82results about How to "Remain biodegradable" patented technology

A metallized laminate film exhibiting improved moisture barrier property as well as maintaining a high bio-polymer content and degradability property is disclosed. The laminate film includes a first core layer of polylactic acid polymer and a second skin layer comprising a polyolefin metal receiving layer. The metal receiving layer or the core layer, or both, may be blended with an amount of polar-modified tie-resin to improve bonding. Alternatively, a discrete tie-resin layer may be interposed between the polyolefin metal receiving layer and the crystalline polylactic acid polymer core layer. The polyolefin metal receiving layer may be discharge-treated on the side opposite the core layer and metallized.

The invention discloses a hyperbranched polyphosphate amide ester and a preparation method of flame-retardant biodegradable polyester thereof. The hyperbranched polyphosphate amide ester is prepared in the following steps: firstly reacting such A3 monomers as phosphorus oxychloride with such BB' monomers as methanolamine, ethanolamine and propanolamine under the protection of nitrogen, and then, adding a catalyst and an acid binding agent to perform a polycondensation reaction to generate the hyperbranched polyphosphate amide ester through one-pot method. The molecular structure of the prepared hyperbranched polyphosphate amide ester simultaneously contains a phosphate bond and a phosphamide bond, and the prepared hyperbranched polyphosphate amide ester is biodegradable, so that when 2wt% of the synthesized hyperbranched polyphosphate amide ester is added in biodegradable polyester, the oxygen index reaches 30-35%, and UL-94 passes V-0 level. The prepared flame-retardant biodegradable polyester prepared by the invention keeps the biodegradability of the whole system, and the fire-retardant biodegradable polyester has better nucleation property. The flame-retardant biodegradable polyester can be used as fiber, engineering film and injection shaped piece.

The invention provides a PBAT-based biodegradable composite material with high vapor barrier property. The composite material comprises the following components: PBAT, organic modification material, inorganic modification material, an initiator, a compatilizer and a catalyst. Compared with the prior art, the PBAT-based biodegradable composite material has the following beneficial effects: the compatibility and dispersity of the inorganic material in PBAT can be greatly improved by bridging PBAT with the inorganic material; the bridging action, generated due to combination of the compatilizer and the initiator, of the inorganic material is partially directionally distributed by layers in a blending system, the pass route of water molecules can be prolonged, and the motion time of the water molecules in the material can be prolonged, so that the water retention property of the material can be remarkably improved, the water vapor permeability of the composite material 10mum thin film material is reduced to 320g / m<2>.24h from 280g / m<2>.24h of the original-specification thin film, which is obviously superior to the similar materials.

The present invention discloses cross-linked polymethacrylic ethylene carbonic acid ester polymer electrolyte membrane and the preparation method. The polymer electrolyte membrane consists of cross-linked polymethacrylic ethylene carbonic acid ester polymer and electrolyte solution including conductive lithium salt and non-protonic solvent. The preparation method adopts carbon dioxide, epoxy dimethylmethane and unsaturated acid anhydride which are synthesized into polymethacrylic ethylene carbonic acid ester trivalent copolymer with special functional group under the role of catalyst dyadic carboxylic acid zinc. Then the trivalent copolymer is under the cross-linking reaction so as to get the dry polymethacrylic ethylene carbonic acid ester polymer membrane. Afterwards, the dry membrane is immerged into the liquid electrolyte solution for activation, thus obtaining the cross-linked polymethacrylic ethylene carbonic acid ester polymer electrolyte membrane. The polymer electrolyte membrane prepared by the present invention has the advantages of high mechanical performance, good thermal performance and high ion electric conduction. The present invention with low cost and simple process is applicable to the industrialized production.