Patent ID: 6537478
Filing Date: 2003-03-25
Classification: A61M,B29C,C08F,C08L,F25D,G11B,Y10T

Abstract:
Injection-molded CD packaging or injection-molded CD-ROM packaging comprising an essentially isotactic homopolymer of propylene or a copolymer of propylene with C2-C10-alk-1-enes, which polymer is obtained by polymerization of the corresponding monomers using metallocene catalysts, wherein the homopolymer of propylene has(1) a Melt Flow Rate of 40-80 g/10 min. (measured at 230Â° C. with a load of 2.16 kg in accordance with DIN 53735); (2) a molecular weight distribution of 1.2 to 2.5 (Mw/Mn); (3) a melting point of 140-165Â° C. (DSC); (4) a pentad content mmmm of 80% to 98% (determined by 13C-NMR); (5) a xylene-soluble content of less than 1% by weight; (6) an E modulus of 1500 to 7000 (measured in a tensile test by ISO 527); and (7) a haze of less than 8% (determined by ASTMD 1003), and wherein the copolymer of propylene has(1) a Melt Flow Rate of 40-80 g/10 min.; (2) a melting point of 100Â° to 150Â° C. (DSC); (3) a Mw/Mn ratio of 1.2 to 2.5; (4) a xylene-soluble content of less than 1% by weight; (5) a chemically bound proportion of comonomer in the range of 0.01 to 15 mol %; (6) an E modulus, measured in a tensile test, in the range of from 1500 to 7500 (tensile test in accordance with ISO 527); and (7) haze of less than 8% (determined in accordance with ASTM D 1003).