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US3621034A
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Tetraoxaspiro(5,5)undecanes and process for the preparation thereof
Assignee: Merck KGaA
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Filing: 1969-11-25
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Granted: 1971-11-16
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Expires: 1989-11-25
Abstract
Abstract Tetraoxaspiro(5,5)undecanes of the formula WHEREIN A is alkylene of 1-4 carbon atoms, X is O or S and R1 is alkyl of 2-21 carbon atoms or -(CH2)n-COOR2 in which n is 1-3 and R2 is alkyl of up to 18 carbon atoms, which are stabilizers for polyolefins and other polymers, are produced by reacting pentaerythritol with an aldehyde of the formula R1-X-A-CHO or by reacting the corresponding bis-p,p''-alkenyl substituted or bis-p, p''-hydroxyalkyl substituted tetraoxaspirol(5,5)undecanes with a compound of the formula R1-XH in which R1, X and A have the values given above. D R A W I N G
Inventors
- 👤 Wolfgang Fruhstorfer
- 👤 Istvan Nameny
- 👤 Wilhelm Baumer
- 👤 Bernd Dennler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:24
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/1575; C08K5/36; C08K5/37; C08K5/378
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
35 words
A compound of claim 1 wherein A is an alkylene group of the formula -CHR3-(CHR4)m- in which R3 is H or CH3, R4 is H or CH3 and m is the integer 0 or 1.
Claim 2
Dependent Claim
9 words
A compound of claim 2 wherein R3 is H.
Claim 3
Dependent Claim
9 words
A compound of claim 3 wherein m is O.
Claim 4
Dependent Claim
13 words
A compound of claim 3 wherein m is 1 and R4 is H.
Claim 5
Dependent Claim
13 words
A compound of claim 3 wherein m is 1 and R4 is CH3.
Claim 6
Dependent Claim
15 words
A compound of claim 1 wherein R1 is alkyl of two to 21 carbon atoms.
Claim 7
Dependent Claim
15 words
A compound of claim 7 wherein R1 is alkyl of eight to 18 carbon atoms.
Claim 8
Dependent Claim
16 words
A compound of claim 7 wherein R3 is H, m is 1 and R4 is H.
Claim 9
Dependent Claim
15 words
A compound of claim 9 wherein R1 is alkyl of eight to 18 carbon atoms.
Claim 10
Dependent Claim
14 words
A compound of claim 1 wherein R1 is a group of the formula -(CH2)n-COOR2.
Claim 11
Dependent Claim
9 words
A compound of claim 11 wherein n is 1.
Claim 12
Dependent Claim
9 words
A compound of claim 12 wherein A is -CH2CH2-.
Claim 13
Dependent Claim
15 words
A compound of claim 11 wherein R2 is alkyl of seven to 18 carbon atoms.
Claim 14
Dependent Claim
9 words
A compound of claim 14 wherein A is -CH2CH2-.
Claim 15
Dependent Claim
7 words
The compound of claim 5, 3,9-Bis-(2-n-dodecylthioethyl)-2,4, 8,10-tetraoxaspiro(5,5)undecane.
Claim 16
Dependent Claim
7 words
The compound of claim 5, 3,9-Bis-(2-isooctyloxy-ethyl)-2,4, 8,10-tetraoxaspiro(5,5)undecane.
Claim 17
Dependent Claim
7 words
The compound of claim 13, 3,9-Bis-(2-n-dodecyloxycarbonylmethylthioethyl)-2,4,8,10-tetraoxaspiro(5, 5)undecane.
Claim 18
Dependent Claim
7 words
The compound of claim 13, 3,9-Bis-(2-n-octadecyloxycarbonylmethythioethyl)-2,4,8,10-tetraoxaspiro(5, 5)undecane.
Claim 19
Dependent Claim
7 words
The compound of claim 13, 3,9-Bis-(2-isooctyloxycarbonylmethylthioethyl)-2,4,8,10-tetraoxaspiro(5, 5)undecane.
References Cited (Backward Citations)
US3136785A
Cited
US3161619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |