PVC | STABILISERS/LUBRICANTS
IKA claims its patented S-granule technology enables broader formulation flexibility
mark LZC668 for flexible PVC food-contact applica- tions. “Valtris continues to be the market leader in low-emission phenol-free liquid stabilisers for both ePVC and sPVC applications,” claims Hollo. Recent introductions are more cost-effective but techni- cally comparable to their predecessors (Lankro- mark LZC690 and Lankromark LZB1227) and are attractive in cost-sensitive market sectors where technical demands are increasing, she says. The company has also recently developed
mance in demanding applications such as exterior profiles and foam board. “Process improvements include lower torque as a result of the higher internal lubricity derived from the fatty acid components relative to the EHMA ligand,” he says. PMC Organometallix is also exploring tin stabilis-
ers that are fully EHMA-free. An example is Thermo- lite OM-3130, which McGuire says has shown process and finished article improvements relative to the use of traditional octyl-based EHMA stabilisers in applications such as PVC film and sheet.
Established expertise At Valtris Specialty Chemicals, Business Director Stabilisers Brenda Hollo points to an 80-year history of developing heat stabilisers for PVC applications, built up through its predecessors and acquisitions (notably Ferro, Lamberti and Akros). Valtris offers state-of-the-art stabilisers free of TNPP (trisnonylphenol phosphite), such as Lankro-
several grades for the still fast-growing PVC floor covering market. Examples include Therm-Chek VT 348P, which is a heavy metal-free one-pack stabi- liser for highly filled rigid LVT compounds. Hollo says it offers “excellent internal lubrication and provides long-term stability at an economical price point.” Therm-Chek VT 117P is a non-toxic Ca/Zn stabiliser used in flexible/highly filled LVT layers, providing very good long-term stability and balanced rheology and lubrication. For carpet backing, Therm-Chek RC 995P (Ca/Zn) and Therm-Chek RC 996P (heavy metal-free) heat stabilisers have been developed to work synergisti- cally with the Santicizer Platinum G-2000 bio-based plasticiser and offer what Hollo says is a sustain- able, economical and high performing system. In the area of traditional tin stabilisers for rigid
PVC, recent Valtris product introductions have focused on technologies using renewable carbon sourced solvents. The product offering now features two weatherable stabiliser systems — Akcrostab T-5322 (22% butyl tin) and Akcrostab T-5335 (15%) — as well as Akcrostab T-5339 (9%) and Akcrostab T-5336 (6%) for non-weatherable and substrate applications. The new systems can
IMAGE: IKA
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