WO2007128715A1 - Process for improved and controlled dyeability of polyamide-6 fibers - Google Patents
Process for improved and controlled dyeability of polyamide-6 fibers Download PDFInfo
- Publication number
- WO2007128715A1 WO2007128715A1 PCT/EP2007/054169 EP2007054169W WO2007128715A1 WO 2007128715 A1 WO2007128715 A1 WO 2007128715A1 EP 2007054169 W EP2007054169 W EP 2007054169W WO 2007128715 A1 WO2007128715 A1 WO 2007128715A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polyamide
- fibers
- dyeability
- content
- weight
- 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.)
- Ceased
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/24—Polyamides; Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
- C08G69/16—Preparatory processes
- C08G69/18—Anionic polymerisation
- C08G69/20—Anionic polymerisation characterised by the catalysts used
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
Definitions
- the invention relates to a process for controlling and improving the dyeability and the dyeing process of polyamide-6 fibers.
- the process allows to adjust and to control the content of carboxylic end groups (CEG content) and therefore allows a better control of polyamide-6 fibers dyeability.
- CEG content carboxylic end groups
- Polyamide-6 is also called nylon 6.
- Polyamide-6 fibers or filaments are commonly produced in a two step process, spinning and drawing. After drawing the fibers are dyed.
- Dyeability depends on various factors, like pH and temperature of the dyeing process, but also on the content of amino end groups (AEG content) in the polyamide-6 resin.
- JP-A-48103821 discloses a process for preparing polyamide fibers with improved dyeability by addition of polyalkylene glycol or its derivative during melt spinning to give fibers with improved dyeability.
- DE-A- 1241984 discloses the preparation of polyesteramides based on hexacarbon dicarboxylic acids with a maximum of 22 C atoms, a dihydroxycompound of cyclohexane or a glycol mixture consisting of at least 50 % of a dihydroxycompound of cyclohexane and an amine group containing compound, being used for manufacture of articles with improved properties (e.g. better resorption of humidity and better dyeability).
- Subject of the invention is a process for controlling the dyeability of polyamide-6 fibers made of polyamide-6 resin, by adjusting the ratio of amino end groups (AEG) content to carboxylic end groups (CEG) content in the polyamide-6 resin; this ratio being adjusted by the presence of a compound of formula (I) and of a compound of formula (II)
- the polymerization is carried out in the presence of from 0.01 to 1.0 % by weight, more preferably of from 0.02 to 0.6 % by weight, based on the weight of the polyamide-6 resin, of the compound of formula (I).
- the polymerization is carried out in the presence of from 0.01 to 1.0 % by weight, more preferably of from 0.02 to 0.7 % by weight, even more preferably of from 0.05 to 0.5% by weight, based on the weight of the polyamide-6 resin, of the compound of formula (II).
- the ratio of AEG content to CEG content can be adjusted in a wide range, preferably of from 0.20 to 1.00, more preferably of from 0.35 to 0.80, even more preferably of from 0.50 to 0.75.
- the batch manufacture of polyamide-6 is carried out using epsilon-capro lactam which is charged with up to 10 % water into a pressure vessel. Only capro lactam is the reactant (monomer). Dry capro lactam will not polymerize, but, in the presence of water the reaction occurs at reasonable rates above temperatures of 200 0 C. Actually several reactions occur; the addition reaction is the major growth mechanism.
- the process is expedited by adding aminocaproic acid at the start. Furthermore adjusting the acidity of the initial charge in such a way that the pH of a 20 % by weight solution is 5.7, leads to a fast, smooth polymerization.
- Polyamide-6 usually contains about 10 % by weight of extractable material which acts as plasticizer and is preferably removed for most applications. Such material consists mostly of oligomeric (cyclic) caprolactame.
- the step to remove low molecular weight compounds is accomplished by applying a vacuum or by deionized water washing of the crude polymer which must afterwards carefully be dried.
- the polyamide-6 resins can contain further commonly used additives such as stabilizers, waxes, flame retardants and pigments. These additives are preferably added after polymerization to the polymer resin. It was unexpected that the dyeability of polyamide-6 fibers can be controlled by the ratio of AEG content to CEG content, the AEG content to CEG content themselves being effectively controlled by the addition of the compounds of formula (I) and (II) to the polymerization reaction.
- the process allows the dyeing of polyamide-6 fibers at lower temperatures. It provides polyamide-6 fibers with improved dyeing characteristics like colour strength. It is possible to achieve the same results with respect to colour strength or hue, at a reduced dyeing temperature and with a significant reduction of the process time. Therefore costs of dyeing can be reduced.
- each formulation of polymer 1 to 3 contains furthermore 0.1 % of compound of formula (II)
- FC fraycounts
- FB single filament breakages
- YB yarn breakages
- WUS wind-up speed
- FDY and POY POY were drawn on as Erdmann 4-godets (textile) drawing frame at drawing ratios varying from 1.1 to 1.4 under elongation of 40 %.
- FDY bobbins were prepared for further evaluation by means of dyeing (see below).
- the fibers have been winded with a winding apparatus Type Barmag SW46 at varying winding speeds (4200 - 4800 - 5400m/min).
- a solution was prepared with 0.5 % w/w of Nylosan ® Yellow E-GRL 160 (CI Acid Yellow 19; 0.5g of dye for 100 g of fibers) and 0.3 % w/w of Nylosan ® Blue E-2GL 200 (CI Acid Blue 40) in distilled water.
- the liquor ratio was 40:1 (40 ml of dye solution for 1 g of fiber).
- the pH was controlled and adjusted to a pH of 8.0 +/- 0.2 (with sodium dihydrogenephosphate 2 hydrate and di-Sodium hydrogenophosphate 1,2 hydrate). Afterwards the knitted fiber of 1 g was added into the solution. Finally the flask was closed and put into the dyeing machine.
- the colour strength of Polymer No 1 was set to 100.0 %.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Polyamides (AREA)
Abstract
The invention relates to a process for controlling and improving the dyeability and the dyeing process of polyamide-6 fibers. The process allows to adjust and to control the content of carboxylic end groups (CEG content) and therefore allows a better control of polyamide-6 fibers dyeability.
Description
PROCESS FOR IMPROVED AND CONTROLLED DYEABILITY OF
POLYAMIDE-6 FIBERS
The invention relates to a process for controlling and improving the dyeability and the dyeing process of polyamide-6 fibers. The process allows to adjust and to control the content of carboxylic end groups (CEG content) and therefore allows a better control of polyamide-6 fibers dyeability.
Polyamide-6 is also called nylon 6. Polyamide-6 fibers or filaments are commonly produced in a two step process, spinning and drawing. After drawing the fibers are dyed.
Parameters like dyeability and homogeneity of dyeing of polyamide-6 fibers are important factors for the resulting quality of the fibers. Therefore, any improvement of related processes already during or after polyamide-6 manufacture is appreciated.
Dyeability depends on various factors, like pH and temperature of the dyeing process, but also on the content of amino end groups (AEG content) in the polyamide-6 resin.
A common way of increasing colour deepness in terms of increasing colour intensity - as perceived by the human eye - was until now done by increasing the AEG content.
However, the dyeability and the homogeneity of dyeing is more complicated and still needs improvement. Also high demands have to be met concerning colour strength, purity of hue and light fastness.
JP-A-48103821 discloses a process for preparing polyamide fibers with improved dyeability by addition of polyalkylene glycol or its derivative during melt spinning to give fibers with improved dyeability.
US-A-2901466 reveals the preparation of polyesters and polyesteramides from
1 ,4-cyclohexane-dimethanol with one or more esters of organic acids or organic amines respectively.
DE-A- 1241984 discloses the preparation of polyesteramides based on hexacarbon dicarboxylic acids with a maximum of 22 C atoms, a dihydroxycompound of cyclohexane or a glycol mixture consisting of at least 50 % of a dihydroxycompound of cyclohexane and an amine group containing compound, being used for manufacture of articles with improved properties (e.g. better resorption of humidity and better dyeability).
The known processes for dyeing polyamide-6 fibers still show deficiencies with regard to the demands claimed by today's applications. Therefore there was a need to improve the dyeability of polyamide-6 fibers. Surprisingly it was found that the ratio of the content of amino end groups (AEG content) to the content of carboxylic end groups (CEG content) in the polyamide-6 fibers is an important factor for controlling the dyeability of the polyamide-6 fibers, and that this ratio can effectively be controlled by the presence of certain substances during the polymerization of epsilon-caprolactam.
Subject of the invention is a process for controlling the dyeability of polyamide-6 fibers made of polyamide-6 resin, by adjusting the ratio of amino end groups (AEG) content to carboxylic end groups (CEG) content in the polyamide-6 resin; this ratio being adjusted by the presence of a compound of formula (I) and of a compound of formula (II)
Preferably the polymerization is carried out in the presence of from 0.01 to 1.0 % by weight, more preferably of from 0.02 to 0.7 % by weight, even more preferably of from 0.05 to 0.5% by weight, based on the weight of the polyamide-6 resin, of the compound of formula (II).
The ratio of AEG content to CEG content can be adjusted in a wide range, preferably of from 0.20 to 1.00, more preferably of from 0.35 to 0.80, even more preferably of from 0.50 to 0.75.
The batch manufacture of polyamide-6 is carried out using epsilon-capro lactam which is charged with up to 10 % water into a pressure vessel. Only capro lactam is the reactant (monomer). Dry capro lactam will not polymerize, but, in the presence of water the reaction occurs at reasonable rates above temperatures of 2000C. Actually several reactions occur; the addition reaction is the major growth mechanism.
Because of the importance of the addition reaction the process is expedited by adding aminocaproic acid at the start. Furthermore adjusting the acidity of the initial charge in such a way that the pH of a 20 % by weight solution is 5.7, leads to a fast, smooth polymerization.
Polyamide-6 usually contains about 10 % by weight of extractable material which acts as plasticizer and is preferably removed for most applications. Such material consists mostly of oligomeric (cyclic) caprolactame. The step to remove low molecular weight compounds is accomplished by applying a vacuum or by deionized water washing of the crude polymer which must afterwards carefully be dried.
The polyamide-6 resins can contain further commonly used additives such as stabilizers, waxes, flame retardants and pigments. These additives are preferably added after polymerization to the polymer resin.
It was unexpected that the dyeability of polyamide-6 fibers can be controlled by the ratio of AEG content to CEG content, the AEG content to CEG content themselves being effectively controlled by the addition of the compounds of formula (I) and (II) to the polymerization reaction. The process allows the dyeing of polyamide-6 fibers at lower temperatures. It provides polyamide-6 fibers with improved dyeing characteristics like colour strength. It is possible to achieve the same results with respect to colour strength or hue, at a reduced dyeing temperature and with a significant reduction of the process time. Therefore costs of dyeing can be reduced.
Examples
Definition of the test methods
AEG content: see J.E. Waltz, G.B. Taylor; Anal. Chem. 19, 448-450 (1947)
CEG content: see J.E. Waltz, G.B. Taylor; Anal. Chem. 19, 448-450
(1947) and: W. Schefer; Textil-Rundschau 10 (6), 279 (1955)
FB: according to DIN EN ISO 5079 YB: according to ASTM D 1578 (D2256)
Tenacity: according to DIN 53455
Elongation at Break: according to DIN 53455
E-Modulus: according to DIN 53457
Colour values of table 3 : determined according to DIN 6167 Yarn titer: [dtex] is the weight of a single filament in grams with a length of 10.000 meters
Direct polymerization of polyamide-6 resins with different AEG/CEG-content by polymerization in the presence of compound of formula (II) with and without 1,4- cyclohexane-dimethanol (1,4-CHDM) (compound of to formula (I))
Details of the polymerization procedure are found in: Illing, G.; Kunststoffe, 79 (10), 967-72 (1989).
A series of test polymers with constant AEG content but different CEG has been prepared.
Direct polymerization of capro lactam took place in which unpolymerized caprolactam was removed by vacuum. Low molecular weight volatile compounds and the excess of the monomer were removed directly by the vacuum process. Since increasing monomer content in polyamide-6 increased the impact toughness and the strength at break but decreased the E-modulus, these properties could be controlled by the direct polymerization method since the monomer content in the resulting polymer could be
controlled. Via the catalyst concentration and regulation of reaction conditions, the molecular weight and the viscosity could be regulated using such direct polymerization method. The compound of formula (I) has been added to the polymerization in a final stage after applying the vacuum process.
The individual formulations prepared accordingly are presented in table 1. All units in "%" mean "% by weight based on the weight of the polyamide-6 resin" if not otherwise stated.
(*) each formulation of polymer 1 to 3 contains furthermore 0.1 % of compound of formula (II)
Several polymers with nearly constant AEG content (45 +/- 2 meq/kg) but different CEG contents (ranging from about 66 to about 80 meq/kg) were prepared. These products have been used for further meltspinning experiments for the determination of other yarn properties such as Partially Oriented Yarn (POY), Fully Drawn Yarn (FDY) and dyeability (see below).
Results of melt spinning experiments and yarn testing
Spinning of the polymer samples took place at a velocity of 4200m/min.Differences in spinning performance were observed at higher spinning speeds, but these differences were assigned to differences in polymer recipes.
Prior to melt spinning polymers were subjected to dyeing.
Melt spinning took place in a double screw extruder at 270 0C at a process pressure of 100 +/- 3bar. The outlet of the fibers after the extruder dye was supported by applying an air stream at a temperature of 19 +/- 2 0C, a relative humidity of 85 % by weight and a velocity of 0.2 +/- 0.02 m/s. A spinfinish of type Fasavin 2733 at a concentration of 15 +/- 0.5 % was used.
The spinability characteristics have been studied by monitoring the numbers of fraycounts (FC), single filament breakages (FB) and yarn breakages (YB) as a function of wind-up speed (WUS) at constant throughput. The empirical spinability index S was calculated using the equation S = 0.1 * FC + FB +10 * YB Yarn titers varied from 74f24 at 4200 m/min. to 52f24 at 5400 m/min.
Drawing of FDY and POY POY were drawn on as Erdmann 4-godets (textile) drawing frame at drawing ratios varying from 1.1 to 1.4 under elongation of 40 %. FDY bobbins were prepared for further evaluation by means of dyeing (see below).
The fibers have been winded with a winding apparatus Type Barmag SW46 at varying winding speeds (4200 - 4800 - 5400m/min).
The different fiber samples have been characterized by means of mechanical tests (tenacity, elongation at break, E-modulus); moreover filament and yarn breaks have been counted. Results are shown in table 2.
Example for the dyeability of these polyamide-6 fibers:
This test determines the affinity of the fibers with 2 dyes, a more acidic blue dye and a less acidic yellow dye. It was known to be related to the AEG content of the fibers.
The polymers of table 1 have been used.
In a standard flask of the dyeing machine (Polymat AHIBA), a solution was prepared with 0.5 % w/w of Nylosan® Yellow E-GRL 160 (CI Acid Yellow 19; 0.5g of dye for 100 g of fibers) and 0.3 % w/w of Nylosan® Blue E-2GL 200 (CI Acid Blue 40) in distilled water. The liquor ratio was 40:1 (40 ml of dye solution for 1 g of fiber). The pH was controlled and adjusted to a pH of 8.0 +/- 0.2 (with sodium dihydrogenephosphate 2 hydrate and di-Sodium hydrogenophosphate 1,2 hydrate). Afterwards the knitted fiber of 1 g was added into the solution. Finally the flask was closed and put into the dyeing machine.
The ramp temperature program: 10 minutes at 400C 40-980C (l°C/min) 30 minutes at 98°C
At the end of the dyeing process, the dyed fibers were removed from the solution, washed with some distilled water and dried in an oven at 500C. Colour values are given in Table 3.
Table 3: Colour measurements of the dyed knitted polyamide-6 fibers
The colour strength of Polymer No 1 was set to 100.0 %.
Claims
1. Process for controlling the dyeability of polyamide-6 fibers made of polyamide- 6 resin, by adjusting the ratio of amino end groups (AEG) content to carboxylic end groups (CEG) content in the polyamide-6 resin; this ratio being adjusted by the presence of a compound of formula (I) and of a compound of formula (II)
2. Process according to claim 1, wherein the polymerization is carried out in the presence of from 0.01 to 1.0 % by weight, based on the weight of the polyamide-6 resin, of the compound of formula (I).
3. Process according to claim 1 or 2, wherein the polymerization is carried out in the presence of from 0.01 to 1.0 % by weight, based on the weight of the polyamide-6 resin, of the compound of formula (II).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06290731.6 | 2006-05-04 | ||
| EP06290731 | 2006-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007128715A1 true WO2007128715A1 (en) | 2007-11-15 |
Family
ID=37036932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2007/054169 Ceased WO2007128715A1 (en) | 2006-05-04 | 2007-04-27 | Process for improved and controlled dyeability of polyamide-6 fibers |
Country Status (2)
| Country | Link |
|---|---|
| TW (1) | TW200804646A (en) |
| WO (1) | WO2007128715A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3263639A1 (en) | 2016-06-27 | 2018-01-03 | Clariant International Ltd | Use of an additive composition for the preparation of polycondensation polymers |
| CN108368645A (en) * | 2015-12-23 | 2018-08-03 | 艾德凡斯化学公司 | Bi-end-blocking polyamide for high speed spinning application |
| CN109943067A (en) * | 2019-03-28 | 2019-06-28 | 江苏晋伦塑料科技有限公司 | A kind of pure hydrolysis daiamid composition and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663172B (en) * | 2020-12-23 | 2023-01-10 | 常州灵达特种纤维有限公司 | High-performance polyester-polyamide blend fiber and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2901466A (en) * | 1955-12-22 | 1959-08-25 | Eastman Kodak Co | Linear polyesters and polyester-amides from 1,4-cyclohexanedimethanol |
| JPS48103821A (en) * | 1972-04-10 | 1973-12-26 | ||
| EP0373873A2 (en) * | 1988-12-12 | 1990-06-20 | Du Pont Canada Inc. | Process and apparatus for modifying polyamide dyeability or amine end content |
| DE3932912A1 (en) * | 1989-10-03 | 1991-04-11 | Sandoz Ag | Synthetic polyamide(s) for plastics, inks and lacquers |
| US5487856A (en) * | 1993-08-16 | 1996-01-30 | Basf Corporation | Process for the manufacture of a post-heat set dyed fabric of polyamide fibers having improved dye washfastness and heat stability |
-
2007
- 2007-04-27 WO PCT/EP2007/054169 patent/WO2007128715A1/en not_active Ceased
- 2007-05-02 TW TW096115588A patent/TW200804646A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2901466A (en) * | 1955-12-22 | 1959-08-25 | Eastman Kodak Co | Linear polyesters and polyester-amides from 1,4-cyclohexanedimethanol |
| DE1241984B (en) * | 1955-12-22 | 1967-06-08 | Eastman Kodak Co | Process for making polyester amides |
| JPS48103821A (en) * | 1972-04-10 | 1973-12-26 | ||
| EP0373873A2 (en) * | 1988-12-12 | 1990-06-20 | Du Pont Canada Inc. | Process and apparatus for modifying polyamide dyeability or amine end content |
| DE3932912A1 (en) * | 1989-10-03 | 1991-04-11 | Sandoz Ag | Synthetic polyamide(s) for plastics, inks and lacquers |
| US5487856A (en) * | 1993-08-16 | 1996-01-30 | Basf Corporation | Process for the manufacture of a post-heat set dyed fabric of polyamide fibers having improved dye washfastness and heat stability |
Non-Patent Citations (1)
| Title |
|---|
| DATABASE WPI Week 197432, Derwent World Patents Index; AN 1974-57431V, XP002402650 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108368645A (en) * | 2015-12-23 | 2018-08-03 | 艾德凡斯化学公司 | Bi-end-blocking polyamide for high speed spinning application |
| JP2018538460A (en) * | 2015-12-23 | 2018-12-27 | アドバンシックス・レジンズ・アンド・ケミカルズ・リミテッド・ライアビリティ・カンパニーＡｄｖａｎｓｉｘ Ｒｅｓｉｎｓ ＆ Ｃｈｅｍｉｃａｌｓ Ｌｌｃ | Double-ended polyamide for high speed spinning applications |
| EP3394330A4 (en) * | 2015-12-23 | 2019-07-24 | AdvanSix Resins & Chemicals LLC | DOUBLE-TERMINATED POLYAMIDE FOR HIGH SPEED WIRE APPLICATION |
| US10494740B2 (en) | 2015-12-23 | 2019-12-03 | Advansix Resins & Chemicals Llc | Dual-terminated polyamide for high speed spinning application |
| CN108368645B (en) * | 2015-12-23 | 2021-02-09 | 艾德凡斯化学公司 | Double-end-capped polyamides for high-speed spinning applications |
| EP3263639A1 (en) | 2016-06-27 | 2018-01-03 | Clariant International Ltd | Use of an additive composition for the preparation of polycondensation polymers |
| WO2018001704A1 (en) | 2016-06-27 | 2018-01-04 | Clariant International Ltd | Use of an additive composition for the preparation of polycondensation polymers |
| US10920069B2 (en) | 2016-06-27 | 2021-02-16 | Clariant Plastics & Coatings Ltd | Use of an additive composition for the preparation of polycondensation polymers |
| CN109943067A (en) * | 2019-03-28 | 2019-06-28 | 江苏晋伦塑料科技有限公司 | A kind of pure hydrolysis daiamid composition and preparation method thereof |
| CN109943067B (en) * | 2019-03-28 | 2021-07-13 | 江苏晋伦塑料科技有限公司 | Pure hydrolysis-resistant polyamide composition and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200804646A (en) | 2008-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100232977B1 (en) | Inherently light-and heat-stabilized polyamides | |
| JP3887312B2 (en) | Process for the production of stabilized compositions based on polyamide | |
| RU2351621C2 (en) | Lightproof and heat-resistant composition | |
| US5223196A (en) | Processing of pigmented nylon fibers using modified polymers | |
| US20080090945A1 (en) | Polyamide composition with improved heat stability and whiteness | |
| SK6362000A3 (en) | Inherently light- and heat-stabilized polyamide and method of making the same | |
| US6194537B1 (en) | Nylon 6 chip and production of nylon 6 yarn and film and of further industrial articles from nylon 6 | |
| KR20010042014A (en) | Inherently light- and heat-stabilized polyamides with improved wet fastness | |
| CA2249005A1 (en) | Light and thermally stable polyamide | |
| EP1709220B1 (en) | Polyamide composition comprising optical brightener, yarns made therefrom and process for heat setting such yarns | |
| WO2007128715A1 (en) | Process for improved and controlled dyeability of polyamide-6 fibers | |
| CN113260655B (en) | Stain resistant polyamide polymers obtained by highly end-capping | |
| RU2265090C2 (en) | Method for producing of synthetic threads, fibers and filaments based on polyamide | |
| US5238982A (en) | Method for producing polyamide fibers with reduced flammability | |
| US6867266B2 (en) | Light-stabilized polymeric articles and methods of making the same | |
| KR20170120652A (en) | High strength polyamide yarn | |
| Deopura et al. | Nylon 6 and nylon 66 fibres | |
| KR20170119703A (en) | High strength polyamide yarn | |
| KR20020048783A (en) | Process of preparing a polyamide 6 fibre endurable against heat and light |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07728624 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 07728624 Country of ref document: EP Kind code of ref document: A1 |