Hyperbranched fluoroelastomer additive

US9688786B2 · kind B2 · utility

Assignee

• SOLVAY SPECIALTY POLYMERS ITALY S.P.A. · IT

Inventors

• Matteo Fantoni · Rho, IT
• Giovanni Comino · Monza, IT
• Marco Apostolo · Novara, IT

Key dates

• Filing date: Jun 7, 2012
• Grant date: Jun 27, 2017
• Expiry date: Jul 28, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F214/265
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention pertains to a hyperbranched (per)fluoroelastomer [fluoroelastomer (B)] comprising recurring units derived from a bis-olefin [bis-olefin (OF)] having general formula (I): wherein R1, R2, R3, R4, R5 and R6, equal or different from each other, are H or C1-C5 alkyl; Z is a linear or branched C1-C18 alkylene or cycloalkylene radical, optionally containing oxygen atoms, preferably at least partially fluorinated, or a (per)fluoropolyoxyalkylene radical, said fluoroelastomer (B) having a slope in G′ curve such that the ratio: G′100/G′0.01 is of less than 10, when determined at 260° C. according to ASTM D4440 standard, wherein G′100 is the storage modulus at a shear rate of 100 rad/sec and G′0.01 is the storage modulus at a shear rate of 0.01 rad/sec, to compositions comprising the same, and to a process for their manufacture.