The by-product of aluminum etching process was added to acrylonitrile butadiene rubber (NBR), which is the construction material of automotive hose. Cure characteristics, physical properties, thermal resistance and flame retardency of NBR compounds were measured, and optimum mixing ratio of rubber and additives was deduced from the experimental results. The by-product of etching, produced in the process of surface treatment of aluminum, was converted to aluminum hydroxide through crushing and purification. This was then mixed to NBR as a thermal and flame retardent within the range of 0∼80 phr. Thermal resistance and flame retardency as well as other characteristics and physical properties of compounded rubber specimens were measured. The optimum mixing ratio of rubber to additives to give maximum effect on thermal resistance and flame retardency, within the range of tolerable specification for rubber materials, was determined to be 40 phr, and at this mexing ratio, the flame retardency of NBR was foundto be increased by 5 times.

가공한 알루미늄 엣칭 부산물을 자동차용 호스의 구성재료인 아크릴로니트릴부타디엔고부(NBR)에 첨가하여 NBR 배합고무의 가황 특성, 물성, 내열 및 난연 특성을 측정하였으며, 실험결과로부터 고무와 첨가제의 최적배합조건을 도출하였다. 알루미늄 표면처리 공정에서 발생되는 엣칭 부산물은 분쇄와 정제를 거쳐 수산화알루미늄으로 가공하였으며, 내열 및 난연제로서 NBR에 0∼80 phr 범위에서 배합하고, 고무시편의 경도, 인장강도, 신장율 및 난연성을 측정한 결과, 고무재료 규격을 초과하지 않는 범위내에서 최대의 내열 및 난연효과를 주는 수산화알루미늄의 첨가량은 40 phr로 나타났으며, 이 배합비에서 NBR의 난연성은 5배 정도 향상되었다.