Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1996-08-28
1998-03-10
Szekely, Peter A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523124, 524394, 525186, 525190, 525415, 525450, 525479, C08K 509, C08L 2308, C08L 6704, C08L 8308
Patent
active
057262209
ABSTRACT:
The present invention provides polylactic compositions effecting an excellent mold releasability upon processing and significantly improved elongation at break and impact strength without affecting the transparency. Also provided is a shrink film which decomposes under the natural environment and has excellent transparency, flexibility, shrinkability and mold releasability upon processing by applying the polylactic acid composition to a shrink film. There is provided a biodegradable polymer composition comprising 100 parts by weight of polylactic acid and 5 to 70 parts by weight of EVA. Further, a biodegradable polymer composition is provided comprising the polymer composition with one or more additives selected from the group consisting of 0.05 to 5 parts by weight of a lubricant, 1 to 50 parts by weight of plasticizer, 0.5 to 5 parts by weight of thermal stabilizer and 0.05 to 5 parts by weight of mold releasing agent. These biodegradable polymer compositions are applied to shrink films.
REFERENCES:
patent: 5252646 (1993-10-01), Iovine et al.
patent: 5387623 (1995-02-01), Ryan et al.
patent: 5470526 (1995-11-01), Wilfgong et al.
Nakamura Norio
Tanifuji Yoichi
Tokushige Yuji
Ueda Shuhei
Shin-Etsu Chemical Co. , Ltd.
Szekely Peter A.
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