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WO/2020/068390A1 |
A process for forming stabilizing paraformaldehyde can include heating a formaldehyde solution comprising 30 wt% or more formaldehyde to a temperature ranging from about 70C to about 130C; aging the formaldehyde solution for a sufficient...
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WO/2020/054374A1 |
The purpose of the present invention is to provide a polyacetal resin composition which exhibits improved strength and long term heat resistance without compromising heat resistance quality such as the amount of formaldehyde generated up...
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WO/2020/054730A1 |
A polyoxymethylene which is characterized in that the ratio of low-molecular-weight components having a molecular weight of 10,000 or less is 7.0% or less of the entirety in the molecular weight distribution thereof as determined by gel ...
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WO/2020/050082A1 |
The purpose of the present invention is to provide: a novel polyacetal copolymer which is excellent in terms of production efficiency and mechanical property due to introduction of a group having a new structure; and a production method ...
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WO/2020/026781A1 |
The present invention, in one aspect, provides a method for producing an oxymethylene copolymer which gives molded articles that are inhibited from emitting formaldehyde and can be reduced in yellowness. In producing an oxymethylene copo...
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WO/2020/011993A1 |
An oligomeric resin adduct, compositions comprising the oligomeric resinadduct, and process for making oligomeric resin adduct, wherein the the process includes charging into a reactor a mixture including a vinylic monomer that includes ...
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WO/2020/011873A1 |
The present invention relates to a method for the deactivation of an acid catalyst during the production process of a polyoxymethylene copolymer (cPOM) by adding triisopropanolamine (tris(2-hydroxypropyl)amine) to a mixture which compris...
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WO/2019/244477A1 |
Provided is a polyacetal resin composition capable of minimizing degradation when a molded body thereof comes into contact with an acidic detergent. The present invention provides a polyacetal resin composition containing, with respect t...
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WO/2019/187984A1 |
The purpose of the present invention is to provide a method for producing a polyacetal copolymer, in which any disturbances in mass production less affect the polymerization. The method is for producing a polyacetal copolymer from trioxa...
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WO/2019/173753A1 |
A method of producing dimethoxymethane oligomers (DMMn), the method comprising: reacting a formaldehyde source and dimethoxymethane monomer (DMM1) in the presence of an acidic catalyst to produce a reaction effluent comprising DMMn and u...
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WO/2019/167464A1 |
The purpose of the present invention is to provide a polyacetal copolymer and a polymerization method having excellent production stability and heat stability such as the amount of formaldehyde generated while maintaining the level of ri...
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WO/2019/149597A1 |
Process for the removal of volatile compounds from a tackifier comprising a resin with repeating units of formula I wherein R1 is a linear or branched alkylen group with 1 to 10 carbon atoms and R2 is a linear or branched, saturated or u...
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WO/2019/092619A1 |
Long chain branched polyoxymethylene-polydimethylsiloxane copolymers are described. The copolymers have excellent impact properties, shear thinning and slip wear properties in comparison to a polyoxymethylene polymer not containing polyd...
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WO/2019/092617A1 |
Polyoxymethylene-polydimethylsiloxane block copolymers are disclosed. In one embodiment, the siloxane monomer used to make the polymer is soluble in the polyoxymethylene monomers, namely trioxane. The polymer can be formed having relativ...
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WO/2019/053976A1 |
The present invention addresses the problem of providing a method for manufacturing an oxymethylene copolymer in which the amount of formaldehyde generated from a product thereof is reduced; in particular, the amount of formaldehyde gene...
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WO/2019/012876A1 |
The present invention provides a method for producing a polyacetal fiber that presents an improved whiteness unevenness. According to one embodiment, there is provided a polyacetal fiber production method that yields a polyacetal fiber u...
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WO/2018/163003A1 |
Disclosed is a method of producing formaldehyde from formic acid. The method includes obtaining a gaseous mixture comprising formic acid and water vapor and contacting the gaseous mixture with a metal catalyst in a reaction chamber under...
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WO/2018/134075A1 |
A process for making an oxymethylene polymer comprising polymerizing at least one compound capable of forming -CH2O- repeat units (monomer) in the presence of at least one ester of the general formula I (ester): R1-CO-O-R2 (I) wherein R1...
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WO/2018/114843A1 |
The invention relates to a method for producing a polyoxymethylene bock copolymer, comprising the following steps: providing a polymer starter compound with at least two Zerewitinoff-determined active H atoms and a catalyst component in ...
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WO/2018/084281A1 |
The present invention addresses the problem of providing a method for producing an oxymethylene copolymer, which is capable of producing an oxymethylene copolymer having a high molecular weight with high yield and high economic efficienc...
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WO/2018/037040A1 |
The invention relates to a method for producing a polyurethane polymer, comprising the step of reacting a polyol component with a polyisocyanate component, the polyol component comprising an oxymethylene polyol. The ratio of the polyol c...
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WO/2018/021526A1 |
A quaternary ammonium compound represented by formula (1). [(R1)m(R2)4-mN+]nXn- (1) (In the formula, each R1 independently represents an unsubstituted alkyl group or substituted alkyl group having 1-30 carbon atoms, an aryl group having ...
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WO/2017/216131A1 |
The present disclosure relates to the use of a resin as grinding aid for an ore or mineral, wherein the resin is a monomer-based condensation product comprising at least one monomer having an aldehyde moiety and/or being an aldehyde sour...
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WO/2017/159602A1 |
The present invention provides a method for producing an oxymethylene copolymer which is not susceptible to deterioration due to oxidation, and which is reduced in formaldehyde generation amount, especially in formaldehyde generation amo...
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WO/2017/146421A1 |
The present invention relates to a method for producing a water-based resin, the method eliminating by a chemical means formaldehyde gas generated during production of water-based thermoset resin such as water-based urea resin, water-bas...
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WO/2017/139849A1 |
A method of treatment of viral infection in a subject comprising administering to the subject a copolymer comprising an acrolein derived segment or a polyacrolein oligomer segment and a polyalkylene glycol oligomer segment, the copolymer...
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WO/2017/051811A1 |
This polyacetal resin composition has exceptional durability. The polyacetal resin composition includes 100 parts by mass of a (A) polyacetal resin and 10 parts by mass to 100 parts by mass of a (B) glass filler. A (C) polyacetal resin m...
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WO/2016/147998A1 |
The present invention provides an antimicrobial fiber which has exceptional antimicrobial properties without adding an antimicrobial agent, and in which the antimicrobial properties persist despite repeated washing. Provided is an antimi...
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WO/2016/125358A1 |
Provided is a polyacetal resin composition which is suppressed low in formaldehyde generation, while having high stiffness and high toughness. A production method according to the present invention comprises a step for blending from 0.1 ...
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WO/2016/104065A1 |
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 135 to 300°C in the presence of at least o...
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WO/2016/098029A1 |
A water soluble polyoxymethylene copolymer is described. In one embodiment, the polyoxymethylene copolymer is a liquid at 35°C and is water soluble. The polyoxymethylene copolymer may have a comonomer content of greater than about 60% b...
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WO/2016/077879A1 |
A method of treatment of infection in a subject comprising administering to the subject a copolymer comprising an acrolein derived segment or a polyacrolein oligomer segment and a polyalkylene glycol oligomer segment, the copolymer havin...
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WO/2016/040293A1 |
The present invention provides a gel comprising a physical network formed of polymer chain crystallites interconnected by amorphous chain segments. Functionalization of the chain segments between the crystallites forms a blocky distribut...
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WO/2016/011723A1 |
Disclosed is a paraformaldehyde production method. A formaldehyde solution is used as the raw material, and is evaporated and concentrated to produce fine, soluble, and fluid paraformaldehyde after spray granulation in a spray granulatio...
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WO/2016/011724A1 |
Disclosed is a paraformaldehyde production apparatus, comprising a formaldehyde evaporation and concentration apparatus, a spray granulation tower, a fluidized bed dryer, a cyclonic separator, and a tail gas absorption apparatus. The pre...
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WO/2016/010587A1 |
A method of recycling bis(hydroxyalkyl) terephthalate monomer from a composition comprising a terephthalate-containing polymer includes depolymerizing the terephthalate- containing polymer to provide the bis(hydroxyalkyl) terephthalate; ...
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WO/2015/177208A1 |
Poly-1,3-dioxepane, poly-1,3-dioxolane, polytetrahydrofurane or mixtures thereof are used in molding materials comprising polyoxymethylene or a copolymer containing a majority of oxymethylene units, for improving the flexural toughness o...
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WO/2015/168809A1 |
Self-immolative polymers degrade by an end-to-end depolymerisation mechanism in response to the cleavage of a stabilizing end-cap from the polymer terminus. Examples include homopolymers, mixed polymers including block copolymers, suitab...
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WO/2015/155094A1 |
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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WO/2015/151342A1 |
A process for producing a polyacetal copolymer, the process making catalyst deactivation easy and efficient, requiring no cleaning step, merely requiring simple equipment and simple operation techniques, and rendering a high polymerizati...
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WO/2015/151343A1 |
The purpose of the present invention is to provide a high-quality polyacetal copolymer economically advantageously by a simple process. The present invention comprises: a raw material supply step (S1) of supplying a raw material comprisi...
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WO/2015/135948A1 |
The invention relates to a method for producing polyacetal-polyesters by reacting cyclic anhydrides with aldehydes, characterised in that the reaction of aldehydes with cyclic anhydrides is carried out in the presence of a catalyst and a...
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WO/2015/086452A1 |
The invention relates to a method for producing formaldehyde alkylene carbonate copolymers, said method comprising the step of reacting trimer, oligmer and/or polymer formaldehyde with an alkylene carbonate in the presence of a calatyst....
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WO/2015/077023A1 |
A biodegradable aliphatic polyester which is a reaction product of a functional Michael acceptor and a functional Michael donor, wherein the functional Michael acceptor comprises R1(A)n and the functional Michael donor comprises R2(D)m, ...
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WO/2014/181358A9 |
The present invention discloses isohexide based compounds and their polymers which are derived from renewable resources and are potentially degradable. Also disclosed herein is the synthesis of isohexide based monomers and their polymers...
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WO/2015/008537A1 |
Provided is a method for producing an oxymethylene copolymer continuously and with high polymerization yield, whereby it becomes possible to improve heat stability and the formaldehyde generation amount while keeping MD resistance and fo...
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WO/2015/005169A1 |
The present invention provides a liquid-state trioxane composition having trioxane as a main component and including an antioxidant and at least one alkaline organic compound selected from the group consisting of an amine compound having...
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WO/2015/005206A1 |
The present invention provides a method for producing polydioxolane which includes a step for polymerizing a 1,3-dioxolane compound represented by formula (1) while in the presence of a cationic catalyst, and 10-1500ppm of a sterically h...
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WO/2015/002147A1 |
Provided is a method of producing an oxymethylene copolymer which involves a polymerization step in which trioxanes and a comonomer are cationically polymerized at a polymerization temperature of 135°C-300°C in the presence of a protic...
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WO/2014/198689A1 |
The present invention relates to a method for producing polyethercarbonate-polyoxymethylene block copolymers, comprising the step of polymerising formaldehyde, wherein formaldehyde is polymerised in the presence of a polyethercarbonate h...
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