additives feature | PVC plasticizers
ageing for seven days at 100˚C, while plasticizer migration was eight times lower than DOP. The V-Ziclus plasticizer showed five times less volatility in activated carbon tests and considerably lower losses in standard immersion tests. Varteco Quimica bio-based chemicals project manager Diego Garcia Touza told delegates the Argentinian PVC compounds market has been shifting away from traditional plasticizers since 2002. While the move from phthalates may have been driven by regulation or consumer concern in
Varteco Quimica says that soybeans are now used to make most of the plasticizers used in Argentina
vice president of Georgia Gulf’s PVC Compounds business. Georgia Gulf is also working with the Javelin
plasticizer products introduced by Segetis, a US-based company developing technologies for the production of solvents, plasticizers and polyols from agricultural products. Its plasticizers are built on cellulosic-based levulinic ketals and are said to be compatible across a wide range of addition levels, and to produce compounds that process at high speed and display good elevated temperature performance and low extractables. Segetis has been working with Kem One (the former
Arkema vinyls business that was acquired by Klesch earlier this year) to determine the suitability of its bio-based plasticizers for replacement of commonly- used phthalates. At AMI’s PVC Formulation conference, Kem One’s R&D director for chlorochemicals and PVC Dr Patrick Morel detailed some investigations it has carried out with two Segetis products in primary and secondary plasticization of PVC. Kem One’s researchers looked at the use of Segetis SGP9100D as a primary plasticizer for a flexible PVC compound and at SGP9200D as a secondary plasticizer in a plastisol application. Morel reported that the SGP9100D plasticizer displayed good absorption and volatility results in flexible PVC formulations, delivering hardness, migration, stability and optical performance similar to compounds plasticized with DINP. The SGP9200D plasticizer was compared against BBP as a secondary plasticizer in combination with DINP in a plastisol formulation and was said to function well. Argentinian chemical group Varteco Quimica
presented data at AMI’s PVC Formulation conference showing how its bio-based V-Ziclus GP general purpose plasticizer – which is based on epoxidised soybean oil - is providing a suitable alternative to DOP for an un- named PVC compound manufacturer. Test data showed that elongation at break, tensile strength and tensile modulus are similar for compounds formulated to provide the same Shore A hardness value. In addition, tests showed that the V-Ziclus grade displayed better retention of mechanical properties after accelerated
36 COMPOUNDING WORLD | August 2012
Europe and North America, product availability and cost have been the key factors in Argentina, which is a major soybean producer. Touza estimates that 70% of the 45,000 tonnes of plasticizers used in Argentina are now based on ESBO, with penetration around 90% in the PVC compounds sector. US-based HallStar has a number of monomeric ester- based phthalate alternatives in its product line, including the renewably-sourced Plasthall PR-A610 product, which is said to be suitable for replacement of DEHP in PVC at 1:1 levels. Other HallStar phthalate alternatives include Plasthall LCOA, which offers performance similar to DOP, and Dioplex VLV, which is said to be a suitable replace- ment for DOP, DINP and linear phthalates. The company also offers a tailor-made plasticizer development programme. Marketed under the Paraplex Approach name, the computer-based system is said to allow it to develop an ester-based plasticizer that will meet the specific needs of customers. HallStar further extended its ester-based plasticizer
portfolio in July of this year with the acquisition of the TP-series of specialty plasticizers from Dow Chemical. The deal includes both trade names and manufacturing technology for the product range, which includes products suitable for plasticising PVC and a wide range of elastomers. “The TP trade name is known worldwide as an integral part of polymer formulations and will significantly expand the types of plasticizer-based solutions we can provide to our customers,” says Louis Pace, executive vice president of HallStar. Danisco’s Grindsted Soft-n-Safe plasticizer, an
acetylated monoglyceride based on glycerine, castor oil and acetic acid, is one of the longer established bio-based options having been on the market since 2005. The company, which was acquired by DuPont last year, says the product is biodegradable, digestible and is approved by most regulatory authorities for use in food contact. It also claims an outstanding toxicological profile, making it suitable for replacement of DEHP in medical applications. Another well established supplier of bio-based alter- natives to phthalates is Switzerland’s Jungbunzlauer, a
www.compoundingworld.com
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