THERMOPLASTIC COMPOSITION WHICH IS BASED ON CLEAR THERMOPLASTIC (CO) POLYMER CONTAINING POLYAMIDE PARTICLE AND IS USABLE FOR LIGHT-SCATTERING MOLDED ARTICLE

• Main Authors: MARCARIAN XAVIER, PERRAUD ERIC, MAGNE JACQUES, BRUNEAU JEAN-MICHEL
• Format: Patent
• Language: English
• Published: 18.05.1999
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

PROBLEM TO BE SOLVED: To obtain a thermoplastic compsn. which can be used for producing molded articles (esp. sheets) for light waveguide channels or light-scattering apparatus by incorporating a specified amt. of polyamide particles having specified particles sizes into a compsn. based on a clear thermoplastic material. SOLUTION: This thermoplastic compsn. for light-scattering molded articles is based on a clear thermoplastic material [e.g. a (meth)acrylic (co)polymer, polycarbonate, polystyrene, or (glycol-modified) polyethylene telephthalate] and contains 20-1,000 ppm (based on the compsn.) polyamide particles having an average particles size of 0.4-200 μm. Pref., the polyamide particles have such a narrow particles size distribution that 90% or higher of the particles are in the range of 2.5-10 μm. Pref., the compsn. contains 100-200 ppm polyamide particles. A polyamide prepd. from a lactam, from an amino acid, or from a diamine and a dicarboxylic acid can be used. The compsn. can be prepd. by blending with a Brabender-type mixer, a screw extruder, etc.