Engineers at the Specialty Polymers Division of GenCorp Inc. are working on an in-mold paint that offers ultraviolet stability and eliminates the need for a separate primer step, according to Paul Hardy, technical sales associate. Hardy, interviewed at the GenCorp booth at the Society of the Plastics Industry Inc. Composites Institute conference, said the process for compression molding of composites could be commercialized within five to six years. He said the process probably would be used first in markets such as appliances, sinks and bathtubs.
``We've come a long way with development. We're ready to make some parts,'' he said.
In Cincinnati, GenCorp was showing a technology already commercialized, an in-mold coating called Gen Glaze. It is now being used as a primer in automotive, truck and marine markets, Hardy said. Parts come out of the mold and go directly to the top-coat painting stage, he said.
The Specialty Polymers Division of Fairlawn, Ohio-based GenCorp is in Akron, Ohio.
Ashland introduces 40% recyclate resin
Ashland Chemical Co. claims its new polyester resins contain the highest amount of post-consumer recycled chemical content.
Ashland's Composite Polymers Division in Dublin, Ohio, introduced the Envirez 6215 and 8030 polyester resins that contain up to 40 percent recyclate raw materials.
The resins can be processed in sheet and bulk molding compounds, resin-transfer molding, and wet and pultrusion molding.
Both perform well with a variety of low-profile and shrink-control additives, the company said.
The resins are recommended for truck body panels and skins, structural parts and general-purpose applications.
The division also introduced Envirez 2431 low-profile additive used in SMC press molding formulations.
The new additive contains 25 percent post-consumer recyclate content, and is efficient for shrink control.