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Ethylene propylene diene monomer, and preparation method thereof

A technology of EPDM rubber and raw rubber, which is applied in the field of rubber and can solve problems such as poor mechanical properties, slow vulcanization speed, and large compression deformation

Inactive Publication Date: 2017-09-15
ZHEJIANG LONGSHENGHUA RUBBER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, EPDM has been widely reported. For example, in the Chinese patent document with application number 201310211405.5, a flame-retardant EPDM rubber is introduced, which has flame-retardant properties, improved flame-retardant three The characteristics of the processing performance of ethylene propylene rubber, which uses a sulfur vulcanization system, has excellent dynamic mechanical properties, but its aging resistance is poor, and its compression deformation is large. function or release carcinogenic nitrosamines during use, which can easily cause problems such as health and environmental protection
In the Chinese patent literature with the application number 201110123538.8, a EPDM rubber vulcanization system is introduced, which uses a reactive resin as the main vulcanizing agent, which effectively improves the high temperature resistance of the rubber, but the resin vulcanization system has a vulcanization speed Slow, high vulcanization temperature, high hardness of vulcanizate obtained, low elongation at break, etc., are not suitable for industrial production
In the Chinese patent literature with the application number 201410255140.3, an EPDM rubber of a peroxide rapid vulcanization system is introduced, which consists of EPDM raw rubber, a peroxide vulcanizing agent, an auxiliary crosslinking agent, and Although the vulcanized rubber under the peroxide vulcanization system has excellent heat resistance, small compression set, and no vulcanization reversion phenomenon, its dynamic performance is poor, vulcanization speed is slow, and mechanical properties are poor.

Method used

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  • Ethylene propylene diene monomer, and preparation method thereof

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preparation example Construction

[0022] Correspondingly, the present invention also provides a preparation method of EPDM rubber, comprising the following steps: adding 100-150 parts by weight of raw EPDM rubber to a Haake rheometer, and then adding 0.5-1 parts by weight parts by weight of sulfur, 1-6 parts by weight of zinc oxide, 0.5-2 parts by weight of accelerators, 5-20 parts by weight of flame retardants, 0.5-3 parts by weight of anti-aging agents and 5-20 parts by weight of functional fillers, the temperature of the rubber compound reaches 105- Discharge the rubber material at 120°C, the functional filler is polyionic liquid coated nano-calcium carbonate particles; mix the rubber material evenly on an open mill, pack it into a triangular bag, thin it, and then release it to obtain a mixed rubber; Put the mixed rubber at room temperature, and vulcanize to obtain EPDM rubber, the vulcanization pressure is 10-25MPa, the vulcanization temperature is 160-180°C, and the vulcanization time is 100-150s.

[002...

Embodiment 1

[0036] Accelerator of the present invention is ionic liquid trimethyltetradecyl quaternary phosphine cation 2-mercaptobenzothiazole anion salt, and concrete preparation method is as follows:

[0037] Mix 0.1mol ionic liquid trimethyltetradecyl quaternary phosphine salt and 50mL methanol to prepare a solution, add 0.1mol 2-mercaptobenzothiazole and 0.1mol sodium hydroxide, stir magnetically at 25°C for 24h, and stop the reaction The unreacted impurity solids were removed by filtration, washed with acetone, and the product was dried in a drying oven at 50° C. for 8 hours to obtain an accelerator, which was set aside.

[0038] The ionic liquid monomer is vinylimidazolium cation n-butyl xanthate anion salt, and the specific preparation method is as follows:

[0039] Mix 0.1 mol of ionic liquid vinylimidazolium bromide and 30 ml of methanol to prepare a solution, add 0.1 mol of n-butyl xanthate, stir magnetically at 0°C for 18 hours, stop the reaction and filter to remove unreacted...

Embodiment 2

[0048] The preparation method of accelerator and functional filler is the same as embodiment 1, the preparation method of high-performance EPDM rubber, and its steps are as follows:

[0049] Set the initial temperature of the Haake rheometer to 50°C, the rotational speed to 40r / min, and the debinding temperature to 90°C to avoid early scorching of the rubber. Add 150 parts by weight of raw EPDM rubber to the Haake rheometer, and after the torque is stable, add 0.5 parts by weight of sulfur, 2 parts by weight of zinc oxide, 5 parts by weight of functional filler, and 10 parts by weight of flame retardant , 0.75 parts by weight of an accelerator and 3 parts by weight of an anti-aging agent, and the rubber material is discharged when the temperature of the rubber material reaches 120°C. The rubber material mixed in the Haake rheometer is further mixed evenly on the open mill, and the triangle bag is made three times on the left and right, and after five times of thinning, the fil...

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Abstract

The invention provides an ethylene propylene diene monomer, and a preparation method thereof. The ethylene propylene diene monomer is prepared from an ethylene propylene diene monomer crude rubber, sulphur, zinc oxide, a functional filling material, a fire retardant, a accelerant, and an antioxidant. According to the preparation method, nanometer calcium carbonate particles coated with a polyionic liquid are taken as the functional filling material; on one hand, nanometer calcium carbonate is modified by the polyionic liquid, the bonding force between calcium carbonate and a rubber matrix is improved, and the mechanical properties of the ethylene propylene diene monomer are improved, and on the other hand, xanthogenic acid is used for providing the negative ions in the ethylene propylene diene monomer, the oxygen atoms can be used for providing lone electron pairs, synergistic activation of S8 rings of sulphur is realized by xanthogenic acid and the accelerant, the crosslinking time of rubber macromolecular radicals with rubber molecular chains is promoted, and sulfuration time is shortened. The high performance is green, is friendly to the environment, and possesses flame resistance; rapid sulfuration is realized; compression deformation is low; heat aging resistance is excellent; the preparation method is simple; operation is convenient; and the preparation method is suitable for industrialized production.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a EPDM rubber and a preparation method thereof. Background technique [0002] Ethylene-propylene-diene rubber (EPDM) is a terpolymer of ethylene, propylene and non-conjugated dienes. Due to its excellent weather resistance, chemical resistance and electrical properties, it is widely used in wires and cables, conveyor belts, and rubber hoses. , body sealing products and waterproof materials and other fields. With the increasing market demand year by year, various industries have put forward higher requirements for the performance of EPDM rubber. [0003] In the prior art, EPDM has been widely reported. For example, in the Chinese patent document with application number 201310211405.5, a flame-retardant EPDM rubber is introduced, which has flame-retardant properties, improved flame-retardant three The characteristics of the processing performance of ethylene propylene rubber, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K13/06C08K9/10C08K3/22C08K5/37C08K3/06
CPCC08K13/06C08K3/06C08K3/22C08K5/37C08K9/10C08K2003/2224C08K2003/2227C08K2003/2296C08K2003/265C08K2201/011C08L2201/02C08L2201/08C08L2312/00C08L23/16
Inventor 鲍万晴戴连会
Owner ZHEJIANG LONGSHENGHUA RUBBER
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