Unlock instant, AI-driven research and patent intelligence for your innovation.

Casting repairing glue

A technology of castings and carboxylated nitrile rubber, which is applied in the direction of adhesives, non-polymer organic compound adhesives, etc., can solve the problems of technical workers consuming a lot of materials and time, scrapping castings, reducing the compactness of castings, etc., and achieve long service life , short curing time and high bonding strength

Inactive Publication Date: 2013-03-20
苏州市德莱尔建材科技有限公司
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pores will also reduce the compactness of castings, causing some castings that are required to withstand hydrostatic tests to be scrapped; trachoma is a hole-like defect filled with molding sand inside or on the surface of the casting. Repairing these defects requires skilled workers to consume a lot of materials and time. Restoration becomes waste

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A kind of cast repair glue, comprises the following components by weight: 40 parts of epoxy resin E44, 15 parts of carboxylated nitrile rubber, 5 parts of acrylonitrile, 30 parts of triethylenetetramine, 4-ethyl-2- 4 parts of methylimidazole, 1.5 parts of ethylenediamine, 3 parts of aluminum oxide. Mix carboxylated nitrile rubber and acrylonitrile, add to epoxy resin E44, stir to dissolve, heat and react at 90°C for 2 hours to obtain component A; mix the remaining components in proportion, stir and react for 2 hours to obtain component B; Finally, mix component A and component B to obtain casting repair glue, viscosity 320s / 25°C, shear strength 15MPa, maximum heat resistance temperature 180°C, water resistance, no shedding and penetration in tap water for 60 days , tightness 0.08N / m 2 , curing time 18h at 25°C, 30min at 60°C.

Embodiment 2

[0013] A casting repair glue, including the following components by weight: 65 parts of epoxy resin E51, 8 parts of carboxylated nitrile rubber, 3 parts of acrylonitrile, 20 parts of triethylenetetramine, 4-ethyl-2- 6 parts of methylimidazole, 0.8 part of dimethylaniline, and 1 part of silane KH-550. Mix carboxylated nitrile rubber and acrylonitrile, add to epoxy resin E51, stir to dissolve, heat and react at 80°C for 3 hours to obtain component A; mix the remaining components in proportion, stir and react for 1 hour to obtain component B; Finally, mix component A and component B to obtain casting repair glue, viscosity 340s / 25°C, shear strength 14MPa, maximum heat resistance temperature 178°C, water resistance, no shedding and penetration in tap water for 60 days , tightness 0.11N / m 2 , curing time 18h at 25°C, 30min at 60°C.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Shear strengthaaaaaaaaaa
Heat resistance temperatureaaaaaaaaaa
Shear strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a casting repairing glue which comprises, by weight, 40 to 65 parts of an epoxy resin, 8 to 15 parts of carboxylated nitrile rubber, 3 to 5 parts of acrylonitrile, 20 to 30 parts of triethylene tetramine, 4 to 6 parts of 4-ethyl-2-methylimidazole, 0.8 to 1.5 parts of a stabilizing agent and 1 to 3 parts of a coupling agent, wherein the stabilizing agent is ethene diamine or dimethylaniline, the coupling agent is aluminum oxide or silane, and the epoxy resin is E44, E42 or E51. The casting repairing glue provided by the invention has high bonding strength, a short curing time, high temperature resistance, pressure resistance and a long service life.

Description

technical field [0001] The invention relates to a casting repair adhesive, which belongs to the technical field of adhesives. Background technique [0002] Casting defects have always been the most common problems in the foundry industry. The main casting defects include pores and sand holes. The pores are the defects of holes in the casting that the gas does not escape in time before the molten metal crusts. After the pores are generated in the casting, the effective bearing area will be reduced, and stress concentration will be caused around the pores, which will reduce the impact resistance and fatigue resistance of the casting. Pores will also reduce the compactness of castings, causing some castings that are required to withstand hydrostatic tests to be scrapped; trachoma is a hole-like defect filled with molding sand inside or on the surface of the casting. Repairing these defects requires skilled workers to consume a lot of materials and time. Restoration be...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09J4/02C09J4/06
Inventor 计慷
Owner 苏州市德莱尔建材科技有限公司