Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-02-15
2005-02-15
Choi, Ling-Siu (Department: 1713)
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
06855777
ABSTRACT:
A process is provided for the production of a very low melt viscosity (high melt flow index) polymer resin, suitable for use in meltblown processing. According to the process of the current invention, a high melt viscosity (low melt flow index) resin is subjected to post-reactor molecular weight alteration by extrusion with a chemical prodegradant. The process produces a very low melt viscosity resin that can be used in meltblown processing without further treatment to reduce the average molecular weight of the resin. Further, the very low melt viscosity resins produced according to the process of the current invention contain very little or no residual prodegradant.
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Ethylene-propylene copolymers with high flow index. Popisil, Ladislav; Pac, Jiri; Petruj, Jaroslav; Sula, Karel; Ottis, Jiri; Sulc, Zdenek. Czech. CS 239,716 (Cl. C08F8/50), Apr. 15, 1987, Appl. 84/595, Jan. 26, 1984; 6 pp.
Boettger John A.
Gabor Theodore
McLoughlin Kimberly M.
Tarr Gary R.
Townsend, IV Edwin B.
Buchanan & Ingersoll PC
Choi Ling-Siu
Koons, Jr. Robert A.
McWilliams Matthew P.
Sunoco Inc. (R&M)
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