Hydrophobic anti-icing composition

 

(57) Abstract:

The invention relates to the field of construction and operation of residential and industrial buildings and structures and can be used to protect the roof and other elements from moisture and from an intensive process of icing. The composition comprises a siloxane polymer of the brand "LESTOIL-CM", hardener and gum rosin as a filler in the amount 10,0-60,0 wt. % of solids of the composition. Technical result: the creation of environmentally safe, cheap composition having high tensile strength residual elongation. 2 C.p. f-crystals, 1 table.

The invention relates to the field of construction and operation of residential and industrial buildings and structures and can be used to protect their roof and other elements from moisture and from an intensive process of icing.

For the assessment of novelty and inventive step of the claimed solution consider a number of known technical devices of similar purpose.

Known anti-icing composition based on sodium chloride, including potassium chloride, magnesium chloride, hexacyanoferrate potassium, water, and sulfate deliciosamente the Disadvantage of this composition is its high cost and low mechanical characteristics.

Known hydrophobic anti-icing organosiloxane composition OS-56-22 based on siloxane polymer, see THE 23.12-007-07.50-7601-99.

The disadvantages of this composition is the high cost of the original component is a siloxane polymer, and the lack of high physical-mechanical properties of the coating, which is made on the basis of this composition, such as tensile strength and relative elongation (50%). These drawbacks greatly reduce the functionality of the composition and, accordingly, possible areas of application.

Known inventor's certificate SU 1442528 A1, 09 K 3/18, 07.12.1988 describing the deicing composition based on siloxane polymer.

The composition contains polyphenylsiloxane, phenylsilsesquioxane, polyethylsiloxane and toluene.

By the greatest number of similar features and achieved when using the result of this technical solution is chosen as the prototype of the claimed invention.

The disadvantage of the prototype is the high cost of the original component is a siloxane polymer, and not enough high physical-mechanical properties of the coating, made disadvantages greatly limit the functionality of the composition and, accordingly, possible areas of application.

The objective of the invention is the creation of environmentally safe hydrophobic anti-icing composition, ensuring a high physico-mechanical properties produced by application of coatings, the broad functionality of the composition.

The essence of the invention is expressed in the following essential features sufficient to achieve the above technical result.

According to the invention a hydrophobic anti-icing composition comprising a siloxane polymer, a filler and a curing agent, characterized by the fact that as filler it contains rosin.

This is a set of essential features that provide technical result in all cases to which the requested amount of legal protection.

In addition, the claimed solution has optional features that characterize its special cases, the specific form of its material embodiment or special conditions of its use, namely:

as the rosin used gum rosin GOST 19113-84,

- the content of the rosin is within 10,0-60,0 wt.% the dry residue to the set of features, missing in all known technical objects similar purpose.

Direct technical result that can be obtained when implementing the claimed combination of features, is that the inclusion in the composition as a filler environmentally safe rosin-related substances hazard class 4, also provides an improvement of a number of physico-mechanical characteristics of the coatings obtained with this composition (tensile strength residual elongation), simplifies the technology of preparation and use of compositions.

This technical result is not a consequence of the known properties shown separately next known from other technical objects characteristics, such as rosin, and is the only property of the entire claimed in the first claim set of features.

Specified allows you to recognize the claimed technical solution meets the criterion of "inventive step".

The claimed composition was prepared as follows.

Siloxane polymer, which can be used siloxane block copolymers of the brand "LESTOIL-CM (TU 38.03.1.006-90), normal is this in the same solvent dissolve gum rosin GOST 19113-84.

Further, these two components of the claimed composition are mixed and add the hardener, for example methyltriacetoxysilane (TO - 10C) in an amount corresponding to the mass concentration of siloxane polymer, after which the claimed composition is stored in an airtight container in a condition suitable for immediate use.

Any of the known methods of coating materials of the claimed composition is applied on the protected object surface, the solvent evaporates and the composition when it solidifies, forming a solid, reliable, hydrophobic, anti-icing and clean finish.

Physico-mechanical properties of coatings made with the use of several specific variants of the claimed compositions shown in the table.

Some useful properties which distinguish the claimed composition are as follows:

1. Composition is an environmentally friendly product.

2. Introduction rosin instead of expensive siloxane polymer reduces the cost of the claimed compositions, as well as improves its environmental and operational characteristics, as rosin is allatoxin regional contact angle - index correlating with the hydrophobic cleaning properties of the composition. The realization of the stated differences leads to increased wetting angle with 102 to 105o.

As can be seen from the table, adding in the composition of rosin in addition to providing ecological purity of the claimed composition leads to improvements in key indicators as tensile strength and residual elongation while maintaining the other rates high enough. Thus, coating, made using the claimed compositions are characterized by high strength, absence of residual elongation, which is an important indicator for elastomers, and work successfully in a wide temperature range from -50 to +110oC.

The cost of the composition is significantly reduced due to the low cost of rosin, largely replacing expensive siloxane polymer.

The industrial applicability of the claimed technical solution is confirmed by the successful test results of the coatings made with its use on a number of construction projects S. Petersburg.

Using the stated solution with - sustainability, as rosin does not contain harmful to humans and the atmosphere substances,

- high strength and absence of residual elongation coating

- simplification of the application, as stated, the composition is delivered to the consumer in one-component form, i.e. in one sealed package, which eliminates errors in the preparation and application,

- enhanced functionality,

- reduced cost.

1. Hydrophobic anti-icing composition comprising a siloxane polymer and a curing agent, characterized in that it further as filler contains rosin.

2. The composition according to p. 1, characterized in that as rosin is used gum rosin.

3. The composition according to PP. 1 and 2, characterized in that the content of the rosin is within 10,0-60,0 wt. % of solids of the composition.

 

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