Reduced melt viscosity rigid polyvinylchloride (PVC)...

Details Reduced melt viscosity rigid polyvinylchloride (PVC)... Reduced melt viscosity rigid polyvinylchloride (PVC)...

2005-02-08

2009-08-11

Zemel, Irina S (Department: 1796)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S191000, C525S227000, C525S241000

Reexamination Certificate

active

07572862

ABSTRACT:
The invention relates to a process aid for use in rigid thermoplastic compositions, and especially in rigid polyvinylchloride (PVC) compositions. The process aid is an acrylic terpolymer of methylmethacrylate, butyl acrylate and styrene at an optimal ratio to produce a significant reduction in melt process viscosity. The resulting reduction in extrusion melt torques enables manufacturers of rigid PVC products to have higher throughput production rates.

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Murphy, J. “Additives for Plastics Hanbook (2ndEdition)” Elsevier, published in 2001 (Chapter 16 provided).

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