Patent ID: 8431628

Claim:
An environmentally degradable composite, comprising: a) between 20 and 80 weight parts of a environmentally degradable cross-linked polyesteramide comprising random blocks, said environmentally degradable cross-linked polyesteramide being represented by the following formula: wherein m is an integer between 2 and 10; n is an integer between 2 and 12; p, q, and r are integers between 2 and 12; x is an integer between 1 and 10; y is an integer between 1 and 10; and said environmentally degradable cross-linked polyesteramide has a degree of cross-linking of from 0.1% to 5%; b) between 10 and 70 weight parts of a renewable raw material; c) between 5 and 20 weight parts of an additive, said additive being a mixture of a plasticizer, a heat stabilizer, a lubricant, and an antioxidant, wherein said plasticizer is glycerol, ethylene glycol, sorbitol, xylitol, maltitol, diethylene glycol, polyethylene glycol, fatty acid monoglyceride, urea, or a mixture thereof; said heat stabilizer is calcium stearate, zinc stearate, barium stearate, dibutyltin dilaurate, dioctyltin dilaurate, Ca—Zn compound stabilizer, or a mixture thereof; said lubricant is ethylene bis stearamide, polyethylene wax, oxidized polyethylene wax, polypropylene wax, liquid paraffin, or a mixture thereof; and said antioxidant is pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 2,2′-methylenebis(6-tert-butyl-4-methylphenol), triethylene glycol-bis(3-(3-tert-butyl-4-hydroxy-5-methyphenyl)propionate), or a mixture thereof; and d) between 0 and 30 weight parts of a filler; wherein: the environmentally degradable composite has a tensile strength of between 15 and 30 MPa, an elongation at break of between 300 and 1000%, a bending strength of between 10 and 25 MPa, and a notched impact strength of between 20 and 90 kJ/m 2 .