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US4916202A Expired / Lapsed US ⏱️ 0.0 years remaining

Epoxy resin

Assignee: University of Dayton
•
Filing: 1987-09-17
•
Granted: 1990-04-10
•
Expires: 2007-09-17
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Abstract

Abstract The present invention provides an epoxy resin of the formula <IMAGE> (I) <IMAGE> where A is selected from the group consisting of -C(CH3)2-, -C(CF3)2-, -S-, -SO2-, -CH2-, -CO-, -O-, and -C3H6-, and each B1, B2, B3, and B4 is independently selected from the group consisting of -H, -F, -Cl, -Br, -I, -CH2CH=CH2, -CH3, -C2H5, -C3H7, and -C4H9. The present invention also provides a curable composition comprising an epoxy resin of the foregoing formula (I) and an effective curing amount of a hardener for an epoxy resin. The moisture sensitivity of the cured castings and/or composites based on the epoxy resins is lower than known epoxy resin castings and/or composites that have comparable thermal stability, modulus, strength, processability, and toughness.

Inventors

  • 👤 John M. Butler
  • 👤 Richard P. Chartoff
  • 👤 James A. Harvey

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 17:15
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/36; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3227

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 30 words
An epoxy resin of the formula ##STR13## wherein A is --C(CH 3 ) 2 -- and B 1 , B 2 , B 3 , and B 4 are --H.
Claim 2
Dependent Claim 30 words
An epoxy resin of the formula ##STR13## wherein A is --C(CH 3 ) 2 -- and B 1 , B 2 , B 3 , and B 4 are --H.
Claim 3
Dependent Claim 29 words
An epoxy resin of the formula ##STR14## wherein A is --C(CF 3 ) 2 -- and B 1 , B 2 , B 3 and B 4 are --H.
Claim 4
Dependent Claim 29 words
An epoxy resin of the formula ##STR14## wherein A is --C(CF 3 ) 2 -- and B 1 , B 2 , B 3 and B 4 are --H.
Claim 5
Dependent Claim 45 words
A curable composition comprising an epoxy resin of the formula ##STR15## wherein A is --C(CH 3 ) 2 -- and B 1 , B 2 , B 3 , and B 4 and --H, and an effective curing amount of a hardener for epoxy resin.
Claim 6
Dependent Claim 45 words
A curable composition comprising an epoxy resin of the formula ##STR15## wherein A is --C(CH 3 ) 2 -- and B 1 , B 2 , B 3 , and B 4 and --H, and an effective curing amount of a hardener for epoxy resin.
Claim 7
Dependent Claim 43 words
A curable composition comprising an epoxy resin of the formula ##STR16## wherein A is --C(CF 3 ) 2 -- and B 1 , B 2 , B 3 and B 4 are --H, and an effective amount of a hardener for epoxy resin.
Claim 8
Dependent Claim 43 words
A curable composition comprising an epoxy resin of the formula ##STR16## wherein A is --C(CF 3 ) 2 -- and B 1 , B 2 , B 3 and B 4 are --H, and an effective amount of a hardener for epoxy resin.

References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-04-09 1993-10-09 1994-04-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-04-09 1997-10-09 1998-04-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-04-09 2001-10-09 2002-04-10 $7700.00 Window Closed / Lapsed

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