阅读说明：本技术 一种变色雨衣 (Color-changing raincoat ) 是由 程良杭 于 2021-09-09 设计创作，主要内容包括：本申请涉及雨衣的技术领域,具体公开了一种变色雨衣,包括雨衣本体、印刷于雨衣本体表面的图案层以及用于遮盖图案层的遮盖层；所述遮盖层包括40-55份环氧-丙烯酸树脂乳液,3-9份水性聚氨酯乳液,12-18份二氧化硅,10-18份贝壳粉,1-2份聚乙烯蜡,2-5份消泡剂,1-2份流平剂,4-9份稀释剂；另外,本申请的变色雨衣具有减少雨衣表面遮盖层的脱落优点。(The application relates to the technical field of raincoats, and particularly discloses a color-changing raincoat, which comprises a raincoat body, a pattern layer printed on the surface of the raincoat body and a covering layer used for covering the pattern layer; the covering layer comprises 40-55 parts of epoxy-acrylic resin emulsion, 3-9 parts of aqueous polyurethane emulsion, 12-18 parts of silicon dioxide, 10-18 parts of shell powder, 1-2 parts of polyethylene wax, 2-5 parts of defoaming agent, 1-2 parts of flatting agent and 4-9 parts of diluent; in addition, the raincoat that discolours of this application has the advantage that drops that reduces raincoat surface and cover the layer.)

1. A color-changing raincoat is characterized in that: comprises a raincoat body, a pattern layer printed on the surface of the raincoat body and a covering layer used for covering the pattern layer; the covering layer comprises, by weight, 40-55 parts of epoxy-acrylic resin emulsion, 12-18 parts of aqueous polyurethane emulsion, 9-18 parts of silicon dioxide, 10-18 parts of shell powder, 1-2 parts of polyethylene wax, 2-5 parts of an antifoaming agent, 1-2 parts of a leveling agent and 4-9 parts of a diluent.

2. The color-changing raincoat according to claim 1, wherein: the covering layer comprises, by weight, 48-50 parts of epoxy-acrylic resin emulsion, 14-16 parts of aqueous polyurethane emulsion, 13-15 parts of silicon dioxide, 14-16 parts of shell powder, 1.5 parts of polyethylene wax, 3 parts of a defoaming agent, 1.5 parts of a leveling agent and 7 parts of a diluent.

3. The color-changing raincoat according to claim 1, wherein: the shell powder is prepared by the following process: (1) washing and drying 15-20 parts of shell, and soaking the shell in a sodium hydroxide solution with the mass fraction of 2% for 24 hours while keeping stirring; (2) taking out the obtained shell, placing the shell in an environment with the temperature of 100-120 ℃ for heating for 6-8h, taking out the shell for vibration screening, removing the fallen impurities, and (3) washing the shell obtained in the step (2) with water, drying, grinding, crushing and sieving to obtain the shell powder.

4. The color-changing raincoat according to claim 3, wherein: the average particle size of the shell powder is 100nm-300 nm.

5. The color-changing raincoat according to claim 1, wherein: the silicon dioxide is prepared by the following process: (1) uniformly mixing 60 parts of anhydrous ethanol and 25 parts of ammonia water to obtain a mixed solution, then adding 30 parts of tetraethoxysilane into the mixed solution, continuously stirring at room temperature and keeping for 5 hours to obtain a suspension, and (2) taking 3 parts of silane coupling agent and dissolving in 10 parts of anhydrous ethanol, then adding the obtained solution into the suspension obtained in the step (1), reacting for 48 hours at room temperature, then centrifuging and washing for multiple times, and finally drying to obtain silicon dioxide.

6. The color-changing raincoat according to claim 1, wherein: the defoaming agent is one or a mixture of two of emulsified silicone oil and polydimethylsiloxane.

7. The color-changing raincoat according to claim 1, wherein: the leveling agent is a fluorine leveling agent.

8. The color-changing raincoat according to claim 1, wherein: the diluent is a mixture of distilled water and glycol, and the mass ratio of the distilled water to the glycol is 1: 1.

Technical Field

The application relates to the technical field of raincoats, and more specifically relates to a color-changing raincoat.

Background

The color-changing raincoat is a new raincoat with special color, occupies a larger share in the consumer market, and particularly has strong interest in the color-changing raincoat for groups such as kindergartens, pupils and the like.

The color-changing raincoat is characterized in that a pattern layer with patterns is printed on the surface of the raincoat, then a covering layer is printed on the pattern layer, the covering layer is color-changing ink, the components of the color-changing ink are acrylate emulsion generally, substances such as calcium carbonate powder are added, the color-changing ink is in a white state at ordinary times, the pattern layer can be covered, and when raining, the original white state of the color-changing ink can be changed into a transparent state after rainwater, so that the color of the pattern layer on the surface of the raincoat can be displayed.

Because the raincoat needs to be worn on the body, the surface of the raincoat has more friction when the raincoat is used, and the covering layer on the surface is easy to wear and drop when the raincoat is used for a long time, so that the covering power of the pattern layer on the surface of the raincoat is reduced.

Disclosure of Invention

In order to reduce the shedding of the raincoat surface covering layer, the application provides a color-changing raincoat.

The application provides a raincoat that discolours adopts following technical scheme:

a color-changing raincoat comprises a raincoat body, a pattern layer printed on the surface of the raincoat body and a covering layer used for covering the pattern layer; the covering layer comprises 40-55 parts of epoxy-acrylic resin emulsion, 3-9 parts of aqueous polyurethane emulsion, 12-18 parts of silicon dioxide, 10-18 parts of shell powder, 1-2 parts of polyethylene wax, 2-5 parts of defoaming agent, 1-2 parts of flatting agent and 4-9 parts of diluent.

By adopting the technical scheme, the covering layer takes the epoxy-acrylic resin emulsion as a connecting material, has the characteristics of high drying speed and good adhesive force, and can improve the adhesive force between the covering layer and the raincoat body so as to reduce the possibility of falling off of the covering layer; the waterborne polyurethane emulsion serving as a dispersion system of the covering layer has the advantages of easiness in film forming and good wear resistance, and is matched with the epoxy-acrylic resin emulsion, so that the covering layer printed on the surface of the raincoat body has better mechanical property and is not easy to fall off. In addition, polyethylene wax as an abrasion resistant machine can improve the mechanical strength when being distributed in the system, and can reduce the possibility of being scraped off under the action of the polyethylene wax when the surface of the covering layer is rubbed. Shell powder and silica not only are regarded as the filler, can be used for improving the wearability and the adhesion strength of hiding the layer, can also improve the effect of hiding to the pattern layer when dry to because the porous structure of silica, can improve the sensitivity of hiding the layer to moisture, improve the effect that the layer becomes transparent in order to expose the pattern layer when meetting the rainwater.

Preferably, the covering layer comprises 48-50 parts of epoxy-acrylic resin emulsion, 14-16 parts of aqueous polyurethane emulsion, 13-15 parts of silicon dioxide, 14-16 parts of shell powder, 1.5 parts of polyethylene wax, 3 parts of defoaming agent, 1.5 parts of leveling agent and 7 parts of diluent.

By adopting the technical scheme and further optimizing the formula, the obtained covering layer has better anti-falling performance

Preferably, the shell powder is prepared by the following process: (1) washing and drying 15-20 parts of shell, and soaking the shell in a sodium hydroxide solution with the mass fraction of 2% for 24 hours while keeping stirring; (2) taking out the obtained shell, placing the shell in an environment with the temperature of 100-120 ℃ for heating for 6-8h, taking out the shell for vibration screening, removing the fallen impurities, and (3) washing the shell obtained in the step (2) with water, drying, grinding, crushing and sieving to obtain the shell powder.

By adopting the technical scheme, the main component of the shell is calcium carbonate, and the horny layer with brown parts on the surface of the shell can be removed after alkali liquor treatment, so that the influence of the horny layer part on the transparency of the covering layer in rainwater can be reduced.

Preferably, the average particle size of the shell powder is 100nm-300 nm.

Through adopting above-mentioned technical scheme, the particle diameter of shell powder is little, can improve the mobility and the small-size effect of whole system for after the cover layer is printed on raincoat ontology, the cover layer has inseparabler smooth effect, thereby further reduces the possibility that cover layer surface drops because of the friction.

Preferably, the silica is prepared by the following process: (1) uniformly mixing 60 parts of anhydrous ethanol and 25 parts of ammonia water to obtain a mixed solution, then adding 30 parts of tetraethoxysilane into the mixed solution, continuously stirring at room temperature and keeping for 5 hours to obtain a suspension, and (2) taking 3 parts of silane coupling agent and dissolving in 10 parts of anhydrous ethanol, then adding the obtained solution into the suspension obtained in the step (1), reacting for 48 hours at room temperature, then centrifuging and washing for multiple times, and finally drying to obtain silicon dioxide.

By adopting the technical scheme, the silane coupling agent contains silicon alkoxy, and can be condensed with hydroxyl on the surface of silicon dioxide, so that the surface of the silicon dioxide is modified, and the distribution uniformity of the silicon dioxide in a system can be improved.

Preferably, the defoaming agent is one or a mixture of two of emulsified silicone oil and polydimethylsiloxane.

By adopting the technical scheme, the defoaming agent can reduce the surface tension of the system, so that the possibility of generating bubbles in the system is reduced, and the surface smoothness of the covering layer is improved.

Preferably, the leveling agent is a fluorine-based leveling agent.

Through adopting above-mentioned technical scheme, the cover layer that fluorine flatting agent obtained has the characteristics that wetting nature is good to can obtain smooth level and smooth cover layer, and make cover layer have the sensitivity to water easily, make the rainwater discolour more fast.

Preferably, the diluent is a mixture of distilled water and glycol, and the mass ratio of the distilled water to the glycol is 1: 1.

Through adopting above-mentioned technical scheme, the viscosity of system can suitably be reduced to the thinner to make the system more easily print on raincoat ontology through modes such as screen printing.

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

1. because the epoxy-acrylic resin emulsion is used as the connecting material and the waterborne polyurethane emulsion is used as the dispersion system of the covering layer, the obtained covering layer has the advantages of high drying speed, good adhesive force, easiness in film formation and good wear resistance, so that the adhesive force between the covering layer and the raincoat body can be improved, and the possibility of falling off of the covering layer is reduced.

2. Add in this application and have silica and shell powder, not only can improve the mechanical properties of covering the layer, moreover because silica is porous and the surface has more hydroxyl for the sensitivity of covering the layer to water is faster, the speed of discolouring when improving raincoat rainwater.

Detailed Description

The epoxy-acrylic resin emulsion in this application was purchased from kepler biotechnology, ltd, Shandong; selecting shell as clam shell; the aqueous polyurethane emulsion is purchased from Wenzhou national Shibang Polymer materials, Inc.; the emulsified silicone oil is purchased from Haizhizi New chemical materials GmbH; silane coupling agent (KH-570) was purchased from Changzhou Xinze Polymer materials, Inc.; the fluorine modified polyacrylate leveling agent (P-5626) was purchased from Poioshang environmental protection technologies, Inc. of Guangzhou.

Preparation example 1

The preparation method of the shell powder comprises the following steps: (1) cleaning 15kg of shells with clear water, and during cleaning, putting the shells into an ultrasonic cleaning machine for ultrasonic cleaning to remove impurities such as silt on the surfaces of the shells; preparing a sodium hydroxide solution with the mass fraction of 2% so that the shells are completely immersed in the sodium hydroxide solution for 24 hours and are continuously stirred in the immersion process; (2) filtering the obtained shell, taking out, placing the shell in an environment of 110 ℃ for high-temperature treatment for 7 hours, and vibrating the shell subjected to high-temperature treatment by using a vibrating screening machine to enable the cuticle on the surface of the shell to fall off; (3) and (3) cleaning the shell obtained in the step (2) for multiple times by using clean water, drying at 60 ℃ until the quality is not changed any more, grinding the shell by using a grinder or a ball mill and the like, and sieving to obtain the shell powder with the particle size of 100-300nm for later use.

Preparation example 2

The preparation method of the silicon dioxide comprises the following steps: (1) uniformly mixing 60kg and 25kg of ammonia water to obtain a mixed solution, adding 30kg of tetraethoxysilane into the mixed solution, continuously stirring, and reacting for 5 hours at room temperature (25 ℃) to obtain a suspension; (2) 3kg of a silane coupling agent (KH-570) was weighed and dissolved in 10kg of anhydrous ethanol, and then the resulting solution was added to the suspension obtained in the above step (1) and reacted at room temperature (25 ℃) for 48 hours, followed by centrifugal filtration to obtain a solid, and washed with deionized water several times, and finally dried at 60 ℃ to obtain the desired silica.

Example 1

S1, preparing a covering layer ink, namely uniformly mixing 40kg of epoxy-acrylic resin, 12kg of aqueous polyurethane emulsion and 9kg of diluent (the mass ratio of distilled water to ethylene glycol is 1: 1) to obtain emulsion, then sequentially adding 9kg of silicon dioxide, 10kg of shell powder, 1kg of polyethylene wax, 2kg of emulsified silicone oil and 1kg of flatting agent (fluorine modified polyacrylate flatting agent), and uniformly stirring and mixing to obtain the ink raw material to be printed on the raincoat body.

S2, preparing the color-changing raincoat, printing a pattern on the surface of the raincoat body so as to form a pattern layer on the surface of the raincoat body, then printing the ink of the step S1 on the raincoat body in a screen printing mode to form a covering layer, wherein the covering layer can cover the pattern layer, and then drying for 2min by hot air at 60 ℃. Wherein the masking layer and the patterning layer have a thickness ratio of about 1: 1.

The preparation process of the other examples was the same as that of example 1 except that the ink formulation content of the masking layer was different, and the ink formulations of the masking layers in examples 1 to 1 are shown in table 1.

Table 1 formulation amounts of inks for the masking layers in examples 1-4.

Example 5: this example differs from example 2 in that polydimethylsiloxane is used instead of silicone emulsion, and the other processes and formulations are the same.

Comparative example 1: this comparative example differs from example 2 in that an acrylic resin is used instead of the epoxy-acrylic resin.

Comparative example 2: the comparative example differs from example 2 in that no aqueous polyurethane emulsion is added.

Comparative example 3: the present comparative example differs from example 2 in that no diluent is added.

Comparative example 4: the comparative example differs from example 2 in that no silica is added.

Comparative example 5: the comparative example differs from example 2 in that no polyethylene wax is added.

Detection method

Anti-shedding performance: the process steps of examples 1-5 and comparative examples 1-4 are that a covering layer is silk-screened on the surface of the raincoat body, then a white grid knife is used for scratching a positive grid with the length of 1mm on the surface of the raincoat body, then an eraser is used for wiping the positive grid and the negative grid back and forth for 100 times, and then the dropping condition of an ink layer is observed. The anti-falling performance of the covering layer is judged according to the ASTM requirement, and the judgment grades are as follows, 5B: the grids do not fall off by any ink detection; 4B: the dropping rate of the grid ink is less than 5 percent; 3B: the dropping rate of the grid printing ink is between 5 and 15 percent; 2B: the dropping rate of the grid ink is between 16 and 35 percent; 1B: the lattice ink dropout rate is between 36 and 65 percent.

Color change time: the process steps of examples 1 to 5 and comparative examples 1 to 4 were screen-printed with a covering layer on the surface of the raincoat body, and then immersed in water to record the time for completion of color change.

Table 2 table of test properties of examples 1 to 5 and comparative examples 1 to 4.

According to the comparison between the embodiment 2 and the comparative examples 1-2, the epoxy-acrylic resin emulsion has the characteristic of good adhesive force as a connecting material, and can have good acting force with a substrate, so that the anti-falling performance of the covering layer can be improved, and the waterborne polyurethane emulsion has the advantages of easy film formation and good wear resistance as a dispersion system of the covering layer, and is matched with the epoxy-acrylic resin emulsion, so that the mechanical performance of the covering layer printed on the surface of the raincoat body is better, and the formed covering layer has a smooth surface, thereby reducing the possibility that the covering layer falls off due to friction.

According to the comparison between example 2 and comparative example 5, it can be seen that the polyethylene wax is added to the system as an anti-wear agent, so that the anti-wear performance of the covering layer can be improved, and the possibility that the covering layer falls off due to friction is reduced.

As can be seen from comparison of example 2 with comparative example 4, due to the porous structure of silica, the sensitivity of the masking layer to moisture can be improved, so that the speed of the color change of the masking layer can be increased when the masking layer encounters water, thereby improving the effect that the masking layer becomes transparent to expose the pattern layer when encountering rainwater.

As can be seen from the comparison between example 2 and comparative example 3, the diluent can adjust the viscosity of the system, so that the mixed system has better viscosity and can be better attached to the substrate.

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.