Polyester-grafted starch-polymer alloy

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

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524 51, 525 5424, 525 5431, 527300, 527304, 536107, 536110, 536115, 536119, 536126, C08L 300

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active

057192146

ABSTRACT:
A polyester-grafted starch-polymer alloy is capable of imparting practical flexibility and toughness to moldings with no or only a little plasticizer. The polyester-grafted starch-polymer alloy comprises a blend of a polyester-grafted starch (a starch which has polyester graft chains on the starch molecule, with the terminal hydroxyl groups of the polyester graft chains and the hydroxyl groups connected directly to the starch entirely or partly blocked with the ester group) and an independent polyester (a polyester which is constructed of the same unit as said polyester graft chain, with its terminal hydroxyl groups entirely or partly blocked with the ester group) which are uniformly mixed together. A method of preparing the alloy and thermoplastic resin compositions containing the alloy also are disclosed.

REFERENCES:
patent: 3795670 (1974-03-01), Mark et al.
patent: 4891404 (1990-01-01), Natayan et al.
patent: 5367067 (1994-11-01), Frische et al.
patent: 5462983 (1995-10-01), Bloembergen et al.
patent: 5525671 (1996-06-01), Ebato et al.
patent: 5578691 (1996-11-01), Narayan et al.
A. M. Mark and C. L. Mehltretter, Die Starke 22, Jahrg, 1970/Nr. (pp. 108-110). Publication discussing the acetylation of high-amylose corn starch.
A. M. Mark and C. L. Mehltretter, Die Starke 24, Jahrg, 1972/Nr. 3 (pp. 73-76). Publication discussing preparation of statch triacetates.
Journal of Applied Polymer Sciences, vol. 22, 1978 (pp. 459-465). "A New Biodegradable Plastic Made from Starch Graft Poly (methyl acrylate) Copolymer". Publication discussing grafted starch-based, biodegradable plastics.

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