Emulsion type modification agent can be added emulsion acrylic pressure sensitive adhesive

The use of emulsion acrylic pressure-sensitive adhesive, for low surface energy substrates such as polyolefin surface adhesion, is poor. Therefore, tackifiers often need to be added to improve their sticking performance. Viscosifying resin was usually mixed with rosin resin as an emulsion acrylic pressure-sensitive adhesive. Rosin resin source is an acidic natural resin extracted from pine, pine easy to be affected by different origins, climate change and variety differences, and other conditions, resulting in the quality of the extracted rosin resin instability: and emulsion acrylic pressure sensitive adhesive and rosin resin compatibility problems, rosin resin added to excess, easy to cause a decline in adhesive properties.

Emulsion modifier is used as a viscosifying resin of emulsion acrylic pressure sensitive adhesive, and the composition of emulsion modifier includes (a) diester of a dicarboxylic acid with 6-12 carbon atoms (part per hundred) with 15-35 weight parts (phr): (6)2~16 carbon vinyl esters. l5~35phr:(c)4~8 carbon alky1 acrylates) 35~65phr: In terms of total (a)+(b)+(c) acrylates, (d) acetoacetate monomer 0.1~2.0phr: relative to.

(a)+ (b)+  (c) in terms of the total, nonionic surfactants (e) 0.1 ~ 2.0 PHR, compared with (a) + (b) + (c) in terms of the total, anionic surfactants (f) 0.4 ~ 3.0 PHR. The average particle size of the emulsion modifier is 0.1~0.4μm, the glass transfer temperature (Tg) is -30~-50℃, and the solid composition ranges from 50 to 70 % by weight.

Emulsion modification agent added emulsion acrylic pressure sensitive adhesive mixed, The adhesion force of steel peel adhesion, PE peel adhesion, loop tack, and holding power of the steel plate can be improved by adding The dosage relative to emulsion acrylic pressure sensitive adhesive is 5~30phr.