and stirring, the film-forming aid is fully mixed with the waterborne acrylic resin, the polyester resin, the polycarbonate resin and the waterborne alkyd resin, so that the generation of flocculate is reduced, and the adhesion effect of the waterborne coating on the surface of a glass bottle is improved.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. A high-adhesion water-based paint is characterized in that: the feed comprises the following raw materials in parts by weight:

35-45 parts of water-based acrylic resin;

10-20 parts of polycarbonate resin;

10-20 parts of water-based alkyd resin;

0.3-0.6 part of film-forming additive;

0.1-0.5 part of wetting agent;

0.1-0.3 part of ultraviolet absorbent;

0.05-0.08 part of isothiazolinone;

6-8 parts of butyl ether;

6-8 parts of ethanol;

25-35 parts of water;

2. The high-adhesion water-based paint according to claim 1, characterized in that: the film-forming assistant consists of propylene glycol butyl ether and lauryl alcohol ester.

3. The high-adhesion water-based paint according to claim 2, characterized in that: the weight portion ratio of the film forming additive propylene glycol butyl ether to the dodecanol ester is 1 (1-1.5).

4. The high-adhesion water-based paint according to claim 1, characterized in that: the raw materials of the high-adhesion water-based paint also comprise 0.2-0.4 part by weight of defoaming agent.

5. The high-adhesion water-based paint according to claim 4, wherein: the defoaming agent consists of 0.1 to 0.2 weight part of ethylene glycol siloxane and 0.1 to 0.2 weight part of butylene diacrylate.

6. The high-adhesion water-based paint as claimed in claim 1, wherein: the ultraviolet absorbent is modified titanium dioxide, and the modified titanium dioxide comprises the following raw materials:

0.08-0.25 part of titanium dioxide;

0.1-0.3 part of silane coupling agent;

0.006-0.012 part of triethylamine;

2-6 parts of toluene.

7. The high-adhesion water-based paint according to claim 6, wherein: the modified titanium dioxide is prepared by the following steps:

8. The high-adhesion water-based paint according to any one of claim 7, wherein: and in the step A4, the drying temperature is controlled to be 80-90 ℃.

9. The method for preparing a high-adhesion water-based paint according to any one of claims 1 to 8, wherein: the method comprises the following steps:

10. The preparation method of the high-adhesion water-based paint according to claim 9, characterized in that: and B2, uniformly adding the film forming aid into the diluted film forming material, and stirring, wherein the speed of adding the film forming aid is 0.01-0.02 part/min.