A kind of screen-printable pressure-sensitive adhesive composition

Abstract

The invention relates to pressure-sensitive adhesive, in particular to a pressure-sensitive adhesive composition capable of being used for silk-screen printing. The pressure-sensitive adhesive composition capable of being used for silk-screen printing is composed of a component A, a component B, a component C, a component D, a component E and a component F, wherein the component A is normal pressure-sensitive adhesive, the component B is a thickening agent, the dosage of the component B is 0.1-3% of that of the component A, the component C is a flatting agent, the dosage of the component C is 0.05-0.5% of that of the component A, the component D is a solvent having a certain swelling property on the emulsion particles in the pressure-sensitive adhesive of the component A, the dosage of the component D is 1-10% of that of the component A, the component E is a solvent having no wetting ability on the silk-screen printing material nylon, and the dosage of the component E is 1-5% of that of the component A, the component F is a non-ionic mildew preventive agent, and the dosage of the component F is 0.01-0.1% of that of the component A. The pressure-sensitive adhesive composition capable of being used for silk-screen printing is quite large in viscosity, fast and complete in blanking, free of sticking meshes, good in leveling effect, and free of bubbles and pits after the adhesive layer is dried.

Description

technical field [0001] The invention relates to a pressure-sensitive adhesive, in particular to a screen-printable pressure-sensitive adhesive. Background technique [0002] Pressure-sensitive adhesive is a kind of polymer emulsion, which is formed by emulsifying acrylic acid monomer into water and adding an appropriate amount of thermal initiator for heating. The system must be in an oxygen-free environment during synthesis ("Principle, Performance and Application of Polymer Emulsion Synthesis" (p. Second Edition) "Cao Tongyu, Liu Qingpu, Hu Jinsheng edited, Chemical Industry Press). There are so many patents on the synthesis of pressure-sensitive adhesives, try to list one or two. The pressure-sensitive adhesive disclosed in CN1824721 is composed of 54 to 58 parts of water, 0.30 to 0.40 parts of sodium lauryl sulfate, 0.32 to 0.42 parts of ammonium persulfate, and a mixture of 41 to 45 parts, and an appropriate amount of ammonia water, wherein the mixed material is made b...

AI Technical Summary

Problems solved by technology

The inventors of the present invention have found that common emulsions are difficult to carry out screen printing in actual practice, mainly because the viscosity of general emulsions is too small, and after silk printing, they are too thin to be leveled and thus leave grid lines. The thickening of the thickener can increase the viscosity many times, but it cannot be leveled after silk screen printing, because thickening means poor leveling, and the adhesive force of the glue itself to the screen is too strong, so the screen will bounce from the glue plane. Leave a grid pattern after opening