Accession Number : AD0624544

Title :   SIB POLYMER DEVELOPMENT.

Descriptive Note : Quarterly rept. no. 3, 1 Aug-31 Oct 65,

Corporate Author : OLIN MATHIESON CHEMICAL CORP NEW HAVEN CONN CHEMICALS DIV

Personal Author(s) : Schroeder,H. A. ; Schaffling,O. G.

Report Date : 19 NOV 1965

Pagination or Media Count : 28

Abstract : Further studies with the recently discovered 'offratio' SiB-2 rubber confirmed that it is possible to make a SiB elastomer with 1,000 to 1,200 pounds tensile strength, although this species leaves something to be desired in heat resistance. A particularly interesting SiB representative was included in our investigation since the last report. Chemically it is a phenyl substituted SiB-4 polymer which can be obtained not only in the usual rubbery form but also as a viscous stock. Vulcanizates from this latter material exhibit outstanding heat-aging resistance surpassing the performance of any rubber we have seen so far. In addition, it was found to be still flexible as -80F, thus indicating a wide range of elasticity. The investigation of antioxidants such as ferric oxide, tungsten oxide and ferrocene was intensified. The two oxides, especially, impart noteworthy resistance to deterioration of the polymers at elevated temperatures.

Descriptors :   (*BORON COMPOUNDS, SILOXANES), (*SILOXANES, BORON COMPOUNDS), (*POLYMERS, SILOXANES), (*ELASTOMERS, HEAT RESISTANT MATERIALS), ANTIOXIDANTS, VULCANIZATES, TENSILE PROPERTIES, AGING(MATERIALS), ADDITIVES, ELONGATION, HARDNESS

Subject Categories : Polymer Chemistry
      Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE