Single-component waterborne polyurethane automotive trim adhesive and preparation method thereof

Abstract

The invention discloses a single-component waterborne polyurethane automotive trim adhesive which consists of the following components in parts by weight: 10-50 parts of a polyurethane emulsion of medium activation temperature, 20-40 parts of a polyurethane emulsion with low activation temperature, 30-70 parts of a vinyl acetate-ethylene emulsion, 5-20 parts of an aqueous sealing type polyisocyanate cross-linking agent, 0.1-0.3 part of a pH adjusting agent, 0.1-1.0 part of a thickening agent, 0.05-0.50 part of an aqueous defoaming agent, 0.5-8 parts of a tackifying emulsion, 1-10 parts of an adhesion promoter and 0.05-0.30 part of a toner. The single-component waterborne polyurethane automotive trim adhesive can be naturally dried in air at room temperature without a drying tunnel or adhesive spraying, can be used for adhering roofs and surface materials within two weeks, has relatively long opening time and wide market prospects and is worthy of wide popularization.

Description

technical field [0001] The invention relates to a water-based adhesive for automobile interior decoration, in particular to a one-component water-based polyurethane automobile interior decoration adhesive and a preparation method thereof. Background technique [0002] With the popularization of automobiles in modern people's life as a common means of transportation, automobiles have become the main living space of the rapidly increasing car owners in our country. Therefore, the quality of the environment in the car is particularly important to people's health. The source of environmental pollution in the car mainly comes from the automotive interior materials and the adhesives that provide bonding. Traditional solvent-based adhesives not only pose a great threat to the health of construction workers, but also seriously pollute the environment. In addition, after the interior parts produced by solvent-based adhesives are assembled into cars, the residual organic solvents wi...

AI Technical Summary

Problems solved by technology

[0003] At present, the mainstream manufacturers of interior parts such as car roofs and door panels mainly use two-component water-based adhesives obtained by compounding heat-activated water-based polyurethane emulsions and water-dispersed isocyanate curing agents in a certain proportion. Due to the short operation time of water-based glue, after the glue is sprayed and dried, the base material and fabric must be bonded in a very short time, otherwise the bonding performance of the glue will be seriously reduced or even lose its bonding ability.

In addition, due to the short operation time, water-based polyurethane emulsion and curing agent often need to be stored separately, and it is inconvenient to prepare and use on-site

In addition, a separate drying tunnel needs to be set up to dry the adhesive to remove moisture, and the energy consumption is high, which limits further application in automotive interiors