Kodar

Most polyesters (qv) are based on phthalates. They are referred to as aromatic-aHphatic or aromatic according to the copolymerized diol. Thus poly(ethylene terephthalate) [25038-59-9] (PET), poly(butyelene terephthalate) [24968-12-5] (PBT), and related polymers are termed aromatic-aHphatic polyester resins, whereas poly(bisphenol A phthalate)s are called aromatic polyester resins or polyarylates PET and PBT resins are the largest volume aromatic-aHphatic products. Other aromatic-aHphatic polyesters (65) include Eastman Kodak s Kodar resin, which is a PET resin modified with isophthalate and dimethylolcyclohexane. Polyarylate resins are lower volume specialty resins for high temperature (HDT) end uses (see HeaT-RESISTANT POLYAffiRS). 

Fibres are also available from poly-(l,4-cyclohexylenedimethylene terephthalate) and are marketed as Kodar (Kodak) and Vestan (Hills). 

The copolyester was first marketed as Tenite Polyterephthalate 7DRO but is now sold as Kodar PETG. 

A similar product is Kodar PETG 6703 in which one acid (terephthalic acid) is reacted with a mixture of glycols (ethylene glycol and 1,4-cyclohexylene glycol). A related glass-reinforced grade (Ektar PCTG) has also been offered. 

Amite, Celanex, Corterra, Crastine, Eastar, Glass Polymer, Grilpet, Hostadur, Kodar, Orgater, Petlon, Pocan, Riteflex, Rynite, Techster, Thermx, Tribit, Ultradur, Valox, Vandar, Vestodur. 

It is worthwhile to discuss another interesting aspect of dye diffusion into polymer which is governed by polymer morphology. When the bit sizes marked with Disperse Blue 60 film are compared, relatively large systematic differences are observed between bits marked on Mylar (from Dupont) and on Kodar (from Kodak) substrates. The sizes of the bits obtained on Kodar substrate are substantially smaller (by a factor of up to 2) than the ones obtained on Mylar under the same conditions. Figure 7 shows the dependence of bit size marked... 

Figure 7. The dependence of Disperse Blue dye, mark-size on laser exposure time on Mylar and Kodar substrates.

Almost simultaneously in 1883 Fittig and Kodar in Germany and Perkin in England prepared the ester of cyclopropane 1,1 diacid by the action of ethylene dlbromlde on sodium malonic ester the former published 1. Z., 05,1,1703. "... 

LAPIS NON LAPIS — The Stone which is not a stone is a substance which is petrine as regards its efficacy and virtue but not as regards its substance. According, however, to Avicenna and Kodar, the Stone which is not a stone is the Elixir, and is called the Stone because it is tinged 6r coloured, and not a stone for the reason that it is melted. 

Hexane 23 1 6 7.53 97 87.3 130 clMT aepnarenct nlelnM Easimari Kodar 5445 0.25 mm film... 

Methylene Chloride 23 1 0 couk) not saparala 1or lost Easiman Kodar 5445 0.25 mm Him... 

Brahe Fluids 23 365 2 5.9 6.3 surlace atleck, yellowed Easlman Kodar 6763 3.2 mm Ihick... 

Carbon Tetrachloride 23 365 27 16 discolored, swollen Easlman Kodar 6763 3.3 mm Ihick... 

Detergents Alconox 0.25 23 365 G <1 <1 slight yellowing Eastman Kodar 6763 32 mm thick... 

Diesel Fuels 23 365 G cl 2 discolored Eastman Kodar 6763 3 3 mm thick... 

G5 6 <1 sligM yellowing, crai g Eastman Kodar 6763 3.2 mm ihick... 

Mineral Oils 23 365 6 -cl <1 alight yefloKing Eastman Kodar 6763 3.2 mm thick... 

Table 25.9 Typical properties of the copolyester Kodar PETG...

---