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Polyester Materials

Patent Abstracts

from 5/4/2012

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Patent Abstracts

13. 8,445,604 
Thermoformed article made from polybutylene succinate (PBS) and modified polybutylene succinate (MPBS) 

In light of depleting landfill space and inadequate disposal sites, there is a need for polymers that are water-responsive.  Currently, although polymers, such as polyethylene, polypropylene, polyethylene terephthalate, nylon, polystyrene, polyvinyl chloride and polyvinylidene chloride, are popular for their superior extrusion and film and fiber making properties, these polymers are not water-responsive. Furthermore, these polymers are generally non-compostable, which is undesirable from an environmental perspective.

Although water sensitive, degradable materials have been used in film and fiber-containing articles, many problems have been encountered with their use.  Often the polymers and articles made from these polymers are not completely water-responsive or compostable.  Furthermore, some water-responsive polymers may also be unduly sensitive to water, either limiting the use of the polymer or requiring some type of surface treatment to the polymer, often rendering the polymer non-water-responsive.  Other polymers are undesirable because they have inadequate heat resistance for wide spread use.

Wei  et al of the International Paper Company developed thermoformable resins consisting of a biodegradable, extrudable polybutylene succinate (PBS) a) a Ts value of up to about 160 C, (b) a heat distortion index of up to 150 C; and (c) optionally, a Tm from to 160 C. Thermoformed article such as a food or beverage cup, lid, cutlery item, foodservice item, molded tray, food storage container, etc provide the ability to resist deformation during higher temperature conditions that may occur during storage and distribution. [Biodegrable thermoforming resins, US Patent 8,445,604 (5/21/2013)]

12. 8,242,209 
Toughened poly(trimethylene terephthalate) composition with reduced melt viscosity
Talkowski, Hausmann and  Walsh  of DuPont, Delaware, developed mixture of a poly(trimethylene terephthalate) polymer, a nucleating agent, and an ethylene copolymer. Also disclosed in a method for reducing the melt viscosity of nucleated poly(trimethylene terephthalate) polymer composition. (RDC 8/30/2012)

11. 8,211,967 
Composite repair resins containing minimal hazardous air pollutants and volatile organic compound
La Scala, Sands and Palmese of Drexel University, Philadelphia, developed a material for repairing composites with either reduced or zero volatile organic compound (VOC) and zero hazardous air pollutant (HAP) emissions. The non-volatile reactive diluents of the composite resin, fatty acid monomers, enhance the stability, shelf-life, flexibility and strength of the composite resin. The resins incorporating fatty acid monomers may be used to repair military equipment or for any commercial repair purposes (RDC 7/10/2012)

10. 8,211,959 
Biodegradable copolymer hydrogels
Shen of the Industrial Technology Research Institute, Taiwan,  developed a biodegradable copolymer hydrogel consisting a two-phase block copolymer represented by A-B--BOX--B-A or B-A-B--BOX--B-A-B, wherein A is a hydrophilic block such as a hydrophilic polyethylene glycol polymer, B a hydrophobic block such as a hydrophobic polyester polymer, and BOX a bifunctional group monomer of 2,2'-Bis(2-oxazoline). The biodegradable copolymer hydrogel is prepared by cross-linking the di-block A-B or the tri-block B-A-B via ring-opening polymerization in presence of a bifunctional group monomer (2,2'-Bis(2-oxazoline)). (RDC 7/10/2012)

9. 8,211,608 
Method for production of resin emulsion
Mizuhata, Kamiyoshi and  Sata of Kao Corporation, Japan, developed a resin emulsion which has a good emulsification performance even when produced by using a crosslinked polyester resin as a binder resin, and also is capable of producing a toner having an excellent storage property therefrom; and a process for producing the resin emulsion.  The process for producing a resin emulsion according to the present invention, includes the steps of: (a) mixing a resin containing a polyester having at least one constitutional unit selected from the group consisting of a constitutional unit derived from a trivalent or higher-valent alcohol component and a constitutional unit derived from a trivalent or higher-valent carboxylic acid component, an anionic surfactant, a nonionic surfactant and an aqueous medium with each other at a temperature not lower than a softening temperature (Ts) of the resin as measured by a flow tester method, the nonionic surfactant and the aqueous medium being used in amounts of from 0.1 to 1.0 part by weight and from 10 to 50 parts by weight, respectively, on the basis of 100 parts by weight of the resin; and (b) neutralizing a mixture obtained in the step (a) with a basic compound in an aqueous medium at a temperature not higher than a softening point (T1/2) of the resin as measured by a flow tester method. (RDC 7/9/2012)

8. 8,193,264 
Thermoplastic resin composition and molded article thereof
Kumazawa et al of Toray Industries, Japan, developed a thermoplastic material which is excellent in flowability and mechanical properties with low warping, excellent laser transmittance and excellent laser weldability.  The resin is obtained by mixing (B) 0.1 to 4 parts by weight of a polyfunctional compound having three or more functional groups, in which at least one of the terminal structures having the functional groups is a structure containing alkylene oxide units, with (A) 100 parts by weight of a thermoplastic resin, and further provides a molded particle thereof. It is preferred that the (A) thermoplastic resin is one or more selected from a polyester resin and polycarbonate resin (RDC 6/27/2012)

7. 8,192,759 
Matrix made of polyester polymers entangled with hyaluronic polymers useful for supporting tissue repair
Seyedin and Spiro of ISTO Technologies, Missouri, developed  matrix compositions to support the repair of tissue defects such as an osteochondral injury.  A matrix consists of a polyester polymer entangled with a polysaccharide polymer. In certain configurations, a matrix can be a polyester cross-linked with a polysaccharide, which can be an oxidized polysaccharide. In some configurations, a matrix can further comprise one or more additional components, such as a growth factor. (RDC 6/19/2012)

6. 8,188,172 
Polyester compositions, method of manufacture, and uses thereof
Elango et al of Sabic Innovative Plastics, Netherlands, developed a polyester material consisting of: (a) 20 to 80 wt % polyester; (b) 5 to 35 wt % of a flame retardant phosphinate of the formula (I) [(R1)(R2)(PO)--O]-mMm+ (I), a flame retardant diphosphinate of the formula (II) [(O--POR1)(R3)(POR2--O)]2-nMx.m+ (II), and/or a flame retardant polymer derived from the flame retardant phosphinate of the formula (I) or the flame retardant diphosphinate of the formula (II), wherein R1 and R2 are identical or different and are H, C1-C6-alkyl, linear or branched, or C6-C10-aryl; R3 is C1-C10-alkylene, linear or branched, C6-C10-arylene, -alkylarylene or -arylalkylene; M is an alkaline earth metal, alkali metal, Al, Ti, Zn, Fe, or boron; m is 1, 2, 3 or 4; n is 1, 2, or 3; and x is 1 or 2; (c) from 1 to 25 wt % of a melamine polyphosphate, melamine cyanurate, melamine pyrophosphate, and/or melamine phosphate; (d) from more than 0 to 25 wt % of a polyetherimide; and (e) optionally, an additive. (RDC 6/7/2012)

5. 8,178,647 
Copolyester ether elastomer compositions and methods of making copolyester ether elastomer compositions
Hawkins et al of Eastman Chemical Company, Tennessee, Copolyester ether elastomer compositions and methods for preparing copolyester ether elastomer compositions. Such compositions can comprise a copolyester ether, a thermoplastic elastomer, and a compatibilizer resin. Improved properties of such compositions can be useful in making various articles of manufacture, such as, for example, laboratory and medical application tubing. (RDC 5/29/2012)

4. 8,178,628 
Aliphatic polyester resin composition and method for production thereof|

Tanaka, Kiuchi and Iji; of the NEC Corporation, Japan, developed an an aliphatic polyester material having excellent hydrolysis resistance.  A reactive monomer (B) (e.g. a monocarbodiimide compound) and a reactive polymer (C) (e.g. a polycarbodiimide compound) is added to the aliphatic polyester.  (RDC 5/29/2012)

3. 8,178,208 
Polyester compositions, methods of manufacture, and uses thereof
Konduri  of Sabic Innovative Plastics, Netherlands, developed a polyester consisting of 44 to 80 wt% thermoplastic poly(butylene terephthalate); 20 to 50 wt% thermoplastic poly(ethylene terephthalate) having an intrinsic viscosity of 0.5 to 0.8 deciliters per gram,  5 to less than 20 wt% talc filler having an average largest dimension of less than 0.9 micrometers, a median particle size of less than 0.9 micrometers, or both; and 0.1 to 0.5 wt% mold release agent. The compositions are useful in the manufacture of lighting articles, which can be directly metallized without the inclusion of a base coat.  (RDC 5/24/2012)

2. 8,138,244 
Reinforced polyester compositions, method of manufacture, and articles thereof
Ding and Kim of Sabic Innovative Plastics, Netherlands, developed a polyester materials consisting of  20 to 90 wt% of a modified poly(butylene terephthalate) copolymer that is derived from a poly(ethylene terephthalate); 5 to 35 wt% of a flame retardant phosphinate and/or a flame retardant diphosphinate; 1 to 25 wt% of a melamine polyphosphate, melamine cyanurate, melamine pyrophosphate, and/or melamine phosphate; greater than zero to 50 wt% of a glass fiber having a non-circular cross-section; and 0 to 5 wt% of an additive. (RDC 5/16/2012)

1. 8,133,967 
Restaurant smallware comprising polyester compositions formed from 2,2,4,4-tetramethyl-1,3-cyclobutanediol and 1,4-cyclohexanedimethanol

Pecorini et al of Eastman Chemical Company, Tennessee, developed polyester materials for restaurant smallware, containing terephthalic acid residues and optionally, aromatic dicarboxylic acid residues or aliphatic dicarboxylic acid residues and glycol component, comprising 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues and cyclohexanedimethanol residues. The polyester composition has the inherent viscosity from 0.55 to 0.0.68 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.5 g/100 ml at C., glass transition temperature Tg of C. to C., notched Izod impact strength of at least 7.5 ft-lb/inch at C. according to ASTM D256 with a 10-mil notch in a 1/8-inch thick bar, melt viscosity is less than 10,000 poise as measured at 1 radian/second on a rotary melt rheometer at C. and does not contain polycarbonate. (RDC 5/4/2012)


Roger D. Corneliussen

Maro Polymer Links
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Copyright 2012 by Roger D. Corneliussen.
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** Date of latest addition; date of first entry is 5/4/2012.