Acrylic esters oiliness pressure-sensitive glue with 60 solid content and preparation method thereof

Abstract

The present invention provides a 60-solid-content acrylic unctuous pressure-sensitive adhesive, the solid content of which is equal to or more than 60 percent, preferably 60 percent to 62 percent, and the viscosity of which is between 1000CPS and 3500CPS, preferably between 1500CPS and 2500CPS. The material formula of the 60-solid-content acrylic unctuous pressure-sensitive adhesive contains 2-ethylhexyl acrylate, butyl acrylate, winyl acetic ester, acrylic acid, molecular weight regulator, azodiisobutyronitrile, ethyl acetate, ethanol, curing agent and viscosity regulator. The present invention also provides processing steps and conditions for preparing the 60-solid-content acrylic unctuous pressure-sensitive adhesive. Since the solid content is increased, when the same dry adhesive film is coated with the 60-solid-content acrylic unctuous pressure-sensitive adhesive, the amount of the coated wet adhesive can be reduced, and cost and energy consumption are reduced. Moreover, since the viscosity of the 60-solid-content acrylic unctuous pressure-sensitive adhesive is between 1000CPS and 3500CPS, an ordinary curved scraper can be adapted to the 60-solid-content acrylic unctuous pressure-sensitive adhesive.

Description

technical field [0001] The invention belongs to the technical field of pressure-sensitive adhesives, and in particular relates to an acrylic oily pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Classified by use, there are three types of pressure-sensitive adhesives: water-based, alcohol-soluble and oil-soluble. Among them, water-based pressure-sensitive adhesives have a series of problems such as poor water resistance, low cohesion, less bonding materials, and precipitation of surfactants, so they encounter major problems in promotion; while alcohol-soluble acrylic pressure-sensitive adhesives have relatively low solid content. , the cost is relatively high, and the performance is not as good as that of oil-soluble pressure-sensitive adhesives, so there are certain limitations in popularization and application; at present, the usage of acrylate oil-based pressure-sensitive adhesives is a relatively large variety. However, oil-bas...

AI Technical Summary

Problems solved by technology

Among them, water-based pressure-sensitive adhesives have a series of problems such as poor water resistance, low cohesion, less bonding materials, and precipitation of surfactants, so they encounter major problems in promotion; while alcohol-soluble acrylic pressure-sensitive adhesives have relatively low solid content. , the cost is relatively high, and the performance is not as good as that of oil-soluble pressure-sensitive adhesives, so there are certain limitations in popularization and application; at present, the usage of acrylic oil-based pressure-sensitive adhesives is a relatively large variety

However, oil-based pressure-sensitive adhesives release a lot of heat during production, and the higher the solid content, the more difficult it is to control the reaction, and the glue with high solid content has high viscosity, which is not conducive to uniform coating. Therefore, the solid content of existing acrylate oil-based pressure-sensitive adhesives Generally controlled below 50%

Due to the characteristics of oil-based pressure-sensitive adhesives, the existing acrylic oil-based pressure-sensitive adhesives have the disadvantages of low solid content, unfavorable production process for energy saving and environmental protection, and high cost