materials feature | PVC Formulation
with PVC; high thermal stability, which ensures good colour stability; balanced theology behaviour; and effective performance in low concentrations (0.3 to 1.0phr). Georgia Gulf is to develop a new flexible PVC
compound that uses Javelin bio-based plasticisers from Segetis.
The Segetis plasticisers, which use cellulosic-based
levulinic ketals, are compatible across a wide loading range, are highly efficient and claim to deliver faster processing speeds and elevated temperature perform- ance. Other benefits include low vapour pressure and low extractables. They are broadly miscible with many resin families, says the company. “This combines Segetis’ proprietary technology with
Georgia Gulf’s vinyl compounding expertise,” said William Doherty, vice president of vinyl compounds at Georgia Gulf. Georgia Gulf has begun to introduce these new
flexible compounds to manufacturers of toys and decorative construction materials, and it is developing compounds for other applications. “The bio-based compounds are suitable for a variety
of consumer and industrial end products that would benefit from a non-phthalate solution, but won’t compromise on their ability to deliver specific proper- ties,” said Doherty. Earlier this year, Georgia Gulf announced plans to
Galata’s Drapex Alpha plasti- ciser can be used as an
alternative to conventional petroleum-
based products in applications such as wire and cable
develop a range of flexible bio-based PVC compounds using Drapex Alpha, a bio-sourced plasticiser from Galata Chemicals. The compounds are aimed at wire and cable, medical and general purpose applications. According to Galata president and CEO Luc de
Temmerman, working with Georgia Gulf will help it to speed up commercialisation of the Drapex Alpha product line. It can be used as an alternative to conventional
petroleum-based plasticisers in general purpose and speciality applications. It offers broadly similar cost and perform- ance attributes, says the com- pany. Specific benefits are said to include better extraction
resistance, reduced VOCs and enhanced processing. The product has already completed successful test
marketing trials, says Galata, and is available world- wide for incorporation into existing formulations.
Reflected glory Huntsman has commercialised an infrared-reflecting pigment, based on titanium dioxide, which allows polymer products of any colour to reflect solar energy. It is likely to find particular use in products like vinyl sidings and window profiles. Called Altiris, the additive can increase solar
reflection by more than 100% in some colour ranges, according to the company. In addition, surface tempera- tures can be reduced by more than 50% in certain colours. This can help to increase the lifespan of products as they stay cooler and suffer less from heat cycling stresses. Altiris can be used to make plastic products less prone to warping, allowing them to be used in warmer regions of the world. According to Huntsman, the pigment will allow
products to be made available in a wider range of colours. It can be applied in single extrusions or in coloured capstocks. The company adds that such applications can help to keep buildings cooler and more energy efficient. Altiris can also be used in a wide range of other resins and additional target applications include leisure products and automotive components. Rob Portsmouth, business development director at Huntsman, said: “The pigment delivers a unique set of benefits: superior tailored reflectance from a single additive and in any colour customers need.” Unlike conventional TiO2
, Altiris does not impart
whiteness and has been specifically engineered to provide infrared reflection. Two grades have been launched so far. Altiris 550 has high solar reflectance and is particularly suited to medium to light shades, while Altiris 800 is designed to have a combination of high infrared reflection and low tint reduction – making it suitable for use in dark and vibrant colours.
Huntsman has also developed software to help with the optimisation of colour formulations incorporating Altiris.
Click on the links for more information:
❙
www.unavarra.es ❙
www.emeraldmaterials.com ❙
www.clariant.com ❙
www.ggc.com ❙
www.segetis.com ❙
www.galatachemicals.com ❙
www.huntsman.com
30 PIPE & PROFILE EXTRUSION | May/June 2012
www.pipeandprofile.com
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