Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1993-11-23
1995-10-24
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 50, 524 51, 524 52, 524322, 524394, 524398, 523126, 523128, 525 5426, C08L 306, C08L 308, C08L 300, C08K 509
Patent
active
054610931
ABSTRACT:
In the present invention, the lowering of physical properties is minimized by bonding matrix resin and starch chemically using a coupling agent in the presence of an organic acid catalyst, at the same time lowering of the production cost is achieved by simplyfing the process. In the prior arts, the problems associated with low physical properties caused by starch incorporation were approached only in terms of enhanced physical interacting strength between matrix resin and starch.
The purposes of the present invention are to provide a biodegradable polyethylene composition chemically bonded with starch comprising 100 parts by weight of matrix resin, 5-400 parts by weight of biodegradable incorporating material, 0.01-10 parts by weight of coupling agent, 0.01-1.0 parts by weight of radical initiator, 0.01-5 parts by weight of Lewis acid catalyst, 0.01-10 parts by weight of autoxidizing agent and 0.01-10 parts by weight of plasticizer and to provide a process for preparing thereof.
The biodegradability of the polyethylene composition prepared by the present invention was determined in addition with reclamation test and shown to be excellent at a content of more than 10 wt. % of starch.
REFERENCES:
patent: 4931488 (1990-06-01), Chiquet
patent: 5162392 (1992-11-01), Woo et al.
patent: 5262458 (1993-11-01), Bastioli et al.
Cho Won-yung
Kim Yong-wook
Yoo Yong-deuk
DeWitt LaVonda R.
Michl Paul R.
Yukong Limited
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