US3986988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making insulating materials of low combustibility on the basis of the foam-like urea formaldehyde resins
Assignee: Okresny Stavebno-Montazny Podnki
•
Filing: 1974-04-29
•
Granted: 1976-10-19
•
Expires: 1994-04-29
Abstract
Abstract There is provided a process for preparing insulating materials by first forming a foam product involving beating a mixture containing 5 to 15 parts by volume of water and 1 part by volume, of a keratin hydrolysate. To the foam thus prepared is added 1 to 80 parts by volume of a urea formaldehyde resin in a resol state and a setting agent. The mixture is then blended followed by the addition thereto of an inorganic and/or organic filler until the mixture assumes the consistency of a plastic mass. The plastic mass is then kneaded, poured into a mold, and then allowed to set and ripen.
Inventors
- 👤 Ladislav Sedlak, deceased
- 👤 heir by Dagmar Sedlakova
- 👤 heir by Hvezdoslava Hrdlickova
- 👤 Jozef Zapletal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:35
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; C08J9/0004; C08K; C08K5/00; C08K5/04; C08K5/09; C08J2361/00; C08J2361/20; C08J2361/22; C08J2361/24; Y; Y10; Y10S; Y10S264/00; Y10S264/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A process for producing insulating materials of low combustibility which comprises forming a foam product from 5 to 15 parts by volume water and 1 part by volume of a foam-forming keratin hydrolysate, adding to said foam 1 to 80 parts by volume urea formaldehyde resin in a resol state and a setting agent, blending the mixture, adding inorganic and/or organic fillers until the consistency of a plastic mass is obtained, and after thoroughly kneading the mass, pouring it into a mold and allowing it to set and ripen.
Claim 2
Dependent Claim
89 words
A process for producing insulating materials of low combustibility which comprises forming a foam product from 5 to 15 parts by volume water and 1 part by volume of a foam-forming keratin hydrolysate, adding to said foam 1 to 80 parts by volume urea formaldehyde resin in a resol state and a setting agent, blending the mixture, adding inorganic and/or organic fillers until the consistency of a plastic mass is obtained, and after thoroughly kneading the mass, pouring it into a mold and allowing it to set and ripen.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein the setting agent is citric acid.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein the setting agent is added to the starting materials during the preparation of the foam.
Claim 5
Dependent Claim
24 words
A process according to claim 1 wherein the inorganic fillers are selected from the group consisting of fibrous silicates, expanded perlite and pumice stone.
Claim 6
Dependent Claim
21 words
A process according to claim 1 wherein the organic fillers are celluloses or wastes resulting from the production of plastic masses.
References Cited (Backward Citations)
US2521582A
Cited
US3470115A
Cited
US3457199A
Cited
US3417037A
Cited
US3554936A
Cited
US3740355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |