Ultra violet (UV) radiation is known to contribute to the chemical modification of exposed paint surfaces resulting in loss of gloss, colour change, chalking, flaking and eventually destruction of the clear coat paint film by oxidation UVR protection is a sacrificial / renewable component; this is due to the UV protection layer (stabilizers) being degraded by exposure to the elements (sun, sand, road or sea salt, and etc) it is also water miscible, so it is imperative that you renew it and needs to be re-applied on a regular basis (dependent upon location climatic condition)
There is no such thing as a permanent UV stabilizer, it a matter of physics, not chemistry. Ultra violet protection is a sacrificial and necessarily renewable protection. Acrylic polymers and polyurethane polymer are slow to absorb UV light and accordingly very resistant to photo degradation.
Ultra violet (UV) Protection
To determine a sunscreen's sun protection factor (SPF) testers chose 20 sun-sensitive people and measure the amount of UV rays it takes them to burn without sunscreen. Then they redo the test with sunscreen. The "with sunscreen" number is divided by the "without sunscreen" number, and the result is rounded down to the nearest five. This is the sun protection factor (SPF)
Some car care manufacturers are using an SPF number to rate the ultra violet (UV) protection of their paint protection products, I would be interested as to how these numbers were arrived at.
UVR protection is a sacrificial / renewable component; this is due to the UV protection layer being degraded by exposure to the elements (sun, sand, road or sea salt, and etc) it is also water miscible, so it is imperative that you renew it and needs to be re-applied on a regular basis (dependent upon location climatic condition)
There is no such thing as a permanent UV stabilizer, it a matter of physics, not chemistry. Acrylic polymers and polyurethane polymer are slow to absorb UV light and accordingly very resistant to photo degradation.
Modern cars are being designed with inherent protection features, oordinary car window glass filters out about 97% of the UV-B radiation and about 37% of UV-A radiation, modern clear coat paint contains UV inhibitors, but these features do not offer full protection.
Infrared Radiation
Dependent upon interior colour - at a 90.oF ambient; Interior (Light) 104 - 135.oF (Dark) 220 – 275.oF,
Steering wheel – 160.oF - Dashboard 182.oF - Seats 165.oF Dependent upon colour and material used, actual results may vary depending on time in sun, make of car, size of windows and direction in which car is parked.
Represents part of the ultra violet solar spectrum (approximately 55%-60%). The remaining heat source comes from visible and ultra violet (UV) light. Heat alone will not cause photosynthesis (fading) UVB radiation is what is responsible, although it will dry the resin (binder system) in paint; leading to oxidation. It will also dry out the oils and plasticizers in vinyl and other materials and may lead to structural damage
UV Stabilizers
Ultra violet stabilizers are a group of chemical agents with the ability to counteract or neutralize the harmful effects of UV light? Competitive absorbers provide protection by converting UV light to heat so it can dissipate harmlessly. Other UV stabilizers work differently, but all UV stabilizers are consumed as they do their job. In a way, they serve as sacrificial molecules, taking the abuse from the UV light instead of the material they are protecting.
Two important points:
1. UV protection is a sacrificial / renewable component; this is due to the UV protection layer being degraded by exposure to the elements (sun, sand, road or sea salt, and etc) so it is imperative that you renew it or your surfaces will degrade.
2. UVR stabilizers have to be periodically renewed or replenished if continuing protection is to be achieved, there is no such thing as a permanent UV stabilizer, it a matter of physics, not chemistry.
Infrared Radiation
Dependent upon interior colour - at a 90.oF ambient; Interior (Light) 104 - 135.oF (Dark) 220 – 275.oF,
Steering wheel – 160.oF - Dashboard 182.oF - Seats 165.oF Dependent upon colour and material used, actual results may vary depending on time in sun, make of car, size of windows and direction in which car is parked.
Represents part of the ultra violet solar spectrum (approximately 55%-60%). The remaining heat source comes from visible and ultra violet (UV) light. Heat alone will not cause photosynthesis (fading) UVB radiation is what is responsible, although it will dry the resin (binder system) in paint; leading to oxidation. It will also dry out the oils and plasticizers in vinyl and other materials and may lead to structural damage
Information resource
1. Wikipedia® Encyclopaedia
2. Automotive Detailing Inside & Out; a Knowledge Base for the Perfectionist", by Jon Miller
3. TOGWT™ Series of Detailing Articles, by Jon Miller
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