Aqueous laminating adhesive and method for making same

Abstract

The invention discloses aqueous composite membranes glue which comprises component A: butyl acrylate, styrene, acrylic acid, acrylic acid-2-hydroxypropyl, diallyl phthalate, phenolic ether sulfuric acid and softened water, component B: softened water, emulsifying agent comprising phenolic ether sulfuric acid, alkyl phenol ether and 1-propenyloxy-2-hydroxyl propane sodium sulfonate, sodium bicarbonate and ammonium persulphate, component C: ammonium persulphate and softened water, and component D: 20 percent of ammonia water. The component A is added in a pre-emulsifying tank, and 2 to 5 percent of the component A is taken out as seed liquid after emulsification; the component C is added in an initiator tank to react; the component B which is added in a reaction kettle is stirred to heat up, and then the seed liquid is added and is heated up continuously with the temperature kept between 80 to 90 DEG C; meanwhile, the component C and the residual component A are added drop by drop; after 1.5-hour heat preservation the temperature is cooled down; when the temperature is lower than 40 DEG C, the component D is added finally, the mixture is filtered for discharging. The invention has high safety, aqueous environmental protection and low cost, and is easy for industrialized production; moreover, the invention has high transparence, strong power-covering capability, fast drying speed, good heat endurance and freezeproof property and excellent initial viscidity and hold tack.

Description

1. Technical field [0001] The invention relates to an adhesive and a production method thereof, in particular to a water-based laminating adhesive and a production method thereof. 2. Background technology [0002] At present, there is a kind of packaging material of laminated paper on the market, which is not only bright and beautiful, but also wear-resistant and waterproof, so it is widely used. This material is made by bonding polypropylene (BOPP), polyester (PET) or polyvinyl chloride (PVC) to paper with an adhesive. The adhesive used is laminating adhesive. Laminating adhesives in the Chinese market can be divided into the following three types: hot melt, organic solvent and water-based laminating adhesives. Hot-melt laminating adhesive adopts the method of pre-coating film, which is inconvenient to use, has low adhesion, and is not suitable for subsequent processing, so it is seldom used. Organic solvent-based laminating adhesives use a large amount of organic solven...

AI Technical Summary

Problems solved by technology

Although it has met the requirements of safety and environmental protection to a certain extent, it is only suitable for low-grade or thin-ink packaging materials, and still has the disadvantages of narrow application range, low production efficiency, poor powder covering ability, and insufficient holding force.

The other is thermal compounding. This type of technology is mainly controlled by developed countries in Europe and the United States, and the product price is high.

Although there are some reports in China, most of them use butyl acrylate and methyl methacrylate as the main monomers, and their high cost limits their promotion.