CN110330901A - A kind of EVA hot-melt adhesive that adhesion strength is high - Google Patents
A kind of EVA hot-melt adhesive that adhesion strength is high Download PDFInfo
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- CN110330901A CN110330901A CN201910634147.9A CN201910634147A CN110330901A CN 110330901 A CN110330901 A CN 110330901A CN 201910634147 A CN201910634147 A CN 201910634147A CN 110330901 A CN110330901 A CN 110330901A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a kind of EVA hot-melt adhesive that adhesion strength is high, raw material includes: 100 parts of EVA resin, 8-19 parts of SBS thermoplastic elastomer (TPE), 4-11 parts of hydroxyl-terminated polyurethane resin, 0.2-1.3 parts of polyacrylamide, 0.15-0.8 parts of 2- vinyl -1- benzofuran, hydrogenation C by weight511-15 parts of Petropols, 5-13 parts of polyethylene wax, 1-3 parts of paraffin, 0.12-0.34 parts of antioxidant, 0.01-0.1 parts of benzoyl peroxide, 0.01-0.07 parts of europium acrylate, 13-28 parts of filler.The high EVA hot-melt adhesive of adhesion strength proposed by the present invention, adhesion strength is high, heat-resisting quantity is good, ageing-resistant performance is excellent.
Description
Technical field
The present invention relates to adhesive technology field more particularly to a kind of EVA hot-melt adhesives that adhesion strength is high.
Background technique
Hot melt adhesive be it is a kind of using thermoplastic resin as base-material and add a small amount of plasticizer, tackifier, filler, antioxidant etc.,
The adhesive being bonded using temp change, itself has many excellent properties, such as absolutely solid, solidification when
Between short, easy to operate and suitable serialization industrial production etc., at present in fields such as home decoration, unsewn binding, plastics bondings
In be widely applied.
By the difference of matrix resin, hot melt adhesive can be divided into ethylene-vinyl acetate class, styrene block elastomer class,
Polyolefins, polyamide-based, polyesters etc..Ethylene-vinyl acetate class (EVA) hot melt adhesive have excellent weatherability, it is nontoxic,
Pollution-free, the features such as preparation method is easy, be at present using a more hot melt adhesive, but its that there are adhesion strengths is not high,
The defect that heat resistance is not good enough, seriously limits its scope of application.
Summary of the invention
The invention proposes a kind of EVA hot-melt adhesives that adhesion strength is high, to solve the technical issues of proposing in background technique,
Its adhesion strength of EVA hot-melt adhesive of the present invention is high, heat-resisting quantity is good, ageing-resistant performance is excellent.
A kind of high EVA hot-melt adhesive of adhesion strength proposed by the present invention, raw material include: EVA resin 100 by weight
Part, 8-19 parts of SBS thermoplastic elastomer (TPE), 4-11 parts of hydroxyl-terminated polyurethane resin, 0.2-1.3 parts of polyacrylamide, 2- vinyl-
0.15-0.8 parts of 1- benzofuran, hydrogenation C511-15 parts of Petropols, 5-13 parts of polyethylene wax, 1-3 parts of paraffin, antioxidant
0.12-0.34 parts, 0.01-0.1 parts of benzoyl peroxide, 0.01-0.07 parts of europium acrylate, 13-28 parts of filler.
Preferably, the mass content of VA is 28-40wt% in the EVA resin.
Preferably, the SBS thermoplastic elastomer (TPE) is SBS thermoplastic elastomer (TPE) YH-792.
Preferably, the antioxidant is one of antioxidant 1010, irgasfos 168, antioxidant 264, anti-oxidant DLTP
Or a variety of mixture.
Preferably, the filler is the mixture of nano-titanium dioxide and modified nano calcium carbonate；The modified Nano carbon
Sour calcium is prepared according to following technique: being modified to obtain idol to nanometer calcium carbonate as modifying agent using Silane coupling reagent KH-570
Join agent modified nano calcium carbonate；Coupling agent modified nanometer calcium carbonate is added in DMF, methyl-prop is added after being warming up to 70-80 DEG C
Olefin(e) acid -2- hydroxyl ethyl ester and azodiisobutyronitrile are stirred to react 3-5h under the protection of nitrogen, then ultrasound 50-100min, are added
3- isopropyl-dimethyl benzyl isocyanate TMI, ultrasonic reaction 30-50min are washed, are dried to obtain the modified nano-meter caco 3
Calcium.
Preferably, the weight ratio of the modified nano calcium carbonate and nano-titanium dioxide is 5-12:2-4.
Preferably, coupling agent modified nanometer calcium carbonate, 2-hydroxyethyl methacry-late, azodiisobutyronitrile, 3- isopropyl
Base-dimethyl benzyl isocyanate TMI weight ratio is 2-3:2.5-4:0.7-1:4-6.5.
Preferably, the nanometer calcium carbonate is the mixture of Chain-shaped Nano-grade Calcium Carbonate, needle-like nano calcium carbonate, and chain is received
Rice calcium carbonate, needle-like nano calcium carbonate weight ratio be 3-9:1-2.
It is first modifying agent to nano-calcium carbonate using Silane coupling reagent KH-570 in the preparation process of modified nano calcium carbonate
Calcium is modified, and the surface that coupling agent has been introduced into nanometer calcium carbonate has been obtained coupling agent modified nanometer calcium carbonate, later with
Both coupling agent modified nanometer calcium carbonate and 2-hydroxyethyl methacry-late are raw material, using azodiisobutyronitrile as initiator, make
Reacted, introduce hydroxyl, after 3- isopropyl-dimethyl benzyl isocyanate TMI is added, the hydroxyl of introducing further with
Isocyanates is reacted, thus by Silane coupling reagent KH-570,2-hydroxyethyl methacry-late and 3- isopropyl-diformazan
Base benzyl isocyanate ester TMI has been introduced into the surface of nanometer calcium carbonate, is modified, is obtained to the surface of nanometer calcium carbonate
Modified nano calcium carbonate is added into system, is improved its dispersibility in system, is largely reduced nano-sized carbon
The agglomeration tendency of sour calcium, the double bond that surface is introduced into can react with the raw material in system, while the link that its surface introduces
Structure can be wound with EVA, improve nanometer calcium carbonate and the active force of EVA, increase its contact area with system, into one
Step enhances the mechanical property of hot melt adhesive, while having postponed the degradation of EVA macromolecular, improves the high temperature resistance of hot melt adhesive,
In addition, its surface contain with structure as polyurethanes, in addition system, improve compatible with hydroxyl-terminated polyurethane resin
Property；In preferred embodiment, the Chain-shaped Nano-grade Calcium Carbonate that has been specifically chosen special ratios, needle-like nano calcium carbonate are as nano-calcium carbonate
Calcium can play synergistic effect in addition system, and significantly improve gained hot melt adhesive coheres anti-peel property, assign gained heat
The excellent adhesive property of melten gel.
In the present invention, nanometer calcium carbonate is modified to obtain using Silane coupling reagent KH-570 as modifying agent coupling agent modified
The detailed process of nanometer calcium carbonate can be with are as follows: the mixing that ethyl alcohol and water is added in nanometer calcium carbonate, Silane coupling reagent KH-570 is molten
In liquid, wherein nanometer calcium carbonate, the weight ratio of Silane coupling reagent KH-570 are 10:1.3-2, ultrasonic 20-30min, ultrasonic power
For 200-300W, 2-5h then being stirred at 65-75 DEG C, is centrifugated at normal temperature, the revolving speed of centrifugation is 6000-8000r/
Min is dried in vacuo 3-5h at 70-80 DEG C and obtains the coupling agent modified nanometer calcium carbonate.
The high EVA hot-melt adhesive of adhesion strength of the present invention can be prepared according to following technique: by EVA resin, 2-
Vinyl -1- benzofuran, benzoyl peroxide, europium acrylate, filler are uniformly mixed with antioxidant, are added in kneading machine,
It is kneaded 5-12min at 90-100 DEG C, is then added the remaining raw materials, adjusts the temperature to 85-95 DEG C under stirring conditions, is kneaded
Material A is obtained after 45-55min；Material A is added twin-screw extrude into extrusion, the product of extrusion is obtained through cooling, granulation
The high EVA hot-melt adhesive of the adhesion strength；During the preparation process, antioxidant is preferentially added and is kneaded, avoid antioxidant
Non-uniform phenomenon is mixed, keeps the anti-aging property of gained hot melt adhesive good.
Preferably, the rate of stirring is 20-35rpm.
Adhesion strength of the present invention high EVA hot-melt adhesive in raw material, using EVA resin as major ingredient, and cooperates and is added to
SBS thermoplastic elastomer (TPE) and hydroxyl-terminated polyurethane resin, and the ratio of three is controlled, so that three is played synergistic effect, makes heat
The cohesive strength of melten gel increases, and improves the adhesion strength of gained hot melt adhesive, while improving the high temperature resistance of hot melt adhesive, together
When joined a small amount of polyacrylamide, can with water formed hydrogen bond, while in molecule contain N-H group, acid can be absorbed
Matter, the acid small molecule object that can be effectively eliminated or neutralize EVA itself a small amount of free acetic acid contained and be generated in ageing process
Matter assigns hot melt adhesive excellent vapor water barriers ability and ageing-resistant performance；2- vinyl -1- benzofuran, europium acrylate add
Enter in system, under the action of initiator benzoyl peroxide, can react with EVA, by 2- vinyl -1- benzofuran,
Europium acrylate has been introduced into EVA resin, has adjusted the content of wherein vinyl acetate, is had adjusted the polarity of system, is significantly improved
The adhesive property of hot melt adhesive, while introducing europium element, assign the preferable high temperature resistance of hot melt adhesive and ageing-resistant performance；With
The prior art is compared, and hot melt adhesive of the present invention has excellent adhesion strength, and heat-resisting quantity is good, ageing-resistant performance is excellent.
Specific embodiment
In the following, technical solution of the present invention is described in detail by specific embodiment.
Embodiment 1
A kind of EVA hot-melt adhesive that adhesion strength is high, raw material include: 100 parts of EVA resin, SBS thermoplastic elastomehc by weight
Property 19 parts of body, 4 parts of hydroxyl-terminated polyurethane resin, 0.9 part of polyacrylamide, 0.15 part of 2- vinyl -1- benzofuran, hydrogenation C5
15 parts of Petropols, 5 parts of polyethylene wax, 1.7 parts of paraffin, 0.15 part of antioxidant, 0.01 part of benzoyl peroxide, europium acrylate
0.07 part, 28 parts of filler.
Embodiment 2
A kind of EVA hot-melt adhesive that adhesion strength is high, raw material include: 100 parts of EVA resin, SBS thermoplastic elastomehc by weight
Property YH-7928 parts of body, 7 parts of hydroxyl-terminated polyurethane resin, 1.3 parts of polyacrylamide, 0.4 part of 2- vinyl -1- benzofuran, hydrogen
Change C511 parts of Petropols, 9 parts of polyethylene wax, 3 parts of paraffin, 0.34 part of antioxidant 1010,0.1 part of benzoyl peroxide, propylene
0.01 part of sour europium, 21 parts of filler；
Wherein, the mass content of VA is 40wt% in the EVA resin；
The filler is the mixture of nano-titanium dioxide and modified nano calcium carbonate, and modified nano calcium carbonate and nanometer
The weight ratio of titanium dioxide is 5:4；The modified nano calcium carbonate is prepared according to following technique: with silane coupling agent KH-
570 are modified nanometer calcium carbonate to obtain coupling agent modified nanometer calcium carbonate for modifying agent；By coupling agent modified nano-calcium carbonate
Calcium is added in DMF, 2-hydroxyethyl methacry-late and azodiisobutyronitrile is added after being warming up to 70 DEG C, under the protection of nitrogen
It is stirred to react 5h, then ultrasound 50min, 3- isopropyl-dimethyl benzyl isocyanate TMI is added, ultrasonic reaction 50min is washed
It washs, be dried to obtain the modified nano calcium carbonate；Wherein, coupling agent modified nanometer calcium carbonate, 2-hydroxyethyl methacry-late,
Azodiisobutyronitrile, 3- isopropyl-dimethyl benzyl isocyanate TMI weight ratio are 2:4:0.7:6.5；The nano-calcium carbonate
Calcium is the mixture of Chain-shaped Nano-grade Calcium Carbonate, needle-like nano calcium carbonate, and the weight of Chain-shaped Nano-grade Calcium Carbonate, needle-like nano calcium carbonate
Amount is than being 9:1.
Embodiment 3
A kind of EVA hot-melt adhesive that adhesion strength is high, raw material include: 100 parts of EVA resin, SBS thermoplastic elastomehc by weight
12 parts of property body YH-792,11 parts of hydroxyl-terminated polyurethane resin, 0.2 part of polyacrylamide, 2- vinyl -1- benzofuran 0.8
Part, hydrogenation C511.5 parts of Petropols, 13 parts of polyethylene wax, 1 part of paraffin, 0.2 part of irgasfos 168, anti-oxidant DLTP 0.14
Part, 0.07 part of benzoyl peroxide, 0.02 part of europium acrylate, 13 parts of filler；
Wherein, the mass content of VA is 28wt% in the EVA resin；
The filler is the mixture of nano-titanium dioxide and modified nano calcium carbonate, and modified nano calcium carbonate and nanometer
The weight ratio of titanium dioxide is 12:2；The modified nano calcium carbonate is prepared according to following technique: with silane coupling agent KH-
570 are modified nanometer calcium carbonate to obtain coupling agent modified nanometer calcium carbonate for modifying agent；By coupling agent modified nano-calcium carbonate
Calcium is added in DMF, 2-hydroxyethyl methacry-late and azodiisobutyronitrile is added after being warming up to 80 DEG C, under the protection of nitrogen
It is stirred to react 3h, then ultrasound 100min, 3- isopropyl-dimethyl benzyl isocyanate TMI is added, ultrasonic reaction 30min is washed
It washs, be dried to obtain the modified nano calcium carbonate；Wherein, coupling agent modified nanometer calcium carbonate, 2-hydroxyethyl methacry-late,
Azodiisobutyronitrile, 3- isopropyl-dimethyl benzyl isocyanate TMI weight ratio are 3:2.5:1:4；The nanometer calcium carbonate
For Chain-shaped Nano-grade Calcium Carbonate, the mixture of needle-like nano calcium carbonate, and Chain-shaped Nano-grade Calcium Carbonate, the weight of needle-like nano calcium carbonate
Than for 3:2.
Embodiment 4
A kind of EVA hot-melt adhesive that adhesion strength is high, raw material include: 100 parts of EVA resin, SBS thermoplastic elastomehc by weight
Property 12 parts of body, 8.7 parts of hydroxyl-terminated polyurethane resin, 1 part of polyacrylamide, 0.65 part of 2- vinyl -1- benzofuran, hydrogenation C5
12 parts of Petropols, 10 parts of polyethylene wax, 2.1 parts of paraffin, 0.1 part of antioxidant 1010,0.05 part of irgasfos 168, antioxidant
264 0.05 parts, 0.05 part of anti-oxidant DLTP, 0.06 part of benzoyl peroxide, 0.04 part of europium acrylate, 21 parts of filler；
Wherein, the mass content of VA is 32wt% in the EVA resin；
The SBS thermoplastic elastomer (TPE) is SBS thermoplastic elastomer (TPE) YH-792；
The filler is the mixture of nano-titanium dioxide and modified nano calcium carbonate, and modified nano calcium carbonate and nanometer
The weight ratio of titanium dioxide is 7:2；The modified nano calcium carbonate is prepared according to following technique: with silane coupling agent KH-
570 are modified nanometer calcium carbonate to obtain coupling agent modified nanometer calcium carbonate for modifying agent；By coupling agent modified nano-calcium carbonate
Calcium is added in DMF, 2-hydroxyethyl methacry-late and azodiisobutyronitrile is added after being warming up to 78 DEG C, under the protection of nitrogen
It is stirred to react 3.8h, then ultrasound 85min, 3- isopropyl-dimethyl benzyl isocyanate TMI, ultrasonic reaction 40min is added,
It washs, be dried to obtain the modified nano calcium carbonate；Wherein, coupling agent modified nanometer calcium carbonate, methacrylic acid -2- hydroxyl second
Ester, azodiisobutyronitrile, 3- isopropyl-dimethyl benzyl isocyanate TMI weight ratio are 2.7:3:0.8:5；The nanometer
Calcium carbonate is the mixture of Chain-shaped Nano-grade Calcium Carbonate, needle-like nano calcium carbonate, and Chain-shaped Nano-grade Calcium Carbonate, needle-like nano calcium carbonate
Weight ratio be 5:1.4.
Comparative example 1
With being uniquely different only in that for embodiment 4: without containing polyacrylamide in its raw material.
Comparative example 2
With being uniquely different only in that for embodiment 4: without containing 2- vinyl -1- benzofuran and acrylic acid in its raw material
Europium.
Comparative example 3
With being uniquely different only in that for embodiment 4: the modified nano calcium carbonate is prepared according to following technique: with silicon
Alkane coupling agent kh-570 is that modifying agent is modified nanometer calcium carbonate to obtain coupling agent modified nanometer calcium carbonate, i.e., the described modification
Nanometer calcium carbonate.
Hot melt adhesive in embodiment 4 and comparative example 1-3 is pressed into 160 DEG C of hot press to the glue of 1mm thickness respectively
Piece is cut into 25 × 150mm, and the film cut is placed between two pieces of aluminium flakes (25 × 200mm), in 160 DEG C of hot press
The part 50mm of two blocks of non-viscose glues of aluminium flake is all converted into right angle after cooling, with viscose glue by upper hot pressing 2min, pressure 4MPa
The part 150mm constitutes a T-type, places obtain test film for 24 hours under test conditions；According to GB/T 2791-1995 standard into
The measurement of row peel strength；Ring and ball softening point measurement is carried out according to GB/T 15332-1994 standard；
The measurement of adhesion strength: according to ASTMD1002 using universal testing machine measurement embodiment 4 and comparative example 1-3 heat
The adhesive strength of melten gel.At room temperature, substrate sizes are 150mm × 30mm × 2mm, and gluing length is about 3cm.
As a result as shown in the table:
The hot melt adhesive of embodiment 4 and comparative example 4, aging 30 days at 80 DEG C, adhesive property is basically unchanged, and is compared
The hot melt adhesive of example 2 and comparative example 3,30 days its adhesive properties of aging are declined at 70 DEG C.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of EVA hot-melt adhesive that adhesion strength is high, which is characterized in that its raw material include: by weight 100 parts of EVA resin,
8-19 parts of SBS thermoplastic elastomer (TPE), 4-11 parts of hydroxyl-terminated polyurethane resin, 0.2-1.3 parts of polyacrylamide, 2- vinyl -1-
0.15-0.8 parts of benzofuran, hydrogenation C511-15 parts of Petropols, 5-13 parts of polyethylene wax, 1-3 parts of paraffin, antioxidant 0.12-
0.34 part, 0.01-0.1 parts of benzoyl peroxide, 0.01-0.07 parts of europium acrylate, 13-28 parts of filler.
2. the high EVA hot-melt adhesive of adhesion strength according to claim 1, which is characterized in that the quality of VA in the EVA resin
Content is 28-40wt%.
3. the high EVA hot-melt adhesive of adhesion strength according to claim 1 or claim 2, which is characterized in that the SBS thermoplastic elastic
Body is SBS thermoplastic elastomer (TPE) YH-792.
4. the high EVA hot-melt adhesive of adhesion strength according to claim 1 or claim 2, which is characterized in that the antioxidant is antioxidant
1010, the mixture of one or more of irgasfos 168, antioxidant 264, anti-oxidant DLTP.
5. the high EVA hot-melt adhesive of adhesion strength according to claim 1 or claim 2, which is characterized in that the filler is nano-silica
Change the mixture of titanium and modified nano calcium carbonate；The modified nano calcium carbonate is prepared according to following technique: with silane idol
Connection agent KH-570 is that modifying agent is modified nanometer calcium carbonate to obtain coupling agent modified nanometer calcium carbonate；It is received coupling agent modified
Rice calcium carbonate is added in DMF, 2-hydroxyethyl methacry-late and azodiisobutyronitrile is added after being warming up to 70-80 DEG C, in nitrogen
Protection under be stirred to react 3-5h, 3- isopropyl-dimethyl benzyl isocyanate TMI is added in then ultrasound 50-100min, surpasses
Phonoresponse 30-50min is washed, is dried to obtain the modified nano calcium carbonate.
6. the high EVA hot-melt adhesive of adhesion strength according to claim 5, which is characterized in that the modified nano calcium carbonate with
The weight ratio of nano-titanium dioxide is 5-12:2-4.
7. according to the high EVA hot-melt adhesive of the adhesion strength of claim 5 or 6, which is characterized in that coupling agent modified nano-calcium carbonate
Calcium, 2-hydroxyethyl methacry-late, azodiisobutyronitrile, 3- isopropyl-dimethyl benzyl isocyanate TMI weight ratio are
2-3:2.5-4:0.7-1:4-6.5.
8. according to the high EVA hot-melt adhesive of the adhesion strength of claim 5 or 6, which is characterized in that the nanometer calcium carbonate is chain
The mixture of shape nanometer calcium carbonate, needle-like nano calcium carbonate, and Chain-shaped Nano-grade Calcium Carbonate, the weight ratio of needle-like nano calcium carbonate are
3-9:1-2.
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| CN113403003A (en) * | 2021-06-23 | 2021-09-17 | 泉州中宝鞋材有限公司 | Formula and preparation method of high-hardness hot-melt adhesive sheet |
| CN113913131A (en) * | 2021-11-05 | 2022-01-11 | 龚郁蓉 | Modified EVA hot melt adhesive and preparation method thereof |
| CN114262582A (en) * | 2022-01-21 | 2022-04-01 | 广东汇齐新材料有限公司 | High-temperature-resistant EVA hot-melt adhesive film and preparation process thereof |
| CN115044348A (en) * | 2022-07-13 | 2022-09-13 | 广州市嘉雁粘合剂有限公司 | EMS label hot melt adhesive with strong peeling force and easy slitting and preparation method thereof |
| CN115044302A (en) * | 2022-07-18 | 2022-09-13 | 惠州艺都文化用品有限公司 | Modified EVA hot melt adhesive and precious metal commemorative coin are with hot tectorial membrane |
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