Weathering glass/phenolic

As for the unfilled PA6, for glass filled black PA6 the addition of just a phenolic antioxidants and a phosphite causes already a reduction of the UV degradation rate during accelerated aging. Addition of HALS leads to a further reduction of the rate of gloss loss during weathering (see Fig. 17.12). In this case, the combination of a low... 

Many plastics have short lives when exposed to outdoor conditions. RPs, particularly glass fiber RPs) can be destroyed if not properly fabricated to eliminate seepage of water between fibers and resin. The better materials to weatherability include acrylic, chlorotrifluorethylene, vinylidene fluoride, chlorinated polyether, black linear polyethylene, TS polyester, epoxy, alkyd, and phenolic (Table 9.19). Some of these plastics have successfully performed outdoors for over a half-century. Black materials are best for outdoor service. Some of the styrene copolymers are suitable for certain outdoor uses. 

Hot-setting phenolic adhesives are processed for up to 15 minutes at 100-150°C and at 0.7-1.7 MPa bonding pressure. The film form is processed for up to 15 minutes at 120-150°C and at 0.7-1.4 MPa. This type of phenolic is resistant to weather, boiling water, and biodeterioration. It has superior temperature stability to that of the acid-catalyzed form. Applications of this adhesive include fabrication of exterior-grade weather- and boil-proof plywood and for bonding glass to metal for electric light bulbs. ... 

The oligomer solution is then catalyzed by triethanol amine, metal octoates, or dibutyl tin diacetate and heated to increase the viscosity. At this point, it is cooled and can be stored until used. These silicone oligomers are used to make glass fabric laminates and reinforced molding powders. Phenyl silicon is compatible with epoxy, aUcyd, urea, melamine, and phenolic resins and may be blended with them to increase their resistance to heat, flame, water, and weather. 

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