CN113969091A - Water-based EVA (ethylene-vinyl acetate) treating agent and preparation method thereof - Google Patents
Water-based EVA (ethylene-vinyl acetate) treating agent and preparation method thereof Download PDFInfo
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- CN113969091A CN113969091A CN202111295951.2A CN202111295951A CN113969091A CN 113969091 A CN113969091 A CN 113969091A CN 202111295951 A CN202111295951 A CN 202111295951A CN 113969091 A CN113969091 A CN 113969091A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/06—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/02—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
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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)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Graft Or Block Polymers (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention relates to the technical field of high polymer materials, and particularly relates to a water-based EVA (ethylene vinyl acetate) treating agent and a preparation method thereof. The material comprises, by mass, 20-40 parts of ethylene-vinyl acetate copolymer, 20-40 parts of polyurethane emulsion, 20-40 parts of ethyl acetate, 5-10 parts of EVA modified monomer, 5-10 parts of vinyl acetate, 5-10 parts of acrylate emulsion, 0.5-1 part of initiator, 0.5-3 parts of dipenta-penta-vulcanizing agent, 5-10 parts of assistant and 200-500 parts of ultrapure water; the invention enhances the polarity of the EVA treating agent, and the prepared aqueous EVA treating agent ensures that the EVA base material and the adhesive have good compatibility, can increase the mechanical strength and the adhesive property of the aqueous EVA treating agent, reduce the use of volatile organic solvents and reduce the environmental pollution.
Description
Technical Field
The invention relates to the technical field of high polymer materials, and particularly relates to a water-based EVA (ethylene vinyl acetate) treating agent and a preparation method thereof.
Background
Ethylene-vinyl acetate copolymer (EVA) foam materials have the advantages of high rebound resilience, light weight, good toughness, low price and the like, are widely used as sole materials, however, EVA materials have low surface polarity and are difficult to be directly bonded with other materials, and EVA treating agents are generally required to be coated to improve the polarity of the EVA surface, so that EVA is bonded with the materials through adhesives.
The traditional treating agent is an organic solvent type, and generally contains a large amount of volatile organic solvents such as acetone, toluene and the like, and the volatile organic solvents can be released into the environment, so that the environment is polluted, resources are wasted, and the health of operators using the traditional organic solvent type treating agent is harmed. However, the development of the aqueous EVA treatment agent is still in the development stage, and the simple preparation of the EVA treatment agent by using solvent water instead of an organic solvent causes the problems of the polarity reduction of the treatment agent, the applicability reduction of the treatment agent to EVA base materials, the mismatch between the treatment agent and an adhesive, the reduction of the adhesive strength and the peel strength of the treatment agent, and the like.
Disclosure of Invention
The invention aims to provide a water-based EVA treating agent and a preparation method thereof, which can enhance the polarity of the EVA treating agent, make the EVA base material and the adhesive have good compatibility, increase the mechanical strength and the adhesive property of the water-based EVA treating agent, reduce the use of volatile organic solvents and reduce the environmental pollution.
In order to achieve the purpose, the invention provides the following technical scheme:
the water-based EVA treating agent comprises the following raw materials in parts by mass:
the preparation method of the water-based EVA treating agent comprises the following steps:
the method comprises the following steps: adding ethylene-vinyl acetate copolymer in parts by mass into a reaction container, adding ethyl acetate in parts by mass, heating in a water bath at 70-100 ℃, stirring at a speed of 80-100 r/min, completely dissolving, sequentially adding EVA modified monomer and initiator in parts by mass, and continuously reacting for 5-8 hours to obtain a modified EVA solution;
step two: adding the vinyl acetate and the acrylate emulsion in parts by mass into the modified EVA solution obtained in the step one, reducing the temperature of water bath heating to 50-60 ℃, stirring at the speed of 80-100 r/min, and reacting for 5-8 h to obtain an EVA emulsion;
step three: and (3) adding the polyurethane emulsion in parts by mass into the EVA emulsion obtained in the step two, sequentially adding the bis-penta vulcanizing agent and the auxiliary agent in parts by mass, raising the temperature of water bath heating to 70-80 ℃, stirring at the speed of 100-200 r/min, reacting for 0.5-1 h, adding the ultrapure water in parts by mass, reacting for 0.5-1 h, and cooling to room temperature to obtain the aqueous EVA treating agent. And mixing the polyurethane emulsion and the EVA emulsion to form a cross-linked structure of the waterborne polyurethane and the EVA.
The polyurethane emulsion is sulfonic anion modified polyisocyanate emulsion, and the structural formula of the polyurethane emulsion is as follows:
the EVA modified monomer is one of methyl methacrylate, maleic anhydride and amidosulfonic acid.
The acrylate emulsion is prepared by uniformly mixing methyl methacrylate, phenyl methacrylate, lauryl methacrylate, acetic acid and sodium dodecyl sulfate, heating in a water bath at the temperature of 60 ℃, slowly dropwise adding deionized water while stirring, stirring for 30min, and homogenizing for 2 h.
The mass part ratio of the methyl acrylate, the phenyl acrylate, the lauryl methacrylate, the acetic acid, the sodium dodecyl sulfate and the deionized water is 2: 2: 2: 5: 0.5-3: 10 to 30.
The initiator is one of benzoyl peroxide, diisopropyl peroxydicarbonate and tert-butyl peroxybenzoate.
The auxiliary agent is an anti-hydrolysis agent and an adhesion promoter, and the mass ratio of the auxiliary agent to the adhesion promoter is 1: 1; wherein the hydrolysis resistant agent is monomeric carbodiimide or polycarbodiimide; wherein the adhesion promoter is a silane coupling agent.
The EVA modified monomer is maleic anhydride, in the first step, EVA is dissolved in ethyl acetate, and maleic anhydride is grafted to an ethylene chain under the action of an initiator, namely:
in the second step, the acrylate and the vinyl acetate in the acrylate emulsion are respectively connected to the modified EVA molecular chain to form an EVA emulsion, namely:
the invention has the beneficial effects that:
1. the polyurethane emulsion is used, so that the waterborne polyurethane is connected with EVA (ethylene-vinyl acetate copolymer), is crosslinked among EVA molecular chains, and forms a waterborne EVA treating agent together with the EVA, has free radicals, is easy to bond with an EVA substrate, is easy to bond with a polyurethane adhesive, and enhances the bonding treatment effect of the treating agent.
2. According to the invention, ethyl acetate is used for dissolving EVA, and then the EVA modified monomer is used for grafting modification of the EVA, so that the EVA modified monomer is grafted on an EVA molecular chain, unsaturated bonds are introduced into the EVA molecular chain, the polarity of the EVA molecular chain is increased, and the prepared treating agent can be used for directly connecting and bonding the EVA with other materials.
3. The vinyl acetate and the acrylic ester emulsion are used, the acetate group and the acrylic ester group are introduced into the EVA main chain, the unsaturation degree of the EVA main chain is further not increased, the polarity is increased, the number and the length of side chains are increased simultaneously, the side chains are easy to be connected with different substances, and the prepared treating agent can be used for increasing the connection bonding strength of the EVA and other materials.
4. The invention uses a bis-dipentamethylenedianiline, DBPH for short, the chemical name is 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, and the molecular weight is 290.44. The bi-di-penta vulcanizing agent has a good crosslinking effect on EVA and polyurethane, so that the EVA and the polyurethane can form a crosslinked polymer, the structural stability of the prepared water-based EVA treating agent is facilitated, and the mechanical strength and the bonding property of the EVA can be increased.
5. The invention prepares the aqueous EVA treating agent, which takes the ethylene-vinyl acetate copolymer as a substrate, carries out graft modification on the ethylene-vinyl acetate copolymer, grafts micromolecule maleic anhydride or sulfonic anhydride or methyl methacrylate into a molecular chain, enhances the polarity of the treating agent, introduces acetate group at one end of the ethylene-vinyl acetate copolymer and introduces acrylate group at the other end, further enhances the surface polarity of the EVA treating agent and the compatibility with other materials, and is crosslinked with aqueous polyurethane emulsion to jointly prepare the aqueous EVA treating agent, thereby reducing the use of volatile organic solvent.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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
The water-based EVA treating agent comprises the following raw materials in parts by mass: 20 parts of ethylene-vinyl acetate copolymer, 20 parts of polyurethane emulsion, 20 parts of ethyl acetate, 5 parts of EVA modified monomer, 5 parts of vinyl acetate, 5 parts of acrylate emulsion, 0.5 part of initiator, 0.5 part of dipenta-vulcanizing agent, 5 parts of assistant and 200 parts of ultrapure water;
the EVA modified monomer is methyl methacrylate;
the initiator is benzoyl peroxide;
the auxiliary agent is an anti-hydrolysis agent and an adhesion promoter, and the mass ratio of the auxiliary agent to the adhesion promoter is 1: 1; wherein the hydrolysis resistant agent is monomeric carbodiimide; wherein the adhesion promoter is a silane coupling agent;
the preparation method of the water-based EVA treating agent comprises the following steps:
the method comprises the following steps: adding ethylene-vinyl acetate copolymer in parts by mass into a reaction container, adding ethyl acetate in parts by mass, heating in a water bath at 70 ℃, stirring at a speed of 80r/min to completely dissolve, sequentially adding EVA modified monomers and an initiator in parts by mass, and continuously reacting for 5 hours to obtain a modified EVA solution;
step two: adding the vinyl acetate and the acrylate emulsion in parts by mass into the modified EVA solution obtained in the step one, cooling the water bath heating temperature to 50 ℃, stirring at the speed of 80r/min, and reacting for 5 hours to obtain an EVA emulsion;
step three: and (3) adding the polyurethane emulsion in parts by mass into the EVA emulsion obtained in the step two, sequentially adding the bis-penta vulcanizing agent and the auxiliary agent in parts by mass, raising the temperature of water bath heating to 70 ℃, stirring at the speed of 100r/min, reacting for 0.5h, adding the ultrapure water in parts by mass, reacting for 0.5h, and cooling to room temperature to obtain the water-based EVA treating agent.
Example 2
The water-based EVA treating agent comprises the following raw materials in parts by mass: 40 parts of ethylene-vinyl acetate copolymer, 40 parts of polyurethane emulsion, 40 parts of ethyl acetate, 10 parts of EVA modified monomer, 10 parts of vinyl acetate, 10 parts of acrylate emulsion, 1 part of initiator, 3 parts of dipenta-penta vulcanizing agent, 10 parts of assistant and 500 parts of ultrapure water;
the EVA modified monomer is maleic anhydride;
the initiator is diisopropyl peroxydicarbonate;
the auxiliary agent is an anti-hydrolysis agent and an adhesion promoter, and the mass ratio of the auxiliary agent to the adhesion promoter is 1: 1; wherein the hydrolysis resistant agent is polycarbodiimide; wherein the adhesion promoter is a silane coupling agent;
the preparation method of the water-based EVA treating agent comprises the following steps:
the method comprises the following steps: adding ethylene-vinyl acetate copolymer in parts by mass into a reaction container, adding ethyl acetate in parts by mass, heating in a water bath at 100 ℃, stirring at a speed of 100r/min to completely dissolve, sequentially adding EVA modified monomers and an initiator in parts by mass, and continuously reacting for 8 hours to obtain a modified EVA solution;
step two: adding the vinyl acetate and the acrylate emulsion in parts by mass into the modified EVA solution obtained in the step one, cooling the water bath heating temperature to 60 ℃, stirring at the speed of 100r/min, and reacting for 8 hours to obtain an EVA emulsion;
step three: and (3) adding the polyurethane emulsion in parts by mass into the EVA emulsion obtained in the step two, sequentially adding the bis-penta vulcanizing agent and the auxiliary agent in parts by mass, raising the temperature of water bath heating to 80 ℃, stirring at the speed of 200r/min, reacting for 1h, adding the ultrapure water in parts by mass, reacting for 1h, and cooling to room temperature to obtain the water-based EVA treating agent.
Example 3
The water-based EVA treating agent comprises the following raw materials in parts by mass: 30 parts of ethylene-vinyl acetate copolymer, 30 parts of polyurethane emulsion, 30 parts of ethyl acetate, 8 parts of EVA modified monomer, 8 parts of vinyl acetate, 8 parts of acrylate emulsion, 0.8 part of initiator, 2 parts of dipenta-penta vulcanizing agent, 7 parts of assistant and 300 parts of ultrapure water;
the EVA modified monomer is sulfamic acid;
the initiator is tert-butyl peroxybenzoate;
the auxiliary agent is an anti-hydrolysis agent and an adhesion promoter, and the mass ratio of the auxiliary agent to the adhesion promoter is 1: 1; wherein the hydrolysis resistant agent is monomeric carbodiimide; wherein the adhesion promoter is a silane coupling agent;
the preparation method of the water-based EVA treating agent comprises the following steps:
the method comprises the following steps: adding ethylene-vinyl acetate copolymer in parts by mass into a reaction container, adding ethyl acetate in parts by mass, heating in a water bath at 80 ℃, stirring at a speed of 90r/min to completely dissolve, sequentially adding EVA modified monomers and an initiator in parts by mass, and continuously reacting for 7 hours to obtain a modified EVA solution;
step two: adding the vinyl acetate and the acrylate emulsion in parts by mass into the modified EVA solution obtained in the step one, cooling the water bath heating temperature to 55 ℃, stirring at the speed of 90r/min, and reacting for 6 hours to obtain an EVA emulsion;
step three: and (3) adding the polyurethane emulsion in parts by mass into the EVA emulsion obtained in the step two, sequentially adding the bis-penta vulcanizing agent and the auxiliary agent in parts by mass, raising the temperature of water bath heating to 75 ℃, stirring at the speed of 150r/min, reacting for 0.7h, adding the ultrapure water in parts by mass, reacting for 0.6h, and cooling to room temperature to obtain the water-based EVA treating agent.
The initial peel strength (1 minute) and the later peel strength (3 days) were measured according to the specifications in GB/T19340-. From the table above, the aqueous EVA treatment agent prepared by the methods of examples 1 to 3 has a good peel strength, and the higher the peel strength is, the better the adhesiveness is.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The water-based EVA treating agent is characterized by comprising the following raw materials in parts by mass:
the preparation method of the water-based EVA treating agent comprises the following steps:
the method comprises the following steps: adding ethylene-vinyl acetate copolymer in parts by mass into a reaction container, adding ethyl acetate in parts by mass, heating in a water bath at 70-100 ℃, stirring at a speed of 80-100 r/min, completely dissolving, sequentially adding EVA modified monomer and initiator in parts by mass, and continuously reacting for 5-8 hours to obtain a modified EVA solution;
step two: adding the vinyl acetate and the acrylate emulsion in parts by mass into the modified EVA solution obtained in the step one, reducing the temperature of water bath heating to 50-60 ℃, stirring at the speed of 80-100 r/min, and reacting for 5-8 h to obtain an EVA emulsion;
step three: and (3) adding the polyurethane emulsion in parts by mass into the EVA emulsion obtained in the step two, sequentially adding the bis-penta vulcanizing agent and the auxiliary agent in parts by mass, raising the temperature of water bath heating to 70-80 ℃, stirring at the speed of 100-200 r/min, reacting for 0.5-1 h, adding the ultrapure water in parts by mass, reacting for 0.5-1 h, and cooling to room temperature to obtain the aqueous EVA treating agent.
2. The aqueous EVA treatment of claim 1, wherein: the polyurethane emulsion is sulfonic anion modified polyisocyanate emulsion, and the structural formula of the polyurethane emulsion is as follows:
3. the aqueous EVA treatment of claim 1, wherein: the EVA modified monomer is one of methyl methacrylate, maleic anhydride and amidosulfonic acid.
4. The aqueous EVA treatment of claim 1, wherein: the acrylate emulsion is prepared by uniformly mixing methyl methacrylate, phenyl methacrylate, lauryl methacrylate, acetic acid and sodium dodecyl sulfate, heating in a water bath at the temperature of 60 ℃, slowly dropwise adding deionized water while stirring, stirring for 30min, and homogenizing for 2 h.
5. The aqueous EVA treatment of claim 4, wherein: the mass part ratio of the methyl acrylate, the phenyl acrylate, the lauryl methacrylate, the acetic acid, the sodium dodecyl sulfate and the deionized water is 2: 2: 2: 5: 0.5-3: 10 to 30.
6. The aqueous EVA treatment of claim 1, wherein: the initiator is one of benzoyl peroxide, diisopropyl peroxydicarbonate and tert-butyl peroxybenzoate.
7. The aqueous EVA treatment of claim 1, wherein: the auxiliary agent is an anti-hydrolysis agent and an adhesion promoter, and the mass ratio of the auxiliary agent to the adhesion promoter is 1: 1; wherein the hydrolysis resistant agent is monomeric carbodiimide or polycarbodiimide; wherein the adhesion promoter is a silane coupling agent.
8. The aqueous EVA treatment according to claim 1 or 3, wherein: the EVA modified monomer is maleic anhydride, in the first step, EVA is dissolved in ethyl acetate, and maleic anhydride is grafted to an ethylene chain under the action of an initiator, namely:
9. the aqueous EVA treating agent of claim 1, wherein: in the second step, the acrylate and the vinyl acetate in the acrylate emulsion are respectively connected to the modified EVA molecular chain to form an EVA emulsion, namely:
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| CN202111295951.2A CN113969091A (en) | 2021-11-03 | 2021-11-03 | Water-based EVA (ethylene-vinyl acetate) treating agent and preparation method thereof |
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| CN202111295951.2A CN113969091A (en) | 2021-11-03 | 2021-11-03 | Water-based EVA (ethylene-vinyl acetate) treating agent and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115595107A (en) * | 2022-10-14 | 2023-01-13 | 广东裕田霸力科技股份有限公司（Cn） | Polishing-free EVA (ethylene vinyl acetate) treating agent and preparation method thereof |
| CN116285505A (en) * | 2022-12-19 | 2023-06-23 | 南宝树脂（佛山）有限公司 | Water-based treating agent suitable for high-elasticity EVA material and preparation method thereof |
-
2021
- 2021-11-03 CN CN202111295951.2A patent/CN113969091A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115595107A (en) * | 2022-10-14 | 2023-01-13 | 广东裕田霸力科技股份有限公司（Cn） | Polishing-free EVA (ethylene vinyl acetate) treating agent and preparation method thereof |
| CN115595107B (en) * | 2022-10-14 | 2023-06-16 | 广东裕田霸力科技股份有限公司 | Polishing-free EVA (ethylene-vinyl acetate copolymer) treating agent and preparation method thereof |
| CN116285505A (en) * | 2022-12-19 | 2023-06-23 | 南宝树脂（佛山）有限公司 | Water-based treating agent suitable for high-elasticity EVA material and preparation method thereof |
| CN116285505B (en) * | 2022-12-19 | 2023-10-20 | 南宝树脂（佛山）有限公司 | Water-based treating agent suitable for high-elasticity EVA material and preparation method thereof |
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Application publication date: 20220125 |