Accession Number : AD0063963


Title :   Research on Heat-Resistant Acrylate-Siloxane Elastomers


Descriptive Note : Technical rept. 8 Jun-15 Aug 1954


Corporate Author : BJORKSTEN RESEARCH LAB INC MADISON WI


Personal Author(s) : COX, ROBERT P ; BUETOW, RALPH W ; YAEGER, LUTHER L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/063963.pdf


Report Date : Feb 1955


Pagination or Media Count : 60


Abstract : The objective of this project was the synthesis of acrylate-siloxane elastomers with good thermal and solvent resistance. Of the many polymers investigated as gum rubber bases, vinyl triethoxy-silane-acrylonitrile, ethyl acrylate compositions were the best as measured by (1) swelling in 70-30 iso-octane-toluene and in Penola oil and (2) weight loss and flexibility after heating in air at 350 F. The addition of either dibutyl phosphite or polychlorotrifluoro ethylene powder (Kel F) to these gum rubbers generally maintained their flexibility in air at 350 F. for 250 to 1000 hours. As a reinforcing filler to provide good tensile strength. carbon black (Philblack O) was superior to other fillers tested. Trimene Base was effective as a vulcanization accelerator throughout this work. The vinyl triethoxysilane-ethyl acrylate gum rubbers could be vulcanized without additives through the formation of cross-linkages. Cross-linking probably took place through adjacent SiOH groups formed in emulsion polymerization.


Descriptors :   *ELASTOMERS , *WAVEGUIDES , *HEAT RESISTANT PLASTICS , TEMPERATURE , TENSILE STRENGTH , POLYMERIZATION , SYNTHESIS(CHEMISTRY) , SILOXANES , CROSSLINKING(CHEMISTRY) , ADDITIVES , ACRYLATES , CARBON BLACK , REINFORCING MATERIALS , THERMAL RESISTANCE , VULCANIZATION


Subject Categories : Elastomers and Rubber


Distribution Statement : APPROVED FOR PUBLIC RELEASE