US4043950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of plastic foams and flame-proofing foams characterized by the use of a carrier foam
Assignee: Individual
•
Filing: 1976-05-03
•
Granted: 1977-08-23
•
Expires: 1996-05-03
Abstract
Abstract Process for the preparation of flameproof synthetic resin foams which comprises admixing (a) a furan resin and/or (b) a co-condensate of a furan resin with phenol and/or melamine and/or urea and/or cresol, and/or (c) a polyester, epoxy, polyurethane, acrylic, alkyd, phenoplast or aminoplast resin or a mixture thereof, with a carrier foam of an aqueous and/or aqueous alcoholic synthetic resin prepared with the aid of a foaming agent and compressed gas.
Inventors
- 👤 Hans Wilmsen, deceased
- 👤 sole heir by Joerg Michael Wilmsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:45
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; C08J9/0014; C08J9/0061; C08J9/0066; C08J2361/00; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/907; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
153 words
Process for the manufacture of plastic foams and flameproofing foams based on aqueous and/or aqueous alcoholic synthetic resins, in which the synthetic resin is foamed up by means of foaming agents and compressed gas and is subsequently cured, if appropriate using catalysts and/or reducing agents and/or oxidizing agents, and the chemical and/or the mechanical and/or the physical properties of the known foams and/or new foams are improved by new reaction systems and/or additives, characterised in that a carrier foam of urea-formaldehyde resin or a carrier foam containing urea-formaldehyde resin and at least one member from the group consisting of: a. furan resin, b. furan resin co-condensate, c. polyester resin, epoxy resin polyurethane, acrylic resin, alkyd, phenoplast resin or aminoplast resin, is formed, the carrier foam being rapid curing, and (2) further solid and/or liquid additives are mixed into the finished but not yet cured carrier foam in one or more subsequent mixing chambers.
Claim 2
Dependent Claim
153 words
Process for the manufacture of plastic foams and flameproofing foams based on aqueous and/or aqueous alcoholic synthetic resins, in which the synthetic resin is foamed up by means of foaming agents and compressed gas and is subsequently cured, if appropriate using catalysts and/or reducing agents and/or oxidizing agents, and the chemical and/or the mechanical and/or the physical properties of the known foams and/or new foams are improved by new reaction systems and/or additives, characterised in that a carrier foam of urea-formaldehyde resin or a carrier foam containing urea-formaldehyde resin and at least one member from the group consisting of: a. furan resin, b. furan resin co-condensate, c. polyester resin, epoxy resin polyurethane, acrylic resin, alkyd, phenoplast resin or aminoplast resin, is formed, the carrier foam being rapid curing, and (2) further solid and/or liquid additives are mixed into the finished but not yet cured carrier foam in one or more subsequent mixing chambers.
Claim 3
Dependent Claim
30 words
Process according to claim 1, characterised in that after foaming by means of foaming agents and compressed gas, an after-foaming is effected by additives which react exothermically, splitting off gas.
Claim 4
Dependent Claim
43 words
Process according to claim 1, characterised in that as organic and/or inorganic materials, powders and/or solutions and/or dispersions and/or suspensions of polymers and/or monomers and/or softening, plasticising, thickening or stabilising liquids, individually or as mixtures, are introduced continuously into the continuously flowing foam.
Claim 5
Dependent Claim
42 words
Process according to claim 1, characterised in that the resins and/or the additives, individually or together with the other added media, are caused to undergo polycondensation, polyaddition and/or polymerisation so that mineral setting reactions and/or hydrolysis and/or hydration and/or organo-metallic crosslinking occurs.
Claim 6
Dependent Claim
38 words
Process according to claim 1, characterised in that the additives used are flameproofing substances based on boron, phosphorus, halogen, nitrogen and/or antimony trioxide, asbestos, perlite, vermiculite, highly disperse silica and mineral substances, such as sodium silicates and alumina.
Claim 7
Dependent Claim
36 words
Process according to claim 1, characterised in that, as additives, sugars and/or dextrose and/or starch and/or ureas and/or monohydric or polyhydric alcohols are added to convert the synthetic resin foam into a frothable, flame-resistant carbon foam.
Claim 8
Dependent Claim
29 words
Process according to claim 1, characterised in that oils, oleic acids, tall oils, silicone oils, waxes and/or halogenated or unhalogenated paraffins, or glycerol or sorbitol are used as additives.
Claim 9
Dependent Claim
21 words
Process according to claim 7, characterised in that a foaming agent which is a sulphonation product of vegetable fats is used.
Claim 10
Dependent Claim
93 words
Process according to claim 1, characterised in that there are used as further additives, in a solid and/or liquid form, individually or as mixtures, to modify and improve the structure and the physical properties of the foam; cement, gypsum, aluminia, china clay, calcium carbonate, calcium chloride, aluminium compounds, aluminium phosphates, aluminium silicates, aluminium sulphate, aluminium oxide, aluminium-chromium oxide, metal oxides of manganese, magnesium, zirconium, beryllium and titanium, metal powders, graphite, polyvinyl acetate, polyvinyl alcohol, glycol and other monohydric or polyhydric alcohols, glycerol esters, sodium sulphite, acrylamide, lignin, ammonium phosphates, cersol, cellulose, and bitumen.
Claim 11
Dependent Claim
18 words
Use of the foams obtained by the process of claim 1, as insulating foams and/or as flameproofing foams.
Claim 12
Dependent Claim
22 words
Use of the foams obtained by the process of claim 1 for cable ducts to protect them against fire and gas permeation.
Claim 13
Dependent Claim
37 words
Use of the foams obtained by the process of claim 1 as gas-tight and/or vapourtight outer layers and intermediate layers which are produced by introduction of, or brushing or spraying with bitumen latex, tar, or epoxy resin.
Claim 14
Dependent Claim
22 words
Use of the foams obtained by the process of claim 1 for insulating sandwich-type metal doors or wooden doors, or sandwich elements.
Claim 15
Dependent Claim
19 words
Use of the foams obtained by the process of claim 1 as a casing for steel supports and girders.
Claim 16
Dependent Claim
19 words
Use of the foams obtained by the process of claim 1 for sandwich-type outer walls, facades and steelconstruction buildings.
Claim 17
Dependent Claim
17 words
Use of the foams obtained by the process of claim 1 for the production of fireproof partitions.
References Cited (Backward Citations)
US3004934A
Cited
US3383338A
Cited
US3832311A
Cited
US3839239A
Cited
US3824200A
Cited
US3865757A
Cited
US3979341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |