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US3900449A Expired / Lapsed US ⏱️ 0.0 years remaining

Storage-stable and thermosetting mixtures

Assignee: Novartis Corp
•
Filing: 1973-06-14
•
Granted: 1975-08-19
•
Expires: 1993-06-14
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Abstract

Abstract Mixtures which on curing give moulded materials of good electrical properties and high resistance to heat-aging, and which are characterised in that they contain a) N,N''-bis-imides of maleic acid, dimethylmaleic acid, citraconic acid or itaconic acid and b) dimeric or oligomeric halogen-containing bis(cyclopentadienyl) compounds such as, for example, oligomeric Alpha , Alpha ''-bis-(cyclopentadienyl)-2,3,5,6-tetrachloro-pxylene, optionally mixed with dimeric or oligomeric halogen-free bis-(cyclopentadienyl) compounds such as, for example, hexamethylene-bis-(cyclopentadiene). The mixtures are suitable for the manufacture of moulded materials of all kinds, especially for the manufacture of high quality insulating material.

Inventors

  • 👤 Heinz Rembold
  • 👤 Theobald Haug
  • 👤 Sigfried Wyler
  • 👤 Jurg Kiefer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 17:08
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; C; C08; C08G; C08G73/00; C08G73/06; C08G73/0605; C08G73/0616; B32B5/02; C08G73/0622; C08G73/0633; C08G73/10; C08G73/12; B32B38/00; B32B2038/0052; B32B2038/0076; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/10; B32B2262/101

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 20 words
STORAGE-STABLE, THERMOSETTING MIXTURES WHICH ARE CHARACTERISED IN THAT THEY CONTAIN (A) N,N''-BIS-IMIDES OF UNSATURATED DICARBOXYLIC ACIDS OF THE GENERAL FORMULA
Claim 2
Dependent Claim 20 words
STORAGE-STABLE, THERMOSETTING MIXTURES WHICH ARE CHARACTERISED IN THAT THEY CONTAIN (A) N,N''-BIS-IMIDES OF UNSATURATED DICARBOXYLIC ACIDS OF THE GENERAL FORMULA
Claim 3
Dependent Claim 28 words
Mixtures according to claim 1, characterised in that they contain (a) N,N''-bis-imides of the formula I in which A represents an unsubstituted or chlorine-substituted radical of the formula
Claim 4
Dependent Claim 15 words
Mixtures according to claim 1, characterised in that the molar ratio is 1:2 to 2:1.
Claim 5
Dependent Claim 18 words
Mixtures according to claim 1, characterised in that they contain N,N''-4,4''-diphenylmethane-bis-maleimide as the N,N''-bis-imide of the formula I.
Claim 6
Dependent Claim 18 words
Mixtures according to claim 1, characterised in that they contain N,N''-4,4''-3,3''-dichlorodiphenylmethane-bis-maleimide as the N,N''-bis-imide of the formula I.
Claim 7
Dependent Claim 18 words
Mixtures according to claim 1, characterised in that they contain N,N''-4,4''-diphenyl-ether-bis-maleimide as the N,N''-bis-imide of the formula I.
Claim 8
Dependent Claim 25 words
Mixtures according to claim 1, characterised in that they contain oligomeric Alpha , Alpha ''-bis-(cyclopentadienyl)-2,3,5, 6-tetrachloro-p-xylene as the halogen-containing bis-(cyclopentadienyl) compound of the formula II.
Claim 9
Dependent Claim 20 words
Mixtures according to claim 1, characterised in that they contain oligomeric 1,6-hexamethylene-bis-cyclopentadiene as the bis-(cyclopentadienyl) compound of the formula III.

References Cited (Backward Citations)

US2726232A Cited
US3188303A Cited
US3236916A Cited
US3322572A Cited
US3462407A Cited
US3445482A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-08-18 1979-02-17 1979-08-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-08-18 1983-02-17 1983-08-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-08-18 1987-02-17 1987-08-19 $7700.00 Window Closed / Lapsed

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