A coating composition, its preparation method and application, and coating

Abstract

This application relates to the technical field of coating preparation, specifically disclosing a coating composition, its preparation method, application, and coating. The coating composition comprises the following components by weight percentage: water 40-50%; polyurethane resin 30-45%; thickener 1-10%; wetting agent 2-6%; and hand-feeling agent 2-6%. When the coating prepared by the coating composition provided in this application is used as a coating for the outer surface of gloves, it results in lower static and dynamic friction coefficients between the outer surface coatings of the gloves. Therefore, disposable gloves with an outer surface coating formed using the coating composition of this application are easier to peel off from hand molds.

Description

Technical Field

[0001] This application relates to the technical field of coating preparation, and more specifically, to a coating composition, its preparation method and application, and coating. Background Technology

[0002] Disposable protective gloves are closely related to our production and daily life. Among them, nitrile gloves, latex gloves, and PVC gloves are the three main types of disposable gloves. These gloves each have their own characteristics and are used in various fields based on their performance advantages.

[0003] Currently, disposable gloves are typically made by dipping a hand mold in a coating to form the glove, allowing the coating to dry and solidify into a glove, and then demolding the glove. This completes the production of disposable gloves.

[0004] However, the production process of disposable gloves still faces the challenge of difficult demolding. Therefore, there is an urgent need to find a new approach to solve this problem. Summary of the Invention

[0005] This application provides a coating composition, its preparation method, application, and coating. Disposable gloves with an outer surface coating formed using the coating composition of this application are easier to peel off from hand molds.

[0006] In a first aspect, this application provides a coating composition, which adopts the following technical solution:

[0007] A coating composition comprising the following components by weight percentage: 40-50% water; 30-45% polyurethane resin; 1-10% thickener; 2-6% wetting agent; and 2-6% hand feel agent.

[0008] This application provides a coating composition for forming a coating on the outer surface of gloves. The outer surface coatings formed using this coating composition have low coefficients of dynamic and static friction. When a glove coated with this outer surface coating is demolded, the glove folds from the mold until it comes into contact with the outer surface of the glove. Due to the low coefficients of static and dynamic friction between the outer surface coatings, the glove is easier to peel off from the mold. Furthermore, the outer surface coating prepared using this coating composition also has higher adhesion to the glove's main body layer (e.g., a polyurethane resin layer), making it less likely to detach from the glove. Therefore, polyurethane gloves coated with the coating composition of this application as the outer surface coating have better quality and a longer lifespan.

[0009] Optionally, the wetting agent comprises the following components in parts by weight: 2-10 parts of polyether-modified siloxane ether YMT-328; 10-20 parts of polyether-modified siloxane ether YMT-245.

[0010] Optionally, the polyether-modified siloxane ether YMT-328 is 5-8 parts by weight.

[0011] Optionally, the polyether-modified siloxane ether YMT-245 is present in 12-16 parts by weight.

[0012] In one specific implementation, the polyether-modified siloxane ether YMT-328 is present in parts by weight of 2, 5, 6.5, 8, and 10.

[0013] In some specific implementations, the polyether-modified siloxane ether YMT-328 is present in parts by weight of 2-5 parts, 2-6.5 parts, 2-8 parts, 5-6.5 parts, 5-8 parts, 5-10 parts, 6.5-8 parts, 6.5-10 parts, or 8-10 parts.

[0014] In one specific implementation, the polyether-modified siloxane ether YMT-245 is present in parts by weight of 10, 12, 14, 16, or 20.

[0015] In some specific embodiments, the polyether-modified siloxane ether YMT-245 is present in parts by weight of 10-12, 10-14, 10-16, 12-14, 12-16, 12-20, 14-16, 14-20, or 16-20.

[0016] In this application, by adjusting the addition of polyether-modified siloxane ether YMT-328 and polyether-modified siloxane ether YMT-245 to the wetting agent, the static and dynamic coefficients of friction between the outer surface coatings of the gloves are further reduced when the coating composition of this application is used as the outer surface coating of the gloves, making the gloves easier to demold after manufacturing. Simultaneously, the adhesion between the outer surface coating of the gloves and the main body layer of the gloves (e.g., a polyurethane resin layer) can be improved, thereby further improving the quality of the gloves.

[0017] Optionally, the coating composition further includes an organosilicon microsphere dispersion.

[0018] Optionally, the weight ratio of the tactile agent to the organosilicon microsphere dispersion is 1:(2-3).

[0019] In one specific implementation, the weight ratio of the tactile agent to the organosilicon microsphere dispersion is 1:1, 1:2, 1:3, or 1:4.

[0020] In this application, by adding organosilicon microsphere dispersion to the coating composition, the static and dynamic friction coefficients between the outer surface coatings of the gloves can be further reduced when the coating composition of this application is used as the outer surface coating of the gloves, and the adhesion between the outer surface coating of the gloves and the main body layer of the gloves (e.g., polyurethane resin layer) can be improved, thereby further improving the quality of the gloves.

[0021] Optionally, the surface tension of the wetting agent is ≤24mN / m.

[0022] Secondly, this application provides a method for preparing a coating composition, employing the following technical solution:

[0023] A method for preparing a coating composition, the method specifically comprising the following steps:

[0024] While stirring, add the feeler to the water at a stirring speed of 900-1200 r / min;

[0025] After dispersing for 10-20 minutes, continue adding polyurethane resin while stirring at a speed of 200-400 r / min.

[0026] After dispersing for 10-20 minutes, continue adding the thickener while stirring at a speed of 500-700 rpm.

[0027] After dispersing for 20-40 minutes, continue to add wetting agent and other reagents while stirring at a stirring speed of 200-400 r / min, and disperse for 10-20 minutes to obtain the coating composition.

[0028] Thirdly, this application provides the application of a coating composition in the preparation of an outer surface coating for medical surgical gloves, disposable examination gloves, or high-end military and civilian protective gloves.

[0029] Fourthly, this application provides a coating formed using the above-described coating composition.

[0030] In summary, this application has the following beneficial effects:

[0031] This application provides a coating composition for forming a coating on the outer surface of a glove. The outer surface coatings formed using this coating composition have low coefficients of dynamic and static friction. When a glove coated with this outer surface coating is demolded, the glove folds off the mold until the outer surface of the glove comes into contact with the mold. Due to the low coefficients of static and dynamic friction between the outer surface coatings, the glove is easier to peel off from the mold.

[0032] Furthermore, the outer surface coating of the glove prepared using this coating composition exhibits stronger adhesion to the glove's main body layer (e.g., a polyurethane resin layer) and is less prone to detaching from the glove. Therefore, polyurethane gloves coated with the coating composition of this application as the outer surface coating demonstrate better quality and longer lifespan. Detailed Implementation

[0033] Before describing the embodiments of this application in detail, it should be understood that the terminology used herein is for the purpose of describing a particular embodiment only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the term pertains.

[0034] This application provides a coating composition comprising the following components by weight percentage: 40-50% water; 30-45% polyurethane resin; 1-10% thickener; 2-6% wetting agent; and 2-6% hand feel agent. The surface tension of the wetting agent is ≤24 mN / m. The wetting agent comprises the following components by weight: 2-10 parts of polyether-modified siloxane ether YMT-328; and 10-20 parts of polyether-modified siloxane ether YMT-245. Further, the polyether-modified siloxane ether YMT-328 is 5-8 parts by weight, and the polyether-modified siloxane ether YMT-245 is 12-16 parts by weight. Additionally, the coating composition further comprises an organosilicon microsphere dispersion. The weight ratio of the hand feel agent to the organosilicon microsphere dispersion is 1:(2-3).

[0035] This application provides a method for preparing a coating composition, specifically including the following steps:

[0036] While stirring, add the feeler to the water at a stirring speed of 900-1200 r / min;

[0037] After dispersing for 10-20 minutes, continue adding polyurethane resin while stirring at a speed of 200-400 r / min.

[0038] After dispersing for 10-20 minutes, continue adding the thickener while stirring at a speed of 500-700 rpm.

[0039] After dispersing for 20-40 minutes, continue to add wetting agent and other reagents while stirring at a stirring speed of 200-400 r / min, and disperse for 10-20 minutes to obtain the coating composition.

[0040] Furthermore, this application also provides the application of the above-mentioned coating composition in the preparation of outer surface coatings for medical surgical gloves, disposable examination gloves, or high-end military and civilian protective gloves, as well as the coating formed using the above-mentioned coating composition.

[0041] The tactile agent was purchased from Guangzhou Sloc Chemical Co., Ltd., and its model number is H4102.

[0042] The polyurethane resin was purchased from Anhui Yuanchen New Material Technology Co., Ltd., model YC-306.

[0043] The polyether-modified polysiloxanes were purchased from Umet (Beijing) Environmental Materials Technology Co., Ltd., with models YMT-328 and YMT-245.

[0044] Organosilicon microsphere dispersion, purchased from Yongqi Materials Technology (Shanghai) Co., Ltd., item number: FE212U.

[0045] The thickener was purchased from Beijing Runbo Hengtong Technology Co., Ltd., model number RT-360.

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0047] The present application will be further described in detail below with reference to embodiments, comparative examples and performance test results.

[0048] Example

[0049] Example 1

[0050] This embodiment provides a coating composition. The specific components of the coating composition are shown in Table 1.

[0051] The preparation method of the above coating composition specifically includes the following steps:

[0052] (1) Add water to the mixing tank, start the disperser, set the speed to 1000 r / min, add the hand-feeling agent to the water while stirring, and disperse for 10 min.

[0053] (2) Continue to add polyurethane resin while stirring at a speed of 300 r / min and disperse for 10 min.

[0054] (3) Continue to add thickener while stirring at a speed of 600 r / min and disperse for 30 min.

[0055] (4) While stirring, continue to add wetting agent and other reagents at a stirring speed of 300 r / min and disperse for 10 min to obtain the coating composition.

[0056] Example 2-19

[0057] Examples 2-19 each provide a coating composition. The specific components of the above coating compositions are shown in Table 1. The preparation method of the above coating compositions is the same as that of Example 1.

[0058] The differences between the above embodiments are as follows:

[0059] The difference between Examples 1 and 2 is that the wetting agent is a single type and of a different kind.

[0060] The difference between Examples 3-13 and Examples 1-2 is that the wetting agent is a mixture.

[0061] The difference between Examples 3-7 is that the amount of polyether-modified siloxane ether YMT-328 added to the wetting agent is different.

[0062] The difference between Examples 5 and 8-11 is that the amount of polyether-modified siloxane ether YMT-245 added to the wetting agent is different.

[0063] The difference between Examples 5 and 12-13 is that the weight percentage of wetting agent in the coating composition is different.

[0064] The difference between Examples 5 and 14-17 is that an organosilicon microsphere dispersion was added, and the amount of organosilicon microsphere dispersion added in Examples 16-19 is different.

[0065] The difference between Examples 5 and 18-19 is that the weight percentage of the hand-feeling agent in the coating composition is different.

[0066] Comparative Example

[0067] Comparative Examples 1-2

[0068] Comparative Examples 1 and 2 each provide a coating composition. The specific components of the above coating compositions are shown in Table 1. The preparation method of the above coating compositions is the same as that of Example 1.

[0069] The differences between the above comparisons are as follows:

[0070] The difference between Comparative Example 1 and Example 5 is that no wetting agent was added.

[0071] The difference between Comparative Example 2 and Example 5 is that no feel agent was added.

[0072] Table 1. Addition details of each component in the examples and comparative examples.

[0073]

[0074] Performance testing

[0075] I. The following test indicators of the coating compositions of the above embodiments and comparative examples were tested respectively.

[0076] (1) Original liquid viscosity: The original liquid viscosity of the coating composition was tested at 25℃ using an ND-1 type viscometer (3# rotor).

[0077] (2) pH value: The coating composition was diluted at a ratio of 1:20, and the pH of the diluted solution was measured.

[0078] (3) Solid content: Weigh 1g of the coating composition and bake it in an oven at 125℃ for 1 hour. Weigh the dry matter after baking. Solid content (%) = dry matter weight / original weight (i.e., 1g) × 100%.

[0079] The testing standards for the above indicators and the test results of the above examples and comparative examples are shown in Table 2.

[0080] Table 2 shows the test results for the examples and comparative examples.

[0081] detection indicators Inspection standards The detection results of the above embodiments and comparative examples Original liquid viscosity 300-2500 1640±50 pH value 9.3±1 9.68±0.4 Solid content ≥14.5％ ≥15.2％

[0082] As shown in Table 2, the viscosity, pH value and solid content of the coating composition provided in this application all meet the requirements of the testing standards.

[0083] 2. The coefficient of friction between the coatings prepared by the coating compositions of the above embodiments and comparative examples was tested.

[0084] 1. The specific manufacturing process of polyurethane gloves is as follows:

[0085] (1) Clean the hand mold and dry it in an oven at 120°C;

[0086] (2) Dip the hand mold in polyurethane resin (purchased from Hefei Ketian Waterborne Technology Co., Ltd., model KT713A) to form a polyurethane resin layer, and dry it in an oven at 120°C. Repeat this process twice.

[0087] (3) Continue to dip the hand mold with the diluted solution of the coating composition of the above examples and comparative examples (dilution ratio of 1:20) to form the outer surface coating of the polyurethane glove, and dry it in an oven at 120°C.

[0088] (4) Demolding, i.e., obtaining polyurethane gloves.

[0089] 2. The method for testing the coefficient of friction is as follows:

[0090] The coefficient of friction between the outer surface coating and the outer surface coating of the polyurethane glove was tested using a Labthink FPT-F1 friction coefficient meter. The coefficient of friction is calculated as the ratio of the frictional force to the pressure perpendicular to the contact surface.

[0091] Three samples each of 8cm×20cm and 100mm×63mm were cut from the prepared polyurethane gloves, forming three sets of samples. During the cutting process, the test surface of the sample must not be touched by hand, i.e., the outer surface of the glove must not be touched. One 8cm×20cm sample, with its outer surface facing upwards, was fixed to a horizontal test platform; the 100mm×63mm sample, with its outer surface exposed, was fixed to the slider (i.e., the inner surface is in direct contact with the slider). During the fixing test, the test surface of the sample must not be touched by hand. The slider was placed on the sample on the horizontal test platform without impact, ensuring that the testing system of the equipment was not subjected to force, and that the test direction was horizontal to the slider's movement direction. The test speed was set to 100mm / min and the test depth to 150mm. The test was conducted, and the test results were recorded. The corresponding static and dynamic friction coefficients were calculated.

[0092] The test results are shown in Table 3.

[0093] Table 3. Friction coefficient test results

[0094]

[0095] Table 3 shows that, comparing the test results of Examples 1-2, when the wetting agents are polyether-modified siloxane ether YMT-328 and polyether-modified siloxane ether YMT-245 respectively, the static friction coefficient between the coatings formed by this coating composition is approximately 0.23, and the dynamic friction coefficient is approximately 0.2. However, the test results of Example 3 show that, compared to Examples 1-2, when the wetting agent is a mixture, it can effectively reduce the static and dynamic friction coefficients between the coatings formed by this coating composition. In particular, when the wetting agent is a mixture of polyether-modified siloxane ether YMT-328 and polyether-modified siloxane ether YMT-245, the static friction coefficient between the coatings formed by this coating composition decreases to 0.193, and the dynamic friction coefficient decreases to 0.171.

[0096] Comparing the test results of Examples 3-7, it is evident that when the wetting agent is a mixture of polyether-modified siloxane ether YMT-328 and polyether-modified siloxane ether YMT-245, controlling the addition amount of polyether-modified siloxane ether YMT-328 to 2-10 parts reduces both the static and dynamic friction coefficients between the coatings formed using this coating composition. Furthermore, controlling the addition amount of polyether-modified siloxane ether YMT-328 to 5-8 parts further reduces both the static and dynamic friction coefficients between the coatings formed using this coating composition. Therefore, to further reduce the static and dynamic friction coefficients between the coatings formed using this coating composition, the addition amount of polyether-modified siloxane ether YMT-328 is selected to be controlled at 5-8 parts.

[0097] Comparing the test results of Examples 5 and 8-11, it is evident that when the wetting agent is a mixture of polyether-modified siloxane ether YMT-328 and polyether-modified siloxane ether YMT-245, controlling the addition amount of polyether-modified siloxane ether YMT-245 to 10-20 parts reduces both the static and dynamic friction coefficients between the coatings formed using this coating composition. Furthermore, controlling the addition amount of polyether-modified siloxane ether YMT-245 to 12-16 parts further reduces the static and dynamic friction coefficients between the coatings formed using this coating composition. Therefore, to further reduce the static and dynamic friction coefficients between the coatings formed using this coating composition, the addition amount of polyether-modified siloxane ether YMT-245 is selected to be controlled at 12-16 parts.

[0098] Comparing the test results of Examples 5 and 12-13, it can be seen that controlling the amount of wetting agent added to 2-6 parts reduces both the static and dynamic friction coefficients between the coatings formed using this coating composition. To further reduce the static and dynamic friction coefficients between the coatings formed using this coating composition, the amount of wetting agent added to the coating composition is selected to be controlled at 2-6 parts.

[0099] Comparative analysis of the test results in Examples 5 and 14-17 shows that adding organosilicon microsphere dispersion to the coating composition further reduces the static and dynamic friction coefficients between the coatings formed using this composition. Specifically, when the amount of organosilicon microsphere dispersion added is controlled at 4-16 parts, the static friction coefficient between the coatings formed using this composition is approximately 0.13, and the dynamic friction coefficient is approximately 0.11; while when the amount of organosilicon microsphere dispersion added is controlled at 8-12 parts, the static friction coefficient between the coatings formed using this composition is approximately 0.1, and the dynamic friction coefficient is approximately 0.08. Therefore, to further reduce the static and dynamic friction coefficients between the coatings formed using this composition, the amount of organosilicon microsphere dispersion added is selected to be controlled at 8-12 parts.

[0100] Comparing the test results of Examples 5 and 18-19, it can be seen that controlling the amount of the hand-feeling agent added to 2-6 parts reduces both the static and dynamic friction coefficients between the coatings formed using this coating composition. To further reduce the static and dynamic friction coefficients between the coatings formed using this coating composition, the amount of the hand-feeling agent added to the coating composition is controlled to 2-6 parts.

[0101] Comparing the test results of Example 5 and Comparative Examples 1-2, it can be seen that in Comparative Example 1, when the coating composition does not contain a wetting agent, the static friction coefficient between the coatings formed by the coating composition is 0.305 and the dynamic friction coefficient is 0.285; in Comparative Example 2, when the coating composition does not contain a hand-feeling agent, the static friction coefficient between the coatings formed by the coating composition is 0.291 and the dynamic friction coefficient is 0.278; while in Example 5, when the coating composition contains both a wetting agent and a hand-feeling agent, the static friction coefficient between the coatings formed by the coating composition is 0.156 and the dynamic friction coefficient is 0.136. Therefore, it is demonstrated that the coating composition of this application, under the combined action of the hand-feeling agent and the wetting agent, can further reduce the static and dynamic friction coefficients between the coatings formed by the coating composition. Therefore, when preparing polyurethane gloves, since both the static and dynamic friction coefficients between the contacting outer surfaces of the gloves are reduced, the polyurethane gloves coated with the coating composition of this application are easier to demold.

[0102] 3. The adhesion between the coatings prepared from the coating compositions of the above embodiments and comparative examples and the polyurethane resin layer was tested.

[0103] 1. The specific manufacturing process of polyurethane gloves is as follows:

[0104] (1) Clean the hand mold and dry it in an oven at 120°C;

[0105] (2) Dip the hand mold in polyurethane resin (purchased from Hefei Ketian Waterborne Technology Co., Ltd., model KT713A) to form a polyurethane resin layer, and dry it in an oven at 120℃. Repeat this process 2-4 times.

[0106] (3) Continue to dip the hand mold with the diluted solution of the coating composition of the above examples and comparative examples (dilution ratio of 1:20) to form the outer surface coating of the polyurethane glove, and dry it in an oven at 120°C.

[0107] (4) Demolding, i.e., obtaining polyurethane gloves.

[0108] 2. The adhesion testing method is as follows:

[0109] Twenty polyurethane gloves prepared using the above method were selected and worn by 10 people for 4 consecutive hours. After the gloves were removed, the degree of coating peeling was observed on each glove, and the adhesion level classification is shown in Table 4.

[0110] Table 4 Adhesion Grade Classification

[0111] Classification Level Requirements 0 The coating is intact and there is no peeling. 1 The fingertips have a very slight sheen, not exceeding 5%. 2 The fingers exhibit a noticeable shine, covering an area significantly larger than 5%, but not significantly larger than 15%. 3 The fingers and palms are shiny, covering an area significantly larger than 15%, but not significantly larger than 35%. 4 The fingers and palms are shiny, covering an area significantly larger than 35%, but not significantly larger than 65%. 5 The degree of detachment exceeds level 4.

[0112] The test results are shown in Table 5.

[0113] Table 5 Adhesion test results

[0114]

[0115] As shown in Table 5, comparing the test results of Examples 1-2, it is evident that when the wetting agents are polyether-modified siloxane ether YMT-328, polyether-modified siloxane ether YMT-245, organosilicon microsphere dispersion, or polyether-modified polysiloxane, the adhesion between the coating and the polyurethane resin layer formed by this coating composition can reach level 3. This indicates that there is still considerable room for improvement in the adhesion between the coating and the polyurethane resin layer. Furthermore, the test results of Example 3 show that, compared to Examples 1-2, when the wetting agent is a mixture, it has an improving effect on the adhesion between the coating and the polyurethane resin layer. In particular, when the wetting agent is a mixture of polyether-modified siloxane ether YMT-328 and polyether-modified siloxane ether YMT-245, the adhesion between the coating and the polyurethane resin layer can be improved to level 2.

[0116] Comparing the test results of Examples 3-7, it can be seen that when the wetting agent is a mixture of polyether-modified siloxane ether YMT-328 and polyether-modified siloxane ether YMT-245, controlling the addition amount of polyether-modified siloxane ether YMT-328 at 2-10 parts can improve the adhesion between the coating and the polyurethane resin layer to level 2. Furthermore, controlling the addition amount of polyether-modified siloxane ether YMT-328 at 5-8 parts can improve the adhesion between the coating and the polyurethane resin layer to level 1. Therefore, to achieve higher adhesion between the coating and the polyurethane resin layer, the addition amount of polyether-modified siloxane ether YMT-328 is controlled at 5-8 parts.

[0117] Comparing the test results of Examples 5 and 8-11, it can be seen that when the wetting agent is a mixture of polyether-modified siloxane ether YMT-328 and polyether-modified siloxane ether YMT-245, controlling the addition amount of polyether-modified siloxane ether YMT-245 at 10-20 parts can improve the adhesion between the coating and the polyurethane resin layer to level 2. Furthermore, controlling the addition amount of polyether-modified siloxane ether YMT-245 at 12-16 parts can improve the adhesion between the coating and the polyurethane resin layer to level 1. Therefore, to achieve higher adhesion between the coating and the polyurethane resin layer, the addition amount of polyether-modified siloxane ether YMT-245 is controlled at 12-16 parts.

[0118] Comparing the test results of Examples 5 and 12-13, it can be seen that controlling the amount of wetting agent added to 2-6 parts can improve the adhesion between the coating and the polyurethane resin layer to level 2. To achieve even higher adhesion between the coating and the polyurethane resin layer, the amount of wetting agent added to the coating composition is controlled at 2-6 parts.

[0119] Comparing the test results of Examples 5 and 14-17, it is evident that adding organosilicon microsphere dispersion to the coating composition further improves the adhesion grade between the coating and the polyurethane resin layer. Specifically, when the amount of organosilicon microsphere dispersion added is controlled at 4-16 parts, the adhesion grade between the coating and the polyurethane resin layer is 1. However, when the amount of organosilicon microsphere dispersion added is controlled at 8-12 parts, the adhesion grade between the coating and the polyurethane resin layer can be improved to 0. Therefore, to achieve higher adhesion between the coating and the polyurethane resin layer, the amount of organosilicon microsphere dispersion added is selected to be controlled at 8-12 parts.

[0120] Comparing the test results of Examples 5 and 18-19, it can be seen that controlling the amount of the hand-feeling agent added to 2-6 parts can improve the adhesion between the coating and the polyurethane resin layer to level 2. To achieve even higher adhesion between the coating and the polyurethane resin layer, the amount of the hand-feeling agent added to the coating composition is controlled at 2-6 parts.

[0121] Comparing the test results of Example 5 and Comparative Examples 1-2, it can be seen that in Comparative Example 1, when the coating composition does not contain a wetting agent, the adhesion between the coating and the polyurethane resin layer decreases to level 5; in Comparative Example 2, when the coating composition does not contain a hand-feeling agent, the adhesion between the coating and the polyurethane resin layer decreases to level 4; while in Example 5, when the coating composition contains both a wetting agent and a hand-feeling agent, the adhesion between the coating and the polyurethane resin layer can reach level 1. Therefore, it is demonstrated that the coating composition of this application, under the combined action of the hand-feeling agent and the wetting agent, further improves the adhesion between the outer surface coating of the glove and the polyurethane resin layer, thereby effectively improving the quality and service life of the polyurethane gloves.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A coating composition characterized in that, The coating composition comprises the following components by weight percentage: water 40-50%; polyurethane resin 30-45%; thickening agent 1-10%; wetting agent 2-6%; hand feel agent 2-6%; the coating composition further comprises a silicone microsphere dispersion; the weight ratio of the hand feel agent and the silicone microsphere dispersion is 1:(2-3); the wetting agent comprises the following components by weight: polyether modified siloxane YMT-328 2-10 parts; polyether modified siloxane YMT-245 10-20 parts; The hand feel agent is purchased from Guangzhou Slocos Chemical Co., Ltd., model H4102; the silicone microsphere dispersion is purchased from YQ Material Technology (Shanghai) Co., Ltd., item number FE212U.

2. The coating composition according to claim 1, characterized in that, The weight of the polyether modified siloxane YMT-328 is 5-8 parts.

3. The coating composition of claim 1, wherein, The weight of the polyether modified siloxane YMT-245 is 12-16 parts.

4. A process for the preparation of a coating composition according to any one of claims 1 to 3, characterized in that The preparation method specifically comprises the following steps: The hand feel agent is added to the water while stirring, and the stirring speed is 900-1200 r / min; After 10-20 min of dispersion, the polyurethane resin is continuously added while stirring, and the stirring speed is 200-400 r / min; After 10-20 min of dispersion, the thickening agent is continuously added while stirring, and the stirring speed is 500-700 r / min; After 20-40 min of dispersion, the wetting agent and other reagents are continuously added while stirring, and the stirring speed is 200-400 r / min, After 10-20 min of dispersion, the coating composition is obtained.

5. Use of the coating composition of any one of claims 1-3 in the preparation of an outer surface coating of a medical surgical glove or a disposable examination glove.

6. A coating formed using the coating composition of any one of claims 1-3.

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