US4451310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of lightweight, insulating and semirigid or rigid elements
Assignee: TRANSFORMATION ET D'APPLICATIONS MODERNES A L'INDUSTRIE ET AU COMMERCE "TRAMICO" Ste
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Filing: 1982-04-09
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Granted: 1984-05-29
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Expires: 2002-04-09
Abstract
Abstract A process for preparing light-weight, insulating and semi-rigid or rigid elements, essentially comprises impregnating a porous supple material having an internal structure with preferentially open cells, with the desired quantity of a solution of a compound selected from the group comprising isocyanates, and having consequently in its formula at least a --NCO group, the material optionally having the final shape which is to be obtained, then proceeding with reticulation of the compound after reacting it with water giving a derivative of urea or biuret.
Inventors
- 👤 Jean-Claude Lairloup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C08J2375/00; C08J2375/04; C08J2475/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
103 words
A process for preparing lightweight, insulating and semi-rigid or rigid elements, of the type including panels or parts of variable shapes or thicknesses comprising impregnating a supple porous material having an inner structure with open cells, with a desired quantity of an isocyanate compound having at least one --NCO group, then contacting said isocyanate impregnated supple porous material with water, whereby said water and said isocyanate begin to react, the reaction giving a derivative of urea or biuret, then accelerating the reaction of said isocyanate compound with water by heating, and shaping under pressure the impregnated porous material to provide its final shape.
Claim 2
Dependent Claim
103 words
A process for preparing lightweight, insulating and semi-rigid or rigid elements, of the type including panels or parts of variable shapes or thicknesses comprising impregnating a supple porous material having an inner structure with open cells, with a desired quantity of an isocyanate compound having at least one --NCO group, then contacting said isocyanate impregnated supple porous material with water, whereby said water and said isocyanate begin to react, the reaction giving a derivative of urea or biuret, then accelerating the reaction of said isocyanate compound with water by heating, and shaping under pressure the impregnated porous material to provide its final shape.
Claim 3
Dependent Claim
17 words
A continuous process according to claim 1, wherein said heating and said shaping are carried out simultaneously.
Claim 4
Dependent Claim
38 words
A process according to claim 1, wherein, following said impregnation of said supple porous material with said isocyanate and before said contact with water, excess isocyanate beyond the desired quantity is expressed from said impregnated supple porous material.
Claim 5
Dependent Claim
23 words
A process according to claim 1, wherein said isocyanate compound is impregnated into said supple porous material in the form of a solution.
Claim 6
Dependent Claim
16 words
A process according to claim 1, wherein said porous supple material is open cell polyether foam.
Claim 7
Dependent Claim
18 words
A process according to claim 1, wherein said shaping forms the impregnated material into an automobile roof panel.
Claim 8
Dependent Claim
16 words
A process according to claim 1, wherein said shaping is effected between male and female dies.
Claim 9
Dependent Claim
47 words
A process according to claim 1, wherein, after said contact with water to initiate said reaction, fibrous material with distinct fibers is deposited, on one or both faces of the porous element, and said isocyanate compound further serves as a bonding or embedding agent for said fibers.
Claim 10
Dependent Claim
27 words
A process according to claim 8, wherein a plastic film is fed over said fibers and is united thereto, said isocyanate compound serving as a bonding agent.
Claim 11
Dependent Claim
29 words
A process according to claim 9, wherein unweft fabrics are applied to the two faces of the resultant product after application of the plastic film and before said pressing.
Claim 12
Dependent Claim
22 words
A process according to claim 1, wherein said isocyanate compound is admixed with an accelerator for increasing the rate of said reaction.
Claim 13
Dependent Claim
15 words
A process according to claim 1, wherein said isocyanate compound has mixed therewith an amine.
Claim 14
Dependent Claim
16 words
A process according to claim 1, wherein said isocyanate compound has mixed therewith a silicone material.
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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |