Polyester finishes saturated

Polyester resins possess premium performance properties such as exterior durability, gloss, flexibility hardness, color stability, and versatility of cure. Polyesters are used in product finishes for household appliances, food and beverage containers, aircraft and equipment, automotive primers and bake coats, metal furniture, and fixtures. For example, water-soluble saturated polyesters are used in industrial baking paints, and in combination with melamine resin. Polyesters can be formulated in high solids and waterborne formulations to meet the requirements for the low VOC coatings being mandated by the EPA. 

Saturated polyester-resins have been defined in Chapter 12 and their use with nitrogen resins was described in Chapter 13. The resins used in polyurethane finishes might contain a selection from the ingredients listed on p. 161 and, amongst others ... 

Finish 114 or Volan After heat cleaning (Finish 112), the fabric is saturated with a chrome complex or Volan (trademark). Fabric with 114 finish is compatible with polyester resin. 

Chemical, electrical, and thermal properties The chemical building blocks of the polyester, the molar ratio of maleic anhydride to saturated dicarboxylic acid, and the choice and content of the monomer dictate to a large extent the mechanical properties (rigid or flexible), the glass transition temperature (Tg) or HOT (heat deflection temperature), and the thermal and chemical resistance of the cured products. Additives are available for use with many resin systems to provide properties such as color, high surface finish, UV resistance, and low shrinkage. 

It is also interesting in this connection to study the question of how the fastness to washing of the antimicrobial finish behaves when this finish is applied in the dyeing of the polyester woven fabric. Of equal interest is the question of whether the concentration of the dyes used has an influence on the permanence of the finish. Obviously, the levelness of such finishes is also of interest. The levelness of the dyeing can easily be tested. Less easily tested, however, is the levelness of the antimicrobial finish. In the tests carried out in our own laboratory with the product Sanitized T 96-20, which contains Triclosan as the active component, no cases of unlevelness were observed. This finding was both with respect to the depth of the dyeing (from pastel to saturated) as well as in the antimicrobial results. Also, no influence on the permanence of the antimicrobial finish could be found [6]. 

In addition to a reaction diols with dibasic acids, most polyester polymeric plasticizers, as mentioned above, are end-capped. Organic monobasic end caps are normally saturated fatty acid types. Alcohol end caps are usually in the Cg to Cio range. For several appheations, it is desirable to finish the polymeric plasticizer and reduce the residual acid or hydroxyl content essentially to zero. Acetic anhydride is typically used to eliminate hydroxyl content. 

---