Patent US4294879A successfully refreshed from Google Patents.
US4294879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous insulation mat with anti-punking binder system
Assignee: GP Chemicals Equity LLC
•
Filing: 1980-12-04
•
Granted: 1981-10-13
•
Expires: 2000-12-04
Abstract
Abstract The present invention comprises a low-cost, convenient to use anti-punking binder system for use in bonding entangled masses of mineral fibers such as glass. The binder system comprises a phenolic-formaldehyde resin mixed with a water soluble urea-formaldehyde resin; the urea-formaldehyde resin content in the binder system comprising an amount of about 5 to 50% by weight of the binder solids content. The urea-formaldehyde resin comprises about 59% urea, about 19% formaldehyde and about 22% water by weight. Silane, ammonia and ammonium sulfate may also be added.
Inventors
- 👤 Patricia A. McHenry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:07
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/587; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663; Y10T442/00; Y10T442/60
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
Fibrous insulation comprising a mass of glass fibers bonded with a binder system in an amount which lies between about 1 to 20% loss-on-ignition, said binder comprising a water soluble phenolicformaldehyde resin mixed with a water soluble urea-formaldehyde resin, the urea-formaldehyde resin content in said binder system comprising an amount of about 5 to 50% by weight of the binder solids content, said urea-formaldehyde resin comprising about 59% urea, about 19% formaldehyde and about 22% water by weight.
Claim 2
Dependent Claim
78 words
Fibrous insulation comprising a mass of glass fibers bonded with a binder system in an amount which lies between about 1 to 20% loss-on-ignition, said binder comprising a water soluble phenolicformaldehyde resin mixed with a water soluble urea-formaldehyde resin, the urea-formaldehyde resin content in said binder system comprising an amount of about 5 to 50% by weight of the binder solids content, said urea-formaldehyde resin comprising about 59% urea, about 19% formaldehyde and about 22% water by weight.
Claim 3
Dependent Claim
29 words
The insulation of claim 1, wherein the urea-formaldehyde resin content in said binder comprises an amount of about 27% by weight of the solids content in said phenolic-formaldehyde resin.
Claim 4
Dependent Claim
62 words
The insulation of claims 1 or 2, wherein said binder system further comprises silane in an amount about .1 to 4% by weight based on the binder solids, ammonia in an amount of about 0 to 30% by weight based on the binder solids content and ammonium sulfate in an amount between about 0 to 6% by weight based on binder solids.
Claim 5
Dependent Claim
138 words
A process for mixing an anti-punk binder system and using it for bonding mineral fibers into an insulating mass, comprising: mixing said binder system by mixing a water soluble phenolicformaldehyde resin with a water soluble urea-formaldehyde resin, the urea-formaldehyde resin content in said binder system comprising an amount of about 5 to 50% by weight of the binder solids content, said urea-formaldehyde comprising about 59% urea, about 19% formaldehyde and about 22% water by weight, said method further comprising adding silane in an amount between about .1 to .4% by weight based on the binder solids, adding ammonia in an amount between about 0 to 30% by weight of the binder solids and ammonium sulfate in an amount between about 0 to 6% by weight of the binder solids and spraying said binder system onto said mineral fibers.
Claim 6
Dependent Claim
138 words
A process for mixing an anti-punk binder system and using it for bonding mineral fibers into an insulating mass, comprising: mixing said binder system by mixing a water soluble phenolicformaldehyde resin with a water soluble urea-formaldehyde resin, the urea-formaldehyde resin content in said binder system comprising an amount of about 5 to 50% by weight of the binder solids content, said urea-formaldehyde comprising about 59% urea, about 19% formaldehyde and about 22% water by weight, said method further comprising adding silane in an amount between about .1 to .4% by weight based on the binder solids, adding ammonia in an amount between about 0 to 30% by weight of the binder solids and ammonium sulfate in an amount between about 0 to 6% by weight of the binder solids and spraying said binder system onto said mineral fibers.
Claim 7
Dependent Claim
18 words
The process of claim 4, wherein the amonia is added to the binder system before the ammonium sulfate.
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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |