Eastman Chemical Company

Other

Biotec Biologische Naturverpackungen & Co Kg

Kishan Chand Khemani

Richard L McConnell

William Alston Haile

James W Mercer, Jr

Leron R Dean

Simon K Hodson

Per Just Andersen

Harald Schmidt

Gary Darrel Boone

Carlos Humberto Juarez-Garcia

The invention relates to fibers, particularly binder fibers, made from polyesters and the polyesters themselves. The polyesters are the product of a reaction between a glycol component and a dicarboxylic acid component where the glycol component contains at least 50 mole % of a four carbon diol, such as 1,4-butanediol, or a six carbon diol, such as 1,6-hexanediol or a mixture of a four carbon and six carbon diol. Typically, the polyesters of the invention are semicrystalline and/or crystalline and have a specific melting point ranging from about 140 to about 185&deg; C. The polyesters of the invention may be formed into a variety of products, especially binder fibers for nonwoven fabrics, textile/industrial yarns and fabrics, composites and other molded articles.

Polyesters having a controlled melting point and fibers formed therefrom

Biodegradable polymer blends suitable for laminate coatings, wraps and other packaging materials manufactured from at least one &ldquo;hard&rdquo; biopolymer and at least one &ldquo;soft&rdquo; biopolymer. &ldquo;Hard&rdquo; biopolymers tend to be more brittle and rigid and typically have a glass transition temperature greater than about 10&deg; C. &ldquo;Soft&rdquo; biopolymers tend to be more flexible and pliable and typically have a glass transition temperature less than about 0&deg; C. While hard and soft polymers each possess certain intrinsic benefits, certain blends of hard and soft polymers have been discovered which possess synergistic properties superior to those of either hard or soft polymers by themselves. Biodegradable polymers include polyesters, polyesteramides and thermoplastically processable starch. The polymer blends may optionally include an inorganic filler. Films and sheets made from the polymer blends may be textured so as to increase the bulk hand feel. Wraps will typically be manufactured so as to have good &ldquo;dead-fold&rdquo; properties so as to remain in a wrapped position and not spring back to an &ldquo;unwrapped&rdquo; and planar form. Laminate films will typically have good water vapor barrier properties as measured by the their Water Vapor Permeability Coefficient (WVPC).

Biodegradable polymer films and sheets suitable for use as laminate coatings as well as wraps and other packaging materials

A branched random aliphatic-aromatic copolyesters suitable for foaming has increased melt viscosity and melt strength during extrusion and comprises repeating units of:

Biodegradable foamable co-polyester compositions

Disclosed is are high molecular weight copolyester compositions which possess high melt viscosity and melt strength which render them foamable with a wide range of foaming agents. The copolyesters consist essentially of (A) diacid residues comprising (i) from about 99.9 to about 95 mol % of residues of an aromatic dicarboxylic acid having 8 to 12 carbon atoms and (ii) from about 0.1 to about 5.0 mol % of residues of an aromatic dicarboxylic acid sulfonate monomer containing at least one divalent metal sulfonate group attached to an aromatic nucleus, and (B) diol residues comprising residues of at least one aliphatic or cycloaliphatic diol having 2 to 8 carbon atoms, the mol % being based on 100 mol % dicarboxylic acid residues and 100 mol % diol residues.

Foamable copolyesters prepared from divalent metal containing co-ionomers

Disclosed is a concentrate useful as an additive in a polyester composition comprising a polyolefin and a polyfunctional carboxylic acid or polyol branching agent. Also disclosed is a method of preparing a polyester composition having increased melt viscosity and melt strength, and improved impact strength which comprises the steps of A) melt compounding a polyolefin and a polyfunctional carboxylic acid or polyol branching agent, B) dry blending the melt compounded mixture formed in A) with a polyester, and C) molding or extruding the dry blended mixture formed into B) to form an article.

Concentrates for improving polyester compositions and method of making

This invention relates to a process for preparing foamable branched polyester compositions having increased melt viscosity and melt strength, and a reduced level of unreacted monomeric branching agent. The process involves melt blending (A) a composition containing a polyolefin and branching agent, (B) a nucleating agent either in powder form or (B') in the form of a composition containing a polyolefin and nucleating agent, and a polyester.

Foamable polyester compositions having a low level of unreacted

Disclosed is a concentrate useful as an additive in a polyester composition comprising a polyolefin and a polyfunctional carboxylic acid or polyol branching agent. Also disclosed is a method of preparing a polyester composition having increased melt viscosity and melt strength, and improved impact strength which comprises the steps of

Disclosed are branched polyester compositions having an I.V. of at least about 0.7 dl/g and a melt viscosity sufficiently high to permit foaming during extrusion or molding operations. These branched polyesters are readily foamable with a wide range of foaming agents to provide low density shaped articles, films, and sheets. The branched polyesters comprise about 80 to about 99.9 wt % of a polyester and about 0.1 to about 20 wt % of an ethylene copolymer containing repeat units of ethylene and of a monomer selected from the group comprising acrylic acid, methacrylic acid, alkyl acrylate, alkyl methacrylate and vinyl alcohol. The polyester comprises repeat units from about 75 to 100 mol % of a dibasic acid having from about 6 to about 40 carbon atoms and 0 to about 25 mol % of a modifying dibasic acid and repeat units from about 75 to 100 mol % of a glycol having from about 2 to about 10 carbon atoms, 0 to about 25 mol % of a modifying glycol and 0 to about 25 mol % of a modifying compound selected from the group comprising amino alcohols, diamines and lactams.

Growing community of inventors

Johnson City, TN, United States of America

Kishan Chand Khemani