Printer Friendly

Flexible PVC stabilizers have low phenol, phosphite. (Additives).

Two new mixed-metal heat stabilizers for flexible PVC are designed to reduce yellowing in clear PVC and improve indoor air quality by reducing phenol emissions. Mark 4847 from Crompton Corp. in Middlebury, Conn., is a bariumzinc liquid stabilizer with low phenol content. It is designed for flexible vinyls requiring excellent processing stability and initial color hold. It reportedly also gives excellent resistance to "water blush" in clear, thick sheet for applications such as boat windows and rear windows in convertible car tops. It also resists calender-roll plate-out.

Moreover, this stabilizer is also said to have better synergy with uv absorbers such as benzotriazoles, which can interact with phenolics and cause yellowing. In clear wire coating, it is said to maintain excellent resistance to copper greening.

New Mark 4853 Ba-Zn is one of a new generation of stabilizers for general-purpose molding, extrusion, and calendering that have very low VOCs. It is aimed at indoor applications like wall coverings. Its low phosphite content reduces phenol emissions during processing. The company is also developing Ca-Zn stabilizers with reduced phosphite levels. All these products have higher metal content to make up for the reduction in phosphite. Tel: (203) 573-2000,
COPYRIGHT 2003 Gardner Publications, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2003, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Publication:Plastics Technology
Date:May 1, 2003
Previous Article:Non-blooming, non-fogging UV stabilizer for TPOs. (Additives).
Next Article:Static control system gets a power boost. (Auxiliaries).

Related Articles
Stabilizers, antioxidants: product lines reviewed.
PVC heat stabilizers.
Antioxidants. (Product Lines Reviewed).
Lead-free, low-VOC heat stabilizers for PVC.
'Cleaner,' more efficient additives for flexible and rigid PVC.
PVC heat stabilizers.

Terms of use | Privacy policy | Copyright © 2019 Farlex, Inc. | Feedback | For webmasters