WO2008032052A1 - Treatment of polyamides - Google Patents
Treatment of polyamides Download PDFInfo
- Publication number
- WO2008032052A1 WO2008032052A1 PCT/GB2007/003442 GB2007003442W WO2008032052A1 WO 2008032052 A1 WO2008032052 A1 WO 2008032052A1 GB 2007003442 W GB2007003442 W GB 2007003442W WO 2008032052 A1 WO2008032052 A1 WO 2008032052A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- silicone
- process according
- polyamide material
- hydroxide
- coated
- Prior art date
Links
Classifications
-
- 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
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- 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
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
- C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
- C09D9/04—Chemical paint or ink removers with surface-active agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B17/0412—Disintegrating plastics, e.g. by milling to large particles, e.g. beads, granules, flakes, slices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0293—Dissolving the materials in gases or liquids
- B29B2017/0296—Dissolving the materials in aqueous alkaline solutions, e.g. NaOH or KOH
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2022/00—Hollow articles
- B29L2022/02—Inflatable articles
- B29L2022/027—Air bags
-
- 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
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Definitions
- This invention relates to the treatment of polyamides, and, in particular, to a process for removal of silicone coatings from polyamides.
- the invention has particular utility in the removal of silicones from airbags made from silicone-coated poly amide textiles.
- a process for recycling polyamide material coated with silicone resin is disclosed in published European Patent Application No. 950684 A2 in the name of F.A. Rueb Holding GmbH.
- the method there proposed involves the treatment of the coated polyamide at elevated temperature, with an alkaline hydroxide at a concentration of 5 to 50% by weight, preferably 10 to 30% by weight, of the alkaline hydroxide. It is indicated that the thermal treatment of the polyamide material can take place in the presence of a tenside.
- a disadvantage of the method proposed in European Patent Publication No. 950684 A2 is that the concentration of the hydroxide is so great as to degrade the polyamide being treated.
- the strength of the alkaline hydroxide solution is such as to shorten the polymer chains to such an extent that the physical properties of the polyamide are degraded, thus producing a recycled product of reduced commercial value.
- US Patent No. 4654041 to Hansa Textil Chemie GmbH discloses a process for removal from textile materials such as cotton fabric, wool/polyacryl knitted fabric, and cotton/polyester corduroy fabrics silicones which have been applied to those materials for the purpose of providing those fabrics with a soft and pliant feel.
- the disclosed process comprises treating the material with an aqueous preparation containing surface active equilibration catalysts for organosiloxanes selected from the group consisting of alkyl or aryl or alkylaryl sulphonic acids, aliphatic alcohols with 3 to 15 carbon atoms, and surface-active quaternary ammonium compounds, said catalysts being present in an amount of 0.2 to 5 weight percent.
- the aqueous preparation may additionally contain an alkali carbonate and may also contain auxiliary solvents for the equilibration catalysts, which may be low molecular weight water- soluble alcohols such as isopropyl alcohol. That invention, however, is not at all concerned with polyamide textiles nor with airbags produced from polyamide textiles and can be thought of merely as a laundering process, taking place in conventional washing machines as commonly used in the textile industry.
- a process for removing silicone from polyamide material which comprises treating silicone-coated polyamide material at an elevated temperature with an aqueous composition containing a surfactant, an alkaline hydroxide at a concentration of less than 2.1 percent hydroxide ion content by weight, and an alcohol miscible at that elevated temperature with the hydroxide solution, under such conditions of temperature and pressure and for such a duration of time as to dissolve the silicone coating but also to produce a lowering of the relative viscosity in formic acid of the polyamide of no more than 25.
- the present invention also extends to polyamide which has been treated by the process of the present invention.
- Suitable temperatures may be selected from the range 90° to 180° Centigrade, e.g. 130° Centigrade.
- the polyamide material is reduced to small pieces since it has been found that the process performs better in such circumstances.
- surfactant may be employed in the process of the present invention; surfactants which have been found to be suitable include cationic or amphoteric surfactants, either used alone or used in combination with non-ionic surfactants.
- Preferred surfactants include quaternary ammonium salts, preferably quaternary ammonium chlorides, such as ditallowdimethylammonium chloride, dimethyldidecyl ammonium chloride (DDAC) as well as alcohol ethoxylates.
- suitable surfactants are those commercially available under the trade marks BEROL 185, ARQUAD 2.10-80, ARQUAD 2T-70 and HANSA SR 142.
- Any suitable alcohol may be used; examples of alcohols which have been found to be satisfactory in the process of the present invention include ethanediol, isopropanol, 2,3- butanediol and 2,5-dimethyl-2,5-hexanediol.
- the alkaline hydroxides which may be used include sodium hydroxide, potassium hydroxide and ammonium hydroxide.
- the proportion of the polyamide material to the aqueous composition is approximately 20: 100 by weight.
- the alkaline hydroxide is used at a concentration of 0.5 to 2.85 percent by weight of the treatment liquor.
- Relative viscosity is determined according to standard test method ASTM D789- 04: 'Determination of Relative Viscosity of Polyamide', and is with respect to 90% formic acid.
- An airbag made of woven nylon-6,6 coated with a silicone was cut up into small pieces and was then treated with an aqueous solution containing 5% by weight of isopropanol and 2% by weight of sodium hydroxide for a period of one hour and at a temperature of 13O 0 C.
- the pieces were then neutralised and washed to remove the treatment solution, and the relative viscosity of the recovered nylon-6,6 measured by the ASTM method referred to above.
- the relative viscosity was found to be 54, whereas the relative viscosity measured by the same method of 'virgin' nylon-6,6 was approximately 60, a drop in relative viscosity of just 6.
- An airbag made of woven nylon-6,6 coated with a silicone was cut up into small pieces and was then treated with an aqueous solution containing 5% by weight of ethylene glycol and 2% by weight of sodium hydroxide for a period of two hours and at a temperature of 130°C.
- the pieces were then neutralised and washed to remove the treatment solution, and the relative viscosity of the recovered nylon-6,6 measured by the ASTM method referred to above.
- the relative viscosity was found to be 51, whereas the relative viscosity measured by the same method of 'virgin' nylon-6,6 was approximately 60, a drop in relative viscosity of just 9.
- An airbag made of woven nylon-6,6 coated with a silicone was cut up into small pieces and was then treated with an aqueous solution containing 4% by weight of ditallowdimethyl ammonium chloride, 2% by weight of sodium hydroxide and 1% by weight of 'Berol 185' (Berol 185 is a non-ionic surfactant based on a synthetic primary alcohol) for a period of one hour and at a temperature of 130°C.
- the pieces were then neutralised and washed to remove the treatment solution, and the relative viscosity of the recovered nylon-6,6 measured by the ASTM method referred to above.
- the relative viscosity was found to be 54, whereas the relative viscosity measured by the same method of 'virgin' nylon-6,6 was approximately 60, a drop in relative viscosity of just 6.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Sustainable Development (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
A process for removing silicone from polyamide material is provided which comprises treating silicone-coated polyamide material at an elevated temperature with an aqueous composition containing a surfactant, an alkaline hydroxide at a concentration of less than 2.1 percent hydroxide ion content by weight, and an alcohol miscible at that elevated temperature with the hydroxide solution, under such conditions of temperature and pressure and for such a duration of time as to dissolve, the silicone coating but also to produce a lowering of the relative viscosity in formic acid of the polyamide of no more than 25. The process is particularly suitable for removal of silicones from airbags made from silicone-coated polyamide textiles.
Description
TREATMENT OF POLYAMIDES
This invention relates to the treatment of polyamides, and, in particular, to a process for removal of silicone coatings from polyamides. The invention has particular utility in the removal of silicones from airbags made from silicone-coated poly amide textiles.
It is becoming common to treat polyamide textile materials with silicone coatings to render those materials air-proof. The use of silicone-coated air-proof polyamide textiles for vehicle airbags is now widespread, and it is desirable to be able to remove the silicone coatings from the polyamide material in order that the polyamide be rendered available for recycling.
A process for recycling polyamide material coated with silicone resin is disclosed in published European Patent Application No. 950684 A2 in the name of F.A. Rueb Holding GmbH. The method there proposed involves the treatment of the coated polyamide at elevated temperature, with an alkaline hydroxide at a concentration of 5 to 50% by weight, preferably 10 to 30% by weight, of the alkaline hydroxide. It is indicated that the thermal treatment of the polyamide material can take place in the presence of a tenside. A disadvantage of the method proposed in European Patent Publication No. 950684 A2 is that the concentration of the hydroxide is so great as to degrade the polyamide being treated. Specifically, the strength of the alkaline hydroxide solution is such as to shorten the polymer chains to such an extent that the physical properties of the polyamide are degraded, thus producing a recycled product of reduced commercial value.
Additionally, US Patent No. 4654041 to Hansa Textil Chemie GmbH discloses a process for removal from textile materials such as cotton fabric, wool/polyacryl knitted fabric, and cotton/polyester corduroy fabrics silicones which have been applied to those materials for the purpose of providing those fabrics with a soft and pliant feel. The disclosed process comprises treating the material with an aqueous preparation containing surface active equilibration catalysts for organosiloxanes selected from the group consisting of alkyl or aryl or alkylaryl sulphonic acids, aliphatic alcohols with 3 to 15 carbon atoms, and surface-active quaternary ammonium compounds, said catalysts being present in an amount of 0.2 to 5 weight percent. The aqueous preparation may additionally contain an alkali carbonate and may also contain auxiliary solvents for the equilibration catalysts, which may be low molecular weight water- soluble alcohols such as isopropyl alcohol. That invention, however, is not at all concerned with polyamide textiles nor with airbags produced from polyamide textiles and can be thought of merely as a laundering process, taking place in conventional washing machines as commonly used in the textile industry.
According to the present invention there is provided a process for removing silicone from polyamide material which comprises treating silicone-coated polyamide material at an elevated temperature with an aqueous composition containing a surfactant, an alkaline hydroxide at a concentration of less than 2.1 percent hydroxide ion content by weight, and an alcohol miscible at that elevated temperature with the hydroxide solution, under such conditions of temperature and pressure and for such a duration of time as to dissolve the silicone coating but also to produce a lowering of the relative viscosity in formic acid of the polyamide of no more than 25.
The present invention also extends to polyamide which has been treated by the process of the present invention.
The combination of temperature, pressure and period of contact of the silicone-coated polyamide material with the treatment solution is chosen to achieve efficient dissolution of the silicone coating with minimum degradation of the quality of the polyamide material as defined by the lowering of its relative viscosity (a measure of the degree of polymer chain shortening to which the polyamide material has been subjected). Suitable temperatures may be selected from the range 90° to 180° Centigrade, e.g. 130° Centigrade.
Preferably the polyamide material is reduced to small pieces since it has been found that the process performs better in such circumstances.
Any suitable surfactant may be employed in the process of the present invention; surfactants which have been found to be suitable include cationic or amphoteric surfactants, either used alone or used in combination with non-ionic surfactants. Preferred surfactants include quaternary ammonium salts, preferably quaternary ammonium chlorides, such as ditallowdimethylammonium chloride, dimethyldidecyl ammonium chloride (DDAC) as well as alcohol ethoxylates. Specific examples of suitable surfactants are those commercially available under the trade marks BEROL 185, ARQUAD 2.10-80, ARQUAD 2T-70 and HANSA SR 142.
Any suitable alcohol may be used; examples of alcohols which have been found to be satisfactory in the process of the present invention include ethanediol, isopropanol, 2,3- butanediol and 2,5-dimethyl-2,5-hexanediol.
The alkaline hydroxides which may be used include sodium hydroxide, potassium hydroxide and ammonium hydroxide.
Preferably the proportion of the polyamide material to the aqueous composition is approximately 20: 100 by weight. Preferably the alkaline hydroxide is used at a concentration of 0.5 to 2.85 percent by weight of the treatment liquor.
Although the invention is applicable to polyamide materials in general, the remainder of the specification will concentrate particularly on nylon-6,6 and upon nylon-6, and, in particular, upon the process of treating airbags made from nylon textiles coated with silicone, in order to retrieve high-quality nylon.
Reference has been made hereinbefore to determining the degradation in quality of the nylon by determination of its relative viscosity after being subjected to the process of the present invention. Relative viscosity is determined according to standard test method ASTM D789- 04: 'Determination of Relative Viscosity of Polyamide', and is with respect to 90% formic acid.
We now set out by way of example only, embodiments of the process of the present invention. In each example the airbag pieces were present in the solution in an amount of approximately 2.25g per lOOg of solution.
Example 1
An airbag made of woven nylon-6,6 coated with a silicone was cut up into small pieces and was then treated with an aqueous solution containing 5% by weight of isopropanol and 2% by weight of sodium hydroxide for a period of one hour and at a temperature of 13O0C. The pieces were then neutralised and washed to remove the treatment solution, and the relative viscosity of the recovered nylon-6,6 measured by the ASTM method referred to above. The relative viscosity was found to be 54, whereas the relative viscosity measured by the same method of 'virgin' nylon-6,6 was approximately 60, a drop in relative viscosity of just 6.
Example 2
An airbag made of woven nylon-6,6 coated with a silicone was cut up into small pieces and was then treated with an aqueous solution containing 5% by weight of ethylene glycol and 2% by weight of sodium hydroxide for a period of two hours and at a temperature of 130°C. The pieces were then neutralised and washed to remove the treatment solution, and the relative viscosity of the recovered nylon-6,6 measured by the ASTM method referred to above. The relative viscosity was found to be 51, whereas the relative viscosity measured by the same method of 'virgin' nylon-6,6 was approximately 60, a drop in relative viscosity of just 9.
Example 3
An airbag made of woven nylon-6,6 coated with a silicone was cut up into small pieces and was then treated with an aqueous solution containing 4% by weight of ditallowdimethyl ammonium chloride, 2% by weight of sodium hydroxide and 1% by weight of 'Berol 185' (Berol 185 is a non-ionic surfactant based on a synthetic primary alcohol) for a period of one hour and at a temperature of 130°C. The pieces were then neutralised and washed to remove the treatment solution, and the relative viscosity of the recovered nylon-6,6 measured by the
ASTM method referred to above. The relative viscosity was found to be 54, whereas the relative viscosity measured by the same method of 'virgin' nylon-6,6 was approximately 60, a drop in relative viscosity of just 6.
It will be appreciated that the invention may be performed otherwise than as particularly described hereinbefore and the present invention includes within its scope all modifications and variations which would be apparent to one skilled in the art.
Claims
1. A process for removing silicone from polyamide material which comprises treating silicone-coated polyamide material at an elevated temperature with an aqueous composition containing a surfactant, an alkaline hydroxide at a concentration of less than 2.1 percent hydroxide ion content by weight, and an alcohol miscible at that elevated temperature with the hydroxide solution, under such conditions of temperature and pressure and for such a duration of time as to dissolve the silicone coating but also to produce a lowering of the relative viscosity in formic acid of the polyamide of no more than 25.
2. A process according to claim 1 wherein the polyamide material is nylon-6,6 or nylon-6.
3. A process according to claim 1 or claim 2 wherein the silicone-coated polyamide material is a nylon textile coated with silicone.
4. A process according to claim 3 wherein the silicone-coated polyamide material is an airbag made from silicone-coated nylon textile.
5. A process according to any one of the preceding claims wherein the silicone-coated polyamide material is reduced to small pieces before the treatment.
6. A process according to any one of the preceding claims wherein the elevated temperature is a temperature selected from the range 90° to 180° Centigrade.
7. A process according to any one of the preceding claims wherein the surfactant is selected from cationic and amphoteric surfactants, either used alone or used in combination with non-ionic surfactants.
8. A process according to claim 7 wherein the surfactant is selected from quaternary ammonium salts and alcohol ethoxylates.
9. A process according to claim 8 wherein the surfactant is a quaternary ammonium salt selected from ditallowdimethylammonium chloride and dimethyldidecyl ammonium chloride (DDAC).
10. A process according to any one of the preceding claims wherein the alkaline hydroxide is selected from sodium hydroxide, potassium hydroxide and ammonium hydroxide.
11. A process according to any one of the preceding claims wherein the alcohol is selected from ethanediol, isopropanol, 2,3-butanediol and 2,5-dimethyl-2,5-hexanediol.
12. A process according to any one of the preceding claims wherein the proportion of the silicone-coated polyamide material to the aqueous composition is approximately 20:100 by weight.
13. A process according to any one of the preceding claims wherein the alkaline hydroxide is used at a concentration of 0.5 to 2.85 percent by weight of the aqueous composition.
14. Polyamide material which has been treated by a process according to any one of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0618060A GB2443471A (en) | 2006-09-13 | 2006-09-13 | Treatment of polyamides |
GB0618060.8 | 2006-09-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008032052A1 true WO2008032052A1 (en) | 2008-03-20 |
Family
ID=37309885
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2007/003442 WO2008032052A1 (en) | 2006-09-13 | 2007-09-12 | Treatment of polyamides |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2443471A (en) |
WO (1) | WO2008032052A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012130949A1 (en) | 2011-03-31 | 2012-10-04 | Rhodia Operations | Method for treating technical textiles |
JP7024037B1 (en) | 2020-10-30 | 2022-02-22 | 豊田通商株式会社 | Polyamide fiber recovery method, recycled polyamide product manufacturing method, and silicone solution |
JP7383093B1 (en) | 2022-08-02 | 2023-11-17 | 信越化学工業株式会社 | How to recycle silicone coated resin base material |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE675342A (en) * | 1965-01-19 | 1966-07-19 | ||
GB1093203A (en) * | 1965-02-05 | 1967-11-29 | Monsanto Co | Process for producing high viscosity nylon polymer and polymer so produced |
GB1221123A (en) * | 1967-03-09 | 1971-02-03 | Fiber Industries Inc | Improvements in production of shaped articles, such as filaments, from polyamides by melt spinning |
US4654041A (en) * | 1985-04-26 | 1987-03-31 | Hansa Textilchemie Gmbh | Process for the removal of silicones from fibers, yarns or two-dimensional textile materials |
JPS62149380A (en) * | 1985-12-23 | 1987-07-03 | Toray Ind Inc | Method for removing cured film |
EP0589642A1 (en) * | 1992-09-24 | 1994-03-30 | General Electric Company | Salvaging organic thermoplastics |
GB2316020A (en) * | 1996-08-12 | 1998-02-18 | Gen Electric | Removing coatings from thermoplastic substrates |
EP0950684A2 (en) * | 1998-04-17 | 1999-10-20 | F.A. Rueb Holding GmbH | Process for recycling a polyamide material which contains silicon resin |
US6011134A (en) * | 1998-01-30 | 2000-01-04 | E. I. Du Pont De Nemours And Company | Method for manufacturing poly(hexamethylene adipamide) from monomethyladipate and hexamethylenediamine |
JP2001180413A (en) * | 1999-12-24 | 2001-07-03 | Takata Corp | Silicon removing method for air bag scrap cloth |
WO2007009856A1 (en) * | 2005-07-15 | 2007-01-25 | Cht R. Beitlich Gmbh | Removing the silicone coating from coated fabrics and airbags |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69816417T2 (en) * | 1998-04-15 | 2004-01-29 | Sigarth Ab Hillerstorp | Device for mounting radiators on a surface |
-
2006
- 2006-09-13 GB GB0618060A patent/GB2443471A/en not_active Withdrawn
-
2007
- 2007-09-12 WO PCT/GB2007/003442 patent/WO2008032052A1/en active Application Filing
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE675342A (en) * | 1965-01-19 | 1966-07-19 | ||
GB1093203A (en) * | 1965-02-05 | 1967-11-29 | Monsanto Co | Process for producing high viscosity nylon polymer and polymer so produced |
GB1221123A (en) * | 1967-03-09 | 1971-02-03 | Fiber Industries Inc | Improvements in production of shaped articles, such as filaments, from polyamides by melt spinning |
US4654041A (en) * | 1985-04-26 | 1987-03-31 | Hansa Textilchemie Gmbh | Process for the removal of silicones from fibers, yarns or two-dimensional textile materials |
JPS62149380A (en) * | 1985-12-23 | 1987-07-03 | Toray Ind Inc | Method for removing cured film |
EP0589642A1 (en) * | 1992-09-24 | 1994-03-30 | General Electric Company | Salvaging organic thermoplastics |
GB2316020A (en) * | 1996-08-12 | 1998-02-18 | Gen Electric | Removing coatings from thermoplastic substrates |
US6011134A (en) * | 1998-01-30 | 2000-01-04 | E. I. Du Pont De Nemours And Company | Method for manufacturing poly(hexamethylene adipamide) from monomethyladipate and hexamethylenediamine |
EP0950684A2 (en) * | 1998-04-17 | 1999-10-20 | F.A. Rueb Holding GmbH | Process for recycling a polyamide material which contains silicon resin |
JP2001180413A (en) * | 1999-12-24 | 2001-07-03 | Takata Corp | Silicon removing method for air bag scrap cloth |
WO2007009856A1 (en) * | 2005-07-15 | 2007-01-25 | Cht R. Beitlich Gmbh | Removing the silicone coating from coated fabrics and airbags |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Week 198732, Derwent World Patents Index; AN 1987-224753, XP002458019 * |
DATABASE WPI Week 200153, Derwent World Patents Index; AN 2001-486201, XP002458018 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012130949A1 (en) | 2011-03-31 | 2012-10-04 | Rhodia Operations | Method for treating technical textiles |
FR2973274A1 (en) * | 2011-03-31 | 2012-10-05 | Rhodia Operations | METHOD OF PROCESSING TECHNICAL TEXTILES |
CN103459113A (en) * | 2011-03-31 | 2013-12-18 | 罗地亚运作公司 | Method for treating technical textiles |
KR20140022395A (en) * | 2011-03-31 | 2014-02-24 | 로디아 오퍼레이션스 | Method for treating technical textiles |
JP2014512284A (en) * | 2011-03-31 | 2014-05-22 | ローディア オペレーションズ | Technical cloth treatment method |
US9873212B2 (en) | 2011-03-31 | 2018-01-23 | Rhodia Operations | Process for the treatment of technical textiles |
CN103459113B (en) * | 2011-03-31 | 2018-09-18 | 罗地亚运作公司 | Method for handling industrial textile |
KR102005120B1 (en) | 2011-03-31 | 2019-07-29 | 로디아 오퍼레이션스 | Method for treating technical textiles |
JP7024037B1 (en) | 2020-10-30 | 2022-02-22 | 豊田通商株式会社 | Polyamide fiber recovery method, recycled polyamide product manufacturing method, and silicone solution |
JP2022073181A (en) * | 2020-10-30 | 2022-05-17 | 豊田通商株式会社 | Method for collecting polyamide fiber, method for manufacturing recycled polyamide product, and dissolution solution of silicone |
JP7383093B1 (en) | 2022-08-02 | 2023-11-17 | 信越化学工業株式会社 | How to recycle silicone coated resin base material |
Also Published As
Publication number | Publication date |
---|---|
GB0618060D0 (en) | 2006-10-25 |
GB2443471A (en) | 2008-05-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1191346C (en) | Fabric care composition | |
EP1957705B1 (en) | Process for finishing textiles | |
US8221507B2 (en) | Removing the silicone coating from coated fabrics and airbags | |
WO2008032052A1 (en) | Treatment of polyamides | |
WO2022159858A1 (en) | Launderable activated cotton | |
JP5171268B2 (en) | Elastic fabric | |
CN111826959A (en) | Flame retardant auxiliary, flame retardant processing agent composition, and method for producing flame-retardant fiber fabric | |
WO2018138497A1 (en) | Formulation comprising polymer particles and a method of treating a substrate with said formulation in a liquid medium | |
US6008182A (en) | Prevention of dye redeposition in fabric washing processes | |
CN108779602B (en) | Improved method for removing textile dyes | |
JP2010144279A (en) | Patterned denim product and method for producing the same | |
CN1950565A (en) | Textile benefit compositions | |
CA2676238C (en) | Method of producing substantially wrinkle-free textile surfaces | |
US7999034B2 (en) | Benefit compositions and methods | |
EP0351065A1 (en) | Process for producing sculptured pile fabric | |
JP2015221950A (en) | Fiber product treatment liquid and treatment method of fiber product | |
JP4264767B2 (en) | Cellulosic fiber-containing fiber structure for form-stable processing and method for producing form-stable cellulosic fiber-containing fiber structure | |
JP2010144277A (en) | Denim product and method for producing the same | |
US10640903B2 (en) | Process for treating at least one garment | |
WO2010115664A2 (en) | Fabric conditioning composition | |
JP3545166B2 (en) | Extrusion-processed product and its manufacturing method | |
JP2000154466A (en) | Processing agent for textile and method for processing textile | |
JP4079844B2 (en) | Anti-dyeing agent and method for treating fiber material | |
JP2006097172A (en) | Method for producing dyed cloth of mixed fabric of polyester fiber and polyurethane fiber | |
JP2000096093A (en) | Washing pre-treating agent composition for laundry |
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: 07804236 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: 07804236 Country of ref document: EP Kind code of ref document: A1 |