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US4425440A
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Flame retardant thermally insulating material
Assignee: Shell USA Inc
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Filing: 1982-09-03
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Granted: 1984-01-10
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Expires: 2002-09-03
Abstract
Abstract The invention provides a flame retardant thermally insulating material which comprises cellular polymer particles and fly ash bound into a coherent mass by a dried synthetic polymer latex binder, and a process for providing between at least two spaced-apart surfaces a flame retardant thermal insulation in the form of such a material. The process has particularly useful application in the field of roof insulation in sloping roofs having spaced-apart outer and inner layers.
Inventors
- 👤 Roel Bloembergen
- 👤 Jan A. Verhave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:30
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J9/236; C08J9/32; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
34 words
A thermally insulating material, suitable for injection into cavities, which comprises cellular polymer particles, fly ash, a synthetic polymer latex binder, a foaming agent, a foam stabilizer, a thickening agent and a coalescing agent.
Claim 2
Dependent Claim
34 words
A thermally insulating material, suitable for injection into cavities, which comprises cellular polymer particles, fly ash, a synthetic polymer latex binder, a foaming agent, a foam stabilizer, a thickening agent and a coalescing agent.
Claim 3
Dependent Claim
14 words
A material according to claim 1 wherein the thickening agent is a hydroxymethyl cellulose.
Claim 4
Dependent Claim
13 words
A material according to claim 1 wherein the coalescing agent is a phthalate.
Claim 5
Dependent Claim
54 words
A process for providing a flame retardant thermal insulation between at least two spaced-apart surfaces having an air-filled cavity therebetween, which process comprises introducing into the cavity a foamed mixture of a synthetic polymer latex binder, a coalescing agent, a thickening agent, a foam stabilizer, a foaming agent, fly ash and cellular polymer particles.
Claim 6
Dependent Claim
54 words
A process for providing a flame retardant thermal insulation between at least two spaced-apart surfaces having an air-filled cavity therebetween, which process comprises introducing into the cavity a foamed mixture of a synthetic polymer latex binder, a coalescing agent, a thickening agent, a foam stabilizer, a foaming agent, fly ash and cellular polymer particles.
Claim 7
Dependent Claim
13 words
The process according to claim 4, wherein the coalescing agent is a phthalate.
Claim 8
Dependent Claim
17 words
The process according to claim 4 or 5, wherein the thickening agent is a hydroxymethylcellulose thickening agent.
Claim 9
Dependent Claim
94 words
The process according to claim 4, wherein amounts of synthetic polymer latex binder, coalescing agent, thickening agent, foam stabilizer and foaming agent are used to provide 90 to 100 parts by weight of coalescing agent, 1.8 to 2.5 parts by weight of thickening agent, 0.47 to 0.81 parts by weight of foam stabilizer and 3.1 to 5.4 parts by weight of foaming agent per 100 parts by weight of foaming cellular polymer particles, and the overall water content of the foamed mixture is in the range of about 100 to 300 parts by weight.
Claim 10
Dependent Claim
56 words
The process according to claim 4 wherein a liquid mixture containing the synthetic polymer latex binder, the coalescing agent, the thickening agent, the foam stabilizer and the foaming agent is aerated to produce a foam, fly ash is then added with mixing and thereafter the cellular polymer particles are mixed in to form the foamed mixture.
Claim 11
Dependent Claim
29 words
The process accroding to claim 8, wherein the liquid mixture is aerated until the volume of the foam is about 80% of the volume of the cellular polymer particles.
Claim 12
Dependent Claim
24 words
The process according to claim 4, wherein the foamed mixture is introduced into a cavity between sloping outer and inner layers of a roof.
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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |