CHLOROPRENE RUBBER COMPOSITION, AND VULCANIZATES AND MOLDINGS THEREOF

摘要

Provided are: a chloroprene rubber composition which has excellent low-temperature characteristics such as excellent low-temperature compression set and low-temperature dynamic characteristics and further exhibits excellent compression set, mechanical strength and processing characteristics even at high temperatures, thus ensuring excellent characteristics over a wide temperature range; and vulcanizates and moldings thereof. This chloroprene rubber composition can be obtained by: blending a chloroprene rubber that contains 5 to 20% by mass of 2,3-dichlorobutadiene units with a natural rubber at a chloroprene rubber/natural rubber mass ratio of 60/40 to 95/5; and then blending 100 parts by mass of the obtained rubber component with 0.1 to 3.0 parts by mass of ethylenethiourea and 0.1 to 3.0 parts by mass of dipentamethylenethiuram tetrasulfide.