Silicone polyethylene glycol

Antistreak, antifog polymers Silanes, ethoxylated silicones, polyethylene glycol, polyvinyl alcohols 0-1... 

Apiezon L OV101 OV17 Carbowax20M Branched-chain alkane grease Dimethyl silicone 50% Phenyidimethyl silicone Polyethylene glycol Nonpolar Nonpolar Medium polarity Very polar... 

A broad range of silicone surfactants are commercially available, representing all of the structural classes—anionic, non-ionic, cationic, and amphoteric. The silicone moiety is lyophobic, i.e. lacking an affinity for a medium, and surfactant properties are achieved by substitution of lyophilic groups to this backbone. The most common functionalities used are polyethylene glycols however, a broad range exist, as shown in Table 2.8.1 [2,3]. 

Non-ionic silicone surfactants such as M2D-C3-0-(E0)n-CH3 (1), are thus detectable by API-MS methods as adducts with NH4, Na+ and K+ cations as shown in Fig. 2.8.3 [29]. Minor [M + H]+ adducts for M2D-C3-0-(E0)n-H (2) have been observed, although, in the case of M2D-C3-0-(E0)n-CH3 these were not detected even with the addition of acidic media. Only singly charged species of M2D-C3-0-(EO) —Me (n 3-16) were observed for all cone voltages [29], as is consistent with that expected for the polyethylene glycol (PEG) oligomeric distribution [37,38],... 

Second, dead lambs were smeared with neatsfoot oil (an oil obtained by boiling feet and leg bones of cattle), left with the mother for 2-18 hours and then substituted by neatsfoot oil-treated foster lambs. Here 91% were accepted. The best acceptance rate (100%), however, was achieved by draping the skin of the dead lamb over the alien one. This is the method of choice because it is not only most effective but also saves labor as no treatment is necessaiy (Alexander eta/., 1987). Ewes accept alien lambs if they are rubbed with non-polar oils such as white soft paraffin or liquid paraffin. Polar materials such as polyethylene glycol, glycerol silicone, or diisooctyl phthalate have no effect. Ewes appear to use non-polar volatiles for discrimination (Alexander etal., 1989). 

Fleissman et al. (4) prepared glossy cosmetics consisting of silicone-containing polyurethanes by condensing bis-polyethylene glycol dimethicone-polypropy-lene glycol with isophorone diisocyanate. 

Figure 2.7—Structure of polysiloxanes (silicones) and polyethylene glycols. An inventory of all the compositions of these phases that can be used for impregnation or bonding would be lengthy. The surface of the silica column can be treated with tetradimethylsiloxane in order to obtain the bound phase, which is polymerised and then cross-linked.

Aldehydes and ketones are polar compounds that can be separated on a polar or an intermediate polar column. Polyethylene glycol (PEG)-type phase, such as Carbowax 20 M, Supelcowax 10, VOCOL, DBWax, or equivalent are suitable for the purpose. Compounds may also be separated according to their boiling points on a nonpolar column. A 60 m long, 0.53 mm ID and 1 pm film or other appropriate dimension methyl silicone capillary columns, such as SPB-1, DB-1, or DB-5. 

Sharma, S., Johnson, R.W., Desai, T.A., Evaluation of the stability of nonfouling ultrathin polyethylene glycol) films for silicon-based microdevices. Langmuir 2004, 20, 348-358. 

Tarka Trandolapril/ verapamil HC1 1 mg/240 mg 2mg/180mg 2 mg/240 mg 4 mg/240 mg Extended release tablet Hypertension ACE inhibitor Com starch, dioctyl sodium sulfosuccinate, ethanol, HPC, HPMC, lactose, magnesium stearate, MCC, polyethylene glycol, povidone, purified water, silicon dioxide, sodium alginate, sodium stearyl fumarate, talc, sytnetic iron oxides, titanium dioxide Abbott Laboratories... 

Figure 3.2 Fundamental linear relationship between retention and temperature in GLC according to eqn.(3.10b). Stationary phases (a) SE-30 (silicone oil) and (b) Carbowax 20M (polyethylene-glycol). Solutes n-alkanes (number of carbon atoms as indicated in the figure). Figure taken from ref. [302], Reprinted with permission.

Allyl polyethylene glycol ethers Non ionic Used to produce surface active, water-soluble silicone ethers (antifoams) ... 

Polyethylene glycol Polyethylene oxide Poly(dimethyl silicone)... 

To illustrate the general behavior, we consider an emulsion comprised of 2.5 wt % of 350 mPa s silicone oil dispersed in an aqueous phase. This latter contains 3 wt % of non-ionic surfactant (commercial mixture of polyethylene glycol C10E5 and... 

Gas Chromatographic Columns. Two heat-resistant glass columns, A and B, % inch nominal o.d. (1.5 mm. i.d., 3 mm. o.d.) and 5 feet long, are used. Column A is packed with 60-70 mesh acid-washed Chromosorb G, coated by weight with 0.15% Carbowax 20M (a polyethylene glycol) and with 1.5% DC 200 (12,500 centistokes) silicone fluid Column B is packed with 60-70 mesh acid-washed Chromosorb G, coated by weight with 0.10% Carbowax 20M and with 1.0% QF-1 fluorosilicone (also called FS 1265). 

---