Santoprene

Product Vistaflex RepubHc AB 6053" Telcar 302 Santoprene Trefsin 3201-60... 

There are five types of thermoplastic rubbers currently available. These are based on (i) Olefinics (e.g. Alcryn, Santoprene) (ii) Polyiuethanes (e.g. Elas-tollan, Caprolan, Pellethane) (iii) Polyesters (e.g. Hytrel, Amitel) (iv) Styrenics (e.g. Solprene, Cariftex) and (v) Polyamides (e.g. Pebax, Dinyl) Some typical properties are given in Table 1.4. 

Thermoplastic Advanced Elastomer Santoprene, Geolast, Vyram,... 

Properties Test Method Styrenic Elexar 8421 COPE Hytrel 4056 TPU Texin 480AR TPA Estamid 90A TPO TPR 1600 EA, Two Phase, Santoprene 101-73/201-73 EA, Single Phase, Alcryn R12028-80A... 

Hifax MXL, Santoprene, Sarlink 3000 and 4000, Uniprene. Sarlink 2000, Trefsin. 

Santoprene PP dynamic vulcanizate with nitrile rubber AES... 

Santoprene extracts contained higher concentrations of inorganic carbon and little, if any, extractable silicon. On the other hand, the amount of silicone in extracts of silicone polymers was very high. From Table 37, it is possible to see that these materials, though all made of silicone, are very different each other. While about lOOpg/g Si was found in the aqueous extract from sample 1, no measurable Si was detected in the same extracts from samples 2 and 6. As could be expected, silicone extract-ables were much higher in ethanolic extracts, being that 739 pg/g Si from sample 6 was the lowest amount leached. 

Results of Santoprene extracts are quite different from those of silicone. GC-MS chromatograms for water extracts of Santoprene tubing show peaks associated with C8 and C9 acids, phthalates, and other organic substances. Figure 15 shows the GC-MS chromatograms of static ethanol extracts of Santoprene tubing materials, and Table 38 lists the compounds identified in Figure 14, based on matches of MS spectrum peaks. 

FIGURE 15 GC-MS chromatograms of the static ethanol extracts of Santoprene tubing materials (underivatized). The chromatograms from these two Santoprene materials were quite different from those of the silicone materials (Figure 14). IS = internal standard (dimethyl phthalate). See Table 39 for the tentative peak identifications. Only those peaks with recorded spectral library matches are noted for each sample, although retention times and patterns may suggest some additional peak identifications [78]. 

TABLE 38 Peak Identification in Ethanol Extracts of Santoprene Tubing Samples 7 and 8... 

Santoprene 201-55 121274-00-8 Sodium Chloride Sulfate 129195-70-6 Sodium Stannate 12058-66-1... 

Ammonium Bromide Ammonium Bisulfide Ammonium Hydrosulfide Ammonium Fluoride Ammonium Chloride Sal Ammoniac Santoprene 101-55 Santoprene 101-64 Santoprene 101-73 Santoprene 201-55 Santoprene 203-50 Calcium Hydrosulfide Ammonium Sulfide Potash Potassium Stannate Cumaldehyde Diphenylamine Amyl Cinnamaldehyde Phenoxyacetic Acid Diethylhexyl Sebacate (2-) Bis(2-Ethylhexyl) Sebacate Dioctyl Sebacate Phenyl Acetate Phenoxyethanol (2-) Ethylene Glycol Phenyl Ether Arcel... 

Iodine Potassium Iodide Dodecylbenzene Tridecyibenzene Hydroquinone Propionaldehyde Methylform amide Diacetone Alcohol Isoamyl Alcohol Pentanedione (2,4-) Acetylacetone Paraldehyde Butylaldehyde Butyraldehyde Levulinic Acid Dioctyl Adipate Acetic Acid Butyl Ester Butyl Acetate Dioxane (1,4-) Dioxane Dioxane (p-) Isoamyl Acetate Thiodiacetic Acid Butyl Stearate Santoprene 201-73 Kamax T-260 Adipic Acid Ethylene Chloroformate Caprylic Acid Octanoic Acid Hexamethylenediamine Butyl Carbitol Acetate Decane Carbon Dioxide Dimethylamine Sodium Methylate Freon 114B2 Tetrachloropentane Santicizer 141 Santoprene 201-64 Ecolan Hetron 99P Calcium Hydride Triton Sulfolane Tributyl Phosphate Tributylphosphate Sodium Diacetate Methacrylonitrile... 

Recently developed thermoplastic rubbers (e.g., Santoprene developed by Monsanto) are taking over some of the market niches, which were formerly reserved for vulcanized (cross-linked) rubbers [34]. Not only does this material lend itself to convenient processing like a thermoplastic, but once an item made from a thermoplastic rubber has outlived its usefulness it can be much more readily reprocessed. However, thermoplastic elastomers generally have lower strength, less abrasion resistance, and lower tolerance to high temperatures than vulcanized rubber so these materials will only encroach on conventional rubber applications in areas where these properties are less important. 

Santoprene . [Advanced Elastomer Systems] Thenntqrlastic rubber. 

---