Processing method of PUR product with high initial adhesion and long opening time

Abstract

The invention discloses a processing method of a PUR product with high initial adhesion and long opening time. The processing method comprises the following steps: S1: preparing: preparing a reactionkettle in advance, and preparing the following raw materials in parts by weight: 15 parts of SBS rubber, 18 parts of crystal polyester, 22 parts of liquid resin, 10 parts of tackifying resin, 5 partsof tackifying resin, 15 parts of a plasticizer, and 15 parts of MID; S2: pretreating: placing the SBS rubber in S1 into the reaction kettle in S1, thus obtaining an SBS rubber reactant; and S3: injecting a solvent: injecting the solvent into the reaction kettle with the added SBS rubber in step S2, and performing the swelling treatment, thus obtaining the swelled SBS rubber raw material. The processing method has the advantages of reasonable design and high practicability; and the PUR product prepared by the processing method has the advantages of relatively simple and convenient technologicaloperation, has the characteristics of high initial adhesion strength, low application temperature and the like, and is suitable for the industrial production, and the production efficiency is relatively high.

Description

technical field [0001] The invention relates to the technical field of PUR product processing, in particular to a PUR product processing method with high initial viscosity and long open time. Background technique [0002] PUR (Polyurethane Reactive) is called moisture curing reactive polyurethane hot melt adhesive in Chinese. The main component is isocyanate-terminated polyurethane prepolymer. The adhesion and toughness (elasticity) of PUR can be adjusted, and it has excellent bonding strength, temperature resistance, chemical corrosion resistance and aging resistance. It has become one of the important varieties in the adhesive industry. Now it is widely used in packaging, wood processing, automobile, textile, electromechanical, aerospace and other national economic fields. [0003] In the fields of panel veneer, honeycomb panel production, and composite door panel production, manufacturers have been using white latex in the past, and most of them are two-component polyu...

AI Technical Summary

Problems solved by technology

Due to the lack of environmental protection requirements and low production efficiency, these two glues are gradually being replaced by PUR hot melt adhesive process

Currently available PUR hot melt adhesives for this type of application in the market, some have insufficient initial adhesion and need to increase the holding time, and some have the problem that the service temperature is too high, which shortens the service life of the customer's rubber roller.