CN114057944B - Reactive epoxy grafted polyolefin resin and preparation method thereof - Google Patents

Reactive epoxy grafted polyolefin resin and preparation method thereof Download PDF

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CN114057944B
CN114057944B CN202111303367.7A CN202111303367A CN114057944B CN 114057944 B CN114057944 B CN 114057944B CN 202111303367 A CN202111303367 A CN 202111303367A CN 114057944 B CN114057944 B CN 114057944B
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polyolefin resin
tert
resin
epoxy
grafted polyolefin
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CN114057944A (en
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辛灵敏
魏晓勇
周志英
张德华
孔庆茹
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Zhejiang Xiangbang Technology Co ltd
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Zhejiang Xiangbang Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
    • C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
    • C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
    • C08F255/026—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms on to ethylene-vinylester copolymers
    • 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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C09J123/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09J123/0853—Vinylacetate
    • 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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09J123/0869—Acids or derivatives thereof
    • 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
    • C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • C09J151/06—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The invention discloses a reactive epoxy grafted polyolefin resin and a preparation method thereof. Mixing the compound with epoxy group with polyolefin matrix resin, adding initiator, extruding through screw to graft the epoxy compound with the matrix resin, and blending the grafted polyolefin resin with special initiator again to extrude and granulate to form the final reactive resin. The polyolefin resin prepared by the invention maintains the characteristics of the resin, has high reactivity brought by the epoxy groups, can directly react with the surface of the polar material, enhances the adhesive force and strength of the resin, can be used as a base resin for improving the adhesive force with a base material of a photovoltaic adhesive film, can also be used as a modified resin for compounding with other resins, and greatly expands the application field of the polyolefin resin due to the reactivity of the epoxy groups under different conditions.

Description

Reactive epoxy grafted polyolefin resin and preparation method thereof
Technical Field
The invention relates to an epoxy grafted polyolefin resin, in particular to a reactive epoxy grafted polyolefin resin and a preparation method thereof.
Background
In the technological development of the past decades, energy consumption structures mainly comprising fossil energy provide continuous power for industrial progress, but bring about a series of serious problems such as environmental pollution, and the like, so that the great development of clean energy is a consensus. Photovoltaic is used as a representative of new energy, the accumulated installation scale is continuously increasing, and meanwhile, the assembly and battery technology is continuously innovated.
At present, double-sided PERC batteries are mainstream, but as the photoelectric conversion efficiency of the batteries tends to be ceiling, the technical lifting space is smaller and smaller, and large enterprises are beginning to develop new battery technologies. In the new technology, the most possible commercialization is HIT and TOPCon, and compared with TOPCon, HIT not only has excellent conversion efficiency, but also has relatively simple production process, clear cost reduction route, and further conversion efficiency improvement by adding perovskite and other technologies, thus being the most potential next-generation battery technology. However, the HIT battery piece is more difficult to be adhered compared with a conventional PERC battery due to the low-temperature silver paste and the TCO film on the surface, so that higher requirements are also put on the adhesive property of the packaging adhesive film. The photovoltaic packaging adhesive film is used as an important auxiliary material in the photovoltaic module, long-term stable bonding is one of important factors for guaranteeing the service life of the photovoltaic module, the traditional packaging adhesive film is generally improved in performance through an adhesion promoter in a formula, but the adhesion promoter is easy to lose efficacy in product storage and transportation, has selectivity to an adhesion surface and is not matched with an HIT battery, so that the development of the packaging adhesive film with high bonding performance, which is matched with the HIT battery, is a necessary guarantee of the standard mass production of the HIT module in the future, and is also an important direction of the development of the adhesive film technology at present.
Disclosure of Invention
The invention mainly solves the defects existing in the prior art, and provides a reactive epoxy grafted polyolefin resin which is prepared by introducing epoxy groups into a molecular chain through grafting, then mixing with a special initiator and extruding to form a final product.
The technical problems of the invention are mainly solved by the following technical proposal:
the reactive epoxy grafted polyolefin resin comprises the following components in parts by weight:
the first step of raw material: 50-95 parts of polyolefin resin, 5-50 parts of epoxy compound and 0.5-30% of initiator, and preparing the first raw material to form epoxy grafted polyolefin resin;
step two, raw materials: 20-100 parts of epoxy grafted polyolefin resin formed by the raw materials in the first step, 0-80 parts of polyolefin resin and 0.1-6% of special initiator are prepared into a reactive epoxy grafted polyolefin tree by the raw materials in the second step.
The initiator and the special initiator are expressed in percentage: the initiator and the special initiator are based on 100 parts of the total amount of the resin and the compound, then the initiator and the special initiator are added according to the proportion, the catalyst is generally added in such a way, if the total amount is changed to be the mass part, the parts of the resin and the compound are changed, and the situation that the decimal point and the like are not completely removed exists.
Preferably, the polyolefin resin in the first raw material is any one or a mixture of at least two of ethylene-vinyl acetate copolymer, ethylene-alpha-olefin copolymer, ethylene propylene copolymer, ethylene hexene copolymer, ethylene acrylic acid copolymer, ethylene methacrylate copolymer, ethylene methyl methacrylate copolymer, ethylene ethyl acrylate copolymer, ethylene butyl acrylate copolymer.
Preferably, the special initiator in the second step raw material is a cationic thermal initiator, the property is Lewis acid salt, and the melting point is not higher than 140 ℃.
Preferably, the special initiator is one of sulfonium salt cationic initiator, hexafluoroantimonate cationic initiator, boron trifluoride-amine complex and dicyandiamide.
Preferably, the epoxy compound in the first step raw material is any one or a mixture of at least two of 1-allyloxy-2, 3-epoxypropane, glycidyl methacrylate, 1, 2-epoxy-4-vinylcyclohexane, 3, 4-epoxycyclohexylmethyl methacrylate and 3, 4-epoxycyclohexylmethyl acrylate.
Preferably, the initiator used in the first step is t-butyl peroxy-2-ethylhexyl carbonate, t-amyl peroxy (2-ethylhexyl) carbonate, t-butylperoxyisopropyl formate, 1' -bis (t-amyl peroxy) cyclohexane, 1-bis (t-butylperoxy) cyclohexane, 1' -bis (t-butylperoxy) -3, 5-trimethylcyclohexane, 2, 5-dimethyl-2, 5-bis (t-butylperoxy) hexane, t-butyl peroxy 3, 5-trimethylhexanoate, dicumyl peroxide, dibenzoyl peroxide, bis (4-methylbenzoyl) peroxide, n-butyl-4, 4-bis (t-butylperoxy) valerate, alpha, any one or a mixture of at least two of alpha ' -bis (tert-butyl peroxy) -1, 3-diisopropylbenzene and tert-amyl peroxybenzoate.
The preparation method of the reactive epoxy grafted polyolefin resin is implemented in two steps according to the following preparation method:
the first step: adding the raw materials in the first step into a stirring kettle according to parts by weight, uniformly stirring, putting the mixed materials into a double-screw extrusion granulator, heating and melting and extruding at 70-180 ℃, and cutting off to form granules, wherein the granules are the epoxy grafted polyolefin resin, and the rotating speed of a screw in the double-screw extrusion granulator is 100-600r/min;
and a second step of: and (3) adding one or two raw materials of the epoxy grafted polyolefin granules formed in the first step and the raw materials of the second step into a stirring kettle, uniformly mixing, adding into a double-screw extrusion granulator, heating and melting and extruding at 70-120 ℃, and cutting into granules to form the final reactive epoxy grafted polyolefin resin, wherein the rotating speed of a screw in the double-screw extrusion granulator is 100-600r/min.
Compared with the prior art, the invention has the beneficial effects that:
the adhesive property of the adhesive film is improved from the aspect of formulation by introducing substances such as tackifying resin and adhesion promoters in the prior art, and the adhesive property of the adhesive film is improved from the aspect of formulation. The reactive epoxy grafted polyolefin resin provided by the invention not only can be used as a base resin for improving the adhesive force with a base material of a photovoltaic adhesive film, but also can be used as a modified resin for compounding with other resins, and the reaction characteristics of the modified resin under different conditions of epoxy groups greatly expand the application field of the polyolefin resin.
Detailed Description
The technical scheme of the invention is further specifically described by the following examples.
Example 1: the reactive epoxy grafted polyolefin resin comprises, by weight, 100 parts of epoxy grafted polyolefin resin and 0.8% of sulfonium salt cationic initiator; wherein the epoxy grafted ethylene-alpha-olefin copolymer comprises the following components in parts by weight: 94 parts of ethylene-alpha-olefin copolymer, 6 parts of 1, 2-epoxy-4-vinylcyclohexane, 2% tert-butyl peroxy-2-ethylhexyl carbonate;
the preparation method comprises the following steps: the first step: adding raw materials of the epoxy grafted ethylene-alpha-olefin copolymer into a stirring kettle in proportion, uniformly stirring, putting the mixed materials into a double-screw extrusion granulator, heating and melting at 120 ℃ for extrusion, and cutting off to form granules, wherein the granules are resin after epoxy grafting, and the rotating speed of a screw in the double-screw extrusion granulator is 300r/min; and a second step of: and (3) putting the epoxy grafted resin granules formed in the first step and the sulfonium salt cationic initiator into a stirring kettle, uniformly mixing, putting into a double-screw extrusion granulator, heating, melting and extruding at 90 ℃, and cutting into granules to form the final reactive epoxy grafted polyolefin resin, wherein the rotating speed of a screw in the double-screw extrusion granulator is 200r/min.
Example 2:
the reactive epoxy grafted polyolefin resin comprises, by weight, 40 parts of an epoxy grafted ethylene-vinyl acetate copolymer, 60 parts of an ethylene-vinyl acetate copolymer and 2% of a hexafluoroantimonate cationic initiator; wherein the epoxy grafted ethylene-vinyl acetate copolymer comprises the following components in parts by weight: 70 parts of ethylene-vinyl acetate copolymer, 30 parts of glycidyl methacrylate and 17% of tert-butyl 3, 5-trimethylhexanoate peroxide;
the preparation method comprises the following steps: the first step: adding raw materials of the epoxy grafted ethylene-vinyl acetate copolymer into a stirring kettle in proportion, uniformly stirring, putting the mixed materials into a double-screw extrusion granulator, heating and melting at 140 ℃ for extrusion, and cutting off to form granules, wherein the granules are resin after epoxy grafting, and the rotating speed of a screw in the double-screw extrusion granulator is 200r/min; and a second step of: and (3) putting the epoxy grafted resin granules formed in the first step, the ethylene-vinyl acetate copolymer and the hexafluoroantimonate cationic initiator into a stirring kettle, uniformly mixing, putting into a double-screw extrusion granulator, heating and melting and extruding at 100 ℃, and cutting into granules to form the final reactive epoxy grafted polyolefin resin, wherein the rotating speed of a screw in the double-screw extrusion granulator is 200r/min.
Example 3: the reactive epoxy grafted polyolefin resin comprises, by weight, 50 parts of an epoxy grafted ethylene ethyl acrylate copolymer, 50 parts of an ethylene ethyl acrylate copolymer and 1% of a boron trifluoride-amine complex; the epoxy grafted ethylene ethyl acrylate copolymer comprises the following components in parts by weight: 90 parts of ethylene ethyl acrylate copolymer, 10 parts of 1, 2-epoxy-4-vinylcyclohexane and 8% of tert-butyl peroxyisopropyl formate;
the preparation method comprises the following steps: the first step: adding raw materials of the epoxy grafted ethylene ethyl acrylate copolymer into a stirring kettle in proportion, uniformly stirring, putting the mixed materials into a double-screw extrusion granulator, heating and melting at 145 ℃ for extrusion, and cutting off to form granules, wherein the granules are epoxy grafted resin, and the rotating speed of a screw in the double-screw extrusion granulator is 300r/min; and a second step of: and (3) putting the epoxy grafted resin granules formed in the first step, the ethylene ethyl acrylate copolymer and the boron trifluoride-amine complex into a stirring kettle, uniformly mixing, putting into a double-screw extrusion granulator, heating and melting and extruding at 110 ℃, and cutting into granules to form the final reactive epoxy grafted polyolefin resin, wherein the rotating speed of a screw in the double-screw extrusion granulator is 300r/min.
Example 4: the reactive epoxy grafted polyolefin resin consists of epoxy grafted ethylene-alpha-olefin copolymer 40 weight portions, ethylene-hexene copolymer 60 weight portions and boron trifluoride-amine complex 1%; wherein the epoxy grafted ethylene-alpha-olefin copolymer comprises the following components in parts by weight: 85 parts of ethylene-alpha-olefin copolymer, 15 parts of 3, 4-epoxycyclohexylmethyl methacrylate, 9% of tert-amyl (2-ethylhexyl) carbonate;
the preparation method comprises the following steps: the first step: adding raw materials of the epoxy grafted ethylene-alpha-olefin copolymer into a stirring kettle in proportion, uniformly stirring, putting the mixed materials into a double-screw extrusion granulator, heating and melting at 140 ℃ for extrusion, and cutting off to form granules, wherein the granules are resin after epoxy grafting, and the rotating speed of a screw in the double-screw extrusion granulator is 350r/min; and a second step of: and (3) putting the epoxy grafted resin granules formed in the first step, the ethylene-hexene copolymer and the boron trifluoride-amine complex into a stirring kettle, uniformly mixing, putting into a double-screw extrusion granulator, heating and melting and extruding at 100 ℃, and cutting into granules to form the final reactive epoxy grafted polyolefin resin, wherein the rotating speed of a screw in the double-screw extrusion granulator is 400r/min.
Example 5: the reactive epoxy grafted polyolefin resin comprises, by weight, 20 parts of an epoxy grafted ethylene butyl acrylate copolymer, 80 parts of an ethylene propylene copolymer and 1% dicyandiamide; wherein the epoxy grafted ethylene butyl acrylate copolymer comprises the following components in parts by weight: 65 parts of ethylene butyl acrylate copolymer, 35 parts of glycidyl acrylate and 18% of tert-butyl peroxy-2-ethylhexyl carbonate;
the preparation method comprises the following steps: the first step: adding raw materials of the epoxy grafted ethylene butyl acrylate copolymer into a stirring kettle in proportion, uniformly stirring, putting the mixed materials into a double-screw extrusion granulator, heating and melting at 120 ℃ for extrusion, and cutting off to form granules, wherein the granules are epoxy grafted resin, and the rotating speed of a screw in the double-screw extrusion granulator is 400r/min; and a second step of: and (3) putting the epoxy grafted resin granules formed in the first step, the ethylene propylene copolymer and the dicyandiamide into a stirring kettle, uniformly mixing, putting into a double-screw extrusion granulator, heating and melting and extruding at 120 ℃, and cutting into granules to form the final reactive epoxy grafted polyolefin resin, wherein the rotating speed of a screw in the double-screw extrusion granulator is 400r/min.
10g of the final products of examples 1-5 were weighed and evenly placed on a 10cm x 10cm clean aluminum plate, covered with a release film, hot pressed at 150 ℃ for 20min, taken out, and fully cooled for standby.
Comparative example 1:
the ethylene- α -olefin copolymer particles used in example 1 were uniformly placed 10g on a 10cm x 10cm cleaned aluminum plate, coated with a release film, hot pressed at 150C for 20min, and then removed, and completely cooled for use.
Comparative example 2:
the ethylene-vinyl acetate copolymer particles used in example 2 were 10g, and the sample preparation process was the same as that of comparative example 1, and will not be described here.
Comparative example 3:
10g of the ethylene ethyl acrylate copolymer particles used in example 3 were sampled and the same procedure as in comparative example 1 was followed.
Comparative example 4:
the ethylene- α -olefin copolymer and ethylene-hexene copolymer particles used in example 4 were prepared by the same procedure as in comparative example 1 except that 10g of the ethylene- α -olefin copolymer and ethylene-hexene copolymer particles were used in a ratio of 4/6.
Comparative example 5:
10g of the ethylene-butyl acrylate copolymer and the ethylene-propylene copolymer particles used in example 5 were prepared in a ratio of 2/8, and the procedure was the same as in comparative example 1.
Test method and results
The test pieces obtained in examples 1 to 5 and comparative examples 1 to 5 after hot pressing were tested for adhesion to aluminum plates according to the test method of ASTM D903. Specifically, the film on the aluminum plate was cut into a specimen of 10 mm.+ -. 0.5mm, and the peeling force between the film and the aluminum plate was measured on a tensile tester at a tensile speed of 100 mm.+ -. 10mm/min, and the arithmetic average of the three tests was taken to be accurate to 0.1N/cm.
The test results are shown in the following table:
note that: * The ageing experiments were carried out in an environmental box, ageing conditions: 85 ℃, and the relative humidity is 85 percent and 2000 hours.
In order to simulate the adhesion of the surface of the battery piece, a metal aluminum plate is selected as a base material to test adhesion, and the data in the table show that after epoxy grafting, the adhesion of the resin to the metal is obviously improved due to the good reactivity of the epoxy group to the metal, and after aging, the resin still has enough adhesion compared with the similar resin without modification, so that the reactive adhesion formed by the epoxy group is not easily affected by moisture. In general, the bonding performance of the epoxy grafted resin is greatly improved, and the grafted resin can be used as a basic raw material of a glue film and also can be used as a compound resin to participate in various application scenes needing high-strength bonding.
Finally, the above embodiments are intended to illustrate the invention and not to limit the technical solutions described in the invention, and those skilled in the art may make modifications or equivalents based on the patent of the invention, but all technical solutions and modifications that do not depart from the spirit and scope of the invention are intended to be covered by the scope of the claims of the invention.

Claims (4)

1. The utility model provides a photovoltaic packaging glued membrane which characterized in that: hot-press molding the reactive epoxy grafted polyolefin resin on the battery piece:
the reactive epoxy grafted polyolefin resin comprises the following components in parts by weight:
the first step of raw material: 50-95 parts of polyolefin resin, 5-50 parts of epoxy compound and 0.5-30% of initiator, and preparing the first raw material to form epoxy grafted polyolefin resin;
step two, raw materials: 20-100 parts of epoxy grafted polyolefin resin formed by the raw materials in the first step, 0-80 parts of polyolefin resin and 0.1-6% of special initiator are prepared into reactive epoxy grafted polyolefin resin by the raw materials in the second step;
the special initiator is one of a sulfonium salt cationic initiator, a hexafluoroantimonate cationic initiator, a boron trifluoride-amine complex and dicyandiamide;
the preparation of the reactive epoxy grafted polyolefin resin is carried out in two steps according to the following preparation method:
the first step: adding the raw materials in the first step into a stirring kettle according to parts by weight, uniformly stirring, putting the mixed materials into a double-screw extrusion granulator, heating and melting at 70-180 ℃ for extrusion, and cutting off to form granules, wherein the granules are the epoxy grafted polyolefin resin, and the rotating speed of a screw in the double-screw extrusion granulator is 100-600r/min;
and a second step of: and (3) adding one or two raw materials of the epoxy grafted polyolefin granules formed in the first step and the raw materials of the second step into a stirring kettle, uniformly mixing, adding into a double-screw extrusion granulator, heating and melting and extruding at 70-120 ℃, and cutting into granules to form the final reactive epoxy grafted polyolefin resin, wherein the rotating speed of a screw in the double-screw extrusion granulator is 100-600r/min.
2. The photovoltaic packaging film according to claim 1, wherein: the polyolefin resin in the first step of raw material is any one or a mixture of at least two of ethylene-vinyl acetate copolymer, ethylene propylene copolymer, ethylene acrylic acid copolymer, ethylene methyl acrylate copolymer, ethylene ethyl acrylate copolymer and ethylene butyl acrylate copolymer.
3. The photovoltaic packaging film according to claim 1, wherein: the epoxy compound in the first step is any one or a mixture of at least two of 1-allyloxy-2, 3-epoxypropane, glycidyl methacrylate, 1, 2-epoxy-4-vinylcyclohexane, 3, 4-epoxycyclohexylmethyl methacrylate and 3, 4-epoxycyclohexylmethyl acrylate.
4. The photovoltaic packaging film according to claim 1, wherein: the initiator in the first step is tert-butyl peroxy-2-ethylhexyl carbonate, tert-amyl peroxy (2-ethylhexyl) carbonate, tert-butyl peroxyisopropyl formate, 1' -bis (tert-amyl peroxy) cyclohexane, 1-bis (tert-butyl peroxy) cyclohexane, 1' -bis (tert-butyl peroxy) -3, 5-trimethyl cyclohexane, 2, 5-dimethyl-2, any one or a mixture of at least two of 5-bis (tert-butylperoxy) hexane, tert-butyl peroxy 3, 5-trimethylhexanoate, dicumyl peroxide, dibenzoyl peroxide, di (4-methylbenzoyl) peroxide, n-butyl-4, 4-di (tert-butylperoxy) valerate, alpha ' -bis (tert-butylperoxy) -1, 3-diisopropylbenzene and tert-amyl peroxybenzoate.
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