63 results about "Poly-3-hydroxybutyrate" patented technology

This invention relates to the use of hydroxybutyrate and poly hydroxybutyrate as components of animal feed or feed additives, as well as to compositions, feed additives and feed containing them. The inventors surprisingly found that hydroxybutyrate and poly-hydroxybutyrate, preferably 3-hydroxybutyrate and poly-3-hydroxybutyrate, have a great potential for use in animal feed for modulation of the gut flora. More precisely, it has been found that poly-3-hydroxybutyrate or a microbial strain capable for producing poly-3-hydroxybutyrate can be used as a potential growth promoter or gut flora modulator by releasing SCFA, preferably 3-hydroxy butyric acid, in the gut micro flora. Further, the inventors found that 3-hydroxybutyrate and poly-3-hydroxybutyrate have a great potential for suppressing or inhibiting pathogenic bacteria in the gastro intestinal tract, e.g. have a antimicrobial activity against strains of Vibrio, E. coli and Salmonella.

Methods are provided for producing biodegradable polyhydroxyalkanoates (PHAs) with desired geometry, molecular mass, mechanical and / or physical-chemical properties from glycerol, an inexpensive carbon source and byproduct of the biodiesel industry. Microorganisms capable of converting carbon to PHA can be used to convert biodiesel-glycerol to poly-3-hydroxybutyrate (PHB) or other monomer or copolymer PHAs via fermentation. The microorganisms are cultured in a medium comprising glycerol as a primary carbon source and one or more low molecular mass organic acids as a secondary carbon source. Biomass can be harvested from the culture medium and crude PHA extracted and purified, thereby recovering purified PHA with the desired property. After PHA isolation, a nucleating agent can be added to improve certain physical-chemical properties of the PHA, e.g., crystallization temperature, to enhance performance of the PHA during injection molding.

A resin composition having excellent impact resistance and heat resistance, comprising a poly-3-hydroxybutyrate, and a core-shell latex rubber comprising an acrylic rubber and / or silicone-acrylic rubber copolymer as a core component and polymethyl methacrylate as a shell component, or a specific thermoplastic polyurethane, is disclosed. The resin composition satisfies the following requirements (c) and (d): (c) a crystallization temperature when heated from room temperature to 180° C. at a temperature rising rate of 80° C. / min by a differential scanning calorimeter, maintained at 180° C. for 1 minute, and then cooled at a temperature lowering rate of 10° C. / min is 110-170° C.; and (d) a weight average molecular weight (Mw) in terms of polystyrene conversion when a chloroform soluble component is measured with a gel permeation chromatography is 100,000-3,000,000.

The invention provides a method for catalytic alcoholysis of poly-3-hydroxybutyrate by means of a Bronsted-Lewis double-acid ionic liquid. The method includes the steps that according to a molar ratio of nPHB to n catalysts as 1 to 0.01-0.1, poly-3-hydroxybutyrate and the catalyst Bronsted-Lewis double-acid ionic liquid are mixed, small molecular alcohol is added, and an alcoholysis reaction is conducted at 100-160 DEG C. According to the method for alcoholysis and recycling of poly-3-hydroxybutyrate with the Bronsted-Lewis double-acid ionic liquid as a catalyst to catalyze a waste material PHB, the product obtained with the method is high in purity, and the catalyst is stable in performance and can be repeatedly used. The conversion rate of the material PHB reaches 100%, the product yield reaches 92% or above, the recycled poly-3-hydroxybutyrate is an important chemical raw material, and excellent economic benefits and environmental benefits can be obtained by means of the method.

The invention provides a degradable resin material for operation of an oil and gas field and a preparation method thereof. The method comprises the step of performing a melt-mixing reaction on polymer of two or three of polyglycolic acid, butylene succinate and poly-3-hydroxybutyrate with a chain extender to prepare resin alloy, namely the degradable resin material for operation of the oil and gas field. The degradable resin material prepared by the method can be prepared into flakes, powder, particles, spheres and other shapes, or one of polyglycolic acid, butylene succinate and poly-3-hydroxybutyrate is prepared into flakes, powder, particles, spheres and other shapes. The degradable resin material can be used for temporarily plugging and reducing filtration to protect reservoirs, temporarily plugging blast-holes, constructed reservoirs and the like in various oil and gas field constructing operations, such as well drilling, completion and repairing and acid fracturing. The degradable resin material has the advantages of complete degradability and zero harm to stratum.

The invention discloses a high-strength and anti-impacting natural rubber cable sheathing material. The high-strength and anti-impacting natural rubber cable sheathing material is prepared from the following raw materials: natural rubber, polyvinyl chloride, low-density polyethylene, an ethylene-vinyl acetate copolymer, zinc oxide, stearic acid, sulfur, high-abrasion-resisting furnace black, carbon nanotubes, nano calcium carbonate, montmorillonoid, zirconium diboride, calcium sulfate whiskers, lignocellulose short fibers, cotton short fibers, an accelerant M, an accelerant BZ, a poly-3-hydroxybutyrate-4-hydroxybutyrate, epoxy soybean oil, an anti-aging agent RD, an anti-aging agent MB, p-aminodiphenyl amine, gamma-epoxypropoxy propyltrimethoxysilicane and vinyltriethoxysilane. The high-strength and anti-impacting natural rubber cable sheathing material disclosed by the invention is high in strength, good in anti-impacting performance, excellent in anti-aging performance and long in service life.

This invention relates to the use of hydroxybutyrate and poly hydroxybutyrate as components of animal feed or feed additives, as well as to compositions, feed additives and feed containing them. The inventors surprisingly found that hydroxybutyrate and poly-hydroxybutyrate, preferably 3-hydroxybutyrate and poly-3-hydroxybutyrate, have a great potential for use in animal feed for modulation of the gut flora. More precisely, it has been found that poly-3-hydroxybutyrate or a microbial strain capable for producing poly-3-hydroxybutyrate can be used as a potential growth promoter or gut flora modulator by releasing SCFA, preferably 3-hydroxy butyric acid, in the gut micro flora. Further, the inventors found that 3-hydroxybutyrate and poly-3-hydroxybutyrate have a great potential for suppressing or inhibiting pathogenic bacteria in the gastro intestinal tract, e.g. have a antimicrobial activity against strains of Vibrio, E. coli and Salmonella.

The invention relates to a method for preparing n-butyric acid from poly 3-hydroxybutyrate. The method comprises the following steps that poly 3-hydroxybutyrate is put into a sealed device; hydrogen gas is introduced for eliminating air; after the pressure of initial hydrogen gas is 2 to 6 MPa, stirring reaction is performed for 6 to 36h at 190 to 240 DEG C; the n-butyric acid is obtained. The preparation method provided by the invention has the advantages that catalysts and reaction catalysts are not needed; under the hydrogen gas atmosphere condition, the poly 3-hydroxybutyrate is convertedinto the n-butyric acid through one-step reaction; the conversion rate of the 3-hydroxybutyrate is 100 percent; the yield of the n-butyric acid reaches up to 97 percent; the purity of the n-butyric acid in the obtained liquid product reaches up to 98 percent; the additional continuous separation process of the obtained n-butyric acid product is not needed.

Compositions and methods of making and using of microparticle compositions that provide faster flow or improved injectability through smaller or small-diameter needles have been developed. Notably, the microparticle compositions can be successfully delivered or administered through smaller-diameter needles than other microparticle compositions prepared from biocompatible or biodegradable polymers including, for example, poly(lactide), poly(lactide-co-glycolide), polycaprolactone, or poly-3-hydroxybutyrate. The microparticle compositions can exhibit a higher solids loading for a given needle size and / or faster flow through needles than other microparticle compositions. Further, blending or mixing the polymer of the microparticle composition with other polymer formulations can enhance the injectability of the resulting formulation.

A resin composition having excellent impact resistance and heat resistance, comprising a poly-3-hydroxybutyrate, and a core-shell latex rubber comprising an acrylic rubber and / or silicone-acrylic rubber copolymer as a core component and polymethyl methacrylate as a shell component, or a specific thermoplastic polyurethane, is disclosed. The resin composition satisfies the following requirements (c) and (d):(c) a crystallization temperature when heated from room temperature to 180° C. at a temperature rising rate of 80° C. / min by a differential scanning calorimeter, maintained at 180° C. for 1 minute, and then cooled at a temperature lowering rate of 10° C. / min is 110-170° C.; and(d) a weight average molecular weight (Mw) in terms of polystyrene conversion when a chloroform soluble component is measured with a gel permeation chromatography is 100,000-3,000,000.

The invention relates to a poly-3-hydroxybutyrate-beta-hyoroxyetohxy acetate copolymer, which formula is represented as pattern, wherein x, y are positive integers. The invention further provides a biological synthesis preparation method of the copolymer, which uses gene recombination microbiological fermentation to produce poly-3-hydroxybutyrate-beta-hyoroxyetohxy acetate copolymer. When PHB and HEA are conjugated into copolymer, tissue engineering eliminates body repellent action, with good thermal stability, which content can be adjusted according to demand to adjust rigidity and flexibility. The good biological degradation, biological compatibility and processability of the product expand application in tissue engineering and medicine fields.

The invention relates to a method for synthesizing poly-3-hydroxybutyrate / 3-polyhydroxybutyrate (PHBV) from wooden carbon source domesticated sewage mixed with bacteria. The method comprises the following steps: (1) carrying out hydrolysis and enzymolysis on a wooden biological resource by using a hydrothermal pretreatment method; (2) by taking the hydrolysis and enzymolysis product as a carbon source, domesticating sewage with activated sludge by using an aerobiotic dynamic material supply method, and enriching bacteria capable of synthesizing polyhydroxyalkanoate (PHA); (3) accumulating PHAby controlling an unbalanced nutrition environment, and increasing the yield of PHA, thereby finally confirming that the accumulated PHA is PHBV. With the comparison between dry cell weights of different experiment groups and data of PHBV yields, optimal culture conditions can be acquired. After 9 accumulation cycles of the domesticated activated sludge, 303.7-1084.4 mg / of PHBV can be produced, PHB accounts for 40.45-69.14%, and PHV accounts for 30.86-59.55%; finally, at a pH value of 7 and a total sugar concentration of 1700 mg / , the yield of the PHBV meets the maximum value under a condition of sufficient inorganic salt components and oxygen.