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US 6,096,809 AGranted
Biologically degradable polymer mixture
AssigneeBio-Tec Biologische Naturverpackungen GmbH
InventorsJurgen Lorcks, Winfried Pommeranz, Harald Schmidt
Life of this patent
Estimating the term…
Abstract
A biologically degradable polymer mixture contains at least one starch biopolymer made from renewable raw materials, a plasticizer, and a polymer selected from the following materials: an aromatic polyester; a polyester-copolymer with both aliphatic and aromatic blocks; a polyesteramide; a polyglycol; a polyester urethane; and/or mixtures of these components.
Claims30
A composition of matter that is at least partially biodegradable comprising:
- thermoplastic starch formed by mixing starch and at least one plasticizing agent under conditions that result in the formation of a thermoplastic melt so that the thermoplastic melt has a water content of less than 5% while in a melted state, wherein the plasticizing agent is selected from the group consisting of glycerin, sorbitol, sugar alcohols, hydroxy acids, playvinyl alcohol, and mixtures thereof;
- and
- at least one polymer selected from the group consisting of aromatic polyesters, polyester copolymers having both aliphatic and aromatic blocks, polyester amides, polyethylene oxide polymers, polyglycols, and polyester urethanes,
- wherein the composition is formed by melting and mixing the thermoplastic starch and the at least one polymer under conditions that reduce or maintain the water content of the composition at less than about 1% by weight while in a melted state.
1 more element
A composition of matter that is at least partially biodegradable comprising:
- thermoplastic starch formed by mixing starch and at least one plasticizing agent under conditions that result in the formation of a thermoplastic melt so that the thermoplastic melt has a water content of less than 5% while in a melted state, wherein the plasticizing agent is selected from the group consisting of glycerin, sorbitol, sugar alcohols, and mixtures thereof;
- and
- at least one polymer selected from the group consisting of aromatic polyesters, polyester copolymers having both aliphatic and aromatic blocks, polyester amides, polyethylene oxide polymers, polyglycols, and polyester urethanes,
- wherein the composition is formed by melting and mixing the thermoplastic starch and the at least one polymer under conditions that reduce or maintain the water content of the composition at less than about 1% by weight while in a melted state.
1 more element
A composition of matter that is at least partially biodegradable comprising:
- thermoplastic starch formed by mixing starch and at least one plasticizing agent under conditions that result in the formation of a thermoplastic melt so that the thermoplastic melt has a water content of less than 5% while in a melted state, wherein the plasticizing agent is selected from the group consisting of glycerin, sorbitol, sugar alcohols, hydroxy acids, polyvinyl alcohol, and mixtures thereof;
- at least one polymer selected from the group consisting of aromatic polyesters, polyester copolymers having both aliphatic and aromatic blocks, polyester amides, polyethylene oxide polymers, polyglycols, and polyester urethanes;
- and
- a phase mediator comprising at least one condensation reaction product of the thermoplastic starch and the at least one polymer,
- wherein the composition is formed by melting and mixing the thermoplastic starch and the at least one polymer under conditions that reduce or maintain the water content of the composition at less than about 1% by weight while in a melted state.
2 more elements
A composition of matter that is at least partially biodegradable comprising:
- thermoplastic starch formed by mixing starch an at least one plasticizing agent under conditions that result in the formation of a thermoplastic melt so that the thermoplastic melt has a water content of less than 5% while in a melted state, wherein the plasticizing agent is selected from the group consisting of glycerin, sorbitol, sugar alcohols, hydroxy acids, polyvinyl alcohol, and mixtures thereof;
- and
- at least one polyesters copolymer having both aliphatic and aromatic blocks,
- wherein the composition is formed by first melting and mixing the thermoplastic starch and the at least one polymer under conditions that reduce or maintain the water content of the composition at less than about 1% by weight while in a melted state, followed by cooling the melted composition with water in order to substantially solidify the composition and allowing it to reabsorb water so that the substantially solidified composition has a final water content in a range from about 1% to about 6% by weight.
1 more element
Dependencies are inferred from the claim text.