Bonding Glass to Polycarbonate
Original Publication Date: 1978-Apr-01
Included in the Prior Art Database: 2005-Feb-20
In manufacturing display cells, it is sometimes necessary to bond glass and polycarbonate hermetically. The use of normal adhesion promoters or catalysts do not give a hermetic seal with a polyurethane or epoxy adhesive. A solution is made of a modified acrylic ester adhesive in methylene chloride, and is added to a solution of polycarbonate in the same solvent. Excess methylene chloride is driven off to produce a polycarbonate-acrylic ester-methylene chloride mix having a viscosity in the range 3000-8000 cP. The mix is then applied directly to the surfaces to be bonded, which are then clamped together. Evaporation of the solvent distributes the acrylic ester evenly throughout the bond in a matrix of hardened polycarbonate.