Abstract:
An object of the present invention is to improve spinnability, productivity, and tensile strength of a polyester fiber containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate).By spinning the polyester resin containing the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) at a high spinning velocity, the spinnability, productivity, and tensile strength of the polyester fiber can be improved.
Abstract:
Provided is a resin composition excellent in processability and productivity, which improves low crystallization rate and improves processability in forming such as injection molding or sheet forming. Provided is a polyester resin composition including a polyester resin (A), a crystallization promoter (B), and pentaerythritol (C).
Abstract:
A resin composition, which can achieve the crystallization effect of pentaerythritol, is provided with good workability.The resin composition includes a thermoplastic resin (A) and pentaerythritol particles (B), wherein 70% or more of the pentaerythritol particles (B) have a particle diameter of 100 μm or less.
Abstract:
A biodegradable polyester resin composition containing 30 to 60 parts by weight of (A) a polylactic acid, 25 to 45 parts by weight of (B) a poly-3-hydroxyalkanoate, and 5 to 25 parts by weight of (C) an aliphatic-aromatic polyester, based on 100 parts by weight in total of (A) the polylactic acid, (B) the poly-3-hydroxyalkanoate, and (C) the aliphatic-aromatic polyester. The biodegradable polyester resin composition further contains 0.05 to 20 parts by weight of (D) pentaerythritol, 10 to 40 pans by weight of (E) a silicate, and 0 to 3 parts by weight of (F) a compatibilizer having an epoxy group, relative to 100 parts by weight in total of (A) the polylactic acid, (B) the poly-3-hydroxyalkanoate, and (C) the aliphatic-aromatic polyester.
Abstract:
An object is to improve slow crystallization that is a drawback of polyhydroxyalkanoates, improve processability in mold processing, such as injection molding, improve processing speed, and suppress blooming from a obtaining molded article.Provided is an aliphatic polyester resin composition including a polyhydroxyalkanoate (A), a vinyl acetate-containing copolymer (B), and pentaerythritol (C), wherein the polyhydroxyalkanoate (A) and the vinyl acetate-containing copolymer (B) are immiscible.
Abstract:
Poly(3-hydroxyalkanoate) foam particles are obtained by: introducing a blowing agent into an aqueous dispersion in a pressure-resistant vessel, the aqueous dispersion containing a crosslinking agent and resin particles containing a poly(3-hydroxyalkanoate); heating the contents of the pressure-resistant vessel to a given temperature in a range of 130 to 150° C.; holding the contents of the pressure-resistant vessel at the given temperature for 5 to 55 minutes; and opening one end of the pressure-resistant vessel to discharge the contents of the pressure-resistant vessel into a low-pressure atmosphere and foam the resin particles. The poly(3-hydroxyalkanoate) is a mixture containing a poly(3-hydroxyalkanoate) copolymer and a poly(3-hydroxybutyrate) homopolymer at a weight ratio of 99:1 to 80:20, and the crosslinking agent is an organic peroxide which is a percarbonate.
Abstract:
An object of the present invention is to inhibit the blooming of pentaerythritol useful as a crystallization nucleating agent for biodegradable polyesters, which are decomposed into water and carbon dioxide by the action of microorganisms, in particular, for polyhydroxyalkanoates. Provided is a polyester resin composition including a polyhydroxyalkanoate (A), an acrylic compound (B), and pentaerythritol (C).
Abstract:
Disclosed herein is an aliphatic polyester resin composition that simultaneously improves slow crystallization, low impact strength, and low tensile elongation that are the drawbacks of a polyhydroxyalkanoate.The aliphatic polyester resin composition comprises: a polyhydroxyalkanoate (A); a graft copolymer (B); and pentaerythritol (C), wherein the graft copolymer (B) is obtained by graft polymerization of a vinyl-based monomer onto at least one rubber selected from the group consisting of a composite rubber (b1) comprising a polyorganosiloxane component and a polyalkyl(meth)acrylate component, an acrylic rubber (b2), and a diene-based rubber (b3) comprising a diene-based monomer.
Abstract:
An object of an embodiment of the present invention is to provide poly(3-hydroxyalkanoate)-based expanded particles and a poly(3-hydroxyalkanoate)-based foamed molded product both of which are obtained by a single expansion treatment and have a high expansion ratio. Provided are poly(3-hydroxyalkanoate)-based expanded particles and a poly(3-hydroxyalkanoate)-based foamed molded product both of which include a poly(3-hydroxyalkanoate) composition containing a non-ionic water-soluble polymer.
Abstract:
Provided are poly(3-hydroxyalkanoate) foam particles in which a gel fraction of the whole foam particles is from 30 to 80% by weight and a difference in gel fraction between inside and outside of the foam particles is 25% by weight or less. Preferably, the foam particles are particles crosslinked by an organic peroxide. Preferably, the organic peroxide has a 1 hour half-life temperature of 114 to 124° C., contains a carbonate group, and is liquid at room temperature.