CN114350288A - Hot melt adhesive for edge sealing of maleic anhydride grafted and modified EVA and preparation method thereof - Google Patents

Hot melt adhesive for edge sealing of maleic anhydride grafted and modified EVA and preparation method thereof Download PDF

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Publication number
CN114350288A
CN114350288A CN202210038940.4A CN202210038940A CN114350288A CN 114350288 A CN114350288 A CN 114350288A CN 202210038940 A CN202210038940 A CN 202210038940A CN 114350288 A CN114350288 A CN 114350288A
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maleic anhydride
hot melt
eva
parts
melt adhesive
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CN202210038940.4A
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罗斌
李智明
黄建恒
李开霞
田林
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Chongqing Xiaoshifu New Material Co ltd
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Chongqing Xiaoshifu New Material Co ltd
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Abstract

The invention discloses a maleic anhydride grafted modified EVA (ethylene-vinyl acetate copolymer) edge sealing hot melt adhesive, which comprises the following components in parts by weight: 10-20 parts of EVA (ethylene-vinyl acetate) particles, 12-30 parts of maleic anhydride monomers, 15-25 parts of tackifying resin, 35-60 parts of calcium carbonate, 0-0.16 part of antioxidant, 2-5 parts of initiator and 2-5 parts of plasticizer; according to the invention, EVA particles and maleic anhydride monomers are subjected to graft copolymerization in the presence of an initiator and a plasticizer, then tackifying resin, calcium carbonate and an antioxidant are added, and the mixture is uniformly stirred under high-temperature melting to prepare the maleic anhydride modified EVA hot melt adhesive; maleic anhydride is selected as a grafting object, and the maleic anhydride has high reaction activity and strong relative polarity and is easy to be linked to a molecular chain, so the maleic anhydride is a more suitable melt grafting monomer, and particularly has higher adhesive force on polar plates; therefore, the hot melt adhesive prepared by the invention has good hot adhesiveness and good bonding strength for plates with strong polarity and lower surface energy.

Description

Hot melt adhesive for edge sealing of maleic anhydride grafted and modified EVA and preparation method thereof
Technical Field
The invention relates to the technical field of hot melt adhesives, and particularly relates to a maleic anhydride grafted modified EVA edge sealing hot melt adhesive and a preparation method thereof.
Background
The solvent-based adhesive is widely applied to woodworkers due to high bonding strength and good flexibility; but the harmful solvent content is high, so that the environment and the human body are greatly damaged, and the use of the harmful solvent is limited by the nation; the hot melt adhesive contains no solvent and is 100 percent of solid, has small influence on the environment, and becomes one of the adhesive types encouraged by the state.
The EVA hot melt adhesive is a polymer which does not need solvent, contains no water and is meltable in 100% solid, is solid at normal temperature, is heated and melted to a certain degree to become a liquid adhesive which can flow and has certain viscosity, and is light brown translucent or natural white after being melted.
The main component of the hot melt adhesive is that basic resin is formed by copolymerizing ethylene and vinyl acetate under high pressure, and then the hot melt adhesive is prepared by matching tackifier, viscosity regulator, antioxidant and the like. The wood door is mainly applied to wood doors, cabinet bodies, paper, air conditioner filter elements and the like. A problem with the widespread use is that the materials to be bonded are also of a wide variety, from ordinary paper, textiles, ceramics, plastics to metals, coated craft paper, and the like.
However, the hot melt adhesive of the traditional EVA system has limited bonding strength to the plate with strong polarity and lower surface energy, when a high-polarity material needs to be bonded, the common EVA hot melt adhesive often cannot reach the required bonding strength, and the polyurethane hot melt adhesive of the higher-polarity system is high in price, which brings inconvenience to people. In order to solve the above problems, a method of modifying EVA to introduce a reactive group having relatively strong activity into a molecular chain is generally used. The maleic anhydride has high reactivity and strong relative polarity, and is easy to be linked to a molecular chain, so the maleic anhydride is a more suitable melt grafting monomer, and particularly has higher adhesive force to polar plates.
Disclosure of Invention
The invention aims to provide a maleic anhydride graft modified EVA hot melt adhesive for edge sealing and a preparation method thereof, and aims to solve the problems that the hot melt adhesive of the traditional EVA system has limited bonding strength to plates with strong polarity and lower surface energy, when high-polarity materials need to be bonded, the common EVA hot melt adhesive cannot meet the required bonding strength, and the polyurethane hot melt adhesive of a higher-polarity system is high in price, so that inconvenience is brought to the use of people.
In order to achieve the purpose, the invention provides the following technical scheme: a maleic anhydride grafted modified EVA hot melt adhesive for edge sealing comprises the following components in parts by weight: 10-20 parts of EVA particles, 12-30 parts of maleic anhydride monomers, 15-25 parts of tackifying resin, 35-60 parts of calcium carbonate, 0-0.16 part of antioxidant, 2-5 parts of initiator and 2-5 parts of plasticizer.
Wherein, the EVA particles adopt one or two of hot melt EVA 28150 and hot melt EVA 28400; the hot melt adhesive EVA 28150 has good adhesive property; the hot melt adhesive EVA 28400 has good fluidity; the tackifying resin is one or two of carbon five-carbon nine copolymerized petroleum resin and rosin pentaerythritol ester; the wetting property, the hot sticking property and the bonding force of the carbon five-carbon nine copolymerized petroleum resin and the rosin pentaerythritol ester are good; the antioxidant adopts tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester; the foaming phenomenon of the EVA hot melt adhesive can be effectively inhibited; the initiator adopts cumene hydroperoxide; and the plasticizer adopts dibutyl phthalate.
A preparation method of a hot melt adhesive for edge sealing of maleic anhydride grafted modified EVA comprises the following steps:
s101, respectively weighing EVA particles, maleic anhydride monomers, tackifying resin, calcium carbonate, an antioxidant, an initiator and a plasticizer according to parts by weight;
s102, putting EVA particles, maleic anhydride monomers, an initiator and a plasticizer into a high-speed mixer, uniformly mixing, and then extruding and granulating at 180 ℃ by using a double-screw extruder to obtain PP-g-MAH particles;
s103, adding PP-g-MAH particles and tackifying resin into a reaction kettle, heating the reaction kettle to 170-200 ℃, and stirring for 1.5-2 hours;
and S104, after uniformly stirring, adding calcium carbonate and an antioxidant, continuously stirring for 1.5-2 hours, and after uniformly stirring, discharging to obtain the edge sealing hot melt adhesive.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, EVA particles and maleic anhydride monomers are subjected to graft copolymerization in the presence of an initiator and a plasticizer, then tackifying resin, calcium carbonate and an antioxidant are added, and the mixture is uniformly stirred under high-temperature melting to prepare the maleic anhydride modified EVA hot melt adhesive; maleic anhydride is selected as a grafting object, and the maleic anhydride has high reaction activity and strong relative polarity and is easy to be linked to a molecular chain, so the maleic anhydride is a more suitable melt grafting monomer, and particularly has higher adhesive force on polar plates; therefore, the hot melt adhesive prepared by the invention has good hot adhesiveness and good bonding strength for plates with strong polarity and lower surface energy.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A maleic anhydride grafted modified EVA hot melt adhesive for edge sealing comprises the following components in parts by weight: 10 parts of EVA particles, 12 parts of maleic anhydride monomers, 15 parts of tackifying resin, 35 parts of calcium carbonate, 0.16 part of antioxidant, 2 parts of initiator and 2 parts of plasticizer.
A preparation method of a hot melt adhesive for edge sealing of maleic anhydride grafted modified EVA comprises the following steps:
s101, respectively weighing EVA particles, maleic anhydride monomers, tackifying resin, calcium carbonate, an antioxidant, an initiator and a plasticizer according to parts by weight;
s102, putting EVA particles, maleic anhydride monomers, an initiator and a plasticizer into a high-speed mixer, uniformly mixing, and then extruding and granulating at 180 ℃ by using a double-screw extruder to obtain PP-g-MAH particles;
s103, adding PP-g-MAH particles and tackifying resin into a reaction kettle, heating the reaction kettle to 180 ℃, and stirring for 1.5 hours;
and S104, after uniformly stirring, adding calcium carbonate and an antioxidant, continuously stirring for 1.5 hours, and after uniformly stirring, discharging to obtain the maleic anhydride graft modified EVA edge sealing hot melt adhesive.
Example 2
A maleic anhydride grafted modified EVA hot melt adhesive for edge sealing comprises the following components in parts by weight: 20 parts of EVA particles, 30 parts of maleic anhydride monomers, 25 parts of tackifying resin, 60 parts of calcium carbonate, 0.16 part of antioxidant, 5 parts of initiator and 5 parts of plasticizer.
A preparation method of a hot melt adhesive for edge sealing of maleic anhydride grafted modified EVA comprises the following steps:
s101, respectively weighing EVA particles, maleic anhydride monomers, tackifying resin, calcium carbonate, an antioxidant, an initiator and a plasticizer according to parts by weight;
s102, putting EVA particles, maleic anhydride monomers, an initiator and a plasticizer into a high-speed mixer, uniformly mixing, and then extruding and granulating at 180 ℃ by using a double-screw extruder to obtain PP-g-MAH particles;
s103, adding PP-g-MAH particles and tackifying resin into a reaction kettle, heating the reaction kettle to 200 ℃, and stirring for 2 hours;
and S104, after uniformly stirring, adding calcium carbonate and an antioxidant, continuously stirring for 2 hours, and after uniformly stirring, discharging to obtain the maleic anhydride graft modified EVA edge sealing hot melt adhesive.
Comparative example 1
The hot melt adhesive for the edge sealing of the common EVA comprises the following components in parts by weight: 10 parts of EVA particles, 15 parts of tackifying resin, 35 parts of calcium carbonate, 0.16 part of antioxidant, 2 parts of initiator and 2 parts of plasticizer.
A preparation method of a hot melt adhesive for edge sealing of common EVA comprises the following steps:
s101, respectively weighing EVA particles, tackifying resin, calcium carbonate, an antioxidant, an initiator and a plasticizer according to parts by weight;
s102, putting EVA particles, an initiator and a plasticizer into a high-speed mixer, uniformly mixing, and then extruding and granulating at 180 ℃ by using a double-screw extruder to obtain particles;
s103, adding the particles and tackifying resin into a reaction kettle, heating the reaction kettle to 180 ℃, and stirring for 1.5 hours;
and S104, after uniformly stirring, adding calcium carbonate and an antioxidant, continuously stirring for 1.5 hours, and after uniformly stirring, discharging to obtain the common EVA edge sealing hot melt adhesive.
Comparative example 2
The hot melt adhesive for the edge sealing of the common EVA comprises the following components in parts by weight: 20 parts of EVA particles, 25 parts of tackifying resin, 60 parts of calcium carbonate, 0.16 part of antioxidant, 5 parts of initiator and 5 parts of plasticizer.
A preparation method of a hot melt adhesive for edge sealing of common EVA comprises the following steps:
s101, respectively weighing EVA particles, tackifying resin, calcium carbonate, an antioxidant, an initiator and a plasticizer according to parts by weight;
s102, putting EVA particles, an initiator and a plasticizer into a high-speed mixer, uniformly mixing, and then extruding and granulating at 180 ℃ by using a double-screw extruder to obtain particles;
s103, adding the particles and tackifying resin into a reaction kettle, heating the reaction kettle to 200 ℃, and stirring for 2 hours;
and S104, after uniformly stirring, adding calcium carbonate and an antioxidant, continuously stirring for 2 hours, and after uniformly stirring, discharging to obtain the common EVA edge sealing hot melt adhesive.
Experimental example 1
The maleic anhydride grafted modified EVA hot melt adhesive for edge sealing prepared in example 1 and the common EVA hot melt adhesive for edge sealing prepared in comparative example 1 are used as test objects; performing on-machine test on the EVA hot melt adhesive on an edge sealing machine, controlling the temperature of the rubber roll to be more than 170 ℃ and the glue amount to be 305g, simultaneously processing the hot melt adhesive for edge sealing of the maleic anhydride grafted modified EVA and the hot melt adhesive for edge sealing of the common EVA, measuring the initial adhesion by using a tension meter after edge sealing, and comparing the 1h adhesion and the final adhesion, which is described in the following table 1;
TABLE 1 tensiometer testing
Figure BDA0003469342740000061
From the data in the table, the off-line strength, the 1h adhesive force and the 24h adhesive force of the hot melt adhesive for edge sealing of the maleic anhydride grafted modified EVA prepared by the invention are superior to those of the common EVA hot melt adhesive, and the 24h adhesive force is more than 10 kg. Can meet the requirement of most furniture customers on the adhesive force.
Experimental example 2
The maleic anhydride grafted modified EVA hot melt adhesive for edge sealing prepared in example 2 and the common EVA hot melt adhesive for edge sealing prepared in comparative example 2 are used as test objects; the EVA hot melt adhesive is put into a viscometer to test the viscosity, the fluidity, the open time and the hot adhesiveness, and the specific test results are shown in the following table 2;
TABLE 2 basic Performance test
Item Modified EVA hot melt adhesive Common EVA hot melt adhesive
Viscosity of the oil 5.6 ten thousand 7.8 ten thousand
Open time(s) 15-20 15-20
Hot tack property Is excellent in In general
Fluidity of the resin Good effect In general
The data in the table show that the hot melt adhesive for edge sealing of the maleic anhydride grafted modified EVA prepared by the invention has the advantages of smaller viscosity, opening time equivalent to that of a common EVA hot melt adhesive, and better fluidity and hot adhesiveness. Can be suitable for wooden door customers.
The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are contemplated herein. To be exhaustive. All obvious changes and modifications which are obvious to the technical scheme of the invention are covered by the protection scope of the invention.

Claims (7)

1. The utility model provides a maleic anhydride grafting modification EVA hot melt adhesive for banding which characterized in that: the hot melt adhesive comprises the following components in parts by weight: 10-20 parts of EVA particles, 12-30 parts of maleic anhydride monomers, 15-25 parts of tackifying resin, 35-60 parts of calcium carbonate, 0-0.16 part of antioxidant, 2-5 parts of initiator and 2-5 parts of plasticizer.
2. The hot melt adhesive for edge sealing of maleic anhydride grafted and modified EVA of claim 1, wherein the EVA particles are one or both of hot melt EVA 28150 and hot melt EVA 28400.
3. The hot melt adhesive for edge sealing of maleic anhydride graft modified EVA of claim 1, wherein the tackifying resin is one or two of a carbon five-carbon nine copolymerized petroleum resin and a rosin pentaerythritol ester.
4. The hot melt adhesive for edge sealing of maleic anhydride graft modified EVA of claim 1, wherein the antioxidant is pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].
5. The hot melt adhesive for edge sealing of maleic anhydride grafted and modified EVA of claim 1, wherein the initiator is cumene hydroperoxide.
6. The hot melt adhesive for edge sealing of maleic anhydride grafted and modified EVA according to claim 1, wherein the plasticizer is dibutyl phthalate.
7. The preparation method of the hot melt adhesive for edge sealing of maleic anhydride grafted and modified EVA is characterized by comprising the following steps:
s101, respectively weighing EVA particles, maleic anhydride monomers, tackifying resin, calcium carbonate, an antioxidant, an initiator and a plasticizer according to parts by weight;
s102, putting EVA particles, maleic anhydride monomers, an initiator and a plasticizer into a high-speed mixer, uniformly mixing, and then extruding and granulating at 180 ℃ by using a double-screw extruder to obtain PP-g-MAH particles;
s103, adding PP-g-MAH particles and tackifying resin into a reaction kettle, heating the reaction kettle to 170-200 ℃, and stirring for 1.5-2 hours;
and S104, after uniformly stirring, adding calcium carbonate and an antioxidant, continuously stirring for 1.5-2 hours, and after uniformly stirring, discharging to obtain the edge sealing hot melt adhesive.
CN202210038940.4A 2022-01-13 2022-01-13 Hot melt adhesive for edge sealing of maleic anhydride grafted and modified EVA and preparation method thereof Pending CN114350288A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050218551A1 (en) * 2004-04-01 2005-10-06 Izhar Halahmi Process for producing polar polyolefines and modified polyolefines thereof
CN101245125A (en) * 2008-03-25 2008-08-20 广州市合诚化学有限公司 High-current ethylene-vinyl acetate copolymer inarch maleic anhydride product, preparation method and application thereof
CN104497924A (en) * 2014-11-25 2015-04-08 四川大学 New antistatic hot melt adhesive and preparation method thereof
CN106543922A (en) * 2016-11-02 2017-03-29 昆山天洋热熔胶有限公司 It is suitable to the preparation method of the modified EVA hot-melt adhesive and its membrane-based article of masking

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050218551A1 (en) * 2004-04-01 2005-10-06 Izhar Halahmi Process for producing polar polyolefines and modified polyolefines thereof
CN101245125A (en) * 2008-03-25 2008-08-20 广州市合诚化学有限公司 High-current ethylene-vinyl acetate copolymer inarch maleic anhydride product, preparation method and application thereof
CN104497924A (en) * 2014-11-25 2015-04-08 四川大学 New antistatic hot melt adhesive and preparation method thereof
CN106543922A (en) * 2016-11-02 2017-03-29 昆山天洋热熔胶有限公司 It is suitable to the preparation method of the modified EVA hot-melt adhesive and its membrane-based article of masking

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN115044302B (en) * 2022-07-18 2023-03-10 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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