A kind of GM graft modified polyvinyl acetate-based reverse core-shell emulsion and preparation method thereof

A polyvinyl acetate-based, graft-modified technology, applied in the direction of graft polymer adhesives, adhesive types, adhesives, etc., can solve the problem of limiting the practical application of emulsion adhesives and affecting the uniformity and stability of emulsions , uneven particle size of latex particles, etc., to achieve the effect of improving the adhesive compressive shear wet strength, regular shape without adhesion, and uniform particle size
CN108276536BActive Publication Date: 2020-05-19NORTHEAST FORESTRY UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEAST FORESTRY UNIVERSITY
Publication Date
2020-05-19

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Abstract

The invention relates to glycidyl methacrylate (GMA) graft modified polyvinyl acetate-based reverse core-shell emulsion and a preparation method thereof, belonging to the technical field of emulsion adhesive. The GMA graft modified polyvinyl acetate-based reverse core-shell emulsion is mainly prepared from a first core layer monomer, a second core layer monomer, a shell layer monomer, a graft monomer, a composite emulsifier, an initiator, a pH buffering agent, deionized water and a functional monomer, wherein the first core layer monomer is vinyl acetate, the second core layer monomer is butylacrylate, the shell layer monomer is styrene, the graft monomer is maleic anhydride, the composite emulsifier is a mixture of PCA507 and PCA078, the initiator is ammonium persulfate, the pH buffer isNaHCO3, and the functional monomer is GMA. The raw materials used in the preparation method are cheap and easy to obtain; the prepared functional monomer GMA modified core-shell composite emulsion type adhesive is non-toxic, harmless and simple in production and use process, and can be directly used as water-based adhesive.
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Description

technical field

[0001] The invention belongs to the technical field of emulsion adhesives, and in particular relates to a GMA graft-modified polyvinyl acetate-based reverse core-shell emulsion and a preparation method thereof. Background technique

[0002] Traditional polyvinylacetate (PVAc)-based emulsion adhesives have disadvantages such as poor water and heat resistance. By constructing a polyvinylacetate-based reverse core-shell structure emulsion, styrene (Styrol, St) can be introduced into the surface of latex particles. A shell polymer that is difficult to carry out traditional copolymerization and has excellent performance, which improves the water resistance, heat resistance and creep resistance of the emulsion, while maintaining the film-forming and adhesive properties of the original emulsion film. Constructing a reverse core-shell structured emulsion with polyvinyl acetate as the core and polystyrene as the shell can significantly improve the compressive shear st...

Claims

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