54results about How to "High biomass content" patented technology

The invention provides a heat-resistant polyactic acid composition and a preparation method thereof, and belongs to the technical field of high polymer materials. The composition consists of polylactic resin and a starch composition, and the weight ratio of the starch composition to the polylactic resin is (1: 99) to (50: 50). The starch composition contains a starch grafted copolymer and a nucleating agent; and the weight ratio of the starch grafted copolymer to the nucleating agent is 100: (1 to 100). Through a series of mixing of the raw materials, the polyactic acid composition is obtainedthrough melt blending. The heat-resistant polyactic acid composition is green and environmentally-friendly, low in cost and simple in technology, and the degradable polyactic acid composition with controllable performance is obtained.

The invention belongs to the technical field of modified starch, and discloses a PBAT / modified starch fully biodegradable film with high ductility and high barrier performance, a preparation method and application thereof. The preparation method of the present invention comprises the following steps: pre-mixing starch and plasticizer at a mass ratio of 6:4 to 8:2 to obtain a pre-mixture, then adding multi-component organic acid for mixing, extruding A to granulate, and obtaining acidified modified thermoplastic Starch; and PBAT through twin-screw blending and extrusion B to prepare PBAT / AMTPS blends, and obtain PBAT / modified starch fully biodegradable films by extrusion-blown film molding, which have good processing properties and good mechanical properties , the elongation at break is increased to 1000-1400%, and the gas barrier property is good, and the gas transmission coefficient is as low as 5.6×10 ‑9 cm 3 ·cm·cm ‑2 ·s ‑1 ·Pa ‑1 , can be used in food packaging, plastic film and garbage bags and other fields.

A polylactic polyester resin having a chemical structure represented by Formula (1), an acid value of 300 to 2,500 eq / 106 g, a number average molecular weight of 2,000 to 50,000, and a lactic acid content percentage of not less than 40 weight %,Z—(O—(CH2CH2O)p—(CO—Y—O)q—X)r  (1)wherein Z is an r-valent organic group, Y is —CH(CH3)—, or a mixture of —CH(CH3)— and C2-10 linear or branched alkylene group, and X is a residue of a polybasic acid having 2 or more carboxyl groups, or hydrogen; each of X, Y, and Z may be one kind or a mixture of a plurality of different kinds; and p, q, and r are 0 or a positive integer, p has an average value of not less than 0.5, q has an average value of not less than 5, and r has an average value of not less than 3 and not more than 15.An aqueous dispersion, an aqueous resin composition, an aqueous adhesive, an aqueous paint, aqueous ink, a laminate made of an aqueous adhesive or aqueous ink, a packaging material, a sustained-release biodegradable coating agent, and a sustained-release biodegradable coated body comprising the sustained-release biodegradable coating agent, which contain the polyester resin.

The invention discloses a modified bismaleimide resin and a preparation method thereof. Biomass-based 2,5 furandicarboxylic acid and thionyl chloride were acylated under the condition of N,N-dimethylformamide as a catalyst to obtain 2,5 furandicarboxylic acid chloride, which was combined with biomass-based clove Phenols were dissolved in dichloromethane, respectively, and esterified under the conditions of tertiary amines to obtain bis(4‑allyl‑2‑methoxyphenyl)furan‑2,5‑dicarboxylates based on whole biomass Ester, which is used to prepare modified bismaleimide resin. The modified bismaleimide resin prepared by the present invention has excellent thermal properties and rigidity; the preparation method adopts 2,5 furandicarboxylic acid and eugenol from biomass, and the raw materials are green, environmentally friendly and renewable, and the production process is simple It has broad application prospects in aerospace, electronic information, electrical insulation and other industrial fields.

The invention provides a biodegradable thermoplastic starch resin for a thin-film material, a preparation method thereof and products thereof. The resin comprises the following components in part by weight: 50 to 60 parts of food grade starch, 15 to 20 parts of glycerol, 3 to 10 parts of butanediol, 0.1 to 0.5 part of stearic acid, 0.2 to 0.8 part of calcium stearate, 1.8 to 2.5 parts of monoglyceride, 15 to 25 parts of ethyl-methyl acrylate copolymer and 1 to 10 parts of low-density polyethylene. Compared with the traditional biodegradable thermoplastic starch resin, the biodegradable thermoplastic starch resin provided by the invention has the advantages of good processing performance, high biomass content, high biodegradation rate, very good thermal bonding performance and leakage-proof performance. The biodegradable thermoplastic starch resin can be used for manufacturing bath curtains, sleeves, films, medical bed spreads, surgical pads, disposable gloves, diapers, sanitary towels, table linens or table cloth.

Disclosed are a flame-retardant bismaleimide resin and a preparation method thereof comprising: forming an eugenol salt suspensoid from a whole biomass eugenol in the present of a strong alkali metal base, adding dropwisely a solution of phosphorus oxychloride in methyl chloride to react to obtain a biomass-based phosphate flame-retardant; mixing bismaleimide, 2,2′-diallylbisphenol with the obtained phosphate, curing and posttreating to obtain the flame-retardant bismaleimide resin. Compared with petroleum-based bismaleimide resin, the flame-retardant bismaleimide resin prepared by the present invention is obtained from eugenol derived from biomass, and the raw material is green and renewable. It maintains mechanical properties and processing properties of the petroleum-based bismaleimide resin and has an excellent flame-retardant property. The preparation method provided by the invention has the advantages of low cost and simple production process, and has wide application prospect in the fields of aerospace, electronic information, electrical insulation and the like.

The invention discloses a hyperbranched polyester modified itaconic acid based aqueous light-cured resin, and a preparation method thereof. The hyperbranched polyester modified itaconic acid based aqueous light-cured resin is mainly prepared from following raw materials: itaconic acid, 1,4-butanediol, hyperbranched polyester polyol, epoxy acrylate, an esterification catalyst, a polymerization inhibitor, a polycondensation catalyst, a stabilizer, a neutralizer and water. The preparation method comprises the following steps: (1) mixing itaconic acid, 1,4-butanediol, hyperbranched polyester polyol, epoxy acrylate, the esterification catalyst and the polymerization inhibitor, heating under nitrogen protection for reaction, performing thermal insulation pressure-reduced reaction until no more water is generated, stopping reaction, and cooling; (2) adding the polycondensation catalyst and the stabilizer, performing pressure-reduced heating reaction, cooling, adding the neutralizer, adding water, and obtaining of a finished product. The hyperbranched polyester modified itaconic acid based aqueous light-cured resin is large in color, high in curing speed, hardness, adhesion force, flexibility, water resistance, and biomass content, and is friendly to the environment; the method is simple; no solvent is added in the preparation process; cost is low; and the preparation method is suitable for industrial production.