C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 69/44 (2006.01) C09J 177/12 (2006.01)
Patent
CA 2165354
This invention relates to biologically degradable, partially crystalline block copolyester-polyamides comprising at least two chemically differently structured segments of which at least one is a polyester (PES) block or a copolyester (coPES) block, preferably with a number average molecular mass of 340 to 10,000 g/mole, and at least one is a polyamide ( PA) block or a copolyamide ( coPA) block, preferably with a number average molecular mass of 400 to 3,000 g/mole. In addition, copolyester-amide (coPEA) blocks can be employed, preferably with a number average molecular mass of 500 to 5,000 g/mole. The invention also relates to a polycondensation process for the manufacture of these partially crystalline block copolyester-polyamides. The block copolymers described are useful for the manufacture of fibers, foils, molded articles and hot melt- type adhesives. Molded components manufactured from the copolymers in accordance with the invention are biologically degradable and are capable of being composted.
Hoff Heinz
Ems-Inventa Ag
Ridout & Maybee Llp
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