Essen, Germany -- Evonik Industries is to build a plant in Marl, Germany, to make hydroxy-functionalised polybutadiene. The facility should be on stream in the autumn of 2012, said Essen-based Evonik.
Such liquid polybutadiene (HTPB) is used primarily in sealing compounds for insulating glass windows and in adhesives for automobile manufacture, the company notes.
With this plant, Evonik says, it will be able for the first time to offer hydroxyl-functionalised polybutadiene to its customers in the adhesives and sealant industries.
Evonik will market HTPB as Polyvest HT, and adds that this rounds off its polybutadiene range.
"We thereby want to strengthen our position as a solution provider for sustainable products for the adhesives and sealant industries," says Dr Thomas Haeberle, the member of Evonik's Executive Board responsible for the segment Resource Efficiency, in the company's anouncement.
The hydroxyl end group allows the material to be crosslinked using an isocyanate into a polyurethane.
Evonik commented that it already makes liquid unfunctionalised polybutadienes. "Thanks to our several years worth of experience in producing polybutadiene and our proximity to customers in the adhesives and sealants markets, we think the chances are good for successfully entering the HTPB market," said Dr Ulrich Küsthardt, head of the Coatings & Additives Business Unit.
Haeberle emphasised that "demand for products that help use resources more efficiently is high." Double- and triple-pane glazing in window construction, for which hydroxyl-functionalized polybutadiene is used in sealing compounds, improves insulation in home construction.
In adhesives for automotive manufacture, which bond various materials and composites to one another, Evonik said, HTPB helps make it possible to use plastics efficiently and safely in automobile construction. As a result of such efficiency, vehicle weight can be reduced by using more plastic, so that less fuel is burned.
This move expands Evonik's range of polyesters, polymethacrylates, amorphous poly-alpha-olefins, and liquid butadienes for the adhesive and sealant industries.
Other manufacturers of hydroxyl-functional butadienes are Sartomer and Cray Valley, both now part of Total Group.