| 摘要 |
Disclosed are polypropylene articles with improved optical properties and/or an increased temperature of crystallization comprising a polypropylene resin and uniformly dispersed therein from about 1 ppm to about 10 ppm of one or more polycyclic organic pigments selected from blue, green, magenta, red, yellow, orange and violet polycyclic organic pigments and from about 50 ppm to about 250 ppm of one or more aromatic trisamide nucleating agents, where the ppm levels are by weight based on the weight of the polypropylene resin. The polypropylene is for example polypropylene homopolymer. The articles exhibit reduced haze, increased temperature of crystallization and excellent clarity. |
| 主权项 |
1. A polypropylene article with improved optical properties and/or an increased temperature of crystallization comprising
a polypropylene resin and uniformly dispersed therein from about 1 ppm to about 10 ppm of one or more pigments selected from blue, green, magenta, red, yellow, orange and violet polycyclic organic pigments, and from about 50 ppm to about 250 ppm of one or more aromatic trisamide nucleating agents, wherein if the pigments comprise copper phthalocycanine or quinacridone pigments, each is from about 1 ppm to about 4 ppm, wherein the ppm levels are by weight based on the weight of the polypropylene resin, and wherein the aromatic trisamide nucleating agents are of formula (IIa) wherein R10, R20 and R30 independently of one another are C1-C20alkyl unsubstituted or substituted by one or more hydroxy; C2-C20alkenyl unsubstituted or substituted by one or more hydroxy; C2-C20alkyl interrupted by oxygen or sulfur; C3-C12cycloalkyl unsubstituted or substituted by one or more C1-C20alkyl; (C3-C12cycloalkyl)-(C1-C10alkyl) unsubstituted or substituted by one or more C1-C20alkyl; bis[C3-C12cycloalkyl]-(C1-C10alkyl) unsubstituted or substituted by one or more C1-C20alkyl; a bicyclic or tricyclic hydrocarbon radical with 5 to 20 carbon atoms unsubstituted or substituted by one or more C1-C20alkyl; phenyl unsubstituted or substituted by one or more radicals selected from C1-C20alkyl, C1-C20alkoxy, C1-C20alkylamino, di(C1-C20alkyl)amino, hydroxy and nitro; phenyl-(C1-C10alkyl) unsubstituted or substituted by one or more radicals selected from C1-C20alkyl, C3-C12cycloalkyl, phenyl, C1-C20alkoxy and hydroxy; phenylethenyl unsubstituted or substituted by one or more C1-C20alkyl; biphenyl-(C1-C10alkyl) unsubstituted or substituted by one or more C1-C20alkyl; naphthyl unsubstituted or substituted by one or more C1-C20alkyl; naphthyl-(C1-C10alkyl) unsubstituted or substituted by one or more C1-C20alkyl; naphthoxymethyl unsubstituted or substituted by one or more C1-C20alkyl; biphenylenyl; fluorenyl; anthryl; a 5- to 6-membered heterocyclic radical unsubstituted or substituted by one or more C1-C20alkyl; a C1-C20hydrocarbon radical containing one or more halogen; or tri(C1-C10alkyl)silyl(C1-C10alkyl); with the proviso that at least one of R10, R20 and R30 is branched C3-C20alkyl unsubstituted or substituted by one or more hydroxy; C2-C20alkyl interrupted by oxygen or sulfur; C3-C12cycloalkyl unsubstituted or substituted by one or more C1-C20alkyl; (C3-C12cycloalkyl)-(C1-C10alkyl) unsubstituted or substituted by one or more C1-C20alkyl; a bicyclic or tricyclic hydrocarbon radical with 5 to 20 carbon atoms unsubstituted or substituted by one or more C1-C20alkyl; phenyl unsubstituted or substituted by one or more radicals selected from C1-C20alkyl, C1-C20alkoxy, C1-C20alkylamino, di(C1-C20alkyl)amino, hydroxy and nitro; phenyl-(C1-C10alkyl) unsubstituted or substituted by one or more radicals selected from C1-C20alkyl, C3-C12cycloalkyl, phenyl, C1-C20alkoxy and hydroxy; biphenyl-(C1-C10alkyl) unsubstituted or substituted by one or more C1-C20alkyl; naphthyl-C1-C10alkyl) unsubstituted or substituted by one or more C1-C20alkyl; or tri(C1-C10alkyl)silyl(C1-C10alkyl). |
