High-elasticity anti-collision material and preparation method thereof

Abstract

The application discloses a kind of high elasticity anti-collision materials and preparation method thereof, belong to high polymer material technical field, the high elasticity anti-collision material of the application is by weight fraction, including following components: raw rubber of silicone rubber 56~93 parts, antioxidant flexible crosslinking agent 3~6 parts, hydroxyl silicone oil 1~5 parts, catalyst 0.1~1.5 parts, inhibitor 0.1~0.5 parts, hydrogen-containing silicone oil 0.01~1 parts, fumed silica 15~40 parts, antibacterial agent 0.1~0.5 parts.The high elasticity anti-collision material prepared by the application has excellent elasticity, antioxidant property, bacteriostatic property by adding antioxidant flexible crosslinking agent, and can be used for anti-collision protection.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of high-molecular materials, in particular to a high-elasticity anti-collision material and a preparation method thereof. BACKGROUND

[0002] In daily life, the sharp frames of wood, metal and glass products such as window corners and table corners cannot be avoided, but they can easily cause children to be injured when running and playing, and thus have certain safety risks. Therefore, many businesses develop high-elasticity anti-collision materials to wrap the sharp parts to reduce the risk of head and body injury. Among them, silicone rubber is a typical high-elasticity material, and the flexible -Si-O-Si chain segment of the silicone rubber can absorb kinetic energy through deformation when being impacted, so as to reduce the transmission of impact force, thereby achieving the purpose of anti-collision protection. However, the current elastic silicone rubber material has problems such as insufficient elasticity and short anti-aging life, and must be replaced after a period of use, otherwise the protection effect will be lost. SUMMARY

[0003] In order to overcome the deficiencies of the prior art, the application provides a high-elasticity anti-collision material and a preparation method thereof. The high-elasticity anti-collision material is prepared by placing silicone rubber raw rubber, antioxidant flexible crosslinking agent, hydroxyl silicone oil, hydrogen-containing silicone oil, inhibitor, fumed white carbon black, catalyst and antibacterial agent in a vulcanizing machine. The flexible long-chain polytetrahydrofuran ether diol is introduced into the crosslinking agent to give the material high elasticity, so as to achieve the purpose of anti-collision protection. The triazine ring in the crosslinking agent can absorb free radicals in ultraviolet rays, thereby giving the material antioxidant property. In rainy days or humid environments, the antibacterial powder in the material degrades to release the antibacterial drug polyhexamethylene guanidine to inhibit the generation and growth of bacterial colonies.

[0004] The application aims to provide a high-elasticity anti-collision material and a preparation method thereof.

[0005] The application is implemented by the following technical scheme:

[0006] The high-elasticity anti-collision material comprises the following components in parts by weight: 56-93 parts of silicone rubber raw rubber, 3-6 parts of antioxidant flexible crosslinking agent, 1-5 parts of hydroxyl silicone oil, 0.1-1.5 parts of catalyst, 0.1-0.5 parts of inhibitor, 0.01-1 part of hydrogen-containing silicone oil, 15-40 parts of fumed white carbon black and 0.1-0.5 parts of antibacterial agent. The structure formula of the antioxidant flexible crosslinking agent is shown as formula 1:

[0007]

[0008] Preferably, the silicone rubber raw rubber is methyl vinyl silicone rubber MVQ110-0 and methyl vinyl silicone rubber MVQ110-3, and the mass ratio is 0.1-0.2.

[0009] Preferably, the inhibitor is ethynylcyclohexanol.

[0010] Preferably, the catalyst is a Karstedt's catalyst.

[0011] Preferably, the antibacterial agent is a polyhexamethylene guanidine antibacterial agent.

[0012] In a specific embodiment, the preparation of the antioxidant flexible crosslinker includes the following steps:

[0013] S1. Epoxidized polytetrahydrofuran ether glycol (EPTMEG):

[0014] Under a nitrogen atmosphere, polytetrahydrofuran ether glycol, epichlorohydrin, and a phase transfer catalyst are added to a reaction kettle, slowly warmed to 60°C; slowly add 20% NaOH solution, warm to 80°C and stir for 4-6 hours, then the reaction is complete; cool and stand to separate layers, wash the organic phase with deionized water until neutral, and distill under reduced pressure to obtain epoxidized polytetrahydrofuran ether glycol; preferably, the molecular weight of the polytetrahydrofuran ether glycol is 1000-3000 g / mol

[0015] S2. Antioxidant polytetrahydrofuran ether glycol (TTZ-PTMEG): EPTMEG is dissolved in anhydrous isopropyl alcohol, triethylamine is added, nitrogen is introduced, and antioxidant functional components are added in batches, the solution is stirred and dissolved at 70°C, and the reaction is carried out for 6 hours until the reaction solution becomes turbid; cool, filter, wash with ethanol, and vacuum dry to obtain the product antioxidant polytetrahydrofuran ether glycol;

[0016] S3. Silicon hydride siloxane prepolymer: TTZ-PTMEG and decamethyl dihydrogen pentasiloxane are dried in a vacuum drying oven at 80°C for 4 hours, then TTZ-PTMEG is dissolved in anhydrous toluene under a nitrogen atmosphere; the prepared solution is slowly added to decamethyl dihydrogen pentasiloxane, an alkali catalyst is added, the temperature is raised and the reaction is carried out for 4-6 hours until the reaction is complete; cool, add a small amount of acetic acid to neutralize the basic catalyst; distill under reduced pressure, precipitate with a mixed solvent, and dry to obtain the silicon hydride siloxane prepolymer;

[0017] S4. Alkenyl monosubstituted tetra-vinyl disiloxane polymer: under a nitrogen atmosphere, the prepolymer obtained in S3 and 1,3-dimethyl tetra-vinyl disiloxane are dried in a vacuum drying oven at 80°C for 4 hours and dissolved in anhydrous toluene; a catalyst and an inhibitor are added, the temperature is gradually raised, and the reaction is carried out for 2-3 hours until the reaction is complete; cool, add activated carbon, stir, and then filter; take the filtrate and distill under reduced pressure, then precipitate the polymer with a mixed solvent, filter, wash, and dry to obtain the alkenyl monosubstituted tetra-vinyl disiloxane polymer;

[0018] S5. Anti-oxidation flexible crosslinker terminated by alkenyl silicon hydrosiloxane: the polymer obtained in S4 and decamethyl dihydrogen pentasiloxane are dried in a vacuum oven at 80℃ for 4 hours under nitrogen atmosphere, and dissolved in anhydrous toluene; a catalyst and an inhibitor are added, and the reaction is carried out at gradually increasing temperature for 2-3 hours until the reaction is completed; after cooling to room temperature, a small amount of activated carbon is added to adsorb the residual platinum, and after stirring, the mixture is filtered; the filtrate is subjected to vacuum distillation, and then the polymer is precipitated using a mixed solvent, and after filtration, washing and drying, the anti-oxidation flexible crosslinker terminated by decamethyl dihydrogen pentasiloxane is obtained.

[0019] In a specific embodiment, in step S1, the amount of the epoxy bromopropane is 4-4.5 equivalents of the polytetrahydrofuran ether diol; the phase transfer catalyst is tetrabutylammonium bromide, and the amount is 0.83wt% of the amount of the raw material; the amount of NaOH is 1.5-2 equivalents of the polytetrahydrofuran ether diol;

[0020] In a specific embodiment, in step S2, the amount of the triethylamine is 0.3-0.65 equivalents of the epoxidized polytetrahydrofuran ether diol; the anti-oxidation functional component is 2,4-diamino-6-phenyl-1,3,5-triazine, and the amount is 2-2.1 equivalents of the epoxidized polytetrahydrofuran ether diol;

[0021] In a specific embodiment, in step S3, the amount of the decamethyl dihydrogen pentasiloxane is 2-2.1 equivalents of the anti-oxidation polytetrahydrofuran ether diol; the base catalyst is triethylamine, and the amount is 0.5-1wt%; the reaction temperature is 100-120℃; and the mixed solvent is n-hexane and ethanol, and the ratio used is 1:1-1:5.

[0022] In a specific embodiment, in step S4, the amount of the 1,3-dimethyl tetra-vinyl disiloxane is 2-2.1 equivalents; the amount of toluene is 10-20wt%; the catalyst is Karstedt platinum catalyst, and the amount is 1.5-5wt%; the inhibitor is ethynyl cyclohexanol, and the amount is 0.1-0.5wt%; the reaction temperature is 80-100℃; and the amount of activated carbon is 0.5-1wt%.

[0023] Another object of the present application is to protect a preparation method of a high-elasticity anti-collision material, which comprises the following steps:

[0024] S1. Under vacuum conditions, fumed silica is poured into a kneader, and then silicone rubber raw rubber is added, the air valve and exhaust valve of the kneader are closed, and mixing is carried out; during the mixing, hydroxyl silicone oil, anti-oxidation flexible crosslinker and inhibitor are sequentially added and mixed; the temperature is increased to 130℃, and mixing is carried out for 3 hours, and then vacuum mixing is carried out at 100℃ for 2 hours, and the mixing is completed; after cooling to room temperature, a silicone rubber masterbatch is prepared;

[0025] S2. To the mother rubber obtained in S1, a catalyst, a hydrogen-containing silicone oil and an antibacterial agent are added, and mixed thoroughly; then poured into a mold, and vulcanized in a flat vulcanizing machine under the conditions of 60-100 DEG C and 5 MPa for 15-30 min, and after edge wiping, a high-elasticity anti-collision material is obtained.

[0026] Advantages

[0027] The application provides a high-elasticity anti-collision material and a preparation method thereof, and the high-elasticity anti-collision material is prepared by placing silicone rubber raw rubber, an antioxidant flexible crosslinking agent, a hydroxyl silicone oil, a hydrogen-containing silicone oil, an inhibitor, fumed white carbon black, a catalyst and an antibacterial agent in a vulcanizing machine. The flexible long-chain polytetrahydrofuran ether diol is introduced into the crosslinking agent, when force is applied, the chain segments move, the collision kinetic energy is absorbed, the impact force transmission is reduced, and the material high elasticity is effectively improved, the purpose of anti-collision protection is achieved, the triazine ring in the crosslinking agent can absorb free radicals in ultraviolet rays, the performance does not decrease substantially after aging for one week, and the oxidation resistance of the material is greatly improved; the added antibacterial agent polyhexamethylene guanidine can inhibit the generation and growth of bacteria, and the generation of bacterial plaque or mold plaque is avoided when the material is placed in rainy days or a relatively humid environment for one month. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Synthetic path of the antioxidant flexible crosslinking agent;

[0029] Figure 2 Infrared spectrum of the antioxidant flexible crosslinking agent and intermediates in Example 1. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0031] In the embodiments, the experimental methods used are conventional methods without special instructions, and the materials, reagents and the like used are commercially available without special instructions.

[0032] The raw materials used in the examples and comparative examples are described as follows.

[0033] Flexible segment: polytetrahydrofuran ether diol (PTMEG), Mn 2000, industrial grade, purchased from Jining Huakai Resin Co., Ltd.

[0034] Epoxy bromopropane: 98%, product number E808995, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0035] Phase transfer catalyst: Tetrabutylammonium bromide (TBAB), 99%, Cat# T818796, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0036] Isopropyl alcohol (IPA): 99.5%, Cat# I811925, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0037] Decamethyltetrasiloxane: 98%, Cat# D829485, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0038] 1,3-Dimethyltetra-vinyl disiloxane: 95%, Cat# D965023, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0039] Base catalyst: Triethylamine (TEA), 99.5%, Cat# T818774, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0040] Antioxidant functional component: 2,4-Diamino-6-phenyl-1,3,5-triazine, 98%, Cat# D822864, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0041] Catalyst: Karstedt catalyst, Pt content 2%, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0042] Inhibitor: Ethynylcyclohexanol, Cat# E809391, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0043] Antibacterial agent: Polyhexamethylene guanidine (PHMB); powder, 98%, Cat# BD01919529, purchased from Shanghai Bide Pharmaceutical Technology Co., Ltd.

[0044] Methyl vinyl silicone rubber (MVQ110-0): Vinyl content 0.03-0.06%, purchased from Hesheng Silicone Co., Ltd.

[0045] Methyl vinyl silicone rubber (MVQ110-3): Vinyl content 0.19-0.24%, purchased from Hesheng Silicone Co., Ltd.

[0046] Fumed silica: Grade HP-200, purchased from Jiangxi Hongbai New Material Co., Ltd.

[0047] Hydroxyl silicone oil: Hydroxyl content 8 wt.%, purchased from Wuhan Jiyue Sheng Chemical Co., Ltd.

[0048] Hydrogen-containing silicone oil: Hydrogen content 1.2 wt.%, purchased from Shenzhen Senri Organic Silicon Material Co., Ltd.

[0049] Hexadecyltrimethoxysilane: 96%, product number H708896, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0050] Oil phase emulsifier: polylactic acid; product number P921577, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0051] Water phase emulsifier: polyvinyl alcohol; Mw9000-10000, product number 767382, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.

[0052] Epoxidized polytetrahydrofuran ether glycol (EPTMEG): self-made, the preparation method is as follows: under the condition of nitrogen atmosphere, polytetrahydrofuran ether glycol (1 equivalent), epoxy bromopropane (4.1 equivalent) and tetrabutylammonium bromide (0.83 wt%) are added into a reaction kettle, slowly heated to 60°C and stirred until completely dissolved; slowly drop 20% NaOH (2 equivalent) solution, heated to 80°C and stirred for 4-6 hours after reaction; cool and stand for stratification, wash the organic phase with deionized water until neutral, remove unreacted epoxy bromopropane by reduced pressure distillation, and obtain epoxidized polytetrahydrofuran ether glycol;

[0053] Antioxidant polytetrahydrofuran ether glycol (TTZ-PTMEG): self-made, the preparation method is as follows: EPTMEG (1 equivalent) is dissolved in anhydrous isopropyl alcohol, triethylamine (0.58 equivalent) is added, nitrogen is introduced, and antioxidant functional component 2,4-diamino-6-phenyl-1,3,5-triazine (2.05 equivalent) is added in batches, heated to 70°C and stirred to dissolve, and the reaction is carried out for 6 hours until the reaction solution becomes turbid; cool, filter, ethanol wash, and vacuum dry to obtain the product antioxidant polytetrahydrofuran ether glycol;

[0054] Antioxidant flexible crosslinking agent (TTZ-PTMEG-Si): self-made, the preparation method is as follows:

[0055] S1. Silicon hydride siloxane prepolymer:

[0056] TTZ-PTMEG (1 equivalent) and decamethyl dihydrogen pentasiloxane (2.02 equivalent) are dried in a vacuum drying oven at 80°C for 4 hours, and then TTZ-PTMEG is dissolved in anhydrous toluene (50 wt%) under nitrogen atmosphere; the prepared solution is slowly added to decamethyl dihydrogen pentasiloxane, and then 0.5 wt% of base catalyst triethylamine is added, and the reaction is carried out at 110°C for 4-6 hours; cool to room temperature, add a small amount of acetic acid to neutralize the basic catalyst; remove the solvent by reduced pressure distillation, and then use n-hexane / ethanol mixed solvent to precipitate the remaining material, remove unreacted monomers and impurities, and finally dry to obtain the silicon hydride siloxane prepolymer;

[0057] S2. Modified tetra-vinyl disiloxane

[0058] The prepolymer obtained in S1 (1 equivalent) and 1,3-dimethyltetra-vinyl disiloxane (2.05 equivalents) were dried in a vacuum oven at 80°C for 4 hours and dissolved in anhydrous toluene (15 wt%), nitrogen was bubbled through and stirred until dissolved; platinum catalyst (1.6 wt%) and inhibitor ethynylcyclohexanol 0.1 wt% were added, the temperature was gradually increased to 100°C and the reaction was allowed to proceed for 2-3 hours; the reaction was stopped when the temperature reached 100°C; the reaction mixture was cooled to room temperature, a small amount of activated carbon (0.5 wt%) was added to adsorb the residual platinum, and the mixture was stirred for 30 minutes and then filtered; the filtrate was subjected to vacuum distillation to remove the solvent, and then dissolved in n-hexane, the polymer was precipitated by slowly adding ethanol dropwise, filtered, and the filter cake was washed with ethanol to remove small molecules generated during the reaction, and finally dried to obtain an alkenyl monosubstituted tetra-vinyl disiloxane polymer;

[0059] S3. Preparation of antioxidant flexible crosslinker terminated with alkenyl silane hydride siloxane

[0060] The polymer obtained in S2 (1 equivalent) and decamethyl dihydrogen pentasiloxane (6.05 equivalents) were dried in a vacuum oven at 80°C for 4 hours and dissolved in anhydrous toluene (15 wt%), nitrogen was bubbled through and stirred until dissolved; platinum catalyst (1.6 wt%) and inhibitor ethynylcyclohexanol (0.1 wt%) were added, the temperature was gradually increased to 100°C and the reaction was allowed to proceed for 2-3 hours; the reaction was stopped when the temperature reached 100°C; the reaction mixture was cooled to room temperature, a small amount of activated carbon (0.5 wt%) was added to adsorb the residual platinum, and the mixture was stirred for 30 minutes and then filtered; the filtrate was subjected to vacuum distillation to remove the solvent, and then dissolved in n-hexane, the polymer was precipitated by slowly adding ethanol dropwise, filtered, and the filter cake was washed with ethanol to remove small molecules generated during the reaction, and finally dried to obtain an antioxidant flexible crosslinker terminated with decamethyl dihydrogen pentasiloxane.

[0061] Antioxidant crosslinker (TTZ-Si): self-made, the difference between the preparation method and the antioxidant flexible crosslinker is that the antioxidant functional component is not incorporated into the flexible chain segment polytetrahydrofuran ether diol.

[0062] The components used in the examples and comparative examples of the present application are commercially available unless otherwise specified, and the components used in each parallel experiment are the same.

[0063] Examples and comparative examples

[0064] A high-elasticity anti-collision material, the weight formula of which is shown in Table 1, is prepared as follows:

[0065] S1. Under vacuum conditions, the filler fumed silica was poured into a kneader, then two kinds of silicone rubber raw rubber MVQ110-0 and MVQ110-3 were slowly added, the air valve and exhaust valve of the kneader were closed and mixing was carried out; during the mixing, hydroxyl silicone oil, antioxidant flexible crosslinking agent and inhibitor were sequentially added, and fully stirred and mixed; the temperature was raised to 130℃ and mixed for 3 hours, then vacuum mixing was carried out at 100℃ for 2 hours, and the mixing was completed. After cooling to room temperature, the silicone rubber masterbatch was prepared;

[0066] S2. The catalyst, hydrogen-containing silicone oil and antibacterial agent were added to the masterbatch obtained in S1, and fully mixed and uniform; then poured into a mold, and vulcanized at 60℃ and 5MPa for 20min in a flat vulcanizing machine. After wiping the edges, a high elasticity anti-collision material was obtained.

[0067] Table 1: A high elasticity anti-collision material (parts by weight)

[0068]

[0069] The high elasticity anti-collision material prepared in the examples and comparative examples was tested for the following properties, and the results are shown in the accompanying figures, Table 2 and Table 3, respectively.

[0070] 1. Infrared spectrum: each intermediate and antioxidant flexible crosslinking agent was mixed with potassium bromide at a ratio of 1:50 to prepare a pressed tablet. This test used an Avatar 380 spectrometer, and the sample was pressed into a potassium bromide tablet. Before testing, the blank background was scanned, and then the pressed sample was tested. The scanning range was 500-4000cm -1 , and the results are shown in Figure 2 .

[0071] 2. Mechanical property test: a Shore hardness tester was used to test the hardness according to the national standard ISO 7619-1-2004; a universal testing machine was used to test the tensile strength and elongation at break according to the standards ISO 37-2005 and ISO 34-1-2004, respectively. The two ends of the silicone rubber sheet were clamped on the tensile testing machine, the tensile speed was set to 50mm / min, and the stress and strain curves during the process were recorded in real time until the silicone rubber sheet was broken.

[0072] 3. Compression set: cylindrical silicone rubber samples with a height of about 10cm (±0.3) mm were prepared according to GB / T 1683-2018 "Determination method of compression set of vulcanized rubber under constant deformation", the silicone rubber sample was installed in the clamp and the compression amount was 30%, the test conditions were temperature 90℃, humidity 90%, and after each selected interval, the silicone rubber sample was taken out and the clamp was released, and the height was measured after standing at room temperature for one hour and the measurement data was recorded.

[0073] 4. Anti-aging: Cut the silicone rubber sheet into 1 x 1 x 0.22 cm and put it into the UV aging test box, set the temperature to room temperature, humidity 55%, irradiate for a week, and measure the percentage of performance decline.

[0074] 5. Bacteriostatic performance: Cut the silicone rubber sheet into 1 x 1 x 0.22 cm and put it into a dry petri dish, expose it to a dark and humid environment for a month, and observe whether the silicone rubber sheet surface produces bacterial stains or mold to detect the bacteriostatic performance.

[0075] Table 2 Performance test results of high-elasticity anti-collision material

[0076]

[0077] Table 3 Compression set of high-elasticity anti-collision material

[0078]

[0079] From the attached Figure 2 It can be seen that in the spectrum of A, the peak value appears at 2980-2850 cm -1 , which belongs to the stretching vibration of CH2, the peak value appears at 1120 cm -1 , which belongs to the stretching vibration of C-O-C, the peak value appears at 910 cm -1 , which belongs to the characteristic absorption peak of oxirane, and no absorption peak belonging to -OH has been observed before 3000 cm -1 , which indicates that the oxirane in the polytetrahydrofuran ether diol has been successfully modified. In the spectrum of B, the peak value appears at 3502 cm -1 -3200 cm -1 , which belongs to the characteristic absorption signal of -OH and -NH2 on the triazine ring, the peak value appears at 1675-1500 cm -1 , which belongs to the C=N vibration on the triazine ring, and the disappearance of the epoxy peak indicates that the triazine ring successfully opened the epoxy group modification on the polytetrahydrofuran ether diol. In the spectrum of C, the peak value appears at 2300-2100 cm -1 , which belongs to the stretching vibration of Si-H on decamethyldihydrogen pentasiloxane, and the peak at 1255 cm -1 nearby is the stretching vibration of Si-C, indicating that decamethyldihydrogen pentasiloxane has been introduced on the triazine ring. In the spectrum of D, the absorption signal belonging to Si-H disappears, and a peak value of 1675 cm -1 belonging to C=C appears, indicating that Si-H reacts with the double bond. In the spectrum of E, the peak signal near 1675 cm -1 is weakened, and the Si-H signal reappears, and the characteristic groups of polytetrahydrofuran ether diol, triazine ring, and decamethyldihydrogen pentasiloxane are present, proving that the antioxidant flexible crosslinking agent has been successfully copolymerized.

[0080] As can be seen from Table 2, with the increase of the content of the antioxidant flexible crosslinking agent added, the hardness and tensile strength of the prepared high-elasticity anti-collision material gradually increase, while the elongation at break shows an opposite trend. Since there is a flexible chain segment polytetrahydrofuran ether glycol in the crosslinking agent, compared with the case where the crosslinking agent prepared in the application is replaced by the relatively rigid hydrogen-containing silicone oil in the entire comparative example 1, the hardness of examples 1-5 is smaller, i.e. more flexible, and the elongation at break is larger, indicating that it has good flexibility, and the chain segment can fully move to give the material good elasticity. At the same time, it can also be seen from the comparative examples and examples that the triazine ring gives the material good anti-aging performance, and the antibacterial agent can effectively deal with the bacterial growth caused by rain and humidity.

[0081] As can be seen from Table 3, after 9 days of testing, the compression set of the prepared high-elasticity anti-collision material is less than 0.25%, which is smaller than that of the comparative example, indicating that the crosslinking agent of the application can give the material good elasticity.

[0082] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the specification. The specification selects and describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their entire scope and equivalents.

Claims

1. A high-elasticity anti-collision material, comprising the following components in parts by weight: 56-93 parts of raw silicone rubber, 3-6 parts of an antioxidant flexible crosslinking agent, 1-5 parts of hydroxyl silicone oil, 0.1-1.5 parts of a catalyst, 0.1-0.5 parts of an inhibitor, 0.01-1 parts of hydrogen-containing silicone oil, 15-40 parts of fumed silica, and 0.1-0.5 parts of an antibacterial agent, wherein the antioxidant flexible crosslinking agent has a structural formula as shown in Formula 1. Formula 1, the structure of which is The segments are derived from polytetramethylene ether glycol having a molecular weight of 1000 to 3000 g / mol.

2. The high-elasticity impact-attenuating material of claim 1, wherein The antioxidant flexible crosslinking agent is prepared by the following steps: S1.in a nitrogen atmosphere, polytetrahydrofuran ether glycol, epoxy bromopropane and phase transfer catalyst are added to the reaction kettle, and slowly heated to 50-70 ℃;Dropwise add NaOH solution, heated to 70-90 ℃ stirring reaction 4-6 hours after the reaction is finished, separation and purification of epoxidized polytetrahydrofuran ether glycol; S2.dissolve the epoxidized polytetrahydrofuran ether glycol in anhydrous isopropyl alcohol, add triethylamine, nitrogen, and add anti-oxidation functional components in batches, heated to 60-80 ℃ stirring and dissolving, reaction 4-8 hours to the reaction liquid turbid;Separation and purification of the product antioxidant polytetrahydrofuran ether glycol; S3.the antioxidant polytetrahydrofuran ether glycol and decamethyl dihydrogen pentasiloxane are dried in advance, and then the antioxidant polytetrahydrofuran ether glycol is dissolved in anhydrous toluene under a nitrogen atmosphere;Then slowly drop into decamethyl dihydrogen pentasiloxane, add alkali catalyst, heated to 4-6 hours reaction;Separation and purification of the silicon hydrogen siloxane prepolymer; S4.under a nitrogen atmosphere, the prepolymer obtained in S3 and 1,3-dimethyl tetra vinyl disiloxane are dried and dissolved in anhydrous toluene;Add catalyst and inhibitor, gradually heated, reaction 2-3 hours reaction is finished;Separation and purification of the alkenyl monosubstituted tetra vinyl disiloxane polymer; S5.under a nitrogen atmosphere, the polymer obtained in S4 and decamethyl dihydrogen pentasiloxane are dried and dissolved in anhydrous toluene;Add catalyst and inhibitor, gradually heated, reaction 2-3 hours reaction is finished;Separation and purification of the alkenyl capped with decamethyl dihydrogen pentasiloxane antioxidant flexible crosslinking agent.

3. The high-elasticity impact-attenuating material of claim 2, wherein In step S1, the amount of epoxy bromopropane is 4-4.5 equivalents of polytetrahydrofuran ether glycol;The phase transfer catalyst is tetrabutylammonium bromide, and the amount is 0.83 wt% of the amount of raw materials;The amount of NaOH is 1.5-2 equivalents of polytetrahydrofuran ether glycol.

4. The high-elasticity impact-attenuating material of claim 2, wherein In step S2, the amount of triethylamine is 0.3-0.65 equivalents of epoxidized polytetrahydrofuran ether glycol;The antioxidant functional component is 2,4-diamino-6-phenyl-1,3,5-triazine, and the amount is 2-2.1 equivalents of epoxidized polytetrahydrofuran ether glycol.

5. The highly elastic impact-resistant material as described in claim 2, characterized in that, In step S3, the amount of decamethyl dihydrogen pentasiloxane is 2-2.1 equivalents of antioxidant polytetrahydrofuran ether glycol;The alkali catalyst is triethylamine, and the amount is 0.5-1 wt%;The reaction temperature is 100-120 ℃.

6. The high resilient impact absorbing material of claim 2, wherein The amount of 1,3-dimethyltetra-vinyl disiloxane in step S4 is 2-2.1 equivalents; the amount of toluene is 10-20 wt%; the catalyst is Karstedt platinum catalyst, and the amount is 1.5-5 wt%; the inhibitor is ethynylcyclohexanol, and the amount is 0.1-0.5 wt%; and the reaction temperature is 80-100 ℃.

7. The high resilient impact absorbing material of claim 1, wherein The silicone rubber raw rubber is methyl vinyl silicone rubber, the inhibitor is ethynylcyclohexanol, and the catalyst is Karstedt platinum catalyst; and the antibacterial agent is polyhexamethylene guanidine antibacterial agent.

8. A method for preparing a highly elastic impact-resistant material as described in any one of claims 1 to 7, characterized in that, The method comprises the following steps: S1. Under vacuum conditions, pour fumed silica into a kneader, then add silicone rubber raw rubber, close the air valve and exhaust valve of the kneader and perform mixing; sequentially add hydroxyl silicone oil, antioxidant flexible crosslinking agent and inhibitor during mixing, and mix uniformly; heat to 130 ℃ and mix for 3 hours, then perform vacuum mixing at 100 ℃ for 2 hours, and after cooling to room temperature, obtain silicone rubber masterbatch; S2. Add catalyst, hydrogen-containing silicone oil and antibacterial agent to the masterbatch obtained in S1, and mix sufficiently and uniformly; then pour into a mold, and perform vulcanization at 60-100 ℃ and 5 MPa for 15-30 min in a flat vulcanization machine, and after edge wiping, obtain high-elasticity anti-collision material.

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