Polyether ester amide

Piping Low-density polyethylene, HDPE, crosslinked PE, ethylene-PP copolymer, polyester resins, polyether ester amide and PVDF... 

Polyether-ester-amide based elastomer Rubber replacement in pipes, tubes and moulded parts ... 

Muncu S (1980) Preparation of polyether ester amides, US Patent 4,345,064, to Ghemische Werke Huls AG. 

Shimosato S, Yamakawa H, and Kubo Y (1998) Elastic yarn of polyether ester amide elastomer, Japanese Patent 10008324, to Tosoh Corporation. 

Matsuo T (1986) Production of polyether ester amide elastomer, JP Patent 63 035,625, to Asahi Chemical Ind., Chem Abstr 109 151199. 

Youko F and Ghiaki T (1983) Hydrophilic polyether ester amide, JP Patent 60 063,225, to Toray Ind, Chem Abstr 103 38513. 

Foy P, Jungblut C and Deleens G (1974) Polyether-ester-amides as a product for molding or extrusion, FR Patent 2,273,021, to ATO Chimie, Chem A6sfr 84 136532 (in French). 

Tsai J H, Chiou J S and Twu Y K (1998) Manufacturing process of polyether-ester amide elastomer and elastic fiber, US Patent 5,917,000, Chem A6sfr 131 45914. 

Tanaka C, Hondo M and Yamamoto Y (1984) Polyether ester amides, JP Patent 60 170,624, to Toray Ind., Chem Abstr 104 19959... 

Block copolymers can contain crystalline or amorphous hard blocks. Examples of crystalline block copolymers are polyurethanes (e.g. B.F. Goodrich s Estane line), polyether esters (e.g. Dupont s Hytrel polymers), polyether amides (e.g. Atofina s Pebax grades). Polyurethanes have enjoyed limited utility due to their relatively low thermal stability use temperatures must be kept below 275°F, due to the reversibility of the urethane linkage. Recently, polyurethanes with stability at 350°F for nearly 100 h have been claimed [2]. Polyether esters and polyether amides have been explored for PSA applications where their heat and plasticizer resistance is a benefit [3]. However, the high price of these materials and their multiblock architecture have limited their use. All of these crystalline block copolymers consist of multiblocks with relatively short, amorphous, polyether or polyester mid-blocks. Consequently they can not be diluted as extensively with tackifiers and diluents as styrenic triblock copolymers. Thereby it is more difficult to obtain strong, yet soft adhesives — the primary goals of adding rubber to hot melts. 

The segmented polyamide elastomers are synthesized from MDI (4,4 -diisocyanato-diphenylmethane) and dicarboxylic acids and a carboxylic acid terminated aliphatic polyester, polycarbonate or polyether prepolymer with an average molecular weight of M = 500-5000. The dicarboxylic acids used as hard segment extenders are adipic and azelaic acid. Also, poly(ester amide) alloys are obtained using nylon-6,6 or polyesters (PEA/PBT). 

Important block copolymers include the styrene types (TPE-S), polyether esters (TPE-E), polyurethanes (TPE-U), and polyether amides (TPE-A). 

Uses Soft segment or extender in formation of elastomers such as thermoplastic urethanes, polyether esters, polyether amides, coatings, adhesives and sealants, casting resins, and urethane foams Features Resist, to microbial attack, low temp, flexibility and elasticity Properties APHA 50 max. liq. sol. in most org. solvs. and water m.w. 250 sp.gr. 0.991 (40 C) acid no. 0.05 hyd. no. 408.2-498.4 flash pt. 180C 0.03% water... 

The majority of the structures is prepared from AB2 monomers by polycondensation, to result in hb polyesters, polyamides, polyethers, poly(ester amide)s, polysulfones, poly(ether ketone)s, polyphenylenes (among others), and increasingly also by polyaddition leading to, for example, poly(carbosilane)s, poly(urea urethane)s, polyarylenes, poly(ether amide)s or polythioethers, and many others [6-11, 13, 17, 21]. In particular, cycloaddition reactions offer the advantage of an often very selective and clean, high-yield reaction that is not influenced by special functionalities [33]. The relatively easy synthesis of the hb polyphenylenes described by Mullen et al. [34]. is an excellent example of this. In addition, certain cycloaddition reactions form as Hnear units nonstable intermediates, which allows the preparation of hb polymers without any linear units, which therefore exhibit formally a DB of 100% [35]. 

The thermostability of these dianhydroalditol monomers may be higher than that of other aliphatic diols, which raises the Tg of the corresponding polymers. The most representative dianhydroalditol-based polymers that have been synthesized are polyesters, polycarbonates, polyethers, poly(ester carbonate)s, poly(ester anhydride)s, polyurethanes, polyureas, and poly(ester amide)s. 

Amide Urethanes Polyester Urethanes Polyether Ester Copolyether Polyester... 

Monomer(s) structure three groups of monomers are involved stiff units (e.g, phenyl, biphenyl, or naphthoic units), linking units (e.g., ether, ester, amide, etc.), and flexible spacer units (e.g., aliphatic or polyether chains) these monomers are used in Xydar terephthalic acid benzoic acid p,p -biphenol Rnk, J K, High Performance Polymers, William Andrew, 2008. 

TBA][L-Met], etc. with high yield and purity. Recently Morrissey et al. [91] synthesized oxygen-functionalized and amide ILs containing a wide range of ether and polyether esters in two steps followed by anion exchange (Scheme 20.2). 

The most important examples of thermoplastic elastomers include TPE-0 (polyolefin-based TPE), TPE-A (polyether(ester)-block-amide), TPE-E (copolyester-based TPE), TPE-S (styrene copolymer-based TPE), and TPU (polyurethane-based TPE). 

The best-known representative of the class of segmented polyether esters is the combination of polybutylene terephthalate as the hard component with polyether glycol as the soft component. The presence of polyether components causes a sensitivity to thermal-oxidative degradation in this class of materials. In non-stabilized form, these polymers cannot be processed. Their main oxidation product is formic acid. Moreover, re-formed monomers (terephthalic acid) of the polymer can collect on the surface and form a white, hard-to-remove deposit that changes the gloss level and color [512], Oxidative degradation reactions can be inhibited by primary and secondary antioxidants. Acidolysis caused by the formic acid can be controlled by adding acid acceptors that will bind either the precursor of formic acid, formaldehyde, or the acid itself. Acid amides, urethane, or urea are utilized as acid acceptors [86]. 

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