Hot-melt pressure sensitive adhesive for waterproof rolls, and preparation method thereof

Abstract

The invention provides a hot-melt pressure sensitive adhesive for waterproof rolls, and a preparation method thereof, and belongs to the technical field of adhesives. The problems of poor heat resistance and poor adhesion to a concrete substrate of existing hot-melt pressure sensitive adhesive for waterproof rolls are solved. The hot-melt pressure sensitive adhesive for waterproof rolls comprises5-30 wt% of a thermoplastic elastomer, 5-15 wt% of a saturated thermoplastic elastomer, 25-50 wt% of tackifying resin, 15-40 wt% of a plasticizer, 0.5-5 wt% of an silicone additive and 0.5-5 wt% of astabilizer, wherein the silicone additive is prepared by a controlled condensation reaction of different silane monomers. The hot-melt pressure sensitive adhesive for waterproof rolls has the advantages of good heat resistance and good adhesion to the concrete substrate, and the preparation method of the pressure sensitive adhesive has the advantages of simple preparation process, low cost and good economic values.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a pressure-sensitive adhesive for waterproof coiled material and a preparation method thereof Background technique [0002] Pressure-sensitive adhesive is a kind of self-adhesive substance, which can be firmly bonded to the adherend by forming van der Waals force on the surface of the two objects only by applying a small pressure. According to different bearing media, pressure-sensitive adhesives can be divided into four types: solvent type, emulsion type, light-curing type and hot-melt type (see Pang Yanmei et al., "China Adhesives", 2018, 27: 51.). Among them, the hot-melt pressure-sensitive adhesive integrates the dual characteristics of hot-melt and pressure-sensitive. It is coated in a molten state, and can be bonded by applying a small finger pressure after cooling and solidification. It can be widely used in packaging, binding, and heat treatment. Sealing and pressure s...

AI Technical Summary

Problems solved by technology

In addition, due to the use of non-polar polymers in thermoplastic polymers, the adhesion to some polar substrates such as paper, wood, and concrete is not strong, especially when used in waterproof membranes, due to the adhesion to the substrate Defects lead to leakage, water stringing and other phenomena

It is usually improved by adding a polar tackifying resin, which is easy to operate, but the introduction of the tackifying resin will affect the cohesion of the adhesive, so the improvement effect is limited

There are also researchers who introduce polar polymeric segments when synthesizing thermoplastic elastomers to form tetrablock copolymers (see Zhao Z. et al., "Bonding Science and Technology", 2014, 28:1090.), or Polar units are introduced by introducing polar monomers such as acrylate and vinyl acetate to polymerize with double bonds in SBCs, but improper reaction control can easily cause violent polymerization or crosslinking, and solvents need to be introduced to increase environmental pollution ( See Zhou Weiping, "Chemistry and Adhesion", 2006, 28:102)

Images