US4078148A
Expired / Lapsed
US
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Polyether esters
Assignee: Dynamit Nobel AG
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Filing: 1973-10-10
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Granted: 1978-03-07
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Expires: 1993-10-10
Abstract
Abstract Polyether ester polymers of tetrahydrofuran and gamma -butyrolactone or hexamethyleneoxide and gamma -butyrolactone. The polymers are prepared by contacting the mentioned monomers in the presence a fluoride or chloride of antimony or a chloride of tin or titanium. The polymers can be used as components in the preparation of polyurethanes.
Inventors
- 👤 Norbert Vollkommer
- 👤 Hermann Richtzenhain
- 👤 Gerhard Bier
- 👤 Manfred Gorlitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:53
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G63/00; C08G63/66; C08G63/664; C08G65/08; C08G65/20
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
82 words
Process for the preparation of a polymer which is the addition polymerization product of tetrahydrofuran and γ-butyrolacetone (I), or hexamethyleneoxide and Γ-butyrolactone (II), comprising contacting tetrahydrofuran and γ-butyrolactone for (I), or hexamethyleneoxide and γ-butyrolactone (II), in the presence of an initiator, said initiator being a fluoride or chloride of antimony or a chloride of tin or titanium, in an amount sufficient to initiate the addition polymerization, and conducting said contacting at a temperature and for a time sufficient for the addition polymerization.
Claim 2
Dependent Claim
82 words
Process for the preparation of a polymer which is the addition polymerization product of tetrahydrofuran and γ-butyrolacetone (I), or hexamethyleneoxide and Γ-butyrolactone (II), comprising contacting tetrahydrofuran and γ-butyrolactone for (I), or hexamethyleneoxide and γ-butyrolactone (II), in the presence of an initiator, said initiator being a fluoride or chloride of antimony or a chloride of tin or titanium, in an amount sufficient to initiate the addition polymerization, and conducting said contacting at a temperature and for a time sufficient for the addition polymerization.
Claim 3
Dependent Claim
15 words
Process according to claim 1, wherein the addition polymerization product is of tetrahydrofuran and γ-butyrolactone.
Claim 4
Dependent Claim
15 words
Process according to claim 1, wherein the addition polymerization product is of hexamethyleneoxide and γ-butyrolactone.
Claim 5
Dependent Claim
13 words
Process according to claim 1, the temperature being -100° C to 150° C.
Claim 6
Dependent Claim
13 words
Process according to claim 2, the temperature being -70° C to 70° C.
Claim 7
Dependent Claim
13 words
Process according to claim 3, the temperature being 20° C to 120° C.
Claim 8
Dependent Claim
31 words
Process according to claim 1, said initiator being at least one of SbCl 5 , SbF 5 , SbCl 3 , SbF 3 , SnCl 4 , and TiCl 4 .
Claim 9
Dependent Claim
24 words
Process according to claim 7, the initiator being present in amount of 0.1 - 10 wt.% with reference to the weight of the monomers.
Claim 10
Dependent Claim
22 words
Process according to claim 8, and conducting said contacting in the presence of epichlorohydrin in an amount sufficient to accelerate the reaction.
Claim 11
Dependent Claim
30 words
Process according to claim 2, said initiator being at least one of SbCl 5 , SbF 5 , SbCl 3 , SbF 3l , SnCl.sub. 4, and TiCl 4 .
Claim 12
Dependent Claim
31 words
Process according to claim 3, said initiator being at least one of SbCl 5 , SbF 5 , SbCl 3 , SbF 3 , Sn Cl 4 and TiCl 4 .
Claim 13
Dependent Claim
15 words
Process according to claim 10, wherein the initiator is SbF 5 or SbCl 5 .
Claim 14
Dependent Claim
15 words
Process according to claim 11, wherein the initiator is SbF 5 or SbCl 5 .
Claim 15
Dependent Claim
8 words
Product produced by the process of claim 2.
Claim 16
Dependent Claim
8 words
Product produced by the process of claim 3.
Claim 17
Dependent Claim
22 words
Process according to claim 3, and conducting said contacting in the presence of epichlorohydrin in an amount sufficient to accelerate the reaction.
Claim 18
Dependent Claim
35 words
Process according to claim 1, wherein the mole ratio of tetrahydrofuran and γ-butyrolactone, or hexamethyleneoxide and γ-butyrolactone is such that the corresponding mole ratio in the polymer is in the range of 200:1 to 1:1.
Claim 19
Dependent Claim
35 words
Process according to claim 4, wherein the mole ratio of tetrahydrofuran and γ-butyrolactone, or hexamethyleneoxide and γ-butyrolactone is such that the corresponding mole ratio in the polymer is in the range of 200:1 to 1:1.
References Cited (Backward Citations)
US2917410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |