WEB EXCLUSIVE: “A profound step change in providing higher impact resistance in combination with high gloss” is how Dow Chemical Co. describes its new Paraloid KM-X100 impact modifier for PVC window profiles. This weatherable, all-acrylic modifier from Dow’s new Rohm and Haas subsidiary in Philadelphia incorporates process aid functionality. It reportedly allows lower use levels for cost reduction, provides a wider process window for lower melt temperatures, and also provides fast fusion for higher output rates. Use levels of 4 phr or less are said to provide excellent impact and gloss. The new product reportedly can reduce breakage in cutting, routing, and punching operations for window fabrication.
Another new acrylic impact modifier is Durastrength 619 from Arkema Inc., Philadelphia. It is said to be more efficient than existing acrylic modifiers or CPE, permitting lower overall formulation costs. This free-flowing powder reportedly provides excellent processability without processing aids.
Arkema’s PVC Additives Group also has three new butyltin heat stabilizers for rigid pipe and profiles. The newest is Thermolite 140 for coextruded siding and fence substrate, and all types of pipe and conduit. It reportedly confers good color stability to products stored in warm climates. It’s described as “one stabilizer that fits all” for multiple applications at the same use levels as higher-priced stabilizers with higher tin levels.
Also quite new is Thermolite 150 for high-output extrusion of window profiles and other demanding rigid applications. It reportedly can save money when used at the same levels as higher-cost, higher-tin stabilizers.
Cost savings are also possible by lowering tin content with two stabilizers that came out this past spring. Thermolite 130 and 135 are designed to permit use of one stabilizer for all sorts of pipe from thin-wall, high-shear products to large diameters. Thermolite 135, which has higher tin content than Thermolite 130, is also recommended for electrical and telephone conduit. Both products are NSF and PPI listed for potable water pipe.
(215) 592-3000 * www.rohmhaas.com
(800) 558-5575 * www.additives-arkema.com
Rohm and Haas Co.
P.O. Box 1310 Philadelphia, PA 19106