Chlorinated polyether properties

Consideration of the figures given in Table 19.7 shows that the physical properties of the chlorinated polyethers are not particularly outstanding when compared with other plastics materials. On the other hand, apart from a somewhat low impact strength, these figures reveal no particular limitation. 

Flame resistance The underwriters ruling on the use of self-extinguishing plastics for contact-carrying members and many other components introduces critical material selection problems. All TSs are basically self-extinguishing. Nylon, polyphenylene oxide, polysulfone, polycarbonate, vinyl, chlorinated polyether, chlorotrifluoroethy-lene, vinylidene fluoride, and fluorocarbon are examples of TPs that may be suitable for applications requiring self-extinguishing properties. Cellulose acetate and ABS are also available with these properties. Glass reinforcement improves these materials considerably. 

Pentaerythritol is used as a raw material for the explosive known as pentaerythritol tetranitrate (PETN). The most important end-use of pentaerythritol is in the manufacture of alkyd resins, in competition with glycerol. Due to its higher alcohol functionality, pentaerythritol gives alkyds somewhat better properties over glycerol. Other important end-uses include pentaerythritol resin esters used as floor-polish, fire-retardant, high pressure lubricants. Pentaerythritol is also used to produce chlorinated polyethers by the following reactions ... 

The thermoplastics used for corrosion resistance are fluorocarbons, acrylics, nylon, chlorinated polyether, polyethylenes, polypropylenes, polystyrence, and poly (vinyl chloride) important thermosetters used in this field are epoxies, phenolics, polyesters, sflicones, and ureas. AH plastics show useful physical properties. One drawback in the use of plastics is their limited tolerance to temperature. Fluorocarbons are the noble metals of plastics they are corrosion resistant to practicaHy all environments up to 290 C. 

Figure 6-61. Heat-resistance properties of resins retaining 50 percent of properties obtainable at room temperature with resin exposure and testing at elevated temperature. Zone 1 Acrylics, cellulose esters, LDPE, PS, PVC, SAN, SBR, UF, etc. Zone 2 Acetals, ABS, chlorinated polyether, ethyl cellulose, EVA, ionomer, PA, PC, HDPE, PET, PP, PVC, PUR, etc. Zone 3 PCTFE, PVDF, etc. Zone 4 Alkyds, fluorinated ethylene-propylene, MF, polysulfone, etc. Zone 5 TS acrylic, DAP, epoxy, PF, TS polyester, PTFE, etc. Zone 6 Parylene, polybenzimidazole, silicone, etc. Zone 7 PAI, PI, etc. Zone 8 Plastics in R D etc. Since plastics compounding is rather extensive, certain basic resins can be modified to meet different heat-resistance properties.

The fluorination of chlorine-containing polyethers has given rise to a new class of materials that exhibit outstanding properties. For example, telomers of epichlorohydrin can be fluorinated to give perfluoropolyepichlorohydrin, (—CF2C(F)(CF2C1)0—) .47... 

Chem. Descrip. Polyether siloxane Uses Internal leveling agent for aq. wax dispersions Properties Sol. in water, alcohol, aromatics, chlorinated hydrocarbons surf. tens. 30 mN/m (0.1% water) mean cloud pt. 38 C TEGOPREN 3110 [Evonik Goldschmidt GmbH]... 

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