Patent US4391931A successfully refreshed from Google Patents.
US4391931A
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Capsules containing self-setting compositions and the compositions
Assignee: Individual
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Filing: 1981-08-10
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Granted: 1983-07-05
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Expires: 2001-08-10
Abstract
Abstract Water and a hydrated salt are both present to reduce the flammability of a flammable resin system, e.g. a capsule having two compartments each containing an interactive component and for use in e.g. a mine.
Inventors
- 👤 Jeffrey G. Haigh
- 👤 Leslie W. Cheriton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:05
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08J; C08J3/00; C08J3/24; C08J3/241; C08K3/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
119 words
A capsule containing in separate compartments the interactive components of a self-setting composition, one component comprising an unhardened resin and the other component comprising a hardener therefor, the capsule being rupturable to release the interactive components to intermix them and form the self-setting composition, at least one of the components beig flammable, both free water and hydrated salt being present, the free water or the hydrated salt or both being located in at least one of the components prior to the interaction thereof, the concentration of the free water and the hydrated salt being sufficient to supress the flame of the flammable component but still permitting the set composition to have a strength which exceeds 20 Newtons/mm 2 .
Claim 2
Dependent Claim
119 words
A capsule containing in separate compartments the interactive components of a self-setting composition, one component comprising an unhardened resin and the other component comprising a hardener therefor, the capsule being rupturable to release the interactive components to intermix them and form the self-setting composition, at least one of the components beig flammable, both free water and hydrated salt being present, the free water or the hydrated salt or both being located in at least one of the components prior to the interaction thereof, the concentration of the free water and the hydrated salt being sufficient to supress the flame of the flammable component but still permitting the set composition to have a strength which exceeds 20 Newtons/mm 2 .
Claim 3
Dependent Claim
23 words
A capsule according to claim 1, characterised in that the hydrated salt is one which releases water at a temperature below 150° C.
Claim 4
Dependent Claim
23 words
A capsule according to claim 2, characterised in that the hydrated salt is one which releases water at a temperature below 40° C.
Claim 5
Dependent Claim
29 words
A capsule according to claim 1, characterised in that the hydrated salt is selected from aluminium sulphate, sodium aluminium sulphate, potassium aluminium sulphate, sodium sulphate, gypsum and copper sulphate.
Claim 6
Dependent Claim
35 words
A capsule according to claim 1, characterised in that the hydrated salt is present in one or each of the interactive components in a concentration of from 10% to 50% by weight of the component.
Claim 7
Dependent Claim
46 words
A capsule according to claim 1, characterised in that free water is present in one or each of the interactive components in a concentration of below the level at which it will substantially weaken the strength of the set composition or substantially affect the viscosity thereof.
Claim 8
Dependent Claim
36 words
A capsule according to claim 6, characterised in that one or each interactive component includes a filler selected from ground firebrick or limestone, sand or the like and the free water is absorbed into the filler.
Claim 9
Dependent Claim
31 words
A capsule according to claim 6 or 7, characterised in that the viscosity of the component is about 5000 poise at 20° C. when measured on a Brookfield RVF Helipath Viscometer.
Claim 10
Dependent Claim
21 words
A capsule according to claim 1, characterised in that the concentration of water is sufficient to extinguish flame within 5 seconds.
Claim 11
Dependent Claim
22 words
A capsule according to claim 1, characterised by the presence of a film forming ingredient to seal drops of burning flammable material.
Claim 12
Dependent Claim
16 words
A capsule according to claim 10, characterised in that the film forming ingredient is a wax.
Claim 13
Dependent Claim
106 words
A self-setting composition comprising first and second components, the first component comprising an unhardened resin and the second component comprising a hardener therefor, the two components being intermixed to form said self-setting composition, at least one of the components being flammable, both free water and hydrated salt being present, the free water or the hydrated salt or both being associated with at least one of the components prior to intermixing, the concentration of the free water and the hydrated salt being sufficient to suppress the flame of the flammable component but still permitting the set composition to have a strength which exceeds 20 Newtons/mm 2 .
Claim 14
Dependent Claim
106 words
A self-setting composition comprising first and second components, the first component comprising an unhardened resin and the second component comprising a hardener therefor, the two components being intermixed to form said self-setting composition, at least one of the components being flammable, both free water and hydrated salt being present, the free water or the hydrated salt or both being associated with at least one of the components prior to intermixing, the concentration of the free water and the hydrated salt being sufficient to suppress the flame of the flammable component but still permitting the set composition to have a strength which exceeds 20 Newtons/mm 2 .
Claim 15
Dependent Claim
19 words
A composition according to claim 12, characterised in that the hydrated salt is present in one dry interactive component.
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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |