Coating processes – Interior of hollow article coating
Patent
1996-09-12
1997-09-30
Pianalto, Bernard
Coating processes
Interior of hollow article coating
427299, 427403, 4274071, 4274432, B05D 722
Patent
active
056723849
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method of eliminating moisture problems in housing and premises having a concrete supporting structure.
BACKGROUND
Most of the housing and premises in Sweden were built after 1945. Up to the industrialization of the erection during the seventies, comparatively few different building materials were used. The experience of these materials, such as stone, wood, bricks, concrete, sheet metal etc., based on few raw materials, was extensive. Concrete is a building material which has been used in constructions built in situ as well as in prefabricated constructions. Concrete as a building material is formed when cement, gravel, stone and water is mixed in order to obtain the desired properties. Nowadays concrete contains a large number of chemical substances among other things in order to obtain better characteristics in manufacture, transport and erection. Construction concrete for the supporting elements of the buildings such as the floor and the walls contains, among other things, Portland cement, the characteristics of which counteract damage of the reinforcement steel.
Flow putty is used to even out concrete floors before laying down the floor covering, such as linoleum, PVC carpets and different types of wooden floors. Flow putty is manufactured from cement, dried sand and different additives. The most common flow additive formerly was casein, which is a protein which was added to flow putty in order to enhance the flowing-out properties. Now other additives are used, e.g. melamine.
The cause of the problems which are summarized under the term "sick houses" can primarily be derived from the high moisture load, which e.g. the concrecte floors are subjected to during the building phase, as well as the acute moisture damages in the form of "water damages" which occur during the user phase of housing and premises. Nowadays it is known that high pH-values, e.g. an alcaline environment, creates a combination effect where for example PVC carpets and softeners therein as well as carpet adhesives, are broken down by alcaline moisture from the concrete as well as when ammonia escapes from flow putty.
It is not only the moisture in itself that is the problem but also the character of the moisture, i.e. its high pH-value, which is the reason for a large part of the sick-house-problems.
THE INVENTION
The object of the invention is to provide a method of substantially reducing the damages in view of health problems caused by the above mentioned technical deficiencies.
This is achieved with the method according to the present invention which is characterized by hydrophobic impregnation of the supporting concrete construction/bedding with the aid of a hydrophobic agent with a molecular size such that the impregnation becomes open to diffusion, and thereafter treatment of the bedding with an acid ionexchanger having been mixed into a carrier.
Thanks to the hydrophobic impregnation future water uptake by the concrete is reduced to a minimum while at the same time it is left to diffusion so that moisture is not confined therein. This is of utmost importance for a tile on the ground in which the relative humidity can be up to 100%. Preferably, silanes and/or siloxanes are used, which have a suitable molecular size. The acidic ion exchanger then takes care of the alcalinity of the moisture coming from the alcaline Portland cement and possible ammonia being formed at the degradation of flow putty etc. This means that the esther hydrolysis reaction which breaks down softening agents in e.g. PVC carpets and adhesives for floor carpets, normally a phtalic acid esther such as di(2-ethyl hexyl)-phtalate, practically ceases. The pH of the moisture should be less than 9, and preferably be less than or equal to 8.
Hereby is achieved that, besides that the problems with sick houses are reduced or eliminated, the life of the floor carpets increases from one or a few years to at least 15 years. The normal time of use for PVC carpets in premises and housing are 8-10 years.
The choice of the ion excha
Kanngard Bengt
Kristensson Jan
LandOfFree
Method of eliminating moisture problems in housing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of eliminating moisture problems in housing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of eliminating moisture problems in housing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2255227