Acrylic rubber compositions and heat-resistant hoses

摘要

A carboxyl group-containing acrylic rubber composition is adapted for vulcanization and/or use in contact with PET yarns, contains 1 to 15 phr of a metal-chelated guanidine compound, and contains no guanidine compound, or not more than 0.9 phr of a guanidine compound. A heat-resistant hose has a rubber layer formed from the acrylic rubber composition and a layer of PET yarns contacting it. In the heat-resistant hose made by using a carboxyl group-containing acrylic rubber, it is possible to prevent any deterioration of PET yarns caused by a commonly used vulcanization promotor without impairing the outstanding properties of acrylic rubber. Thus, it is possible to use an inexpensive and commonly used reinforcing layer of PET yarns in this kind of hose.