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Polyethylene-vinyl acetate hot-melt adhesive and preparation method thereof

A technology of vinyl acetate heat and vinyl acetate, applied in the direction of adhesives, graft polymer adhesives, polyurea/polyurethane adhesives, etc., can solve the problem of decreased peel strength, high content of inorganic fillers, difficult to apply to vehicles Interior glue and other problems, to achieve the effect of improving stability, stable performance, high bonding ability and chemical resistance

Active Publication Date: 2016-01-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent publication number is CN104531007A, which prepares a kind of EVA hot melt adhesive with flame retardant properties. Due to the high content of inorganic fillers, the mechanical properties and peel strength are seriously reduced, so it is difficult to apply to the field of automotive interior adhesives.

Method used

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  • Polyethylene-vinyl acetate hot-melt adhesive and preparation method thereof
  • Polyethylene-vinyl acetate hot-melt adhesive and preparation method thereof
  • Polyethylene-vinyl acetate hot-melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: Metal-adhesive EVA-based hot-melt adhesive and its preparation

[0030] (1) Raw materials:

[0031] The ratio of raw materials in this example is shown in Table 1.

[0032] Table 1

[0033]

[0034] (2) Preparation method:

[0035] a: Heat 1 / 2 to 2 / 3 polyethylene-vinyl acetate and thermoplastic polyurethane to 140-160°C, add paraffin wax and antioxidant in proportion, after it melts, add the remaining polyethylene-vinyl acetate and thermoplastic polyurethane , to ensure that the system temperature is ≥130°C;

[0036] b: Add polypropylene grafted maleic anhydride (PP-g-MAH) in proportion to ensure that the system temperature is ≥120°C. After it melts, add rosin pentaerythritol ester and C5 hydrogenated petroleum resin, and cool down to 90-110°C. After it melts, heat and stir for 10 to 30 minutes, add an anti-aging agent, and discharge to obtain a metal-adhesive EVA-based hot-melt adhesive.

[0037] Both step a and step b are carried out at a vacuum ...

Embodiment 2

[0050] Embodiment 2: Metal-adhesive EVA-based hot-melt adhesive and its preparation

[0051] (1) Raw materials:

[0052] The ratio of raw materials in this example is shown in Table 2.

[0053] Table 2

[0054]

[0055]

[0056] (2) Preparation method:

[0057] a: Heat 1 / 2 to 2 / 3 polyethylene-vinyl acetate and thermoplastic polyurethane to 140-160°C, add antioxidant in proportion, after it melts, add the remaining polyethylene-vinyl acetate and thermoplastic polyurethane to ensure System temperature ≥ 130°C;

[0058] b: Add polypropylene grafted maleic anhydride (PP-g-MAH) in proportion to ensure that the system temperature is ≥120°C. After it melts, add rosin pentaerythritol ester and C5 hydrogenated petroleum resin, and cool down to 90-110°C. After it melts, heat and stir for 10 to 30 minutes, add an anti-aging agent, and discharge to obtain a metal-adhesive EVA-based hot-melt adhesive.

[0059] Both step a and step b are carried out at a vacuum degree of 0.1-0.5 ...

Embodiment 3

[0072] Embodiment 3: Metal-adhesive EVA-based hot-melt adhesive and its preparation

[0073] (1) Raw materials:

[0074] The ratio of raw materials in this example is shown in Table 3.

[0075] table 3

[0076]

[0077]

[0078] (2) Preparation method:

[0079] a: Heat 1 / 2 to 2 / 3 polyethylene-vinyl acetate and thermoplastic polyurethane to 140-160°C, add paraffin wax and antioxidant in proportion, after it melts, add the remaining polyethylene-vinyl acetate and thermoplastic polyurethane , to ensure that the system temperature is ≥130°C;

[0080] b: Add polypropylene grafted maleic anhydride (PP-g-MAH) in proportion to ensure that the system temperature is ≥120°C. After it melts, add rosin pentaerythritol ester and C5 hydrogenated petroleum resin, and cool down to 90-110°C. After it melts, add an anti-aging agent, keep warm and stir for 10-30 minutes, and discharge to obtain a metal-adhesive EVA-based hot-melt adhesive.

[0081] Both step a and step b are carried ou...

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Abstract

The invention relates to a polyethylene-vinyl acetate hot-melt adhesive and a preparation method thereof. The preparation method comprises the following steps: mixing 1 / 2-2 / 3 of polyethylene-vinyl acetate with 1 / 2-2 / 3 of thermoplastic polyurethanes by weight, heating the mixture, adding 0-3 parts of paraffin and 0.5-1 part of antioxidants into the heated mixture, adding the remaining polyethylene-vinyl acetate and the remaining thermoplastic polyurethanes after the added components are melted completely, and holding a temperature to be greater than or equal to 130 DEG C; and adding 5-15 parts of PP-g-MAH, holding the temperature to be greater than or equal to 120 DEG C, adding pentaerythritol rosin ester and a C5 hydrogenation petroleum resin, reducing the temperature to be 90-110 DEG C, adding an anti-aging agent after the pentaerythritol rosin ester and the C5 hydrogenation petroleum resin are melted completely, holding the temperature and stirring the mixture for 10-30 minutes to obtain the hot-melt adhesive. The polyethylene-vinyl acetate hot-melt adhesive provided by the invention is high in strength and good in toughness, and does not cause secondary pollution to the environment. An automobile-used hot-melt adhesive prepared from the adhesive has high adhesion ability and high chemical stability, and can be used in the field of automobile interior adhesion.

Description

technical field [0001] The invention relates to a polyethylene-vinyl acetate (EVA)-based hot-melt adhesive and a preparation method thereof, in particular to a polyethylene-vinyl acetate (EVA)-based hot-melt adhesive with metal adhesion and a preparation method thereof. technical background [0002] Polyethylene-vinyl acetate (EVA)-based hot-melt adhesive is the most widely used hot-melt adhesive system. It is widely accepted by the market for its low cost, convenient preparation and use. Previously, EVA-based hot melt adhesives were mainly used in home decoration, leather product bonding, packaging and other fields. The patent publication number is CN104531007A, which prepares a flame-retardant EVA hot-melt adhesive. Due to the high content of inorganic fillers, the mechanical properties and peel strength are severely reduced, so it is difficult to apply to the field of automotive interior adhesives. With the increasing use of rubber for automobiles, the reduction of its c...

Claims

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Application Information

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IPC IPC(8): C09J123/08C09J151/06C09J157/02C09J175/04C09J191/06C09J11/06
Inventor 郭卫红崔中纹李壮张伟健栗艮艮闫玮楼飞鹏成立鸿王权
Owner EAST CHINA UNIV OF SCI & TECH
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