阅读说明：本技术 丁腈橡胶改性聚合物及其制备方法、密封材料和减震垫片 (Nitrile rubber modified polymer, preparation method thereof, sealing material and damping gasket ) 是由 夏有贵 于 2019-09-29 设计创作，主要内容包括：本发明属于橡胶技术领域,具体涉及一种丁腈橡胶改性聚合物及其制备方法、密封材料和减震垫片。本丁腈橡胶改性聚合物配方按重量份组成包括如下原料：丁腈橡胶：100份；硫化剂：0.3-3份；炭黑：1-5份；阻燃剂：0.1-2份；抗氧剂：0.5-2.5份；光稳定剂：0.1-1份；硅烷偶联剂：0.1-0.3份；以及聚合物微球：0.1-3份。本发明的丁腈橡胶改性聚合物以较大损耗模量的丁腈橡胶作为主体材料,配合聚合物微球和其他添加剂,通过硫化剂硫化得到回弹性较好的网络交联弹性体,可以提高丁腈橡胶改性聚合物的弹性形变恢复能力,提高吸收冲击,具有较大的伸长率及拉伸强度,同时材料柔软、防水隔音效果优异,缓冲性能优良。(The invention belongs to the technical field of rubber, and particularly relates to a nitrile rubber modified polymer, a preparation method thereof, a sealing material and a damping gasket. The nitrile rubber modified polymer formula comprises the following raw materials in parts by weight: nitrile rubber: 100 parts of (A); vulcanizing agent: 0.3-3 parts; carbon black: 1-5 parts; flame retardant: 0.1-2 parts; antioxidant: 0.5-2.5 parts; light stabilizer: 0.1-1 part; silane coupling agent: 0.1-0.3 part; and polymeric microspheres: 0.1-3 parts. The nitrile rubber modified polymer provided by the invention takes nitrile rubber with a large loss modulus as a main material, is matched with polymer microspheres and other additives, and is vulcanized by a vulcanizing agent to obtain a network crosslinked elastomer with good resilience, so that the elastic deformation recovery capability of the nitrile rubber modified polymer can be improved, the impact absorption is improved, the elongation and tensile strength are large, and meanwhile, the material is soft, excellent in waterproof and soundproof effects and excellent in buffering performance.)

1. The nitrile rubber modified polymer is characterized by comprising the following raw materials in parts by weight:

nitrile rubber: 100 parts of (A);

vulcanizing agent: 0.3-3 parts;

carbon black: 1-5 parts;

flame retardant: 0.1-2 parts;

antioxidant: 0.5-2.5 parts;

light stabilizer: 0.1-1 part;

silane coupling agent: 0.1-0.3 part; and

polymer microspheres: 0.1-3 parts.

2. The nitrile rubber modified polymer according to claim 1,

the Shore A hardness of the nitrile rubber is 30-55, and the relative density is 0.89-0.95g/cm³The Mooney viscosity is 20-60; and

wherein the acrylonitrile content is 18-40%.

3. The nitrile rubber modified polymer according to claim 1,

the polymer microsphere is a hollow polymer sphere, the particle size of the hollow polymer sphere is 20-80 mu m, and the wall thickness of the hollow polymer sphere is 5-15 mu m.

4. The nitrile rubber modified polymer according to claim 1,

the vulcanizing agent comprises one or more of sulfur, benzoyl peroxide, 1-bis (di-tert-butylperoxy) -3,3, 5-trimethylcyclohexane, 2, 5-dimethyl-2, 5-di (benzoylperoxy) hexane, tert-butyl peroxybenzoate, dicumyl peroxide, 1,3-1, 4-di (tert-butylperoxyisopropyl) benzene, dicumyl peroxydicarbonate and lauroyl peroxide.

5. The nitrile rubber modified polymer according to claim 1,

the flame retardant comprises one or more of phosphate, halogen, halogenated phosphate, ammonium polyphosphate and magnesium hydroxide.

6. The nitrile rubber modified polymer according to claim 1,

the antioxidant comprises one or more of 2, 6-di-tert-butyl-p-cresol, styryl phenol, 2, 5-di-tert-butyl-p-diphenol, 2' -dimethylene bis- (4-methyl-6-tert-butylphenol), 2, 4-trimethyl-1, 2-dihydroquinoline polymer, octadecyl-3, 5-bis (1, 1-dimethylethyl) -4-hydroxyphenylpropionate, tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] pentaerythritol ester, tris (2, 4-di-tert-butylphenyl) phosphite and 2-mercaptobenzimidazole.

7. The nitrile rubber modified polymer according to claim 1,

the light stabilizer comprises one or more of o-hydroxybenzophenone, benzotriazole, salicylate, triazine, substituted acrylonitrile and hindered amine.

8. A preparation method of a nitrile rubber modified polymer is characterized by comprising the following steps:

the nitrile rubber is milled and thinned through an open mill;

sequentially adding a silane coupling agent, an antioxidant, a light stabilizer, polymer microspheres, carbon black and a vulcanizing agent in the scouring process; and

and after multiple thin passes, cooling at normal temperature to form the nitrile butadiene rubber modified polymer.

9. A sealing material characterized in that it comprises, in a solid state,

the sealing material is suitable for high-temperature spiral extrusion molding of nitrile rubber modified polymer.

10. The application of a sealing material as a shock-absorbing gasket.

Technical Field

The invention belongs to the technical field of rubber, and particularly relates to a nitrile rubber modified polymer, a preparation method thereof, a sealing material and a damping gasket.

Background

As a buffering sound insulation material, rubber is not only more and more applied to electronic products such as mobile phones, computers, notebooks and the like, but also more applied to the field of living homes, such as bedroom door frames and automobile door frame sound insulation sealing strips. Ethylene propylene diene monomer rubber as a common sealing material can well insulate water and insulate sound, but is limited by the fact that the material is hard and cannot be stably attached to a door frame, and the sound insulation effect is poor; meanwhile, the problems that the damping effect is poor, the sound generated by closing the door is large and the like exist, and the daily household life of people is seriously influenced.

Disclosure of Invention

The invention aims to provide a nitrile rubber modified polymer, a preparation method thereof, a sealing material and a damping gasket.

In order to solve the technical problems, the invention provides a nitrile rubber modified polymer which comprises the following raw materials in parts by weight: nitrile rubber: 100 parts of (A); vulcanizing agent: 0.3-3 parts; carbon black: 1-5 parts; flame retardant: 0.1-2 parts; antioxidant: 0.5-2 parts; light stabilizer: 0.1-1 part; silane coupling agent: 0.1-0.3 part; and polymeric microspheres: 0.1-3 parts.

Further, the Shore A hardness of the nitrile rubber is 30-55, and the relative density is 0.89-0.95g/cm³The Mooney viscosity is 20-60; and wherein the acrylonitrile content is 18-40%.

Furthermore, the polymer microsphere is a hollow polymer sphere, the particle size of the hollow polymer sphere is 20-80 μm, and the wall thickness of the hollow polymer sphere is 5-15 μm.

Further, the vulcanizing agent comprises one or more of sulfur, benzoyl peroxide, 1-bis (di-tert-butylperoxy) -3,3, 5-trimethylcyclohexane, 2, 5-dimethyl-2, 5-di (benzoylperoxy) hexane, tert-butyl peroxybenzoate, dicumyl peroxide, 1,3-1, 4-di (tert-butylperoxyisopropyl) benzene, diisopropyl peroxydicarbonate and lauroyl peroxide.

Further, the flame retardant comprises one or more of phosphate esters, halogen series, halogenated phosphate esters, ammonium polyphosphate and magnesium hydroxide.

Further, the antioxidant comprises one or more of 2, 6-di-tert-butyl-p-cresol, styryl phenol, 2, 5-di-tert-butyl-p-diphenol, 2' -dimethylene bis- (4-methyl-6-tert-butylphenol), 2, 4-trimethyl-1, 2-dihydroquinoline polymer, octadecyl-3, 5-bis (1, 1-dimethylethyl) -4-hydroxyphenylpropionate, tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] pentaerythritol ester, tris (2, 4-di-tert-butylphenyl) phosphite and 2-mercaptobenzimidazole.

Further, the light stabilizer comprises one or more of o-hydroxybenzophenone, benzotriazole, salicylate, triazine, substituted acrylonitrile and hindered amine.

In a second aspect, the present invention also provides a method for preparing a nitrile rubber modified polymer, comprising: the nitrile rubber is milled and thinned through an open mill; sequentially adding a silane coupling agent, an antioxidant, a light stabilizer, polymer microspheres, carbon black and a vulcanizing agent in the scouring process; and after multiple thin passes, cooling at normal temperature to form the nitrile rubber modified polymer.

The nitrile rubber modified polymer and the preparation method thereof have the beneficial effects that the nitrile rubber with larger loss modulus is used as a main material, the polymer microspheres and other additives are matched, and the network cross-linked elastomer with better resilience is obtained by vulcanizing through the vulcanizing agent, so that the elastic deformation recovery capability of the nitrile rubber modified polymer can be improved, the absorption impact is improved, the elongation and the tensile strength are higher, and meanwhile, the material is soft, excellent in waterproof and sound insulation effects and excellent in buffering performance.

In a third aspect, the invention also provides a sealing material which is suitable for high-temperature spiral extrusion forming through nitrile rubber modified polymer.

In a fourth aspect, the invention also provides the application of the sealing material as a shock-absorbing gasket.

The sealing material and the damping gasket are formed by the high-temperature spiral extrusion of the nitrile rubber modified polymer, and particularly when the material is applied to door frame sealing strips or other damping gaskets, the sealing material and the damping gasket can effectively disperse impact force caused by door closing by utilizing the larger elasticity and loss modulus of the nitrile rubber modified polymer; and when the door is closed, the edge of the door can be tightly attached to the sealing strip of the door frame, and the sound insulation and shock absorption effects are excellent. Not only the gas tightness is good, and the sound of closing the door is lighter, has promoted whole life level.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.