Polyesters modifiers

TXRF has also been used for the characterisation of single, colourless textile fibres (polyesters, modified cellulose and wool), yielding a fingerprint trace-element pattern, suitable for forensic purposes [276,277], Sample preparation involved dissolution/predigestion in HN03 and matrix removal (O2 cold plasma). 

P.R.122 baked 5% in full shade in polyester-modified silicone resin system 60 min, 200°C 60 min, 300°C 245xlO"10m 295xlO-10m... 

Although the scope of this review mainly covers CHDM-based polyesters modified with isophthalic acid or ethylene glycol (i.e. PCTA or PCTG, and PETG, respectively), many other copolyesters with interesting properties have been prepared with a variety of other comonomers. 

The properties of PCTA-type structures where the modifying acid is 1,4-cyclohexanedicarboxylic acid (CHDA) have also been studied [53], The incorporation of this diacid (95 % trans) as a polyester modifier maintains the toughness, but is accompanied with significant lowering of the Tg. This is contrasted to NDA modification where the Tg is enhanced but toughness is decreased. A comparison of the properties of various PCTAs versus an amorphous PCT sample, prepared by quenching, are shown in Table 7.5. 

K 3. Korolev, G. V., L. I. Makhonina, and A. A. Berlin Polymerisation in highly viscous media and crosslinking. I. Kinetic features of the polymerisation of some polyesters modified with acrylic acids. Polymer Sci. USSR 3, 62 (1962). 

Magnetic Properties. Insertion of the two metals into polyesters modified by mechanochemical polycondensation with ethylenediamine confers magnetic properties on the products. To prove this, ESR spectra... 

Manfredi, L. B., Rodriguez, E. S., Wladyka-Przybylak, M., and Vazquez, A. Thermal degradation and fire resistance of unsaturated polyester, modified acrylic resins and their composites with natural fibres, Polym. Degrad. Stabil. 2006, 91, 255-261. 

Polyester A resin formed by the reaction between a dibasic acid and a dihydroxy alcohol, both organic. Modification with multi-functional acids and/or bases and some unsaturated reactants permit crosslinking to thermosetting resins. Polyesters modified with fatty acids are called alkyds. 

Polyurethane Acrolon218HS Sherwin- Williams, Polyester modified acrylic polyurethane... 

Aromatic Polyester-Modified Foam. The formulations shown in Table 29 are examples of the co-use of an aromatic polyester and a... 

Polyester Adhesives used include neoprene or nitrile-phenolic, epoxy, epoxy-polyamide, phenolic-epoxies, polyesters, modified acrylics, cyanoacrylates, polyurethanes, butyl rubber, polyisobutylene, neoprene, and polymethylmethacrylate (1). 

Use For polyester modifiers, fast cure processes, and pigmentable systems. 

Polyesters modified with diimidodicarboxylic acids derived from aliphatic diamines and trimellitic anhydride have been patented, like methylene-N,N-bis-trimellitimide, made from hexamethylenetriamine [82], or the 1,4-dimeth-ylaminocyclohexane derivative [83]. The diacid obtained from trimellitimide, made from the anhydride and dry ammonia, complexed with a divalent metal, e.g., Zn, Co and others, is used in the preparation of a poly(ester-imide), described as giving a wire enamel with good flexibility on copper wire [84]. 

Appliance finishes have been formulated and tested by using acrylic or polyester modified urethanes that can cure to a suitable hardness in 10 min at 150 °F and cure to an ultimate hardness of 2H in 168 h (43). 

Alkyd resins have been defined as the reaction product of a polybasic acid and a polyhydric alcohol. This definition Includes polyester resins of which alkyds are a particular type. The specific definition that has gained wide acceptance is that alkyds are polyesters modified with monobasic fatty acids. In recent years, the term nonoil or oil-free alkyd has come into use to describe polyesters formed by the reaction of polybasic acids with polyhydric alcohols in non-stoichlometric amounts. These products are best described as functional saturated polyesters containing unreacted OH and/or COOH groups, and they are finding rapidly increasing uses in organic coatings. 

QO Poiymeg . [QO Ghent] Poly-tetramethylene ether glycol polyol used in urethane elastomers, fibers, coatit, and adhesives, in the prod, of high-perfmmance theniioset and ther-moplifitic dastomeis, elastomeric polyesters, as polyester modifiers. 

In the late 1960s, Nutt developed an unsaturated polyester-modified systemP lt2i] called Estercrete. In the preparation of this system, unsaturated polyester resin dissolved in styrene is mixed with portland cement at a polymer-cement ratio higher than 30%, together with a water-soluble redox catalyst. Table 7.3 ° gives the typical formulations of Estercrete. 

Similar systems have also been examined by Dikeou, Steinberg, et al.,122] Sarny Abdel Monem El-Garf,(2 l Birkimer and Lindeman,(251 and Ye and Wu.(2 l Figure 7.9 represents the effects of curing conditions on the strength development of polyester-modified mortars. 

Figure 7.9 Effects of curing conditions on strength development of polyester-modified mortars. ( 1990, JtUernationalAcademic Publishers, reprinted with permission.)...

CLASS Thermoset polymers (polyesters modified with monobasic fatty acids)... 

Chem. Descrip. Polyester modified polymethylalkyl siloxane sol n. in 1-methoxy-2-propylacetate/phenoxyethanol (1/1)... 

Chem. Descrip. Sol n. of a polyester modified methylalkyl polysiloxane copolymer in Stod./methoxypropyl acetate (9/1)... 

Uses Component of thermoplastic urethane elastomers for inj. molding, extrusion, thermoset PU, castable prepolymers, spandex fibers, metal and textile coatings/linings, adhesives, elastomeric polyesters, as polyester modifiers soft segment in elastomers food pkg. adhesives, poly-... 

Chem. Descrip. Polyester-modified methylphenylpolysiloxane resin with reactive release compd. in xylene/isobutanol/diglyme/dekaline, 17 9 8 1 Uses Binder for prod, of release coatings for industrial and domestic bakeware in resinous/polymeric food-contact coatings Features Good adhesion little thermoplasticity exc. dishwasher detergent resist. 

Chem. Descrip. Polyester-modified, hydrory-functional acrylic copolymer emulsion (47%) in water CAS 25133-97-5... 

Uses For polyurethane formulation for automotive hose and gaskets, tires, industrial belts, tank and pipe liners, floor and roof coatings, medical devices polyester modifier processing lubricant for PVC food-pkg. adhesives, polymers, rubber articles Manuf./Distrib. Aldrich Allchem Ind. BASF Great Fakes Monomer-Polymer Dajac Fabs... 

Din Dinakaran, K., Aalagar, M. Preparation and characterization of bismaleimide (AI,AI -bismalei-mido-4,4 -diphenyl methane)-unsaturated polyester modified epoxy intercrosslinked matrices. J. Appl. Polym. Sci. 85 (2002) 2853-2861. 

T rimethylolpropane trimethacrylate crosslinking agent, polyester modifiers... 

Diethylene glycol Maleic anhydride polyester modifier... 

Lee SY, Choi JI, Wong HH (1999b) Recent advances in polyhydroxyalkanoate production by bacterial fermentation mini-review. Int J Biol Macromol 25 31-36 Lee MY, Park WH, Lenz RW (2000a) HydrophyUc bacterial polyesters modified with pendant hydroxyl groups. Polymer 41 1703-1709... 

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