US4125664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped articles of foam plastics
Assignee: Individual
•
Filing: 1977-03-30
•
Granted: 1978-11-14
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Expires: 1997-03-30
Abstract
Abstract Shaped part based on rigid urea formaldehyde or melamine formaldehyde foam of at least partially open cell structure and having density of 5 to 150 kgs/cu.m. The cells of the foam material adjoining the periphery of at least one external surface of the shaped part are impregnated with a silicate, and the external surface is coated with a silicate lacquer which forms a continuous top coat. A reinforcing sheet material is bonded to the top coat. The shaped part is of improved fire proofness, and compressive, tensile, and flexural strength of the foam.
Inventors
- 👤 Herbert Giesemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:10
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5618; B32B3/00; B32B3/10; B32B3/18; B32B5/22; C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/941; E04B1/942; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/205; B32B2260/00; B32B2260/04; B32B2260/046; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0285; B32B2266/06; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2307/50; B32B2307/54; B32B2307/546; C08J2201/00; C08J2201/02; C08J2201/038; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/164; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/31504; Y10T428/31652; Y10T428/31667
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
Shaped part comprising a rigid foam of a material of the group urea formaldehyde and melamine formaldehyde, which material is at least partially of open cell structure and has a density of 5 to 150 kgs/cu.m., the cells of the foam material adjoining the periphery of at least one external surface of the shaped part being impregnated with a silicate, said external surface being coated with a silicate lacquer which forms a continuous top coat, and a reinforcing sheet material bonded to the top coat, said impregnating silicate, top coat, and reinforcing sheet material improving fire proofness, and compressive, tensile, and flexural strength of the foam.
Claim 2
Dependent Claim
106 words
Shaped part comprising a rigid foam of a material of the group urea formaldehyde and melamine formaldehyde, which material is at least partially of open cell structure and has a density of 5 to 150 kgs/cu.m., the cells of the foam material adjoining the periphery of at least one external surface of the shaped part being impregnated with a silicate, said external surface being coated with a silicate lacquer which forms a continuous top coat, and a reinforcing sheet material bonded to the top coat, said impregnating silicate, top coat, and reinforcing sheet material improving fire proofness, and compressive, tensile, and flexural strength of the foam.
Claim 3
Dependent Claim
12 words
Shaped part of claim 1, said density being 20 to 80 kgs/cu.m.
Claim 4
Dependent Claim
12 words
Shaped part of claim 1, said density being 10 to 120 kgs/cu.m.
Claim 5
Dependent Claim
12 words
Shaped part of claim 1, said density being 35 to 80 kgs/cu.m.
Claim 6
Dependent Claim
21 words
Shaped part of claim 1, the cell size of the foam being in the range of about 0.01 to 2 mm.
Claim 7
Dependent Claim
30 words
Shaped article of claim 1, the impregnation being performed by impregnating the condensed and dried foam with a solution or suspension of the silicate, and hardening the silicate in situ.
Claim 8
Dependent Claim
17 words
Shaped article of claim 6, said hardening in situ being by heating to 80° to 160° C.
Claim 9
Dependent Claim
23 words
Shaped article of claim 1, wherein the silicate lacquer top coat is an adhesive bonding the reinforcing sheet material to the top coat.
Claim 10
Dependent Claim
39 words
Shaped foam part according to claim 1, characterized in that it contains the silicate impregnation above a synthetic resin coating incorporated into the foam by pre-impregnation, said synthetic resin pre-impregnation consisting of a synthetic resin cured within the foam.
Claim 11
Dependent Claim
28 words
Shaped foam part according to claim 1, characterized in that the concentration of the impregnating agent decreases from the external surfaces of the shaped part towards its interior.
Claim 12
Dependent Claim
27 words
Shaped foam part according to claim 1, characterized in that supports consisting of the impregnating material and connecting at least two surfaces extend through said shaped part.
Claim 13
Dependent Claim
39 words
Shaped foam part, characterized in that it is formed by a compound arrangement of a plurality of silicate-impregnated basic shaped parts of foam according to claim 1 and exhibits a bulkhead or compartment structure consisting of flame-resistant silicate-impregnated layers.
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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) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |