Patent US3846375A successfully refreshed from Google Patents.
US3846375A
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Aromatic polyether oxetane resins
Assignee: 3M Co
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Filing: 1973-09-17
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Granted: 1974-11-05
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Expires: 1993-09-17
Abstract
Abstract The disclosed polymers are prepared from the interaction of a difunctional alkali metal phenate and a dihalide. At least some of the dihalide should be an aliphatic compound containing an oxetane (oxacyclobutane) ring attached to a carbon of the aliphatic chain. Up to 90 mole percent of the dihalide can, however, be an aromatic dihalide containing an electronwithdrawing group substituted on the aromatic nucleus, e.g., a sulfone group. The resulting oxetane-containing polymers can be crosslinked by reactions similar to those used to crosslink epoxy resins.
Inventors
- 👤 R Wear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:22
CPC Classifications
C; C08; C08L; C08L71/00; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G65/18; C08G65/34; C08G65/38; C08G65/40; C08G65/4006; C08G65/4012; C08G65/4043; C08G65/405; C08G75/00; C08G75/20; C08G75/23; C08G2650/00; C08G2650/02; C08G2650/20; C08L2312/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
13 words
AN AROMATIC CONTAINING POLYETHER POLYMER CONSISTING ESSENTIALLY OF I. UNITS OF THE FORMULA
Claim 2
Dependent Claim
13 words
AN AROMATIC CONTAINING POLYETHER POLYMER CONSISTING ESSENTIALLY OF I. UNITS OF THE FORMULA
Claim 3
Dependent Claim
32 words
reacting the product of step (1) with an aromatic dihalide having a halogen activating, ring-substituted electron-withdrawing group, wherein said oxetane-containing compound is at least 10 mole percent of the total halide component.
Claim 4
Dependent Claim
32 words
reacting the product of step (1) with an aromatic dihalide having a halogen activating, ring-substituted electron-withdrawing group, wherein said oxetane-containing compound is at least 10 mole percent of the total halide component.
Claim 5
Dependent Claim
14 words
A polyether polymer according to claim 1 wherein A1 and A2 are methylene radicals.
Claim 6
Dependent Claim
33 words
A polymer according to claim 1 wherein said polymer comprises 20 - 85 mole percent of units of said formula (b) and 15 - 80 mole percent of units of said formula (a).
Claim 7
Dependent Claim
21 words
A polymer according to claim 3 wherein said polymer comprises 20 - 40 mole percent of units of said formula (a).
Claim 8
Dependent Claim
23 words
A polymer according to claim 1 wherein said polymer has been crosslinked with a crosslinking agent capable of reacting with an oxetane ring.
Claim 9
Dependent Claim
17 words
A polymer according to claim 5 wherein said crosslinking agent is derived from an aromatic polycarboxylic acid.
Claim 10
Dependent Claim
34 words
A polymer according to claim 6 wherein said crosslinking agent derived from an aromatic carboxylic acid is selected from the group consisting of a polyacid chloride, a chloro-substituted dicarboxylic acid, and a polyacid anhydride.
Claim 11
Dependent Claim
5 words
A polymer having the formula
Claim 12
Dependent Claim
5 words
A polymer having the formula
Claim 13
Dependent Claim
13 words
A polymer according to claim 8 wherein A1 and A2 are methylene radicals.
Claim 14
Dependent Claim
22 words
A polymer according to claim 8 wherein at least one of the R groups in each of the -CR2- radicals is hydrogen.
Claim 15
Dependent Claim
32 words
A polymer according to claim 8 wherein Ar1 is the residue of bisphenol A wIth the phenolic hydrogens removed and Ar2 is the residue of p-dichlorodiphenyl sulfone with the chlorine atoms removed.
Claim 16
Dependent Claim
11 words
A process for preparing an oxetane-containing polymer comprising the steps of:
Claim 17
Dependent Claim
11 words
A process for preparing an oxetane-containing polymer comprising the steps of:
Claim 18
Dependent Claim
13 words
A process according to claim 12 wherein A1 and A2 are methylene radicals.
Claim 19
Dependent Claim
21 words
A process according to claim 12 wherein the product of said step (2) is subsequently further reacted with additional oxetane-containing compound.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |