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2007-02-28 News Release
Chemicals portfolio for the leather industry The LANXESS chemicals group is a full service provider of leather chemicals and solutions meeting needs for every step of leather manufacturing.
The chemical company LANXESS continuously improves its chemicals portfolio
for the leather industry in order to meet the customers requirements.
Recent, innovative product examples are the polymers LubritanTM XS/XB
for so-called "open" waterproofing technology. They can ideally
be combined with Levotan* PS 100 for waterproofing applications.
The retanning agent Levotan PS 100 which is produced by LANXESS Wuxi Chemicals Co., Ltd. in Wuxi, China, specifically exemplify the importance of the Asian and specifically of the Chinese market for LANXESS as a dedicated supplier of the leather industry. Levotan PS 100 is an innovative powder polymer leading to outstanding leather properties. It is used at low pH values before rechroming. Adding it in combination with another innovative product like Levotan C-C 01, extreme tightness can result. The product is not only suitable for firm articles. If used for milled upper articles, a very fine and most even milling pattern over the whole area of the crust leather can be obtained. For the tanner this translates into an increased cutting yield. Combining Levotan PS100 with suitable syntans yields a leather with vegetable type character, which meets highest fashion standards. One big advantage of this article with using Levotan PS 100 is that the total retanning process is highly economical. Levotan PS 100 is also highly suitable for waterproof leather, yielding very firm leather. In combination with Lubritan* XB/XS, high value waterproof articles can be obtained. As a result of recent investments at the Wuxi site, LANXESS now has also considerable capacities for manufacturing powdered tanning materials from the Tanigan* and Retingan* ranges in China. This includes for instance Tanigan SR-C, an anionic retanning agent which, in addition to having a dispersing and neutralizing effect, is also a strong reducing agent - especially for free formaldehyde. Supplied in powder form, Tanigan SR-C can be employed in all the various stages of the retanning process, e.g. in neutralization, retannage and dyeing. "Tanigan SR-C has proved particularly effective at low to medium float temperatures," says LANXESS leather expert Christopher Henzel. "We recommend adding one to two percent of the product in the neutralization and the same quantity in the retannage or dyeing to prevent the formation of free formaldehyde." The dispersing and neutralizing effect helps the other retanning products used to be more uniformly distributed in the leather and also leads to more level dyeings. Levotan XPS is a light fast, heat resistant and filling polymer retanning material with pronounced softening properties and waterproofing effect. The product is particularly suitable as an aftertreatment. It is used in polymer and fatliquoring mixtures as well as a waterproofing agent for soft mainly dry-drummed leather types. It is applied in the production of soft types of leather like softy upper, furniture upholstery, splits and soft waterproof leather. Levotan XPS imparts a slight water-repellent effect to the crust and gives therefore a reduced absorption and water uptake, that helps keep the leather soft even after finishing. If Levotan XPS is used for soft types of waterproof leather, it imparts a nice round handle and good static and dynamic testing results. Tanigan HO/ Tanigan HO liquid are anionic replacement syntans with excellent light fastness and resistance to heat yellowing. They can be used in the retannage of all types of chrome leather and in synthetic tanning systems for white leather or added to vegetable tannages. In the production of white leather Tanigan HO and Tanigan HO liquid provide good coverage and a high degree of whiteness and brilliant shades when dyeing chrome tanned leather. Leather treated with Tanigan HO or Tanigan HO liquid is firm with good fullness and grain elasticity and due to their low astringency the fine grain character of the leather is retained. Tanigan HO and Tanigan HO liquid, when used in the retannage of chrome leather are compatible with all common synthetic, resin and vegetable tanning materials and they have good dispersing properties on these products. When used in the vegetable tannage, Tanigan HO and Tanigan HO liquid lighten the color of the leather and accelerate the penetration and dispersion of the tanning materials. Aquaderm* Finish HW2 is a newly developed polyurethane top coat binder for high wear automotive finishes and coatings which require excellent physical fastness properties, like e.g. car upholstery leather. In addition to its very good wear resistance and its good heat, cold and light stability, Aquaderm Finish HW2 has excellent flex characteristics and very good rubfastness properties. Furthermore Aquaderm Finish HW2 has a high film elasticity despite its hardness. Aquaderm Finish HAT is a hard PUD top coat binder for waterborne finishes and coatings. The main features of Aquaderm Finish HAT are its hardness and hydrolysis resistance in combination with very good light fastness. The product has been developed especially as a PUD top coat component for NMP-free finishes and coatings. Especially remarkable for a binder of such hardness is its excellent flexing performance. Aquaderm Finish HAT can be used very well in combination with other polyurethane dispersions of the Aquaderm and Bayderm* product range. Therefore top coats with excellent properties within a wide range of film-hardness can be made. Opti-Matt™ A-1000 is a new dull silica-free acrylic top coat dispersion for furniture leather based on innovative matting technology. Top coats made with Opti-Matt A-1000 provide good wet rubs, good flex resistance and a very pleasant and soft feel. Finishes made with Opti-Matt A-1000 do not tend to repolish. The product can be used as a sole binder or in combination with e.g. Opti-Clear™ A-1100 as the gloss component in furniture to coats in order to achieve gloss levels from semi dull to glossy. Both products are developed by Rohm and Haas Corp., Philadelphia, USA, and marketed by LANXESS. With its numerous production and marketing sites as well as research
and development centers all over the world, LANXESS is in a position to
meet global requirements and offer system solutions to its customers.
LANXESS’s products for the leather industry include inorganic and
synthetic tanning materials, preservatives and fatliquoring agents, dyestuffs,
and a wide range of tanning and finishing auxiliaries. Shoe upper leather
accounts for about half of the Leather business unit’s sales, automotive
leather for roughly a quarter, and furniture leather for 20 percent. The
business unit is among the leading suppliers to the leather industry and
forms part of LANXESS’s Performance Chemicals segment, which posted
sales of EUR 1,977 million in fiscal 2005.
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