Emulsion for seal adhesive at normal temperature and preparation method thereof

Abstract

The invention discloses an emulsion for seal adhesive at a normal temperature and a preparation method and an application thereof. The emulsion is composed of styrene or methyl methacrylate, butyl acrylate, methyl acrylate, adhesive force acceleration monomer, tackifying resin (specific gravity in the gross mass of all monomers of the system), emulsifier, initiator, pH value modifier, tert-butyl hydroperoxide, deionized water and buffer. Firstly, the tackifying resin is fully dissolved in the monomer, and the monomer dissolved with the tackifying resin is pre-emulsified; other components are preformed with dripping preparation by continuous dripping technology to obtain emulsion. The emulsion can be respectively prepared into two systems of styrene-acrylic emulsion and pure acrylic acid emulsion, and the synthetic emulsion has higher base material adhering property and low initial adhesive, and not only can ensure glue solution compounded by the emulsion has high stripping strength, but also can be stored at different environment temperatures without conglutination, so that the invention greatly satisfies each property index of a cold sealing adhesive system.

Description

technical field [0001] The invention relates to an emulsion and a preparation technology thereof, in particular to an emulsion used in a normal temperature sealing adhesive system and a preparation method thereof, in particular to a synthesis technology of an emulsion used in a cold sealing adhesive system. Background technique [0002] Normal temperature sealing adhesives are mainly used for systems that are not suitable for sealing in hot environments, such as chocolate in packaging sealing. The performance of the product determines that it cannot be carried out at a higher temperature. It is required that the adhesive sealing system can only be used at a certain temperature. , Sealing under pressure conditions. Therefore, in the use of the glue solution, it is required that the system can have good adhesion to the substrate, increase the adhesive strength of the system, and improve the sealing performance of the sealing part; it is also required that the glue solution sys...

AI Technical Summary

Problems solved by technology

Therefore, in the use of the glue solution, it is required that the system can have good adhesion to the substrate, increase the adhesive strength of the system, and improve the sealing performance of the sealing part; it is also required that the glue solution system after coating film formation and drying should be stored at room temperature In this state, there should not be too strong adhesion to the back of the substrate, and there should be no large initial adhesion. If the initial adhesion is too high, the risk of back adhesion will easily occur during the process of gluing and winding, and the back adhesion will easily damage the seal. combined strength

These properties cannot be provided simply by relying on natural latex with high pressure sensitivity and cohesive strength. For example, it is required that the emulsion has high adhesion to the substrate, because natural latex has poor adhesion to organic substrates, so The key to the preparation of this type of adhesive is to produce an emulsion that can improve the adhesion of the glue system and is not prone to back-adhesion