US4357462A
Expired / Lapsed
US
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Process for producing lactone high polymers
Assignee: Daicel Corp
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Filing: 1981-03-16
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Granted: 1982-11-02
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Expires: 2001-03-16
Abstract
Abstract A process for producing resinous lactone high polymers by the catalytic polymerization of lactones having a water content of less than 0.1% in the presence of a catalyst selected from the group consisting of stannous chloride, stannous bromide, stannous iodide, titanium trichloride, titanium tetrachloride, ammonium molybdate, zirconium nitrate, zirconium oxychloride and zirconium carboxylates, as a catalyst.
Inventors
- 👤 Masayoshi Kubo
- 👤 Kimio Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:08
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/823
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
86 words
A process for preparing a rigid polymer having a number-average molecular weight of higher than 20,000, which comprises the steps of polymerizing a polymerizable lactone monomer having a water content of less than 0.1 percent by weight, in the presence of a catalytically effective amount of a catalyst selected from the group consisting of stannous chloride, stannous chloride dihydrate, stannous bromide, stannous iodide, titanium trichloride, titanium tetrachloride, ammonium molybdate, zirconium nitrate, zirconium oxychloride and zirconyl carboxylates, until said polymer is formed; and then recovering said polymer.
Claim 2
Dependent Claim
86 words
A process for preparing a rigid polymer having a number-average molecular weight of higher than 20,000, which comprises the steps of polymerizing a polymerizable lactone monomer having a water content of less than 0.1 percent by weight, in the presence of a catalytically effective amount of a catalyst selected from the group consisting of stannous chloride, stannous chloride dihydrate, stannous bromide, stannous iodide, titanium trichloride, titanium tetrachloride, ammonium molybdate, zirconium nitrate, zirconium oxychloride and zirconyl carboxylates, until said polymer is formed; and then recovering said polymer.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 in which the polymerization temperature is from 50° to 200° C.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1 in which the polymerization temperature is from 130° to 170° C.
Claim 5
Dependent Claim
33 words
A process as claimed in claim 1, claim 2 or claim 3 in which the amount of said catalyst is from 0.0005 to 1.0 wt. %, based on the weight of said lactone.
Claim 6
Dependent Claim
33 words
A process as claimed in claim 1, claim 2 or claim 3 in which the amount of said catalyst is from 0.001 to 0.1 wt. %, based on the weight of said lactone.
Claim 7
Dependent Claim
51 words
A process as claimed in claim 1 in which the polymerization is performed by bulk polymerization or by solution polymerization wherein said lactone is dissolved in an inert organic solvent, and the polymerization is carried out in the substantial absence of water and organic initiator and under an inert gas atmosphere.
Claim 8
Dependent Claim
29 words
A process as claimed in claim 1, in which said lactone is selected from the group consisting of δ-valerolactone, β-ethyl-δ-valerolactone, ε-caprolactone, α-methyl-ε-caprolactone, β-methyl-ε-caprolactone, γ-methyl-ε-caprolactone, β,δ-dimethyl-ε-caprolactone, 3,3,5-trimethyl-ε-caprolactone, enanthlactone and dodecanolactone.
Claim 9
Dependent Claim
22 words
A process as claimed in claim 1 in which said catalyst is stannous chloride, stannous chloride dihydrate, stannous bromide or stannous iodide.
Claim 10
Dependent Claim
17 words
A process as claimed in claim 1 in which said catalyst is titanium trichloride or titanium tetrachloride.
Claim 11
Dependent Claim
14 words
A process as claimed in claim 1, in which said catalyst is ammonium molybdate.
Claim 12
Dependent Claim
17 words
A process as claimed in claim 1 in which said catalyst is zirconium nitrate or zirconium oxychloride.
Claim 13
Dependent Claim
19 words
A process as claimed in claim 1 in which said catalyst is zirconyl salt of mono- or polycarboxylic acid.
Claim 14
Dependent Claim
13 words
A process as claimed in claim 1 in which said lactone is ε-caprolactone.
Claim 15
Dependent Claim
20 words
A process as claimed in claim 1 in which said lactone has at least five carbon atoms in the ring.
Claim 16
Dependent Claim
20 words
A process as claimed in claim 1 in which said lactone has six to twelve carbon atoms in the ring.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |