Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1992-11-12
1994-06-07
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
26417717, 26433118, 4251335, B29C 4706
Patent
active
053187377
ABSTRACT:
A method for preparing a plastic composite by feedblock coextrusion of a molten acrylic based capstock overlying and integrally bonded to an underlying structural plastic ply. The composition of the capstock contains from about 40 to about 88 wt. % of an acrylic polymer having a molecular weight of at least about 125,000 daltons, and from about 12 to about 60 wt. % of an acrylate-based impact modifier resin in the form of discrete multi-layered polymeric particles. The capstock composition has a melt flow index of about 0.4 to about 0.75 grams/10 minutes (ASTM Method D-1238, Condition I) and the underlying structural ply has substantially the same melt flow index as that of the capstock composition.
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Ludwig Edward G.
Post Robert L.
Trabert Loren D.
Haggard Richard A.
Rohm and Haas Company
Thurlow Jeffery
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