Hydroxylated polyesters

The preparation of hydroxylated polyesters involves reactions of various polyols and polyol combinations with polybasic acids to give a wide range of properties. In the design of these resins, the polyol source is generally determined by the amount of hydroxyl groups available for further reaction of the polyester chain with cross-linking polymers. The polyols most often used as sources of available hydroxyls are pentaerythritol V, trimethylolethane VI, and trimethylolpropane VII. 

A general idealized structure of a hydroxylated polyester based on 2 mol of trimethylolpropane, 9 mol of 1,6-hexanediol, and 10 mol of isophthalic acid is the following (11. 12) ... 

The hydroxylated polyesters react with special silicone intermediates to give silicone-polyester copolymers for baked finishes that provide high heat resistance and outstanding exterior durability (14). These resins are extensively used in coil coatings for steel and aluminum building panels where high durability is required (Figure 6). 

BaycoU. [Bayer Miles] linear hydroxyl polyesters and polyethers polyols for adhesive formulation. 

Butylene glycol is manufactured by the catalytic hydrogenation of acetol, a product of the self-condensation of acetaldehyde. Esters of this product are used as plasticizers for cellulose and polyvinylchloride resins. The diacetate is a plasticizer for hydroxylated polyesters. 1,3 Butylene glycol is also used as an aircraft deicing fluid. 

Hydroxalamine disulfonic acid, 193 Hydroxylamine phosphate oxime (HPO), 219 Hydroxylamine sulfate, 192-194, 219 Hydroxylammonium phosphate, 219, 220 Hydroxylated polyesters, 160 Hypochlorus acid, 149... 

Uses PU intermediate producing high< ualily flexible polyester slab foams for use in textile laminates, pkg., filter media, and in noncellular applies, such as coalings, adhesives, and elastomers Features Sal., crosslinked primary hydroxyl polyester rec. where good flexibility and solv. resist, are required Properties Pale liq. m.w. 2600 dens. 9.3 Ib/gal vise. 18,000 cps acid no. 1-2 hyd. no. 50 Lexorez 1101-60A [Inolex]... 

In a different vein, 10,11-epoxyundecanoic acid was exploited as an AB monomer, which was polymerised by the oxirane ring-opening chain process induced by the carboxylic group sitting at its other end and catalysed by ammonium or phosphonium salts [78], as illustrated in Scheme 4.19. The ensuing linear hydroxylated polyester... 

Condensation polymerization of glycols with tartaric acid results in poly(alkylene tartrate)s [42 4]. The hydroxylated polyesters from C2 and C4 are hydrophilic and water soluble and those from C6 and higher glycol are water insoluble with increase in hydrophobicity with increasing size of glycols. Crosslinkable unsaturated poly(alkylene tartrate)s are obtained by adding maleic anhydride to the polymerization of glycols with tartaric acid (4) [45]. Poly(tartrate) was obtained from the condensation of tartaric acid ketal with tartaric acid diacetate [46]. 

Triethylene diamine Epoxy/epoxy, epoxy/novolac, epoxy/amine, epoxy/ acrylic, epoxy/polyester, isocyanate/hydroxyl (polyesters and acrylics)... 

Low-molecular-weight low-viscosity hydroxylated polyesters can be used for this purpose and can be formulated from glycols, higher polyols and poly basic acids. The HS fully alkylated amines fit well into this type of coating system because they have low molecular weight, are of moderate viscosity, carry little or no solvent and thus offer many advantages in HS formulations. 

Curing of oil-modified alkyds with polyisocyanates results in faster drying, better chemical resistance and abrasion resistance. Hydroxylated polyesters crosslinked with both aromatic and aliphatic polyisocyanates are finding extensive applications in high-quality maintenance finishes. These two-component finishes cure at ambient temperature. Aliphatic urethane types are used on aircraft, rail and other transportation equipment where excellent gloss retention and... 

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