Single-component high-heat-resistance vacuum forming adhesive and preparation method thereof

Abstract

The invention discloses a single-component high-heat-resistance vacuum forming adhesive and a preparation method thereof. The vacuum forming adhesive comprises the following components in parts by weight: 20 to 50 parts of a VAE emulsion, 40 to 60 parts of a PUD emulsion, 2 to 10 parts of a modified VAE emulsion, 5 to 8 parts of waterborne blocked isocyanate, 2 to 5 parts of polycarbodiimide resin, 0 to 0.1 part of a pH regulator, 0.1 to 0.2 part of a defoaming agent, 0.1 to 0.2 part of a dispersing agent and 0.3 to 0.5 part of a thickening agent. The vacuum forming adhesive can be used and stored in a single-component manner, has no active period limitation and is convenient to operate; after closed isocyanate is heated, activated and unsealed, a final product has heat resistance of 80 DEG C, which exceeds the heat resistance temperature of a double-component vacuum forming adhesive. The activation temperature of the single-component high-heat-resistance vacuum forming adhesive is about 55 DEG C, so heating and cooling discharging time of a workpiece is saved in practical application, and working hours are reduced. The single-component high-heat-resistance vacuum forming adhesiveis small in particle size, good in atomization effect and good in the surface effect of formed highlight PVC.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a single-component high heat-resistant vacuum-absorbing adhesive and a preparation method thereof. Background technique [0002] With the improvement of people's material level, the level of interior decoration requirements continues to increase. The whole house customization that has emerged in recent years and the popularity of customized furniture have prompted explosive growth in panel furniture decoration. Among them, the panel furniture of PVC molded board is favored by many people. Its base material is density board, and the surface is formed by vacuum plastic absorption or a seamless PVC film pressing molding process. The advantage of this kind of furniture is that it is environmentally friendly. It does not need to use paint, and it is replaced by environmentally friendly PVC materials. There will be no release of harmful substances VOC in the later stage,...

AI Technical Summary

Problems solved by technology

However, adhesives with low activation temperature often have insufficient heat resistance. In vacuum blistering of high-gloss films and thicker PVC films, curing agents are often used to enhance the adhesive force of the adhesive.

The heat resistance can be improved to 70-75°C by adding a curing agent through two components, but due to the limitation of the active period of the two components, it can only be used for two hours after deployment, which brings operational restrictions and glue waste to the on-site construction.