Biodegradable plastics, method for production thereof and use thereof
US9637608B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2013 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Mar 4, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention concerns a plastic composition which is biodegradable, and which does not discharge contaminants during incineration or leave plastic fragments after decomposition. According to the invention the composition comprises: (i) 30-50% by weight of a polyester which is biodegradable and/or decayable; (ii) 20-40% by weight of starch from vegetable oil origin from corn, potatoes, and/or sunflower; (iii) 20-40% by weight of a filler composition comprising dolomite and/or calcium carbonate, wherein the filler composition particles have a polished surface; and (iv) 1-5% by weight of a binding agent comprising a resin ester of vegetable origin; wherein said polyester and said starch together form a bioplastic base composition and together comprise 55-79% by weight of the total weight of said plastic composition. The present invention further concerns a method for preparing said plastic composition; a plastic film prepared of said plastic composition; and a waste bag prepared of said plastic film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.