OXYDIETHYLENE

Hie most representative member of this class of polyesters is the low-molar-mass (M 1000-3000) hydroxy-terminated aliphatic poly(2,2/-oxydiethylene adipate) obtained by esterification between adipic acid and diethylene glycol. This oligomer is used as a macromonomer in the synthesis of polyurethane elastomers and flexible foams by reaction with diisocyanates (see Chapter 5). Hydroxy-terminated poly(f -caprolactonc) and copolyesters of various diols or polyols and diacids, such as o-phthalic acid or hydroxy acids, broaden the range of properties and applications of polyester polyols. 

Due to the high reaction temperatures required during the last stages of these syntheses, side reactions cannot be avoided. Acetaldehyde, carboxyl endgroups, and vinyl endgroups are formed during PET and PEN synthesis. The formation of 2,2/-oxydiethylene moieties in polymer chains by etherification of hydroxyl endgroups is also a well-known side reaction of EG polyester syntheses.264 These reactions should be carefully controlled since they can exert an important influence on polymer properties such as Ts, mechanical properties, hydrolytic stability, and discoloration. 

Poly f p-oxybenzoyl-co-p-phenylene isophthalate]), 113-114 Poly(2,2 -oxydiethylene adipate), 29 Polyoxymethylene glycol, aqueous, 377 Poly(oxytetramethylene) (PTMO), 53 Poly (p-pheny lene). See also Poly(para-phenylene)s dendronized, 520-521 synthesis of, 491-494 synthesis of water-soluble, 493 Poly(phenylene ether sulfone) chains,... 

A 1 1 aquo complex was prepared with the chiral crown 1,3 1, 3 4,6 4, 6 -tetra-0-methylene-2,2 5,5 -bis-0-oxydiethylene-di-D-mannitol (9). In the crystal the host molecule has C2 symmetry, and the hydrogen bonded water guest molecule lies on the twofold axis. The oxygen atom of the water sits above the crown and is hydrogen bonded (H -O = 1.96 A) to two ether linkages adjacent to the six-membered rings. 

A TG-DTA study of the thermochemical processes occurring at vulcanisation temperatures with N-oxydiethylene-2-benzthiazyl sulphenamide and N-cyclohexyl-2-benzthiazyl sulphenamide and their mixtures with sulphur showed the formation of high molecular weight polysulphides [73]. The influence of metallic oxides (Fe203, Sn02) on hot air ageing of one-pack room temperature vulcanised fluorosilicone rubber has been studied by means of TG-DTA [74, 75]. TG-DTA and TG were both applied to study the thermal characteristics of room temperature vulcanised silicone rubber [76]. 

Synthesis of l,l, 4,4 -tetra-0-benzyl-2,2 3,3 -bis-0-oxydiethylene-di-L-threitol, a chiral crown ether... 

SYNS AMAX 2-BENZOTHIAZOLYLSULFENYL MORPHOUNE 4-(2-BENZOTHIAZOLYLTHIO)-MORPHOLINE 2-(MORPHOUNOTHIO)-BENZOTHIAZOLE MORPHOUNTYLMERCAPTO-BENZOTHIAZOLE 2-(4-MORPHOLINYLTHIO)-BENZOTHIAZOLE N-(OXYDIETHYLENE)-BENZOTHIAZOLE-2-SULFEN-AM1DE SANTOCURE MOR SULFENAMIDE M USAF CY-7 VULCAFOR BSM... 

FORMIC ACID, CHLORO-, OXYDIETHYLENE ESTER see OPOOOO... 

N-(OXYDIETHYLENE)BENZOTHIAZOLE-2-SULFENAJVHDE see BDGOOO OXYDIETHYLENE BIS(CHLOROFORMATE) see OPOOOO... 

A larger amount of sulfur added to natural rubber (20-30%) generates a different product, vulcanite. Besides sulfur, during the vulcanization process other chemical compounds are commonly added to rubber. One group of such compounds consists of vulcanization accelerators (A in the previous scheme). Substances such as diphenylguanidine, mercaptobenzothiazole, tetramethythiuram disulfide, N-oxydiethylene-2-benzothiazolylsulfenamide, and cyclohexylbenzothiazolylsulfenamide are utilized as accelerators. 

Sulfenamides, made from 170, by reactions involving primary and secondary amines under oxidizing conditions, include A-cyclohexyl-2-benzothiazole sulfenamide (173) and N-oxydiethylene-2-bcnzolhiazolc sulfenamide (2-(morpholinothio)benzothiazole) (174). Sulfenamides release 2-mercapto accelerators and amine during vulcanization. The amine is a secondary accelerator that brings about fast vulcanization after a slow start. Applications include in tyres and conveyor belts. They are not applicable to hot-air vulcanization processes95. 

In the photoinitiated polymerisation of Jl-vinylpyrrolidinone and N-vinylcaprolactam in dioxane and ethanol, the rate was higher in the latter solvent and monomerlO. This was attributed to the influence of the two additional methylene groups in the caprolactam ring which increases monomer reactivity. Other interesting effects have included the radiation dose on the photopolymerisation of diallyl oxydiethylene dicarbonate O. Here long lived radicals were produced which continue to react in the dark. The rate appears to fit a relaxation model that considers double bonds as traps with increasing lifetimes that are able to transfer to radical sites. 

OBTS. [Akrochem] N-Oxydiethylene-2-benzothiazole sulfenami primary accelerator for natural, SBR, nitrile, and other general-purpose rubbers. 

Beilstein Handbook Reference) AI3-26267 BRN 1812829 Carbonochloridic acid, oxydi-2,1-ethanediyl ester Diethylene glycol, bischloroformate Diethylene glycol chloroformate Diglycol chlorformate Diglycol chloroformate EINECS 203430-9 Formic acid, chloro-, diester with diethylene glycol (6CI) Formic acid, chloro-, oxydiethylene ester HSDB 5374 NSC 2346 Oxydiethylene bis(chlotoformate) Oxydiethylene chloro-formate Oxydiethylenebis(chloroformate). 

Morpholinothio)thioxomethyl)morpholine olinothiooarbonyl)thio)morpholine OTOS thiocarbamyl-N -oxydiethylene sulfenamide. 

Diethylene glycol dimethacrylate Oxydiethylene methacrylate C12H18O5 2368-84-1 242.268 >200 160 1.0821 1.4671 ... 

CAS 4074-88-8 EINECS/ELINCS 223-791-6 Synonyms Acrylic acid 2-etho) hanol diester Acrylic acid, or iethylene ester DEGDA Diactylate diethylene glycol Diethylene glycol acrylate Oxydiethylene acrylate Oxydiethylene diacrylate PEG-2 diacrylate 2-Propenoic acid, o) di-2,1-ethanediyl ester TGA 2 Classification Nonaromatic ester Empirical C10H14O5... 

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