A coating composition for forming a glove inner surface coating, and a method of making and use thereof, coating

Abstract

This application relates to the technical field of coating preparation, specifically disclosing a coating composition for forming a coating on the inner surface of gloves, its preparation method, application, and coating. The coating composition comprises the following components by weight percentage: water 40-50%; polyurethane resin 35-50%; thickener 1-10%; hand-feeling agent 2-6%; and auxiliary release agent 2-10%. The auxiliary release agent is selected from any one or two of organosilicon microsphere dispersions and polymeric polyether-modified siloxanes. When the coating prepared by the coating composition provided in this application is used as an inner surface coating for gloves, it results in lower adhesion between the inner surface of the glove and the hand mold. Therefore, disposable gloves with an inner surface coating formed using the coating composition of this application are easier to peel off from the hand mold.

Description

Technical Field

[0001] This application relates to the technical field of coating preparation, and more specifically, to a coating composition for forming a coating on the inner surface of a glove, a method for preparing the composition, its application, and the coating itself. Background Technology

[0002] Powder-free disposable PVC (polyvinyl chloride) gloves have advantages such as chemical resistance, flame retardancy, high strength, ease of processing, and low price, and occupy a place in the glove industry. However, the inner surface of PVC gloves is rough and sticky, making them difficult to demold and put on and take off. To achieve a smooth feel, an inner coating must be added.

[0003] Powder-free disposable PVC gloves typically employ a PVC layer plus an inner coating. The inner coating is a polymer compound uniformly applied to the inner surface of the glove, forming a thin film through adhesion. Currently, commonly used inner glove coatings are mainly classified into two categories based on their chemical structure: polyacrylate (PA) and polyurethane (PU).

[0004] However, gloves with a polyurethane inner coating still face the challenge of difficult demolding. Therefore, a new approach is urgently needed to solve this problem. Summary of the Invention

[0005] This application provides a coating composition for forming a coating on the inner surface of gloves, a method for preparing the composition, and its application and coating. Disposable gloves with an inner 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 for forming a coating on the inner surface of a glove, employing the following technical solution:

[0007] A coating composition for forming a coating on the inner surface of a glove, the coating composition comprising the following components by weight percentage: 40-50% water; 35-50% polyurethane resin; 1-10% thickener; 2-6% hand feel agent; 2-10% auxiliary release agent; wherein the auxiliary release agent is selected from any one or two of organosilicon microsphere dispersions and polymeric polyether-modified siloxanes.

[0008] This application provides a coating composition for forming an inner surface coating of a glove. The inner surface coating formed using this coating composition exhibits low adhesion between the glove and the hand mold. When demolding, gloves coated with this inner surface coating are easier to peel off the hand mold due to the lower adhesion between the inner surface of the glove and the hand mold. Furthermore, the inner surface coating of the glove prepared using this coating composition can effectively improve the puncture resistance of gloves using this coating composition as the inner surface coating, thereby improving the mechanical properties of the glove and thus providing better protection for the wearer.

[0009] Optionally, the auxiliary release agent includes organosilicon microsphere dispersion and polymer polyether modified siloxane.

[0010] Optionally, the auxiliary release agent comprises the following components in parts by weight: 2-5 parts of organosilicon microsphere dispersion; 4-12 parts of polymer polyether modified siloxane.

[0011] Optionally, the organosilicon microsphere dispersion is 3-4 parts by weight.

[0012] Optionally, the polymeric polyether-modified siloxane is present in parts by weight of 6-10.

[0013] Optionally, the auxiliary release agent further includes 10-18 parts of polyurethane dispersion.

[0014] Optionally, the polyurethane dispersion is 12-16 parts by weight.

[0015] In one specific implementation, the organosilicon microsphere dispersion is in the following weight proportions: 2 parts, 3 parts, 3.5 parts, 4 parts, and 5 parts.

[0016] In some specific implementations, the organosilicon microsphere dispersion is in the following weight proportions: 2-3 parts, 2-3.5 parts, 2-4 parts, 3-3.5 parts, 3-4 parts, 3-5 parts, 3.5-4 parts, 3.5-5 parts, and 4-5 parts.

[0017] In one specific implementation, the polymeric polyether-modified siloxane is present in parts by weight of 4, 6, 8, 10, or 12.

[0018] In some specific implementations, the polymeric polyether-modified siloxane is present in parts by weight of 4-6 parts, 4-8 parts, 4-10 parts, 6-8 parts, 6-10 parts, 6-12 parts, 8-10 parts, 8-12 parts, or 10-12 parts.

[0019] In one specific embodiment, the polyurethane dispersion is in the form of 10 parts, 12 parts, 14 parts, 16 parts, or 18 parts by weight.

[0020] In some specific embodiments, the polyurethane dispersion is in the following weight proportions: 10-12 parts, 10-14 parts, 10-16 parts, 12-14 parts, 12-16 parts, 12-18 parts, 14-16 parts, 14-18 parts, and 16-18 parts.

[0021] In this application, by adjusting the addition of organosilicon microsphere dispersion and polymeric polyether-modified siloxane in the auxiliary release agent, the adhesion force between the inner surface coating formed by the coating composition and the hand mold is further reduced, making it easier to peel the glove off the hand mold after manufacturing. Simultaneously, the puncture resistance of gloves using this coating composition as the inner surface coating is further improved, enhancing the glove's mechanical properties and thus providing better protection for the wearer.

[0022] Secondly, this application provides a method for preparing a coating composition for forming a coating on the inner surface of a glove, using the following technical solution:

[0023] A method for preparing a coating composition for forming a coating on the inner surface of a glove, the method specifically comprising the following steps:

[0024] While stirring, add the feeler to the water at a stirring speed of 100-300 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 the auxiliary release agent 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 for forming an inner surface coating of a glove 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 for forming a coating on the inner surface of a glove.

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

[0031] This application provides a coating composition for forming a coating on the inner surface of a glove, wherein the inner surface coating formed by the coating composition has low adhesion to the hand mold. When demolding, gloves coated with this inner surface coating are easier to peel off from the hand mold due to the low adhesion between the inner surface of the glove and the hand mold.

[0032] Furthermore, the inner surface coating of gloves prepared using this coating composition can effectively improve the puncture resistance of gloves using this coating composition as the inner surface coating, and improve the mechanical properties of the gloves, thus making them more beneficial to the wearer. 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 for forming a coating on the inner surface of a glove, the coating composition comprising the following components by weight percentage: 40-50% water; 35-50% polyurethane resin; 1-10% thickener; 2-6% hand feel agent; 2-10% auxiliary release agent; the auxiliary release agent is selected from any one or two of organosilicon microsphere dispersions and polymer polyether modified siloxanes.

[0035] Further, the auxiliary release agent includes an organosilicon microsphere dispersion and a polymeric polyether-modified siloxane. Specifically, it comprises the following components in parts by weight: 2-5 parts of organosilicon microsphere dispersion; 4-12 parts of polymeric polyether-modified siloxane. Preferably, the organosilicon microsphere dispersion comprises 3-4 parts by weight, and the polymeric polyether-modified siloxane comprises 6-10 parts by weight. Further, the auxiliary release agent also includes 10-18 parts of a polyurethane dispersion. Preferably, the polyurethane dispersion comprises 12-16 parts by weight.

[0036] This application provides a method for preparing a coating composition for forming a coating on the inner surface of a glove, specifically including the following steps:

[0037] While stirring, add the feeler to the water at a stirring speed of 100-300 r / min;

[0038] After dispersing for 10-20 minutes, continue adding polyurethane resin while stirring at a speed of 200-400 r / min.

[0039] After dispersing for 10-20 minutes, continue adding the thickener while stirring at a speed of 500-700 rpm.

[0040] After dispersing for 20-40 minutes, continue to add the auxiliary release agent while stirring at a stirring speed of 200-400 r / min, and disperse for 10-20 minutes to obtain the coating composition.

[0041] Furthermore, this application also provides the application of the above-mentioned coating composition for forming the inner surface coating of gloves in the preparation of the outer surface coating of medical surgical gloves, disposable examination gloves, or high-end military and civilian protective gloves. It also describes the coating formed using the above-mentioned coating composition.

[0042] The following materials were purchased: Hand feel agent (H4102) from Guangzhou Sloc Chemical Co., Ltd.; polyurethane resin (YC-306) from Anhui Yuanchen New Material Technology Co., Ltd.; thickener (RT-360) from Beijing Runbo Hengtong Technology Co., Ltd.; high-molecular-weight polyether-modified siloxane (3300) from Guangzhou Sloc Chemical Co., Ltd.; organosilicon microsphere dispersion (FE212U) from Yongqi Materials Technology (Shanghai) Co., Ltd.; and polyurethane dispersion (YC-306) from Anhui Yuanchen New Material Technology Co., Ltd.

[0043] 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.

[0044] The present application will be further described in detail below with reference to embodiments, comparative examples and performance test results.

[0045] Example

[0046] Example 1

[0047] This embodiment provides a coating composition for forming a coating on the inner surface of a glove. The specific components of this coating composition are shown in Table 1.

[0048] The preparation method of the above coating composition specifically includes the following steps:

[0049] (1) Add water to the mixing tank, start the disperser, set the speed to 100-300 r / min, add the hand-feeling agent to the water while stirring, and disperse for 10 min.

[0050] (2) Continue to add polyurethane resin while stirring at a speed of 300 r / min and disperse for 10 min.

[0051] (3) Continue to add thickener while stirring at a speed of 600 r / min and disperse for 30 min.

[0052] (4) While stirring, continue to add the auxiliary release agent at a stirring speed of 300 r / min and disperse for 10 min to obtain the coating composition.

[0053] Example 2-22

[0054] Examples 2-22 each provide a coating composition for forming a coating on the inner surface of a glove. 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.

[0055] The differences between the above embodiments are as follows:

[0056] The difference between Examples 1-13 is that the amount of organosilicon microsphere dispersion, polymer polyether modified siloxane, or polyurethane dispersion added to the auxiliary release agent is different.

[0057] The difference between Examples 3 and 14-17 is that the weight percentage of the auxiliary release agent is different.

[0058] The difference between Examples 3 and 18-19 is that the weight percentage of the hand-feeling agent is different.

[0059] The difference between Examples 3 and 20-22 is that the addition of organosilicon microsphere dispersion and polymer polyether modified siloxane in the auxiliary release agent is different.

[0060] Comparative Example

[0061] Comparative Examples 1-2

[0062] Comparative Examples 1 and 2 each provide a coating composition for forming a coating on the inner surface of a glove. 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.

[0063] The differences between the above comparisons are as follows:

[0064] The difference between Comparative Example 1 and Example 3 is that no auxiliary release agent was added.

[0065] The difference between Comparative Example 2 and Example 3 is that no feel agent was added.

[0066] Comparative Example 3

[0067] This comparative example provides a coating composition. The difference between this comparative example and Example 3 is that this comparative example also includes 4% wetting agent, specifically polyether-modified polysiloxane, purchased from Umet (Beijing) Environmental Materials Technology Co., Ltd., model YMT-245.

[0068] Table 1. Addition details of each component in the examples and comparative examples.

[0069]

[0070]

[0071] Performance testing

[0072] I. The following test indicators of the coating compositions of the above embodiments and comparative examples were tested respectively.

[0073] (1) Original liquid viscosity: The original liquid viscosity of the coating composition was tested at 25℃ using an ND-1 type viscometer (3# rotor).

[0074] (2) pH value: The coating composition was diluted at a ratio of 1:20, and the pH of the diluted solution was measured.

[0075] (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%.

[0076] The testing standards for the above indicators and the test results of the above examples and comparative examples are shown in Table 2.

[0077] Table 2 shows the test results of the examples and comparative examples.

[0078] 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％

[0079] 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.

[0080] 2. The adhesion between the coatings prepared by the coating compositions of the above embodiments and comparative examples and the hand molds was tested respectively.

[0081] 1. The specific manufacturing process of polyurethane gloves is as follows:

[0082] (1) Clean the hand mold and dry it in an oven at 120°C;

[0083] (2) Dip the hand mold in a diluted solution of the coating composition of the above examples and comparative examples (dilution ratio of 1:20) to form an inner surface coating of polyurethane gloves, and dry it in an oven at 120°C.

[0084] (3) Continue to apply polyurethane resin (purchased from Hefei Ketian Waterborne Technology Co., Ltd., model KT713A) to the hand mold to form a polyurethane resin layer. Place it in an oven at 120℃ to dry. Repeat this process 2-4 times.

[0085] (4) Demolding, i.e., obtaining polyurethane gloves.

[0086] 2. The method for testing adhesion is as follows:

[0087] The adhesion between the coatings prepared by the coating compositions of the above embodiments and comparative examples and the hand molds was tested using a tensile testing instrument.

[0088] The specific method is as follows: After the hand mold, coated with the inner surface coating, polyurethane resin layer, and outer surface coating and dried, is placed at the testing position of the tensile testing instrument, the edge of the polyurethane glove is folded over to a height of 1 ± 0.5 cm. The force point of the tensile testing instrument is fixed to the folded edge of the glove, the tensile testing instrument is started, and the pulling force required to peel the glove off the hand mold is recorded. The tensile testing instrument has three force points, evenly distributed around the glove.

[0089] The test results are shown in Table 3.

[0090] Table 3 Adhesion test results

[0091]

[0092] As shown in Table 3, by comparing the test results of Example 3 and the control group, it can be seen that using the coating composition of this application as the inner surface coating can effectively reduce the adhesion between the glove and the hand mold, thereby making it easier to peel the glove off the hand mold and more conducive to the industrial production of gloves.

[0093] Comparing the test results of Examples 1-5, it can be seen that when the amount of silicone microsphere dispersion added to the auxiliary release agent is 2-5 parts, the adhesion between the coating formed by the coating composition and the hand mold is reduced. Furthermore, controlling the amount of silicone microsphere dispersion added to 3-4 parts can further reduce the adhesion between the coating formed by the coating composition and the hand mold. Therefore, to further reduce the adhesion between the coating formed by the coating composition and the hand mold, the amount of silicone microsphere dispersion added is controlled at 3-4 parts.

[0094] Comparing the test results of Examples 3 and 6-9, it can be seen that when the amount of polymeric polyether-modified siloxane added to the auxiliary release agent is 4-12 parts, the adhesion between the coating formed by this coating composition and the hand mold is reduced. Furthermore, controlling the amount of polymeric polyether-modified siloxane added to 6-10 parts can further reduce the adhesion between the coating formed by this coating composition and the hand mold. Therefore, to further reduce the adhesion between the coating formed by this coating composition and the hand mold, the amount of polymeric polyether-modified siloxane added is controlled at 6-10 parts.

[0095] Comparing the test results of Examples 3 and 10-13, it can be seen that when the amount of polyurethane dispersion added to the auxiliary release agent is 10-18 parts, the adhesion between the coating formed by the coating composition and the hand mold is reduced. Furthermore, controlling the amount of polyurethane dispersion added to 12-16 parts can further reduce the adhesion between the coating formed by the coating composition and the hand mold. Therefore, to further reduce the adhesion between the coating formed by the coating composition and the hand mold, the amount of polyurethane dispersion added is selected to be controlled at 12-16 parts.

[0096] Comparing the test results of Examples 3 and 14-17, it can be seen that by controlling the amount of auxiliary release agent added to 2-10 parts, the adhesion between the coating formed by the coating composition and the hand mold can be controlled within a low range. Therefore, in order to further reduce the adhesion between the coating formed by the coating composition and the hand mold, the amount of auxiliary release agent added to the coating composition is controlled to 2-10 parts.

[0097] Comparing the test results of Examples 3 and 18-19, it can be seen that by controlling the amount of the hand-feeling agent added to 2-6 parts, the adhesion between the coating formed by the coating composition and the hand mold can be controlled within a low range. Therefore, in order to further reduce the adhesion between the coating formed by the coating composition and the hand mold, the amount of the hand-feeling agent added to the coating composition is controlled to 2-6 parts.

[0098] Comparing the test results of Examples 20-22, it can be seen that when the auxiliary release agent is alone an organosilicon microsphere dispersion, a polymer polyether-modified siloxane, or a mixture of organosilicon microsphere dispersion and polymer polyether-modified siloxane, the adhesion between the coating formed by the coating composition and the hand mold can be controlled within a low range. However, the effect is better when the auxiliary release agent is a mixture of organosilicon microsphere dispersion and polymer polyether-modified siloxane. Furthermore, comparing the test results of Examples 3 and 22, it can be seen that the effect is better when the auxiliary release agent is a mixture of organosilicon microsphere dispersion, polymer polyether-modified siloxane, and polyurethane dispersion than when the auxiliary release agent is a mixture of organosilicon microsphere dispersion and polymer polyether-modified siloxane.

[0099] Comparing the test results of Example 3 and Comparative Examples 1-2, it can be seen that in Comparative Example 1, when the coating composition does not contain an auxiliary release agent, or in Comparative Example 2, when the coating composition does not contain a hand-feeling agent, the adhesion between the coating formed by the coating composition and the hand mold is relatively high. However, in Example 3, when the coating composition contains both an auxiliary release agent and a hand-feeling agent, the adhesion between the coating formed by the coating composition and the hand mold is relatively low. Therefore, it is demonstrated that the coating composition of this application, under the combined action of the hand-feeling agent and the auxiliary release agent, can further reduce the adhesion between the coating formed by the coating composition and the hand mold. Therefore, when preparing polyurethane gloves, due to the lower adhesion between the inner surface of the glove and the hand mold, polyurethane gloves with the coating composition of this application applied to the inner surface are easier to demold.

[0100] Furthermore, the addition of a wetting agent in Comparative Example 3 resulted in higher adhesion between the coating formed by this paint composition and the hand mold, making demolding difficult. Additionally, holes appeared during glove manufacturing, and the material at these holes adhered to the hand mold, making removal difficult. Therefore, omitting a wetting agent from the paint composition used as the inner surface coating facilitates demolding and improves the yield rate of the finished gloves.

[0101] 3. The puncture resistance of polyurethane gloves with inner surface coatings prepared by impregnation with the coating compositions of the above examples and comparative examples was tested.

[0102] 1. The specific manufacturing process of polyurethane gloves is as follows:

[0103] (1) Clean the hand mold and dry it in an oven at 120°C;

[0104] (2) Dip the hand mold in a diluted solution of the coating composition of the above examples and comparative examples (dilution ratio of 1:20) to form an inner surface coating of polyurethane gloves, and dry it in an oven at 120°C.

[0105] (3) Continue to apply polyurethane resin (purchased from Hefei Ketian Waterborne Technology Co., Ltd., model KT713A) to the hand mold to form a polyurethane resin layer. Place it in an oven at 120℃ to dry. Repeat this process 2-4 times.

[0106] (4) Demolding, i.e., obtaining polyurethane gloves.

[0107] 2. The test method for puncture resistance is as follows:

[0108] Puncture resistance is defined as the force required to pierce a fixed specimen with a steel needle of a certain size. This differs from puncture with a fine needle or other sharp object. The puncture resistance of polyurethane gloves was tested using a low-inertia compression apparatus capable of measuring 0-500 N, a steel needle mounted on the central axis of the apparatus, and a fixing device to hold the specimen in place on the central axis. The Rockwell hardness of the steel needle was 60 HRC, and the needle tip diameter was 1 ± 0.02 mm. The puncture resistance grades are shown in Table 4.

[0109] Table 4 Puncture Resistance Rating

[0110] Performance level Strength (N) 1 20 2 60 3 100 4 150

[0111] Three circular samples with a diameter of not less than 40 mm were cut from the prepared polyurethane gloves to form three sets of samples. The sample was clamped in the center of a fixing device, ensuring the outer surface was directly facing the steel needle. The steel needle was moved downwards towards the sample at a speed of 100 mm / min until the displacement relative to the sample reached 50 mm. The maximum force was recorded during this period, even if the sample was not yet penetrated. The average value of the three sets of tests was taken as the puncture resistance performance of that test group. Simultaneously, a sample of a polyurethane glove without an inner surface coating was used as a control group, and the same puncture resistance performance test was performed.

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

[0113] Table 5. Results of puncture resistance test

[0114]

[0115] As shown in Table 5, by comparing the test results of Example 3 and the control group, it can be seen that using the coating composition of this application as the inner surface coating can effectively improve the puncture resistance of polyurethane gloves using the coating composition as the inner surface coating, improve the mechanical properties of the gloves, and is more conducive to protecting the wearer.

[0116] Comparing the test results of Examples 1-5, it is evident that when the amount of silicone microsphere dispersion added to the auxiliary release agent is 2-5 parts, the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating can be effectively improved. Furthermore, controlling the amount of silicone microsphere dispersion added to 3-4 parts further improves the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating. Therefore, to achieve even higher puncture resistance for polyurethane gloves using this coating composition as the inner surface coating, the amount of silicone microsphere dispersion added is controlled at 3-4 parts.

[0117] Comparing the test results of Examples 3 and 6-9, it is evident that when the amount of polymeric polyether-modified siloxane added to the auxiliary release agent is 4-12 parts, the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating can be effectively improved. Furthermore, controlling the amount of polymeric polyether-modified siloxane added to 6-10 parts can further improve the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating. Therefore, to achieve even higher puncture resistance of polyurethane gloves using this coating composition as the inner surface coating, the amount of polymeric polyether-modified siloxane added is controlled at 6-10 parts.

[0118] Comparing the test results of Examples 3 and 10-13, it is evident that when the amount of polyurethane dispersion added to the auxiliary release agent is 10-18 parts, the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating can be effectively improved. Furthermore, controlling the amount of polyurethane dispersion added to 12-16 parts can further improve the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating. Therefore, to achieve even higher puncture resistance of polyurethane gloves using this coating composition as the inner surface coating, the amount of polyurethane dispersion added is selected to be controlled at 12-16 parts.

[0119] Comparing the test results of Examples 3 and 14-17, it can be seen that controlling the amount of auxiliary release agent added to 2-10 parts can effectively improve the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating. Therefore, in order to improve the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating, the amount of auxiliary release agent added to the coating composition is controlled to 2-10 parts.

[0120] Comparing the test results of Examples 20-22, it can be seen that when the auxiliary release agent is alone an organosilicon microsphere dispersion, a polymeric polyether-modified siloxane, or a mixture of organosilicon microsphere dispersion and polymeric polyether-modified siloxane, all can effectively improve the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating. However, the effect is better when the auxiliary release agent is a mixture of organosilicon microsphere dispersion and polymeric polyether-modified siloxane. Furthermore, comparing the test results of Examples 3 and 22, it can be seen that the effect is better when the auxiliary release agent is a mixture of organosilicon microsphere dispersion, polymeric polyether-modified siloxane, and polyurethane dispersion than when the auxiliary release agent is a mixture of organosilicon microsphere dispersion and polymeric polyether-modified siloxane.

[0121] Comparing the test results of Examples 3 and 18-19, it can be seen that controlling the amount of the hand-feeling agent added to 2-6 parts can effectively improve the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating. Therefore, in order to improve the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating, the amount of the hand-feeling agent added to the coating composition is controlled to 2-6 parts.

[0122] Comparing the test results of Example 3 and Comparative Examples 1-2, it can be seen that in Comparative Example 1, when the coating composition does not contain an auxiliary release agent, or in Comparative Example 2, when the coating composition does not contain a hand-feeling agent, the puncture resistance of the polyurethane gloves using this coating composition as the inner surface coating is relatively low. However, in Example 3, when the coating composition contains both an auxiliary release agent and a hand-feeling agent, the puncture resistance of the polyurethane gloves using this coating composition as the inner surface coating is relatively high. Therefore, it is demonstrated that the coating composition of this application, under the combined action of the hand-feeling agent and the auxiliary release agent, can further improve the puncture resistance of polyurethane gloves using this coating composition as the inner surface coating.

[0123] Furthermore, the addition of a wetting agent in Comparative Example 3 reduced the puncture resistance of the polyurethane gloves using this coating composition as the inner surface coating, affecting glove quality and the wearer's safety experience. Additionally, holes may appear during glove manufacturing, and the material at these holes may adhere to the hands, making it difficult to remove and hindering industrial production.

[0124] 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 for forming a coating on the inner surface of a glove, characterized in that, The coating composition comprises the following components by weight percentage: water 40-50%; polyurethane resin 35-50%; thickener 1-10%; hand feel agent 2-6%; and release agent 2-10%. The auxiliary release agent is composed of the following components in parts by weight: 3.5 parts of organosilicon microsphere dispersion; 6-10 parts of polymer polyether modified siloxane; and 14-16 parts of polyurethane dispersion. The tactile agent was purchased from Guangzhou Sloc Chemical Co., Ltd., model number H4102; the organosilicon microsphere dispersion was purchased from Yongqi Materials Technology (Shanghai) Co., Ltd., product number: FE212U; the high molecular weight polyether modified siloxane was purchased from Guangzhou Sloc Chemical Co., Ltd., model number 3300; and the polyurethane dispersion was purchased from Anhui Yuanchen New Material Technology Co., Ltd., model number YC-306.

2. A method for preparing the coating composition according to claim 1, characterized in that, The preparation method specifically includes the following steps: While stirring, add the feeler to the water at a stirring speed of 100-300 r / min; After dispersing for 10-20 minutes, continue adding polyurethane resin while stirring at a speed of 200-400 r / min. After dispersing for 10-20 minutes, continue adding the thickener while stirring at a speed of 500-700 rpm. After dispersing for 20-40 minutes, continue to add the auxiliary release agent while stirring at a stirring speed of 200-400 r / min, and disperse for 10-20 minutes to obtain the coating composition.

3. The use of the coating composition of claim 1 in the preparation of an outer surface coating for medical surgical gloves or disposable examination gloves.

4. A coating formed using the coating composition of claim 1.

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