Protective Finishes

Lac became an important component of decorative and protective finishes by the nineteenth century. It is ironic that the success of shellac led to the synthetic resin industry. Baekeland developed phenoHc resins while trying to find a substitute for shellac. 

In the 3M Water/Alcohol Drop Test (41), this test is designed to provide a simple, rapid method to assess the aqueous stain resistance of substrates treated with a protective finish. 

Air heaters in industrial environments require corrosion-protective finishes that are capable of protecting the coil and case from damage by condensation, acid vapors, or aggressive chemicals, in the air or the primary medium. If air washers are used with coils placed after them, copper or other noncorroding metal tubes should be used. 

Preserving product while the product is under your control may be addressed by your handling and packaging provisions, but in-process preservation may also be necessary to protect finishes from deterioration during further processing. Such measures need to be specified in the work instructions for particular products. For products that start to deteriorate when the packaging seal is broken, the supplier s responsibility extends beyond delivery to the point of use. In such cases markings need to be applied to the containers to warn the consumers of the risks. 

The Reactivity of Explosives with Metals and Protective Finishes , PATR 2288 (1956)... 

Reactivity of explosives with metals and protective finishes)... 

Effects Produced upon Explosives by Contact with Plastics , PATR 1951 (August 1953) 21)B.Z.Zlotucha M.Baer, "The Reactivity of Explosives with Metals and Protective Finishes , PATR 2288 (May 1956) 22)M.J.Bodnar, "Bonding of Explosives to Metal with Adhesives, PATR 2412 (June 1957) 23)M.C.StCyr, "Compatibility of Explosives with Polymers , PATR 2595 (March 1959) 24)Anonymous, "Compatibility of Rocket Propellants with Materials of Construction , DMIC Memo 65, Defense Metals Information Center, Battelle Memorial Institute (Sept I96O) (PB No 161215) 25)K-Schriever, " A New Apparatus for the Determination of the Chemical Stability of Powders and Explosives , Explosivstoffe... 

Since the most probable time for long-term solar exposure is in the summer, the most likely candidates for UV protective finishes are lightweight woven and knitted fabrics intended for producing shirts, blouses, T-shirts, swimwear, beachwear, sportswear, and the like. Indnstrial fabrics designed for awnings, canopies, tents and blinds may also benefit from a UV-protective treatment. 

The requirements for a material to be effective as a UV protection finish include efficient absorption of UV radiation at 300-320 mn, quick transformation of the high UV energy into the vibration energy in the absorber molecules and then into heat energy in the surroundings without photodegradation. Further requirements are convenient application to textile fibres and lack of added colour for the neated fibre. Some typical chemical snuctures useful for UV protection are shown in Fig. 

In most other cases combination with other finishes does not reduce the UV protection. A two-step application is necessary if the pH values of the UV protection finish bath and that of the other finishes are very different. The UV protection finish should be applied first. Problems may arise from limited bath uptake after a repellent finish or after calendering. "... 

Demanding and sophisticated customers as well as fashion designers are looking for new effects. Some of them have been discussed in the chapter on novel finishes, for example anti-odour and protective finishes, wellness finishes that release fragrances or cosmetics and medical finishes that deliver drugs. Additionally, cellulase finishing, especially on microviscose or lyocell fibres, enables novel... 

Black Out . [R.T. Vanderbilt] Toluene/ pigment blends decorative and protective finishing agent for rubber coating materials. 

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