Preparation and application method of fragrant and cool coating adhesive for textiles

Abstract

The invention relates to the technical field of after-finishing of textiles, in particular to preparation and application methods of fragrant cool coating glue for textiles. The fragrant and cool coating adhesive provided by the invention is prepared from the perfluorosilane coupling agent / polyether polyol modified phase change / essence microcapsule, the adhesive, the softening agent, the penetrating agent and the thickening agent, and is finished on a textile through a silk-screen printing method, so that the textile is endowed with dual effects of cool feeling and fragrance, and the washing resistance is excellent. Meanwhile, due to the slow release effect of the essence microcapsules, the textiles can keep fragrance for a long time, irritant peculiar smells brought by auxiliaries such as adhesives and thickening agents are covered, and the essence microcapsules can be widely applied to the fields of textile printing, coatings and the like.

Description

Technical Field

[0001] The invention relates to the technical field of textile finishing, and in particular to a preparation and application method of a fragrant and cool coating adhesive for textiles. Background Art

[0002] Cool coating adhesive is a textile coating finishing agent containing phase change material. The phase change material can be adhered to the surface of the fabric through the bonding effect of the adhesive. The phase change material can absorb or release a large amount of latent heat as the temperature changes, so that the textile can achieve the effect of intelligent temperature regulation. At present, cool coating adhesive has been used in textile fields such as medical health, military equipment, sports and household goods, and can achieve functions such as cooling and relieving heat, cold protection and warmth, dynamic monitoring, and fashion display. However, the application of cool coating adhesive also has many problems. For example, due to the influence of additives such as adhesives, thickeners, and softeners, the finished textiles will have an unpleasant irritating odor. At the same time, a series of problems such as unsatisfactory cooling effect and poor water resistance also need to be further solved. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies of the above-mentioned technology, one of the purposes of the present invention is to provide a method for preparing a fragrant and cool coating adhesive for textiles, the steps are as follows: (A) 1-10 parts of perfluorosilane coupling agent and 1-5 parts of polyether polyol are uniformly dissolved in 100 mL of deionized water to form a perfluorosilane coupling agent / polyether polyol solution, and the pH of the solution is adjusted to 7.0, and then 5-20 parts of phase change microcapsule powder and 0.5-5 parts of flavor microcapsule powder are added. The temperature is raised to 60-90° C., and the dispersion machine is stirred at 200-500 rpm for 1-3 hours. After cooling to room temperature, a perfluorosilane / polyether polyol modified phase change / flavor microcapsule emulsion is obtained.

[0004] (B) Add 5 to 8 parts of adhesive, 3 to 10 parts of softener, 1 to 2 parts of penetrant and 2 to 5 parts of thickener to the perfluorosilane / polyether polyol modified phase change / flavor microcapsule emulsion in order by weight, disperse and stir evenly, and obtain a fragrant and cool coating adhesive for textiles.

[0005] In some embodiments, the perfluorosilane coupling agent in step (A) is one or more of perfluorodecyltrimethoxysilane, perfluorooctyltrimethoxysilane, perfluorooctyltriethoxysilane, perfluorooctyltrichlorosilane and perfluorodecyltrichlorosilane.

[0006] In some embodiments, the polyether polyol in step (A) is one or more of polyethylene glycol and polypropylene glycol, with a molecular weight of 200 to 1000.

[0007] In some embodiments, the core material of the phase change microcapsule in step (A) is n-octadecane, the shell material is melamine resin or polymethyl methacrylate, and the core-shell ratio is (4-5):1.

[0008] In some embodiments, the core material of the flavor microcapsule in step (A) is one or more of wormwood, ginger, mint, lemon, sandalwood and lavender essential oils, and the shell material is a composite of one or more of melamine resin, polyurethane, polyurea and epoxy resin, and the core-shell ratio is (3-6):1.

[0009] In some embodiments, the adhesive in step (B) is one or more of acrylic, polyurethane, polyvinyl alcohol, vinyl acetate and epoxy resin water-based adhesives.

[0010] In some embodiments, the softener in step (B) is one or more of amino, epoxy, polyether, polyurethane, and polyether block amino-modified silicone oil.

[0011] In some embodiments, the penetrant in step (B) is one or more of aliphatic polyoxyethylene ether, isooctyl alcohol polyoxyethylene ether phosphate, and polyethylene glycol octylphenyl ether.

[0012] In some embodiments, the thickener in step (B) is one or more of cellulose, polyacrylic acid, and polyurethane.

[0013] The second object of the present invention is to provide an application method of the above-mentioned refreshing and cool coating adhesive, the steps are as follows: (1) Lay the textile flat, take an appropriate amount of the refreshing and cool coating glue and place it on the screen printing mesh, and evenly scrape the coating glue from top to bottom. If multiple printings are required, repeat the above operation; (2) After scraping off the coating glue, the textile is removed and placed in a forced air oven for baking. After cooling, a textile with a refreshing fragrance and cool feeling is obtained.

[0014] In some embodiments, the textile in step (1) is one of polyester, nylon and spandex.

[0015] In some embodiments, the screen printing mesh in step (1) has a mesh count of 80 to 100.

[0016] In some embodiments, the mass ratio of the textile to the coating adhesive in step (1) is (1-5):1.

[0017] In some embodiments, the baking temperature in step (2) is 140-180° C., and the baking time is 1-5 min.

[0018] The beneficial effects of the present invention are: 1. The present invention uses a perfluorosilane coupling agent and a polyether polyol composite modifier to modify the shell material of the phase change / flavor microcapsule. The modified microcapsule contains a silanol group, which can react with the hydroxyl group on the textile to significantly improve the adhesion between the microcapsule and the textile. The coolness coefficient Q max , enthalpy value, fragrance level and water resistance can be significantly improved.

[0019] 2. Phase change microcapsules and fragrance microcapsules are arranged on textiles, giving the textiles a dual effect of coolness and fragrance. The sustained release effect of fragrance microcapsules can make the textiles retain their fragrance for a long time, covering up the irritating odor caused by additives such as adhesives, thickeners and softeners. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the DSC enthalpy value test curve of the fresh and cool textile obtained in Example 6-2. DETAILED DESCRIPTION

[0021] The preparation and application methods of the fragrant and cool coating adhesive for textiles are further described below in conjunction with specific examples, but the embodiments of the present invention are not limited thereto.

[0022] The coolness coefficient Q in the following examples and comparative examples is max , enthalpy value, fragrance retention and water resistance are evaluated as follows: (1) Cooling coefficient Q max Determined using the method specified in GB / T35263-2017; (2) Enthalpy value is determined by the method specified in GB / T19466.3; (3) Evaluation method of fragrance retention: olfactory method (0 represents no fragrance, 2 represents a faint fragrance, 4 represents a continuous slight fragrance, 6 represents a moderate fragrance, 8 represents a slightly strong fragrance, and 10 represents a very strong fragrance); (4) Washability evaluation method: The evaluation index is the percentage attenuation of the enthalpy value of the textile after 10 washes ((enthalpy value before washing - enthalpy value after 10 washes) / enthalpy value before washing × 100%), and the washing procedure adopts the method specified in GB / T8629-2017.

[0023] Example 1 A method for preparing a fragrant and cool coating adhesive for textiles, the preparation method comprises the following steps: (A) 5 parts of perfluorodeoxytrimethoxysilane and 3 parts of polyethylene glycol 1000 were uniformly dissolved in 100 mL of deionized water, and the pH of the solution was adjusted to 7.0, and then 20 parts of phase change microcapsule powder and 2 parts of flavor microcapsule powder were added. The temperature was raised to 80° C., and the dispersion machine was stirred at 500 rpm for 1 hour. After cooling to room temperature, a modified phase change / flavor microcapsule emulsion was obtained; (B) Then, 5 parts of water-based polyurethane adhesive, 5 parts of amino silicone oil emulsion, 1 part of aliphatic polyoxyethylene ether and 4 parts of hydroxypropyl methylcellulose were added in sequence, and stirred at 1000 rpm in a disperser for 0.5 h to obtain a fragrant and cool coating adhesive for textiles.

[0024] (C) Spread the spandex textile flat, take an appropriate amount of the above-mentioned refreshing and cool coating glue and place it on a 100-mesh screen printing mesh, and evenly scrape the coating glue from top to bottom at one time, controlling the mass ratio of textile to coating glue to be 3:1. After scraping the coating glue, remove the textile, put it in a blast oven and bake it at 140°C for 2 minutes, and after cooling, a refreshing and cool textile is obtained.

[0025] Among them, the core material of the phase change microcapsule in step (A) is n-octadecane, the shell material is melamine resin, and the core-shell ratio is 4.5:1; the core material of the fragrance microcapsule is wormwood essential oil, the shell material is melamine resin, and the core-shell ratio is 5:1. Example 2 Based on Example 1, the type of perfluorosilane coupling agent was changed, and the rest was the same as Example 1.

[0026] Example 2-1: The perfluorosilane coupling agent is perfluorooctyltrimethoxysilane; Example 2-2: The perfluorosilane coupling agent is perfluorooctyltriethoxysilane; Example 2-3: The perfluorosilane coupling agent is perfluorooctyltrichlorosilane; Comparative Example 1: No perfluorosilane coupling agent was added.

[0027] Table 1

[0028] From the comparison results of the above embodiments and comparative examples, it can be seen in Table 1 that the phase change and fragrance microcapsules can significantly improve the adhesion between the microcapsules and the textiles after being modified by the perfluorosilane coupling agent, and the coolness coefficient Q max , enthalpy value, fragrance level and water resistance are significantly improved, among which the modification effect of perfluorooctyltriethoxysilane is better than other perfluorosilane coupling agents.

[0029] Example 3 Based on Example 1, the type of polyether polyol was changed, and the rest was the same as Example 1.

[0030] Example 3-1: The polyether polyol is polyethylene glycol 500; Example 3-2: The polyether polyol is polypropylene glycol 500; Example 3-3: The polyether polyol is polypropylene glycol 1000; Comparative Example 2: No polyether polyol was added. Comparative Example 3: No perfluorosilane coupling agent and polyether polyol were added. Table 2

[0031] From the comparison results of the above embodiments and comparative examples in Table 2, it can be seen that after the phase change and flavor microcapsules are modified with polyether polyols, the adhesion between the microcapsules and the textiles can be improved, and the coolness coefficient Qmax, enthalpy value, fragrance degree and water resistance are all improved. The modification effects of different types of polyether polyols are not very different. The composite modification effect of perfluorosilane coupling agent and polyether polyol on microcapsules is better than the modification effect of single perfluorosilane coupling agent or polyether polyol, among which the perfluorosilane coupling agent plays a leading modification role.

[0032] Example 4 Based on Example 1, the amount of the perfluorosilane coupling agent was changed, and the rest was the same as Example 1.

[0033] Example 4-1: The dosage of perfluorosilane coupling agent is 1 part; Example 4-2: 3 parts of perfluorosilane coupling agent; Example 4-3: The dosage of perfluorosilane coupling agent is 7 parts.

[0034] Table 3

[0035] From the comparison results of the above embodiments, it can be seen in Table 3 that the greater the amount of perfluorosilane coupling agent used, the greater the adhesion between the microcapsules and the textiles, and the coolness coefficient Q max , enthalpy value, aroma level and water resistance are all improved, but when the perfluorosilane coupling agent reaches a certain dosage, the modification effect is not significantly improved.

[0036] Example 5 Based on Example 1, the dispersion temperature in step A was changed, and the rest was the same as Example 1.

[0037] Example 5-1: The dispersion temperature is 60°C; Example 5-2: The dispersion temperature is 70°C; Example 5-3: The dispersion temperature is 90°C.

[0038] Table 4

[0039] From the comparison results of the above embodiments in Table 4, it can be seen that when the dispersion temperature is high, the molecules move violently, which can promote the modification between the perfluorosilane coupling agent and the polyether polyol and the microcapsule. However, when the temperature is very high, part of the shell material will break, causing the core material to overflow. Therefore, the dispersion temperature of 80°C is the optimal dispersion temperature.

[0040] Example 6 Based on Example 1, the baking temperature in step (C) was changed, and the rest was the same as Example 1.

[0041] Example 6-1: baking temperature 120°C; Example 6-2: baking temperature 160°C; Example 6-3: Baking temperature 180°C.

[0042] Table 5

[0043] From the comparative results of the above embodiments, it can be seen in Table 5 that when the baking temperature is moderate, the adhesive can fully react and the microcapsules can adhere better to the textiles, but when the temperature is very high, part of the shell material will break, causing the core material to overflow, so the baking temperature of 160°C is the optimal baking temperature.

[0044] Example 7 Based on Example 1, the amount of adhesive was changed, and the rest was the same as Example 1.

[0045] Example 7-1: The amount of adhesive is 6 parts; Example 7-2: The amount of adhesive used is 7 parts; Example 7-3: The amount of adhesive is 8 parts; Comparative Example 4: No adhesive was added.

[0046] Table 6

[0047] From the comparison results of the above embodiments and comparative examples, it can be seen in Table 6 that the addition of adhesive can greatly improve the adhesion between the microcapsules and the textiles. As the amount of adhesive increases, the coolness coefficient Q max , enthalpy value, aroma level and water resistance performance are all improved, but the improvement effect is not obvious after the adhesive exceeds a certain value.

[0048] Example 8 Based on Example 1, the types of shell materials of phase change microcapsules and flavor microcapsules were changed, and the rest were the same as Example 1.

[0049] Example 8-1: The shell materials of phase change microcapsules and fragrance microcapsules are polyurethane resin; Example 8-2: The shell materials of phase change microcapsules and fragrance microcapsules are polyurea resin; Example 8-3: The shell material of phase change microcapsules and fragrance microcapsules is epoxy resin.

[0050] Table 7

[0051] From the comparative results of the above embodiments, it can be seen in Table 7 that when melamine resin is used as the shell material of the microcapsule, the coolness coefficient Q max , enthalpy value, fragrance level and water resistance are the best, followed by polyurethane and polyurea, and epoxy resin has the worst effect.

[0052] The above is only a specific implementation of the present invention. It should be pointed out that for R&D technicians in this field, without departing from the principle of the present invention, they can make several improvements and modifications, which should also be regarded as the protection scope of the present invention.

Claims

1. A method for preparing a fragrant and cool coating adhesive for textiles, characterized in that: The preparation method steps are as follows: (A) a perfluorosilane coupling agent and a polyether polyol are uniformly dissolved in deionized water to form a perfluorosilane coupling agent / polyether polyol solution, and the phase change microcapsule powder and the flavor microcapsule powder are added after the pH of the solution is adjusted to 7.0, the temperature is raised, the dispersion is stirred, and the perfluorosilane / polyether polyol modified phase change / flavor microcapsule emulsion is obtained after cooling to room temperature; (B) Adding an adhesive, a softener, a penetrant and a thickener into the perfluorosilane / polyether polyol modified phase change / flavor microcapsule emulsion, dispersing and stirring the mixture evenly, a fragrant and cool coating adhesive for textiles can be obtained.

2. The preparation method according to claim 1, characterized in that: The perfluorosilane coupling agent in step (A) is one or more of perfluorodecyl trimethoxysilane, perfluorooctyl trimethoxysilane, perfluorooctyl triethoxysilane, perfluorooctyl trichlorosilane and perfluorodecyl trichlorosilane; the polyether polyol is one or a combination of polyethylene glycol and polypropylene glycol, with a molecular weight of 200 to 1000.

3. The preparation method according to claim 1, characterized in that: In step (A), the core material of the phase change microcapsule is n-octadecane, the shell material is melamine resin or polymethyl methacrylate, and the core-shell ratio is (4-5):1; the core material of the flavor microcapsule is one or more of wormwood, ginger, mint, lemon, sandalwood, and lavender essential oils, and the shell material is a composite of one or more of melamine resin, polyurethane, polyurea and epoxy resin, and the core-shell ratio is (3-6):

1.

4. The preparation method according to claim 1, characterized in that: In step (A), the weight proportions of polyether polyol, perfluorosilane coupling agent, phase change microcapsule powder and fragrance microcapsule powder are respectively: 1 to 5 parts of polyether polyol, 1 to 10 parts of perfluorosilane coupling agent, 5 to 20 parts of phase change microcapsule powder and 0.5 to 5 parts of fragrance microcapsule powder.

5. The preparation method according to claim 1, characterized in that: In step (A), the heating temperature is 60-90° C., the stirring rate is 200-500 rpm, and the stirring time is 1-3 h.

6. The preparation method according to claim 1, characterized in that: In step (B), the adhesive is one or more of acrylic, polyurethane, polyvinyl alcohol, vinyl acetate and epoxy resin water-based adhesives; the softener is one or more of amino, epoxy, polyether, polyurethane, polyether block amino modified silicone oil emulsion; the penetrant is one or more of aliphatic polyoxyethylene ether, isooctyl alcohol polyoxyethylene ether phosphate, polyethylene glycol octylphenyl ether; the thickener is one or more of cellulose, polyacrylic acid, and water-based polyurethane.

7. The preparation method according to claim 1, characterized in that: The weight ratio of perfluorosilane / polyether polyol modified phase change / flavor microcapsule emulsion, adhesive, softener, penetrant and thickener is (7.5-40): (5-8): (3-10): (1-2): (2-5).

8. A method for applying the fragrant and cool coating adhesive obtained by the preparation method according to any one of claims 1 to 7, characterized in that: The application method steps are as follows: (1) Lay the textile flat, take an appropriate amount of the refreshing and cool coating glue and place it on the screen printing mesh, and evenly scrape the coating glue from top to bottom. If multiple printings are required, repeat the above operation; (2) After scraping off the coating glue, remove the textile and place it in a forced air oven for baking. After cooling, a textile with a refreshing fragrance and cool feeling is obtained.

9. The application method according to claim 8, characterized in that: The textile in step (1) is one of polyester, nylon and spandex; the mesh number of the screen printing mesh is 80-100 meshes; and the mass ratio of the textile to the coating adhesive is (1-5):

1.

10. The application method according to claim 8, characterized in that: The baking temperature in step (2) is 140-180° C., and the baking time is 1-5 minutes.

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