82results about How to "Remain biodegradable" patented technology

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.