Siloxanes solvent resistance

The presence of carbon—fluorine bonds in organic polymers is known to characteristically impart polymer stabiUty and solvent resistance. The poly(fluorosibcones) are siloxane polymers with fluorinated organic substituents bonded to siUcon. Poly(fluorosibcones) have unique appHcations resulting from the combination provided by fluorine substitution into a siloxane polymer stmcture (see Silicon compounds, silicones). 

EP 323142 (European) 1989 Ternary polyether ketone blend wire insulations Pirelli General PLC, UK CK Alesbury, RJ Murphy Formulation shows excellent stress craze resistance, flexibility and flame resistance Blends of polyarylene ether ketones, polyether imides and polyfimide siloxanes) were coated onto wire for solvent resistance, O index and abrasion resistance. Blends without siloxane-imide copolymer did not meet these properties... 

These Deloxan beads have an inert siloxane matrix which is advantageous over other adsorbents such as activated carbon or organic polymer-based resins and fibers because (1) valuable API product is not adsorbed and lost as is the case when activated carbons are used and (2) they are chemically resistant to most solvents and stable over a wide pH range (0-12). 

Elastomers based on fluorinated polyurethanes exhibit good mechanical properties and resistance to solvents, chemicals, cold, and heat.54 Formulations for fluoroure-thane elastomers are frequently modified with siloxanes to optimize certain properties.55 FEVE-based polyols are used to manufacture elastomeric automobile bumpers and interior trim components.56... 

Cyclic siloxane compounds containing an aliphatic unsaturation component and fluorinated alkyl groups were prepared in a two-step process with overall yields >53%. These polymerizable agents are characterized as having water and oil repellency in addition to weather, solvent, and chemical resistance. 

Tego Glide. [Tego] Siloxane cq ly-mers mar resistant and flow additive for water and solvent-based paints, printing inks deaerator for epoxy resins. 

Polysiloxanes, [-O-Si(RR )-], are linear resins that can be branched or crosslinked into elastomers. They have high compressibility, permeability to gases, low T and viscosity, exceptional weather-ability, low surface tension coefficient and are relatively expensive. Siloxane polymers or copolymers have been incorporated into engineering or specialty resins to improve processability, toughness, HDT, solvent and weather resistance. 

PPE Blends PPE, PS, and PDPS PPE-g-siloxane, and SEES Poly(bisphenol-A dimethyl-siloxane) with PPE, PAr, PI, PEST or PC PArSi with PPE and SBS clear, transparent, colorless solids at 65°C enhanced solvent and impact resistance HDT, reduced melt viscosity flame retardancy Boldebuck, 1962 Brown, 1989 Herrmann-Schoenherr 1993, 1994 Jordan Webb, 1994... 

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