Accession Number : AD0624744

Title :   IMPROVEMENT IN COMPRESSION SET RESISTANCE OF ELASTOMERIC VULCANIZATES USING CADMIUM OXIDE.

Descriptive Note : Technical rept.,

Corporate Author : ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIV

Personal Author(s) : Bergstrom,E. W.

Report Date : NOV 1965

Pagination or Media Count : 22

Abstract : Cadmium oxide (CdO) was evaluated in numerous elastomeric vulcanizates as an additive for improving compression set resistance. It was found to be effective in certain SBR, NBR and carboxylic rubber vulcanizates, significantly lowering compression set and allowing shorter cure times to be used. The compression set of a sulfur-Altax cured NBR vulcanizate, for example, was reduced by as much as 50% (% change from value found for same compound without CdO) and cure times as short as 5 or 10 minutes at 292, 307 and 320F could be used. Sulfur-accelerator cured SBR and NBR vulcanizates containing CdO were found to be somewhat less scorch resistant than the same vulcanizates without CdO but were not as scorchy as certain nonelemental sulfur cured vulcanizates. (Author)

Descriptors :   (*VULCANIZATES, CADMIUM COMPOUNDS), (*CADMIUM COMPOUNDS, OXIDES), (*ADDITIVES, CADMIUM), ELASTOMERS, COMPRESSIVE PROPERTIES, AGING(MATERIALS), SULFUR, PHYSICAL PROPERTIES, SYNTHETIC RUBBER

Subject Categories : Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE