49results about How to "High biobased content" patented technology

The invention discloses a bio-type thermoplastic polyurethane elastomer and a preparation method thereof. The bio-type thermoplastic polyurethane elastomer has high bio-based content and excellent comprehensive performance. The polyol number average molecular weight is 800-6000g / mol, and the polyol contains 50-100wt% bio-based polyester polyol; b) 0-25wt% chain extender component, and the chain extender contains 50-100wt% Bio-based chain extender; c) 5-45wt% diisocyanate component, said diisocyanate containing 10-60wt% bio-based diisocyanate; d) 0.001-0.1wt% catalyst component, said catalyst containing 50-100wt% Non-tin environment-friendly catalyst. The total bio-based content of components a) to c) is greater than or equal to 50 wt%. The thermoplastic polyurethane elastomer can be prepared by one-step method, batch method or prepolymer method.

The invention discloses a vegetable oil based polyurethane emulsion containing a vegetable based carboxylic acid type hydrophilic monomer, and its preparation method. The emulsion is prepared through using the following substances, by weight, 27.59-38.06 parts of diisocyanate, 23.42-32.34 parts of castor oil, 0.1-0.2 parts of an organic tin catalyst, 6.68-10.87 parts of a salt forming reagent, 22.95-37.42 parts of the vegetable oil based carboxylic acid type hydrophilic monomer, and 160.0-216.70 parts of deionized water. The dry film of the vegetable oil based highly-water-resistant polyurethane emulsion has the characteristics of no whitening and no cracking after the immersion in water for 30 days, and has a water absorption rate of 5.6-12.1% after the immersion for 192h; and the highly-water-resistant polyurethane emulsion has the advantages of low cost, renewability, no environmental pollution, biodegradable property and the like because main used raw materials are renewable resources, can be used for coatings and adhesives as a resin, and can be especially used in occasions having a high water resistance requirement.

The invention discloses completely biodegradable resin made of non-staple grain plant modified starch and its preparation method. The method comprises the steps of: first putting non-staple grain plant starch into a reaction vessel, adding water to prepare it into starch milk, and heating it to a proper temperature, conducting stirring and washing, then adding chemicals into a water solution for modification grafting treatment, and then separating water and starch through centrifugation, and conveying the separated modified starch to an airflow drying system for dewatering and drying, then taking 100 parts of dried modified starch, adding 5-50 parts of a compatilizer, 2-15 parts of an anti-block agent, 0-100 parts of polylactic acid, and 150-250 parts of a completely biodegradable copolymer of dibasic acid and dibasic alcohol, and mixing them uniformly, carrying out extrusion granulating or tabletting under an appropriate temperature and pressure, thus obtaining a resin material or sheet special for complete biodegradation. The resin of the invention has both the usage function similar to ordinary plastic products and a complete biodegradability. And after being used and abandoned, the resin can be degraded into carbon dioxide and water that can be consumed by the environment.