Voici un billet rendant compte de quelques brevets récents dans les bio-matériaux.
- Polyester polymer, its moldings, and production method of the polyester polymer
- Structured baroplastic materials
- Biodegradable polymer systems
- Process for preparing a stabilized polyester
- Recovery and purification of polyhydroxyalkanoates
- Biomass based Michael addition compositions
- Polyester compound and resist material using the same
- Biofunctional fibers
- Method for preparing poly (lactic acid)-based resin and its co-polymers
- Process for producing aliphatic polyester
- Transparent blends of polypropylene carbonate and polylactide
Polyester polymer, its moldings, and production method of the polyester polymer
United States Patent 7538176
Abstract:
The aim of the invention is to stably provide a polyester polymer which has excellent transparency, mechanical and electric characteristics, and extremely low optical anisotropy and excellent moldability and size stability for engineering plastics, particularly suitable for optical materials. The above-mentioned problem can be achieved by a polyester polymer, obtainable from a dicarboxylic acid compound and a dihydroxy compound,
o wherein the dicarboxylic acid compound comprises an alicyclic dicarboxylic acid and/or its ester-forming derivative,
o the dihydroxy compound comprises a compound of the general formula (1):
o a content of a diethylene glycol in the polyester polymer is 6 mol % or lower.
Inventors:
Fuji, Michiaki (Kyoto, JP)
Ito, Yoshimi (Hofu, JP)
Application Number:
10/547350
Publication Date:
05/26/2009
Filing Date:
02/27/2004
*****************
Structured baroplastic materials
United States Patent 7538157
Abstract:
The present invention provides a series of baroplastic materials, and systems and methods of making and using such baroplastic materials. In one aspect of the invention, polymeric particles are provided that can be used to produce baroplastic materials under certain pressures and/or below certain temperatures. In one set of embodiments, the polymeric particles include an inner “core” region and an outer “shell” region. In some cases, more than one “shell” region may be present. In another arrangement the particles can include materials, or domains, in nanoscale proximity with each other. Non-particulate materials can also be processed in accordance with the invention. In another aspect of the invention, the invention provides for polymeric particles that can be processed and/or recycled multiple times, without causing significant degradation or alteration in the physical and/or chemical properties of the polymer. In yet another aspect, the invention provides compositions able to form baroplastic materials upon the application of certain pressures, where the composition includes at least two chemically distinct materials in nanoscale proximity to each other. In still another aspect of the invention, a method of mixing two polymers upon the application of pressure is provided.
Inventors:
Mayes, Anne M. (Mustang, OK, US)
Ryu, Sang-woog (Taegu, KR)
Acar, Metin H. (Istanbul, TR)
Gonzalez, Juan A. (Cambridge, MA, US)
Application Number:
11/172371
Publication Date:
05/26/2009
Filing Date:
06/29/2005
*****************
Biodegradable polymer systems
United States Patent 7524891
Abstract:
The rate of degradation of polymers and polymer blends containing (poly) lactic acid can be increased and controlled by the inclusion of up to 10% (typically less than 1%) by weight of specific additives such as lauric acid or a derivative thereof such as the anhydride.
Inventors:
Rose, John (York, GB)
Hardwick, Steven (York, GB)
Application Number:
10/482371
Publication Date:
04/28/2009
Filing Date:
07/03/2002
****************
Process for preparing a stabilized polyester
United States Patent 7514526
Abstract:
The present invention discloses a process for the preparation of a stabilized polyester that is low in the generation of aldehydes which comprises reacting one or more diacids with one or more diols in an esterification process, and/or one or more diesters with one or more diols in a transesterification process in the presence of an effective amount of a stabilizer selected from the group consisting of (a) a polyhydric alcohol which is for example poly(ethylene-co-vinyl alcohol), poly(styrene-co-allyl alcohol), maltitol, isomalt, sorbitol, xylitol, sucrose, mucic acid dibutylester, mucic acid di(phenyl-1-ethyl)ester, pentaerythritol or dipentaerythritol; (b) a compound of the formula II which is for example di-iso-octyl-phosphinic acid; (c) a sterically hindered amine which is for example Tinuvin 123 or Tinuvin 622; (d) a polyacrylamide, an anionic acrylic polymer or a cationic acrylamide copolymer; or (e) a hydroxylamine and/or a nitrone. Such polyesters, for example PET, when extrusion compounded exhibit a lower residual acetaldehyde content than does PET alone when similarly treated. The invention pertains to any polyester used in the manufacture of bottles or containers which in turn are used to store consumer materials, especially food, pharmaceuticals, beverages and most especially water.
Inventors:
Simon, Dirk (Mutterstadt, DE)
Lazzari, Dario (Bologna, IT)
Andrews, Stephen Mark (New Fairfield, CT, US)
Herbst, Heinz (Lörrach, DE)
Application Number:
11/348664
Publication Date:
04/07/2009
Filing Date:
02/07/2006
****************
Recovery and purification of polyhydroxyalkanoates
United States Patent 7514525
Abstract:
The present invention relates to a method to recover, purify and isolate polyhydroxyalkanoate (PHA) biopolymers from PHA-containing cell mass, which includes: (a) solubilizing the non-PHA cell mass in an acidic solution, leaving a suspension of partially crystallized PHA granules; (b) adjusting the pH of the suspension to 7-11 and separating the PHA solids from the dissolved non-PHA cellular mass; (c) re-suspending the PHA solids in a bleaching solution for decolorization; and (d) drying the resulting PHA solids. About 95% or greater of original PHA in cell mass is recovered, and the purity of PHA solids is about 97% or above. The weight average molecular mass of the purified biopolyesters is about 500 kDa or greater.
Inventors:
Yu, Jian (Honolulu, HI, US)
Application Number:
11/684110
Publication Date:
04/07/2009
Filing Date:
03/09/2007
****************
Biomass based Michael addition compositions
United States Patent 7514528
Abstract:
Functional mixtures and polymer compositions are provided, each comprising at least one multi-functional Michael acceptor, at least one multi-functional Michael donor, in which at least 20% of either the donor or acceptor or a combination of the donor and acceptor is derived from bio-based materials and at least one catalyst.
Inventors:
Kauffman, Thomas Frederick (Harleysville, PA, US)
Whitman, David William (Harleysville, PA, US)
Zajaczkowski, Michael John (York, PA, US)
Vietti, David Elmer (Cary, IL, US)
Application Number:
11/232649
Publication Date:
04/07/2009
Filing Date:
09/22/2005
*****************
Polyester compound and resist material using the same
United States Patent 7517635
Abstract:
There is provided a novel polyester compound having in its main polymer chain an aliphatic cyclic structure with carboxylic acids or carboxylic acid ester groups as represented by the chemical formula (1), a resist material containing the polyester compound and a patterning method using the resist material.
Inventors:
Miyazawa, Satoru (Kawagoe, JP)
Kobayashi, Satoru (Kawagoe, JP)
Maeda, Kazuhiko (Chiyoda-ku, JP)
Application Number:
11/509638
Publication Date:
04/14/2009
Filing Date:
08/25/2006
********************
Biofunctional fibers
United States Patent 7524513
Abstract:
The present invention is directed to surface functionalization of polymeric fibers. Surface biofunctionalization is achieved by covalent conjugation of biofunctional igands and/or cell growth factors that are crucial for cell attachment, proliferation and functions. Biofunctional fibers could be fabricated into three-dimensional scaffolds. Polymer fibers described here comprise of biocompatible polymers that are either biodegradable ornon-biodegradable. This patent also describes a series of new biodegradable polyphosphoramidates for the processing of biodegradable fibers. Scaffolds made of non-biodegradable functional fibers could be used for in vitro cell culture (for example, ex vivo cell expansion), while biodegradable functional fibers could be fabricated into tissue engineering scaffolds.
Inventors:
Hai-quan, Mao (Block 60 West Coast Crescent, #04-01 West Bay Condominium, 128040 Singapore, SG)
Kuan, Chee Mun (c/o Johns Hopkins Pte Ltd, 41 Science Park Road, #03-18 The Gemini, Singapore Science Park II, 117610 Singapore, SG)
Leong, Kam Weng (10242 Breconshire Rd., Ellicott City, MD, US)
Application Number:
10/481006
Publication Date:
04/28/2009
Filing Date:
06/14/2002
***************
Method for preparing poly (lactic acid)-based resin and its co-polymers
United States Patent 7538181
Abstract:
A method for preparing poly (lactic acid)-based resin or its co-polymers with high molecular weight, the method comprising a condensation process using a thiaole cation condensing agent, as well as the polymers obtained therefrom.
Inventors:
Ren, Jie (Shanghai, CN)
Wang, Qinfeng (Shanghai, CN)
Zhang, Naiwen (Shanghai, CN)
Application Number:
11/335575
Publication Date:
05/26/2009
Filing Date:
01/20/2006
******************
Process for producing aliphatic polyester
United States Patent 7538179
Abstract:
Ring-opening polymerization of a cyclic ester is performed by using an alcohol and water positively as initiators or/and molecular weight-adjusting agents to control the initial properties and properties with time of the resultant aliphatic polyester. More specifically, an aliphatic polyester is produced by ring-opening polymerization of a cyclic ester containing water and an alcohol based on a total proton concentration and a ratio between a mol concentration of carboxyl (carboxylic acid)-source compounds including water and a mol concentration of alkoxycarbonyl (ester)-source compounds, as polymerization-controlling indexes.
Inventors:
Sato, Hiroyuki (Fukushima-Ken, JP)
Akutsu, Fumio (Fukushima-Ken, JP)
Kobayashi, Fuminori (Fukushima-Ken, JP)
Okada, Yasushi (Fukushima-Ken, JP)
Application Number:
10/577379
Publication Date:
05/26/2009
Filing Date:
11/04/2004
*********
Transparent blends of polypropylene carbonate and polylactide
Transparent blends comprise (a) 1-99 parts of PP carbonate having a Mn of 30,000-5,000,000, (b) 99-1 parts of PLA, (c) 0.1-25 parts of an additional component that is known to function as an antioxidant, a flame retardant, a filler, a metal complexing agent, a plasticizer or processing aid, a pigments, a dye, a brightener or an antistatic agent.
Source : Luinstra, Gerrit. (BASF Aktiengesellschaft, Germany). PCT Int. Appl. (2007), WO 2007125039 A1 20071108
