Patent US3853681A successfully refreshed from Google Patents.
US3853681A
Expired / Lapsed
US
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Laminated honeycomb structure and method of making same
Assignee: WR Grace and Co Conn
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Filing: 1970-12-02
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Granted: 1974-12-10
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Expires: 1990-12-02
Abstract
Abstract This invention relates to a method and means for laminating superimposed layers of the same or different material by adhering said layers with a novel curable liquid adhesive composition comprising a polyene and a polythiol which, on exposure to ionizing radiation or a free radical generating agent, cures to a solid adhesive under ambient conditions. The novel adhesive can be used in bonding structural cellular material such as honeycomb cores and facings.
Inventors
- 👤 C Kehr
- 👤 W Wszolek
- 👤 C Lundsager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:31
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B29; B29D; B29D99/00; B29D99/0089; B31; B31D; B31D3/00; B31D3/02; B31D3/0223; B31D3/0269; B32B27/00; B32B27/12; B32B37/00; B32B37/12; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/6715; C08G18/83; C08G18/834; C08G18/835; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08G75/12; C09; C09J; C09J175/00; C09J175/04; C09J175/14; B32B2250/00; B32B2250/40; B32B2305/00; B32B2305/02; B32B2305/024; B32B2315/00; B32B2315/08; B32B2315/085; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1003; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24165; Y10T428/24802; Y10T428/24851
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
THE PROCESS OF MAKING A HONEYCOMB STRUCTURE FROM A LAMINATED STACK OF WEB MATERIAL WHICH COMPRISES A. APPLYING TO SECTIONS OF THE WEB MATERIAL, LINES OF AN ADHESIVE COMPOSITION CONSISTING ESSENTIALLY OF A POLYENE CONTAINING AT LEAST TWO REACTIVE UNSATURATED CARBON TO CARBON BONDS PER MOLECULE, SAID POLYENE BEING THE TRIACRYLATE OF THE REACTION PRODUCTION OF TRIMETHYLOL PROPANE AND ETHYLENE OXIDE, AND A POLYTHIOL CONTAINING AT LEAST TWO THIOL GROUP PER MOLECULE, THE TOTAL COMBINED FUNCTIONALITY OF (A) THE REACTIVE UNSATURATED CARBON TO CARBON BONDS PER MOLECULE IN THE POLYENE AND (B) THE THIOL GROUPS PER MOLECULE IN THE POLYTHIOL BEING GREATER THAN 4, B. FORMING A PLURALITY OF SAID SECTIONS IN A STACK WITH SAID LINES OF ADHESIVE BETWEEN ADJACENT SECTIONS ARRANGED IN STAGGERED RELATIONSHIP; C. SUBJECTING SAID STACK TO IONIZING RADIATION AT A DOSE RATE IN THE RANGE OF 0.00001 TO 10.0 MEGARADS/SECOND TO CURE THE ADHESIVE AND BOND SAID SECTIONS AND D. EXPANDING SAID STACK TO FORM A HONEYCOMB STRUCTURE HAVING A PLURALITY OF HOLLOW CELLS.
Claim 2
Dependent Claim
169 words
THE PROCESS OF MAKING A HONEYCOMB STRUCTURE FROM A LAMINATED STACK OF WEB MATERIAL WHICH COMPRISES A. APPLYING TO SECTIONS OF THE WEB MATERIAL, LINES OF AN ADHESIVE COMPOSITION CONSISTING ESSENTIALLY OF A POLYENE CONTAINING AT LEAST TWO REACTIVE UNSATURATED CARBON TO CARBON BONDS PER MOLECULE, SAID POLYENE BEING THE TRIACRYLATE OF THE REACTION PRODUCTION OF TRIMETHYLOL PROPANE AND ETHYLENE OXIDE, AND A POLYTHIOL CONTAINING AT LEAST TWO THIOL GROUP PER MOLECULE, THE TOTAL COMBINED FUNCTIONALITY OF (A) THE REACTIVE UNSATURATED CARBON TO CARBON BONDS PER MOLECULE IN THE POLYENE AND (B) THE THIOL GROUPS PER MOLECULE IN THE POLYTHIOL BEING GREATER THAN 4, B. FORMING A PLURALITY OF SAID SECTIONS IN A STACK WITH SAID LINES OF ADHESIVE BETWEEN ADJACENT SECTIONS ARRANGED IN STAGGERED RELATIONSHIP; C. SUBJECTING SAID STACK TO IONIZING RADIATION AT A DOSE RATE IN THE RANGE OF 0.00001 TO 10.0 MEGARADS/SECOND TO CURE THE ADHESIVE AND BOND SAID SECTIONS AND D. EXPANDING SAID STACK TO FORM A HONEYCOMB STRUCTURE HAVING A PLURALITY OF HOLLOW CELLS.
Claim 3
Dependent Claim
172 words
A sandwich structure comprising a pair of surface sheets, a honeycomb core interposed between said surface sheets with the direction of the cells extending normal to the surface sheets, whereby the edges of the cells are opposite the inner surfaces of said surface sheets, adhesive means for bonding the edges of said honeycomb core to the respective surface sheets comprising an adhesive composition consisting essentially of a polyene containing at least two reactive unsaturated carbon to carbon bonds per molecule, said polyene being the triacrylate of the reaction product of trimethylol propane and ethylene oxide, and a polythiol containing at least two thiol groups per molecule, the total combined functionality of (a) the reactive unsaturated carbon to carbon bonds per molecule in the polyene and (b) the thiol groups per molecule in the polythiol being greater than 4; said adhesive composition on being subjected to ionizing radiation at a dose rate in the range 0.00001 to 10.0 megarads/second causing bonding of the edges of said honeycomb core to the respective surface sheets.
Claim 4
Dependent Claim
172 words
A sandwich structure comprising a pair of surface sheets, a honeycomb core interposed between said surface sheets with the direction of the cells extending normal to the surface sheets, whereby the edges of the cells are opposite the inner surfaces of said surface sheets, adhesive means for bonding the edges of said honeycomb core to the respective surface sheets comprising an adhesive composition consisting essentially of a polyene containing at least two reactive unsaturated carbon to carbon bonds per molecule, said polyene being the triacrylate of the reaction product of trimethylol propane and ethylene oxide, and a polythiol containing at least two thiol groups per molecule, the total combined functionality of (a) the reactive unsaturated carbon to carbon bonds per molecule in the polyene and (b) the thiol groups per molecule in the polythiol being greater than 4; said adhesive composition on being subjected to ionizing radiation at a dose rate in the range 0.00001 to 10.0 megarads/second causing bonding of the edges of said honeycomb core to the respective surface sheets.
Claim 5
Dependent Claim
23 words
maintaining said superposed honeycomb cores in contact for a time sufficient to cure the adhesive and effect bonding between said unexpanded honeycomb cores.
Claim 6
Dependent Claim
23 words
maintaining said superposed honeycomb cores in contact for a time sufficient to cure the adhesive and effect bonding between said unexpanded honeycomb cores.
Claim 7
Dependent Claim
13 words
The process of bonding at least two unexpanded honeycomb cores together which comprises
Claim 8
Dependent Claim
13 words
The process of bonding at least two unexpanded honeycomb cores together which comprises
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |