BAYER MATERIALSCIENCE LLC INTRODUCES NEW SPRAY POLYURETHANE FORMULATION FOR PART REINFORCEMENT

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BAYER MATERIALSCIENCE LLC INTRODUCES NEW SPRAY POLYURETHANE FORMULATION FOR PART REINFORCEMENT
17 June 2004 - Bayer MaterialScience AG

Bayer MaterialScience LLC announces its new Baytec® RS polyurethane material. The Baytec RS system is a multi-layer polyurethane technology designed for reinforcing acrylic and ABS parts in applications ranging from spas to bathtubs to architectural parts such as garage doors.

The Baytec RS system uses open mold processing. It is sprayed onto the back of formed acrylic or ABS parts, providing reinforcement without the use of glass fiber. This eliminates the need for hand roll-out of the fiber and helps to cut cycle time. Curing is also faster. While an FRP material may take an hour to be ready to trim, parts reinforced with Baytec RS material are ready in 15 minutes.

'Costs are reduced in several ways with this material,' said Harry George, specialty RIM business group leader. 'The single, open mold reduces tooling cost, labor costs for hand roll-out of fiber reinforcing materials are eliminated, and cycle time is cut, meaning greater productivity.

'The fact that there are no solvents is another key benefit,' George added.

The Baytec RS system provides high flexural modulus and features ease of processing. It can be applied at and cures at room temperature, with a gel time of about 2 minutes, and does not require post-curing. It is processed using three-stream low-pressure metering and mixing machinery.

The material is applied as a 'sandwich' - two solid layers with a cellular layer in between. The 'sandwich' can be from 1/2- to 3/4-inch thick.

After curing, the Baytec RS material offers hardness up to 80 Shore D. The flexural strength that would otherwise be provided by glass fiber reinforcing is replaced in the Baytec RS system by a proprietary blend of structural fillers blended into the polyol used in the formulation, said George. He added that the sandwich construction also provides slightly higher impact strength to the completed part.

George said that Baytec RS material can also be applied onto a gel coat in a mold in addition to serving as a backing for pre-formed acrylic or ABS parts.

'Lower-cost tooling - one polished surface or a thermoformed piece of plastic - that's what you're spraying onto - instead of having a two-sided mold and the press and clamping pressure and associated costs,' George said. 'In some cases manufacturers can even use molds currently being used for FRP materials.'

http://www.bayermaterialscience.com

About: Bayer MaterialScience AG
Bayer Corporation, headquartered in Pittsburgh, is part of the worldwide Bayer Group, an international health care, nutrition and innovative materials group based in Leverkusen, Germany. Bayer employs 23,300 in North America with net North American sales of 8.8 billion euros in 2003. Bayer’s three operating business areas – HealthCare, CropScience and MaterialScience, improve people’s lives through a broad range of essential products that help diagnose and treat diseases, protect crops and advance automobile safety and durability.

Bayer MaterialScience AG is one of the world's largest producers of polymers and high-performance plastics. The main customers for Its innovative developments in coatings, adhesives, insulating materials and sealants, polycarbonates and polyurethanes are the automotive and construction industries, the electrical/electronics segment and manufacturers of sports and leisure goods, packaging, and medical devices.

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