GB1382243A - Solvent-soluble polyurethanes - Google Patents
Solvent-soluble polyurethanesInfo
- Publication number
- GB1382243A GB1382243A GB816071A GB816071A GB1382243A GB 1382243 A GB1382243 A GB 1382243A GB 816071 A GB816071 A GB 816071A GB 816071 A GB816071 A GB 816071A GB 1382243 A GB1382243 A GB 1382243A
- Authority
- GB
- United Kingdom
- Prior art keywords
- product
- dimethylformamide
- prepolymer
- insoluble
- diol
- 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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0895—Manufacture of polymers by continuous processes
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
1382243 Thermoplastic polyurethanes IMPERIAL CHEMICAL INDUSTRIES Ltd 8 March 1972 [30 March 1971] 8160/71 Heading C3R Thermoplastic polyurethane elastomers are prepared by (1) reacting a substantially linear polypropylene glycol of M.W. greater than 800 with an excess of an organic diisocyanate to form a prepolymer, (2) reacting the prepolymer with a diol of M.W. at most 250 in such proportions that (a) the ratio of NCO groups in the prepolymer to hydroxyl groups in the diol is at most 1 : 1 and (b) there is produced a polyurethane which is insoluble in dimethylformamide, (3) heating the insoluble product until a dimethylformamide-soluble product is obtained, (4) dissolving the product in dimethylformamide and (5) removing the dimethylformamide to produce a solid polyurethane product. Step (3) of the process is preferably carried out by heating the insoluble product to a temperature of 180‹ to 220‹ C., suitably with mechanical working thereof. The mechanical working may be achieved by injection moulding techniques or by passing the product through a heated barrel by means of a screwed or scrolled axially rotatable shaft. The finally formed dimethylformamide-soluble product is suitably used as a textile coating.
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB816071A GB1382243A (en) | 1971-03-30 | 1971-03-30 | Solvent-soluble polyurethanes |
ZA721809A ZA721809B (en) | 1971-03-30 | 1972-03-16 | Solvent-soluble polyurethanes |
IT2235972A IT950742B (en) | 1971-03-30 | 1972-03-24 | SOLVENT-SOLUBLE POLYURETHANES |
BE781247A BE781247A (en) | 1971-03-30 | 1972-03-24 | SOLUBLE POLYURETHANNES IN SOLVENTS |
NL7204138A NL7204138A (en) | 1971-03-30 | 1972-03-28 | |
FR7211088A FR2132198A1 (en) | 1971-03-30 | 1972-03-29 | |
ES401349A ES401349A1 (en) | 1971-03-30 | 1972-03-29 | Solvent-soluble polyurethanes |
AT277972A AT326919B (en) | 1971-03-30 | 1972-03-30 | PROCESS FOR MANUFACTURING SOLVENT-SOLUBLE POLYURETHANE ELASTOMERS |
DE19722215736 DE2215736A1 (en) | 1971-03-30 | 1972-03-30 | Soluble Polyurethanes |
CA138,701A CA981846A (en) | 1971-03-30 | 1972-03-30 | Solvent-soluble polyurethanes |
US424424A US3887525A (en) | 1971-03-30 | 1973-12-13 | Process for preparing solvent-soluble polyurethanes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB816071A GB1382243A (en) | 1971-03-30 | 1971-03-30 | Solvent-soluble polyurethanes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1382243A true GB1382243A (en) | 1975-01-29 |
Family
ID=9846916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB816071A Expired GB1382243A (en) | 1971-03-30 | 1971-03-30 | Solvent-soluble polyurethanes |
Country Status (10)
Country | Link |
---|---|
AT (1) | AT326919B (en) |
BE (1) | BE781247A (en) |
CA (1) | CA981846A (en) |
DE (1) | DE2215736A1 (en) |
ES (1) | ES401349A1 (en) |
FR (1) | FR2132198A1 (en) |
GB (1) | GB1382243A (en) |
IT (1) | IT950742B (en) |
NL (1) | NL7204138A (en) |
ZA (1) | ZA721809B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4120850A (en) * | 1977-09-06 | 1978-10-17 | E. I. Du Pont De Nemours And Company | Polyether urethane polymers prepared from a copolymer of tetrahydrofuran and ethylene oxide |
US4225696A (en) * | 1979-02-21 | 1980-09-30 | Polythetics, Inc. | Prosthetic denture prepared from polyurethane elastomer |
-
1971
- 1971-03-30 GB GB816071A patent/GB1382243A/en not_active Expired
-
1972
- 1972-03-16 ZA ZA721809A patent/ZA721809B/en unknown
- 1972-03-24 IT IT2235972A patent/IT950742B/en active
- 1972-03-24 BE BE781247A patent/BE781247A/en unknown
- 1972-03-28 NL NL7204138A patent/NL7204138A/xx unknown
- 1972-03-29 ES ES401349A patent/ES401349A1/en not_active Expired
- 1972-03-29 FR FR7211088A patent/FR2132198A1/fr not_active Withdrawn
- 1972-03-30 DE DE19722215736 patent/DE2215736A1/en active Pending
- 1972-03-30 AT AT277972A patent/AT326919B/en not_active IP Right Cessation
- 1972-03-30 CA CA138,701A patent/CA981846A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2215736A1 (en) | 1972-10-12 |
IT950742B (en) | 1973-06-20 |
ES401349A1 (en) | 1975-02-16 |
AT326919B (en) | 1976-01-12 |
FR2132198A1 (en) | 1972-11-17 |
ZA721809B (en) | 1972-12-27 |
ATA277972A (en) | 1975-03-15 |
NL7204138A (en) | 1972-10-03 |
BE781247A (en) | 1972-09-25 |
CA981846A (en) | 1976-01-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |