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US 2003/0192458 A1Published application
Adhesive composition
AssigneeR-Amtech International, Inc.
InventorsAlexej Sergeovleh Brykov, Valentine Issaxovish Kornfev
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AssigneeR-Amtech International, Inc.
InventorsAlexej Sergeovleh Brykov, Valentine Issaxovish Kornfev
Estimating the term…
The invention relates to adhesives manufacturing. These adhesives are used in household and industry for adhering various materials (concrete, ceramics, different coatings, etc) exploited under temperatures +50° C. to −20° C and under elevated humidity. The adhesive composition represents the product of interaction between potassium silicate aqueous solution (density of 1.3 to 1.37 g/cm3, molar ratio SiO2/K2O of 3.4 to 3.7), anhydrous lithium hydroxide mixed with di- or trihydric alcohol, vollastonite (particle size of 150 μm and smaller, length to diameter ratio 5-3:1), talc (particle size of 10 to 20 μm mainly) and inorganic pigment. The adhesive composition is prepared by a given consecutive mixture of components. The adhesive composition has enhanced activity (storage stability) and water resistance. It also has improved strength of adhesion junction while adhering various materials; it is non-toxic and pollution-free.
An adhesive composition including a product of interaction between potassium silicate aqueous solution (potassium water glass) and anhydrous lithium hydroxide mixed with di- or trihydric alcohol or their mixture, vollastonite, talc and inorganic pigment, wherein the potassium silicate solution initially has a density of about 1.30 to 1.37 g/cm3 with a SiO2/K2O molar ratio of about 3.4-3.7, wherein said vollastonite initially has a particle size not more than about 150 μm and a length to diameter ratio of about 5-3:1, and wherein the composition has a component ratio (in percent by weight) as follows:
Dependencies are inferred from the claim text.
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Containing alkyl, ammonium or metal silicates; containing silica sols: silicates of the alkali metals
Adhesives based on inorganic constituents: containing water-soluble alkali silicates
Lime, magnesia
Adhesives
Term end not estimated
The invention relates to adhesive compositions on the basis of inorganic binder (water glass) and may be used in industry and household for adhering ceramic or natural stone tiles or other coatings to concrete and plastered wall, ceiling and floor surfaces, for inner and outer finishing of residential and public buildings.
RU 2131447, Jun. 10, 1999, reports of adhesive composition comprising from 38 to 42% w/w sodium silicate solution (water glass), filler (34 to 36% w/w marble powder), 2% w/w sodium sulfide and the rest is talc. This adhesive composition adheres wide range of materials such as metal, wood, tiles, silica glass, linoleum, etc.
This adhesive composition has several considerable drawbacks:
For 1 kg adhesive composition preparation under room temperature, blade mixer is loaded with 378 g potassium silicate aqueous solution with the density of 1.32 g/cm3 and molar ratio SiO2/K2O of 3.6. Under blades rotating, 12 g anhydrous lithium hydroxide is added in portions of 3 to 4 g. Each lithium hydroxide portion is being mixed until its complete dissolution. Then, under blades rotating, 40 g glycerol is added in portions of 10 g. Then 44 g vollastonite with particle size of 90 μm and L/D ratio of 3:1 and 9 g talc with particle size of 10 to 20 μm are mixed until getting a homogenous product. 440 g vollastonite and 90 g talc are added this way. The final stage includes adding 40 g titanium dioxide and mixing within 30 minutes. Ready-made adhesive composition, a white viscous mass, is bottled and being stored in hermetic packages.
While using adhesive composition, it is put on concrete, plastered or other surface in a thin layer (1 to 3 mm) and after that, coating tile or other material is slightly pressed to adhesive composition layer.
Claimed adhesive composition allows adhere coating materials and articles such as ceramic and natural stone tiles, parquet, pendant ceilings to concrete and plastered wall, ceiling and floor surfaces for inner and outer finishing of residential or public buildings. The buildings are exploited under temperatures from +50 to −20° C. and under high humidity.