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High-performance low-cycle impregnating adhesive as well as preparation method and use method thereof

A high-performance dipping glue technology, which is applied in the field of high-performance low-period dipping glue and its preparation, can solve the problems of limiting the application of melamine-formaldehyde resin, melamine-formaldehyde resin is brittle, and has weak impact resistance, so as to improve curing efficiency, Good for toughness and low cost

Pending Publication Date: 2021-11-26
GUANGDONG FUMEI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, melamine formaldehyde resin is brittle, its impact resistance is weak, and the drying and curing cycle is long, which greatly limits the application of melamine formaldehyde resin.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Method for preparing high performance low-cycle impregnation gum, including steps:

[0022] (1) Preparation of the polyurethane prepolymer: 25 parts by weight of the alcoholic oil, 35 parts by weight of polyethylene glycol, 20 parts by weight of a diisocyanate and 0.2 parts by weight of catalyst, warmed to 65 ° C, the insulation reaction was 3.5 h, resulting in a hydroxy-blocking polyurethane prepolymer;

[0023] (2) Preparation of impregnation: 6 parts by weight of the polyurethane prepolymer was added to 85 parts by weight of melamine, warmed to 85 ° C, thermal insulation reaction 1.5 h, cooling 65 ° C, adding 75 parts by weight The mass fraction is 35% aqueous solution and 25 parts by weight of urea, and the alkaline regulator is added, the pH is adjusted to 9.0, the temperature is warmed for 45 min, then the acidic regulator, adjust the pH to 5.8, and add 15 parts by weight of polyvinyl alcohol, thermal insulation reaction for 25 min, and the alkaline regulator was adde...

Embodiment 2

[0033] Method for preparing high performance low-cycle impregnation gum, including steps:

[0034] (1) Preparation of a polyurethane prepolymer: 20 parts by weight of the alcoholic oil, 25 parts by weight of polyethylene oil, and 10 parts by weight of the diisocyanate and 0.1 parts by weight of the catalyst were heated to 60 ° C, insulation reaction for 3 h, resulting in a hydroxyl-blocking polyurethane prepolymer;

[0035] (2) Preparation of impregnation: 4 parts by weight of the polyurethane prepolymer added 4 parts by weight of the acetic acid and 15 parts by weight of melamine, warmed to 80 ° C, heat insulation reaction for 1 h, cooling 60 ° C, add 70 parts by weight The fraction was 40% of the aqueous solution of formaldehyde and 20 parts by weight of urea, and the alkaline regulator was added, the pH is adjusted to 8.5, and the temperature was tapered to 80 ° C, and the insulation reaction was 30 min, then the acidic regulator was added to 5.5, and 10 The weight of polyvinyl...

Embodiment 3

[0045] Method for preparing high performance low-cycle impregnation gum, including steps:

[0046] (1) Preparation of the polyurethane prepolymer: 30 parts by weight of the glycolysis of the alcohol, 45 parts by weight of polyethylene oil, 30 parts by weight of the polyethylene oil, and 0.3 parts by weight of the catalyst, temperature rise to a 20 parts by weight of the polyethylene oil, 30 parts by weight of the catalyst. 70 ° C, insulation reaction for 4 h, resulting in a hydroxy-blocking polyurethane prepolymer;

[0047] (2) Preparation of dip glue: 8 parts by weight of the polyurethane prepolymer was added to a polyacetate and 25 parts by weight of melamine, warmed to 90 ° C, heat insulation reaction for 2 h, cooling at 70 ° C, and added 80 parts by weight The fraction is 40% of the aqueous solution of formaldehyde and 30 parts by weight of urea, and the basic modulator is added, the pH is adjusted to 9.5, and the temperature is tapered to 90 ° C, the temperature is 60 min, th...

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Abstract

The invention relates to the technical field of impregnating adhesives, in particular to a high-performance low-cycle impregnating adhesive and a preparation method and a use method thereof. The preparation method comprises the following steps: (1) preparing a polyurethane prepolymer; and (2) preparing the impregnating adhesive. In the synthetic process of the impregnating adhesive, a hydroxyl-terminated polyurethane prepolymer can be subjected to a grafting modification reaction with melamine under the catalysis of acetic acid and continuously react with formaldehyde and urea to form semi-interpenetrating network resin, so that the mechanical properties of the impregnating adhesive are improved through the characteristics of polyurethane; and through the dense network structure, the curing efficiency is improved, the formaldehyde consumption is relatively reduced, and the adhesive is more environmentally friendly and safer.

Description

Technical field [0001] The present invention relates to the field of impregnating adhesive technology, and more particularly to a high performance low-cycle impregnated glue and a method of preparation thereof and a method of use. Background technique [0002] The impregnated paper is mainly produced by the original paper. After drying, drying after impregnation, it is covered with a substrate, and the hot press bonding forms a decorative paper, improves the aesthetics of the human panel. The currently impregnated synthetic resin is mainly phenolic resin, urea resin, and melamine formaldehyde resin, wherein the melamine formaldehyde resin is the most common in the current market with its higher cost performance, the most widely used impregnation resin. [0003] However, melamine formaldehyde resin is fragile, and the impact resistance is weak, and the dry curing cycle is longer, which greatly limits the application of melamine formaldehyde resin. Inventive content [0004] In or...

Claims

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Application Information

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IPC IPC(8): D21H27/28D21H17/57D21H17/53D21H17/07D21H17/36D21H17/02D21H17/06D21H17/67C08G12/46
CPCD21H27/28D21H17/57D21H17/72D21H17/53D21H17/07D21H17/36D21H17/02D21H17/06D21H17/675D21H17/74C08G12/46
Inventor 李英朱红袁艺宁
Owner GUANGDONG FUMEI NEW MATERIAL TECH CO LTD
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