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Delivering Protection Effects via Surface Care and Cleaning Applications - Protection of sensitive surfaces like Wood, Leather and alike -

IP.com Disclosure Number: IPCOM000012143D
Publication Date: 2003-Apr-11

Publishing Venue

The IP.com Prior Art Database

Related People

Hartwig Pfreundschuh: CONTACT

Abstract

Comprehensive protection of light and oxygen sensitive materials can be acchieved via typical home care formulations. This enables the consumer either to implement or to refresh/increase the protection of sensitive substrates and surfaces. It was shown that - an UV absorbing film can be formed by typical home care formulations if UV absorbers are incorporated. - Antioxidants improve the stability of light and oxygen sensitive materials such as, but not limited to, wood. They can be synergetic in conjunction with UV absorbers. - Hindered amine light stabilizers (HALS) are also very effectively protecting substrates like wood from light induced degradation, as results have shown.

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          Delivering Protection Effects via Surface Care and Cleaning Applications - Protection of sensitive surfaces like Wood, Leather and alike -

Introduction

In recent years a trend back to natural materials could be observed for housing materials and contents, such as wooden floors (parquet), walls, ceilings and wooden furniture. It is more and more common to leave the wood natural, untreated. This keeps the original look and feel of this unique natural material. However, wood is very sensitive to light, and even under diffuse light conditions it starts to change its shade, resulting in undesired shade deviations. Uncolored wood tends to darken, colored or stained wood lightens or discolors. This is especially obvious since all external areas of the furniture are not exposed to light equally. Wood finishings containing light stabilizers that can actually reduce this effect significantly. However, even these finishes alter over time due to daily use/treatment, e.g. parquet finishings scrape away due to walking, moving furniture, etc. Therefore effective protection is lost over time. As a result, untreated wood has little protection against exposure to sun causing damage at the surface.

In addition to wood, there is also other light sensitive materials found in today's households: Leather, which is used for furniture, shoes, jackets and many other common fixtures. Leather materials are also prone to sun damage. The resulting uneven coloration of such products is not desired, especially as leather products are generally rather expensive materials.

Textiles like curtains, carpets or furniture with textiles encounter the same fading issues, the sunlight causes fading and discoloration of these materials. Also plastic and many other surfaces are prone to sun damage.

Therefore, there is a need for effective protection of many of the surfaces found in the various fittings, furniture and other contents of households as well as for clothing and textiles like jackets and shoes.

Our investigations showed that application of household formulations like cleaners, surface care products, polishes, sprays and alike can help to significantly reduce the effect of sun damage and thus can enhance the lifetime of the here mentioned materials.

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Details and Discussion

The damage of wood, leather, plastic and textile material caused by light exposure can be due to one or more of the following effects:


1) Exposure to UV light
2) Exposure to visible light
3) Autoxidation

UV light is very energetic light capable of breaking bonds and generating highly reactive, free radicals. The sunlight contains UV-B light as well as UV-A light. As window glass usually absorbs most parts of the UV-B light, materials in-house are especially exposed to UV-A radiation while materials that are also used outside are exposed to UV-A and UV-B light. Hence, broadband UV-absorbers are necessary for sufficient protection. These do not only absorb UV-B light, but...