UV-STRENGTHENING GLUE COMPOSITION, OPTICAL READING HEAD WITH ITS USING AND OPTICAL RECORDING/REPRODUCING DEVICE COMPRISING OPTICAL READING HEAD Russian patent published in 2007 - IPC C09J175/16 C08G18/67 

FIELD: glue compositions.

SUBSTANCE: invention relates to UV-strengthening glue compositions used for gluing polymethylmethacrylate with metal. Proposed composition comprises oligourethane-acrylate representing product of interaction of oligobutadienediol of molecular mass 2000-3000 Da, aliphatic or aromatic diisocyanate and hydr(o)oxyalkylmethacrylate taken in the molar ratio = 1:2:2, reactive monomer-diluting agent representing a mixture of mono- and polyfunctional methacrylate, polymeric filling agent - polyethylene of high density with particles size below 50 mcm, photoinitiating agent, antioxidant of phenolic type and adhesion promoter - a mixture of chlorinated polyvinyl chloride with chlorine content 62-64 wt.-% and oxalic acid, and the composition comprises additionally thixotropic agent - aerosil with specific surface 175-380 m²/g and ester plasticizing agent. Invention provides the development of UV-strengthening glue composition showing the thixotropy coefficient K = 2-3, shrinkage 4%, not above, break off strength both in the parent state and after heat effect, moisture and temperature drop 1.5 MPa, not less, and stability in storage above one year. The composition can be used as adhesive in electronic devices, such as optical reading head, thin-film transistor - mesomorphic display and organic electroluminescent unit.

EFFECT: valuable properties of composition.

5 cl, 2 tbl, 5 dwg, 8 ex