US4394337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal insulating body and a process for making the same
Assignee: Gruenzweig und Hartmann und Glasfaser AG
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Filing: 1980-10-14
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Granted: 1983-07-19
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Expires: 2000-10-14
Abstract
Abstract A thermal insulating body or shape is made up of highly dispersed insulating material together with mineral fiber wool and of opacifier together with a binder for curing. The binder, which is evenly distributed in a first-stage mix with a dispersant, is present in a finely dispersed condition in the insulating material, the corners and edges of the insulating material being able to undergo cross-linking with the binder by heat processing.
Inventors
- 👤 Hans Kummermehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:14
CPC Classifications
C; C04; C04B; C04B28/00; F; F16; F16L; F16L59/00; F16L59/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
92 words
A process for making a thermal insulating body, comprising, forming a first admixture of a binder and a dispersant, wherein the dispersant is present in an amount of 0.5 to 20% by weight of the binder and wherein the particle size of the binder is generally 1 micron or less; mixing the first admixture with a highly dispersed insulating material to form a second admixture; and then pressing and curing the second admixture, by application of heat, so that the edges and corners of the insulating material undergo cross-linking with the binder.
Claim 2
Dependent Claim
92 words
A process for making a thermal insulating body, comprising, forming a first admixture of a binder and a dispersant, wherein the dispersant is present in an amount of 0.5 to 20% by weight of the binder and wherein the particle size of the binder is generally 1 micron or less; mixing the first admixture with a highly dispersed insulating material to form a second admixture; and then pressing and curing the second admixture, by application of heat, so that the edges and corners of the insulating material undergo cross-linking with the binder.
Claim 3
Dependent Claim
14 words
The process according to claim 1, wherein the binder is soda or sodium sulfate.
Claim 4
Dependent Claim
18 words
The processes according to claim 1, wherein the dispersant is hydrophobized silica, pyrogenic silica, polytetrafluoroethylene or mixtures thereof.
Claim 5
Dependent Claim
12 words
The process according to claim 1, wherein the dispersant is hydrophobized silica.
Claim 6
Dependent Claim
21 words
The process according to claim 3, wherein the dispersant is present in an amount of 5-10% by weight of the binder.
Claim 7
Dependent Claim
49 words
The process according to claim 1, further comprising adding to said second admixture an opacifier selected from the group consisting of graphite; carbon black; oxides of titanium; chromium oxide; manganese oxide; iron oxide; carbides of silicon; boron; tantalum; tungsten or mixtures thereof; aluminum; tungsten; silicon; zircon; and lead monoxide.
Claim 8
Dependent Claim
27 words
The process according to claim 1, wherein the particle sizes of the binder, the dispersant, the insulating material and the opacifier are all less than 1 micron.
Claim 9
Dependent Claim
21 words
The process according to claim 1, wherein ratio of binder to insulating material is within the range of 2:98 to 30:70.
Claim 10
Dependent Claim
16 words
The process according to claim 8, wherein the ratio of binder to insulating material is 10:90.
Claim 11
Dependent Claim
21 words
The process according to claim 1, wherein the curing is conducted by heating at a temperature of 500° to 700° C.
Claim 12
Dependent Claim
17 words
The process according to claim 1, wherein curing is conducted in a high frequency or microwave oven.
Claim 13
Dependent Claim
67 words
The process according to claim 1, further comprising the steps of dividing said second admixture into a first portion and a second portion; forming a first layer of said first portion; laying down upon said first layer, a second layer comprising insulating material; laying down upon said second layer, a third layer formed from said second portion; and then pressing and curing the so-formed three layer composite.
Claim 14
Dependent Claim
17 words
The process according to claim 1, wherein the insulating material comprises mineral fibers containing a cured binder.
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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |