申请人:THE GOODYEAR TIRE & RUBBER COMPANY
公开号:EP0669370A1
公开(公告)日:1995-08-30
5n7 Seals for automotive body applications (such as, windows, hoods, trunks and doors) and building applications (such as, window glazing gaskets and weather strips) should be dimensional stable, provide low compression set, and offer outstanding sealing characteristics over a broad temperature range. They must be capable of sealing out noise, wind and water, while providing long-term ultraviolet light resistance. This invention discloses a highly crosslinked nitrile rubber composition which can be easily blended with polyvinyl chloride to make compositions having excellent characteristics for automotive body seals and building industry applications including dimensional stability, low compression set, outstanding sealing characteristics, good low temperature flexibility, and good recyclability, said highly crosslinked nitrile rubber composition being comprised of (1) a highly crosslinked nitrile rubber having repeat units which are derived from (a) 1,3-butadiene, (b) acrylonitrile, and (c) a crosslinking agent, wherein said highly crosslinked nitrile rubber has a Mooney viscosity of about 50 to about 120, a swelling index of less than about 10 percent, a mill shrinkage of less than 10 percent, and a gel content of greater than 90 percent; and (2) from about 1 to about 30 phr of a plasticizer.
5n7 用于汽车车身应用(如车窗、引擎盖、行李箱和车门)和建筑应用(如车窗玻璃垫圈和耐候条)的密封件应尺寸稳定、压缩永久变形小,并在较宽的温度范围内具有出色的密封特性。它们必须能够隔绝噪音、风和水,同时提供长期的抗紫外线性能。本发明公开了一种高交联丁腈橡胶组合物,这种组合物可以很容易地与聚氯乙烯混合,制成具有优异特性的组合物,用于汽车车身密封和建筑行业应用,包括尺寸稳定性、低压缩永久变形、出色的密封特性、良好的低温柔韧性和良好的可回收性、所述高交联丁腈橡胶组合物由以下成分组成:(1) 高交联丁腈橡胶,其重复单元来源于 (a) 1,3-丁二烯、(b) 丙烯腈和 (c) 交联剂,其中所述高交联丁腈橡胶的门尼粘度约为 50 至 120,膨胀指数小于约 10%,轧机收缩率小于 10%,凝胶含量大于 90%;(2) 约 1 至约 30 phr 的增塑剂。