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JP6913443B2 |
To provide a polyacetal copolymer having a stabilized terminal that shows excellent heat stability, less coloring and less foreign matter.A method for producing a polyacetal copolymer includes the terminal stabilization of (A) a polyacet...
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JP2021109948A |
To provide a polyacetal copolymer extrusion method that achieves reduced adherents to an extruder screw.The present disclosure provides a method for extruding a polyacetal copolymer using an extruder and a gear pump provided at the rear ...
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JP6891652B2 |
To provide a biaxial extruder used for manufacturing an oxymethylene copolymer, capable of effectively degassing formaldehyde, and a manufacturing method of the oxymethylene copolymer.A first biaxial extruder 100 mainly has a cylinder 11...
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JP6886784B2 |
To provide a polyacetal resin that has low volatility, and also has reduced occurrences of MDs (mold deposits) and bleeding.In a polyacetal resin, in a crystal structure measured by pulse NMR, the percentage of a crystal phase is 45 wt%-...
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JP6886785B2 |
To provide a polyacetal resin that has low volatility, and also has reduced occurrences of MDs (mold deposits) and bleeding.In a polyacetal resin, in a crystal structure measured by pulse NMR, the relaxation time of an intermediate phase...
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JP6877226B2 |
A process by which the raw material, a gas comprising mainly hydrogen, carbon monoxide and carbon dioxide is introduced into a first reactor together with a catalyst, in which one or more reactions take place that produce methanol or dim...
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JP6874917B1 |
A method for producing an oxymethylene polymer, which can produce an oxymethylene polymer having a high degree of polymerization with high efficiency while suppressing an increase in the amount of odor generated, has been awaited. Furthe...
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JPWO2020054730A1 |
The ratio of low molecular weight components having a molecular weight of 10,000 or less in the molecular weight distribution obtained by gel permeation chromatography (GPC) using polymethylmethacrylate (PMMA) as a standard substance is ...
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JP6865817B2 |
The present invention relates to a polyoxymethylene resin composition, which has excellent thermal stability and a low weight-reduction rate and thus can be favorably used in various industrial fields and used as an engineering plastic i...
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JP2021050332A |
To provide a curable composition for nano-fabrication for providing better process control than the prior art and/or improving the throughput.A curable composition comprises expanding monomers of at least 10 wt.% based on the total weigh...
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JP6853737B2 |
To provide a manufacturing method of a polyacetal copolymer capable of providing the polyacetal copolymer less in formaldehyde generation amount and high in molecular weight at high polymerization yield stably.There is provided a manufac...
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JP6841811B2 |
The invention relates to a filament comprising a core material (CM) comprising an inorganic powder (IP) and the core material (CM) is coated with a layer of shell material (SM) comprising a thermoplastic polymer. Further, the invention r...
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JP6831634B2 |
To provide a polyoxymethylene resin composition which has such extremely high slidable characteristics that abrasion loss at the time of minute load slide for a long period of time is reduced, especially has excellent slidable characteri...
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JP2021001264A |
To provide a novel polyacetal copolymer excellent in productivity and mechanical characteristics by introducing a group having a new structure and to provide a method for producing the polyacetal copolymer.There are provided: a polyaceta...
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JP6784805B1 |
To provide a polyacetyl resin composition having excellent weather resistance, capable of suppressing the generation of formaldehyde from a molded product to an extremely low level, and stably suppressing a mold deposit during molding. T...
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JP6696434B2 |
The invention provides a method for producing an oxymethylene copolymer including a polymerization step for cationically polymerizing trioxane and a comonomer at a polymerization temperature of from 135 to 300°C in the presence of at le...
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JP6691171B2 |
A polyacetal resin composition capable of minimizing degradation when a molded body thereof comes into contact with an acidic cleaner. The polyacetal resin composition contains with respect to (A) 100 parts by mass of a polyacetal copoly...
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JP2020050966A |
To provide a polyacetal three-dimensional structure which has more excellent heat resistance and chemical resistance properties than, for example, PTFE and PE and which can be manufactured safely at a low cost.The polyacetal three-dimens...
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JP6673539B1 |
One embodiment of the present invention provides a method for producing an oxymethylene copolymer that can suppress the generation of formaldehyde from the molded product and reduce the yellowness of the molded product when it is made in...
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JP2020041130A |
To provide a metal-polyacetal assembly.The invention provides an assembly comprising a polyacetal part and a metal part, where corrosion of the metal part is reduced by incorporating a carbodiimide in the polyacetal part.SELECTED DRAWING...
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JP6632691B2 |
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JP6623055B2 |
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JP6619015B2 |
A polyacetal resin composition has very excellent durability, which includes 100 parts by mass of a polyacetal resin (A) and 10 parts by mass or more and 100 parts by mass or less of a glass filler (B), wherein when a polyacetal resin mo...
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JP6560960B2 |
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JP2019131672A |
To provide a polymer compound that makes it possible to drive an organic EL element at low voltage and improve the life.The present invention provides a polymer compound having a structural unit represented by formula (1), where, R is a ...
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JP6548843B1 |
Poly-1-hydroxymethylethylene hydroxymethylformal (PHF) -based drug delivery systems are provided herein. Methods of making antibody-drug conjugates and methods of treatment using these conjugates are also disclosed.
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JP2019112250A |
To provide an admixture exhibiting excellent flowability, and further capable of suppressing increase of viscosity and reduction of state with the lapse of time, even when used for concrete containing low quality fine aggregate, and a ce...
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JP6520708B2 |
The present invention provides a method for producing an oxymethylene copolymer which involves polymerizing trioxane and a comonomer cationically at a polymerization temperature of 135°C to 300°C in the presence of a protic acid salt h...
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JP6518691B2 |
The invention relates to a process for producing polyoxymethylene block copolymers, comprising the step of activating the DMC catalyst in the presence of an OH-terminated polymeric formaldehyde starter compound by means of a defined amou...
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JP6504742B2 |
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JP6498164B2 |
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JP6447033B2 |
To efficiently prevent fogging of a sight glass for internal observation caused by a contact with a gas generated, by efficient use of an inert gas without a waste.An antifogging device 7 of a sight glass for internal observation of the ...
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JP6438278B2 |
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JP6438270B2 |
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JP6383468B2 |
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JP6383261B2 |
To provide a manufacturing method of a polyacetal copolymer capable of efficiently manufacturing the polyacetal copolymer less in debris and having high purity.There is provided a manufacturing method of a polyacetal copolymer having a s...
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JP6383469B2 |
To provide a quaternary ammonium compound for obtaining a polyacetal resin composition of high purity, where the quaternary ammonium compound prevents the occurrence of formaldehyde, acetaldehyde and acrolein even when subjected to a hea...
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JP6383477B1 |
To provide a quaternary ammonium compound solution suitable for use as a volatile organic compound inhibitor from polyacetal, which has a good color tone and hardly generates formaldehyde, acetaldehyde and acrolein even after heat treatm...
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JP6374014B2 |
Provided is a thiol compound represented by formula (1); (HS-R1-M1-)nL1 (1). In formula (1), L1 denotes an n-valent organic linking group, n denotes an integer between 3 and 15, M1 denotes -O-, -S-, -N(R2)-, -C(=O)-, -C(=O)-O-, -O-C(=O)-...
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JP6329478B2 |
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JP6304252B2 |
The present invention provides a method for storing a trioxane composition usable in a synthesis of a polyacetal resin. The method comprises the step of providing a trioxane composition comprising trioxane as a main component, an antioxi...
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JP6282805B2 |
The present invention provides a high-quality polyacetal copolymer by means of a simple process in an economical manner. The present invention includes: a raw material supply step of supplying a raw material including trioxane and the li...
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JP6241478B2 |
The present invention provides a method for producing a polydioxolane, which includes polymerizing a 1,3-dioxolane compound represented by the formula (1) in the presence of a cationic catalyst and a sterically hindered phenol in an amou...
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JP6225523B2 |
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JP2017160332A |
To provide a polyacetal copolymer which is excellent in mechanical physical properties, durability, impact resistance, thermal stability, moldability and chemical resistance, and reduces a generation amount of formaldehyde; a method for ...
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JP2017160333A |
To provide a polyacetal copolymer which is excellent in mechanical physical properties, durability, thermal aging properties, moldability and chemical resistance, reduces a generation amount of formaldehyde, and is excellent in recycling...
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JP2017149854A |
To provide a method that does not generate yellow coloration or black precipitates even when used for a long time, when a cationic polymerization catalyst is diluted with an organic solvent in a piping.Arithmetic surface roughness of an ...
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JP2017149853A |
To provide a method capable of performing a continuous operation at a high polymerization yield stably over a long period while reducing the using amount of a polymerization catalyst, and further capable of producing a polyacetal copolym...
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JP6189139B2 |
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JP6144272B2 |
The present invention relates to a process for producing cyclic acetal comprising i) preparing a liquid reaction mixture comprising a) formaldehyde source, b) an aprotic compound and c) a catalyst; and ii) converting the formaldehyde sou...
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