5. U.S. Patent 8,524,811 (September 3, 2013), “Algae-Blended Compositions for Thermoplastic Articles,” Bo Shi, and James H. Wang (Kimberly-Clark Worldwide, Inc., Neenah, Wisconsin, USA).
Polymers are used in a variety of disposable absorbent products and protective and healthcare fabrics. Many disposable absorbent products are becoming an ever-increasing concern throughout the world about long-term disposal. Shi and Wang developed a thermoplastic material for disposal containing biodegradable and renewable components. The renewable component is a mixture of 4 to 35 wt% algae material, 10 to 50 wt% plant polymers such as starch and proteins and 10 to 40 wt% plasticizer. This mixture can be added to 5 to 50 wt% nonrenewable synthetic resin and still be biodegradable. Applications include personal care products, agriculture films, containers, building materials, electrical apparatus, and automobile parts.
Method and aqueous adhesive composition for the production of panels made from vegetable matter
Graux and Mentink of Roquette Freres, France, developed an adhesive including vegetable starch the amylose content of which is between 30 and 60%. This adhesive is used forming lignocelluloses panel by hot pressing. The emissions of formaldehyde vapor are minimized as low as possible during processing and later use. .
Compositions for preparing plant fiber composites and plant fiber composites prepared from the same
Liu, Taiwan, developed a plant fiber composite has, by weight based on the whole composition: a plant fiber raw material in an amount ranging from 60% to 80%; a starch auxiliary in an amount ranging from 10% to 30%; and a biological polymer additive in amount ranging from 10% to 20%, wherein the biological polymer additive includes a plant hormone, an enzyme, a vinegar and an ester of lactic acid. The plant fiber composite is derived from recycled material for extrusion and modeling, as a non-toxic and harmless raw material with high utilizing rate of recycled material and substitutes for plastic materials. The plant fiber composite is applied to food container, packing materials for electronic device and agricultural products, seedling trays, or substitutes for timber in the field of building, decoration and furniture. (RDC 3/19/2013)
Injection molding material containing starch and plant protein
Wang et al of Kimberly-Clark Worldwide, Inc., Wisconsin, developed an injection molding material that includes a renewable resin containing a combination of renewable polymers (e.g., starch and plant protein) and a plasticizer. Although such compounds are normally difficult to process into thermoplastics, the present inventors have discovered that injection molding materials may nevertheless be formed by melt blending the renewable resin with a synthetic resin (e.g., polyolefin) while selectively controlling the nature of the resins and their relative concentrations. In this manner, a morphology may be achieved in which the renewable resin is present as a discontinuous phase that is dispersed within a continuous phase of the synthetic resin (e.g., "island-in-the-sea" morphology). The discontinuous and continuous phases may each constitute from about 30 vol. % to about 70 vol. %, and in some embodiments, from about 40 vol. % to about 60 vol. %. With such a morphology, the continuity of the synthetic resin can minimize the aggregate properties of the renewable resin such that the molding material possesses melt properties similar to that of the synthetic resin. Further, this morphology may also minimize the need to use different molding tools as the shrinkage properties of the overall composition may be substantially similar to that of the synthetic resin. (RDC 10/16/2012)
Block copolymer derived from renewable materials and method for making such block copolymer
Malet, Le and Jouanneau of Arkema France, France, developed a block copolymer consisting of 1 to 99% of at least one polyether flexible block from tetrahydrofuran containing 14C, and from 1 to 99% of at least one rigid block sucha as polyamide, polyurethane and polyester blocks. (RDC 8/10/2012)
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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 8/10/2012.