A room temperature curing anti-dripping sealing adhesive for engineering plastic biogas digesters and its application

Abstract

The invention discloses a room temperature cured anti-flow sealing adhesive used for an engineering plastic methane tank, and an application thereof. The sealing adhesive comprises two components of a main resin A and a curing agent B, wherein A is composed of 100 parts of an epoxy resin, 0-15 parts of an epoxy diluent, 10-30 parts of hollow glass mierobeads, 0-30 parts of an epoxy flexibilizer, 0-20 parts of an inorganic filler and 2-5 parts of a coupling agent; and B is composed of an epoxy curing agent, 0-30 parts of hollow glass mierobeads,0-10 parts of an epoxy accelerator and 10-30 parts of the inorganic filler. The two components of A and B are applied to end surfaces and a sealing bar of the engineering plastic methane tank when the sealing adhesive is in use. The high hardness hollow glass mierobeads can directly fix the adhesive components and increase the viscosity of the adhesive together with the inorganic filler when fold load-bearing operations of the combined end surfaces of the engineering plastic methane tank appear dislocation, so that the thickness of the adhesive layer under a load-bearing situation is guaranteed; the adhesive is not easy to flow with pressure; and the whole construction is efficient and simple.

Description

technical field [0001] The invention relates to the field of adhesive sealing for engineering plastic biogas pits, in particular to a room temperature curing anti-dripping sealing adhesive for engineering plastic biogas pits and an application thereof. Background technique [0002] Engineering plastic biogas digester is a new type of biogas generator that can be widely used in the construction of rural household (family) biogas digesters. It is made of ABS, modified PP and other engineering plastics. Engineering plastic biogas digesters have the advantages of light weight, easy handling and installation, and excellent comprehensive mechanical properties. [0003] The sealing of the biogas digester is a very important factor in the installation of the biogas digester, which directly determines whether the biogas digester can be used normally. Between the engineering plastic biogas digester assemblies, the sealing strips used in the biogas digester are generally used at the ju...

AI Technical Summary

Problems solved by technology

[0003] The sealing of the biogas digester is a very important factor in the installation of the biogas digester, which directly determines whether the biogas digester can be used normally. Between the engineering plastic biogas digester assemblies, the sealing strips used in the biogas digester are generally used at the junction of the end faces of the biogas digester. Directly add the sealing strip method, and rely on the pressure between the two joint surfaces to ensure airtightness, or apply adhesive between the sealing strip and the joint surface to further ensure the overall airtightness and strength of the biogas digester, while rubber, rubber and plastic The sealing strip of the material is relatively soft, and it is easy to move between planes and split between the joint surfaces under the condition of complex and changeable biogas digesters. The adhesive currently used is under pressure when the two end surfaces are closed. It cannot withstand the pressure between the two end faces, and it is easy to flow out during the construction process, which will affect the appearance of the final biogas tank, cause the adhesive layer on the two end faces to become thinner, and finally affect the air tightness of the biogas tank, making the gas tightness of the biogas tank and the overall strength has a downward trend