MATERIALS | PVC PLASTICISERS
Figure 5: Chart showing the relationship between temperature and viscosity in PVC formulations plasticised with a variety of plasticisers tested in a plate-plate viscosimeter. Formulation comprises Solvin 382NG 100 phr, plasticiser 50 phr, Ca/Zn stabiliser 2.5 phr. Source: Varteco/Solvay
an alternative to low molecular weight phthalates and benzoates (Figure 5); Innoleic B5.2 and Innoleic MB25, designed for extrusion processing technologies in flooring, cable, shoes, hoses; and Innoleic B5 and Innoleic MB50, which are intended for plastisol technology.
Speciality focus The Oxoplast business unit within Grupa Azoty is expanding its plasticiser range into speciality products. As of last year, in addition to its Oxoviflex DOTP general-purpose plasticiser, its product portfolio now features the Oxofine line of speciality plasticisers. These include Oxofine DBT, Oxofine TOTM, Oxofine DOA and the first polymeric plasticiser in the portfolio, Oxofine Poly2K. Grupa Azoty says that it is continuing its R&D work to synthesise new products, including renewa- ble-based types. “We see extending the value chain toward speciality products as essential. To this end, we are soon launching a second research and develop- ment center (CBR II) to provide solid support for developing new technologies,” according to a spokeperson for the company.
The company is also working to reduce CO2 emissions related to its products. “We are imple- menting changes within our production facilities to ensure that Segment Oxoplast will benefit from energy utilities produced with a vastly reduced and, periodically, even zero carbon footprint,” said Oxoplast BU director Maciej Budner. Last year, Lanxess completed the acquisition of Emerald Kalama Chemical, the US-based speciality
22 FILM & SHEET EXTRUSION | September 2022
chemicals company. As a result, the plasticiser portfolio of the polymer additives division of Lanxess now includes speciality plasticisers based on benzoate chemistry. These are being produced at two production sites in the US and in Europe. The K-Flex dibenzoate plasticiser product line contains a variety of high solvating dibenzoate plasticisers for PVC applications. “K-Flex 850P and K-Flex 975P have found broad utility as fast fusers in numerous applications and have served as tools for formulators to increase fusion speed, compatibility, and performance when switching from traditional phthalates to the less compatible phthalate alternatives, such as DOTP,” according to Lanxess. “In addition, the K-Flex plasticisers impart
exceptional stain and extraction resistance, especially versus oily solvents. As little as 15% DOTP can be offset using K-Flex 850P or K-Flex 975P to achieve fusion and compatibility perfor- mance very similar to that traditionally found with DINP, while simultaneously improving stain resistance, extraction resistance, and strength. In addition, K-Flex PG can be utilised when tough- ness, stain resistance, and extraction resistance are required to be unparalleled.” (Figure 5).
Technical needs
Another speciality chemicals company, Polynt, has been developing and marketing a wide range of trimellitate speciality plasticisers for different technical needs for some years. At the beginning of July, the company, which is headquartered at Bergamo in Italy, said that to support its future
Grupa Azoty is investing to add speciality plasticisers to its existing Oxoviflex general purpose products
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IMAGE: GRUPA AZOTY
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