Silicone coatings properties

Silicones play a very important role in the coating industry because of the versatility of polymeric silicone precursors and the unique combination of properties silicones can offer. One can discuss silicone coatings within a couple of loosely defined categories ... 

In the category of silicone coatings used for surface modification of the specific substrates, functional silicone fluids are often used, which can selectively interact with the chemical groups of the substrate, thus modifying its surface properties. The use of functional silicones in the textile industry has been discussed in a number of recent publications.5 421 422 The use of different types of high-performace silicone-coated textiles, which include elastomers and resins, has recently been reviewed.423 The use of functional silicones in personal-care products, for example, in shampoos and hair conditioners, mentioned before,381 provides another well-known example. 

The airbag system includes an ignition device that quickly generates a large volume of gas that inflates the airbag itself The latter is a bag of synthetic textile possibly coated with silicone. Its properties are ... 

Ji and Kumar [107] presented an invention in which, after treatment with PTFE, the cathode diffusion layers are coated with a silicon solution in order to enhance the hydrophobic properties of the DFs. This silicon does not have to be coated over the whole surface of the DL, but could be coated in just certain areas, depending on the design of the cell, the location of fhe cell wifhin a stack, and the desired hydrophobic properties. It was demonstrated how a DL with the silicon coating improved the performance of a single fuel cell when operating at high relative humilities [107]. 

Binder for various multi-component and hybrid coatings (abrasives, powder, fillers) with silicone surface properties mentioned above... 

Among the most successful of the new radiation-curable silicone coating systems are compositions Incorporating cycloaliphatic epoxyfunctional silicone polymers with compatible iodonlum salt photocatalysts (1 - S ) The syntheses, structures, UV cure response, and other properties of these materials and some of their derivatives and monomeric homologs are discussed In the balance of this chapter. Their specific application for release coatings has been described In great detail elsewhere (5.6 > and Is not the subject of this paper. 

The preceding section shows how it is possible to deerease the quantity of synthetic polymer while retaining the same fimetional properties. In this way the environmental footprint is diminished, but the produets are still not amenable to recycling processes because of the cross-linking chemistry used in the silicone phase. The feet feat these silicone coatings may be used for their barrier properties should motivate a transition toward this important area of packaging. 

Chem. Descrip. Emulsion of paraffin-based mineral oils and hydrophobic components, containing silicone Uses Defoamer for solvent-based and solvent-free coatings Properties Wh. Iiq. mild hydrocarbon odor sp.gr. 0.94 dens. 7.74 ih/gai vapor pressure 10 mm Hg flash pt. (Seta) >100 C 51%. NV in petroleum distillates... 

Chem. Descrip. Silicone-contg. defoamer in diisobutyl ketone soiv. Uses Defoamer for solv.-born coatings, air-drying systems, industrial and decorative finishes, and airless spray coatings Properties Colorless clear Iiq. dens. 0.80-0.82 g/cm (20 C) flash pt. 47 C ref. index 1.410-1.420 Use Level 0.5-1.0% (on total formulation)... 

Uses Surface modifier producing transparent films with exc. antiwetting and antisticking props, against oils, silicones and photoresist sol ns. in mfg. of semiconductor devices antimigration barrier release coating Properties Thin, clear and colorless liq. sp.gr. = 1.7 Storage Store at or near R.T. 

Chem. Descrip. Fatty soaps, fatty esters in hydrocarbon, silicone-free Uses Defoamer for water-based coatings Properties Water-disp. nonionic Foamaster DS [Cognis/Coatings Inks]... 

Chem. Descrip. Modified aryl-alkyl silicones Uses Antifloating agent, antisilking agent for solv. systems, curtain coats Properties Colorless mobile liq. sp.gr. 0.818 flash pt. 28 C 50% act. in xylene... 

Uses Spreading agent, emollient in antiperspirant formulations offers humidity resist, to hair spray formulas plasticizer for silicone elastomers hydrophobizing agent for silica in water thermoplastics, textile and paper coatings raw material for RTV silicone systems Properties Water-wh. clear liq., odorless, tasteless vise. 90-150 cst acid no. 0.05 max. 

Uses Flow aid, leveling agent for p. coatings for polyesters, epo) resin systems, epoxy esters, crosslinking acrylics, polyurethanes Features Silicone-free Properties Powd. 

Uses Hot-melt adhesive for extmsion of fusible film, monofilament, netting, web, and multifilament, for thin film fusible coatings, for fusion bonding of textiles, leather, wood, glass, metals, and misc. applies., for coating of interlinings and nonwovens for garment industry Features Rec. for siliconized fabrics Properties Powd. 

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