CN115323776A - Hard rope and fabric thereof, elastic product and surface treatment agent - Google Patents
Hard rope and fabric thereof, elastic product and surface treatment agent Download PDFInfo
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- CN115323776A CN115323776A CN202210921697.0A CN202210921697A CN115323776A CN 115323776 A CN115323776 A CN 115323776A CN 202210921697 A CN202210921697 A CN 202210921697A CN 115323776 A CN115323776 A CN 115323776A
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- isocyanate
- aliphatic isocyanate
- aqueous dispersion
- blocked aliphatic
- cord
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- 239000012756 surface treatment agent Substances 0.000 title claims abstract description 36
- 239000004744 fabric Substances 0.000 title claims description 25
- 239000012948 isocyanate Substances 0.000 claims abstract description 154
- -1 aliphatic isocyanate Chemical class 0.000 claims abstract description 112
- 239000006185 dispersion Substances 0.000 claims abstract description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 150000002513 isocyanates Chemical class 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 24
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 claims description 23
- 238000005470 impregnation Methods 0.000 claims description 20
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 20
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 19
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 19
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 18
- 239000000839 emulsion Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 17
- 239000013638 trimer Substances 0.000 claims description 17
- 229920001577 copolymer Polymers 0.000 claims description 16
- WHIVNJATOVLWBW-PLNGDYQASA-N (nz)-n-butan-2-ylidenehydroxylamine Chemical compound CC\C(C)=N/O WHIVNJATOVLWBW-PLNGDYQASA-N 0.000 claims description 14
- 238000007598 dipping method Methods 0.000 claims description 14
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 13
- SDXAWLJRERMRKF-UHFFFAOYSA-N 3,5-dimethyl-1h-pyrazole Chemical compound CC=1C=C(C)NN=1 SDXAWLJRERMRKF-UHFFFAOYSA-N 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004381 surface treatment Methods 0.000 claims description 3
- 239000012298 atmosphere Substances 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 abstract description 22
- 239000003960 organic solvent Substances 0.000 abstract description 7
- 239000002131 composite material Substances 0.000 abstract 1
- 239000000806 elastomer Substances 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 45
- 239000000243 solution Substances 0.000 description 34
- 239000005060 rubber Substances 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 15
- 239000000835 fiber Substances 0.000 description 15
- 230000001276 controlling effect Effects 0.000 description 13
- 239000000047 product Substances 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 229920000056 polyoxyethylene ether Polymers 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000007858 starting material Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000008234 soft water Substances 0.000 description 3
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 229910001867 inorganic solvent Inorganic materials 0.000 description 2
- 239000003049 inorganic solvent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000003544 oxime group Chemical group 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000012783 reinforcing fiber Substances 0.000 description 2
- 239000013076 target substance Substances 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 150000007824 aliphatic compounds Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000001261 isocyanato group Chemical group *N=C=O 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005596 polymer binder Polymers 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/35—Heterocyclic compounds
- D06M13/355—Heterocyclic compounds having six-membered heterocyclic rings
- D06M13/358—Triazines
- D06M13/364—Cyanuric acid; Isocyanuric acid; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/046—Reinforcing macromolecular compounds with loose or coherent fibrous material with synthetic macromolecular fibrous material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/11—Compounds containing epoxy groups or precursors thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2321/00—Characterised by the use of unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/32—Polyesters
Abstract
The invention belongs to the field of composite materials, and particularly relates to a hard rope and an elastomer product treated by a surface treatment agent. The hard rope is treated by a surface treating agent, the specific stiffness of the hard rope is more than or equal to 13mgf/dtex, the components of the surface treating agent comprise aqueous dispersion of blocked aliphatic isocyanate and/or aqueous dispersion of blocked aliphatic isocyanate, and the components of the aqueous dispersion of the blocked aliphatic isocyanate comprise blocked aliphatic isocyanate and water. The cord treated by the self-emulsified aqueous dispersion surface treating agent containing the blocked aliphatic isocyanate has higher stiffness than the cord treated by the aqueous dispersion of the aromatic isocyanate, and is equivalent to the cord treated by the aqueous dispersion of the solvent-type aromatic isocyanate, so that the problem that the surface treating agent of the existing semi-hardened cord is prepared from an organic solvent or is used in a too high amount when being treated by the aqueous dispersion of the aromatic isocyanate is solved.
Description
Technical Field
The invention belongs to the field of rubber reinforced cords, and particularly relates to a hard cord, a fabric, an elastic product and a surface treatment agent thereof.
Background
Rubber-based power transmission belts, also known as V-belts, for transmitting power are reinforced with continuous long fibers. For example, in patent US9927002B2, a twisted string of continuous filaments is used. The reinforcing cords require a surface treatment with an adhesive to provide the necessary adhesion to the rubber matrix.
Rubber products, such as tires, tapes, hoses, air springs, and the like, are composed of rubber and reinforcing fibers, cords, or fabrics, such as drapery or canvas. The rubber matrix must have good adhesive force with materials such as reinforcing fibers and the like, so that the phenomena of failure such as cavitation and delamination can not occur in use.
The cord is usually divided into a soft cord and a hard cord. The soft rope is mainly used for a wrapping tape in which a finished adhesive tape is wrapped by a layer of rubber-coated fabric, and the hard rope is mainly used for a trimming tape in which no wrapping is needed. However, some fabric tapes, such as power transmission belts of washing machines, require certain stiffness of the reinforcing cords to maintain the stiffness of the rubber belts, while also requiring sufficient softness to maintain a certain elongation of the cords, and cords meeting such use requirements are called semi-hardened cords.
At present, the surface treatment agent using semi-hardened cord is prepared by dissolving aromatic polyisocyanate in diphenylmethane diisocyanate, or polyaromatic isocyanate in organic solvent toluene, however, the use of organic solvents such as toluene is unsafe, easily burns or explodes, and is harmful to the environment and health, and therefore, there is a need for the development of hardening binders using inorganic solvents.
The rubber belt has two types of wrapping belts and trimming belts. In the manufacture of rubber belts or similar articles, the treated cord or fabric is embedded in rubber and vulcanized and cut with a knife in the direction of the cord to a standard width. In the cutting process, if the fibers are not hard enough, neat cuts are not easy to form in the cutting process, burrs are easy to form, the fibers are easy to scatter in use and drag the cords out of the rubber, and the cords are seriously wound on a belt wheel or damage transmission equipment. In order to prevent such a damage phenomenon, one solution is to wind a rubber-attached cloth on the outside of a molded rubber belt to form a cloth wrapping belt, but the transmission efficiency of the rubber belt is reduced by using this method because of the cloth wrapping. Another approach is to increase the stiffness of the cord and to obtain a very clean cut during the cutting process. The method for improving the stiffness of the thread rope generally comprises the step of treating the thread rope or the fabric with a proper adhesive to reach certain hardness or rigidity, so that burrs generated by cutting can be effectively reduced.
A conventional surface treatment agent for hardened cords is a solution of an aromatic polyisocyanate dissolved in, for example, diphenylmethane diisocyanate or a polyaromatic isocyanate in an organic solvent such as toluene as a fiber surface adhesion treatment agent, for example, the methods disclosed in patents CN112878046A, CN106049066A and JP2016502610 a. The aromatic structure has high rigidity and can effectively harden the fiber, while the aliphatic structure can not achieve the aromatic hardening effect and can not reduce burrs generated by cutting. Meanwhile, the treatment using an organic solvent such as toluene is not safe and easily burnt or exploded, and is harmful to the environment and health, and development of an inorganic solvent-based hardening treatment agent is required.
Disclosure of Invention
The application provides a hard rope, a fabric, an elastic product and a surface treating agent thereof, which are used for solving the technical problem that the hard rope treated by dissolving aliphatic isocyanate by using an organic solvent has potential combustion risk in the prior art.
According to the first aspect, the application provides a hard rope, the hard rope is treated by a surface treatment agent, the specific stiffness of the hard rope is more than or equal to 13mgf/dtex, and the components of the surface treatment agent comprise an aqueous dispersion of blocked aliphatic isocyanate and/or an aqueous dispersion of blocked aliphatic isocyanate.
Optionally, the raw material of the blocked aliphatic isocyanate comprises a trimer of hexamethylene diisocyanate; the raw material of the water dispersion of the blocked aliphatic isocyanate also comprises any one of butanone oxime, caprolactam and dimethylpyrazole.
Optionally, the components of the surface treatment agent comprise: the water-based emulsion comprises a closed aliphatic isocyanate water dispersion, water and a synergist, wherein the synergist is any one of glycidyl ether and styrene-butadiene-vinyl pyridine copolymer emulsion.
Optionally, the mass fraction of the blocked aliphatic isocyanate in the surface treating agent is not less than 9%, and/or the mass fraction of the isocyanate in the surface treating agent is not less than 0.86%.
In a second aspect, the present application provides a fabric comprising the stiff cords of the first aspect, wherein the stiffness of the stiff cords in the fabric is greater than or equal to 13mgf/dtex.
In a third aspect, the present application provides an elastomeric article whose components comprise a cord as defined in the first aspect or a fabric as defined in the second aspect.
In a fourth aspect, the present application provides a use of a surface treatment agent for treating a cord, the use comprising: treating the thread rope by using a surface treating agent, wherein the specific stiffness of the treated thread rope is more than or equal to 13mgf/dtex; the components of the surface treatment agent comprise an aqueous dispersion of blocked aliphatic isocyanate and/or an aqueous dispersion of blocked aliphatic isocyanate, and the components of the aqueous dispersion of blocked aliphatic isocyanate comprise blocked aliphatic isocyanate and water;
the raw material of the blocked aliphatic isocyanate comprises trimer of hexamethylene diisocyanate;
the raw material of the water dispersion of the blocked aliphatic isocyanate also comprises any one of butanone oxime, caprolactam and dimethylpyrazole;
and/or the presence of a gas in the atmosphere,
the components of the surface treating agent comprise: the water-based emulsion comprises a closed aliphatic isocyanate water dispersion, water and a synergist, wherein the synergist is any one of glycidyl ether and styrene-butadiene-vinyl pyridine copolymer emulsion.
In a fifth aspect, the present application provides a method of controlling stiffness of a hard rope, the method comprising the steps of:
obtaining a surface treatment agent, wherein the components of the surface treatment agent comprise an aqueous dispersion of blocked aliphatic isocyanate and/or an aqueous dispersion of blocked aliphatic isocyanate, and the components of the aqueous dispersion of blocked aliphatic isocyanate comprise blocked aliphatic isocyanate and water;
dipping the cord with a dipping solution containing the surface treating agent of the fourth aspect;
and controlling the mass concentration of the isocyanic acid radical and/or the isocyanate in the impregnation liquid to be a preset concentration so as to realize the control of the stiffness of the hard rope.
Optionally, the mass fraction of the isocyanato group in the impregnation liquid is more than or equal to 0.86%.
Optionally, the mass fraction of isocyanate in the impregnation liquid is not less than 9%.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the surface treating agent provided by the embodiment of the application, the cord is treated by using the self-emulsified aqueous dispersion containing aliphatic isocyanate or the aqueous dispersion containing blocked aliphatic isocyanate, the stiffness of the hard cord is higher than that of the hard cord treated by dissolving aromatic isocyanate with an organic solvent, and the hard cord is equivalent to the cord treated by using the aqueous dispersion of solvent-based aromatic isocyanate, so that the technical bias that the closed aliphatic isocyanate or the cord treated by containing aliphatic isocyanate is too soft and cannot reach the hardness of the cord treated by aromatic isocyanate in the prior art is solved, and the cord treated by using the aqueous solvent is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic flow chart of adjusting stiffness of a hard rope according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of an immersion treatment method according to an embodiment of the present disclosure;
fig. 3 is a schematic view of a section structure of a rubber product provided in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
According to a typical embodiment of the invention, a hard rope is provided, the hard rope is treated by a surface treatment agent, the specific stiffness of the hard rope is more than or equal to 13mgf/dtex, and the components of the surface treatment agent comprise an aqueous dispersion of blocked aliphatic isocyanate and/or an aqueous dispersion of blocked aliphatic isocyanate.
Specifically, the components of the aqueous dispersion of blocked aliphatic isocyanate comprise blocked aliphatic isocyanate and water, and the aqueous dispersion of blocked aliphatic isocyanate or the aqueous dispersion of blocked aliphatic isocyanate contains epoxy compound and styrene-butadiene-vinyl pyridine copolymer.
The aqueous dispersion of blocked aliphatic isocyanate can be used as a surface treatment agent for treating a cord or fabric, and the cord treated with the aqueous dispersion of self-emulsified blocked aliphatic isocyanate has a higher hardness than the cord treated with the aqueous dispersion of aromatic isocyanate, and corresponds to the cord treated with the aqueous dispersion of solvent-type aromatic isocyanate. When the specific stiffness of the treated hard rope is not less than 13 milligrams of force (mgf)/dtex, the properties of the treated hard rope include: the stiffness is more than or equal to 13mgf/dtex, the flexibility is more than or equal to 40N ∙ m/m, and the process and application requirements are better met.
In some embodiments, the blocked aliphatic isocyanate starting material comprises a trimer of hexamethylene diisocyanate; the raw material of the water dispersion of the blocked aliphatic isocyanate also comprises any one of butanone oxime, caprolactam and dimethylpyrazole.
Hexamethylene diisocyanate reacts with any one of butanone oxime and dimethyl pyrazole respectively to obtain the aqueous dispersion of the aliphatic isocyanate, has self-emulsifying property, and can be used as a surface treating agent for treating rubber cords.
The mechanism of selecting the butanone oxime is that oxime groups of the butanone oxime can react with isocyanic acid radicals, the isocyanic acid radicals are protected at normal temperature after the reaction, the isocyanic acid radicals can be released by dissociation at about 150 ℃, and the released isocyanic acid radicals can react with target substances.
The mechanism of selecting the dimethylpyrazole is that the oxime group of the butanone oxime can react with the isocyanic acid radical, the isocyanic acid radical is protected at normal temperature after the reaction, but the isocyanic acid radical can be dissociated at about 130 ℃ to release the isocyanic acid radical, and the released isocyanic acid radical can react with a target substance.
Specifically, the mass fraction of the blocked aliphatic isocyanate in the aqueous dispersion of the blocked aliphatic isocyanate can be 44-46%; the mass fraction of the blocked aliphatic isocyanate in the aqueous dispersion of blocked aliphatic isocyanate may be 37% to 39%. The raw materials in the water dispersion of the blocked aliphatic isocyanate comprise trimer of Hexamethylene Diisocyanate (HDI), part of isocyanate groups on the trimer react with hydrophilic groups such as low molecular weight polyoxyethylene ether to generate self-emulsifying capacity in water, other isocyanate groups react with butanone oxime, and the mixture is emulsified and diluted to 44-46% of non-volatile content, preferably 45% of non-volatile content by water; isocyanate groups in the water dispersion of the blocked aliphatic isocyanate react with dimethyl pyrazole, and the reaction product is emulsified and diluted to 37-39% of non-volatile content by water.
It should be noted that: the blocking group in the blocked aliphatic isocyanate is at least one of dimethylpyrazole, caprolactam or butanone oxime. The liquid of the aqueous dispersion of the blocked aliphatic isocyanate contains an epoxy compound.
In some embodiments, the components of the surface treatment agent include: the water-based emulsion comprises a closed aliphatic isocyanate water dispersion, water and a synergist, wherein the synergist is any one of glycidyl ether and styrene-butadiene-vinyl pyridine copolymer emulsion.
Specifically, glycidyl ether, a water-soluble epoxy compound, can be used as model number EX313 of tradename chemical; the emulsion of styrene-butadiene-vinylpyridine copolymer contained 40% by mass of non-volatile components and 15% by mass of vinylpyridine in the copolymer, and the model manufactured by Cheng Xiao (Trinseo), which is abbreviated as Pyratex 240, was used.
It should be noted that: the preparation method of the isocyanate containing the blocked aliphatic isocyanate, the glycidyl ether and the water comprises the following steps: weighing water, adding glycidyl ether, stirring, dispersing and dissolving, and then adding the aqueous dispersion of the blocked aliphatic isocyanate and stirring uniformly.
In addition, the preparation method of the emulsion containing the blocked aliphatic isocyanate, water and the styrene-butadiene-vinylpyridine copolymer can be as follows: weighing water, adding the water dispersion of the blocked aliphatic isocyanate, stirring and dispersing, adding the emulsion of the styrene-butadiene-vinyl pyridine copolymer, and stirring uniformly.
The mechanism of selecting the glycidyl ether is that the epoxy compound has an aqueous solution, can form a uniform solution in water, and is favorable for penetrating into fibers to form better cohesive force in tows.
The mechanism of choice for the styrene-butadiene-vinylpyridine copolymer emulsion is that it is a commonly used polymer binder for the surface treatment of fibers, which enhances the adhesion of the fibers to matrix materials such as rubber.
The mechanism for controlling the mass fraction of blocked aliphatic isocyanate in the aqueous dispersion of blocked isocyanate to not more than 20% is that too high a concentration of blocked isocyanate results in too high a cord hardness after impregnation.
In some embodiments, the mass fraction of blocked aliphatic isocyanate in the surface treatment agent is 20% or more.
In a second aspect, the present application provides that the fabric is composed of the hard rope of the first aspect, and the specific stiffness of the hard rope in the fabric is greater than or equal to 13mgf/dtex.
In a third aspect, the present application provides an elastomeric article whose components comprise a cord as defined in the first aspect or a fabric as defined in the second aspect.
In a fourth aspect, the present application provides a use of a surface treatment agent for treating a cord, the use comprising: treating the thread rope by using a surface treating agent, wherein the specific stiffness of the treated thread rope is more than or equal to 13mgf/dtex; the components of the surface treatment agent comprise an aqueous dispersion of blocked aliphatic isocyanate and/or an aqueous dispersion of blocked aliphatic isocyanate, and the components of the aqueous dispersion of blocked aliphatic isocyanate comprise blocked aliphatic isocyanate and water;
the raw material of the blocked aliphatic isocyanate comprises trimer of hexamethylene diisocyanate;
the raw material of the water dispersion of the blocked aliphatic isocyanate also comprises any one of butanone oxime, caprolactam and dimethylpyrazole;
and/or the presence of a gas in the gas,
the components of the surface treating agent comprise: the water-based emulsion comprises a closed aliphatic isocyanate water dispersion, water and a synergist, wherein the synergist is any one of glycidyl ether and styrene-butadiene-vinyl pyridine copolymer emulsion.
In a fifth aspect, the present application provides a method for controlling stiffness of a hard rope, as shown in fig. 1, the method comprising the steps of:
obtaining a surface treatment agent, wherein the components of the surface treatment agent comprise an aqueous dispersion of blocked aliphatic isocyanate and/or an aqueous dispersion of blocked aliphatic isocyanate, and the components of the aqueous dispersion of blocked aliphatic isocyanate comprise blocked aliphatic isocyanate and water;
dipping the cord by using dipping liquid containing the surface treating agent;
and controlling the mass concentration of the isocyanic acid radical and/or the isocyanate in the dipping solution to be a preset concentration so as to realize the control of the stiffness of the hard rope.
In some embodiments, the mass fraction of isocyanate groups in the impregnating solution is 0.86% to 4.5%, and/or the mass fraction of isocyanate groups in the impregnating solution is 9% to 45%.
In some embodiments, the mass fraction of blocked aliphatic isocyanate in the surface treatment agent is 20% or more.
In some embodiments, the mass fraction of aliphatic isocyanate groups in the surface treatment agent is 4.0% to 4.5%.
The mechanism for controlling the mass fraction of blocked aliphatic isocyanate in the aqueous dispersion of blocked isocyanate to not more than 20% is that too high a concentration of blocked isocyanate results in too high a cord hardness after impregnation.
The mechanism that the mass fraction of the aliphatic isocyanate in the surface treating agent is 4.0-4.5% is that too high concentration of the aliphatic isocyanate can cause the hardness of the impregnated cord to be too high, and too low concentration of the aliphatic isocyanate can cause the cord hardness to be too low, so that the treatment effect is not achieved, and the cord is still in a soft state when not treated.
According to an exemplary embodiment of the present invention, there is provided a method of controlling stiffness of a hard rope, the method comprising the steps of:
obtaining a surface treatment agent, wherein the components of the surface treatment agent comprise aqueous dispersion of blocked aliphatic isocyanate and/or aqueous dispersion of blocked aliphatic isocyanate, and the components of the aqueous dispersion of blocked aliphatic isocyanate comprise blocked aliphatic isocyanate and water;
dipping the cord with a dipping solution containing a surface treating agent;
and controlling the mass concentration of the isocyanic acid radical and/or the isocyanate in the dipping solution to be a preset concentration so as to realize the control of the stiffness of the hard rope.
Specifically, the yarn may be 2 strands of 1100dtex polyethylene terephthalate continuous filament yarn twisted in the Z direction and with a twist of 190 twists/m. 3 strands of this twisted fiber were then twisted in the reverse direction S at a twist of 110 twists/m and the resulting strand product was designated PET1100dtex/2X3. The chemical component of the cord may be at least one of polyester, aramid, or polyamide. The method is characterized in that the initial soft rope with certain strength, elasticity and elongation is treated by the method, so that the specific stiffness of the treated rope is more than or equal to 13mgf/dtex, and the fracture toughness is more than or equal to 6mN ∙ m/m/dtex.
The isocyanate reacts with the fiber by controlling the mass concentration of the isocyanate in the impregnation liquid, and the purpose of regulating and controlling the stiffness of the hard rope can be realized due to the mechanism that the isocyanate is released by deblocking at high temperature to react with the fiber.
In some embodiments, the mass fraction of isocyanate groups in the impregnating solution is 0.86% to 4.5%, and/or the mass fraction of isocyanate groups in the impregnating solution is 9% to 45%.
The positive effect of moderate reaction with the fiber is achieved by controlling the mass fraction of the isocyanic acid radical in the impregnating solution to be 0.86-4.5% and/or controlling the mass fraction of the isocyanate in the impregnating solution to be 9-45%, so that the thread rope is not too soft or too hard.
According to an exemplary embodiment of the present invention, there is provided a hard cord treated with the surface treatment agent according to the first aspect, the hard cord having a specific stiffness of not less than 13mgf/dtex.
According to an exemplary embodiment of the present invention, there is provided a fabric treated with the surface treatment agent according to the first aspect, wherein the stiffness of the hard cord in the fabric is not less than 13mgf/dtex.
According to a typical embodiment of the present invention there is provided an elastomeric article, the components of which comprise the cord of the third aspect or the fabric of the fourth aspect.
Specifically, elastomeric articles include, but are not limited to, tires or rubbers, such as belts, conveyor belts, power transmission belts, hoses, belts, conveyor belts, and bellows.
The process of the present invention will be described in detail below with reference to examples, comparative examples and experimental data.
The experiment consumptive material and reagent include: x313, tradename chemical company, a glycidyl ether, is a water-soluble epoxy compound; PM200, polymeric p-diphenylmethane diisocyanate, denoted pMDI, manufactured by Vanhua chemical company; pyratex 240, a styrene-butadiene-vinylpyridine copolymer emulsion in which the non-volatile matter content is 40% by mass, the vinylpyridine content in the copolymer is 15%. Manufactured by Cheng Xiao company (Trinseo); toluene and water, preferably soft water.
Cord: 2 strands of 1100dtex polyethylene terephthalate continuous long fiber are twisted, the twisting direction is Z direction, and the twist degree is 190 twists/m. 3 strands of this twisted fibre were then twisted in the reverse direction S, with a twist of 110 twists/m, and the product obtained was denoted PET1100dtex/2X3.
Preparing an aqueous dispersion containing blocked isocyanate and glycidyl ether: firstly weighing soft water, then adding glycidyl ether, stirring, dispersing and dissolving, then adding the aqueous dispersion of the blocked isocyanate, and uniformly stirring.
Preparing an aqueous dispersion containing blocked isocyanate and a styrene-butadiene-vinylpyridine copolymer emulsion: firstly weighing soft water, then adding the water dispersion of the blocked isocyanate, stirring and dispersing, then adding the emulsion of the styrene-butadiene-vinylpyridine copolymer, and uniformly stirring;
pMDI/toluene solution: 45 grams of toluene were weighed and 5 grams of pMDI was added to the toluene to dissolve well. Expressed as 10% pMDI/toluene.
Example 1
The embodiment of the application provides a surface treating agent, the components of the surface treating agent comprise an aqueous dispersion of blocked aliphatic isocyanate, and at the same time, the surface treating agent can be regarded as an aqueous dispersion of blocked aliphatic isocyanate, the components of the aqueous dispersion of blocked aliphatic isocyanate comprise blocked aliphatic isocyanate and water, and the content of the isocyanate in the aqueous dispersion of the blocked aliphatic isocyanate is 4.3 percent by weight.
The aqueous dispersion of internally emulsified blocked aliphatic isocyanate is trimer of Hexamethylene Diisocyanate (HDI), partial isocyanate group on the trimer reacts with hydrophilic group such as polyoxyethylene ether with low molecular weight to generate self-emulsifying capacity in water, other isocyanate group reacts with butanone oxime, and the isocyanate is emulsified and diluted by water until the mass fraction of the isocyanate is 45%. The isocyanate content in the aqueous dispersion was 4.3% by weight. The starting material is identified with feedstock a.
Mixing the raw material A with water according to the mass ratio of 2; dipping the cord by using a dipping solution containing a surface treating agent, as shown in figure 2; controlling the mass concentration of isocyanic acid radical and/or isocyanate in the impregnation liquid to be a preset concentration so as to realize the control of the stiffness of the hard rope; the cut surface of the obtained rubber product is flat as shown in FIG. 3.
Example 2
The embodiment of the present application is different from embodiment 1 in that: mixing the raw material A and water according to the mass ratio of 20; the mass fraction of isocyanate in the impregnation liquid is 9%; the mass fraction of isocyanic acid radical in the impregnating solution is 0.86%.
Example 3
The embodiment of the present application is different from embodiment 1 in that: mixing water: EX313: mixing the raw material A according to the mass ratio of 63; the mass fraction of isocyanate in the impregnating solution is 13.5%; the mass fraction of isocyanic acid radical in the impregnating solution is 1.29%.
Example 4
The embodiment of the present application is different from embodiment 1 in that:
an aqueous dispersion of a blocked aliphatic isocyanate which is internal emulsified is a trimer of Hexamethylene Diisocyanate (HDI), part of the isocyanate groups of the trimer reacting with hydrophilic groups such as low molecular weight polyoxyethylene ether to give self-emulsifying ability in water, the other isocyanate groups reacting with caprolactam emulsified with water diluted to a non-volatile content of 30%. The isocyanate content in the aqueous dispersion was 3.0% by weight. The starting material is identified with feedstock C.
Mixing the raw material C and water according to the weight ratio of 30:70 to obtain an impregnation liquid; the mass fraction of isocyanate in the impregnation liquid is 9%; the mass fraction of isocyanic acid radical in the impregnating solution is 0.9%.
Example 5
The embodiment of the present application is different from embodiment 1 in that:
an aqueous dispersion of a blocked internally emulsified aliphatic isocyanate is a trimer of Hexamethylene Diisocyanate (HDI) in which a portion of the isocyanate groups are reacted with hydrophilic groups such as low molecular weight polyoxyethylene ethers to produce a self-emulsifying capacity in water and the other isocyanate groups are reacted with dimethylpyrazole and emulsified with water to a non-volatile content of 38%. The isocyanate content in the aqueous dispersion was 4.4% by weight. The raw material is identified by B.
Mixing water: EX313: mixing the raw material B according to the mass ratio of 70; the mass fraction of isocyanate in the impregnating solution is 11.4%; the mass fraction of isocyanic acid radical in the impregnating solution is 1.32%.
Comparative example 1
This comparative example provides an impregnating solution having the composition 10% pMDI/toluene; the configuration method comprises the following steps: 45 grams of toluene were weighed and 5 grams of pMDI was added to the toluene to dissolve well. The mass fraction of isocyanate in the impregnating solution is 10%; the mass fraction of isocyanic acid radical in the impregnating solution is 3.1%.
Comparative example 2
This comparative example provides an impregnation solution having a chemical composition of 5% pMDI/toluene, 10% pMDI/toluene diluted with toluene. The mass fraction of isocyanate in the impregnation liquid is 5%; the mass fraction of isocyanic acid radical in the impregnating solution is 1.55%.
Comparative example 3
The aqueous dispersion of internally emulsified blocked aliphatic isocyanate is trimer of Hexamethylene Diisocyanate (HDI), partial isocyanate groups on the trimer react with hydrophilic groups such as polyoxyethylene ether with low molecular weight to generate self-emulsifying capacity in water, other isocyanate groups react with butanone oxime, and the isocyanate is emulsified and diluted by water until the mass fraction of isocyanate is 45%. The isocyanate content in the aqueous dispersion was 4.3% by weight. The starting material is identified with feedstock a.
The comparative example provides an impregnation fluid comprising the chemical components of: water, EX313 and feedstock a, water: EX313: the raw material A is mixed according to the mass ratio of 84.4; the mass fraction of isocyanic acid radical in the impregnating solution is 0.25%.
Comparative example 4
An aqueous dispersion of a blocked aliphatic isocyanate which is internal emulsified is a trimer of Hexamethylene Diisocyanate (HDI), part of the isocyanate groups of the trimer reacting with hydrophilic groups such as low molecular weight polyoxyethylene ether to give self-emulsifying ability in water, the other isocyanate groups reacting with caprolactam emulsified with water diluted to a non-volatile content of 30%. The isocyanate content in the aqueous dispersion was 3.0% by weight. The starting material is identified with feedstock C.
The present comparative example provides an impregnation solution comprising the chemical components of water: EX313: C =70, and the mass fraction of isocyanate in the impregnation liquid is 4.97%; the mass fraction of isocyanic acid radical in the impregnating solution is 0.57%.
The components of the surface treatment agents of examples and comparative examples were as shown in tables 1 and 2, and impregnation liquid comprising a blocked aliphatic isocyanate and water was prepared using the prepared surface treatment agents by impregnating PET1100/2 × 3 string with an adhesive treatment liquid on a single-string impregnator (manufactured by litz-square electricity), followed by drying at 160 ℃ for 1 minute and then drying at 247 ℃ for 1 minute and then winding.
And testing the cord after gum dipping, and testing the hardness, or stiffness, of the cord according to GB/T33099-2016. The results obtained are expressed in gram force (gf). The obtained result was converted into acrylic (mgf), and divided by the total fineness of the measured cord expressed in dtex to obtain specific stiffness mgf/dtex. Practical experience proves that when the specific stiffness of the treated wire rope reaches 13 milligrams of force (mgf)/dtex, the stiffness of the wire rope can better meet the cutting requirement. The thread rope with better stiffness is used for rubber products, the cut of a cut rubber sample is more neat, and in the case of a hard rope, the hardness and the flexibility are both noticed, and the stiffness is controlled; conventional practical experience proves that when the specific stiffness of the treated cord reaches 13 milligrams of force (mgf)/dtex, the stiffness of the cord can better meet the cutting requirement.
In addition, tensile testing was also carried out on the cords according to GB/T32108-2015, according to which standard tests tensile breaking strength and elongation at break were obtained, as well as fracture toughness. The tensile breaking strength is a force (in newtons (N)) required to break a tensile cord. Elongation at break is the percentage of elongation at which the strand is stretched to break. The fracture toughness is the total work required to elongate the cord from the onset of stress to failure by tensile failure divided by the nominal linear density of the cord before immersion treatment in dtex. In this example, the nominal linear density before the strand impregnation treatment was 6600dtex.
The test results are shown in tables 1 and 2.
Table 1 shows the test results of the comparative examples.
| Item | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 |
| Isocyanate content (mass fraction) in the impregnation liquid | 10% | 5% | 5.85% | 4.94% |
| Isocyanate content (mass fraction) in impregnating solution | 3.1% | 1.55% | 0.25% | 0.57% |
| Stiffness (gf) (GB/T33099-2016) | 103.3 | 82.3 | 75.3 | 51.6 |
| Stiffness to ratio (mgf/dtex) | 15.7 | 12.5 | 11.4 | 7.8 |
| Fracture toughness | 40.85 | 43.10 | 44.60 | 43.88 |
| Breaking strength | 469 | 480 | 413 | 426 |
| Elongation at break | 8.82% | 8.98% | 10.8% | 10.3 |
Table 2 shows the test results of the examples.
| Item | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Isocyanate content (mass fraction) in the impregnation liquid | 45% | 9% | 13.5% | 9% | 11.4% |
| Isocyanate content (mass fraction) in impregnating solution | 4.3% | 0.86% | 1.29% | 0.9% | 1.32% |
| Stiffness (gf) (GB/T33099-2016) | 117.1 | 88.0 | 95.1 | 93.8 | 91.4 |
| Stiffness to ratio (mgf/dtex) | 17.7 | 13.3 | 14.4 | 14.2 | 13.8 |
| Fracture toughness (N ∙ m/m) | 45.59 | 47.93 | 47.12 | 49.60 | 48.97 |
| Breaking strength (N) | 450 | 460 | 457 | 467 | 462 |
| Elongation at break | 10.13% | 10.42% | 10.31% | 10.62% | 10.60% |
Conventionally, aliphatic compounds are softer and more flexible than cords obtained by aromatic treatment. However, as can be seen from the above table, when the fiber/cord is treated by deblocking at high temperature using internally emulsified blocked aliphatic isocyanate, the lower content of isocyanate group can make the hard cord have higher specific stiffness than aromatic isocyanate, and higher fracture toughness, fracture strength and elongation at break.
It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The hard rope is characterized in that the hard rope is treated by a surface treatment agent, the specific stiffness of the hard rope is more than or equal to 13mgf/dtex, and the surface treatment agent comprises a water dispersion of closed aliphatic isocyanate and/or a water dispersion of closed aliphatic isocyanate.
2. The hard cord according to claim 1, characterized in that the raw material of the blocked aliphatic isocyanate comprises a trimer of hexamethylene diisocyanate; the raw material of the water dispersion of the blocked aliphatic isocyanate also comprises any one of butanone oxime, caprolactam and dimethylpyrazole.
3. The hard cord of claim 2 wherein said surface treatment comprises the composition of: the water dispersion comprises a closed aliphatic isocyanate water dispersion body, water and a synergist, wherein the synergist is any one of glycidyl ether and styrene-butadiene-vinyl pyridine copolymer emulsion.
4. The hard cord according to claim 1, wherein the mass fraction of blocked aliphatic isocyanate in the surface treatment agent is not less than 9%, and/or the mass fraction of isocyanate in the surface treatment agent is not less than 0.86%.
5. A fabric, characterized in that it is composed of the cord according to any one of claims 1-4, the stiffness of the cord in the fabric being equal to or greater than 13mgf/dtex.
6. An elastomeric article characterized in that the components of the elastomeric article comprise a cord according to any one of claims 1 to 4 or a fabric according to claim 5.
7. Use of a surface treatment agent for treating a strand, said use comprising: treating the thread rope by using a surface treating agent, wherein the specific stiffness of the treated thread rope is more than or equal to 13mgf/dtex; the components of the surface treatment agent comprise an aqueous dispersion of blocked aliphatic isocyanate and/or an aqueous dispersion of blocked aliphatic isocyanate, and the components of the aqueous dispersion of blocked aliphatic isocyanate comprise blocked aliphatic isocyanate and water;
the raw material of the blocked aliphatic isocyanate comprises trimer of hexamethylene diisocyanate;
the raw material of the water dispersion of the blocked aliphatic isocyanate also comprises any one of butanone oxime, caprolactam and dimethylpyrazole;
and/or the presence of a gas in the atmosphere,
the components of the surface treating agent comprise: the water dispersion comprises a closed aliphatic isocyanate water dispersion body, water and a synergist, wherein the synergist is any one of glycidyl ether and styrene-butadiene-vinyl pyridine copolymer emulsion.
8. A method of controlling the stiffness of a hard rope, comprising the steps of:
obtaining a surface treating agent, wherein the components of the surface treating agent comprise an aqueous dispersion of blocked aliphatic isocyanate and/or an aqueous dispersion of blocked aliphatic isocyanate;
dipping the cord with a dipping solution containing the surface treating agent according to claim 7;
and controlling the mass concentration of the isocyanic acid radical and/or the isocyanate in the dipping solution to be a preset concentration so as to realize the control of the stiffness of the hard rope.
9. The method as claimed in claim 8, wherein the mass fraction of isocyanate groups in the impregnating solution is not less than 0.86%.
10. The method as claimed in claim 8, wherein the mass fraction of isocyanate in the impregnation liquid is not less than 9%.
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| CN114277573A (en) * | 2021-12-31 | 2022-04-05 | 青岛天邦线业有限公司 | Adhesive and fiber treated by same, textile fabric product, composite material and product |
| CN114753156A (en) * | 2022-04-29 | 2022-07-15 | 浙江百傲新材料有限公司 | Gum dipping polyester cord and production process thereof |
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| CN109652985A (en) * | 2018-12-19 | 2019-04-19 | 青岛天邦线业有限公司 | A kind of maceration extract and its application method enhancing aramid cord and ethylene propylene diene rubber bonding force |
| CN112878046A (en) * | 2020-12-30 | 2021-06-01 | 青岛天邦线业有限公司 | Pretreatment liquid for dipping aramid fiber hard cord and dipping method of aramid fiber hard cord |
| CN114277573A (en) * | 2021-12-31 | 2022-04-05 | 青岛天邦线业有限公司 | Adhesive and fiber treated by same, textile fabric product, composite material and product |
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