US2727804A - Bleaching of polyamides - Google Patents
Bleaching of polyamides Download PDFInfo
- Publication number
- US2727804A US2727804A US347839A US34783953A US2727804A US 2727804 A US2727804 A US 2727804A US 347839 A US347839 A US 347839A US 34783953 A US34783953 A US 34783953A US 2727804 A US2727804 A US 2727804A
- Authority
- US
- United States
- Prior art keywords
- bleaching
- hypochlorite
- materials
- textile materials
- solution
- 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
Links
- 238000004061 bleaching Methods 0.000 title claims description 25
- 239000004952 Polyamide Substances 0.000 title claims description 17
- 229920002647 polyamide Polymers 0.000 title claims description 17
- 239000000463 material Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 19
- 239000004753 textile Substances 0.000 claims description 19
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 31
- 239000000243 solution Substances 0.000 description 25
- 239000000460 chlorine Substances 0.000 description 13
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 12
- 229910052801 chlorine Inorganic materials 0.000 description 12
- 239000007864 aqueous solution Substances 0.000 description 10
- 239000000835 fiber Substances 0.000 description 9
- 150000001875 compounds Chemical class 0.000 description 8
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 7
- 229920001778 nylon Polymers 0.000 description 7
- 239000004677 Nylon Substances 0.000 description 6
- -1 alkali metal hypochlorite Chemical class 0.000 description 6
- 239000004744 fabric Substances 0.000 description 6
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 6
- 229910052783 alkali metal Inorganic materials 0.000 description 5
- 229910001919 chlorite Inorganic materials 0.000 description 5
- 229910052619 chlorite group Inorganic materials 0.000 description 5
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 5
- 239000007844 bleaching agent Substances 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- GRWZHXKQBITJKP-UHFFFAOYSA-N dithionous acid Chemical class OS(=O)S(O)=O GRWZHXKQBITJKP-UHFFFAOYSA-N 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 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
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- 229910004878 Na2S2O4 Inorganic materials 0.000 description 1
- 229910019093 NaOCl Inorganic materials 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 125000005521 carbonamide group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019256 formaldehyde Nutrition 0.000 description 1
- 229960004279 formaldehyde Drugs 0.000 description 1
- QGKLCGVVGGFZBS-UHFFFAOYSA-N formaldehyde;zinc Chemical compound [Zn].O=C QGKLCGVVGGFZBS-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- SATVIFGJTRRDQU-UHFFFAOYSA-N potassium hypochlorite Chemical compound [K+].Cl[O-] SATVIFGJTRRDQU-UHFFFAOYSA-N 0.000 description 1
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 1
- 229960002218 sodium chlorite Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/30—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using reducing agents
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
- D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
- D06L4/23—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using hypohalogenites
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/70—Multi-step processes
Definitions
- This invention relates to the bleaching of textile materials made of synthetic linear polyamides of the nylon type.
- synthetic linear polyamides are those described in U. S. patents such as Nos. 2,071,250, 2,071,253, 2,130,948 and 2,359,877. These synthetic linear polyamides are characterized by the presence of repeating carbonamide units having the structural formula
- One of the principal objects of the present invention is to provide a new and improved method for bleaching textile materials of the kind indicated, either in the form of artificial threads or fibers or in the form of fabrics knit or woven from such threads or fibers, in such manner as to bleach them without impairing the strength of the fibers in any way.
- a further object of the invention is to provide a method for successfully bleaching polyamide materials of the foregoing nature with hypochlorite solutions while avoiding previously known disadvantages attendant upon the use of hypochlorite solutions for the purpose indicated.
- the antecedent bleaching operation may be performed in different ways and also at widely differing pH values.
- the bleaching may be performed at room temperature with a hypochlorite solution containing 0.5 g./l. of active chlorine at a pH of either 8-10 or 3-4, and over a period that may vary from 15 minutes to 2 hours.
- an aftertreatment with a hydrosulfite solution for example, 1 g./l. of Na2S2O4
- a time of treatment of five minutes is generally sufiicient, but this may be extended for example to 30 minutes, if desired.
- the bleaching agent may be employed in the form of calcium hypochlorite solutions or alkali metal hypochlorite solutions such as sodium or potassium hypochlorite solutions, and the reducing agents may be employed in the form of their alkali metal salt solutions such as sodium or potassium salt solutions or, in the case of the hydrosulfite, solutions of the addition compounds referred to above.
- a method for the bleaching of textile materials comprising a synthetic linear polyamide comprising treating such materials with a hypochlorite, and then with a reducing agent at a temperature above 80 C.
- a method for the bleaching of textile materials comprising a synthetic linear polyamide comprising treating such materials with a solution yielding hypochlorite ions, and then with a solution of a reducing agent at a temperature higher than 80 C.
- a method for the bleaching of textile materials comprising a synthetic linear polyamide comprising bleaching such materials with an aqueous solution of a hypochlorite selected from the class consisting of calcium and alkali metal hypochlorites, and then with an aqueous solution of a reducing agent at a temperature of about 90-95 C.
- a hypochlorite selected from the class consisting of calcium and alkali metal hypochlorites
- a method for the bleaching of textile materials comprising a synthetic linear polyamide comprising treating such materials with an aqueous solution yielding hypochlorite ions, rinsing the textile materials in order to remove most of the hypochlorite solution, and thereafter removing residual chlorine from said textile materials by treating same with an aqueous solution of a compound selected from the class consisting of hydrosulfites and addition compounds of hydrosulfites at a temperature above C.
- a method for the bleaching of textile materials comprising a synthetic linear polyamide comprising treating such materials with an aqueous solution of a hypochlorite selected from the class consisting of calcium and alkali metal hypochlorites, rinsing the textile materials in order to remove most of the hypochlorite solution, and thereafter removing residual chlorine from said textile materials by treating same with an aqueous solution of a compound selected from the class consisting of hydrosulfites and addition compounds of hydrosulfites at a temperature of approximately -95 C.
- a hypochlorite selected from the class consisting of calcium and alkali metal hypochlorites
- a method for the bleaching of textile materials comprising a synthetic linear polyamide comprising treating such materials with an aqueous solution of a hypochlorite selected from the class consisting of calcium and alkali metal hypochlorites, rinsing the textile materials in order to remove most of the hypochlorite solution, and thereafter removing residual chlorine from said textile materials by treating same with an aqueous solution of sodium hydrosulfite at a temperature of approximately 90-95 C.
- a hypochlorite selected from the class consisting of calcium and alkali metal hypochlorites
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL313160X | 1952-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2727804A true US2727804A (en) | 1955-12-20 |
Family
ID=19783699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US347839A Expired - Lifetime US2727804A (en) | 1952-08-07 | 1953-04-09 | Bleaching of polyamides |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2727804A (en(2012)) |
| BE (1) | BE513498A (en(2012)) |
| CH (1) | CH313160A (en(2012)) |
| FR (1) | FR1070701A (en(2012)) |
| GB (1) | GB725953A (en(2012)) |
| NL (2) | NL75077C (en(2012)) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2830868A (en) * | 1955-09-27 | 1958-04-15 | Clorox Co | Method for restoring whiteness to yellowed nylon fabrics |
| US3900284A (en) * | 1973-06-21 | 1975-08-19 | Basf Wyandotte Corp | Process for the removal of silver nitrate stains |
| US4603178A (en) * | 1984-11-01 | 1986-07-29 | Armstrong World Industries, Inc. | Differential acid dyeing of polyamide reacted with N-halogenating agent |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2260367A (en) * | 1939-06-23 | 1941-10-28 | Mathieson Alkali Works Inc | Treatment of substantially solid resinous linear condensation polymers |
| GB682975A (en) * | 1950-03-03 | 1952-11-19 | British Nylon Spinners Ltd | Improvements relating to the colouration of textiles |
-
0
- NL NLAANVRAGE7207083,A patent/NL171684C/xx active
- NL NL75077D patent/NL75077C/xx active
- BE BE513498D patent/BE513498A/xx unknown
-
1953
- 1953-02-09 FR FR1070701D patent/FR1070701A/fr not_active Expired
- 1953-02-10 GB GB3768/53A patent/GB725953A/en not_active Expired
- 1953-02-10 CH CH313160D patent/CH313160A/de unknown
- 1953-04-09 US US347839A patent/US2727804A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2260367A (en) * | 1939-06-23 | 1941-10-28 | Mathieson Alkali Works Inc | Treatment of substantially solid resinous linear condensation polymers |
| GB682975A (en) * | 1950-03-03 | 1952-11-19 | British Nylon Spinners Ltd | Improvements relating to the colouration of textiles |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2830868A (en) * | 1955-09-27 | 1958-04-15 | Clorox Co | Method for restoring whiteness to yellowed nylon fabrics |
| US3900284A (en) * | 1973-06-21 | 1975-08-19 | Basf Wyandotte Corp | Process for the removal of silver nitrate stains |
| US4603178A (en) * | 1984-11-01 | 1986-07-29 | Armstrong World Industries, Inc. | Differential acid dyeing of polyamide reacted with N-halogenating agent |
Also Published As
| Publication number | Publication date |
|---|---|
| GB725953A (en) | 1955-03-16 |
| BE513498A (en(2012)) | |
| FR1070701A (fr) | 1954-08-10 |
| NL171684C (nl) | |
| NL75077C (en(2012)) | |
| CH313160A (de) | 1956-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3318657A (en) | Method of bleaching cellulose fibres | |
| US2178696A (en) | Material treatment | |
| US4195974A (en) | Desizing and bleaching of textile goods | |
| EP0175272B1 (de) | Verfahren zum einbadigen reduktiven und oxidativen Bleichen von Wolle | |
| US2173474A (en) | Bleaching | |
| CA1133660A (en) | Process for the preparation of cellulose fibres from pine | |
| US2727804A (en) | Bleaching of polyamides | |
| US2265033A (en) | Method of purifying textile materials | |
| US3144300A (en) | Treatment of keratinous fibers | |
| DE900807C (de) | Verfahren und Mittel zur Herabsetzung der Schrumpfneigung von ganz oder teilweise aus Wolle bestehenden Geweben oder Faserstoffen | |
| US3720661A (en) | Process for producing acetylated regenerated cellulose articles | |
| US4236891A (en) | Process for textile bleaching with dibasic magnesium hypochlorite | |
| US2903327A (en) | Naoci-h2o2 cotton cloth bleaching | |
| US2140863A (en) | Process for producing a pure white cellulose | |
| GB652594A (en) | Improvements in and relating to the production of viscose rayon threads | |
| US2701178A (en) | Permonosulfuric acid treatment of wool, for shrink resistance | |
| US1908481A (en) | Method of bleaching fibers | |
| US5066306A (en) | Process for removing permanganate stains from articles | |
| DE912564C (de) | Verfahren zum Bleichen und gegebenenfalls Reinigen von Cellulose-Textilmaterialien | |
| US2202331A (en) | Treatment of textiles | |
| US2185210A (en) | Chemical manufacture | |
| US3413078A (en) | Bleaching of synthetic fibers,alone or mixed with natural and/or artificial cellulose fibers | |
| US2383900A (en) | Treatment of cellulosic textile materials | |
| US1931245A (en) | Process of treating artificial thread | |
| US2590390A (en) | Treatment of wool with nu-chlorine compounds |