Lignocellulosic composites

Details Lignocellulosic composites Lignocellulosic composites

2007-01-16

2007-01-16

Theisen, Mary Lynn (Department: 1732)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C264S109000

Reexamination Certificate

active

10119592

ABSTRACT:
Lignocellulosic-based woodfiber-plastic composite products containing a pesticidal amount of calcium borate is resistant to attack by wood destroying fungi and insects. The preferred calcium borates are the calcium polytriborates having a CaO:B2O3molar ratio of about 2:3 and calcium hexaborates, having a CaO:B2O3ratio of 1:3. Composites can be produced by combining the calcium borate with particles of the lignocellulosic material and the thermoplastic resin binder, and heating and extruding the resultant mixture through a die to form the composite product.

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