The sealant composition for repairing pipelines

 

(57) Abstract:

The composition is designed to repair the defects operated and constructed a network of pipelines and district heating facilities. The composition contains as the basis of epoxy resin, filler powders of aluminum and iron and the hardener is a mixture of polyamide resin, diethylenetriaminepenta, Tris-(dimethylaminomethyl)-phenol and aluminum. The combination of components in a certain ratio provides increased tensile strength and elasticity. table 2.

The invention relates to the field of sealing compositions for repair of defects operated and constructed a network of pipelines and heating equipment.

Known epoxy composition for sealing cracks and sinks, for sealing and elimination of leaks, as well as the use of machines and structures. Compositions based on epoxy resins with various fillers and curing aliphatic polyamines. However, these technical solutions make it possible to obtain materials with insufficient strength and elasticity, or are difficult to manufacture, or in the application require accurate dzirovani the th essence and the achieved result is a composition, including epoxy Dianova resin, butadiene rubber, fillers (powders of iron and aluminum) and curing agent (a mixture of polyamide resin:diethylenetriaminepenta:Tris-(diethylaminomethyl)-phenol as a percentage - 55:38:9). [RF patent N 2080352, CL 09 To 3/10, 1997].

The composition of the prototype are shown in table 1.

The material on the basis of this composition has a high compressive strength, easy to use - allows for the possibility of rejection when mixed base and hardener up to 30% off the recommended relationship 1:1 by volume without noticeable loss of strength characteristics. The disadvantages of the composition can be attributed to the complexity of its manufacture because included in its composition of high viscosity butadiene rubber, low tensile strength and elasticity.

The aim of the invention is the simplification of the manufacture of a composition by the removal of a high-viscosity rubber and improving the strength at break and elasticity of the material based on it.

The problem is solved by optimizing the relationship of the components of the polyamide amine hardener resin: diethylenetriaminepenta: Tris-(dimethylaminomethyl)-phenol and the goal is achieved when they are sootvetstvuyushee-Dianov resin, epoxy-phenolic resin, etc.

As the polyamide resin, serving as a curing agent, can be used in a variety of polyamide resin, in particular a polyamide resin-based acids of soybean oil and polyamide resin-based acids of linseed oil.

Examples of formulations are shown in table 1, and properties of the compositions according to the examples shown in table 2.

The obtained results indicate that in comparison with the prototype materials on the basis of the proposed structure have high tensile strength and elongation at break.

The use of metal-polymer composition is as follows: base and hardener are mixed in a ratio of 1:1 by volume with an allowable error of up to 30%, the mixture is then applied to the prepared surface of the defective pipe section, is fixed for 3 hours, after which the mechanical processing of the material.

Because the claimed composition for repairing pipelines differs from the prototype, i.e., characterized by other than a prototype, a set of features, each of which is necessary, and together they are sufficient to achieve this goal, the claimed solution best analogues proposed essential features no. In the process of patent research in these and related areas of technology were not found technical solutions containing the features distinguishing the claimed solution to the prototype that allows to make a conclusion on the compliance of the claimed composition for repairing pipelines the criteria of the invention "significant differences".

The use of the present invention will allow to get easy to manufacture a material with high performance, rapid curing times, with good manufacturability.

The sealant composition for repairing pipelines, consisting of a support, comprising an epoxy resin and iron powder and aluminum as a filler, and a curing agent comprising a polyamide resin, diethylenetriaminepenta and powder of aluminum at the volume ratio of the base and the hardener 1: 1, characterized in that it contains as the basis of a mixture of epoxy resin, powders of aluminum and iron in their mass ratio of 13.0 : 5,2 : 45.8 and hardener further comprises Tris-(dimethylaminomethyl)-phenol in the mass ratio of the polyamide resin, diethylenetriaminepenta, Tris-(dimethylaminomethyl)-phenol and powder

 

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2 tbl, 6 ex

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