| 摘要 |
The invention relates to a biodegradable plastic having increased biodegradation speed. Said plastic comprises a) finely distributed particle of a biodegradable, water-soluble, organic component, and b) finely distributed particles of a water-soluble, inorganic component promoting the growth of microorganisms and comprising N, P, and/or S. Said plastic is particularly based on cellulose esters such as cellulose acetate. Preferable components A are water-soluble saccharides and/or water-soluble organic acids. Said particularly advantageous biodegradable plastic is particularly available in the form of fibers, films, injection molded items, granulate beads, and containers. Controlled-release biocides and/or fertilizers can also be included in the molded part, wherein the molded part is degraded faster in the environment as said ingredients are released. The accelerated biodegradation is based on a synergistic interaction of the components indicated. |
| 主权项 |
1. A biodegradable plastic with an increased biodegradation speed, comprising: a polymer, and
(a) approximately 0.1 to 40% by weight of finely distributed particles of a biodegradable, water-soluble, organic component with a mean particle size of less than 10 μm and (b) finely distributed particles of a water-soluble, inorganic component containing N, P and/or S, promoting the growth of microorganisms and with a mean particle size of less than 10 μm, wherein the component (a) is a water-soluble saccharide, a water-soluble organic acid and/or a water-soluble nitrogen compound, wherein the water-soluble saccharide is saccharose, glucose, maltose and/or lactose, wherein the water-soluble organic acid is oxalic acid, malonic acid, glutaric acid, adipic acid, malic acid, tartaric acid, citric acid, ascorbic acid and/or amino carboxylic acids, and wherein the water-soluble organic nitrogen compound is urea, guanidine, hexamethylenetetramine, glycine and/or alanine; wherein the polymer is a cellulose ester, polylactide, polycaprolactone and/or polyhydroxybutyric acid. |
