Patent US4268574A successfully refreshed from Google Patents.
US4268574A
Expired / Lapsed
US
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Prefabricated self-supporting panels and manufacture process thereof
Assignee: Pantec SRL
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Filing: 1979-07-13
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Granted: 1981-05-19
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Expires: 1999-07-13
Abstract
Abstract Prefabricated self-supporting panels having at least two outer layers and one inner layer provided with a foamed mixture, wherein the inner layer comprises unsaturated polyester resins, hollow microspheres of aluminum phyllosilicate having an average diameter of 150 microns and density of 0.7 kg/cu.dm., and a coupling agent of the organofunctional silane type. The process for the manufacture of these panels has also been described.
Inventors
- 👤 Paolo Peccenini
- 👤 Paolo Romini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:54
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/58; B29C70/66; B32; B32B; B32B5/00; B32B5/18; B32B27/00; B32B27/06; B32B27/065; B32B27/18; B32B27/36; C; C08; C08J; C08J9/00; C08J9/32; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/205; B29K; B29K2067/00; B29K2067/06; B29K2105/00; B29K2105/06; B29K2105/16; B29K2105/165; B29K2709/00; B29K2709/02; B29L; B29L2007/00; B29L2007/002; B32B2262/00; B32B2262/10; B32B2262/101; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0264; B32B2305/00; B32B2305/08; C08J2367/00; C08J2367/06; Y; Y10; Y10S; Y10S264/00; Y10S264/06; Y10S264/17; Y10S264/39; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249969; Y10T428/249971; Y10T428/249974; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
142 words
A process of manufacturing prefabricated self-supporting panels which consists of forming a laminate having at least two outer layers and at least one inner layer, said at least one intermediate layer being made of a foamed mixture of (a) an unsaturated polyester resin, (b) hollow microspheres of aluminum phyllosilicate of an average diameter of 150 microns and density of 0.7 kg/cu.dm in a proportion of 5 to 20% by weight based on the unsaturated polyester resin, and (c) a coupling agent which comprises at least one organo-functional silane, in the proportion of 0.1 to 5.0% by weight based on the unsaturated polyester resin and the outer layers comprise a mixture of unsaturated polyester resin, granite grit and an organo-functional silane, the latter in a proportion of 0.1 to about 5.0% with respect to the unsaturated polyester resin, and allowing hardening to occur.
Claim 2
Dependent Claim
142 words
A process of manufacturing prefabricated self-supporting panels which consists of forming a laminate having at least two outer layers and at least one inner layer, said at least one intermediate layer being made of a foamed mixture of (a) an unsaturated polyester resin, (b) hollow microspheres of aluminum phyllosilicate of an average diameter of 150 microns and density of 0.7 kg/cu.dm in a proportion of 5 to 20% by weight based on the unsaturated polyester resin, and (c) a coupling agent which comprises at least one organo-functional silane, in the proportion of 0.1 to 5.0% by weight based on the unsaturated polyester resin and the outer layers comprise a mixture of unsaturated polyester resin, granite grit and an organo-functional silane, the latter in a proportion of 0.1 to about 5.0% with respect to the unsaturated polyester resin, and allowing hardening to occur.
Claim 3
Dependent Claim
16 words
A process according to claim 1, wherein the organo-functional silane consists essentially of vinylsilane or methacrylsilane.
Claim 4
Dependent Claim
34 words
A process according to claim 1, wherein a filler of granular foamed materials of foamed clay, having an average diameter of 15-20 mm and density of 0.35 kg/cu.dm. is added to said inner layer.
Claim 5
Dependent Claim
22 words
A process according to claim 3 wherein the foamed clay is pretreated with 0.1-1.0% aqueous solution of an organo-silane and then dried.
Claim 6
Dependent Claim
22 words
The process according to claim 1 wherein the foamed mixture of said intermediate layer has specific gravity not less than 0.12 kg/cu.dm.
Claim 7
Dependent Claim
17 words
The process according to claim 1 wherein the unsaturated polyester resin is based on hexachloroendomethylene tetrahydrophthalic anhydride.
Claim 8
Dependent Claim
23 words
A process according to claim 6 wherein the unsaturated polyester resin is of the type resistant to flame and high temperature heat distortion.
Claim 9
Dependent Claim
15 words
A process according to claim 1 wherein the outer layer additionally contains short glass fibers.
Claim 10
Dependent Claim
20 words
The process according to claim 8 wherein the fiberglass-reinforced plastic reinforcement is incorporated into the outer layer prior to hardening.
Claim 11
Dependent Claim
15 words
The process according to claim 1 wherein said panels are flat and free from distortion.
Claim 12
Dependent Claim
32 words
The process according to claim 1 wherein the unsaturated polyester resin in said at least one outer layer is different from the unsaturated polyester resin in said at least one intermediate layer.
Claim 13
Dependent Claim
107 words
A prefabricated self-supporting panel which consists of a laminate having at least two outer layers and at least one inner layer, said at least one inner layer being made of a foamed mixture comprising: (a) an unsaturated polyester resin, (b) hollow microspheres of aluminum phyllosilicate having an average diameter of 150 microns and a density of 0.7 kg/dm 3 in the proportion of 5-20% by weight based on the unsaturated polyester resin, and granulated material containing foamed clay having an average diameter of 15 to 20 mm and a specific gravity of 0.35 kg/dm 3 , and (c) an organo-functional silane derivative in the proportion of 0.1-5%.
Claim 14
Dependent Claim
107 words
A prefabricated self-supporting panel which consists of a laminate having at least two outer layers and at least one inner layer, said at least one inner layer being made of a foamed mixture comprising: (a) an unsaturated polyester resin, (b) hollow microspheres of aluminum phyllosilicate having an average diameter of 150 microns and a density of 0.7 kg/dm 3 in the proportion of 5-20% by weight based on the unsaturated polyester resin, and granulated material containing foamed clay having an average diameter of 15 to 20 mm and a specific gravity of 0.35 kg/dm 3 , and (c) an organo-functional silane derivative in the proportion of 0.1-5%.
Claim 15
Dependent Claim
15 words
A panel according to claim 12 wherein the organic silane derivative is vinylsilane and methacrylsilane.
Claim 16
Dependent Claim
39 words
A panel according to claim 12 wherein foamed clay is added to said microspheres, said foamed clay having an average diameter of 20 mm, said clay being pre-treated with 0.1-1.0% aqueous solution of an organo silane and then dried.
Claim 17
Dependent Claim
30 words
A panel according to claim 12 wherein at least one of the outer layers is formed of a mixture of an unsaturated polyester resin, granite grit and an organo-functional silane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |