acrylonitrile-butadiene rubber

acrylonitrile-butadiene rubber C화학적 특성, 용도, 생산

개요

Nitrile rubber (NR) is a copolymer of butadiene and acrylonitrile. It is produced in different ratios varying from 25:75 to 75:25. The manufacturer’s designation should identify the percentage of acrylonitrile. Nitrile rubber under the common trade name Buna? N is well known for its excellent resistance to oils and solvents owing to its resistance to swelling when immersed in mineral oils. Moreover, its chemical resistance to oils is proportional to the acrylonitrile content. However, it is not resistant to strong oxidizing chemicals such as nitric acid, and it exhibits fair resistance to ozone and to UV irradiation which severely embrittles it at low temperatures. Nitrile rubber is used for gasoline hoses, fuel pumps diaphragm, gaskets, seals and packings (e.g., o-rings) and finally oil-resistant soles for safety work shoes.

화학적 성질

(Medium acrylonitrile) D (polymer) 0.98, tensile strength (psi) 1000–3000, elongation (%) 100–700, maximum service temperature 121– 148C. Combustible.

용도

(High acrylonitrile) Oil well parts, fuel-tank liners, fuel hoses, gaskets, packing oil seals, hydraulic equipment. (Medium acrylonitrile) General-purpose oil-resistant applications, shoe soles, kitchen mats, sink topping, and printing rolls. (Low acrylonitrile) Gaskets, grommets, and O-rings (flexible at a very low temperature), adhesives. Fuel binder in solid rocket propellants.

정의

(acrylonitrile rubber; acrylonitrilebutadiene rubber; nitrile-butadiene rubber; NBR). A synthetic rubber made by random polymerization of acrylonitrile with butadiene by free radical catalysis. Alternating copolymers using Natta–Ziegler catalyst have been developed. Approximately 20% of the total is used as latex; also available in powder form. Its repeating structure may be represented as –CH2CH=CHCH2CH2 CH(CN)–.

공업 용도

Nitrile butyl rubber (NBR) has excellent resistance to mineral and vegetable oils, but relatively poor resistance to the swelling action of oxygenated solvents such as acetone, methyl ethyl ketone, and other ketones. It has good resistance to acids and bases except those having strong oxidizing effects. Resistance to heat aging is good, often a key advantage over natural rubber. With compounding, nitrile rubbers can provide a good balance of low creep, good resilience, low permanent set, and good abrasion resistance.
Tear resistance is inferior to that of natural rubber, and electrical insulation is lower. Uses of NBR include carburetor and fuel-pump diaphragms and aircraft hoses and gaskets. In many of these applications, the nitriles compete with polysulfides and neoprenes.
An outstanding feature of nitrile rubber is its compatibility with many different types of resins permitting it to be easily blended with them. In combination with phenolic resins it provides adhesives with especially high strengths. Nitrile rubber phenolic resin solvent solutions are used in shoe sole-attaching adhesives, for structural bonding in aircraft, adhering automotive brake lining to brake shoes, and many other industrial applications. The ratio of butadiene to acrylonitrile in the commercially available rubbers ranges from a low of about 20% to as high as 50% acrylonitrile. The various grades are usually referred to as high, medium-high, medium-low, and low acrylonitrile content.

acrylonitrile-butadiene rubber 준비 용품 및 원자재

원자재

준비 용품

acrylonitrile-butadiene rubber 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Wuhan Xiang Dingda Biotechnology Co., Ltd.	13476180745	1875023037@qq.com	CHINA	435	58
Hubei Xingyinhe Chemical Co., Ltd.	13307112120	1506207717@qq.com	CHINA	630	58
Wuhan Hongde Yuexin Pharmatech Co.,Ltd	027-83855393 15071227934	3306264753@qq.com	China	1864	58
Nanjing Bermuda Biotechnology Co., Ltd.	027-1734052141618086404407 17340521416	1757224788@qq.com	China	2010	58
Hubei Longxin Chemical Industry Co., Ltd.	15271551270	ycwlb056@yeah.net	China	2089	58
Guangzhou Yunmen Biotechnology Co., Ltd	18902340307 18902340307	3356812514@qq.com	China	9238	58
Guangdong wengjiang Chemical Reagent Co., Ltd.	0751-2815987 13927875076	3007432263@qq.com	China	10001	58
HUBEI CHANGYAO BIOTECHNOLOGY CO LTD	17683887209	906856569@qq.com	China	4559	58

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