US3915772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the improvement of adhesion of protective layers to phenolic resin foams
Assignee: Dynamit Nobel AG
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Filing: 1972-09-22
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Granted: 1975-10-28
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Expires: 1992-09-22
Abstract
Abstract Improved shaped articles, particularly sheets or slabs, of phenolic resin foam having a covering material adhered to at least one side thereof which covering material is a fibercontaining, porous and water vapor permeable material which has impregnated into at least the side thereof to be adhered to the foam: phenolaldehyde liquid condensation product; or solutions or dispersions of polyamides, polybutadienes and/or polyvinyl acetal.
Inventors
- 👤 Franz Weissenfels
- 👤 Hans Junger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/365; C08J9/04; C08J9/12; C08J9/14; C08J9/141; C08J2361/00; Y; Y10; Y10S; Y10S264/00; Y10S264/02; Y10S521/00; Y10S521/918; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
87 words
A PROCESS OF FORMING A COMPOSITE LAMINATE OF A HARDENED PHENOLIC RESIN FOAM AND A FIBER CONTAINING WATER VAPOR IMPERMEABLE COVERING MATERIAL WHICH COMPRISES: A. RAPIDLY FOAMING A LIQUID PHENOL-ALDEHYDE CONDENSATION PROSUCT WHICH CONTAINS A DEFOAMING AGENT IN ITS COMPOSITION BELOW A COVERING MATERIAL TO BE IMPREGNATED THEREBY IMPREGNATING SAID COVERING MATERIAL, B. COLLASPING THE INITIAL FOAM SO FORMED, C. FOAMING THE SO CALLAPSED FOAM WHEREBY THE PHENOLIC RESIN FOAM PRODUCED BY THE SECOND FOAMING BONDS TO COVERING MATEIAL, AND D. HARDENNG SAID FOAM COVERING MATERIAL COMPOSITE.
Claim 2
Dependent Claim
87 words
A PROCESS OF FORMING A COMPOSITE LAMINATE OF A HARDENED PHENOLIC RESIN FOAM AND A FIBER CONTAINING WATER VAPOR IMPERMEABLE COVERING MATERIAL WHICH COMPRISES: A. RAPIDLY FOAMING A LIQUID PHENOL-ALDEHYDE CONDENSATION PROSUCT WHICH CONTAINS A DEFOAMING AGENT IN ITS COMPOSITION BELOW A COVERING MATERIAL TO BE IMPREGNATED THEREBY IMPREGNATING SAID COVERING MATERIAL, B. COLLASPING THE INITIAL FOAM SO FORMED, C. FOAMING THE SO CALLAPSED FOAM WHEREBY THE PHENOLIC RESIN FOAM PRODUCED BY THE SECOND FOAMING BONDS TO COVERING MATEIAL, AND D. HARDENNG SAID FOAM COVERING MATERIAL COMPOSITE.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein a silicone defoaming agent has been incorporated in said liquid phenol resin.
Claim 4
Dependent Claim
7 words
a solution or dispersion of a polyamide,
Claim 5
Dependent Claim
7 words
a solution or dispersion of a polyamide,
Claim 6
Dependent Claim
10 words
a solution or dispersion of a polymer of butadiene, or
Claim 7
Dependent Claim
10 words
a solution or dispersion of a polymer of butadiene, or
Claim 8
Dependent Claim
12 words
A process according to claim 1 wherein the impregnant polymer is polyisoprene.
Claim 9
Dependent Claim
68 words
A process for preparing an improved water impermeable composite laminate of a hardened foam-form phenolic resin adhered to a fiber-containing porous, water vapor permeable covering material impregnated, at least on the side facing said resin, which comprises: A. Impregnating a fiber-containing covering material on the side that said covering material is to be bonded to phenolic resin foam with an impregnating agent selected from the group consisting of
Claim 10
Dependent Claim
68 words
A process for preparing an improved water impermeable composite laminate of a hardened foam-form phenolic resin adhered to a fiber-containing porous, water vapor permeable covering material impregnated, at least on the side facing said resin, which comprises: A. Impregnating a fiber-containing covering material on the side that said covering material is to be bonded to phenolic resin foam with an impregnating agent selected from the group consisting of
Claim 11
Dependent Claim
112 words
a solution or dispersion of a polyvinyl acetal to thereby form a water vapor impermeable impregnaTed covering material; B. Continuously feeding the thus impregnated protective layer into a double band press so that said impregnated protective layer runs parallel and horizontal to a base layer of a water vapor permeable material disposed therebeneath and against said impregnated protective layer within said region foaming a liquid foamable, phenolic resin mixture on said base layer; C. Allowing said phenolic resin during foaming to contact said impregnated protective layer; and D. Hardening said phenolic resin foam in contact with said covering material at a pressure generated by the foam of between 0.01 and 2.0 kp/cm2.
Claim 12
Dependent Claim
112 words
a solution or dispersion of a polyvinyl acetal to thereby form a water vapor impermeable impregnaTed covering material; B. Continuously feeding the thus impregnated protective layer into a double band press so that said impregnated protective layer runs parallel and horizontal to a base layer of a water vapor permeable material disposed therebeneath and against said impregnated protective layer within said region foaming a liquid foamable, phenolic resin mixture on said base layer; C. Allowing said phenolic resin during foaming to contact said impregnated protective layer; and D. Hardening said phenolic resin foam in contact with said covering material at a pressure generated by the foam of between 0.01 and 2.0 kp/cm2.
Claim 13
Dependent Claim
14 words
A process according to claim 4 wherein said covering material is soda Kraft paper.
Claim 14
Dependent Claim
53 words
A process according to claim 4 wherein said phenol-aldehyde condensation product is the alkaline catalyzed condensation product of 1 mol of a phenol selected from the group consisting of phenol, resorcinol, pyrocatechol, xylenol and cresol, and 1 to 3 mols of an aldehyde selected from the group consisting of formaldehyde, acetaldehyde and furfural.
Claim 15
Dependent Claim
32 words
A process according to claim 4 wherein said phenolic resin contains as a hardener a member selected from the group consisting of p-toluene sulfonic acid, hydrochloric acid, sulfuric acid and phosphoric acid.
Claim 16
Dependent Claim
34 words
A process according to claim 4 wherein said polyamide is a member selected from the group consisting of polyundecanoamide, polycaproamide, polyhexamethylene adipamide, hexamethylene sebacamide, polyethylene linoleamide, ethylene linolen amide, ethylene vicinamide and ethylene eleostearamide.
Claim 17
Dependent Claim
54 words
A process according to claim 4 wherein said polyamide impregnant has a composition selected from the group consisting of 75:25 to 35:65 nylon 6 to nylon 66; 7:30 to 50:50 nylon 6 to nylon 610; and a mixture of at least 20 parts by weight of nylon 6 with nylon 66 and nylon 610.
Claim 18
Dependent Claim
23 words
A process according to claim 4 wherein said polybutadiene is a member selected from the group consisting of polybutadiene, polyisoprene, polychloroprene and polypiperylene.
Claim 19
Dependent Claim
26 words
A process according to claim 4 wherein said polyvinyl acetal is a member selected from the group consisting of polyvinyl formal, polyvinyl acetal and polyvinyl butyral.
References Cited (Backward Citations)
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |