Maro Publications

Polylactic Acid Materials

Patent Abstracts

from 8/10/2012

Maro Topics


Patents with Abstracts

8. 8,378,027 
Manufacturing method of polylactic acid composite composition 

Hong and Han of Hyundai, South Korea, developed a polylactic acid material by melting and blending 60-80 wt % of a poly(L-lactic acid) resin, 15-30 wt % of a poly(D-lactic acid) resin and 5-10 wt % of a poly(ethylene-alkyl acrylate-glycidyl methacrylate) resin at 190-195 C.; and injecting the resulting melt in a mold whose surface temperature is 100-110 C.  This matgerials shows superior heat resistance, impact strength and tensile strength by blending the PLLA resin, the PDLA resin and the poly(ethylene-alkyl acrylate-glycidyl methacrylate) resin at specific proportion, under controlled processing and molding conditions. The polylactic acid composite composition prepared according to the present invention can replace the petroleum-based general-use polymer resins and engineering plastic materials that have been used for automobile parts with the environment-friendly biomass-based biomaterials, and may be usefully utilized for automobile interior and exterior parts. (RDC 2/27/2013)

7. 8,304,048 
Polylactic acid-based resin composition, polylactic acid-based film, molded product using the film, elongated film, heat-shrinkable label, and container having the label thereon
Iked and Taniguchi of Mitsubishi Plastics, Inc., Japan, developed a polylactic acid-based resin consisting of 50-90 mass % of a polylactic acid-based resin (A); and 10-50 mass % of a polyolefin-based resin (B).  The heat of crystallization of the polyolefin-based resin (B) being 40 J/g or less as measured by using differential scanning calorimeter as measured at a thermal process comprising the steps of: heating up to C. at a heating rate of C./min; keeping the temperature at C. for 5 minutes; and cooling down to the room temperature at a cooling rate of C./min. The invention also provides: The composition may be applied, for example, to produce a polylactic acid-based film, a molded product using the film, an elongated film, a heat-shrinkable label, and a container having the heat-shrinkable label. (RDC 12/22/2012)

6. 8,288,463 
Polylactic acid based resin, polylactic acid based resin composition, molded body of polylactic acid based resin or polylactic acid based resin composition, and method for producing polylactic acid based resin

Urakami, Higuchi and Isokawa of Mitsui Chemicals, Inc., Japan, developed a polylactic acid materials consisting of blends of polylactic acid polymers, ethylene lactic acid copolymers, linear polyethylene polymers and nucleating agents.  (RDC 11/1/2012)

5. 8,258,221 
Polylactic acid-based resin composition and molded article of polylactic acid-based resin
Yao, Ikuno and Okoshi Assignee: Fuji Xerox Co., Ltd., Japan, developed a polylactic acid materials consisting of (A) a polylactic acid-based resin; (B) a flame retardant compound,  (C) an ammonium compound of organic acid and a hydrolysis inhibitor such as carbodiimide and oxazoline compounds. (RDC 9/19/2012)

4. 8,242,197 
Blend of aromatic polycarbonate and polylactic acid, the method for preparing the same and the use thereof
Warth et al of Bayer, Germany, developed blends of aromatic polycarbonate and polylactic acid by adding a transesterification catalyst to improve compatibility.  The blend of aromatic polycarbonate and polylactic acid is provided with the good mechanical properties, thermal processibility and flame retardance properties, and can be widely applied to mechanical product or parts, electronic equipments and/or parts, construction material and/or commodities (RDC 8/29/2012)

3. 8,232,354 
Method for producing a polylactic acid resin composition
Kishimoto and Takenaka of KAO Corporation, Japan, developed a toughened polylactic acid by mixing uncrosslinked polylactic acid with crosslinked polylactoic acid resins.  The crosslinked resin is crosslinked with polycarbodiimide.  (RDC 8/11/2012)

2. 8,232,343 
Environmentally-friendly polylactic acid resin composition
Chung et al of  Cheil Industries Inc., South Korea, developed an environmentally-friendly polylactic acid resin composition includes (A) a mixed resin including (a1) a polylactic acid (PLA) resin and (a2) a polycarbonate resin, and (B) a compatibilizer capable of forming a stereo-complex with the polylactic acid resin. According to the present invention, the polylactic acid resin composition is environmentally-friendly and has excellent appearance and improved welding impact strength, as well as improved mechanical strength and heat resistance. (RDC 8/11/2012)

1. 8,231,954 
Thermoformed articles made from reactive extrusion products of biobased materials
Li, Tedford and Thoman of International Paper, Tennessee, developed a thermoformable composite by crosslinking polyhydroxyalkanoate (PHA) and poly lactic acid (PLA) twith other resins having: (a) a Ts value of up to about C.; and (b) a heat distortion index of up to about 160 C. The thermoformable composite is used to make a food or beverage cup, lid, cutlery item, foodservice item, molded tray, or food storage container. The thermoformable composite consists of 5 to 95 wt% PLA,  5 to 95 wt% PHA and 0.0 to 60 wt% additives.  The PLA and PHAs are crosslinked together by intermolecular means to enhance performance and processability. (RDC 8/10/2012)


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(RDC 6/5/2012)


Roger D. Corneliussen

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Copyright 2012 by Roger D. Corneliussen.
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** Date of latest addition; date of first entry is 8/10/2012.