Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1981-03-03
1984-06-05
Parrish, John
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
264 453, 264 69, 264333, C09J 102
Patent
active
044526369
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method for manufacturing porous shaped articles, such as flat or channel shaped insulation plates, blocks and similar building elements, in which spheres of expanded porous resinous foamed material are blended with a binder, comprising a bituminous product, by means of which the adherence of the foamed resin to the cement in the final product is promoted, while at the end of this blending operation a quantity of particulate or powdery material is added to and co-blended with said blend until the mass again consists mainly of loose spheres, whereupon cement is added to the blend and the entire mixture is subjected again to a second mixing operation, while metering a quantity of water, and the mixture thus finally obtained is formed into the desired articles by compression followed by drying said articles.
Such method is known from the Dutch Patent Application No. 71.13658
The articles obtained by the known method smell heavily of the bituminous product added as the binder, so that they have to be left exposed to the open air for several days before they can be used for building houses or similar constructions.
Moreover the articles obtained by said known method have a relatively low compressive strength of about 5 kg/cm.sup.2 due to which these articles are not suitable to be used directly for constructing walls, partitions and the like of houses, buildings and other structures.
The object of the invention is to provide an improvement in the known method so that the articles obtained by this method do not smell and will have such a high compressive strength that the articles can be used at once for constructing completely insulated houses, buildings and the like.
This object is attained in that in the method according to the invention the binder comprises a mixture of a bituminous product and waterglass with a waterglass content of at the most 75% by weight.
Preferably a quantity of an additive such as sand is added before subjecting the mixture to said second mixing operation while upon forming the mixture finally obtained into the desired articles by compression said mixture is also subjected to vibration and the articles are dried in a self-supporting condition.
The articles obtained in this way do not smell and have a compressive strength of at least 40 kg/cm.sup.2 so that the articles are eminently suited for direct use in constructing walls and other parts of all types of buildings, said articles being furthermore strongly fire-resistant. Moreover the articles obtained after the compression and vibration operation may be directly dried in self-supporting lying condition and the articles do not have to be kept in molds during the drying period as is the case in the above mentioned known method.
When applying the method according to the invention the compression and vibration operation may be performed in an apparatus of the "Hydromat" type supplied by 'Hess Maschinenfabrik KG", destined for compression molding of common non-porous concrete blocks; the pressure applied when carrying out the method according to the invention however being appreciably lower than that required for the compression molding of the common concrete blocks.
Preferably the additive is added at the termination of the first mixing operation, i.e. the blending operation, this additive thus replacing part of the total amount of cement to be added in accordance with the known method whereas the total amount of cement is added at once during the second mixing operation.
When maintaining the addition of a part of the total quantity of cement to be added upon termination of the first mixing operation the additive may be added according to the inventive method when transferring the blend from the first to the second mixing operation.
The invention will now be elucidated further in detail with reference to the annexed drawing in which:
FIG. 1 shows diagrammatically an apparatus preferably used for carrying out the method according to the invention;
FIG. 2 shows diagrammatically a house completely built from artic
REFERENCES:
patent: 3024125 (1962-03-01), Lee
patent: 3326701 (1967-06-01), Freyhold
patent: 3959423 (1976-05-01), Boyd
patent: 4032352 (1977-06-01), Pietsch
patent: 4032352 (1977-06-01), Pietsch
patent: 4037375 (1977-07-01), Maggos
patent: 4071996 (1978-02-01), Moto
patent: 4170093 (1979-10-01), Cappellini
Parrish John
Smolowitz Martin
LandOfFree
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