Patent ID: 6319351
Filing Date: 2001-11-20
Classification: C09J,C23C,Y10T

Abstract:
A process for improving the durability of a bonded aluminium alloy and/or aluminium alloy clad in industrially pure aluminium material joint, including the steps of:degreasing surfaces of the material to be joined,applying to each degreased surface a first solution of from 0.001 to 10% by volume of 1,2-Bis(triethoxysilyl) ethane in water, with or without methanol and/or ethanol, in a range of from 0.01 to 99.9% by volume at a pH value in the range of from 3 to 7,drying the first solution coated surfaces at a temperature in the range of from 20 to 120.degree. C. for a time in the range of from 1 to 90 minutes,applying to each dried first solution coated surface a second solution of from 0.01 to 50% by volume of .gamma.-Glycidoxypropyltrimethoxysilane, an aminosilane, .gamma.-aminopropyltriethoxysilane, and/or trimethoxyvinylsilane in water, with or without methanol and/or ethanol, in a range of from 0.10 to 99.9% by volume at a pH value in the range of from 3 to 7,drying the second solution coated surfaces at a temperature in the range of from 20 to 120.degree. C. for a time in the range of from 1 to 120 minutes,applying a coating of an epoxy adhesive to the dried second solution coated surfaces,contacting the epoxy adhesive coated surfaces together andcuring the contacted surfaces to bond them together.