Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1999-03-24
2000-08-08
Dawson, Robert
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524601, 524605, 26432817, 26433121, 264221, 264167, C08K 5098
Patent
active
061003204
ABSTRACT:
In a process for producing a profile by profile extrusion of a thermoplastic resin, a melt of the thermoplastic resin is extruded through a die to form the profile. The process is improved by utilizing a thermoplastic resin having a composition of from about 99.95 to about 98.0 weight percent amorphous or semicrystalline polyester and from about 0.05 to about 2.0 weight percent of a zinc salt of an organic acid. The improvement of the process is either by increasing speed or decreasing temperature of a profile extrusion process already operating at a maximum speed and/or temperature with experiencing melt fracture. When melt fracture is present in the profile extrusion process, a method for reducing melt fracture in a profile is accomplished by combining from about 99.95 to about 98.0 weight percent amorphous or semicrystalline polyester and from about 0.05 to about 2.0 weight percent of a zinc salt of an organic acid to form a melt, extruding the melt through an orifice of a die at a temperature and a speed to form an extruded article having a shape, and thereafter quenching the extruded article to form a profile.
REFERENCES:
patent: 4034013 (1977-07-01), Lane
patent: 4436860 (1984-03-01), Hepp
patent: 4925890 (1990-05-01), Leung et al.
patent: 5091457 (1992-02-01), Efner
patent: 5132353 (1992-07-01), Wallace
patent: 5178943 (1993-01-01), Asai et al.
patent: 5273810 (1993-12-01), Nakano et al.
patent: 5913999 (1999-06-01), Hayashida et al.
patent: 5914191 (1999-06-01), Hanson et al.
Mitsui Petrochemical Industries Company, Ltd., Japan Patent Application 2160861 (1990) (Derwent Abstract).
Sekisui Plastics Company, Ltd., Japan Patent Application 5230354 (1993) (Derwent Abstract).
H. Dallmann et al, Europe Patent Application 406727 (1991) (Derwent Abstract).
A. Ciaperoni et al, Belgium Patent Application 901419 (1985) (Derwent Abstract).
Japan Patent Application 59229314 (1984) assigned to Diafolil Company, Ltd. (Derwent Abstract).
Japan Patent 92021704 (1992) assigned to Mitsubishi Chemical Industries Ltd. (Derwent Abstract).
M. Hashimoto et al., Japan Patent Application 01318063 (1989) (Derwent Abstract).
Cobb Daniel Christopher
Mercer, Jr. James Wilson
Dawson Robert
Eastman Chemical Company
Gwinnell Harry J.
Peng Kuo-Liang
Tubach Cheryl J.
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