Bisphenol phenoxy resins

Since poly(oxy-2,6-dimethy1-1,4-phenylene) has exhibited a high tendency to undergo cleavage, rearrangements and to crosslink in the presence of electrophilic reagents,21 our attention has been focused on modification of poly(arylene ether sulfone), 1, and phenoxy resin,4 The active sites in these polymers are the 3-positions of the bisphenol-A repeating units. We will report the extent of... 

Crystallization behavior in miscible blends containing crystallizable components has been extensively studied [174-180]. Generally, when a crystallizable component is mixed with an amorphous component its melting temperature goes down and its crystallinity lowers. The same trend has been reported for blends with intercomponent hydrogen bonding such as PCL/STVPh [181], PCL/poly(hydroxyl ether of bisphenol A) [182] and phenoxy resin/PEO [183]. 

An interesting approach to maleimide-terminated phenoxy resin has recently has described (42). para-Maleimidobenzoic acid was reacted with diglyci-dylbisphenol-A epoxy resin in the presence of catalyst to provide the bismale-imide of Fig. 13. Instead of diglycidyl bisphenol-A, linear epoxy resin pre-polymers can be used in this reaction to form a maleimide terminated phenoxy resin. Another suitable functionalized monomaleimide is m- or p- N-(hydroxyphenyl) maleimide which is synthesized from maleic anhydride and m-aminophenol in DMF as a solvent at 70 °C. The purified hydroxyphenyl maleimide was reacted with epoxy resin to form novel BMIs as outlined in Fig. 14. The new BMI and phenoxy oligomers polymerize at temperatures of 200-220 °C, but the cure temperatures can be significantly lowered when catalysts such as imidazoles or triphenylphosphine are added. The cured homopolymers show Tg of 140 and 230 °C for the n = 2 and the n = 1 polymer, respectively(43). 

A polymer having the bisphenol-A backbone structure is called a phenoxy resin. Its chemical structure is as follows ... 

The differences in miscibility between the PET/xPHB material and various materials - particularly polar ones - are clearly complex, with both chain polarity and flexibility playing a role. This can be illustrated by considering miscibility differences between PC, PAR (both previously discussed) and phenoxy resin (the polyhydroxyether of bisphenol-A) (PR) with the homopolymer structures and glass transitions being... 

Phenoxy resins are produced from bisphenols and epichlorohydrins in the presence of alkali. The initially formed phenolate ion adds on epichloro-hydrin and the alkoxide ion reacts further with chain extension ... 

Phenoxy resin (polyhdroxyether) n. Any linear thermoplastic resin made by reacting an exact equivalent of epichlorohydrin with bisphenol A and sodium hydroxide in dimethyl sulfoxide. 

There have been several studies of interactions between PCL and phenoxy resin, a polymer prepared from bisphenol-A and epichlorhydrin, and several estimates of the interaction parameter have been made see Sect. 16. Harris et al. estimated a value for B (Eq. 8) of -10.1 J cm from group contributions and attributed this to a favourable interaction between the -OH of phenoxy and the carbonyl groups of PCL, counteracted by other interactions [83]. De Juana et al. [84] used inverse gas chromatography and fovmd values of B between -4.8 and -16.1 J cm, depending on composition, temperature and method of estimation. Coleman and Moskala [85],in FTIR studies, identified a peak for carbonyl... 

Bisphenol-A and epichlorohydrin can be copolymerised to form a regular polymer with the structure 17 known as the poly(hydroxy ether of bisphenol-A) or, more generally, as phenoxy. Phenoxy resin has the same aromatic unit as bisphe-nol-A polycarbonate but, as far as interactions are concerned, the carbonate residue is replaced by an ether linkage and a hydroxyl group the latter is possibly capable of useful interactions. 

Ph noxy Resins. Phenoxy resins are thermoplastic polymers derived from bisphenol A and epichlorohydrin. Their weight-average molecular weights (Mw) are higher (ie, >30,000) than those of conventional SERs (ie, 25,000 maximum). They lack terminal epoxides but have the same repeat imit as SERs and are classified as polyols or polyhydroxy ethers ... 

Various polyesters such as poly (butylene terephthalate) have also been shown to be compatible with bisphenol A phenoxy resin. The suggested specific interaction here is between the hydroxyl of the phenoxy resin and the ester carbonyl. A wide range of polyesters have, however, also been found to be compatible with polycarbonates," where no hydroxyl groups are present. One might therefore consider that some interaction with the aromatic ring should be invoked of the sort that has been presumed to exist in the compatible pair, polystyrene-poly(vinyl methyl ether). A notable exception to the compatibility exhibited above is poly(pivalolactone) where the methyl groups might sterically hinder the interactions."... 

Polymeric products [117] are obtained when the mole ratio is less than 2 for the epichlorohydrin-bisphenol A reaction and a molecular weight of 1420 is reported at a mole ratio of 1.2 [118]. High molecular weight resins (30,000 or more) are known as phenoxy resins, and these thermoplastic resins are used for coatings, adhesives, and various molding applications. 

A recent publication describes a pragmatic approach for developing a thermosetting anisotropic conductive adhesive film to electrically connect a flexible circuit to ITO terminal pads [121], The basic components are a solid high molecular weight bisphenol-A diglycidyl ether, a liquid bisphenol-F diglycidyl ether, a phenoxy resin M = Tg = 94°C), (2,3-epoxypropyl)... 

Poly(bisphenol A-co- epiohlorohydrin) Bisphenol A epoxy resin phenoxy resin 25068-38-6 Phenol, 4,4 -( 1 -methylethylidene)-bis-, polder wth (chloro- methyl)oxirane R ... 

Acrylics Miscellaneous Cellulose esters Asphalt Polyamides Phenoxy resins Bisphenol-A polycarbonate Polysulfone... 

Phenol, 4,4 -isopropylidenedi- Pluracol 245 Propane, 2,2-bis(p-hydroxyphenyi)- Rikabanol Uoar bisphenol A Ucar bisphenol HP. intermediate in manufacture of epoxy, polycarbonate, phenoxy, polysulfone, polyester resins, flame retardant, rubber chemicals fungicide. Solid mp = 147.9° bpio 250° Am = 226, 248, 277 nm 15000,25900,1310, MeOH) insoluble in H2O soluble in organic solvents LD50 (rat orl) = 3250 mg/kg. Aristech Mitsui Petroleum Mitsui Toatsu Shell. 

Resin, Phenoxy Epichlorohydrin Bisphenol see Poly-(cis-1,4-isoprene) 631-... 

Other studies have been carried on TPU blending with other polymers, such as polyvinyl acetate (10-35%) [71], polyhydrooxyether of bisphenol-A (Phenoxy) [72], acrylic polymers [73-74], poly(4,4 -diphenylsulfone terephthalamide) (PSA) [75], and ionomers [76], or ionic groups in nonpolar resins acting as compatibilizers [77]. 

The diglycidylether of Bisphenol A (DGEBA) is where n = 0. With increasing n, the viscosity of the epoxy resin increased imtil it becomes a solid epoxy. At high molecular weight, the structure is basically the polyhydroxyether of Bisphenol A termed Phenoxy (PHE). Epoxidized novolacs (phenol-formaldehyde resins) are also employed in epoxy thermosetting systems. Epoxies are typically crosslinked with di- (or higher) amines (either aliphatic or aromatic). 

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