34results about "Monocomponent polyureas artificial filament" patented technology

The present invention relates to a preparation method of polyurethaneurea elastic fiber, particularly a preparation method of high heat-resistant elastic fiber which retains unique physical properties of elastic fiber under the high temperature process. The polyurethaneurea elastic fiber of the present invention is characteristically prepared without using 1 functional mono-alcohol generally usedto regulate the reaction speed and side-reaction during the prepolymer reaction to produce elastic fiber having excellent heat- resistance particularly for the dyeing processing or re-dyeing of polyester but using ethylenediamine alone as a chain extender for the polymerization. To reduce gel formation in polymer after the secondary polymerization and to regulate change of viscosity in the courseof process, the ratio of the chain extender amine to the terminal group of prepolymer of the first polymerization is increased. The present invention relates to the polyurethaneurea elastic fiber andthe preparation method of the same having excellent chlorine resistance, which favors the production of swimsuit by two-way knitting using nylon yarn. The polyurethaneurea elastic fiber prepared by the polymer mixture of the present invention has excellent heat- resistance and chlorine-resistance, so that it is endurable in chlorine -containing water of swimming pool and can be effectively produced as high quality yarn by combined-weaving of nylon or polyester.

The invention relates to a production method of polyurethane urea elastic fiber with high heat setting efficiency. The method comprises the steps of: reacting with polytetramethylene ether glycol, 4,4'diphenylmethane diisocyanate and isophorone diisocyanate in solvent to obtain isocyanate-terminated prepolymer; adding monamine compound and bis(secondary amine) compound mixed amine organic amide solution into the prepolymer for performing first chain extension, and then adding monamine compound and bis(primary amine) compound mixed amine organic amide solution for performing second chain extension to obtain polyurethane urea solution, and finally adding properly organic amide solution with low-volatile diamine and / or triamine compound into the stock solution; finally, adding 4,4'diphenylmethane urea derivatives into the generated stock solution with excessive amine; agitating the polyurethane urea stock solution at low speed and curing, then performing dry-process spinning to obtain polyurethane urea elastic fiber. According to the production method, the requirement on the setting efficiency of the polyurethane urea elastic fiber in the special fields can be met.

The invention provides polyurethaneurea compositions comprising poly(tetramethylene-co-ethyleneether) glycol having high number average molecular weight, from about 1900 to about 4000 Dalton. The invention further relates to the use of high number average molecular weight poly(tetramethylene-co-ethyleneether) glycol as the soft segment base material in spandex compositions. The invention also relates to new polyurethane compositions comprising poly(tetramethylene-co-ethyleneether) glycols with such high number average molecular weight, from about 1900 to about 4000 Dalton, and their use in spandex.

The invention discloses carbon dioxide based polyurea and a preparation method and application thereof, belongs to the technical field of macromolecular materials, and solves the technical problem in the prior art that the molecular weight of the carbon dioxide based polyurea prepared by the preparation method of the carbon dioxide based polyurea is low, so that the carbon dioxide based polyurea cannot be further applied. The method comprises the following steps: adding a prepolymer or a sliced prepolymer in a reaction device, then continuously blowing carbon dioxide into the reaction device, and completely reacting amino in the prepolymer so as to generate the carbon dioxide based polyurea, wherein the reaction temperature is 120-400 DEG C, the reaction pressure is 0.1-20 MPa, and the reaction time is 0.5-50h. The carbon dioxide which is continuously blown in the method not only can take away a by-product, water, which is not eliminated in the polymerization of the carbon dioxide under a high pressure but also can be inserted into a reaction system, the average molecular weight of the prepared polyurea is between 5000-50000, and the properties are excellent.

The present invention provides a novel preparation method of colored polyurethaneurea elastic fibers. And, the colored polyurethaneurea elastic fiber produced by the above-mentioned production method of the present invention is provided.

The invention provides polyurethaneurea compositions comprising poly(tetramethylene-co-ethyleneether) glycol having high number average molecular weight, from about 1900 to about 4000 Dalton. The invention further relates to the use of high number average molecular weight poly(tetramethylene-co-ethyleneether) glycol as the soft segment base material in spandex compositions. The invention also relates to new polyurethane compositions comprising poly(tetramethylene-co-ethyleneether) glycols with such high number average molecular weight, from about 1900 to about 4000 Dalton, and their use in spandex.

This invention relates to a polyurethaneurea elastic fiber of which the weatherability is excellent and the preparing method thereof. The invention prepares the polyurethaneurea elastic fiber by adding the formamidine type ultraviolet absorber of formula I to the spinning dope and the strength maintenance rate of the polyurethaneurea elastic fiber is over 90 % after being left for 24 hours at the Fade-O-Meter in which the sunshine carbon arc is installed, wherein, R1 and R2 represent an each alkyl group of 1 to 5 carbon atoms.

This invention relates to a polyurethaneurea elastic fiber of which the weatherability is excellent and the preparing method thereof. The invention prepares the polyurethaneurea elastic fiber by adding the formamidine type ultraviolet absorber of formula I to the spinning dope and the strength maintenance rate of the polyurethaneurea elastic fiber is over 90 % after being left for 24 hours at the Fade-O-Meter in which the sunshine carbon arc is installed, wherein, R1 and R2 represent an each alkyl group of 1 to 5 carbon atoms.

The invention discloses a method of preparing elastic spandex fibers for paper diapers. The method comprises the following steps that (1) polyether diol and diisocyanate are mixed and react to produce prepolymers; (2) the prepolymers are dissolved through dimethylacetamide, then mixed amine is added for chain growth reaction, and segmented copolymer solution is formed; (3) polymer dope is made by mixing, balancing and filtering the segmented copolymer solution; (4) under the continuous action of a certain amount of pressure, the polymer dope is uniformly and quantitatively pressed in a spinning head through a metering pump, and then is squeezed out of pores in a spinneret plate to form a filament trickle, and the filament trickle enters a passageway filled with hot air; (5) the dimethylacetamide in the filament trickle is removed in a volatilization mode, therefore, the concentration of the filament trickle is increased continuously until the filament trickle is solidified, and meanwhile a winding roller operates to enable the filament trickle to be pulled to be thinned and form spandex filaments; (6) the spandex filaments are wound to form elastic spandex fiber products.

Use of urethane or urea group containing polyether compound as a compatibility agent for a polyol composition containing at least two immiscible polyols, is claimed, where the polyether is obtained by reacting at least a di- and / or polyisocyanate (a) with at least a hydrophilic polyether and at least a hydrophobic polyether (b) (both statistically containing at least one hydroxyl, amide and / or imine function), and optionally further compound (c) containing at least one hydroxyl, amide and / or imine function and / or another isocyanate reactive group and carboxylic acid or epoxide function. Use of urethane or urea group containing polyether compound as a compatibility agent for a polyol composition containing at least two immiscible polyols, is claimed, where: the polyether is obtained by reacting at least a di- and / or polyisocyanate (a) with at least a hydrophilic polyether statistically containing at least one hydroxyl, amide and / or imine function, at least a hydrophobic polyether (b) statistically containing at least one hydroxyl, amide and / or imine function, and optionally further compound (c) containing at least one hydroxyl, amide and / or imine function and / or another isocyanate reactive group and carboxylic acid or epoxide function; and (a) is difunctional or polyfunctional. Independent claims are included for: (1) a polyol mixture comprising the compatibility agent and further auxiliary material and additives; (2) a reactive mixture comprising a homogeneous polyol mixture and optionally further auxiliary material and additives, and one or more isocyanates; and (3) the urethane or urea group containing polyether compound.

This invention relates to a polyurethaneurea elastic fiber of which the weatherability is excellent and the preparing method thereof. The invention prepares the polyurethaneurea elastic fiber by adding the formamidine type ultraviolet absorber of formula I to the spinning dope and the strength maintenance rate of the polyurethaneurea elastic fiber is over 90 % after being left for 24 hours at the Fade-O-Meter in which the sunshine carbon arc is installed, wherein, R1 and R2 represent an each alkyl group of 1 to 5 carbon atoms.

An elastic fiber is provided that includes polyurethane and / or polyurethaneurea and an additive such as polystyrene, an acrylic polymer, polyvinylpyrrolidone, copolymers thereof, derivatives thereof, and combinations thereof. The elastic fiber is useful in laminate structures, such as disposable hygiene articles as wells as in knit, woven and nonwoven fabric constructions.

The present invention relates to a preparation method of polyurethaneurea elastic fiber, particularly a preparation method of high heat-resistant elastic fiber which retains unique physical properties of elastic fiber under the high temperature process. The polyurethaneurea elastic fiber of the present invention is characteristically prepared without using 1 functional mono-alcohol generally used to regulate the reaction speed and side-reaction during the prepolymer reaction to produce elastic fiber having excellent heat-resistance particularly for the dyeing processing or re-dyeing of polyester but using ethylenediamine alone as a chain extender for the polymerization. To reduce gel formation in polymer after the secondary polymerization and to regulate change of viscosity in the course of process, the ratio of the chain extender amine to the terminal group of prepolymer of the first polymerization is increased.

The present invention is a fluorescent elastic yarn and method for producing the same. The fluorescent elastic yarn can fluoresce sufficiently to allow a thin elastic yarn to be seen by the naked eye when ultraviolet light is irradiated to the fluorescent elastic yarn by adding a novel organic additive to a polymer or a spinfinish. Therefore, the fluorescent elastic yarn of the present invention is advantageous in that production of inferior covered yarns is prevented.

The present invention addresses the problem of providing a resin with which a heat resistant nonwoven fabric having a fine fiber diameter can be produced by an electrospinning method. The purpose of the present invention is to provide a resin having a structure represented by at least one selected from the group consisting of general formulae (1)-(3), and containing, at the terminal of the main chain, at least one selected from among an alkyl group having 10 or more carbon atoms and a fluoroalkyl group having 4 or more carbon atoms. In general formula (1), each X independently represents a single bond or -NR3-, R1 and R2 each independently represent a C4-30 divalent organic group, and R3 represents a hydrogen atom or a C1-10 monovalent organic group. In general formula (2), R4 represents aC4-30 divalent organic group, and R5 represents a C4-30 tetravalent organic group. In general formula (3), R6 represents a C4-30 divalent organic group, R7 represents a C4-30 trivalent organic group,l, m, and n are each an integer of 0 or more, and 1+m+n is 10 or more. In addition, the structures represented by general formulae (1)-(3) do not necessarily appear in succession.