Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1984-02-15
1985-11-19
Seccuro, Carman J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C08L 2320
Patent
active
045543216
ABSTRACT:
Films of low ether solubles content, satisfactory mechanical properties, and a greatly improved heat seal impact strength can be made from butene-1 polymers which are stereoregular, predominantly isotactic, thermoplastic elastomers (referred to herein as SEPB) and from blends of these polymers with conventional copolymers of butene-1 with small amounts of ethylene (PBE). Because of the low ether solubles content the films are useful for food and medical packaging.
Films of low ether solubles content, satisfactory mechanical properties, and excellent heat seal impact strength are produced from SEPB and preferably from blends of SEPB with small amounts of polypropylene and, optionally, high density polyethylene or a crystallization nucleating agent.
Mechanical properties of SEPB films are improved by addition of conventional PBE. Conversely, the heat seal impact strength of conventional PBE films is greatly improved and mechanical properties are synergistically improved by addition of minor proportions of SEPB.
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Hwo Charles C.
Klingensmith George B.
Martone John A.
Daunis Jennifer R.
Seccuro Carman J.
Shell Oil Company
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