Please visit: Dow Plastics Additives, Performance Division
100 Independence Mall W
Philadelphia, PA 19106-2399 US
Paraloid and Paraloid EXL are all-acrylic or MBS impact modifiers for vinyl and other engineering resins. Paraloid KM-300, Paraloid KM-5000/4000 series and the premium Paraloid KM-X100Pro all-acrylic impact modifiers add toughness, color retention and weatherability to vinyls for long-term outdoor exposure. KM-X100Pro and KM-5450 include processing aid. Paraloid KM-377 acrylic impact modifier can reduce gloss significantly. Specialized additives or processing is not necessary to attain a premium wood-like siding surface. Paraloid KM-377 will also narrow the variability in gloss due to processing variations. Paraloid BTA-700 series MBS impact modifiers give superior toughness in nonweatherable applications. BTA-736S offers high-impact efficiency with superior clarity and good resistance to crease whitening. BTA-753ER gives maximum toughness at ambient or low temperature in general-purpose opaque vinyl. Paraloid EXL-3300 series acrylic tougheners are for weatherable applications of engineering resins requiring good color retention. EXL-3330 offers good inherent thermal stability, resistance to uv degradation, and balance of toughness. EXL-3361 gives enhanced thermal stability and good balance of properties including colorability. Paraloid EXL-3600 series MBS tougheners for engineering resins give superior low-temperature impact resistance. EXL-3611 is a reactive toughener for nylon. EXL-3691A is a general-purpose toughener providing a balance of low-temperature impact resistance and modulus for engineering resins. The Paraloid series of specialty and multifunctional additives are designed for adding only one product to the blending operation. Paraloid KM-5450 and Paraloid KM-X100Pro contain impact modifier and processing aids. Paraloid multifunctional additives are blended in a liquid state and isolated into powder as one product. This ensures accurate ratios of the components and consistent performance.
Nearly 50 new PVC compounds that incorporate new biobased, non-phthalate plasticizers and other formulation enhancements that address the “green” concerns of wire and cable users will be introduced commercially in the first quarter of 2013 by Teknor Apex Co., Pawtucket, R.I.
A number of major businesses have changed hands recently.
A new acrylic cell stabilizer for rigid PVC foam sheet is said to reduce additive usage by 10% to 15% or else produce lower-density foam with performance equal to higher densities.
New acrylic-based impact modifiers are optimized to address different aspects of vinyl window profile performance.
Dow Chemical Co., Midland, Mich., has signed a definitive agreement to acquire Rohm and Haas of Philadelphia.
Plastics are going “green,” but they will need some help to get there. Biodegradable polymers derived from renewable resources are attracting lots of interest and publicity, but that enthusiasm is counterbalanced by persistent questions of availability, cost, performance, and processability. All these issues are inter-related: Increasing demand will lead to more capacity, which will presumably lead to lower prices. But the foundation is market demand, which ultimately depends on whether biopolymers will have the performance properties and processability to compete with existing non-renewable plastics.
A proprietary impact modifier is said to toughen PLA (polylactic acid) biopolymer without sacrificing clarity.
Wood-plastic composites, or WPCs, are already a 1.3-billion-lb market and are growing at 20% annually.
Making high-strength composites less expensively was the dominant theme of the recent Composites 2003 Show in Anaheim, Calif., sponsored by the American Composites Manufacturers Association (formerly the Composites Fabricators Association). Among the stars of the show were the vacuum infusion process (VIP), along with a number of new resins—including several non-traditional material chemistries—and new initiators. (New reinforcements, fillers, additives, and equipment will be covered in future articles.)The closed-mold VIP method is attracting a growing following from spray-up fabricators who want to meet the EPA’s MACT (Maximum Achievable Control Technology) standards for hazardous air-pollutant (HAP) emissions, which take effect in 2006.