US3123434A - Textile - Google Patents
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- Publication number
- US3123434A US3123434A US3123434DA US3123434A US 3123434 A US3123434 A US 3123434A US 3123434D A US3123434D A US 3123434DA US 3123434 A US3123434 A US 3123434A
- Authority
- US
- United States
- Prior art keywords
- yarn
- acrylonitrile
- potassium
- polymer
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000004753 textile Substances 0.000 title claims description 16
- 229920000642 polymer Polymers 0.000 claims description 38
- NLHHRLWOUZZQLW-UHFFFAOYSA-N acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 32
- 230000003068 static Effects 0.000 claims description 26
- 229920001577 copolymer Polymers 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 18
- 150000003839 salts Chemical class 0.000 claims description 18
- 239000011780 sodium chloride Substances 0.000 claims description 18
- 239000000178 monomer Substances 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 10
- 229920001519 homopolymer Polymers 0.000 claims description 10
- 150000007513 acids Chemical class 0.000 claims description 8
- NLVXSWCKKBEXTG-UHFFFAOYSA-N Vinylsulfonic acid Chemical compound OS(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-N 0.000 claims description 6
- XEEYSDHEOQHCDA-UHFFFAOYSA-N 2-methylprop-2-ene-1-sulfonic acid Chemical compound CC(=C)CS(O)(=O)=O XEEYSDHEOQHCDA-UHFFFAOYSA-N 0.000 claims description 4
- UIIIBRHUICCMAI-UHFFFAOYSA-N prop-2-ene-1-sulfonic acid Chemical compound OS(=O)(=O)CC=C UIIIBRHUICCMAI-UHFFFAOYSA-N 0.000 claims 2
- 239000000835 fiber Substances 0.000 description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 28
- 239000003054 catalyst Substances 0.000 description 22
- QIFCIFLDTQJGHQ-UHFFFAOYSA-M potassium;2-phenylethenesulfonate Chemical compound [K+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 QIFCIFLDTQJGHQ-UHFFFAOYSA-M 0.000 description 22
- 239000000243 solution Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 18
- 238000009987 spinning Methods 0.000 description 18
- 229920002239 polyacrylonitrile Polymers 0.000 description 16
- HWDDJFFLFNQAFQ-UHFFFAOYSA-M potassium;4-ethenylbenzenesulfonate Chemical compound [K+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 HWDDJFFLFNQAFQ-UHFFFAOYSA-M 0.000 description 16
- 229920002994 synthetic fiber Polymers 0.000 description 16
- 238000006116 polymerization reaction Methods 0.000 description 14
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 12
- 239000012209 synthetic fiber Substances 0.000 description 12
- 239000007864 aqueous solution Substances 0.000 description 10
- 239000006185 dispersion Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 239000000523 sample Substances 0.000 description 10
- 150000003460 sulfonic acids Chemical class 0.000 description 8
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tBuOOH Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 8
- -1 vinyl halides Chemical class 0.000 description 8
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 239000012153 distilled water Substances 0.000 description 6
- 238000005108 dry cleaning Methods 0.000 description 6
- 238000000578 dry spinning Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- CERQOIWHTDAKMF-UHFFFAOYSA-M methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 6
- 238000002166 wet spinning Methods 0.000 description 6
- USHAGKDGDHPEEY-UHFFFAOYSA-L Potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- 239000012190 activator Substances 0.000 description 4
- 238000007792 addition Methods 0.000 description 4
- RLDQYSHDFVSAPL-UHFFFAOYSA-L calcium;dithiocyanate Chemical compound [Ca+2].[S-]C#N.[S-]C#N RLDQYSHDFVSAPL-UHFFFAOYSA-L 0.000 description 4
- 239000004815 dispersion polymerization Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010559 graft polymerization reaction Methods 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000009940 knitting Methods 0.000 description 4
- 238000004900 laundering Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000000379 polymerizing Effects 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 4
- 229940001607 sodium bisulfite Drugs 0.000 description 4
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 125000000542 sulfonic acid group Chemical group 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000004758 synthetic textile Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 238000009941 weaving Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-Vinylpyridine Chemical class C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 2
- AGBXYHCHUYARJY-UHFFFAOYSA-M 2-phenylethenesulfonate Chemical compound [O-]S(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-M 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- CYTYCFOTNPOANT-UHFFFAOYSA-N Ethylene tetrachloride Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000036499 Half live Effects 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Incidol Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- FUSUHKVFWTUUBE-UHFFFAOYSA-N Methyl vinyl ketone Chemical compound CC(=O)C=C FUSUHKVFWTUUBE-UHFFFAOYSA-N 0.000 description 2
- 210000004940 Nucleus Anatomy 0.000 description 2
- 239000004698 Polyethylene (PE) Substances 0.000 description 2
- QGQDPZZWVLNRIA-UHFFFAOYSA-M S(O)(O)=O.[Na+].[O-]O.C1(=CC=CC=C1)C(C)C Chemical compound S(O)(O)=O.[Na+].[O-]O.C1(=CC=CC=C1)C(C)C QGQDPZZWVLNRIA-UHFFFAOYSA-M 0.000 description 2
- 210000003491 Skin Anatomy 0.000 description 2
- 229940005550 Sodium alginate Drugs 0.000 description 2
- JVBXVOWTABLYPX-UHFFFAOYSA-L Sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 2
- ORGHESHFQPYLAO-UHFFFAOYSA-N Vinyl radical Chemical class C=[CH] ORGHESHFQPYLAO-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- SGIAKTJHCBPGOS-UHFFFAOYSA-N azanium;ethenesulfonate Chemical compound N.OS(=O)(=O)C=C SGIAKTJHCBPGOS-UHFFFAOYSA-N 0.000 description 2
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 2
- 239000000981 basic dye Substances 0.000 description 2
- 150000008107 benzenesulfonic acids Chemical class 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- 210000004027 cells Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 238000010192 crystallographic characterization Methods 0.000 description 2
- 230000003247 decreasing Effects 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229920000578 graft polymer Polymers 0.000 description 2
- 239000003906 humectant Substances 0.000 description 2
- OYQJFWIXVCUZEO-UHFFFAOYSA-N hydrogen peroxide;thiourea Chemical compound OO.NC(N)=S OYQJFWIXVCUZEO-UHFFFAOYSA-N 0.000 description 2
- 230000003165 hydrotropic Effects 0.000 description 2
- 239000005457 ice water Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 150000008040 ionic compounds Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002074 melt spinning Methods 0.000 description 2
- 125000005395 methacrylic acid group Chemical class 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 150000001451 organic peroxides Chemical class 0.000 description 2
- 150000002923 oximes Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 2
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 235000019394 potassium persulphate Nutrition 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000003638 reducing agent Substances 0.000 description 2
- 230000000717 retained Effects 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- MSXHSNHNTORCAW-UHFFFAOYSA-M sodium 3,4,5,6-tetrahydroxyoxane-2-carboxylate Chemical compound [Na+].OC1OC(C([O-])=O)C(O)C(O)C1O MSXHSNHNTORCAW-UHFFFAOYSA-M 0.000 description 2
- 235000010413 sodium alginate Nutrition 0.000 description 2
- 239000000661 sodium alginate Substances 0.000 description 2
- SZHIIIPPJJXYRY-UHFFFAOYSA-M sodium;2-methylprop-2-ene-1-sulfonate Chemical compound [Na+].CC(=C)CS([O-])(=O)=O SZHIIIPPJJXYRY-UHFFFAOYSA-M 0.000 description 2
- DIKJULDDNQFCJG-UHFFFAOYSA-M sodium;prop-2-ene-1-sulfonate Chemical compound [Na+].[O-]S(=O)(=O)CC=C DIKJULDDNQFCJG-UHFFFAOYSA-M 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229950011008 tetrachloroethylene Drugs 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
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
- D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
- D06M14/08—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of synthetic origin
- D06M14/10—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of synthetic origin of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S260/00—Chemistry of carbon compounds
- Y10S260/21—Polymer chemically or physically modified to impart antistatic properties and methods of antistatic agent addition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
- Y10S8/18—Grafting textile fibers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
- Y10S8/92—Synthetic fiber dyeing
- Y10S8/927—Polyacrylonitrile fiber
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Artificial Filaments (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
TEXTILE FILAMENT ANTI-STATIC GRAFT CU-.
POLYMERS OF ACRYLONITRILE POLYMERS AND SPECIFIC VINYL SULFONIC ACIDS OR WATER-SOLUBLE SALTS THEREOF Richard Nelson Blomberg, Ward, Pa., assignor to E. I. du Pont de Nemours and Company, Wilmington, Del., a corporation of Delaware No Drawing. Filed Dec. 12, 1955, Ser. No. 552,659
5 Claims. (Cl. 8115.5)
This invention relates to a method of improving the static properties of synthetic textile fibers.
The poor electrical conductivity and high dielectric strength of the modern synthetic fibers is well known. As a result, such fibers tend to accumulate electrostatic charges in processing as, for example, in a textile mill or in use as, for example, in a rug. Such charges may be annoying for instance by causing a dress to cling to the body of the wearer, which interferes with the intended hang of the garment; but such properties are worse than annoying in processing, where such static charges, formed through repeated friction of the fiber, may prevent proper spinning, drawing, twisting, winding, weaving or knitting.
Many efforts have been made in the past to alleviate the static properties of such fibers as by treating the spun filaments with a solution or dispersion of an antistatic agent. In general, such attempts have not proved completely satisfactory since the antistatic effect was fugitive to laundering and dry cleaning or in other cases imparted an undesirable property to fiber such as a harsh hand, poor color, or an undesirable odor.
The conductivity of the polymers used for fibers can be increased by the use of copolymers. However, the level of the modifier required for the desired results is so high that the desirable fiber properties of the polymer are drastically reduced. This same objection applies to blends of a conducting substance and a polymer and, in addition, the added substance may be extracted by laundering and dry cleaning.
It is therefore an object of the presentinvention to provide a means of imparting permanent antistatic protection to preformed synthetic fibers. Another object of this invention is to provide a process for polymerizing a monomeric material in the presence of a synthetic fiber made of a polymeric material, in such a fashion that said monomeric material is polymerized and, at the same time is attached or grafted to the synthetic fiber. Other objects will appear in the description that follows.
The objects of this invention have been accomplished by polymerizing an ethylenically unsaturated sulfonic acid or its salt in the presence of a synthetic fiber comprising a homopolymer or copolymer of acrylonitrile.
One manner of testing for static properties is to determine the surface electrical resistivity of a fiber at a given temperature and relative humidity since a low resistance would enable any charges developed to be conducted away. Such resistivity measurements may be made with a megohm bridge (type 544B, General Radio Company), and a probe consisting of two metallic surfaces with a gap of .010 inch which is pressed against the surface of the material being tested by a 300 gram weight. The resistance of cotton thread which is considered to be relatively static free is about 4-6 10 ohms at 72 F. and 63% relative humidity.
Another method of testing the static properties of a yarn is by determining the magnitude of the charge developed in a yarn and how fast a given electrostatic charge on the yarn leaks out. For this purpose an endless belt was formed by plying suflicient strands of the yarn to give 3,123,434 Patented Mar. 3, 1964 2 a total denier of about 400 and then inducing a static charge in it by passing over a grounded aluminum rod of /2 inch diameter. The charge is measured by an electrometer type of detector (model 210, manufactured by Keithley Instruments of Cleveland), modified by the addition of a fan between the yarn and the detector probe and by the addition of an amplifier. The data gives the charge in volts that is developed under standard conditions and the charge decay rate which is related to the time required for V2 of the initial charge to leak off of the strand of filaments after the motion of the endless belt has been stopped.
In the examples, the data given for resistance, charge development, and charge decay rate was obtained by one or more of these methods.
The following examples are given by way of illustration to show the general procedure of accomplishing the invention, but it is to be understood that variations may be made in the percentages, temperatures, catalyst, wetting agent, and reactants. Any of the alkali metal or ammonium salts of ethylenically unsaturated sulfonic acids oro ther sulfoarylethylene acids and their salts may be used as direct substitutes for the potassium pstyrenesulfonate used to illustrate the invention in the examples.
The amount of the potassium styrenesulfonate or one of the equivalents disclosed following the examples may be increased or decreased from the values shown'depending on the results desired, but usually these will be within the range necessary to add a very small amount, sometimes as little as .001%, up to about 10% by weight to the acrylonitrile polymer or copolymer filaments.
Example I An aqueous dispersion of polyacrylonitrile was prepared from 0.10 part potassium persulfate, 2.0 parts sodium lauryl sulfate, 120 parts of water and parts of acrylonitrile. A stainless steel kettle was used, and the free space of the kettle was flushed with nitrogen gas and then sealed. After mixing the contents by relatively mild agitation for 16 to 17 hours at 40 C., the resulting polymer dispersion contained 36% solid material as determined by evaporation of a portion. The aqueous polymer dispersion was diluted with three times its volume of 1% aqueous sodium alginate and extruded through a 20- hole spinneret, the diameter of each hole being .004 inch, into a 2% aqueous solution of calcium thiocyanate. The precipitated filaments traveled 5 inches through the bath and then were passed over a nearly submersed weir into a bath of 58% aqueous calcium thiocyanate at C. The filaments diverged readily and coalesced to a warp of gel filaments in 3 feet of travel. They were washed free from salt in a water bath at 5 C. Finally the filaments were wound at the rate of 8.7 y.p.m. on a bobbin immersed in ice water and stored in a Wet condition.
Fifteen feet of the yarn as produced above was soaked for 10 seconds in a solution of 2 ml. of 60% tertiary butyl hydroperoxide in 50 m1. of water, removed, squeezed to remove excess liquid and then transferred to a solution of A gram of potassium p-styrenesulfonate and A gram of sodium bisulfite in 15 ml. of water for 10 seconds. The yarn was taken out, excess liquid squeezed 05, the yarn rinsed in water and drawn 8 X over a hot pin at- C. The drawn yarn was then scoured in a A percent aqueous solution of sodium lauryl sulfate for 20 minutes, washed with water and the yarn dried. :It was extremely difilcult to induce an electrostatic charge on this yarn at high or low relative humidities by rubbing against rubber, or by usual textile operations, whereas a similar yarn without the added polymerization step readily acquired an appreciable charge upon similar treatment. An infrared spectra of the grafted yarn indicated that between 1% and potassium styrenesulfonate had been chemically attached to the fiber. Mere polymerization on the surface would not have produced this result since the polymeric potassium styrenesulfonate is water soluble and would have been removed in the scouring and washing treatments. Using the same gel yarn as above the procedure was repeated using a,a-azodiisobutyroamidine hydrochloride, cumene hydroperoxide-sodium bisulfite, and hydrogen peroxide-thiourea respectively in place of the tertiary butyl hydroperoxide and NaHSO All these drawn, scoured, and dried yarns displayed significantly lower static than an untreated yarn.
The acrylonitrile in the above polymerization was replaced with 75 parts acrylonitrile and 5 parts of methyl acrylate and the polymerization carried out as before. The dispersion of the resulting acrylonitrile/methyl acrylate (94/6) copolymer was spun in the same manner and the resulting gel yarn treated as before with potassium p-styrenesulfonate and catalyst-activator and drawn. The thoroughly washed and dried yarn that had been submitted to grafting conditions was much less susceptible to acquiring an electrostatic charge than control yarn made of the same polymer and treated in the same manner with the omission of the potassium p-styrenesulfonate and a catalyst-activator system.
Example ll Forty to fifty feet of the yarn prepared in Example I was wound on a bobbin and then treated with the hydroperoxide solution and monomer-sodium bisulfite solution in turn as in Example I. The washed yarn was then drawn 6 X at 100 C. in water, scoured in a detergent, washed in water and dried.
The yarn prepared above had a resistance of X 10 ohms at 65 relative humidity as compared with a resistance of over 1000 X 10 ohms at the same relative humidity of a sample of a control yarn that was prepared in the same manner except for the graft polymerization step.
Measurements on an endless belt of yarn gave the following data:
Relative Half Life of Yarn Humidity, Charge Charge in percent Decay, Volts seconds Grafted Yarn 3g 3 288 Control Item 2 Commercial Polyacrylonitrile 60 300 3:100 Yarn 40 300 4, 000
Example III A solution of polyacrylonitrile in dimethylformamide was dry spun in the conventional manner. As-spun yarn (i.e., the yarn woundup directly from the spinning cell containing about 25% dimethylformamide) was passed at 35 feet per minute over a 1 inch diameter roll which dipped below the surface of a 2% aqueous solution of tertiary butyl hydroperoxide and was immediately carried over a second roll onto which dripped a 0.5% solution of potassium styrenesulfonate containing 0.1% NaHSO The yarn was then passed onto an input roll, heated to about 90 C., and then drawn 4 X by passage over a feed roll, a pin heated to about 150160 C. and a drawing roll in turn. The yarn was scoured minutes in /2% sodium lauryl sulfate at 9095 C. It was then given a wash in cold water and two washes at 80-90 C. followed by a 20-minute wash in distilled water and dried. A control sample was prepared on the same equipment by removing the hydroperoxide and potassium styrenesulfonate baths.
The surface electrical resistivity at 65% relative humidity and 72 F. was between 3 X 10 and 15 X 10 ohms for theformer and from 200 to 1000 X 10 ohms for the control.
Fiber characterization tests show that the potassium styrenesulfonate treatment did not alter the tenacity, initial modulus, ultimate elongation or tensile recovery from 5% elongation. It was surprising that the yarn treated with potassium styrenesulfonate showed a significant increase in abrasion resistance to the control as measured on the Stoll tester.
-An aqueous dye bath was prepared containing 2% of the basic dye CI No. 657 (Victoria Green). The ratio of the bath weight to fiber weight was maintained at 40:1. Both the graft polymer yarn and the control were dyed for two hours at 100 C. The grafted yarn dyed to a moderate shade of green while the control yarn was only dyed to a light shade. Microscope examination of cross sections of the above dyed yarns showed that the grafted yarn was dyed in a thin ring (about 0.1 of the diameter of the filaments) while the control yarn was uniformly stained to a visibly lighter shade. This indicates that the grafting had taken place primarily at or near the surface of the yarn where the concentration of sulfonate groups would be of greatest value in dissipating the surface electrostatic charges. Thus 'a given amount of sulfonate groups on or near the surface of a filament obtained by grafting polymerization would give greater static protection than an equal amount of sulfonate groups distributed homogeneously throughout the filament, as for example by copolymerization or blending.
Example IV The graft polymerization procedureof Example I was repeated with the as-spun yarn of Example III. In addition one treatment was made in which the catalyst was eliminated and another in which the potassium styrenesulfonate was omitted. Similarly the baths of monomers and catalyst were replaced with an aqueous solution of polymeric potassium styrenesulfonate. The resistance of the drawn yarns after scouring and drying of the last three items were all about 1000 times greater than the resistance (which was 4-5 X 10 ohms at 63% RH and 72 F.) of the sample which had been exposed to monomer and catalysts.
Example V An acrylonitrile/potassium para styrenesulfonate (/5) copolymer was made as follows: A solution was formed using distilled, deaerated water (1450 parts), potassium p-styrenesulfonate (4 parts), 5% acetic acid (5 parts) and acrylonitrile (96 parts).
The solution was stirred at 40 C. under nitrogen, and to it was added all at once a mixture of potassium peroxydisulfate (3.2 parts), sodium bisulfite (1.6 parts) and distilled water (50 parts).
Polymerization was continued for one hour under ni trogen at 40 C.; the polymer was then filtered, was washed three times with distilled water using 2000 parts of water each time, and dried at 60 C. under vacuum. The yield of polymer was 81.0 parts. Sulphur analysis, making correction for sulphur originating in the catalyst, indicated that the polymer contained approximately 5% of residue derived from potassium p-styrenesulfonate.
The above polymer was dissolved in dimethylformamide and spun into fiber using conventional dry spinning methods. The yarn was washed, drawn 4 X in atmospheric steam and dried.
As-spun yarn of acrylonitrile homopolymer was treated in a skein with potassium p-styrenesulfonate and catalystactivator as in Example I, washed and drawn under similar conditions as above.
Both the yarn from thecopolymer and the grafted yarn were washed, dried and electrical measurements made under similar conditions with results as given below:
Voltage Developed Resistance at 72 F. and 63% RH, ohms Belt of Yarn Yarn 60% R II Grafted Yarn Yarn From Oopolymer Example VI A solution of a copolymer containing 94% acrylonitrile and 6% methyl acrylate was dry-spun as in Example III and the as-spun yarn was divided into skeins of approximately equal weight. Some of the skeins were treated with potassium p-styrenesulfonate and catalyst, drawn, washed and dried as in Example I. The remaining skeins were given the same treatment with the omission of the grafting step. There was no significant weight difference between the treated skeins and the control skeins.
The resistivity of the control skeins were on the average about 100 times greater than the resistivity of the treated skeins under the same conditions. The improved static properties of the treated yarn persisted after a 30-minute soaking in tetrachloroethylene, a type of dry cleaning agent, initially at 120 C.
This invention is equally applicable to homopolymers and to copolymers of acrylonitrile. Such polymers having 70% or more of acrylonitrile are generally used. Higher acrylonitrile content in the polymers; that is, about 85% or more, is preferred for the advantages in textile properties resulting in, as for example, strength, insolubility, sunlight resistance and other characteristics. Monomers that can be used to make copolymers for this invention include acrylic and methacrylic acids, their amide derivatives and esters, methyl vinyl ketone, vinyl halides, vinyl pyridines and many others as discussed in U.S. 2,456,360 (issued to Arnold on December 14, 1948) and in other places.
Although potassium styrenesulfonate (i.e., potassium styrene-4-sulfonate) has been used to illustrate this invention as a grafting monomer, other members of the same class; namely, sulfoarylethylene acids or their salts can be used in this invention in which the sulfonic acid group can be in either the ortho, meta or para position with respect to the vinyl group. The aromatic nucleus may be substituted with other groups in addition to the sulfonic acid groups. For example, theremay be alkyl, alkoxy and similar groups on the nucleus. Specific examples of benzene sulfonic acids which may be used include the following: 2-methyl-4-vinyl-, 3-methyl- 4- vinyl-, 2-methyl-5-vinyl-, 3,5-dimethyl-6-vinyl-, 2,5-dimethyl 4 vinyl-, 2,5-dimethyl-6-vinyl-, 2,3-dimethyl-6- vinyl-, 3,4-dirnethyl-6-vinyl, 2,4-dimethyl-6-vinyl-, 2,3,5- trimethyl-6-vinyl-, 2-ethyl-4-vinyl-, 3-ethyl-4-vinyl-, and many others. In addition allyl or methallyl sulfonic acids or their. salts such as sodium allylsulfonate and sodium methallylsulfonate as described in U.S. 2,601,256 (issued to Bruson on June 27, 1952) can be used. Also the ethenesulfonic acids or their salts such as ammonium ethene sulfonate as described in U.S. 2,300,920 can be used.
As catalyst for the polymerization there can be used any material which yields unstable free radicals under From Continuous I the conditions of the reaction. Preferably, such catalyst will be water soluble. Examples of the catalyst are the azo compounds of the kind disclosed in U.S. 2,471,951, peroxy compounds such as organic peroxides; e.g., benzoyl peroxide, tertiary butyl hydroperoxide, etc., azines, oximes, amine oxides, and persulfates. Redox polymerizations employing oxygen-yielding catalysts in combination' with a reducing agent, such as sodium bi-sulfite, sodium hydrosulfite, etc., may be used with advantage.
The yarn used in this invention should preferably be in a gel or solvent-swollen state and preferably undrawn. One manner of preparing yarn is by dispersion spinning which is defined as the spinning of a composition com prising a mixture of discrete particles of a water-insoluble fiber-forming polymer in an aqueous medium having a minor proportion of a gellable matrix-forming material dissolved therein into a setting medium with subsequent exposure until the matrix-forming material is coagulated and the discrete polymer articles are immobilized by the resultant matrix and finally coalescing the resulting coagulum with a solvent for the film-forming polymer such as a hydrotropic salt solution. The gel fibers, that is, those coalesced fibers that have not been dried, are particularly suitable for use in this invention. This invention can also be used with the yarns, preferably undrawn, obtained by conventional dry and Wet spinning methods and also by the melt-spinning techniques such as disclosed in U.S. 2,706,674 (issued to Rothrock on April 19, 1955).
The invention can be used in a process that is continuous with spinning. When the process is carried out in separate steps from spinning it is preferable that the gel or swollen structure of the yarn obtained from spinning be maintained until the grafting treatment. When theyarn is swollen predominantly with water as is obtained in dispersion spinning or wet spinning the yarn can be stored in sealed packages, humid closet-s, or can be treated with an aqueous solution of a humectant as taught in U.S. 2,558,735 (issued to Cresswell, July 3, 1951) or 2,558,781 (issued to Pollard, July 3, 1951). If the yarn has been obtained by dry or wet spinning it will be swollen by a solvent or plasticizer for the polymer. The.
swollen structure of such yarns can be retained by storage in a sealed container, e.g., a polyethylene bag or in a closet saturated with vapors of the solvent. All such methods permit an indefinite storage period of the yarn before application of this invention.
Although the illustrations of this invention have shown thorough and repeated scourings and washings, such washings are not necessarily an integral part of the process of this invention. The examples were executed in this manner so that the effects of the invention on the yarn would be due to the invention itself and not to any residual monomer, catalyst or other ionic compounds that might be left in an unextracted yarn. The need for a simple washing or a continuous extraction step of the yarn after drawing in the process of this invention will depend upon subsequent processing of the yarn. Preferably, at some step in the process before such yarn is made into articles of manufacture such as clothing, the residual monomer compounds should be removed in order not to place them in contact with the skin of a person.
This invention is of advantage in that it enables a permanent antistatic protection to be given to synthetic fibers without detracting from the desirable physical properties and aesthetic qualities of such fibers. It can ad: vantageously be applied to all manner of synthetic textile fibers and increases the utility of such fibers in commercial textile processing steps such as spinning, winding, twisting, weaving, knitting, etc., and in addition, when are fabricated into woven goods or knitwear reduces the annoying static characteristics of such articles.
It will be apparent that many widely different embodiments of this invention may be made without departing from the spirit and scope thereof, and therefore it is not intended to be limited except as indicated in the appended claims.
I claim:
1. A textile comprising a filament of a material from the class consisting of homopolymeric acrylonitrile and a copolymer formed from at least 70% acrylonitrile and at least one other copolymerizable unsaturated monomer, the said filament having thermally graft copolymerized to its gel form, substantially at its surface, a static resistant polymer of a monomer of the class consisting of sulfoarylethylene acids, allylsulfonic acid, ethenesulfonic acid, methallylsulfonic acid, and water-soluble salts thereof.
2. The product of claim 1 in which the ethylenically unsaturated sulfonic acid is present in an amount up to about 10% based on the weight of the acrylonitrile polymer.
3. The product of claim 1 in which the acrylonitrile polymer is a homopolymer.
4. The product of claim 1 in which the acrylonitrile polymer is a copolymer.
8 5. The product of claim 1 in which the ethylenically unsaturated sulfonic acid is a polymer of potassium styrenesulfonate.
.References Cited in the file of this patent UNITED STATES PATENTS 2,031,929 Breuers Feb. 25, 1936 2,283,236 Soday May 19, 1942 2,570,094 Bradley Oct. 2, 1951 2,676,896 Cohen Apr. 27, 1954 2,688,008 Chaney Aug. 31, 1954 2,707,709 Buchdahl May 3, 1955 2,723,246 Boyd Nov. 8, 1955 2,794,793 Coover June 4, 1957 2,883,360 Coover Apr. 21, 1959 2,899,262 Stanton Aug. 11, 1959 2,999,056 Tanner Sept. 5, 1961 2,999,772 Burk Sept. 12, 1961
Claims (1)
1. A TEXTILE COMPRISING A FILAMENT OF A MATERIAL FROM THE CLASS CONSISTING OF HOMOPOLYMERIC ACRYLONITRILE AND A COPOLYMER FORMED FROM AT LEAST 70% ACRYLONITRILE AND AT LEAST ONE OTHER COPOLYMERIZABLE UNSATURATED MONOMER, THE SAID FILAMENT HAVING THERMALLY GRAFT COPOLYMERIZED TO ITS GEL FORM, SUBSTANTIALLY AT ITS SURFACE, A STATIC RESISTANT POLYMER OF A MONOMER OF THE CLASS CONSISTING OF SULFOARYLETHYLENE ACIDS, ALLYLSULFONIC ACID, ETHENESULFONIC ACID, METHALLYLSULFONIC ACID, AND WATER-SOLUBLE SALTS THEREOF.
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US3123434D Expired - Lifetime US3123434A (en) | Textile |
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Cited By (1)
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US3768966A (en) * | 1970-12-29 | 1973-10-30 | Japan Exlan Co Ltd | Process for producing lactonized acrylic fibers |
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US2688008A (en) * | 1950-04-26 | 1954-08-31 | American Viscose Corp | Mixed acrylonitrile polymers |
US2707709A (en) * | 1952-09-12 | 1955-05-03 | Monsanto Chemicals | Non-electrostatic resinous molding compositions |
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US2883360A (en) * | 1954-02-03 | 1959-04-21 | Eastman Kodak Co | Polymerization process for preparing modified acrylonitrile polymers |
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US2999056A (en) * | 1956-10-04 | 1961-09-05 | Du Pont | Irradiation bonding of acidic compounds to shaped polymeric structures |
US2999772A (en) * | 1952-11-06 | 1961-09-12 | Du Pont | Coated article comprising a substrate of polyethylene or polyamide and a grafted coating of polytetrafluoroethylene or polymethyl methacrylate |
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US2899262A (en) * | 1959-08-11 | Method and composition for rendering | ||
US2031929A (en) * | 1931-08-18 | 1936-02-25 | Ig Farbenindustrie Ag | Impregnation of materials |
US2283236A (en) * | 1939-06-23 | 1942-05-19 | United Gas Improvement Co | Sulphonated derivatives of polymerized methylstyrene |
US2570094A (en) * | 1950-03-28 | 1951-10-02 | Du Pont | Alkylolamine and morpholine salts of polymerized olefin sulfonic acids |
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US3768966A (en) * | 1970-12-29 | 1973-10-30 | Japan Exlan Co Ltd | Process for producing lactonized acrylic fibers |
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