GB1492838A - Conversion of scrap polyurethane foam to polyols - Google Patents
Conversion of scrap polyurethane foam to polyolsInfo
- Publication number
- GB1492838A GB1492838A GB1418675A GB1418675A GB1492838A GB 1492838 A GB1492838 A GB 1492838A GB 1418675 A GB1418675 A GB 1418675A GB 1418675 A GB1418675 A GB 1418675A GB 1492838 A GB1492838 A GB 1492838A
- Authority
- GB
- United Kingdom
- Prior art keywords
- foam
- scrap
- polyols
- mixture
- flexible
- 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
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
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
-
- 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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1492838 Conversion of scrap polyurethane foam to polyols UPJOHN CO 7 April 1975 [29 April 1974] 14186/75 Heading C3R A process for converting scrap polyurethane foam, which foam, or at least a part of it, is a flexible foam derived from a polyether polyol, to a homogeneous mixture of polyols comprises heating the said scrap foam at a temperature of 180‹-250‹ C. with an aliphatic diol of the formula HO-A-OH wherein A is selected from a C 2 -C 6 alkylene radical and a C 2 -C 6 alkylene-ether radical, both of which radicals carry at least one C 1 -C 6 alkyl substituent on a carbon atom in the chain thereof, said diol being present in an amount by weight which does not exceed the total weight of said scrap foam, so as to result in a single phase product consisting essentially of a homogeneous mixture of polyols. The scrap flexible foam may be used in combination with scrap from a foam selected from semi-rigid or rigid polyurethane foam, or rigid polyisocyanurate foam for example in an amount up to 75% by weight based on the weight of the scrap flexible foam. Suitable diols are 1,2-propylene glycol, 1,2-butanediol, 1,2-hexanediol, di-(1,2-propylene glycol), di-(1,2-butylene glycol), 3-methylpentane-1,5-diol, 2,2-dimethyl- 1,3-propanediol and 1,2-octanediol and mixtures thereof. The process can be carried out continuously. The product generally has an OH equivalent weight of 65-120 and a viscosity of 300-4500 cs at 25‹ C., and can be reused in the manufacture of polyurethane foams. In Examples 1-3, 5 and 6 scrap foam prepared from the following formulation toluene diisocyanate, propoxylated glycerol, stannous octoate, -N-ethylmorpholine, triethylene-diamine, a surfactant and water, is converted to a homogeneous mixture of polyols by heating with 1,2- propylene glycol or 1,2-butanediol or 3-methyl pentane 1,5-diol. In Example 8 a scrap mixture of a commercial flexible polyether-based polyurethane foam and a semi-flexible polyurethane foam prepared from polymethylene polyphenyl polyisocyanate, propoxylated trimethylolpropane, a blend of N,N-di-(2-hydroxypropyl) aniline and a polyol derived from nonylphenol, diethanolamine and formaldehyde capped with propylene-oxide, N,N<SP>1</SP>,N<SP>11</SP>-tris-(dimethylaminopropyl) hexahydrotriazine, triethanolamine, water dibutyltin dilaurate and trichlorofluoromethane is converted to a mixture of polyols by heating with 1,2-propylene glycol. In Example 9 a polyurethane scrap mixture of a commercial flexible polyether-based foam and a rigid foam prepared from a propoxylated polymethylene polyphenyl polyamine, a propoxylated glycerol, an adduct of phosphoric acid and propylene oxide, trimethylol propane, an organosilicone surfactant, water, tetramethylguanidine, tetramethylbutane diamine, trichlorofluoromethane and polymethylene polyphenyl polyisocyanate is converted to a mixture of polyols as in Example 8. In Example 10 a mixture of polyols prepared by heating scrap from a commercial flexible polyether-based polyurethane foam with 1,2-propylene glycol is used to prepare a rigid foam using a reaction mixture additionally comprising a propoxylated polymethylene polyphenyl polyamine, a propoxylated glycerol, triethylenediamine, an organosilicone surfactant, trichlorofluoromethane and polymethylene polyphenyl polyisocyanate.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US46485674A | 1974-04-29 | 1974-04-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1492838A true GB1492838A (en) | 1977-11-23 |
Family
ID=23845529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1418675A Expired GB1492838A (en) | 1974-04-29 | 1975-04-07 | Conversion of scrap polyurethane foam to polyols |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5329359B2 (en) |
CA (1) | CA1042146A (en) |
DE (1) | DE2516863B2 (en) |
ES (1) | ES436853A1 (en) |
FR (1) | FR2268825B1 (en) |
GB (1) | GB1492838A (en) |
IT (1) | IT1035248B (en) |
NL (1) | NL159418B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4511680A (en) * | 1982-09-01 | 1985-04-16 | Bayer Aktiengesellschaft | Process for the continuous high temperature glycolytic cleavage of polyurethane plastics waste in screw machines |
GB2272445A (en) * | 1992-11-14 | 1994-05-18 | Caligen Foam Ltd | Recycling polyurethane foam |
US5684054A (en) * | 1994-09-22 | 1997-11-04 | Daimler-Benz Ag | Process for recovering secondary polyols from polyadducts mixed with nonglycolysable materials |
CN112029148A (en) * | 2020-08-31 | 2020-12-04 | 浙江工业大学 | Method for recycling polyether polyol in waste polyurethane foam by using emulsion system |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2951617C2 (en) * | 1979-12-21 | 1985-08-14 | Wilhelm Prof. Dr.-Ing. 5100 Aachen Schütz | Process and system for processing polyurethane |
DE3618007A1 (en) * | 1986-05-28 | 1987-12-03 | Bayer Ag | METHOD FOR PRODUCING HYDROXYPHENYLURETHANES |
DE4024601C2 (en) * | 1990-08-02 | 1997-04-03 | Gunter Prof Dr Bauer | Process for the preparation of polyol-containing dispersions and their use |
DE4234335A1 (en) | 1992-10-12 | 1994-04-14 | Basf Schwarzheide Gmbh | Process for the production of recycled polyols and their use in the production of polyurethanes |
DE4323558C2 (en) * | 1993-07-14 | 2001-02-15 | Gore & Ass | Process for the isolation and recycling of textile materials from polyurethane-bonded textile laminates |
DE4411864A1 (en) * | 1994-04-08 | 1995-10-12 | Basf Schwarzheide Gmbh | Process for the production of hard to tough polyurethane foams with an increased proportion of open cells and reduced shrinkage |
DE4442379A1 (en) | 1994-11-29 | 1996-05-30 | Bayer Ag | Process for the glycolytic degradation of polyurethane plastics |
JP2011246569A (en) * | 2010-05-26 | 2011-12-08 | Inoac Corp | Recyclable polyurethane foam, method of manufacturing recycled polyol, and method of manufacturing polyurethane foam using the recycled polyol |
-
1975
- 1975-04-03 CA CA223,810A patent/CA1042146A/en not_active Expired
- 1975-04-07 GB GB1418675A patent/GB1492838A/en not_active Expired
- 1975-04-09 IT IT4901975A patent/IT1035248B/en active
- 1975-04-15 NL NL7504473A patent/NL159418B/en not_active IP Right Cessation
- 1975-04-17 DE DE19752516863 patent/DE2516863B2/en not_active Ceased
- 1975-04-22 ES ES436853A patent/ES436853A1/en not_active Expired
- 1975-04-28 FR FR7513221A patent/FR2268825B1/fr not_active Expired
- 1975-04-28 JP JP5195875A patent/JPS5329359B2/ja not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4511680A (en) * | 1982-09-01 | 1985-04-16 | Bayer Aktiengesellschaft | Process for the continuous high temperature glycolytic cleavage of polyurethane plastics waste in screw machines |
GB2272445A (en) * | 1992-11-14 | 1994-05-18 | Caligen Foam Ltd | Recycling polyurethane foam |
US5684054A (en) * | 1994-09-22 | 1997-11-04 | Daimler-Benz Ag | Process for recovering secondary polyols from polyadducts mixed with nonglycolysable materials |
CN112029148A (en) * | 2020-08-31 | 2020-12-04 | 浙江工业大学 | Method for recycling polyether polyol in waste polyurethane foam by using emulsion system |
Also Published As
Publication number | Publication date |
---|---|
JPS50149606A (en) | 1975-11-29 |
CA1042146A (en) | 1978-11-07 |
JPS5329359B2 (en) | 1978-08-19 |
DE2516863B2 (en) | 1977-03-03 |
AU7984375A (en) | 1976-10-07 |
ES436853A1 (en) | 1976-12-01 |
FR2268825B1 (en) | 1977-07-08 |
DE2516863A1 (en) | 1975-10-30 |
IT1035248B (en) | 1979-10-20 |
NL7504473A (en) | 1975-10-31 |
FR2268825A1 (en) | 1975-11-21 |
NL159418B (en) | 1979-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19950406 |