Abstract:
1. SOLID PARTICULATE NITRONIUM PERCHLORATE HAVING AS AN INNER COATING CONTACTING THE SURFACE OF THE PARTICLES, A CONTINUOUS COATING SURROUNDING AND ENCAPSULATING SAID PARTICLE OF A SOLVENT-RESISTANT, MOISTURE-IMPERMEABLE LINEAR POLYMER HAVING THE REPEATING UNIT
-CH2-((Y)X-1,4-PHENYLENE)-CH2-
WHEREIN Y IS AN ELECTRON WITHDRAWING SUBSTITUENT GROUP HAVING A POSITIVE SIGMA PARA VALUE OF AT LEAST 0.20, X IS AN INTEGER FROM 1 TO 3, INCLUSIVE, AND THE SUM OF THE SIGMA PARA VALUE OF ALL OF THE SUBSTITUENT Y GROUPS IS AT LEAST 0.40.
Abstract:
Pellicles of para-xylylene polymers are used as the sole support media for masses of objects supported thereon. The supported objects can be combined with the pellicle either during the formation of the pellicle or after the pellicle has been manufactured. The composite article is used wherever it is desirable to provide a support media which has as little detrimental influence as possible on the intended function of the supported object.
Abstract:
PARA-XYLYLENE POLYMER COATED SUBSTRATES EXHIBITING STRONG POLYMER-SUBSTRATE INTERFACIAL BONDS ARE OBTAINED BY DEPOSITION COATING THE SUBSTRATES TO A PARA-XYLYLENE POLYMER THICKNESS OF UP TO ABOUT 5 MICRONS AND THEREAFTER MAINTAINING THE COATED SUBSTRATE AT A TEMPERATURE OF FROM 100 TO 200*C. FOR AT LEAST 0.25 HOUR.