Silicone-modified polyester

Baudoin etal. [168,169] first presented qualitative depth profiles of lacquer and polymer coatings by means of r.f. GD-OES. Quantitative depth profiles were successively obtained by Payling et al. [170] on prepainted metal coated steel. Samples comprised a (rutile) pigmented silicone-modified polyester topcoat over a polymer primer, on top of an aluminium-zinc-silicon alloy coated steel substrate. With GD-OES in r.f. mode, it was possible to determine the depth profile through the polymer topcoat, polymer primer coat, metal alloy coating, and alloy layer binding to the steel substrate with a total depth of 50 im, all in about 60 min on the one sample. GD-OES depth profiles of unexposed and weathered silicone-modified polyesters were also reported [171]. Radiofrequency GD-OES has further been used to... 

Another specialty area is coil coating, which involves coating metal coils by continuous operation. Modern roller systems afford speeds of up to 200 m/min. Most coils are made of cold-rolled and surface treated steel, aluminum, or alloys of the latter with manganese or magnesium. Coating systems are based on alkyd or acrylic resins, oil-free polyester, silicone-modified polyester or acrylic resin, poly(vinylidene fluoride), or poly(vinyl fluoride). Water-reducible systems, mainly based on acrylic resins, have been developed for aluminum as well as for steel coils [21-24], Drying is carried out by continuous operation in gas- or oil-heated multichamber ovens. 

SiUkoftal . [Tego] Silicone-modified polyester resin binders for high gloss coatings, one-coat systems, decorated... 

Chem. Descrip. Aliphatic silicone-modified polyester polyurethane waterborne disp. with n-methyl pyrrolidone cosolv. 

Chem. Descrip. Silicone-modified polyester resin in ethylglycolacetate/ methoxypropanol, 20 1... 

Chem. Descrip. Silicone-modified polyester resin in xylene/cyclohexanone Uses Binder for decorative heat-resist, coatings, e.g., appliance coatings, coil coatings, cookware, bakeware, and industrial coatings in resinous/polymeric food-contact coatings Features Thermal stability to 220 C Regulatory FDA 21 CFR 175.300... 

Chem. Descrip. Silicone-modified polyester (51 1%) in solv. mixt. Uses Surf, wetting agent, flow aid, surf. tens, reducer for self-leveling epoxy coatings, sealants... 

Silicone-modified polyester paints are used for protection in environments which must resist a moderately high temperature, such as fireplace... 

Even more durable polyesters are those reacted further to form silicone-modified polyester resins. Silicones are semi-organic compounds of the general type... 

Siltherm, Silicone-modified polyester. Industrial Dielectrics Inc. 

SiHcone resins provide coatings having outstanding heat resistance and exterior durabiHty. The cost is relatively high but for specialized appHcations these resins are important binders (64). Silicone-modified acryHc and polyester resins provide binders having intermediate durabiHty properties and cost. Fluorinated polymers also exhibit outstanding durabiHty properties. High cost, however, limits appHcabiHty. 

Poly butylene Terephthalate (PBT) Commercial adhesives recommended include modified epoxies, cyanoacrylates, acrylics, polyurethanes, silicone, and polyesters. 

Silicone-modified unsaturated polyesters have received a fair amount of study. The most interesting effort consisted of reacting dimethyldi-... 

Saturated polyesters and saturated alkyds cannot undergo such modification with vinyl monomers but can be modified with other polymers such as silicone resins by alcoholysis. Here outdoor durability is considerably improved. 

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... 

Control of fiber friction is essential to the processing of fibers, and it is sometimes desirable to modify fiber surfaces for particular end-uses. Most fiber friction modifications are accomplished by coating the fibers with lubricants or finishes. In most cases, these are temporary treatments that are removed in final processing steps before sale of the finished good. In some cases, a more permanent treatment is desired, and chemical reactions are performed to attach different species to the fiber surface, e.g. siliconized slick finishes or rubber adhesion promoters. Polyester s lack of chemical bonding sites can be modified by surface treatments that generate free radicals, such as with corrosive chemicals (e.g. acrylic acid) or by ionic bombardment with plasma treatments. The broken molecular bonds produce more polar sites, thus providing increased surface wettability and reactivity. 

Structure II polymers are relatively elastic when polymethylphenylsiloxanes are obtained by the hydrolytic cocondensation only of trifunctional monomers (e.g., methyl- and phenyltrichlorosilanes), there are polymers with low elasticity. Polydimethyl- and polymethylphenylsiloxanes can be modified with organic polymers (polyester, epoxy) or silicone substances, e.g. methyl(phenylaminomethyl)diethoxysilane. The modification of polydimethyl- and polymethylphenylsiloxanes improves some properties of these polymers and varnishes based on them in particular, it considerably increases adhesion and mechanical durability of varnish films. 

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