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As with aliphatic polyurethane or acrylic coatings, polyaspartic coatings made with aliphatic isocyanates and derivatives are UV and light stable and have a low yellowing tendency. When coating concrete, polyaspartics can be installed in both clear and pigmented form.
All clear or translucent varnishes, and indeed all film-polymer coatings (e.g. paint, stain, epoxy, synthetic plastic, etc.) are susceptible to this damage in varying degrees. Pigments in paints and stains protect against UV damage. UV-absorbers are added to polyurethane and other varnishes (e.g. spar varnish) to work against UV damage but are ...
The usage of higher-quality UV polyurethane resins ensures greater flexural performance for external applications and the resin will not yellow (non UV aromatic) in appearance when exposed to UV light, the presence also provides greater protection from UV degradation. Non light-stable polyurethanes, although marketed as strong in performance ...
Retrobright (stylized as retr0bright or Retrobrite [1]) is a hydrogen peroxide-based process for removing yellowing from ABS plastics. Yellowing in ABS plastic occurs when it is exposed to UV light or excessive heat, which causes photo-oxidation of polymers that breaks polymer chains and causes the plastic to yellow and become brittle.
Here, the UV radiation and rough weathers belabor the polymer so much, that the material has to be replaced frequently. Poly(ethylene-naphthalate) (PEN) can be protected by applying a zinc oxide coating, which acts as protective film reducing the diffusion of oxygen. [51]
CASETiFY just created the best non-yellowing option. Clear phone cases show off your phone's natural beauty, but most turn yellow quickly. CASETiFY just created the best non-yellowing option.
Wet cleaning is the process of further removal of dirt, grime and residue from the surface of the object that is not successfully removed by dry cleaning. Testing of various solvents should be done prior to wet cleaning the surface of the object in order to prevent possible damage to or removal of the original lacquer surface. [ 16 ]
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