Antistatic polyisoprene rubber anesthesia air storage bag

Abstract

The invention discloses an antistatic polyisoprene rubber anesthesia air storage bag, and relates to the technical field of anesthesia air storage bags. The antistatic polyisoprene rubber anesthesia air storage bag is prepared from the following raw materials in parts by weight: 100 parts of polyisoprene latex, 0.5 to 2 parts of a stabilizer, 1 to 2 parts of a sodium p-styrenesulfonate aqueous solution, 3 to 6 parts of nano silicon dioxide suspension dispersion liquid, 1 to 2 parts of an anti-aging agent, 0.8 to 2 parts of conductive graphite and 3 to 6 parts of a vulcanization bag, the anti-aging agent is prepared by the following steps: reacting 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid with glycerol 1-oleyl ether-d5 to generate an esterification product, epoxidizing the esterification product with hydrogen peroxide and formic acid, and reacting the epoxidized product with N-phenyl-1, 3-phenylenediamine, and has excellent migration resistance. By adding the anti-aging agent into the polyisoprene rubber, the anti-aging capability of the anesthesia air storage bag is improved.

Description

Technical Field

[0001] The invention relates to the technical field of anesthesia air storage bags, and in particular to an antistatic polyisoprene rubber anesthesia air storage bag. Background Art

[0002] The anesthesia gas storage bag is a component used to store gas in the breathing system of the anesthesia machine. It consists of a gas bag and a connector. Its main function is to adjust the gas supply. When the gas supply is more than the gas required by the system, it will temporarily store the excess gas; and when the gas supply is insufficient, it will release the stored gas for replenishment.

[0003] Anesthesia airbags are divided into non-antistatic anesthesia airbags and antistatic (conductive) anesthesia airbags according to their conductivity. The international standard for anesthesia airbags is ISO5362-2006, and there is a corresponding national standard YY / T0978-2016. The standard not only requires the structural design and various performance indicators of the product, but also has clear requirements for materials and safety, testing and detection methods. Generally speaking, anesthesia airbags need to have good elasticity and durability to ensure that they can effectively store and release gas during use.

[0004] A Chinese invention patent application with publication number CN118165385A discloses a polyisoprene rubber anesthesia air storage bag. The anesthesia air storage bag prepared by the polyisoprene rubber anesthesia air storage bag has good mechanical properties and antistatic properties, but insufficient migration resistance. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide an antistatic polyisoprene rubber anesthesia air storage bag.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions: An antistatic polyisoprene rubber anesthesia air storage bag comprises the following raw materials in parts by weight: Polyisoprene latex: 100 parts; Stabilizer: 0.5-2 parts; Sodium p-styrene sulfonate aqueous solution: 1-2 parts; Nano-silicon dioxide suspension dispersion: 3-6 parts; Anti-aging agent: 1-2 parts; Conductive graphite: 0.8-2 parts; Curing package: 3-6 parts; Wherein: the vulcanization package includes the following raw materials in parts by weight: sulfur: 5-10 parts; zinc oxide: 4-8 parts; accelerator: 5-10 parts; antioxidant 1010: 5-8 parts; peregal O-20: 3-6 parts; The antioxidant is firstly prepared by reacting 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid and glycerol 1-oleyl ether-d5 to generate an esterification product, which is then epoxidized with hydrogen peroxide and formic acid and then reacted with N-phenyl-1,3-phenylenediamine. The antioxidant is prepared by the following method: S1: 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1-oleyl glycerol-d5, p-toluenesulfonic acid and toluene are placed in a reaction bottle in sequence, stirred, heated to 110-120°C, and the generated water is removed by a water separator until no water is generated, reacted for 6-8h, cooled to room temperature, and post-treated to obtain intermediate 1; the reaction equation is shown as follows: ; S2: DMF, intermediate 1 and strong acid cation exchange resin are added to the reactor, stirred, and heated to 60-80°C; then formic acid and 30wt% H2O2 are mixed, and slowly dripped into the reaction bottle, and the reaction is completed for 6-8h, and the intermediate 2 is obtained after post-treatment; the reaction equation is shown as follows: ; S3: Place intermediate 2, N-phenyl-1,3-phenylenediamine, triethylamine and tetrahydrofuran into a reaction bottle in sequence, stir, raise the temperature to 70-75°C for reaction for 9-10 hours, cool to room temperature, and post-treat to obtain an antioxidant; the reaction equation is as follows: ; It should be noted that the above reaction equation is only a schematic diagram, used to represent the direct reaction of functional groups.

[0007] In the step S1, the molar ratio of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1-oleyl glycerol-d5, and p-toluenesulfonic acid is 2:(1.1-1.5):0.05.

[0008] In the step S2, the mass ratio of the intermediate 1, the strong acid cation exchange resin, the formic acid and the 30 wt % H 2 O 2 is 10:(0.5-2):(1.5-3):(6-8).

[0009] In the step S3, the molar ratio of the intermediate 2, N-phenyl-1,3-phenylenediamine and triethylamine is 1:(1.2-1.5):(1-2).

[0010] The sulfur, zinc oxide, accelerator, antioxidant and conductive graphite are all in the form of a water dispersion with a total solid content of 50 wt %. The water dispersion is ground with a nano-abrasive machine until the dispersion D90 is no more than 3 microns, and 0.2-0.8 wt % of disodium methylene dinaphthalene sulfonate is added to the ground water dispersion as a surfactant.

[0011] Due to the adoption of the above technical solution, the beneficial effects of the present invention include: (1) The antioxidant in the present invention improves the anti-aging ability through the combined action of hindered phenol and aromatic amine. After adding the antioxidant to the polyisoprene rubber anesthesia air storage bag, the anti-aging performance and migration resistance of the antistatic polyisoprene rubber anesthesia air storage bag are improved.

[0012] (2) The antistatic polyisoprene rubber anesthesia air storage bag provided by the present invention has physical properties that meet the requirements of YY / T0978-2016 standard, and the product conductivity meets the requirements of 39.3b in GB9706.1-2007. The product resistance value is less than 1MΩ, and it has excellent anti-aging performance, and can replace natural latex antistatic anesthesia air storage bags. DETAILED DESCRIPTION

[0013] The invention will be further described below in conjunction with the embodiments, but the invention is not limited to these embodiments.

[0014] Example 1 Preparation of antioxidant: S1: 1000 ml of toluene, 2 mol of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1.1 mol of glycerol 1-oleyl ether-d5, and 0.05 mol of p-toluenesulfonic acid were placed in a reaction bottle in sequence, stirred, heated to 110°C, reacted for 8 h (the generated water was removed by a water separator during the reaction), cooled to room temperature, and distilled under reduced pressure at 70°C for 3 h to remove toluene. The residue was dissolved in 500 ml of ethyl acetate, washed with 120 mL of 5 wt% NaHCO3 solution and 120 ml of saturated brine in sequence, and rotary evaporated at 60°C for 2 h to obtain intermediate 1; S2: 1000ml DMF, 300g intermediate 1 and 15g strong acid cation exchange resin were added into the reactor, stirred and heated to 70℃; then 45g formic acid and 180g 30wt% H2O2 were mixed and slowly dripped into the reaction bottle. After the dripping was completed (30min), the reaction was continued for 6h, then cooled to room temperature, and distilled under reduced pressure at 70℃ for 2.5h. The residue was dissolved in 500ml ethyl acetate, washed with deionized water (200ml×3 times), and distilled under reduced pressure at 70℃ for 2h to obtain intermediate 2; S3: Under nitrogen protection, 1200 ml tetrahydrofuran, 1 mol intermediate 2, 1.2 mol N-phenyl-1,3-phenylenediamine and 1 mol triethylamine were placed in a reaction bottle in sequence, stirred, heated to 70 °C for reaction for 10 h, cooled to room temperature, washed with deionized water (200 ml × 3 times), distilled at 70 °C under reduced pressure for 3 h to remove tetrahydrofuran, and dried at 70 °C for 10 h to obtain an antioxidant.

[0015] Example 2 Preparation of antioxidant: S1: 1000 ml of toluene, 2 mol of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1.4 mol of glycerol 1-oleyl ether-d5, and 0.08 mol of p-toluenesulfonic acid were placed in a reaction bottle in sequence, stirred, heated to 115°C, reacted for 7 h (the generated water was removed by a water separator during the reaction), cooled to room temperature, and distilled under reduced pressure at 70°C for 3 h to remove toluene. The residue was dissolved in 500 ml of ethyl acetate, washed with 120 mL of 5 wt% NaHCO3 solution and 120 ml of saturated brine in sequence, and rotary evaporated at 60°C for 2 h to obtain intermediate 1; S2: 1000ml DMF, 300g intermediate 1 and 45g strong acid cation exchange resin were added into the reactor, stirred and heated to 80℃; then 75g formic acid and 210g 30wt% H2O2 were mixed evenly and slowly dripped into the reaction bottle. After the dripping was completed (30min), the reaction was continued for 7h, then cooled to room temperature, and distilled under reduced pressure at 70℃ for 2.5h. The residue was dissolved in 500ml ethyl acetate, washed with deionized water (200ml×3 times), and distilled under reduced pressure at 70℃ for 2h to obtain intermediate 2; S3: Under nitrogen protection, 1200 ml tetrahydrofuran, 1 mol intermediate 2, 1.4 mol N-phenyl-1,3-phenylenediamine and 1.6 mol triethylamine were placed in a reaction bottle in sequence, stirred, heated to 70 °C for reaction for 10 h, cooled to room temperature, washed with deionized water (200 ml × 3 times), distilled at 70 °C under reduced pressure for 3 h to remove tetrahydrofuran, and dried at 70 °C for 10 h to obtain an antioxidant.

[0016] Example 3 Preparation of antioxidant: S1: 1000 ml of toluene, 2 mol of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1.5 mol of glycerol 1-oleyl ether-d5, and 0.05 mol of p-toluenesulfonic acid were placed in a reaction bottle in sequence, stirred, heated to 120°C, reacted for 6 h (the generated water was removed by a water separator during the reaction), cooled to room temperature, and distilled under reduced pressure at 70°C for 3 h to remove toluene. The residue was dissolved in 500 ml of ethyl acetate, washed with 120 mL of 5 wt% NaHCO3 solution and 120 ml of saturated brine in sequence, and rotary evaporated at 60°C for 2 h to obtain intermediate 1; S2: 1000ml DMF, 300g intermediate 1 and 60g strong acid cation exchange resin were added into the reactor, stirred and heated to 80℃; then 90g formic acid and 240g 30wt% H2O2 were mixed and slowly dripped into the reaction bottle. After the dripping was completed (30min), the reaction was continued for 8h, then cooled to room temperature, and distilled under reduced pressure at 70℃ for 2.5h. The residue was dissolved in 500ml ethyl acetate, washed with deionized water (200ml×3 times), and distilled under reduced pressure at 70℃ for 2h to obtain intermediate 2; S3: Under nitrogen protection, 1200 ml of tetrahydrofuran, 1 mol of intermediate 2, 1.5 mol of N-phenyl-1,3-phenylenediamine and 2 mol of triethylamine were placed in a reaction bottle in sequence, stirred, heated to 75 °C for reaction for 9 h, cooled to room temperature, washed with deionized water (200 ml × 3 times), distilled at 70 °C under reduced pressure for 3 h to remove tetrahydrofuran, and dried at 70 °C for 10 h to obtain an antioxidant.

[0017] Example 4

[0018] An antistatic polyisoprene rubber anesthesia air storage bag is composed of the following raw materials in parts by weight: Polyisoprene latex: 100 parts, stabilizer (10wt% potassium hydroxide aqueous solution): 2 parts, sodium p-styrene sulfonate aqueous solution (25wt%): 1 part, nano-silicon dioxide suspension dispersion: 3 parts, antioxidant (prepared in Example 1): 1 part, conductive graphite: 0.8 parts, vulcanization package: 3 parts; Wherein: the vulcanization package includes the following raw materials in parts by weight: sulfur: 5 parts; zinc oxide: 4 parts; accelerator (accelerator TMTD): 5 parts; antioxidant 1010: 5 parts; peregal O-20: 3 parts.

[0019] Among the above raw materials, sulfur, zinc oxide, accelerator, antioxidant 1010, and conductive graphite are all in the form of aqueous dispersions with a total solid content of 50 wt %; the aqueous dispersions are all ground with a nano-abrasive mill until the dispersion D90 is no greater than 3 microns, and 0.4 wt % of disodium methylene dinaphthalene sulfonate is added to the ground aqueous dispersions as a surfactant.

[0020] Example 5

[0021] An antistatic polyisoprene rubber anesthesia air storage bag is composed of the following raw materials in parts by weight: Polyisoprene latex: 100 parts, stabilizer (20wt% potassium hydroxide aqueous solution): 1 part, sodium p-styrene sulfonate aqueous solution (25wt%): 1.5 parts, nano-silicon dioxide suspension dispersion: 4.5 parts, antioxidant (prepared in Example 2): 1.5 parts, conductive graphite: 1.2 parts, vulcanization package: 4.5 parts; Wherein: the vulcanization package includes the following raw materials in parts by weight: sulfur: 8 parts; zinc oxide: 6 parts; accelerator (accelerator BZ): 8 parts; antioxidant 1010: 6 parts; peregal O-20: 4.5 parts.

[0022] Among the above raw materials, sulfur, zinc oxide, accelerator, antioxidant 1010, and conductive graphite are all in the form of aqueous dispersions with a total solid content of 50 wt %; the aqueous dispersions are all ground with a nano-abrasive mill until the dispersion D90 is no greater than 3 microns, and 0.6 wt % of disodium methylene dinaphthalene sulfonate is added to the ground aqueous dispersions as a surfactant.

[0023] Example 6

[0024] An antistatic polyisoprene rubber anesthesia air storage bag is composed of the following raw materials in parts by weight: Polyisoprene latex: 100 parts, stabilizer (25wt% potassium hydroxide aqueous solution): 0.5 parts, sodium p-styrene sulfonate aqueous solution (30wt%): 2 parts, nano-silicon dioxide suspension dispersion: 6 parts, antioxidant (prepared in Example 3): 2 parts, conductive graphite: 2 parts, vulcanization package: 6 parts; Wherein: the vulcanization package includes the following raw materials in parts by weight: sulfur: 10 parts; zinc oxide: 8 parts; accelerator (accelerator BZ): 10 parts; antioxidant 1010: 8 parts; peregal O-20: 6 parts.

[0025] Among the above raw materials, sulfur, zinc oxide, accelerator, antioxidant 1010, and conductive graphite are all in the form of aqueous dispersions with a total solid content of 50 wt %; the aqueous dispersions are all ground with a nano-abrasive mill until the dispersion D90 is no greater than 3 microns, and 0.8 wt % of disodium methylene dinaphthalene sulfonate is added to the ground aqueous dispersions as a surfactant.

[0026] Comparative Example 1 The raw material components and proportions of the anesthesia air storage bag are basically the same as those in Example 5, except that the antioxidant (prepared in Example 2) is replaced by a mixture of equal masses of N-phenyl-1,3-phenylenediamine and 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid in a mass ratio of 1:1.5.

[0027] Comparative Example 2 The raw material components and proportions of the anesthesia air storage bag are basically the same as those of Example 5, except that the antioxidant (prepared in Example 2) is replaced with an antioxidant prepared in the following steps of equal mass: S1: 1000 ml of toluene, 2 mol of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1.4 mol of allyl glycerol ether, and 0.08 mol of p-toluenesulfonic acid were placed in a reaction bottle in sequence, stirred, heated to 115°C, reacted for 7 h (the generated water was removed by a water separator during the reaction), cooled to room temperature, and distilled under reduced pressure at 70°C for 3 h to remove toluene. The residue was dissolved in 500 ml of ethyl acetate, washed with 120 mL of 5 wt% NaHCO3 solution and 120 ml of saturated brine in sequence, and rotary evaporated at 60°C for 2 h to obtain intermediate 1; S2: 1000ml DMF, 300g intermediate 1 and 45g strong acid cation exchange resin were added into the reactor, stirred and heated to 80℃; then 75g formic acid and 210g 30wt% H2O2 were mixed evenly and slowly dripped into the reaction bottle. After the dripping was completed (30min), the reaction was continued for 7h, then cooled to room temperature, and distilled under reduced pressure at 70℃ for 2.5h. The residue was dissolved in 500ml ethyl acetate, washed with deionized water (200ml×3 times), and distilled under reduced pressure at 70℃ for 2h to obtain intermediate 2; S3: Under nitrogen protection, 1200 ml tetrahydrofuran, 1 mol intermediate 2, 1.4 mol N-phenyl-1,3-phenylenediamine and 1.6 mol triethylamine were placed in a reaction bottle in sequence, stirred, heated to 70 °C for reaction for 10 h, cooled to room temperature, washed with deionized water (200 ml × 3 times), distilled at 70 °C under reduced pressure for 3 h to remove tetrahydrofuran, and dried at 70 °C for 10 h to obtain an antioxidant.

[0028] Comparative Example 3 The raw material components and proportions of the anesthesia air storage bag are basically the same as those of Example 5, except that the antioxidant (prepared in Example 2) is replaced with an antioxidant prepared in the following steps of equal mass: S1: 1000 ml of toluene, 2 mol of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1.4 mol of 3-(2-allylphenoxy)propane-1,2-diol, and 0.08 mol of p-toluenesulfonic acid were placed in a reaction bottle in sequence, stirred, heated to 115°C, reacted for 7 h (the generated water was removed by a water separator during the reaction), cooled to room temperature, and distilled under reduced pressure at 70°C for 3 h to remove toluene. The residue was dissolved in 500 ml of ethyl acetate, washed with 120 mL of 5 wt% NaHCO3 solution and 120 ml of saturated brine in sequence, and rotary evaporated at 60°C for 2 h to obtain intermediate 1; S2: 1000ml DMF, 300g intermediate 1 and 45g strong acid cation exchange resin were added into the reactor, stirred and heated to 80℃; then 75g formic acid and 210g 30wt% H2O2 were mixed and slowly dripped into the reaction bottle. After 7h of reaction, the mixture was cooled to room temperature and distilled under reduced pressure at 70℃ for 2.5h. The residue was dissolved in 500ml ethyl acetate, washed with deionized water (200ml×3 times), and distilled under reduced pressure at 70℃ for 2h to obtain intermediate 2; S3: Under nitrogen protection, 1200 ml tetrahydrofuran, 1 mol intermediate 2, 1.4 mol N-phenyl-1,3-phenylenediamine and 1.6 mol triethylamine were placed in a reaction bottle in sequence, stirred, heated to 70 °C for reaction for 10 h, cooled to room temperature, washed with deionized water (200 ml × 3 times), distilled at 70 °C under reduced pressure for 3 h to remove tetrahydrofuran, and dried at 70 °C for 10 h to obtain an antioxidant.

[0029] Comparative Example 4 The raw material components and proportions of the anesthesia air storage bag are basically the same as those of Example 5, except that the antioxidant (prepared in Example 2) is replaced with an equal mass of a modified antioxidant prepared in the following steps: 1000 ml of toluene, 2 mol of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1.4 mol of glycerol 1-oleyl ether-d5 and 0.08 mol of p-toluenesulfonic acid were placed in a reaction bottle in sequence, stirred, heated to 115°C, reacted for 7 h (the generated water was removed by a water separator during the reaction), cooled to room temperature, and toluene was removed by reduced pressure distillation at 70°C for 3 h. The residue was dissolved in 500 ml of ethyl acetate, washed with 120 mL of 5 wt% NaHCO3 solution and 120 ml of saturated brine in sequence, and rotary evaporated at 60°C for 2 h to obtain intermediate 1.

[0030] Comparative Example 5 The raw material components and proportions of the anesthesia air storage bag are basically the same as those of Example 5, except that the antioxidant (prepared in Example 2) is replaced with a modified antioxidant of equal mass prepared in Example 2 of the Chinese invention patent with publication number CN118165385A.

[0031] The anesthesia air storage bags of Examples 4-6 and Comparative Examples 1-5 were prepared by the following process: S1: Stir and mix polyisoprene latex, stabilizer, sodium p-styrene sulfonate aqueous solution, nano-silicon dioxide suspension dispersion, antioxidant, conductive graphite, and vulcanization bag, keep warm and stir at 45° C., pre-vulcanize for 1.5 hours, and then stand at room temperature for 48 hours to obtain mature polyisoprene latex; S2: Clean the mold and dry it at 80°C for 5 minutes; S3: dipping in a coagulant (a 20 wt% calcium nitrate aqueous solution), drying the coagulant at 90°C for 5 minutes; S4: soaking the matured polyisoprene latex and drying the latex at 80° C. for 5 minutes; S5: leaching at 60±5℃, curling treatment; S6: Dry and vulcanize the latex after curling at 110°C for 25 minutes; S7: demoulding, washing with hot water at 60°C, leaching and post-processing to obtain an airbag.

[0032] The raw materials used in the examples and comparative examples of the present application are as follows: the nano-silicon dioxide suspension dispersion is SS-S10WJ type produced by Hangzhou Jikang New Materials Co., Ltd., the silicon dioxide particle size is 8-15nm, and the concentration is 30wt%; the polyisoprene latex is IR-550 polyisoprene latex produced by Puyang Lin's Chemical New Materials Co., Ltd., and the solid content is 50wt%; the sulfur is S-80 type special sulfur powder produced by Qingdao Luchuan Chemical Co., Ltd., with a mesh number of 400 mesh; the conductive graphite is 1000 mesh graphite powder produced by Qingdao Dongkai Graphite Co., Ltd.

[0033] The anesthesia air storage bags of Examples 4-6 and Comparative Examples 1-5 of the present application were subjected to performance tests in accordance with YY / T0978-2016 and ASTM D412-16 (2021), and resistance tests were performed in accordance with requirement 39.3b of GB9706.1-2007. The test results are shown in Table 1.

[0034] Aging test: The anesthesia air storage bags of Examples 4-6 and Comparative Examples 1-5 of the present application were placed in a hot air aging box and aged at 100° C. for 5 days, and then relevant performance tests were performed. The test results are shown in Table 1.

[0035] Migration resistance aging test: The anesthesia air storage bags of Examples 4-6 and Comparative Examples 1-5 of the present application were placed in methanol, immersed in a static state at a constant temperature of 70°C for 48 hours, taken out and blown dry with methanol, and aged at 100°C in a hot air aging box for 5 days before conducting relevant performance tests. The test results are shown in Table 1.

[0036] Table 1 Airbag mechanical properties and resistance test data

[0037] It can be seen from Examples 4, 5 and 6 in Table 1 that the anesthesia air storage bag of the present invention has excellent mechanical properties (test piece tensile strength, test piece elongation at break), antistatic properties (resistance value) and migration resistance (migration resistance aging test).

[0038] Comparative Example 1 is different from Example 5 in that an equal mass of N-phenyl-1,3-phenylenediamine and 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid is used to prepare the air storage bag in a mass ratio of 1:1.5. It can be seen from the data in Table 1 that the tensile strength of the test piece after aging is 13.7 MPa, and the tensile strength of the test piece after migration resistance aging is 9.8 MPa. Its migration resistance and anti-aging ability are poorer than those of Examples 4-6. The possible reason is that the molecular weight of N-phenyl-1,3-phenylenediamine and 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid is small, the diffusion resistance is low, and the migration resistance is poor, resulting in the loss of antioxidant, so that its anti-aging performance is poor.

[0039] Comparative Examples 2 and 3 are air storage bags prepared by using allyl glycerol ether and 3-(2-allylphenoxy)propane-1,2-diol instead of glycerol 1-oleyl ether-d5 synthetic antioxidant. It can be seen from the data in Table 1 that the tensile strength of the test pieces after aging is 15.2 and 15.6 MPa, respectively, and the elongation at break of the test pieces is 368 and 436%, respectively. Its migration and aging resistance is poorer than that of Examples 4-6. The reason may be that allyl glycerol ether and 3-(2-allylphenoxy)propane-1,2-diol alkyl chains have better compatibility with the rubber matrix than 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid with a long chain structure, so that the antioxidant is evenly dispersed in the material, which can reduce the problem of excessive local concentration or precipitation; the alkyl chain can form steric hindrance through its volume effect, protect the active groups (such as phenolic hydroxyl or amine groups) in the antioxidant molecules from free radical attack, and delay its own oxidation failure.

[0040] Comparative Example 4 is an air storage bag prepared by using the intermediate 1 of Example 2 as an antioxidant. It can be seen from the data in Table 1 that the tensile strength of the air storage bag of Comparative Example 4 after aging is 14.3MPa, and the elongation at break of the test piece is lower than 479%. Its migration resistance and anti-aging performance are obviously inferior to those of the anesthesia air storage bags of Examples 4-6. The main reason is that the NH structure in N-phenyl-1,3-phenylenediamine is lacking to inhibit the chain reaction process, resulting in poor anti-aging ability.

[0041] Comparative Example 5 is an air storage bag prepared by using the modified antioxidant prepared in Example 2 of the Chinese invention patent with publication number CN118165385A. It can be seen from the data in Table 1 that the tensile strength of the air storage bag of Comparative Example 5 after migration aging resistance test piece is 12.8MPa, and its migration aging resistance performance is obviously inferior to the anesthesia air storage bags of Examples 4-6. The main reason may be that the molecular weight is small, resulting in poor migration resistance.

[0042] In summary, it can be seen from the data of the comparative examples and embodiments in Table 1 that the antistatic polyisoprene rubber anesthesia air storage bag prepared by the present invention has good migration resistance, excellent tensile strength and elongation at break, and still maintains relatively good tensile strength and elongation at break after aging. The reason why the polyisoprene rubber anesthesia air storage bag prepared by the present invention has excellent antioxidant and anti-aging effects is that the antioxidant prepared by the present invention introduces 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid and N-phenyl-1,3-phenylenediamine into glycerol 1-oleyl ether-d5, which increases the molecular weight of the antioxidant, improves the extraction resistance of the antioxidant, and reduces the loss of the antioxidant. Among them, the long-chain alkyl structure of 1-oleyl glycerol-d5 has good compatibility with rubber, which makes the antioxidant have good migration resistance. 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid provides a hindered phenol antioxidant with two hindered phenol units. The substituent groups on both sides of the -OH on the benzene ring can form a strong intermolecular force with the molecules in the matrix material, which can effectively limit the movement of the antioxidant molecules, thereby improving its migration resistance. The introduced N-phenyl-1,3-phenylenediamine functional group increases the conjugation effect of δ-π (N-benzene ring), and the hydrogen of NH falls off to form a free radical. The detached hydrogen will quickly react with the free radicals and peroxy radicals on the carbon chain of polyisoprene, making it lose its activity, thereby inhibiting the chain reaction and improving its anti-aging ability.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. However, any equivalent changes, modifications and evolutions made by ordinary technicians in the field without departing from the scope of the technical solution of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. An antistatic polyisoprene rubber anesthesia air storage bag, characterized in that: The invention comprises the following raw materials in parts by weight: Polyisoprene latex: 100 parts; Stabilizer: 0.5-2 parts; Sodium p-styrene sulfonate aqueous solution: 1-2 parts; Nano-silicon dioxide suspension dispersion: 3-6 parts; Anti-aging agent: 1-2 parts; Conductive graphite: 0.8-2 parts; Curing package: 3-6 parts; Wherein: the vulcanization package includes the following raw materials in parts by weight: sulfur: 5-10 parts; zinc oxide: 4-8 parts; accelerator: 5-10 parts; antioxidant 1010: 5-8 parts; peregal O-20: 3-6 parts; The antioxidant is firstly prepared by reacting 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid and glycerol 1-oleyl ether-d5 to generate an esterification product, which is then epoxidized with hydrogen peroxide and formic acid and then reacted with N-phenyl-1,3-phenylenediamine.

2. The antistatic polyisoprene rubber anesthesia air storage bag according to claim 1, characterized in that: The antioxidant is prepared by the following method: S1: Toluene, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1-oleyl glycerol-d5, and p-toluenesulfonic acid are placed in a reaction bottle in sequence, stirred, heated to 110-120°C, reacted for 6-8h, removed the generated water during the reaction, cooled to room temperature, and post-treated to obtain intermediate 1; S2: DMF, intermediate 1 and strong acid cation exchange resin are added into the reactor, stirred and heated to 60-80°C; then formic acid and 30wt% H2O2 are mixed evenly and slowly dripped into the reaction bottle, and the reaction is continued for 6-8h, and intermediate 2 is obtained after post-treatment; S3: Under nitrogen protection, tetrahydrofuran, intermediate 2, N-phenyl-1,3-phenylenediamine and triethylamine were placed in a reaction bottle in sequence, stirred, and the temperature was raised to 70-75°C for reaction for 9-10 hours, then cooled to room temperature, and post-treated to obtain an antioxidant.

3. The antistatic polyisoprene rubber anesthesia air storage bag according to claim 2, characterized in that: In step S1, the molar ratio of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 1-oleyl glycerol-d5, and p-toluenesulfonic acid is 2:(1.1-1.5):(0.05-0.1).

4. The antistatic polyisoprene rubber anesthesia air storage bag according to claim 2, characterized in that: In step S2, the mass ratio of intermediate 1, strong acid cation exchange resin, formic acid and 30wt% H2O2 is 10:(0.5-2):(1.5-3):(6-8).

5. The antistatic polyisoprene rubber anesthesia air storage bag according to claim 2, characterized in that: In step S3, the molar ratio of the intermediate 2, N-phenyl-1,3-phenylenediamine and triethylamine is 1:(1.2-1.5):(1-2).

6. The antistatic polyisoprene rubber anesthesia air storage bag according to claim 1, characterized in that: The stabilizer is a 10-25wt% potassium hydroxide aqueous solution.

7. The antistatic polyisoprene rubber anesthesia air storage bag according to claim 1, characterized in that: The accelerator is one of accelerator TMTD and accelerator BZ.

8. The antistatic polyisoprene rubber anesthesia air storage bag according to claim 1, characterized in that: The mass concentration of the sodium p-styrene sulfonate aqueous solution is 25-30wt%.

9. The antistatic polyisoprene rubber anesthesia air storage bag according to claim 1, characterized in that: The sulfur, zinc oxide, accelerator, antioxidant 1010 and conductive graphite are all in the form of a water dispersion with a total solid content of 50 wt %. The water dispersion is ground with a nano-abrasive machine until the dispersion D90 is no more than 3 microns, and 0.4-0.8 wt % of disodium methylene dinaphthalene sulfonate is added to the ground water dispersion as a surfactant.

Images