Get a grip on light with Uvinul - BASF USA

1 Get a grip on light withUvinul ! light stabilizers from BASF:Expect more!Every sunset is a in the worldBASF offers worldwide serviceBASF The synergy of global the worldwide leading chemical company, BASF is not only oneof the most important suppliers of plastics on the international mar-ket, but also in the development and manufacturing of colorants,stabilizers and other additives for the plastics processing conduct intensive research in our laboratories to stabilize plas-tics against UV radiation. Our chemists and physicists investigatethe degradation mechanisms of plastic aging. The knowledge gain-ed in this process flows directly into the development for radicalscavengers and UV absorbers.

2 Application testing takes place inspecially equipped laboratories and application centers. In-houseaccredited analysis laboratories support our Department of Safetyand Regulations and, at the same time, serve our customers withexpertise in this we are not only concerned with protecting plastics. The safetyof our staff and environmentally compatible production are also ourtop priorities. Our commitment to Responsible Care 1and sustain-able development forms the basis of our actions and hence alsoguarantees sustainable success for our contact us if you have problems to solve in the field of poly-mer stabilization. Your technical inquiries will be answered reliably,competently and quickly via the regional application technologycenters in USA, China and Germany.

3 with sales offices in over 120countries and a worldwide logistics network, we guarantee that theentire BASF range of colorants and stabilizers is available to you atall times on time and in the highest quality!0203 Nature serves as our model for UV protection. In the course ofevolution, it has developed the most sophisticated techniques forprotecting the cells in plants and animals from ultraviolet , protection from UV radiation not only plays an important rolein nature, but also in the world of plastics. Polymer degradation isomnipresent - especially in outdoor applications. UV radiation canstimulate molecules to such an extent that their chemical bondsbreak.

4 Bond breakage of this nature releases highly reactive radi-cals, which are able to destroy other molecules. As further radicalsare formed by this reaction, the degradation of the polymer pro-ceeds indefinitely in a chain reaction. If this chain reaction is notinterrupted, the plastic component soon loses its mechanical,optical and coloristical order that your plastics remain in form for as long as possible,they need protection against UV radiation. Just as skin can be protected with sunlotion, so can a plastic be protected by a UVabsorber. These compounds absorb the UV radiation and transformthe incident energy into harmless heat. The great advantage oforganic UV absorbers over substances such as commercially available carbon black or TiO2is that they neither compromise colornor transparency and are easy to disperse in the polymer.

5 This alsoallows transparent or colored polymer applications to be protectedagainst UV radiation without fulfill these tasks, UV absorbers must exhibit a number of essen-tial properties. They must not be damaged by UV radiation them-selves and they must be sufficiently thermostable for the extrusionprocess. Their tendency to migrate must be low, since otherwisethe molecules easily drift to the surface where they may, forexample, be washed away by rain. Protection against UV radia-tion is lost as a result and the durability of the polymer is not sufficiently on the heels of stabilizationBesides the UV absorbers, the hindered amine light stabilizers(HALS) help extend the durability of plastics exposed to UV radia-tion.

6 This product group has made many long-term applicationspossible for the first time, especially for thin-walled applicationssuch as fibers and contrast to the physically active UV absorbers, the various HALS react chemically. They interrupt the propagation of polymer degra-dation by scavenging the radicals created at chain breaks, thusrendering them harmless. Their high level of protection is due to the fact that each stabilizer molecule is not only able to react once but may react many times. This sustainably decelerates the chainreaction of the HALS work chemically, they are suitable for applications inany layer thickness. However, HALS molecules are also subject tomigration, especially if they have a low molecular weight (under1,000 g/mol).

7 Oligomeric HALS with a molecular weight of 2,000-5,000 g/mol demonstrate clear advantages in this respect. If theirstructure is matched to the application polymer, they show verygood compatibility with these polymers and do not migrate. BASF works closely with its customers to jointly find the best solutionfor the stabilization problem at % Sicopal Blue K 6310 after 0 h1,00,0[ m]-1,0R- Profil Filter Ml DIN 4777 Lc = 0,025 mmTaster TlE Lt = 1,50 mm 1,501,00,0[ m]-1,0R- Profil Filter Ml DIN 4777 Lc = 0,025 mmTaster TlE Lt = 1,50 mm 1,50 Roughness measurementNormal view130x magnification1,00,0[ m]

8 -1,0R- Profil Filter Ml DIN 4777 Lc = 0,025 mmTaster TlE Lt = 1,50 mm 1,50 Ultramid % Sicopal Blue K 6310 with Uvinul 4050 H after 3,000 hUltramid % Sicopal Blue K 6310 without stabilization after 3,000 hAccelerated weatheringAs a means of reducing the time to test samples, these are subjected to simulated environmental conditions (sunshine, rainetc.) in accelerated weathering devices. The reduction in testingtime essentially results from the continuous radiation or weatheringof the operate one of the largest European stations for acceleratedweathering to allow comparative tests to be carried out for ourcustomers or for our own test series related to R&D.

9 The capacityof this station is 17 m2of irradiated or weathered surface and istherefore sufficient for about 1,700 tests are especially important if products from research and development are to be tested in our customers the basis of the data obtained from accelerated weathering, thedurability to be expected for polymers in the different applicationsmay be most important standards, according to which thetests are performed, are: DIN EN ISO 4892-2 DIN EN ISO 105-B 02 DIN EN ISO 105-B 06 DIN EN ISO 513 DIN 53387 (1982) for PVC (SST: 50C) SAE J 1960 SAE J 1885 AATCC 169 (1995) GMI 00002 PV 1323In principle, other light exposure and weathering tests,based on other standards and regulations, may also be adopted.

10 Additional in-house accelerated weathering stations are available to BASF and our customers in the USA, Japan and in China. The acceleration of weatheringSince environmental conditions differ significantly between differentregions of the world, the test should be carried out in the region inwhich the final product will be employed. Therefore, BASF alsocarries out outdoor tests in many countries around the globe:Spain, Kenya, Brazil, Ecuador, Mexico, USA as well as Thailand,Australia, Japan and weatheringAlthough accelerated weathering yields meaningful and repro-ducible data, it cannot simulate all environmental conditions. Forexample the influence of air pollution, the shape and setup of thefinal work piece and mechanical stress through wind, hail or snowwill not be covered by the standardized weathering of , in addition to accelerated weathering, we perform outdoorapplication together with our customers.