Controlled rheology polypropylene heterophasic copolymers

Details Controlled rheology polypropylene heterophasic copolymers Controlled rheology polypropylene heterophasic copolymers

2011-03-08

2011-03-08

Rabago, Roberto (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S387000

Reexamination Certificate

active

07902300

ABSTRACT:
This invention relates to the use of a cyclic ketone peroxide of half-life time larger than one second at a temperature of 225° C., for producing a controlled rheology polypropylene heterophasic copolymer of melt index MI2 larger than 15 g/10 min, having simultaneously a very high impact resistance and a high flexural modulus.

REFERENCES:
patent: 3887534 (1975-06-01), Baba et al.
patent: 4493923 (1985-01-01), McCullough, Jr.
patent: 4704524 (1987-11-01), Masaki et al.
patent: 4705818 (1987-11-01), Kawai et al.
patent: 4707524 (1987-11-01), Ehrig et al.
patent: 4734448 (1988-03-01), Kasahara et al.
patent: 5447985 (1995-09-01), DeNicola, Jr. et al.
patent: 5459201 (1995-10-01), Shroff et al.
patent: 5530073 (1996-06-01), Schoenberg
patent: 5602206 (1997-02-01), Gunesin et al.
patent: 5656691 (1997-08-01), Niki et al.
patent: 5705568 (1998-01-01), Gahleitner et al.
patent: 5840808 (1998-11-01), Sugimura et al.
patent: 5932660 (1999-08-01), Meijer et al.
patent: 6015854 (2000-01-01), McCullough, Jr.
patent: 6358435 (2002-03-01), Schuurman et al.
patent: 6610792 (2003-08-01), Albe et al.
patent: 6723829 (2004-04-01), Malm et al.
patent: 2110441 (1993-12-01), None
patent: 0597461 (1994-05-01), None
patent: 1 186 618 (2002-03-01), None
patent: 2193840 (1974-02-01), None
patent: 48079851 (1973-10-01), None
patent: 07033916 (1995-02-01), None
patent: P19990075714 (1999-10-01), None
patent: 96/20247 (1996-07-01), None
patent: 97/49759 (1997-12-01), None
patent: 01/36502 (2001-05-01), None
patent: 03/042257 (2003-05-01), None
Ryu, S.H., et al., “Parameters Affecting Process Efficiency of Peroxide-Initiated Controlled Degradation of Polypropylene”, Advances in Polymer Technology, John Wiley and Sons, Chichester, GB, XP000323082; ISSN: 0730-6879, vol. 11, No. 2, 1991, pp. 121-131.
Roegiers, Kristien, U.S. Appl. No. 11/401,189, filed Apr. 10, 2006, “Impact Strength Polypropylene,”.
Y. Feng and J.N. Hay, “Phase Separation in a Commercial Block Propylene-Ethyleme Copolymer,” vol. 39, (1998) 5277-5280.
“Polypropylene Handbook,” (E.P. Moore Jr., Ed.), 1999, p. 92.

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