Biodegradable polymer mixture

Patent metadata

Field	Value
Publication number	US-9206311-B2
Application number	US-201414564895-A
Country	US
Kind code	B2
Filing date	Dec 9, 2014
Priority date	Sep 29, 2008
Publication date	Dec 8, 2015
Grant date	Dec 8, 2015

Abstract

The present invention relates to biodegradable polymer mixtures comprising
i) 40% to 95% by weight, based on the total weight of components i to ii, of at least one polyester based on aliphatic or aliphatic and aromatic dicarboxylic acids and aliphatic dihydroxy compounds; ii) 5% to 60% by weight, based on the total weight of said components i to ii, of polyalkylene carbonate, particularly polypropylene carbonate; iii) 0% to 60% by weight, based on the total weight of said components i to iii, of at least one biodegradable homo- or copolyester selected from the group consisting of polylactic acid, polycaprolactone and polyhydroxyalkanoate, and/or of an inorganic or organic filler; iv) 0% to 10% by weight, based on the total weight of said components i to ii, of an epoxy-containing copolymer based on styrene, acrylic ester and/or methacrylic ester, and v) 0% to 15% by weight of an additive selected from the group consisting of lubricant, antiblocking agent, antistat, UV absorber, UV stabilizer, thermal stabilizer, dye, pigment, colorant, plasticizer, fertilizer and active crop protection ingredient.

The present invention further relates to processes for producing biodegradable polymer mixtures, to the use of biodegradable polymer mixtures in the production of moldings, films or fibers and also moldings, films or fibers comprising biodegradable polymer mixtures.

First claim

We claim:

1. A biodegradable polymer mixture comprising:
i) 40% to 95% by weight, based on the total weight of components i and ii, of at least one polyester based on aliphatic and aromatic dicarboxylic acids and aliphatic dihydroxy compounds;
ii) 5% to 60% by weight, based on the total weight of said components i and ii, of polypropylene carbonate, wherein the polypropylene carbonate chain comprises more than 85% carbonate linkages and less than 15% ether linkages;
iii) 0% t…

Assignees

• Basf Se

Inventors

• Steinke Tobias H
• Görtz Hans-Helmut
• Ahlers Jürgen
• Gruber Freddy
• Skupin Gabriel

Classifications

• C08L67/02 Primary

  Chemistry & Metallurgy · mapped topic

• C08L33/08

  Chemistry & Metallurgy · mapped topic

• C08L33/062

  Chemistry & Metallurgy · mapped topic

• C08L2666/02

  Chemistry & Metallurgy · mapped topic

• C08L2205/03

  Chemistry & Metallurgy · mapped topic