Butyl rubber type thermoplastic vulcanized rubber as well as preparation method and application thereof

Abstract

The invention provides butyl rubber type thermoplastic vulcanized rubber as well as a preparation method and application thereof. The thermoplastic vulcanized rubber comprises the following components in parts by mass: 100 parts of butyl rubber; 40 to 100 parts by mass of polypropylene; 5-10 parts by mass of a vulcanizing agent; 0.5-2 parts by weight of an anti-aging agent; 5-40 parts by mass of a softening agent; and 5-40 parts by mass of a filler. The butyl rubber type thermoplastic vulcanized rubber is prepared from butyl rubber, polypropylene and a phenolic resin vulcanization system through a dynamic vulcanization method, a high-melting-point bromine-containing compound decabromodiphenyl ether and stannous chloride are adopted as co-vulcanizing agents to form the phenolic resin vulcanization system containing chlorine and bromine, the vulcanization activity is high, and the service life is long. The composition is simple and free of sulfur, the mechanical property is high, and the material can be processed and formed by adopting extrusion, injection molding and mould pressing methods at high temperature.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a butyl rubber type thermoplastic vulcanizate and a preparation method and application thereof. Background Art

[0002] Thermoplastic vulcanizate (TPV) is an elastomeric material that has both the reprocessing performance of the plastic phase and the performance of the rubber phase. Compared with traditional vulcanized rubber, TPV is recyclable, has a simple composition, a cleaner production process, and low energy consumption. It is a new type of elastomeric material that is greener, more environmentally friendly, and safer.

[0003] Currently, the commercialized TPV is EPDM rubber-based TPV, which uses EPDM rubber with a strong odor as the rubber phase. In addition, since peroxide vulcanizers are usually used, ketones and aldehydes are easily decomposed during high-temperature dynamic vulcanization, which have a pungent odor. In addition, EPDM rubber has a low loss factor and a narrow damping temperature range. This series of shortcomings limits its application. Therefore, butyl rubber-based TPV, which combines the excellent air tightness, shock-absorbing and damping performance of butyl rubber and low odor, has become one of the important development directions of TPV. However, the main chain saturated butyl rubber has low vulcanization reaction activity, long vulcanization time, and high vulcanizing agent dosage. The use of brominated butyl rubber (BIIR) instead of IIR to prepare TPV materials (invention patents CN 110791031A, CN 104725732 B) can improve this phenomenon. BIIR is a modified product of IIR, and active allyl bromide is introduced into the molecular chain. Since the bond energy of the Br-C bond is small, the cross-linking reaction activity of IIR is enhanced, so that it has a faster vulcanization speed and stronger vulcanization adaptability. Bromobutyl rubber is expensive, which greatly increases the production cost of TPV.

[0004] The present invention innovatively adopts a phenolic resin vulcanization system containing both chlorine and bromine elements, and uses stannous chloride and decabromodiphenyl ether as auxiliary vulcanizing agents to prepare a butyl rubber type vulcanizate. The process is simple. Compared with the butyl rubber type thermoplastic vulcanizate in the prior art, the amount of vulcanizing agent used is small, the safety is higher, and compared with the brominated butyl rubber type TPV, the production cost is low. Summary of the invention

[0005] In order to solve the above problems in the prior art, the present invention provides a butyl rubber type thermoplastic vulcanizate and a preparation method and application thereof.

[0006] In a first aspect, the present invention provides a butyl rubber type thermoplastic vulcanizate, wherein the thermoplastic vulcanizate

[0007] The glue contains the following components:

[0008]

[0009] As a specific embodiment of the present invention, the vulcanizing agent is a phenolic resin vulcanization system.

[0010] As a specific embodiment of the present invention, the phenolic resin vulcanization system includes a phenolic resin vulcanizing agent and a co-vulcanizing agent.

[0011] As a specific embodiment of the present invention, the weight ratio of the phenolic resin vulcanizing agent to the co-vulcanizing agent is (0.5-10):1.

[0012] As a specific embodiment of the present invention, the weight ratio of the phenolic resin vulcanizing agent to the co-vulcanizing agent is (5-10):1.

[0013] As a specific embodiment of the present invention, the phenolic resin vulcanizing agent is selected from at least one of octylphenolic resin and tert-butylphenolic resin.

[0014] As a specific embodiment of the present invention, the co-vulcanizing agent includes at least one of stannous chloride and decabromodiphenyl ether.

[0015] As a specific implementation of the present invention, the co-vulcanizing agent is a co-vulcanizing agent composed of stannous chloride and decabromodiphenyl ether.

[0016] As a specific embodiment of the present invention, the molar ratio of bromine to chlorine in the co-vulcanizing agent is (0.05-10):1.

[0017] As a specific embodiment of the present invention, the molar ratio of bromine to chlorine in the co-vulcanizing agent is (0.1-5):1.

[0018] As a specific embodiment of the present invention, the antioxidant includes at least one of the antioxidant 1010 and the antioxidant 168 .

[0019] As a specific embodiment of the present invention, the softener includes at least one of paraffin oil and rubber oil 6030.

[0020] As a specific embodiment of the present invention, the filler includes at least one of talc, titanium dioxide, and light calcium.

[0021] As a specific embodiment of the present invention, the butyl rubber is a butyl rubber with high unsaturation and high Mooney viscosity, wherein the unsaturation (mole fraction%) of the butyl rubber is 1.7±0.20, and the Mooney viscosity is ML (1+8) 125℃ 50±5.

[0022] As a specific embodiment of the present invention, the polypropylene has a low melt flow index and a high heat deformation temperature. The melt flow index of the polypropylene at 230°C and 2.16kg is 0.3-3.8g / 10min, and the heat deformation temperature is 90-105°C.

[0023] The above raw materials in the present invention can be prepared in-house or commercially available, and the present invention is not particularly limited thereto.

[0024] In a second aspect, the present invention provides a method for preparing the butyl rubber type thermoplastic vulcanizate, comprising the following steps:

[0025] S1: Evenly mix polypropylene, butyl rubber, antioxidant, softener and filler to obtain a rubber-plastic blend;

[0026] S2: adding a vulcanizing agent to the rubber-plastic blend obtained in step S1 and mixing the mixture evenly to obtain a rubber-plastic vulcanization premix;

[0027] S3: Granulate the rubber-plastic vulcanization premix obtained in step S2 to obtain granules of butyl rubber type thermoplastic vulcanizate.

[0028] As a specific embodiment of the present invention, in step S1 and step S2, the mixing conditions independently include: mixing temperature of 180-220° C., rotation speed of 100-300 r / min, and mixing time of 5-10 min.

[0029] As a specific embodiment of the present invention, in step S3, the granulation method includes dynamic vulcanization granulation, the granulation equipment is preferably a twin-screw extruder, and the process conditions include: the twin-screw temperature is 160-230°C, and the rotation speed is 100-300r / min. .

[0030] In a third aspect, the present invention provides applications of the butyl rubber-type thermoplastic vulcanizate in the fields of seals, shock absorbers, plastic floors, cables, and pipes.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The invention adopts a vulcanization system containing both chlorine and bromine elements, takes stannous chloride and decabromodiphenyl ether as auxiliary vulcanizing agents, and prepares a butyl rubber type thermoplastic vulcanizer. Compared with the butyl rubber type thermoplastic vulcanizer in the prior art, the invention can achieve high vulcanization activity and less vulcanizer dosage of brominated butyl rubber type thermoplastic vulcanizate without changing the preparation process, and has higher safety. Meanwhile, compared with the brominated butyl rubber type thermoplastic vulcanizate, butyl rubber is used as the rubber phase, and the production cost is lower. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with specific embodiments, but they do not constitute any limitation to the present invention.

[0034] The specific information of the test method used in each embodiment of the present invention is as follows:

[0035] The GT-AT-7000M electronic tensile testing machine of Taiwan High Speed ​​Rail Technology Co., Ltd. was used to test the tensile strength and elongation at break. The test standard was based on GB / T 528-2009.

[0036] The hardness test was carried out using the LX-A Shore hardness tester produced by Shanghai Testing Machinery Co., Ltd., and the test standard was based on GB / T531-1999.

[0037] Example 1

[0038] This embodiment provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, the specific details of which are as follows:

[0039] S1: Using an internal mixer at a temperature of 190°C, 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0040] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 6.4 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan), 0.544 parts by mass of decabromodiphenyl ether (Aladdin) and 4.16 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0041] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0042] Example 2

[0043] This embodiment provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, the specific details of which are as follows:

[0044] S1: Using an internal mixer at a temperature of 190°C, 54 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0045] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 6.4 parts by mass of tert-butylphenol-formaldehyde resin (RT4201, Jinan Shengquan), 0.544 parts by mass of decabromodiphenyl ether (Aladdin) and 0.736 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0046] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0047] Example 3

[0048] This embodiment provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, the specific details of which are as follows:

[0049] S1: Using an internal mixer at a temperature of 190°C, 43 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, and 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (168, BASF), 20 parts by mass of paraffin oil (P-500, Shandong Taichang Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0050] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 6.4 parts by mass of tert-butylphenol-formaldehyde resin (RT4201, Jinan Shengquan), 0.544 parts by mass of decabromodiphenyl ether (Aladdin) and 0.736 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0051] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0052] Example 4

[0053] This embodiment provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, the specific details of which are as follows:

[0054] S1: Using an internal mixer at a temperature of 190°C, 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of talcum powder (K ​​brand, Guilin Guiguang) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0055] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, wrapping the rolls, adding 6.4 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan), 0.27 parts by mass of decabromodiphenyl ether (Aladdin) and 3.68 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent to obtain a premix;

[0056] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0057] Example 5

[0058] This embodiment provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, the specific details of which are as follows:

[0059] S1: Using an internal mixer at a temperature of 190°C, 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of titanium dioxide (RCL69, Meili Lian) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0060] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 6.4 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan), 1.15 parts by mass of decabromodiphenyl ether (Aladdin) and 2.4 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0061] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0062] Example 6

[0063] This embodiment provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, the specific details of which are as follows:

[0064] S1: Using an internal mixer at a temperature of 200°C, 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0065] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 6.4 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan), 0.128 parts by mass of decabromodiphenyl ether (Aladdin) and 1.15 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0066] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0067] Example 7

[0068] This embodiment provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, the specific details of which are as follows:

[0069] S1: Using an internal mixer at a temperature of 190°C, 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0070] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 8 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan), 2.6 parts by mass of decabromodiphenyl ether (Aladdin) and 0.5 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0071] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0072] Example 8

[0073] This embodiment provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, the specific details of which are as follows:

[0074] S1: Using an internal mixer at a temperature of 190°C, 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0075] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 10 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan), 1.14 parts by mass of decabromodiphenyl ether (Aladdin) and 0.11 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0076] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0077] Comparative Example 1

[0078] This comparative example provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, and the specific details are as follows:

[0079] S1: Using an internal mixer at a temperature of 190°C, 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0080] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 10 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan) and 2 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0081] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0082] Comparative Example 2

[0083] This comparative example provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, and the specific details are as follows:

[0084] S1: Using an internal mixer at a temperature of 190°C, 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0085] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 6.4 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan) and 1.28 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0086] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0087] Comparative Example 3

[0088] This comparative example provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, and the specific details are as follows:

[0089] S1: Using an internal mixer at a temperature of 190° C., 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of bromobutyl rubber (2255, Exxon), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0090] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 6.4 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan) and 1.28 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0091] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0092] Comparative Example 4

[0093] This comparative example provides a butyl rubber type thermoplastic vulcanizate and a preparation method thereof, and the specific details are as follows:

[0094] S1: Using an internal mixer at a temperature of 190°C, 67 parts by mass of polypropylene (PP 4220, Yanshan Petrochemical) was added and mixed for 2 min, 100 parts by mass of butyl rubber (IIR 301, LANXESS, Germany), 1 part by mass of antioxidant (1010, Shanghai Shanpu Chemical), 20 parts by mass of rubber oil (6030, Karamay Petrochemical) and 20 parts by mass of light calcium (1250, Shanghai Botong Chemical) were added, and mixed for 7 min to obtain a rubber-plastic melt blend, which was cooled for standby use;

[0095] S2: placing the rubber-plastic melt blend in step S1 on a cold roll mill, adding 10 parts by mass of octylphenol-formaldehyde resin (RT4201, Jinan Shengquan), 10 parts by mass of decabromodiphenyl ether (Aladdin) and 0.4 parts by mass of stannous chloride (Tianjin Beilian) vulcanizing agent after rolling to obtain a premix;

[0096] S3: The rubber-plastic premix prepared in S2 is dynamically vulcanized by a twin-screw extruder at an extrusion temperature of 200° C. and a screw speed of 200 r / min to obtain pellets of butyl rubber-type thermoplastic vulcanizate.

[0097] The butyl rubber type thermoplastic vulcanizates prepared in Examples 1-8 and Comparative Examples 1-4 were subjected to performance tests, and the obtained performance parameters are shown in Table 1.

[0098] Table 1 Ratios and properties of raw material components in Examples 1-8 and Comparative Examples 1-4

[0099]

[0100] As can be seen from Table 1, when the co-vulcanizing agent decabromodiphenyl ether and stannous chloride in the present invention are used, when the amount of the vulcanizing agent phenolic resin is 6.4-10 parts by mass, the prepared butyl rubber type thermoplastic vulcanizate has a Shore hardness of 85A-95A, a tensile strength of up to 12.40MPa, and an elongation at break of 356%, and has good physical properties. The preferred range of the amount of the vulcanizing agent phenolic resin is 8-10 parts by mass, and the preferred range of the co-vulcanizing agent decabromodiphenyl ether is less than 10 parts by mass.

[0101] Compared with the comparative example, it can be seen that when the amount of the butyl rubber type thermoplastic vulcanizate vulcanizing agent used in the present invention is the same as that of the brominated butyl rubber type thermoplastic vulcanizate, the physical properties are equivalent to those of the traditional butyl rubber type thermoplastic vulcanizate. The butyl rubber type thermoplastic vulcanizate of the present invention has moderate hardness at room temperature, high physical properties and high elongation at break. When the mass fraction of the co-vulcanizing agent decabromodiphenyl ether exceeds 10 parts, the performance begins to decrease.

[0102] Any numerical value mentioned in the present invention, if there is only an interval of two units between any minimum value and any maximum value, includes all values ​​from the minimum value to the maximum value each time increasing by one unit. For example, if the amount of a component, or the value of a process variable such as temperature, pressure, time, etc. is declared to be 50-90, in this specification it means that 51-89, 52-88... and 69-71 and 70-71 are specifically listed. For non-integer values, 0.1, 0.01, 0.001 or 0.0001 can be appropriately considered as a unit. These are just some specially specified examples. In this application, in a similar manner, all possible combinations of numerical values ​​between the listed minimum and maximum values ​​are considered to have been disclosed.

[0103] It should be noted that the embodiments described above are only used to explain the present invention and do not constitute any limitation to the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present invention may be modified as specified within the scope of the claims of the present invention, and the present invention may be revised without departing from the scope and spirit of the present invention. Although the present invention described therein relates to specific methods, materials and embodiments, it does not mean that the present invention is limited to the specific examples disclosed therein, on the contrary, the present invention can be extended to all other methods and applications with the same functions.

Claims

1. A butyl rubber type thermoplastic vulcanizate, characterized in that: The thermoplastic vulcanizate comprises the following components:

2. The butyl rubber type thermoplastic vulcanizate according to claim 1, characterized in that: The vulcanizing agent is a phenolic resin vulcanization system; Preferably, the phenolic resin vulcanization system comprises a phenolic resin vulcanizer and a co-vulcanizing agent; the weight ratio of the phenolic resin vulcanizer to the co-vulcanizing agent is preferably (0.5-10):1, more preferably (5-10):1; More preferably, the phenolic resin vulcanizing agent is selected from at least one of octylphenolic resin and tert-butylphenolic resin; and / or the co-vulcanizing agent includes at least one of stannous chloride and decabromodiphenyl ether, preferably a co-vulcanizing agent composed of stannous chloride and decabromodiphenyl ether, and the molar ratio of bromine to chlorine in the co-vulcanizing agent is preferably (0.05-10):1, more preferably (0.1-5):

1.

3. The butyl rubber type thermoplastic vulcanizate according to claim 1 or 2, characterized in that: The antioxidant includes at least one of the antioxidant 1010 and the antioxidant 168 ; and / or the softener includes at least one of paraffin oil and rubber oil 6030 .

4. The butyl rubber type thermoplastic vulcanizate according to any one of claims 1 to 3, characterized in that: The filler includes at least one of talcum powder, titanium dioxide and light calcium.

5. The butyl rubber type thermoplastic vulcanizate according to any one of claims 1 to 4, characterized in that: The unsaturation degree (mole fraction%) of the butyl rubber is 1.7±0.20, and the Mooney viscosity ML (1+8) 125℃ 50±5.

6. The butyl rubber type thermoplastic vulcanizate according to any one of claims 1 to 5, characterized in that: The polypropylene has a melting index of 0.3-3.8 g / 10 min at 230° C. and 2.16 kg, and a heat deformation temperature of 90-105° C.

7. A method for preparing a butyl rubber type thermoplastic vulcanizate according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Evenly mix polypropylene, butyl rubber, antioxidant, softener and filler to obtain a rubber-plastic blend; S2: adding a vulcanizing agent to the rubber-plastic blend obtained in step S1 and mixing the mixture evenly to obtain a rubber-plastic vulcanization premix; S3: Granulate the rubber-plastic vulcanization premix obtained in step S2 to obtain granules of butyl rubber type thermoplastic vulcanizate.

8. The preparation method according to claim 7, characterized in that: In step S1 and step S2, the mixing conditions independently include: a mixing temperature of 180-220° C., a rotation speed of 100-300 r / min, and a mixing time of 5-10 min.

9. The preparation method according to claim 7 or 8, characterized in that: In step S3, the granulation method includes dynamic vulcanization granulation, and the granulation equipment is preferably a twin-screw extruder. The process conditions include: the twin-screw temperature is 160-230° C., and the rotation speed is 100-300 r / min.

10. Use of the butyl rubber type thermoplastic vulcanizate according to any one of claims 1 to 6 or the butyl rubber type thermoplastic vulcanizate prepared by the preparation method according to any one of claims 7 to 9 in the fields of seals, shock absorbers, plastic floors, cables, and pipes.

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