β Crystalline polypropylenes

US7423088B2 · kind B2 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Dietmar Mäder · Oberursel, DE
• Kurt Hoffmann · Taufkirchen, DE
• Hans-Werner Schmidt · Bayreuth, DE

Key dates

• Filing date: May 22, 2003
• Grant date: Sep 9, 2008
• Expiry date: Jun 24, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A composition containing (1) a crystalline polypropylene resin and (2) one or more β-nucleating agents of the formula (I), wherein R1, R2 and R3, independently of one another, are C1-C20alkyl, C2-Calkyl substituted by C1-C10alkylamino, di(C1-C10alkyl)amino, C1-C10alkyloxy or hydroxy; C3-C20alkenyl, C5-C12cycloalkyl, C5-C12Cycloalkyl substituted by 1, 2 or 3 C1-C10alkyl; cyclohexylmethyl; cyclohexylmethyl substituted by 1, 2 or 3 C1-C10alkyl; C5-C9cycloalkenyl, C5-C9cycloalkenyl substituted by 1, 2 or 3 C1-C10alkyl; phenyl substituted by 1, 2 or 3 radicals selected from the group consisting of C1-C10-oalkyl, C1-C10alkyloxy, hydroxy, halogen, trihalogenmethyl, trihalogenmethoxy, benzoyl, phenylamino, acylamino and phenylazo; C7-C9phenylalkyl, C7-C9phenylalkyl which is substituted on the phenyl by 1, 2 or 3 radicals selected from the group consisting of C1-C10alkyl, C1-C10alkoxy and hydroxy; naphthyl, naphthyl substituted by C1C10alkyl, adamantyl, or a 5 to 6 membered heterocyclic group; characterized in that the polypropylene resin has a content of β-form crystals of at least 10% calculated by means of the following equation β-form crystal content (%)=100×Pβ1,/(Pa1+Pa2+Pa3+Pβ1) where…