BE410562A - - Google Patents
Info
- Publication number
- BE410562A BE410562A BE410562DA BE410562A BE 410562 A BE410562 A BE 410562A BE 410562D A BE410562D A BE 410562DA BE 410562 A BE410562 A BE 410562A
- Authority
- BE
- Belgium
- Prior art keywords
- resins
- porous materials
- water
- bodies
- impregnation
- Prior art date
Links
- 239000011148 porous material Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 238000005470 impregnation Methods 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 230000001131 transforming Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 150000001896 cresols Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000011505 plaster Substances 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 235000011118 potassium hydroxide Nutrition 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002035 prolonged Effects 0.000 description 2
- ZRYCRPNCXLQHPN-UHFFFAOYSA-N 3-hydroxy-2-methylbenzaldehyde Chemical compound CC1=C(O)C=CC=C1C=O ZRYCRPNCXLQHPN-UHFFFAOYSA-N 0.000 description 1
- QWVGKYWNOKOFNN-UHFFFAOYSA-N O-Cresol Chemical compound CC1=CC=CC=C1O QWVGKYWNOKOFNN-UHFFFAOYSA-N 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N Polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N ammonium hydroxide Chemical class [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012262 resinous product Substances 0.000 description 1
- 239000012261 resinous substance Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4823—Phenol-formaldehyde condensation products
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials For Medical Uses (AREA)
Description
<Desc/Clms Page number 1>
Bernard SZEPS
BREVET D'INVENTION avec DROIT DE PRIORITE EN BELGIQUE
PROCEDE DE DURCISSEMENT DE PIETRE ET D'AUTRES MATIERES POREUSES
La présente invention a pour but l'amélioration de matières poreuses, com par exemple du plâtre de Paris, en augmentant leur dureté, leur compacité et l@ poli et en les rendant imperméables à l'eau.
Le procédé consiste dans l'imprégnation des moulages en plâtre ou d'autres objets en matière poreuse, avec une solution aqueuse ou une dispersion, qui pa: un traitement approprié, par exemple par une exposition prolongée à la chaleur se condense et polymerise pour former une masse résineuse compacte avec l'évap ration simultanée de l'eau qui accompagnait la matière imprégnante. Le moulage plâtre ainsi traité devient imperméable à l'eau et perd sa friabilité caractér' tique, devenant ainsi semblable aux produits céramiques. Le moulage ainsi trai peut, si l'on veut, être verni, teint etc. dans des buts décoratifs et est susc tible de recevoir une surface d'un haut degré de poli.
On connaît déjà des procédés pour imprégner des matières poreuses ou fibreuses avec des substances résineuses dissoutes dans des solvants organiques, exemple vernis ou autres solutions de résines dans l'alcohol, benzol ou liquid similaires, solutions de produits résineux "solubles" de phénol-, crésol- ou urée-formaldehyde. La présente invention diffère de ces procédés en ce que l'i prégnation de matières poreuses (qui ne demandent pas à être libérées que de l'excès de l'eau) se fait par les composantes réactives de résines synthétique dans leur état soluble intermédiaire mais déjà résineux. De cette façon, on év non seulement la nécessité d'un desséchage prolongé et complet de matières poreuses que l'on veut traiter, mais aussi l'emploi coûteux de solvants et dilue organiques.
Tandis qu'en pratique le présent procédé emploie du phénol ou du crésol c de l'urée avec formaldéhyde aqueux comme produits réactifs pour forcer la soli tion et imprégner les matières qu'on se propose de traiter, l'invention n'est limitée à ces corps, mais englobe tout corps susceptible de former des produil de condensation résineux spontanément avec le temps, par déshydratation ou par une élévation de température suffisamment modérée pour ne pas détruire la strt ture interne de la matière traitée, et qui au début de la condensation ne pré@ pitent pas de leur solution aqueuse ou de leur dispersion.
Dans ce but, la pre sente invention emploie comme catalyseur, pour l'état initial et final de cône
<Desc/Clms Page number 2>
sation et de polymérisation, des bases solubles dans l'eau ou des substances alcalines, par exemple des hydroxides de sodium, de potassium ou d'ammonium, leurs équivalents ou d'autres catalyseurs qui ne produisent pas une précipitation de résines non solubles dans l'eau.
Pour donner un exemple on peut procéder comme il suit: On mélange des poids égaux de crésol commercial ("acyde crésylique") et de formaldéhyde de 40% et un ou deux pour cent d'hydroxide de potassium en solution aqueuse de 50% en poids.
Le moulage en plâtre qu'on se propose d'endurcir est immergé dans la solution décrite ci-dessus jusqu'à la saturation. La solution et le moulage peuvent, si nécéssaire, être portés à une température de 35 de préférence pour faciliter l'absorbtion. L'imprégnation peut être répétée plusieurs fois suivant le degré de dureté et d'imperméabilité etc. qu'on désire obtenir. Le moulage ainsi imprégné est ensuite étuvé à une température ne dépassant pas 100 C jusqu'à ce qu'il arrive au degré de dureté voulue.
Un autre exemple de traitement est celui od l'on remplace le crésol dans l'exemple cité plus haut, par une proportion équivalente de l'urée commerciale; la façon de procéder étant semblable.
<Desc / Clms Page number 1>
Bernard SZEPS
PATENT OF INVENTION with RIGHT OF PRIORITY IN BELGIUM
PROCESS FOR CURING PIETRE AND OTHER POROUS MATERIALS
The object of the present invention is to improve porous materials, such as plaster of Paris, for example, by increasing their hardness, their compactness and the polish and by making them impermeable to water.
The process consists in the impregnation of plaster casts or other objects of porous material, with an aqueous solution or a dispersion, which by appropriate treatment, for example by prolonged exposure to heat, condenses and polymerizes to form a compact resinous mass with the simultaneous evaporation of the water which accompanied the impregnating material. The plaster cast thus treated becomes impermeable to water and loses its characteristic brittleness, thus becoming similar to ceramic products. The molding thus treated can, if desired, be varnished, dyed etc. for decorative purposes and is capable of receiving a surface of a high degree of polish.
Processes are already known for impregnating porous or fibrous materials with resinous substances dissolved in organic solvents, for example varnishes or other solutions of resins in alcohol, benzol or similar liquids, solutions of "soluble" resinous products of phenol-, cresol- or urea-formaldehyde. The present invention differs from these processes in that the impregnation of porous materials (which require not to be released only from excess water) takes place by the reactive components of synthetic resins in their intermediate soluble state but already resinous. In this way, one avoids not only the need for a prolonged and complete drying of the porous materials which one wants to treat, but also the expensive use of organic solvents and dilutes.
While in practice the present process employs phenol or cresol and urea with aqueous formaldehyde as reactive products to force the solution and permeate the materials to be treated, the invention is not limited to these bodies, but includes any body likely to form resinous condensation products spontaneously with time, by dehydration or by a sufficiently moderate rise in temperature not to destroy the internal structure of the material treated, and which at the onset of condensation do not precipitate from their aqueous solution or their dispersion.
For this purpose, the present invention employs as a catalyst, for the initial and final cone state
<Desc / Clms Page number 2>
sation and polymerization, water soluble bases or alkaline substances, for example sodium, potassium or ammonium hydroxides, their equivalents or other catalysts which do not produce precipitation of insoluble resins in water. 'water.
To give an example, one can proceed as follows: Mix equal weights of commercial cresol ("cresylic acid") and 40% formaldehyde and one or two percent of potassium hydroxide in aqueous solution of 50% by weight .
The plaster cast which it is proposed to harden is immersed in the solution described above until saturation. The solution and the molding can, if necessary, be brought to a temperature of preferably 35 to facilitate absorption. Impregnation can be repeated several times depending on the degree of hardness and impermeability etc. that we want to obtain. The molding thus impregnated is then baked at a temperature not exceeding 100 ° C. until it reaches the desired degree of hardness.
Another example of treatment is that where the cresol is replaced in the example cited above with an equivalent proportion of commercial urea; the procedure being similar.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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BE410562A true BE410562A (en) |
Family
ID=74719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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BE410562D BE410562A (en) |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE410562A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0370799A1 (en) * | 1988-11-23 | 1990-05-30 | Union Carbide Corporation | Method for sealing carbon and graphite surfaces |
-
0
- BE BE410562D patent/BE410562A/fr unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0370799A1 (en) * | 1988-11-23 | 1990-05-30 | Union Carbide Corporation | Method for sealing carbon and graphite surfaces |
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