212 results about "Polyhydroxyalkanoates" patented technology

The invention discloses a polyhydroxyalkanoate water-based barrier coating composition and application, and belongs to the technical field of packaging materials. The composition takes water as a dispersion medium and comprises polyhydroxyalkanoate, a plasticizer, an emulsifier and an inorganic nano filler. The stable emulsion with the volume average particle size of 400-700nm is prepared under specific proportioning and process conditions. After the emulsion is applied to a paper substrate according to the dry film coating weight of 10-12 g / m, the obtained coating shows good comprehensive performance: the oxygen permeability is not higher than 580 cm / m.d, the water vapor permeability is not higher than 290 g / m.d, and the heat sealing strength at 130 DEG C is not lower than 5.0 N / 15 mm. The biodegradable paper-based packaging film does not contain fluorine compounds, can be completely biodegraded, and provides a technical path for sustainable paper-based packaging.

The invention discloses a degradable PHA / PU composite water-based barrier coating and a coated paper product, and belongs to the field of biodegradable polymer coatings. The coating composition comprises a high proportion of polyhydroxyalkanoates as a barrier phase and a bio-based polyurethane as a toughening and heat sealing phase. The key innovation lies in that the cooperation of rigid barrier and flexible functions is realized by accurately regulating and controlling the ratio of two phases and adopting bio-based crosslinking, and the problem that the barrier property, the heat sealability and the flexibility of a traditional single material are difficult to consider at the same time is solved under the condition of low coating amount. The invention provides a full-life-cycle green packaging solution, aims to replace a polyethylene spraying film and a fluorine-containing coating, and has a remarkable application value in the field of food packaging.

The invention belongs to the field of high polymer materials, and discloses a double-trigger programmable degradable PHA composition and a preparation method thereof. A cured film structure formed by the composition sequentially comprises an outer protective layer, a trigger layer and an inner functional layer from outside to inside, wherein the outer protective layer takes polyhydroxyalkanoate as a base material, a reversible cross-linked network is introduced into the outer protective layer, the trigger layer is provided with humidity and ion double-trigger microcapsules, and the inner functional layer is used for bearing functional auxiliaries. The cured film can maintain low permeability and mechanical stability before application. After application, under the synergistic effect of specific moisture and ions, the trigger layer is activated, so that the cured film is subjected to step-type improvement of moisture permeability in a preset time window, and a through hole is formed. And finally, integral disintegration is realized through physical structure failure. The technology can be applied to the fields of seed coating and the like, the activity of a biological base material can be ensured by adopting a low-temperature process with the temperature lower than 50 DEG C, and unification of stable protection before application and on-demand disintegration after application is achieved.

A biodegradable laminate includes: an aliphatic polyester-based resin layer; a bonding layer; and a polyvinyl alcohol-based resin layer laminated on at least one surface of the aliphatic polyester-based resin layer with the bonding layer therebetween. The aliphatic polyester-based resin layer includes an aliphatic polyester-based resin composition containing an aliphatic polyester-based resin (A) including a repeating unit derived from an aliphatic diol and a repeating unit derived from an aliphatic dicarboxylic acid as main constituent units, a polyhydroxyalkanoate (B) including a 3-hydroxybutyrate unit as a main constituent unit, and an inorganic filler (C).

To provide a composition containing solubilized polyhydroxyalkanoate by which a membrane having excellent cosmetic characteristics can be obtained.SOLUTION: A composition contains a) at least two kinds of different repeating polymer units selected from the following units (A) and (B): -[-O-CH(R1)-CH2-C(O)-]-unit (A) and -[-O-CH(R2)-CH2-C(O)-]-unit (B) and an optical isomer or a geometric isomer thereof, and a solvate thereof such as a hydrate; and b) a fatty medium including one or more kinds of fatty substances which are liquid preferably at 25°C and the atmospheric pressure, where it is to be understood that (A) is different from (B).SELECTED DRAWING: Figure 2

Embodiments of the invention relate generally to processes for the production and processing of polyhydroxyalkanoates (PHA) from carbon sources. In several embodiments, PHAs are produced at high efficiencies from carbon-containing gases through the utilization of a regenerative polymerization system.

A granule for use as an infill for an artificial turf system, wherein said granule comprises substantially amorphous polyhydroxy alkanoate (PHA) and a pigment or pigment masterbatch.

A stretched film according to the present invention contains a poly(3-hydroxyalkanoate) resin (A) and a polylactic acid resin (B). The poly(3-hydroxyalkanoate) resin (A) includes a copolymer (A-1) of a 3-hydroxybutyrate unit and another hydroxyalkanoate unit, said copolymer (A-1) having a hydroxyalkanoate unit content ratio of not less than 10 mol% but less than 24 mol% and a weight-average molecular weight of 700,000 or greater. The copolymer (A-1) content is greater than 20 wt% but not greater than 75 wt% of the total weight of the poly(3-hydroxyalkanoate) resin (A) and the polylactic acid resin (B).

Embodiments of the invention relate generally to methods to generate microorganisms and / or microorganism cultures that exhibit the ability to produce polyhydroxyalkanoates (PHA) from carbon sources at high efficiencies. In several embodiments, preferential expression of, or preferential growth of microorganisms utilizing certain metabolic pathways, enables the high efficiency PHA production from carbon-containing gases or materials. Several embodiments relate to the microorganism cultures, and / or microorganisms isolated therefrom.

This extruded film contains a poly(3-hydroxyalkanoate)-based copolymer (A) and a poly(3-hydroxybutyrate) (B). The copolymer (A) preferably contains at least two types of poly(3-hydroxyalkanoate)-based copolymers having different constituent monomer types and / or constituent monomer content ratios. The copolymer (A) may include a copolymer (A-1) of a 3-hydroxybutyrate unit and another hydroxyalkanoate unit, wherein a content ratio of the other hydroxyalkanoate unit is 24 mol% or more.

To provide a poly(3-hydroxyalkanoate)-based resin-containing film which can be produced with good productivity while avoiding contamination of a production device.SOLUTION: A film contains a poly(3-hydroxyalkanoate)-based resin (A), and a polylactic acid-based resin (B), and does not substantially contain sugar alcohol, wherein a mass ratio (A / B) of the poly(3-hydroxyalkanoate)-based resin (A) to the polylactic acid-based resin (B) is 85 / 15 to 55 / 45. The resin (A) contains a copolymer (A-1) of a 3-hydroxybutyrate unit having a content ratio of other hydroxyalkanoate units of 24 mol% or more and the other hydroxyalkanoate units, and a copolymer (A-2) having a 3-hydroxybutyrate unit having a content ratio of other hydroxyalkanoate units of 1 mol% or more and 9 mol% or less and other hydroxyalkanoate units.SELECTED DRAWING: None

The present invention relates to a manufacturing method for a eugenol-incorporated fragrance microcapsule composed of polyhydroalkanoates and, more specifically, to a manufacturing method for manufacturing a polyhydroxyalkanoate fragrance microcapsule by using water-in-oil-in-water (W1 / O / W2) multiple emulsion.

The present disclosure provides methods for degrading bioplastics. Also provided are articles suitable for degradation of bioplastics. The bioplastic may be a polyhydroxyalkanoate polymer and it may be degraded by an article comprising bacteria and one or more enzymes.

A biopolymer such as poly(gamma glutamic acid) 100, bacterial cellulose (200) and poly(hydroxyalkanoates) (300) synthesised from a biowaste substrate 102, (204, 304) comprising at least one of: a cell

A transformed microorganism having an ability to produce a polyhydroxyalkanoate copolymer containing 3-hydroxyalkanoate monomer units having 8 or more carbon atoms includes: an exogenous gene encoding a polyhydroxyalkanoate synthase having an amino acid sequence of any one of SEQ ID NOS: 1 to 4; or an exogenous gene encoding a protein that has an amino acid sequence having a sequence identity of at least 90% with the amino acid sequence of any one of SEQ ID NOS: 1 to 4 and that has polyhydroxyalkanoate synthase activity.

Provided are microporous and tough PHA-based articles having a knot and fibril structure, as well as processes for making these articles using a less than melt processing manner. In some embodiments, a method of forming a porous expanded PHA composite comprising a porous PHA material can include depositing a partially crystalline polyhydroxyalkanoate (PHA) polymer on a substrate at a deposition temperature below a melting temperature of the PHA polymer to form a PHA-substrate composite, and expanding the PHA-substrate composite at a temperature between the glass transition temperature of the PHA polymer and the melting temperature of the PHA polymer.

The present invention relates to a fiber made from a mixture comprising an aliphatic polyester, an aliphatic-aromatic polyester and a polyhydroxyalkanoate, and to a method for producing such a fiber. The invention also relates to a filament suitable for three-dimensional printing, said filament being made from a mixture comprising an aliphatic polyester, an aliphatic-aromatic polyester and a polyhydroxyalkanoate, and to a method for producing such a filament.

A method for preparing purified polyhydroxyalkanoate of the present invention may lower the b* value of a final product more than the conventional value by means of a decolorization step using two types of oxidizing agents sequentially. In addition, in the present invention, by using sodium chlorite (NaClO2), as a primary oxidizing agent, the effect of improving color is significant, and there is almost no decrease in molecular weight.

Disclosed is a composition of matter comprising: a non-biodegradable polymer selected from a group consisting of polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC) and combinations thereof; an additive comprising a blend or copolymer of (1) a first polymer selected from a poly-lactic acid (PLA), a polyhydroxyalkanoates (PHA) or a combination thereof and (2) a second polymer which is a poly-terephthalate; and wherein the non-biodegradable polymer is present in a concentration from 90-99.9 wt. %, the additive is present in a concentration from 0.1-10 wt. % and the additive has 30-70 wt. % of the first polymer and 30-70% of the second polymer.

The invention relates to a material, suitable for additive manufacturing and in particular for fused deposition modeling, wherein said composite material is obtained by fusion of at least two components: - at least one polymer matrix chosen among polyhydroxyalkanoates (PHA), and - at least one auxiliary filler chosen among biobased fillers consisting of biobased particles comprising lignin, cellulose and hemicellulose, wherein said biobased particles have a lignin / hemicellulose mass ratio from 1 to 6. The invention also relates to an additive manufacturing process and a product obtained by an additive manufacturing process.

The present invention relates to a method for producing granules comprising a polyhydroxyalkanoate, and granules produced thereby, the method comprising: (1) a step of injecting a raw material comprising a polyhydroxyalkanoate (PHA) and an additive into a twin-screw extruder to form a polyhydroxyalkanoate melt; (2) a step of supplying a polyhydroxyalkanoate melt to a template by means of a gear pump; (3) a step of passing the polyhydroxyalkanoate melt through a template to form a polyhydroxyalkanoate melt line; and (4) a step of cutting and crystallizing the polyhydroxyalkanoate melt wire in an underwater pelletizer to form pellets.

A polyhydroxyalkanoate copolymer mixture is produced by culturing a microorganism. The mixture contains: a fraction (I) that contains a polyhydroxyalkanoate copolymer having 3-hydroxybutyrate structural units and 3-hydroxyhexanoate structural units and that has an average 3-hydroxyhexanoate content of 9 to less than 20 mol %; and a fraction (II) that contains a polyhydroxyalkanoate having 3-hydroxybutyrate structural units and that has an average 3-hydroxyhexanoate content of 0 to 8 mol %. The weight percentage of the fraction (II) in the polyhydroxyalkanoate copolymer mixture is 45% or more.

A process for producing polyhydroxyalkanoates (PHA) is provided. The process comprises: providing a waste stream comprising lignocellulosic materials; adding an calcium-containing mineral to the waste stream; heat-treating the waste stream in the presence of the calcium-containing mineral, to obtain a treated waste stream; fermenting at least one strain of PHA-producing microorganism in a culture medium comprising the treated waste stream as a carbon source, to produce the PHA; and extracting the PHA from the PHA-producing microorganism.

The present invention relates to a method for producing polyhydroxyalkanoates (PHAs), and a cell crushing monitoring method, and provides a method for producing polyhydroxyalkanoates (PHAs), the method allowing the length and sphericity of cells or PHAs to be measured through three-dimensional image analysis using the difference in refractive index of cells or PHAs, so that the autolysis degree, feed status, or crushing degree of cells of PHAs is identified, and thus optimum crushing conditions are set and the stability of an impurity removal process, which is a back-end process of a crushing process, can be increased.

The present invention relates to novel carbodiimides, to a process for their production, and to the use of the novel carbodiimides in ester-based polyols, in polyethylene terephthalate (PET), in polybutylene terephthalate (PBT), in polytrimethylene terephthalate (PTT), in copolyesters, in thermoplastic polyester elastomers (TPE E), in ethylene vinyl acetate (EVA), in polylactic acid (PLA) and / or in PLA derivatives, in polybutylene adipate terephthalate (PBAT), in polybutylene succinate (PBS), in polyhydroxyalkanoates (PHA), in blends, in triglycerides, in thermoplastic polyurethanes, in polyurethane elastomers, in PU adhesives, in PU casting resins, for PU coatings or in PU foams as stabilizers.

The present invention concerns a composition for a horticultural pot comprising a solid residue of digestate from methanization and / or a solid residue from composting and a biodegradable polymer chosen from polyhydroxyalkanoates (PHA), its preparation and its use in the manufacture of such a pot.

The technology described herein is directed to engineered chemoautotrophic bacteria and methods of producing sustainable biomolecules. In several aspects, described herein are engineered bacteria and corresponding methods, compositions, and systems for the production of products such as polyhydroxyalkanoates (PHA), sugar feedstocks, and lipochitooligosaccharide (LCO) fertilizers.

A genetically engineered strain of Pseudomonas is provided, which is capable of metabolizing lactose as a sole carbon source in the production of polyhydroxyalkanoates (PHAs). A method of engineering microorganisms and a method of PHA production are also provided, wherein lactose is used as a sole carbon source.

The present invention relates to a composition for electrode active material, and an electrode and secondary battery comprising same, the composition comprising an electrode active material, a binder, and a conductive material, wherein the binder contains polyhydroxyalkanoate (PHA). By containing polyhydroxyalkanoate (PHA) as a binder, the composition for electrode active material: can further improve adhesion between active materials and between an active material and an electrode current collector; has excellent oxidation resistance and is electrochemically stable; and may achieve the long lifespan, high capacity, and high power output of secondary batteries even if the binder is used in a small amount, thereby enabling the use thereof not only in a battery cell that is used as a power source for small devices, but also in the unit cell of medium and large-sized battery modules comprising multiple cells.

A biopolymer such as poly(gamma glutamic acid) 100, bacterial cellulose (200) and poly(hydroxyalkanoates) (300) synthesised from a biowaste substrate 102, (204, 304) comprising at least one of: a cell