US3861895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reducing smoke and dust in the process for manufacturing mineral wool
Assignee: Withrow Arthur C Co
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Filing: 1972-10-19
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Granted: 1975-01-21
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Expires: 1992-10-19
Abstract
Abstract Mineral wool fibres still hot from being formed by high speed centrifugation are coated with a composition comprising 1 to 30% of a non-ionic surfactant and 70 to 99% of a polyalkylene glycol having a viscosity in the range of 35 to 180,000 cs. at 100*F. As a result, smoke and dust is reduced, the fibres are annealed and a wetting action is imparted. The preferred surfactants are alkyl phenoxy polyethoxy ethanols.
Inventors
- 👤 John H Tarazi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:06
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
In a method in accordance with claim 1, wherein the polyalkylene glycol has a viscosity of 3,000 to 180,000 cs. at 100*F.
Claim 2
Dependent Claim
37 words
In a method in accordance with claim 1, wherein the treating composition is applied as a water solution comprising from 1 to 99% by weight of the composition and from 99 to 1% by weight of water.
Claim 3
Dependent Claim
34 words
In a method in accordance with claim 1, wherein the polyalkylene glycol is selected from the group consisting of polyethylene glycols, polypropylene glycols, and polyalkylene glycols derived from both ethylene oxide and propylene oxide.
Claim 4
Dependent Claim
57 words
In a method of making mineral wool by high-speed centrifugation of molten mineral to form initially hot mineral fibres, the fibres then being collected to form the wool, the improvement comprising: applying to the initially hot mineral wool fibres a treating composition, comprising from 30 to 1% by weight of a non-ionic surfactant, having the general structure
Claim 5
Dependent Claim
115 words
In a method of making mineral wool by high-speed centrifugation of molten mineral to form initially hot mineral fibres, the fibres then being collected to form the wool, the improvement comprising: applying to the initially hot mineral wool fibres a treating composition, comprising from 30 to 1% by weight of a non-ionic surfactant selected from the group consisting of alkylphenoxy polyethoxy ethanols, and from 70 to 99% by weight of a polyalkylene glycol having a viscosity in the range of from about 35 to about 180,000 cs. at 100*F, whereby dust generation created during the high temperature centrifugation for forming the mineral fibres from molten mineral is reduced or eliminated substantially without generation of smoke.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |