US5397645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire resistance comprising an epoxy resin and a boron compound
Assignee: Pilkington Group Ltd
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Filing: 1992-02-19
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Granted: 1995-03-14
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Expires: 2012-02-19
Abstract
Abstract A reaction mixture for preparation of a fire resistant composition comprising an epoxy resin, a curing agent for said resin and a boron compound which is not a curing agent for the epoxy resin, the reaction mixture being translucent such that the reaction mixture cures to a translucent reaction product. The invention further provides a method of producing a fire resistant laminate in which the cured reaction product of a boron compound containing epoxy resin is used as an interlayer between two translucent panes and to a translucent fire resistant laminate.
Inventors
- 👤 Karikath S. Varma
- 👤 David P. Parkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:05
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/38; B32B17/00; B32B17/06; B32B17/069; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10045; B32B17/10165; B32B17/10311; B32B17/1055; B32B17/10733; B32B27/18; B32B27/26; C; C08; C08K; C08K5/00; C08K5/55; C09; C09K; C09K21/00; C09K21/06; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2307/40; B32B2307/414; B32B2363/00; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31525
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
49 words
A translucent fire-resistant laminate including two translucent panes bonded to a translucent interlayer, said interlayer being the reaction product of a reaction mixture comprising an epoxy resin, a curing agent for said resin and an organoboron compound which does not function as a curing agent for the epoxy resin.
Claim 2
Dependent Claim
49 words
A translucent fire-resistant laminate including two translucent panes bonded to a translucent interlayer, said interlayer being the reaction product of a reaction mixture comprising an epoxy resin, a curing agent for said resin and an organoboron compound which does not function as a curing agent for the epoxy resin.
Claim 3
Dependent Claim
22 words
A laminate as claimed in claim 1 wherein the organoboron compound is a sterically hindered boroester having a plurality of borate groups.
Claim 4
Dependent Claim
64 words
A laminate as claimed in claim 1 wherein the organoboron compound is a sterically hindered boron anhydride of formula ##STR2## wherein each R is a radical containing 2 to 8 carbon atoms; wherein the R groups may be the same or different radicals; and with the proviso that the Rs may together form, with the --O--B--O-- sequence from which they depend, a heterocyclic ring.
Claim 5
Dependent Claim
20 words
A laminate according to claim 1 wherein the laminate comprises two panes of annealed glass bonded together by the interlayer.
Claim 6
Dependent Claim
27 words
A laminate according to claim 4 wherein the two panes are each of annealed glass about 3 mm thick and the interlayer is about 2.8 mm thick.
Claim 7
Dependent Claim
18 words
A laminate according to claim 1 wherein the laminate comprises two multi-laminar pieces bonded together by the interlayer.
Claim 8
Dependent Claim
25 words
A laminate according to claim 6 wherein each multi-laminar piece comprises at least four panes of annealed glass separated by respective layers of intumescent material.
Claim 9
Dependent Claim
32 words
A laminate according to claim 7 wherein each multi-laminar piece comprises four panes of annealed glass each about 2.8 mm thick and three layers of intumescent material each about 1.4 mm thick.
Claim 10
Dependent Claim
43 words
A laminate according to claim 7 wherein each multi-laminar piece comprises four panes of annealed glass each about 2.8 mm thick, three outer layers of intumescent material each about 1.4 mm thick and an inner layer of intumescent material about 2.8 mm thick.
Claim 11
Dependent Claim
16 words
A laminate according to claim 7 where the intumescent material is sodium silicate or aluminum phosphate.
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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) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |