US4879066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant additives and their uses
Assignee: CEEPREE PRODUCTS Ltd
•
Filing: 1988-04-11
•
Granted: 1989-11-07
•
Expires: 2008-04-11
Abstract
Abstract A composition comprising two or more frits of different melting temperatures and optionally one or more ceramic material or basalt or intumescent substance is provided that may be added to a variety of materials to provides or enhance fire resistance. Such materials include phenolic and polyester resins and sodium silicate.
Inventors
- 👤 Geoffrey Crompton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:38
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/02; C08; C08K; C08K3/00; C08K3/01; C08K3/016; C09K21/14
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
60 words
A composition for providing or enhancing the fire resistance of a material comprising: a first frit having a relatively low melting point; and at least one other devitrifying frit having a relatively high melting point compared to the melting point of said first frit, said frits melting progressively under fire conditions to provide a fused protective layer for said material.
Claim 2
Dependent Claim
60 words
A composition for providing or enhancing the fire resistance of a material comprising: a first frit having a relatively low melting point; and at least one other devitrifying frit having a relatively high melting point compared to the melting point of said first frit, said frits melting progressively under fire conditions to provide a fused protective layer for said material.
Claim 3
Dependent Claim
13 words
A composition as claimed in claim 1 further comprising ceramic fibres or powder.
Claim 4
Dependent Claim
13 words
A composition as claimed in claim 1 further comprising basalt fibres or powder.
Claim 5
Dependent Claim
12 words
A composition as claimed in claim 1, further comprising an intumescent substance.
Claim 6
Dependent Claim
22 words
A composition as claimed in claim 4 wherein the intumescent substance is alumina trihydrate, hydrated magnesium calcium carbonate or a mixture thereof.
Claim 7
Dependent Claim
26 words
A composition as claimed in claim 1 wherein said first frit and said high melt devitrifying frit are in a weight ratio of 1:9 to 1:1.
Claim 8
Dependent Claim
22 words
A composition as claimed in claim 6, wherein the weight ratio of low melt frit to high melt frit is about 3:7.
Claim 9
Dependent Claim
38 words
A composition as claimed in claim 1 including an intumescent substance wherein the amount of frits is in the range of 15 to 50% by weight and the amount of intumescent substance is 85 to 50% by weight.
Claim 10
Dependent Claim
11 words
A composition as claimed in claim 6 further comprising sodium silicate.
Claim 11
Dependent Claim
27 words
A composition as claimed in claim 9, wherein the ratio of total frits and intumescent substance to sodium silicate is in the range of 3:7 to 1:1.
Claim 12
Dependent Claim
11 words
A composition as claimed in claim 6 further comprising phenolic resin.
Claim 13
Dependent Claim
11 words
A composition as claimed in claim 6 further comprising polyester resin.
Claim 14
Dependent Claim
21 words
A composition as claimed in claim 1 further comprising a char agent, ammonium polyphosphate, sodium silicate and an inorganic gelling agent.
Claim 15
Dependent Claim
20 words
A composition as claimed in claim 1 further comprising a char agent, ammonium polyphosphate, polyvinylacetate and an inorganic gelling agent.
Claim 16
Dependent Claim
33 words
A composition as claimed in claim 1 wherein said first frit has a melting point between 300°-500° C. and said at least one other devitrifying frit has a melting point between 600°-800° C.
Claim 17
Independent Claim
68 words
A method of providing or enhancing the fire resistance of a material or composition comprising adding thereto a composition including a first frit having a relatively low melting point and a second devitrifying frit having a relatively high melting point compared with said first frit so that under fire conditions the frits melt progressively to provide a fused protective layer for said material or composition to be protected.
Claim 18
Independent Claim
68 words
A method of providing or enhancing the fire resistance of a material or composition comprising adding thereto a composition including a first frit having a relatively low melting point and a second devitrifying frit having a relatively high melting point compared with said first frit so that under fire conditions the frits melt progressively to provide a fused protective layer for said material or composition to be protected.
Claim 19
Dependent Claim
75 words
A composition for providing or enhancing the fire resistance of a material comprising: a first frit having a relatively low melting point; a second frit having a melting point higher than said first frit; and at least one other frit having a melting point higher than said second frit, at least one of said frits being a devitrifying frit, said frits melting progressively under fire conditions to provide a fused protective layer for said material.
Claim 20
Dependent Claim
75 words
A composition for providing or enhancing the fire resistance of a material comprising: a first frit having a relatively low melting point; a second frit having a melting point higher than said first frit; and at least one other frit having a melting point higher than said second frit, at least one of said frits being a devitrifying frit, said frits melting progressively under fire conditions to provide a fused protective layer for said material.
References Cited (Backward Citations)
US31428A
Cited
US32131A
Cited
SU356254A1
Cited
FR1595989A
Cited
DE1957622A1
Cited
US4084975A
Cited
US4190698A
Cited
US4196242A
Cited
US4189619A
Cited
US4273821A
Cited
USRE31428E
Cited
USRE32131E
Cited
DE3306107A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |