Acid and alkali resistant and oil resistant ultrathin butyronitrile gloves and preparation method thereof

Abstract

The invention belongs to the technical field of butyronitrile glove preparation, and discloses an acid-base-resistant oil-resistant ultrathin butyronitrile glove and a preparation method thereof. The acid-base-resistant oil-resistant ultrathin butyronitrile gloves are prepared from butyronitrile emulsion, and the butyronitrile emulsion is prepared from carboxyl butyronitrile latex, hydrogenated styrene-butadiene latex, sulfur powder, hyperbranched resin, nano-silver, zinc oxide, a thickening agent, an accelerant, a stabilizer and water. The preparation method of the acid-base-resistant oil-resistant ultrathin butyronitrile gloves comprises the following steps: preheating a hand mold, and dipping the hand mold in a coagulator; dipping the hand mold in glue, drying and shaping to form a glue film; leaching and vulcanizing the adhesive film; and carrying out chlorine washing, alkali washing, water washing, drying and demolding on the rubber film to obtain the butyronitrile gloves. The butyronitrile glove prepared in the invention has relatively good mechanical properties on the premise of relatively thin thickness, and has relatively good acid resistance, alkali resistance and oil resistance.

Description

Technical Field

[0001] The present application relates to the technical field of nitrile gloves, and in particular to an acid, alkali and oil resistant ultra-thin nitrile glove and a preparation method thereof. Background Art

[0002] At present, in many industries such as medical and health care, food and health care, and electronics, the requirements for the protective performance of gloves are getting higher and higher, and the traditional types of gloves are only natural latex gloves, polyvinyl chloride gloves, nitrile gloves, polyethylene gloves, etc. Among them, polyethylene gloves have no elasticity and are used in a very small field. Polyvinyl chloride gloves have slightly better strength and elasticity and can be used for simple hand protection. The gloves with the best elasticity are only natural latex gloves and nitrile gloves. Nitrile gloves do not contain the protein in natural latex gloves and will not cause allergies when wearing gloves, so they gradually replace natural latex gloves. Finished nitrile gloves need to be thick enough to be acid- and alkali-resistant and corrosion-resistant when used. For some delicate operations, gloves that are too thick affect the accuracy of operations. Although there is a kind of glove with thin fingers and thick hands, the weak parts of the fingers are not acid- and alkali-resistant, and are easily damaged, causing harm to the human body. Finished nitrile gloves have poor oxidation resistance, low antibacterial performance, and poor solvent resistance. They are easy to breed bacteria or age and harden during use, affecting the work effect and comfort of users; and the existing nitrile glove manufacturing process requires frequent use of water for cleaning, sewage discharge affects the environment, and the treatment of large amounts of sewage also increases the manufacturing cost of enterprises. Summary of the invention

[0003] In order to solve the above technical problems, a nitrile glove with good oil resistance, corrosion resistance, aging resistance, puncture resistance and environmentally friendly preparation process is developed. The present application provides an acid, alkali and oil resistant ultra-thin nitrile glove and a preparation method.

[0004] In a first aspect, the present application provides an acid-, alkali- and oil-resistant ultra-thin nitrile glove prepared from a nitrile emulsion; the nitrile emulsion comprises the following raw materials in parts by weight: 80-140 parts of carboxylated nitrile latex, 5-12 parts of hydrogenated styrene butadiene latex, 1.5-3 parts of sulfur powder, 3-6 parts of hyperbranched resin, 1-2 parts of nano silver, 0.5-2.5 parts of zinc oxide, 2-3 parts of thickener, 1-3 parts of accelerator, 1-2 parts of stabilizer, and 40-60 parts of water.

[0005] Optionally, the preparation method of hydrogenated styrene butadiene latex comprises the following steps: adding styrene butadiene latex into a reaction container, heating to 55-60° C., adding hydrazine hydrate, stirring, adding boric acid, and simultaneously dripping hydrogen peroxide at a constant rate, reacting at a constant temperature for 2-3 hours after the dripping is completed, taking out the latex for demulsification, washing, and drying to obtain a hydrogenated styrene butadiene latex sample.

[0006] Optionally, the preparation method of hydrogenated styrene butadiene latex comprises the following steps: adding 8-16 parts by weight of styrene butadiene latex into a reaction container, heating to 55-60° C., adding 1-2 parts by weight of hydrazine hydrate, stirring, adding 0.3-0.6 parts by weight of boric acid, adding 3-5 parts by weight of hydrogen peroxide at a constant dropping rate of 0.5-2 ml / min, reacting at a constant temperature for 2-3 hours, taking out the latex, demulsifying it with isopropanol, washing it, and drying it to obtain a hydrogenated styrene butadiene latex sample.

[0007] By adopting the above technical scheme, the present application uses a hyperbranched resin to prepare a nitrile emulsion; styrene butadiene latex is an unsaturated polymer, and its molecular chain contains chemically active carbon-carbon double bonds, which are easily affected by heat, oxygen, ozone, light, etc. to undergo crosslinking or chain breaking reactions, thereby affecting the performance of rubber products. The present application uses an in-situ amine method to hydrogenate styrene butadiene latex to obtain hydrogenated styrene butadiene latex. The hydrogenated styrene butadiene latex has good compatibility with carboxyl nitrile latex, and can significantly improve the mechanical properties and heat resistance, oil resistance and aging resistance of nitrile gloves made from pure carboxyl nitrile latex, and can improve the overall effect of the prepared medical nitrile gloves, and is convenient for producing thin gloves for clinical use.

[0008] Optionally, the hyperbranched resin includes one or more of hyperbranched polyester, hyperbranched polyamide, hyperbranched polyester amide, hyperbranched polyimide ester or hyperbranched polysiloxane, and the branching degree of the hyperbranched resin is 0.3-0.6.

[0009] Optionally, the hyperbranched resin is a hyperbranched polyamide ester, and the hyperbranched resin is a terminal hydroxyl hyperbranched polymer with a branching degree of 0.5.

[0010] By adopting the above technical scheme, the present application prepares nitrile emulsion by using hyperbranched resin, and a large number of active groups such as hydroxyl, carboxyl, and amino groups may exist on the surface of the hyperbranched polymer, which is fully dispersed in water with fillers such as nano silver and zinc oxide in advance, thereby avoiding the agglomeration of nano-scale fillers or micron-scale fillers. On the other hand, during the vulcanization process of preparing gloves from the nitrile emulsion, the active groups on the surface of the hyperbranched polymer and the active groups in the carboxyl nitrile latex and the active groups on the surface of fillers such as nano silver and zinc oxide undergo cross-linking polymerization, which plays a significant reinforcing role in the single vulcanization system of the carboxyl nitrile latex. The hyperbranched resin wraps the two fillers, which can further enhance the anti-puncture effect of the material, and can also eliminate a large number of active groups in the carboxyl nitrile latex and hydrogenated styrene butadiene latex through cross-linking reactions, thereby improving the acid resistance, alkali resistance and mechanical strength of the prepared nitrile gloves as a whole.

[0011] Optionally, the accelerator is selected from one or more of sodium dibutyl dithiocarbamate, zinc diethyl dithiocarbamate, zinc dimethyl dithiocarbamate, zinc dibutyl dithiocarbamate or dibenzothiazole disulfide.

[0012] Optionally, the raw materials of the nitrile emulsion further include 1-2 parts of a surfactant, and the surfactant is selected from one or more of sodium dibutylnaphthalene sulfonate, sodium dodecylbenzene sulfonate and sodium fatty alcohol polyoxyethylene ether sulfate.

[0013] Optionally, the preparation method of the nitrile emulsion comprises the following steps: mixing nano silver, zinc oxide, hyperbranched resin, thickener and water, grinding and stirring to obtain a mixed slurry; mixing the mixed slurry with the remaining raw materials and stirring, adjusting the viscosity to 1500-4000mPa.s to obtain the nitrile emulsion.

[0014] Optionally, the particle size of the powder in the mixed slurry is less than or equal to 3 um.

[0015] In a second aspect, the present application provides a method for preparing the above-mentioned acid-resistant, alkali-resistant and oil-resistant ultra-thin nitrile gloves, comprising the following steps: S1. Immerse the cleaned hand model in hot water for preheating, then immerse it in a tank containing a coagulant, control the temperature to 60-70°C, immerse, and dry; S2, dipping the impregnated hand model into nitrile emulsion for dipping, drying and shaping to form an adhesive film, and curling and trimming the adhesive film for standby use; S3, subjecting the film treated in step S2 to hot water leaching, controlling the temperature to 50-55° C., and then vulcanizing, and cooling after the vulcanization is completed; S4, washing the film treated in step S3 with chlorine, alkali and water in sequence, drying, removing the film from the hand mold, and obtaining acid-, alkali- and oil-resistant ultra-thin nitrile gloves.

[0016] Optionally, in step S1, the coagulant comprises the following raw materials in parts by weight: 8-15 parts of calcium nitrate, 3-6 parts of chitosan, 0.5-1 part of sodium lignin sulfonate and 70-100 parts of water.

[0017] By adopting the above technical solution, the particles in the calcium nitrate can neutralize the charge of the colloidal particles, thereby reducing the fluidity of the latex and solidifying the nitrile emulsion on the hand model; chitosan can promote the nitrile emulsion to be evenly distributed on the surface of the hand model, and has very good affinity with acrylonitrile and carboxyl in carboxyl nitrile latex.

[0018] Optionally, in step S3, the vulcanization process is divided into low-temperature vulcanization and high-temperature vulcanization in sequence. In the low-temperature vulcanization process, the vulcanization temperature is 60-80°C and the vulcanization time is 20-50 minutes; in the high-temperature vulcanization process, the vulcanization temperature is 90-110°C and the vulcanization time is 40-70 minutes.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, hydrogenated styrene butadiene latex and hyperbranched resin are added to the nitrile emulsion and combined with an appropriate proportion of auxiliaries and fillers, so that the prepared nitrile gloves have good mechanical properties under the premise of thin thickness; the hyperbranched resin is cross-linked during the vulcanization process to eliminate most of the active groups, and at the same time, the two fillers are wrapped, so that the prepared nitrile gloves have good acid resistance, alkali resistance and oil resistance under the premise of thin thickness; at the same time, the nitrile gloves prepared in the present application do not use materials harmful to the human body, and there is no adverse reaction to human skin and eyes contact, and are suitable for the cleanliness requirements in the production processes of multiple industries such as microcomputers, integrated circuits, semiconductors and new materials, hard disks, polysilicon, LEDs, etc.

[0020] 2. The preparation process of the acid, alkali and oil resistant ultra-thin nitrile gloves in this application is simple. By using a specifically formulated nitrile emulsion and coagulant, the amount of water used in chlorine washing, alkali washing and water washing can be greatly reduced, thereby avoiding the generation of a large amount of sewage and causing environmental pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The FTIR spectrum of the burning residue of the nitrile gloves prepared in Example 6 after being measured by Fourier transform infrared spectrometer. DETAILED DESCRIPTION

[0022] The present application designs an acid, alkali and oil resistant ultra-thin nitrile glove, which is prepared from a nitrile emulsion; the nitrile emulsion comprises the following raw materials in parts by weight: 80-140 parts of carboxyl nitrile latex, 5-12 parts of hydrogenated styrene butadiene latex, 1.5-3 parts of sulfur powder, 3-6 parts of hyperbranched resin, 1-2 parts of nanosilver, 0.5-2.5 parts of zinc oxide, 2-3 parts of thickener, 1-3 parts of accelerator, 1-2 parts of stabilizer and 40-60 parts of water.

[0023] The acid, alkali and oil resistant ultra-thin nitrile gloves of the present application are prepared by the following method, including the following steps: S1. Immerse the cleaned hand model in hot water for preheating, then immerse it in a tank containing a coagulant, control the temperature to 60-70°C, immerse, and dry; S2, dipping the impregnated hand model into nitrile emulsion for dipping, drying and shaping to form an adhesive film, and curling and trimming the adhesive film for standby use; S3, subjecting the film treated in step S2 to hot water leaching, controlling the temperature to 50-55° C., and then vulcanizing, and cooling after the vulcanization is completed; S4, washing the film treated in step S3 with chlorine, alkali and water in sequence, drying, removing the film from the hand mold, and obtaining acid-, alkali- and oil-resistant ultra-thin nitrile gloves.

[0024] The technical problem solved by this application is that the nitrile gloves in the prior art need to be thick enough to be acid-resistant and alkali-resistant, and corrosion-resistant when used. For some delicate operations, the gloves are too thick to affect the operating accuracy. At the same time, the finished nitrile gloves have poor oxidation resistance and low antibacterial performance, and the acid, alkali and oil resistance cannot meet the medical scene; and the existing nitrile gloves need to be frequently cleaned with water during the manufacturing process, and the sewage discharge affects the environment, and the treatment of a large amount of sewage also increases the manufacturing cost of the enterprise. This application adds hydrogenated styrene butadiene latex and hyperbranched resin to the nitrile emulsion and combines the auxiliary agent and filler in an appropriate proportion, so that the prepared nitrile gloves have good mechanical properties and anti-puncture effect and good acid resistance, alkali resistance and oil resistance under the premise of thin thickness; in addition, the preparation process of the acid-resistant, alkali-resistant and oil-resistant ultra-thin nitrile gloves in this application is simple, and by using a specific formula of nitrile emulsion and coagulant, the water consumption in the chlorine washing, alkali washing and water washing processes can be greatly reduced, thereby avoiding the generation of a large amount of sewage to bring environmental pressure.

[0025] The present application is further described in detail below in conjunction with specific embodiments.

[0026] Preparation Example 1-6 Preparation Examples 1-6 are different nitrile emulsions prepared, the difference being that the raw material ratios are different, as follows: The nitrile emulsion in Preparation Example 1 includes the following raw materials in parts by weight: 120 parts of carboxylated nitrile latex, 10 parts of hydrogenated styrene butadiene latex, 2 parts of sulfur powder, 5 parts of hyperbranched resin, 1.2 parts of nanosilver, 1 part of zinc oxide, 2.2 parts of thickener, 1.5 parts of accelerator, 1.2 parts of stabilizer, and 50 parts of water.

[0027] The nitrile emulsion in Preparation Example 2 includes the following raw materials in parts by weight: 80 parts of carboxylated nitrile latex, 12 parts of hydrogenated styrene butadiene latex, 1.5 parts of sulfur powder, 3 parts of hyperbranched resin, 1 part of nanosilver, 0.5 parts of zinc oxide, 2 parts of thickener, 1 part of accelerator, 1 part of stabilizer, and 40 parts of water.

[0028] The nitrile emulsion in Preparation Example 3 includes the following raw materials in parts by weight: 140 parts of carboxylated nitrile latex, 5 parts of hydrogenated styrene butadiene latex, 3 parts of sulfur powder, 6 parts of hyperbranched resin, 2 parts of nanosilver, 2 parts of zinc oxide, 3 parts of thickener, 3 parts of accelerator, 2 parts of stabilizer, and 60 parts of water.

[0029] The nitrile emulsion in Preparation Example 4 includes the following raw materials in parts by weight: 120 parts of carboxylated nitrile latex, 5 parts of hydrogenated styrene butadiene latex, 2 parts of sulfur powder, 6 parts of hyperbranched resin, 1.2 parts of nanosilver, 1 part of zinc oxide, 2.2 parts of thickener, 1.5 parts of accelerator, 1.2 parts of stabilizer, and 50 parts of water.

[0030] The nitrile emulsion in Preparation Example 5 includes the following raw materials in parts by weight: 120 parts of carboxylated nitrile latex, 12 parts of hydrogenated styrene butadiene latex, 2 parts of sulfur powder, 3 parts of hyperbranched resin, 1.2 parts of nanosilver, 1 part of zinc oxide, 2.2 parts of thickener, 1.5 parts of accelerator, 1.2 parts of stabilizer, and 50 parts of water.

[0031] The nitrile emulsion in Preparation Example 6 includes the following raw materials in parts by weight: 120 parts of carboxylated nitrile latex, 10 parts of hydrogenated styrene butadiene latex, 2 parts of sulfur powder, 5 parts of hyperbranched resin, 1.2 parts of nanosilver, 1 part of zinc oxide, 2.2 parts of thickener, 1.5 parts of accelerator, 1.2 parts of stabilizer, 50 parts of water, and 1 part of surfactant.

[0032] The carboxylated nitrile latex used in Preparation Examples 1-6 was purchased from Zibo Xiechuang Chemical Co., Ltd.

[0033] The hyperbranched resin used in Preparation Examples 1-6 is a hyperbranched polyamide ester, a HyPer HPN type hydroxyl-terminated hyperbranched polymer purchased from Wuhan Hyperbranched Resin Technology Co., Ltd., with a branching degree of 0.5.

[0034] The thickener used in Preparation Example 1-6 is carboxymethyl cellulose.

[0035] The accelerator used in Preparation Example 1-6 is sodium dibutyldithiocarbamate.

[0036] The stabilizer used in Preparation Examples 1-6 is a zinc-calcium stabilizer, Daostab 2022 zinc-calcium stabilizer purchased from Daojin Chemical.

[0037] The surfactant used in Preparation Example 6 is sodium dodecylbenzene sulfonate.

[0038] The preparation process of the hydrogenated styrene-butadiene latex used in Preparation Example 1-6 comprises the following steps: Add 12 kg of styrene butadiene latex into a reaction container, heat to 60°C, add 1 kg of hydrazine hydrate, stir, add 0.5 kg of boric acid, add 3 kg of hydrogen peroxide at a constant dropping rate of 1 mL / min, react at 60°C for 3 hours, take out the liquid part of the latex, add isopropanol to demulsify, wash, and dry to obtain a hydrogenated styrene butadiene latex sample.

[0039] The styrene-butadiene latex was purchased from Jiangsu Yatai Chemical Industry Co., Ltd., with the model of SBR latex, a solid content of 40.0±1%, and a viscosity (25° C.) of 25-45 mPa.s; and the hydrazine hydrate was purchased from 80% hydrazine hydrate of Arkema.

[0040] The preparation method of the nitrile emulsion in Preparation Example 1-6 comprises the following steps: Nano silver, zinc oxide, hyperbranched resin, thickener and water are mixed, ground to a powder particle size of less than 3 μm, and the powder and liquid are stirred to be evenly dispersed to obtain a mixed slurry; the mixed slurry is mixed and stirred with the remaining raw materials, and the viscosity is adjusted to 2500 mpa.s to obtain a nitrile emulsion.

[0041] Examples 1-6 Examples 1-6 are different acid-, alkali- and oil-resistant ultra-thin nitrile gloves prepared, the difference being that the formulas of the nitrile emulsions are different. The nitrile emulsions used in the acid-, alkali- and oil-resistant ultra-thin nitrile gloves prepared in Examples 1-6 correspond to the nitrile emulsions prepared in Preparation Examples 1-6, as shown in Table 1.

[0042] Table 1 Nitrile gloves Nitrile emulsion Example 1 Preparation Example 1 Example 2 Preparation Example 2 Example 3 Preparation Example 3 Example 4 Preparation Example 4 Example 5 Preparation Example 5 Example 6 Preparation Example 6 The method for preparing the acid-, alkali- and oil-resistant ultra-thin nitrile gloves in Examples 1-6 comprises the following steps: S1. Immerse the cleaned hand model in hot water for preheating, then immerse it in a tank containing a coagulant, control the temperature to 60°C, immerse for 2 minutes, take it out, and dry it at 90°C; S2, immersing the impregnated hand model into nitrile emulsion for dipping, controlling the dipping temperature to be 30° C., the dipping time to be 80 seconds, and then drying and shaping at 80° C. to form a film, and curling and trimming the film for standby use; S3, subjecting the film treated in step S2 to hot water leaching, controlling the leaching water temperature to 50°C, and then vulcanizing, sequentially performing low-temperature vulcanization and high-temperature vulcanization, in which the vulcanization temperature is 70°C and the vulcanization time is 40 minutes during the low-temperature vulcanization process, and the vulcanization temperature is 110°C and the vulcanization time is 40 minutes during the high-temperature vulcanization process, and naturally cooling to room temperature after the vulcanization is completed; S4, the film treated in step S3 is immersed in chlorine water and potassium hydroxide aqueous solution with a pH value of about 12 in turn, the temperature of the chlorine water and the potassium hydroxide aqueous solution are both 40° C., then washed with water, dried at 40° C., and the film is removed from the hand mold to obtain acid, alkali and oil resistant ultra-thin nitrile gloves.

[0043] The coagulant used in Examples 1-6 includes the following raw materials in parts by weight: 12 parts by weight of calcium nitrate, 5 parts by weight of chitosan, 1 part by weight of sodium lignin sulfonate and 100 parts by weight of water.

[0044] Embodiment 7-8 Example 7 is based on Example 6, except that the accelerator used in Example 7 is replaced by dibenzothiazole disulfide.

[0045] Example 8 is based on Example 6, except that the accelerator used in Example 8 is replaced by a mixture of sodium dibutyl dithiocarbamate and dibenzothiazole disulfide in a weight ratio of 1:1.

[0046] Example 9 Example 9 is based on Example 6, except that the hyperbranched polymer used in Example 9 is replaced by a carboxyl-terminated hyperbranched polyester purchased from Suzhou Haibote Resin Technology Co., Ltd., with a specific model of HyPer C104.

[0047] Example 10 Example 10 is based on Example 6, except that: the preparation method of the nitrile emulsion in Example 10 comprises the following steps: mixing nano silver, zinc oxide, a thickener and water, grinding to a powder particle size of less than 3 μm, stirring the powder and liquid to make them uniformly dispersed, and preparing a mixed slurry; mixing the mixed slurry with carboxyl nitrile latex, hydrogenated styrene butadiene latex, sulfur powder, accelerator, stabilizer and hyperbranched resin, and adjusting the viscosity to 2500 mPa.s to prepare the nitrile emulsion.

[0048] Comparative Example 1 Comparative Example 1 is based on Example 6, except that in Comparative Example 1, hydrogenated styrene butadiene latex is replaced by an equal amount of styrene butadiene latex.

[0049] Comparative Example 2 Comparative Example 2 is based on Example 6, except that in Comparative Example 2, the hyperbranched resin is replaced with an equal amount of bisphenol A epoxy resin.

[0050] The preparation method of the nitrile emulsion in Comparative Example 2 comprises the following steps: Nano silver, zinc oxide, bisphenol A epoxy resin, thickener and water are mixed, ground to a powder particle size of less than 3 μm, and the powder and liquid are stirred to be evenly dispersed to obtain a mixed slurry; the mixed slurry is mixed and stirred with carboxyl nitrile latex, hydrogenated styrene butadiene latex, sulfur powder, accelerator and stabilizer, and the viscosity is adjusted to 2500 mpa.s to obtain a nitrile emulsion.

[0051] Comparative Example 3 Comparative Example 3 is based on Example 6, except that no hyperbranched resin is added in Comparative Example 3.

[0052] The preparation method of the nitrile emulsion in Comparative Example 3 comprises the following steps: Nano silver, zinc oxide, thickener and water are mixed, ground to a powder particle size of less than 3 μm, and the powder and liquid are stirred to be evenly dispersed to obtain a mixed slurry; the mixed slurry is mixed and stirred with carboxyl nitrile latex, hydrogenated styrene butadiene latex, sulfur powder, accelerator and stabilizer, and the viscosity is adjusted to 2500 mpa.s to obtain a nitrile emulsion.

[0053] Performance Testing 1. The elongation at break and tensile strength of the nitrile gloves prepared in Examples 1-10 and Comparative Examples 1-3 were measured with reference to the standard GB / T13022-1991 "Test method for tensile properties of plastic films".

[0054] 2. The oil resistance of the nitrile gloves prepared in Examples 1-10 and Comparative Examples 1-3 was measured with reference to standard JIS K6250. A square sample with a side length of 50±1 mm was taken from an unused disposable glove. The sample was immersed in various oils for 22±0.25 h at an immersion temperature of 23±2° C. The surface area change rate (%) of the sample before and after the test was compared. The smaller the surface area change rate value, the better the oil resistance.

[0055] 3. The nitrile gloves prepared in Examples 1-10 and Comparative Examples 1-3 were immersed in 20% NaOH or 0.2 mol / L HCl solution for 5 h or 10 h, and the corrosion conditions were observed and recorded.

[0056] 4. The nitrile gloves prepared in Examples 1-10 and Comparative Examples 1-3 were sliced ​​and the slice thickness (mm) was measured.

[0057] 5. The nitrile gloves prepared in Example 6 were burned, and the residues after burning were collected for FTIR measurement to obtain an FTIR spectrum, as shown in FIG. Figure 1 .

[0058] The measurement results are shown in Tables 2 and 3.

[0059] Table 2 Table 3 By analyzing the data in Table 2 and Table 3, it can be seen that the nitrile gloves prepared in Examples 1, 6, 8 and 9 of the present application have good acid resistance, alkali resistance and oil resistance. At the same time, when the thickness of the gloves is controlled at 0.05 mm, the elongation at break and tensile strength of the gloves are relatively high, and have good mechanical properties.

[0060] Through Figure 1 By analyzing the characteristic peaks in the residue, it can be found that the chemical bonds in the residue are mainly hydroxyl, carbonyl and ether bonds. It can be seen that the nitrile gloves prepared in the present application do not add any halogen or other elements harmful to the environment and human body, and are safe and environmentally friendly.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An acid, alkali and oil resistant ultra-thin nitrile glove, characterized in that: Prepared from nitrile emulsion; the nitrile emulsion comprises the following raw materials in parts by weight: 80-140 parts of carboxylated nitrile latex, 5-12 parts of hydrogenated styrene butadiene latex, 1.5-3 parts of sulfur powder, 3-6 parts of hyperbranched resin, 1-2 parts of nano silver, 0.5-2.5 parts of zinc oxide, 2-3 parts of thickener, 1-3 parts of accelerator, 1-2 parts of stabilizer, and 40-60 parts of water.

2. The acid, alkali and oil resistant ultra-thin nitrile gloves according to claim 1, characterized in that: The preparation method of hydrogenated styrene butadiene latex comprises the following steps: adding styrene butadiene latex into a reaction container, heating to 55-60° C., adding hydrazine hydrate, stirring, adding boric acid, and simultaneously dripping hydrogen peroxide at a constant speed, reacting at a constant temperature for 2-3 hours after the dripping is completed, taking out the latex for demulsification, washing, and drying to obtain a hydrogenated styrene butadiene latex sample.

3. The acid, alkali and oil resistant ultra-thin nitrile gloves according to claim 1, characterized in that: The hyperbranched resin includes one or more of hyperbranched polyester, hyperbranched polyamide, hyperbranched polyesteramide, hyperbranched polyimide ester or hyperbranched polysiloxane, and the branching degree of the hyperbranched resin is 0.3-0.

6.

4. The acid, alkali and oil resistant ultra-thin nitrile gloves according to claim 1, characterized in that: The accelerator is selected from one or more of sodium dibutyl dithiocarbamate, zinc diethyl dithiocarbamate, zinc dimethyl dithiocarbamate, zinc dibutyl dithiocarbamate or dibenzothiazole disulfide.

5. The acid, alkali and oil resistant ultra-thin nitrile gloves according to claim 1, characterized in that: The raw materials of the nitrile emulsion also include 1-2 parts of a surfactant, and the surfactant is selected from one or more of sodium dibutylnaphthalene sulfonate, sodium dodecylbenzene sulfonate and sodium fatty alcohol polyoxyethylene ether sulfate.

6. The acid, alkali and oil resistant ultra-thin nitrile gloves according to claim 1, characterized in that: The preparation method of the nitrile emulsion comprises the following steps: mixing nano silver, zinc oxide, hyperbranched resin, thickener and water, grinding and stirring to obtain a mixed slurry; mixing the mixed slurry with the remaining raw materials and stirring, adjusting the viscosity to 1500-4000 mpa.s to obtain the nitrile emulsion.

7. The acid, alkali and oil resistant ultra-thin nitrile gloves according to claim 6, characterized in that: The particle size of the powder in the mixed slurry is less than or equal to 3 um.

8. A method for preparing the acid, alkali and oil resistant ultra-thin nitrile gloves according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Immerse the cleaned hand model in hot water for preheating, then immerse it in a tank containing a coagulant, control the temperature to 60-70°C, immerse, and dry; S2, dipping the impregnated hand model into nitrile emulsion for dipping, drying and shaping to form an adhesive film, and curling and trimming the adhesive film for standby use; S3, subjecting the film treated in step S2 to hot water leaching, controlling the temperature to 50-55° C., and then vulcanizing, and cooling after the vulcanization is completed; S4, washing the film treated in step S3 with chlorine, alkali and water in sequence, drying, removing the film from the hand mold, and obtaining acid-, alkali- and oil-resistant ultra-thin nitrile gloves.

9. The method for preparing the acid-, alkali- and oil-resistant ultra-thin nitrile gloves according to claim 8, characterized in that: The coagulant comprises the following raw materials in parts by weight: 8-15 parts of calcium nitrate, 3-6 parts of chitosan, 0.5-1 part of sodium lignin sulfonate and 70-100 parts of water.

10. The method for preparing the acid, alkali and oil resistant ultra-thin nitrile gloves according to claim 8, characterized in that: In step S3, the vulcanization process is divided into low-temperature vulcanization and high-temperature vulcanization. In the low-temperature vulcanization process, the vulcanization temperature is 60-80°C and the vulcanization time is 20-50 minutes; in the high-temperature vulcanization process, the vulcanization temperature is 90-110°C and the vulcanization time is 40-70 minutes.

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