US3963668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced polyoxymethylene molding compositions
Assignee: BASF SE
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Filing: 1975-02-13
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Granted: 1976-06-15
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Expires: 1995-02-13
Abstract
Abstract Thermoplastic molding compositions of polyoxymethylenes and glass fibers and containing from 0.1 to 5.0 per cent, by weight of the total weight of the mixture, of alkoxymethyl ureas having the formula ##EQU1## where R 1 and R 2 are the same or different and denote straight-chain or branched-chain alkyl of from 1 to 10 carbon atoms and R 3 and R 4 denote hydrogen or alkyl, or R 3 and R 4 are joined together to form a heterocyclic ring with the adjacent ureido group.
Inventors
- 👤 Rolf Wurmb
- 👤 Franz Schmidt
- 👤 Harro Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/21; C08K5/34; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
34 words
An improved glass-fiber reinforced polyoxymethylene which contains, in addition to said polyoxymethylene and said glass fibers from 0.1 to 5% by weight based on the total weight of the composition of an alkoxymethyl urea.
Claim 2
Dependent Claim
34 words
An improved glass-fiber reinforced polyoxymethylene which contains, in addition to said polyoxymethylene and said glass fibers from 0.1 to 5% by weight based on the total weight of the composition of an alkoxymethyl urea.
Claim 3
Dependent Claim
37 words
An improved molding composition as set forth in claim 1 wherein said alkoxymethyl urea is selected from the group consisting of N,N'-dimethoxymethyl urea, N,N'-diethoxymethyl urea, N-methoxymethyl-N'-methyl urea, N,N-dimethyl-N'-methoxymethyl urea, N,N,N'-trimethoxymethyl urea, N,N'-dimethoxymethyl-2-oxohexahydropyrimidine, N,N'-dimethoxymethyl-2-oxo- imidazolidine, N,N'-dimethoxymethyl-4-oxo-tetrahydro-1,3,5-oxadiazine and N,N'-dimethoxymethyl-2-oxo-5,5-dimethyl-hexahydropyrimidine.
Claim 4
Dependent Claim
16 words
A molding composition as set forth in claim 1 wherein said alkoxymethyl urea is N,N'-dimethoxymethyl urea.
Claim 5
Dependent Claim
23 words
An improved molding composition as set forth in claim 1 where the amount of alkoxymethyl urea is from 0.5 to 2.5% by weight.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |