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Filler capable of improving heat-resistant strength of EVA hot melt adhesive

A heat-resistant strength and filler technology, applied in the direction of polymer adhesive additives, non-polymer adhesive additives, adhesive additives, etc., can solve stress crack resistance, tensile strength, toughness decline, elongation at break, etc. Elongation, flexural strength, hardness attenuation, general heat resistance, etc., to achieve the effect of reducing curing shrinkage, increasing melt index, and improving heat resistance

Inactive Publication Date: 2018-12-11
ANHUI SOYA DECORATIVE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common fillers include calcium carbonate, barium sulfate, magnesium sulfate, magnesium oxide, etc., the amount added accounts for about 20-50% of the mass of the hot melt adhesive, and its heat resistance is average. When the temperature rises, due to the excessive amount added, Particles are diffused in the melt, and its stress cracking resistance, tensile strength, toughness, etc. are greatly reduced, resulting in extreme attenuation of elongation at break, yield strength, and hardness

Method used

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  • Filler capable of improving heat-resistant strength of EVA hot melt adhesive

Examples

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Effect test

Embodiment 1

[0018] A filler for improving the heat-resistant strength of EVA hot-melt adhesives, which is made of the following components in parts by weight: 12 parts of silicon dioxide, 3.5 parts of xonotlite, 1.8 parts of graphite flakes, 1.0 parts of aluminum silicate fiber, six 0.5 parts of potassium titanate, 5 parts of polyvinyl alcohol, 3 parts of starch, 25 parts of concentrated sulfuric acid, 1.5 parts of hydrogen peroxide, 15 parts of distilled water, and 30 parts of deionized water. The preparation method includes the following steps:

[0019] (1) Grind silicon dioxide and xonotlite into 150-mesh powder, put them into a four-necked flask together with graphite flakes, add concentrated sulfuric acid dropwise through a separatory funnel under cooling in an ice-water bath at 0°C and mechanically stir for 35 Minutes, then add potassium hexatitanate, react at 15°C for 2 hours, then slowly add deionized water to dilute, and raise the temperature to 60°C;

[0020] (2) Add hydrogen pe...

Embodiment 2

[0028] A filler for improving the heat-resistant strength of EVA hot-melt adhesives, made of the following components in parts by weight: 13 parts of silicon dioxide, 3.6 parts of xonotlite, 1.9 parts of graphite flakes, 1.2 parts of aluminum silicate fiber, six 0.6 parts of potassium titanate, 6 parts of polyvinyl alcohol, 3.5 parts of starch, 28 parts of concentrated sulfuric acid, 1.8 parts of hydrogen peroxide, 18 parts of distilled water, and 35 parts of deionized water. The preparation method includes the following steps:

[0029] (1) Grind silicon dioxide and xonotlite into 160-mesh powder, put them into a four-neck flask together with graphite flakes, add concentrated sulfuric acid dropwise through a separatory funnel under cooling in an ice-water bath at 1°C and mechanically stir for 40 Minutes, then add potassium hexatitanate, react at 18°C ​​for 2.5 hours, then slowly add deionized water to dilute, and raise the temperature to 65°C;

[0030] (2) Add hydrogen peroxid...

Embodiment 3

[0038] A filler for improving the heat-resistant strength of EVA hot-melt adhesives, made of the following components in parts by weight: 15 parts of silicon dioxide, 3.8 parts of xonotlite, 2.0 parts of graphite flakes, 1.5 parts of aluminum silicate fiber, six 0.8 parts of potassium titanate, 7 parts of polyvinyl alcohol, 4 parts of starch, 30 parts of concentrated sulfuric acid, 2.0 parts of hydrogen peroxide, 20 parts of distilled water, and 40 parts of deionized water. The preparation method includes the following steps:

[0039] (1) Grind silicon dioxide and xonotlite into 180-mesh powder, put them into a four-neck flask together with graphite flakes, add concentrated sulfuric acid dropwise through a separatory funnel under cooling in an ice-water bath at 2°C and mechanically stir for 45 Minutes, then add potassium hexatitanate, react at 20°C for 3 hours, then slowly add deionized water to dilute, and raise the temperature to 70°C;

[0040](2) Add hydrogen peroxide dropw...

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Abstract

The invention relates to the technical field of chemical materials, and discloses a filler capable of improving heat-resistant strength of an EVA hot melt adhesive. Inorganic materials such as ilicondioxide are adopted to be compounded with aluminum silicate fibers, so as to form a solid network structure; polyvinyl alcohol is adopted to improve the compatibility of a composite modified materialwith the EVA resin; the prepared filler can be tightly connected with EVA resin molecule, so that the crystallinity is changed, the melt index is improved, and the cure shrinkage is reduced; the meltadhesive in a molten state has better fluidity, the wetting property thereof is not influenced, the stress cracking property, tensile strength and tenacity of the melt adhesive are improved, and the breaking elongation, the yield strength and the rigidity are about 3-4 times of common levels; the filler dosage is 20-25% of a common filler, so that the cost is saved. By virtue of utilizing microstructure changes to determine macroscopical performances, the filler is capable of obviously improving the heat-resistant strength of the EVA hot melt adhesive, and realizing practical significance of high-quality low-cost production of hot melt adhesives, thereby being a technical scheme worthy of popularization and use.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a filler for improving the heat-resistant strength of EVA hot-melt adhesives. Background technique [0002] EVA hot melt adhesive is a solid meltable polymer that does not require solvents and does not contain 100% moisture; it is solid at room temperature, and when heated and melted to a certain temperature, it becomes a fluid and viscous liquid. The melted EVA hot melt adhesive is light brown or white. EVA hot melt adhesives are composed of basic resins, tackifiers, viscosity modifiers and antioxidants. The basic resin of hot melt adhesive is the copolymerization of ethylene and vinyl acetate under high temperature and pressure, that is, EVA resin. This resin is the main component of making hot melt adhesives. The proportion and quality of the basic resin determine the basic performance of hot melt adhesives. The higher the crystallinity, the higher the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/08C09J11/04
CPCC09J11/08C09J11/04
Inventor 李华令刘华平
Owner ANHUI SOYA DECORATIVE MATERIALS
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