Research and development background of environmental protection low-temperature water-based acrylate copolymer adhesive

The film made of polyacrylate latex has good properties of time, phase aging, jet oil, and acid-base, and it has good adhesion properties for fiber, leather, paper, and so on. Therefore, latex is widely used in coating, fabric, and tanning. In the application of fabric, it is mainly used as a printing and dyeing adhesive, fabric coating agent, wakeup agent, anti-pilling agent, adhesive for non-woven products, etc.

Water-based acrylic copolymerization latex development through non-crosslinking, diplomatic, and white crosslinking three stages, but these crosslinking conditions are relatively high, the need for high temperature (about 160℃) and low pH value, not only a waste of resources, but also increase the damage to the processing of the substrate, and the application process also released harmful to human body formaldehyde substances.

To implement water-based acrylic ester copolymer latex crosslinking at low temperatures, some people use the method of external catalyst: using a mixture of magnesium chloride hexahydrate and citric acid (volume ratio 1: 1), such as Azcat A catalyst as a two-component low-temperature curing adhesive, but the main shortcomings are used with catalyst, more trouble, and configuration stability, the residual pulp can not be reused. Another approach is to use radiation-induced crosslinking technology, but this requires additional specialized equipment, at a relatively high cost. Reactive epoxides have been introduced by reacting with epichlorohydrin to replace the formaldehyde-releasing substance N hydroxymethyl acrylamide, but the problem with this technique is that AOX pollution is added to the environment.

The technical problem to be solved is to overcome the above shortcomings and design a kind of macromolecule with a special structure and its preparation method so that the formed latex main body has a certain degree of pre-crosslinked network structure but a nonlinear macromolecule. The invention provides a preparation method for an environmentally friendly low-temperature water-based acrylate copolymerization adhesive. The method is to introduce a certain degree of crosslinking into macromolecules in the polymerization process by adding crosslinking components containing two or more of two diethers into the poly monomer to participate in the copolymerization.