US4031112A
Expired / Lapsed
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Cyclic acetals
Assignee: BASF SE
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Filing: 1976-02-17
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Granted: 1977-06-21
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Expires: 1996-02-17
Abstract
Abstract Cyclic acetals or ketals of carbonyl compounds having at least one aliphatic or aromatic radical, and polyhydric alcohols which have at least one more hydroxyl group than those required for acetalization, and which are furthermore oxyalkylated at the free hydroxyl group or groups.
Inventors
- 👤 Knut Oppenlaender
- 👤 Guenter Uhl
- 👤 Herbert Helfert
- 👤 Hans-Georg Scharpenberg
- 👤 Karl Stork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:25
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/04; C07D319/00; C07D319/04; C07D319/06; C09; C09K; C09K23/00; C09K23/16; C09K23/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
Cyclic acetals or ketals of the formula I ##STR6## where R 1 is alkyl of 1 to 20 carbon atoms, alkenyl of 2 to 20 carbon atoms phenyl, p-nitrophenyl, hydroxyphenyl, p-dimethylaminophenyl, o-, m-, or p-chlorophenyl o-bromophenyl, R 2 is hydrogen or has one of the meanings defined for R 1 , said meaning being identical to or different from R 1 , or R 1 and R 2 together are an aliphatic five-membered or six-membered ring, A is a radical, free from hydroxyl groups, of a polyalcohol with 2 z + y OH groups and of 3 to 6 carbon atoms, z is 1 or 2, y is 1 or 2, m is from 5 to 20 and n is from 10 to 100.
Claim 2
Dependent Claim
124 words
Cyclic acetals or ketals of the formula I ##STR6## where R 1 is alkyl of 1 to 20 carbon atoms, alkenyl of 2 to 20 carbon atoms phenyl, p-nitrophenyl, hydroxyphenyl, p-dimethylaminophenyl, o-, m-, or p-chlorophenyl o-bromophenyl, R 2 is hydrogen or has one of the meanings defined for R 1 , said meaning being identical to or different from R 1 , or R 1 and R 2 together are an aliphatic five-membered or six-membered ring, A is a radical, free from hydroxyl groups, of a polyalcohol with 2 z + y OH groups and of 3 to 6 carbon atoms, z is 1 or 2, y is 1 or 2, m is from 5 to 20 and n is from 10 to 100.
Claim 3
Dependent Claim
42 words
Cyclic acetals of the formula I as claimed in claim 1, in which R 1 is alkyl of 3 to 20 carbon atoms, R 2 is hydrogen and A is the hydroxyl-free radical of glycerol, n-butanetetrol, sorbitol, methylglycerol, ethylglycerol, trimethylolpropane or pentaerythritol.
Claim 4
Dependent Claim
43 words
Cyclic ketals of the formula I as claimed in claim 1, in which R 1 and R 2 are identical or different and each is methyl, ethyl, n-butyl, n-pentyl or phenyl, or R 1 and R 2 together are an aliphatic six-membered ring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |