Patent Application
20140023845
The present invention refers a thermal insulation waterproofing and adherible film and method for preparing the same, that for its components and physical and chemical characteristics is easy to apply, durable, and with excellent insulation and waterproofing properties.
At present in the state of art there are thermal insulation waterproofing and adherible films based in materials of similar composition to the present invention, or based in equivalents polymeric components with calcium carbonate, titanium dioxide and cellulose, with the characteristics of applicability, flexibility and thickness. Although there are commercially thermal insulation and waterproofing coatings, do not exist in the modality of sticky films with properties of the present invention. On the other hand, the advantages of the present, it will be understandable for a person with middle knowledge in the art, based on the next description in a preferred embodiment of the invention.
The present invention refers a thermal insulation waterproofing and adherible film and method for preparing the same.
The adherible film comprises a base layer of a thermal insulation and waterproofing material, based in waterproofing acrylic, to coat pipes, ducts, containers, ovens and surfaces where required to maintain the temperature and prevent moisture damage.
The preferred composition of the material used to manufacture the base layer of thermal insulating waterproofing and adherible film, in its preferred modality, descriptive but not limited to this, is as follows (table 1):
To prepare the thermal insulation waterproofing and adherible film can be used different proportions and trade names of the components, which can be adjusted depending on the thermal and physical characteristics that want to confer to the adherible film in their application or use, such as thermal conductivity, tension, bending, compression, expansion and contraction applied as required. Preferred compositions which can be used include the following percentages by weigh (table 2):
This material has a dense non-fluid consistency, which has a thermal conductivity factor (K) of 0.39 W/m K, an emissivity from 0.8 to 23° C., pH between 7.0 and 9.0, viscosity from 40,000 to 85,000 cps, an apparent density of 515.16 Kg/m3, steam water permeability of 0.00921 ng/Pa s m, a humidity adsorption of % mass of 0.065, and % volume of 0.031.
These components were selected according chemical properties and purity, suppliers and trade names deployed in following list (table 3):
indicates data missing or illegible when filed
Should be emphasize that based on diverse trial and error tests, making variations in aggregate and sequencing of components, as well as prime materials changes, is obtained a monolithic, paded and flexible film, as a result of the granulometric modifications of the particles which gives to the product thermal insulation and waterproof functions.
Unlike the acrylic waterproof coatings, the thermal insulation cell acrylic waterproof material of the present invention, allows the obtaining of films with thickness from 1.2 to 1.5 mm. in one step, however, during coating process, the times are often extended by drying each applied film. Starting from this feature and to facilitate the installation of the coating, we intends to manufacture films of various thickness to find the ideal to form a flexible, manageable and adherible film, but at the same time complying with minimum insulation and waterproofing properties, with possible minimum material and without excess of the same. We worked with different thicknesses, such as 1.2, 1.5, 2.4, 2.6, 2.8, 3.0, 3.2, 3.4, 3.6, 3.8, 4.0, 4.2 and 4.4 mm, and according to tests carried out, the preferred modality that comply the requirements is 2.8 to 3.0 mm, for general applications and uses.
The film of the present invention is made preferably by applying insulation and waterproofing material over a layer of thermoplastic polymer, preferably polyethylene, to achieve a uniform layer with same thickness throughout its surface. The application can be manual with brushes, rollers or spray until desired thickness is achieved. The drying of layer of insulation and waterproofing material must be carried out at temperatures between 45 to 70° C., preferably at 50° C., which will depend on the thickness of the layer, where the means of drying preferentially selected are weather, hot air flow and heating furnaces. Once dried the insulation and waterproofing material, this presents a loss of volume between 9.5 and 10%, preferably of 9.7% compared to the initial volume of the mixture of insulation and waterproofing material.
To adhere the film to a surface is applied a layer of adhesive on at least one side of the base layer, preferably water-based acrylic adhesive, where said adhesive layer is applied while installing the film, or it can be integrated with the base layer. To corroborate the suitable adhesive, different adhesives were tested, with the best adhesion and compatibility of those adhesives formulated with high adhesiveness acrylic resins, solvent-free water-based, thick with viscosity of 1,000 to 2,000 cps, a pH between 8.5 and 9.5, and a density of 1 to 1.01 Kg/L. Another type of adhesive that can be used those formulated with solvent-based phenolic resins.
The size of the film may vary depending on the place where it applies, where a handling modality is in rolls with a width of 1 cm, 10 cm, 50 cm., and 1 m by 7 m long. Film is preferably used for its marketing of 1.22 m wide by 7.31 m long, with a thickness of 2.8 to 3.0 mm, a weight of 14.5 to 14.8 Kg, a K factor of 0.0640 W/m° K and an emissivity of 0.8 (at 23° C.).
The advantages of the thermal insulation waterproofing and adherible film of the present invention were tested through field evaluations and various laboratory tests.
Various scientific tests were carried out, such as the measurement of thermo mechanical properties and thermal conductivity to determine the R factor (thermal resistance) and K factor (thermal conductivity factor), which were performed in Research Center for Applied Chemistry (CIQA) of CONACYT, and for EMA laboratory of the IDESA company, where evaluated experimental parameters were as follows:
Additionally, the film of the present invention was successfully certified in the evaluation standard NOM-018-ENER-1997 and 2011 for thermal insulation and waterproofing coating, as well as those evaluations about of characteristics, limits and test methods such as NMX-C126-1982 NMX-C181-1984-1984-C210 NMX, NMX-1984 and ASTM C288-C272.
Even when the present invention has been described respect some preferred embodiments, it is obvious that alterations and equivalent modifications can be proposed by skilled person in the field, after reading and understanding the description, therefore is understood that this invention is not limited to that was illustrated, but the scope of the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| MX/A/2012/008450 | Jul 2012 | MX | national |
