Water-soluble composite adhesive and preparation method therefor

Abstract

The invention belongs to the field of composite adhesives and discloses a water-soluble composite adhesive. The water-soluble composite adhesive is prepared from the following raw materials in parts by weight: 30-50 parts of polyisocyanate, 15-25 parts of water-soluble high polymer, 10-20 parts of polyol, 4-8 parts of emulsifier, 3-6 parts of stabilizer, 2-4 parts of initiator, 15-25 parts of kaolin and the balance of deionized water. The water-soluble composite adhesive disclosed by the invention is low in moisture content, high in drying speed, difficult in deformation and low in dosage andis not absorbed by adhered objects, and thus, the production cost is reduced greatly; the water-soluble composite adhesive prepared by a preparation method disclosed by the invention is stable in performance, excellent in weather resistance and good in compounding fastness; the water-soluble composite adhesive prepared by taking the polyisocyanate, the water-soluble high polymer, the polyol, the kaolin and the like as main raw materials has relatively high bond strength and impact toughness; and the kaolin has a relatively good thickening effect, so that the precipitation of the prepared water-soluble composite adhesive is avoided, and the kaolin can exert a dispersing action.

Description

technical field [0001] The invention relates to the technical field of composite glue, in particular to a water-soluble composite glue and a preparation method thereof. Background technique [0002] Composite glue is used for bonding and compounding between two or more layers of materials. It is the main raw material for the production of material packaging composite films. The composite glue can be divided into one-component glue and two-component glue, which can be divided according to the solvent used. It is traditional solvent-based adhesive, alcohol-soluble adhesive and water-soluble composite adhesive. [0003] Among them, environment-friendly composite adhesives, that is, alcohol-soluble and water-soluble composite adhesives, have become the focus of research and application at home and abroad in recent years. Traditional water-soluble composite adhesives contain a lot of water when used, resulting in slow drying of the composite adhesive and poor adhesion. The perfo...

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Problems solved by technology

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a water-soluble composite glue and its preparation method, which has the advantages of less water content and good bonding performance, and solves the problem of the traditional water-soluble composite glue containing The amount of water is too much, which leads to the slow drying speed of the composite glue, and the bonding performance is not very good.