CN111808557B - Label adhesive for plastic bottles and preparation method thereof - Google Patents
Label adhesive for plastic bottles and preparation method thereof Download PDFInfo
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- CN111808557B CN111808557B CN202010733619.9A CN202010733619A CN111808557B CN 111808557 B CN111808557 B CN 111808557B CN 202010733619 A CN202010733619 A CN 202010733619A CN 111808557 B CN111808557 B CN 111808557B
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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
- C09J143/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Adhesives based on derivatives of such polymers
- C09J143/04—Homopolymers or copolymers of monomers containing silicon
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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
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
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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
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
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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
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a label adhesive for plastic bottles and a preparation method thereof, belonging to the technical field of adhesives and being prepared from the following raw materials in parts by weight: 0.5-1.5 parts of vinyl acetate, 10-14 parts of butyl acrylate, 2-4 parts of 2-ethylhexyl acrylate, 3-5 parts of methacrylic acid, 2-4 parts of vinyl dimethoxysilane, 0.4-0.8 part of emulsifier, 0.05-0.5 part of initiator, 0.1-0.5 part of chain transfer agent and 0.3-0.5 part of defoaming agent. The invention adopts a seed emulsion polymerization method, takes vinyl acetate, butyl acrylate, acrylic acid-2-ethylhexyl ester, methacrylic acid and vinyl dimethoxysilane as reaction monomers, takes a water-soluble low-molecular organic urea compound as a chain transfer agent, and synthesizes the novel label adhesive for the plastic bottle under the action of an emulsifier and an initiator. The label adhesive for the plastic bottle can meet the requirements of a high-speed automatic labeling production line.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to a label adhesive for plastic bottles and a preparation method thereof.
Background
The packaging label for glass bottle products such as beer, white spirit, fruit wine and some non-alcoholic beverages generally uses paper labels, and the existing label adhesives mainly comprise casein glue, polyvinyl acetate adhesive, polyvinyl formal glue, acrylic acid adhesive and protein glue. Because of inherent defects of glass bottles, PET (polyethylene terephthalate) and OPP (oriented polypropylene) plastic bottles appear in European and American countries at present for replacing the existing glass bottles, but when the existing glass bottle label is used on the PET (polyethylene terephthalate) or OPP (oriented polypropylene) plastic bottle, the problem that the label directly falls off from the bottle body after glue is dried easily occurs. In addition, the production line of products also requires that the label adhesive has excellent initial adhesion, quick adhesion and high-speed operation performance, and although the label can be attached by the traditional paper plastic film-coated adhesive, the problems of label breakage, unevenness and the like are easy to occur during labeling, so that the shelf display effect of the products and the overall grade of the products are influenced.
Synthetic acrylate adhesives currently predominantly use one or more monomers, such as acrylates, methacrylates, vinyl acetate, specific carboxyl or multifunctional monomers, for binary or multiple copolymerization, as disclosed in chinese patent CN104271696A, a pressure sensitive adhesive composition comprising a) a first polymer which is an acrylate polymer or copolymer comprising a polymeric monomer selected from acrylic acid, butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, octyl acrylate, styrene, vinyl acetate and combinations thereof; and b) a second polymer selected from the group consisting of ethylene-acrylic acid copolymers, oxidized polyethylene, oxidized ethylene-vinyl acetate copolymers, maleated polyolefins, and combinations thereof; wherein the composition is water-based and suitable for pressure sensitive adhesion to a substrate. However, the pressure sensitive adhesive composition disclosed in this patent is not compatible with the requirements of high speed automatic labeling lines.
In addition, chain transfer agents mainly used in the current domestic synthesis of acrylate adhesives are dodecyl mercaptan, isopropanol and the like as chain transfer agents, for example, CN200710070953.5 discloses a non-woven fabric adhesive, which is prepared by taking styrene, acrylate, functional monomers and vinyl acetate as raw materials and adopting a core-shell emulsion polymerization method under the action of an initiator, a regulator, a buffering agent and an emulsifying agent, wherein the raw materials comprise the following components in parts by weight: 16-30 parts of styrene, 8-12 parts of acrylate, 1-2 parts of functional monomer and 50-70 parts of vinyl acetate, wherein the dosage of the monomers is regarded as 100 parts; the regulator is a mercaptan compound, the dosage of the mercaptan compound is 0.1-0.3 part, the dosage of the buffer is 0.30-0.50 part, the dosage of the emulsifier is 4.0-7.0 parts, the initiator is potassium persulfate or ammonium persulfate, the dosage of the potassium persulfate or ammonium persulfate is 0.40-0.80 part, and the dosage of the deionized water is 220-270 parts. The regulator (namely the chain transfer agent of the application) in the patent is a mercaptan, but the compounds have special odor, are difficult to volatilize, cannot be removed completely, have high energy consumption, pollute the environment and influence the product quality.
Disclosure of Invention
The invention provides a label adhesive for plastic bottles and a preparation method thereof, which solve the problems that the conventional label adhesive for plastic bottles has high synthesis energy consumption, pollutes the environment and has product quality which is difficult to meet the requirements of a high-speed automatic labeling production line.
In order to achieve the technical purpose, the technical scheme provided by the invention is as follows:
a label adhesive for plastic bottles is prepared from the following raw materials in parts by weight: 0.5-1.5 parts of vinyl acetate, 10-14 parts of butyl acrylate, 2-4 parts of 2-ethylhexyl acrylate, 3-5 parts of methacrylic acid, 2-4 parts of vinyl dimethoxysilane, 0.4-0.8 part of emulsifier, 0.05-0.15 part of initiator, 0.1-0.5 part of chain transfer agent and 0.3-0.5 part of defoaming agent.
Wherein, preferably, the emulsifier is a composite emulsifier, and the weight ratio of the composite emulsifier to the emulsifier is 1: 2 NP-10 and SE-10N.
Wherein, preferably, the initiator is potassium persulfate or ammonium persulfate.
Wherein, preferably, the chain transfer agent is a water-soluble low-molecular organic urea compound, and the organic urea compound is urea phosphate.
Wherein, preferably, the defoaming agent is a silicone defoaming agent.
A preparation method of a label adhesive for plastic bottles comprises the following steps:
(1) adding a proper amount of deionized water and an emulsifier into a glass container, homogenizing and emulsifying by using a high-speed dispersion emulsifying machine to obtain emulsion A, and storing for later use;
(2) adding vinyl acetate, butyl acrylate, 2-ethylhexyl acrylate, methacrylic acid and vinyl dimethoxysilane into a glass container according to the formula proportion, homogenizing and emulsifying by using a high-speed dispersion emulsifying machine to obtain pre-emulsified reaction liquid B, and storing for later use;
(3) adding an initiator into deionized water, and uniformly stirring to obtain an initiator solution with the mass percentage concentration of 8-12%;
(4) adding 100% of emulsion A, 15% of pre-emulsified reaction liquid B, a chain transfer agent, 20% of initiator solution and a defoaming agent into a four-mouth reaction bottle, starting stirring, and heating to 55 ℃; respectively placing 85% of pre-emulsified reaction liquid B and 70% of initiator solution into a dropping funnel, slowly dropping the pre-emulsified reaction liquid B and the initiator solution into the four-mouth reaction bottle, and after the dropping is finished, carrying out heat preservation reaction for 90 min; heating to 85 +/-2 ℃, adding the rest 10% of initiator solution at one time, continuing to react for 60min, cooling to 40 ℃ after the reaction is finished, adjusting the pH value to 6.5-7.0 by using ammonia water, and continuing to stir for 30min to obtain milky viscous liquid, namely the product.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the invention adopts a seed emulsion polymerization method, takes vinyl acetate, butyl acrylate, acrylic acid-2-ethylhexyl ester, methacrylic acid and vinyl dimethoxysilane as reaction monomers, takes a water-soluble low-molecular organic urea compound as a chain transfer agent, and synthesizes the novel label adhesive for the plastic bottle under the action of an emulsifier and an initiator.
(2) The novel label adhesive for plastic bottles is synthesized by taking a water-soluble low-molecular organic urea compound as a chain transfer agent, wherein the water-soluble low-molecular organic urea compound is a novel chain transfer agent, and the viscosity of the novel label adhesive for plastic bottles is in the range of 40-45 Pa.s. And the synthesis method is green and environment-friendly, improves the product quality, and really achieves the aims of being green, environment-friendly, economical and safe.
(3) The invention effectively improves the water resistance of the adhesive and reduces the production cost of the adhesive by multi-polymerizing the vinyl acetate monomer, the acrylic resin monomer and the vinyl dimethoxysilane.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments of the present invention, 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.
The chain transfer agent selected for the following implementation is a water-soluble low-molecular organic urea compound, specifically urea phosphate.
The defoaming agent is dimethyl polysiloxane organic silicon defoaming agent, such as ByK-141 in Germany.
The emulsifier is a compound emulsifier which is prepared from the following components in parts by weight of 1: 2 NP-10 and SE-10N.
Example 1
The embodiment provides a label adhesive for plastic bottles, which is prepared from the following raw materials in parts by weight: 1.0 part of vinyl acetate, 12 parts of butyl acrylate, 3 parts of acrylic acid-2-ethylhexyl ester, 4 parts of methacrylic acid, 3 parts of vinyl dimethoxy silane, 0.6 part of emulsifier, 0.1 part of potassium persulfate, 0.3 part of chain transfer agent and 0.4 part of defoaming agent.
The preparation method of the label adhesive for plastic bottles of the embodiment comprises the following steps:
(1) adding a proper amount of deionized water and an emulsifier into a glass container, homogenizing and emulsifying for 30s by using a high-speed dispersion emulsifying machine to obtain emulsion A, and storing for later use;
(2) adding vinyl acetate, butyl acrylate, 2-ethylhexyl acrylate, methacrylic acid and vinyl dimethoxysilane into a glass container according to the formula proportion, homogenizing and emulsifying for 90s by using a high-speed dispersion emulsifying machine to obtain pre-emulsified reaction liquid B, and storing for later use;
(3) adding potassium persulfate into deionized water, and uniformly stirring to obtain a potassium persulfate solution with the mass percentage concentration of 10%;
(4) adding 100% of emulsion A, 15% of pre-emulsified reaction liquid B, a chain transfer agent, 20% of potassium persulfate solution and a defoaming agent into a four-mouth reaction bottle, starting stirring, and heating to 55 ℃; respectively placing 85% of pre-emulsified reaction liquid B and 70% of potassium persulfate solution into a dropping funnel, slowly dropping into the four-mouth reaction bottle, keeping the temperature for 90min after dropping for about 50 min; heating to 85 +/-2 ℃, adding the remaining 10 percent of potassium persulfate solution at one time, continuing to react for 60min, cooling to 40 ℃ after the reaction is finished, adjusting the pH value to 6.8 by using ammonia water, and continuing to stir for 30min to obtain milky viscous liquid, namely the product.
Example 2
The embodiment provides a label adhesive for plastic bottles, which is prepared from the following raw materials in parts by weight: 1.0 part of vinyl acetate, 12 parts of butyl acrylate, 3 parts of acrylic acid-2-ethylhexyl ester, 4 parts of methacrylic acid, 0.6 part of emulsifier, 0.1 part of potassium persulfate, 0.3 part of chain transfer agent and 0.4 part of defoaming agent.
The preparation method of the label adhesive for plastic bottles of the embodiment comprises the following steps:
(1) adding a proper amount of deionized water and an emulsifier into a glass container, homogenizing and emulsifying for 30s by using a high-speed dispersion emulsifying machine to obtain emulsion A, and storing for later use;
(2) adding vinyl acetate, butyl acrylate, acrylic acid-2-ethylhexyl ester and methacrylic acid into a glass container according to a formula proportion, homogenizing and emulsifying for 90s by using a high-speed dispersion emulsifying machine to obtain pre-emulsified reaction liquid B, and storing for later use;
(3) adding potassium persulfate into deionized water, and uniformly stirring to obtain a potassium persulfate solution with the mass percentage concentration of 10%;
(4) adding 100% of emulsion A, 15% of pre-emulsified reaction liquid B, a chain transfer agent, 20% of potassium persulfate solution and a defoaming agent into a four-mouth reaction bottle, starting stirring, and heating to 55 ℃; respectively placing 85% of pre-emulsified reaction liquid B and 70% of potassium persulfate solution into a dropping funnel, slowly dropping into the four-mouth reaction bottle, keeping the temperature for 90min after dropping for about 50 min; heating to 85 +/-2 ℃, adding the remaining 10 percent of potassium persulfate solution at one time, continuing to react for 60min, cooling to 40 ℃ after the reaction is finished, adjusting the pH value to 6.8 by using ammonia water, and continuing to stir for 30min to obtain milky viscous liquid, namely the product.
Example 3
The embodiment provides a label adhesive for plastic bottles, which is prepared from the following raw materials in parts by weight: 0.5 part of vinyl acetate, 14 parts of butyl acrylate, 2 parts of acrylic acid-2-ethylhexyl ester, 5 parts of methacrylic acid, 2 parts of vinyl dimethoxy silane, 0.8 part of emulsifier, 0.05 part of potassium persulfate, 0.1 part of chain transfer agent and 0.3 part of defoaming agent.
The preparation method of the label adhesive for plastic bottles of the embodiment comprises the following steps:
(1) adding a proper amount of deionized water and an emulsifier into a glass container, homogenizing and emulsifying for 30s by using a high-speed dispersion emulsifying machine to obtain emulsion A, and storing for later use;
(2) adding vinyl acetate, butyl acrylate, 2-ethylhexyl acrylate, methacrylic acid and vinyl dimethoxysilane into a glass container according to the formula proportion, homogenizing and emulsifying for 90s by using a high-speed dispersion emulsifying machine to obtain pre-emulsified reaction liquid B, and storing for later use;
(3) adding potassium persulfate into deionized water, and uniformly stirring to obtain a potassium persulfate solution with the mass percentage concentration of 8%;
(4) adding 100% of emulsion A, 15% of pre-emulsified reaction liquid B, a chain transfer agent, 20% of potassium persulfate solution and a defoaming agent into a four-mouth reaction bottle, starting stirring, and heating to 55 ℃; respectively placing 85% of pre-emulsified reaction liquid B and 70% of potassium persulfate solution into a dropping funnel, slowly dropping into the four-mouth reaction bottle, keeping the temperature for 90min after dropping for about 50 min; heating to 85 +/-2 ℃, adding the remaining 10 percent of potassium persulfate solution at one time, continuing to react for 60min, cooling to 40 ℃ after the reaction is finished, adjusting the pH value to 6.5 by using ammonia water, and continuing to stir for 30min to obtain milky viscous liquid, namely the product.
Example 4
The embodiment provides a label adhesive for plastic bottles, which is prepared from the following raw materials in parts by weight: 1.5 parts of vinyl acetate, 10 parts of butyl acrylate, 4 parts of acrylic acid-2-ethylhexyl ester, 3 parts of methacrylic acid, 4 parts of vinyl dimethoxy silane, 0.4 part of emulsifier, 0.15 part of potassium persulfate, 0.5 part of chain transfer agent and 0.5 part of defoaming agent.
The preparation method of the label adhesive for plastic bottles of the embodiment comprises the following steps:
(1) adding a proper amount of deionized water and an emulsifier into a glass container, homogenizing and emulsifying for 30s by using a high-speed dispersion emulsifying machine to obtain emulsion A, and storing for later use;
(2) adding vinyl acetate, butyl acrylate, 2-ethylhexyl acrylate, methacrylic acid and vinyl dimethoxysilane into a glass container according to the formula proportion, homogenizing and emulsifying for 90s by using a high-speed dispersion emulsifying machine to obtain pre-emulsified reaction liquid B, and storing for later use;
(3) adding potassium persulfate into deionized water, and uniformly stirring to obtain a potassium persulfate solution with the mass percentage concentration of 12%;
(4) adding 100% of emulsion A, 15% of pre-emulsified reaction liquid B, a chain transfer agent, 20% of potassium persulfate solution and a defoaming agent into a four-mouth reaction bottle, starting stirring, and heating to 55 ℃; respectively placing 85% of pre-emulsified reaction liquid B and 70% of potassium persulfate solution into a dropping funnel, slowly dropping into the four-mouth reaction bottle, keeping the temperature for 90min after dropping for about 50 min; heating to 85 +/-2 ℃, adding the remaining 10 percent of potassium persulfate solution at one time, continuing to react for 60min, cooling to 40 ℃ after the reaction is finished, adjusting the pH value to 7.0 by using ammonia water, and continuing to stir for 30min to obtain milky viscous liquid, namely the product.
Example 5
The embodiment provides a label adhesive for plastic bottles, which is prepared from the following raw materials in parts by weight: 0.8 part of vinyl acetate, 13 parts of butyl acrylate, 2-4 parts of acrylic acid-2-ethylhexyl ester, 3.5 parts of methacrylic acid, 3.5 parts of vinyl dimethoxy silane, 0.5 part of emulsifier, 0.13 part of potassium persulfate, 0.2 part of chain transfer agent and 0.35 part of defoaming agent.
The preparation method of the label adhesive for plastic bottles of the embodiment comprises the following steps:
(1) adding a proper amount of deionized water and an emulsifier into a glass container, homogenizing and emulsifying for 30s by using a high-speed dispersion emulsifying machine to obtain emulsion A, and storing for later use;
(2) adding vinyl acetate, butyl acrylate, 2-ethylhexyl acrylate, methacrylic acid and vinyl dimethoxysilane into a glass container according to the formula proportion, homogenizing and emulsifying for 90s by using a high-speed dispersion emulsifying machine to obtain pre-emulsified reaction liquid B, and storing for later use;
(3) adding potassium persulfate into deionized water, and uniformly stirring to obtain a potassium persulfate solution with the mass percentage concentration of 9%;
(4) adding 100% of emulsion A, 15% of pre-emulsified reaction liquid B, a chain transfer agent, 20% of potassium persulfate solution and a defoaming agent into a four-mouth reaction bottle, starting stirring, and heating to 55 ℃; respectively placing 85% of pre-emulsified reaction liquid B and 70% of potassium persulfate solution into a dropping funnel, slowly dropping into the four-mouth reaction bottle, keeping the temperature for 90min after dropping for about 50 min; heating to 85 +/-2 ℃, adding the remaining 10 percent of potassium persulfate solution at one time, continuing to react for 60min, cooling to 40 ℃ after the reaction is finished, adjusting the pH value to 6.6 by using ammonia water, and continuing to stir for 30min to obtain milky viscous liquid, namely the product.
Example 6
The embodiment provides a label adhesive for plastic bottles, which is prepared from the following raw materials in parts by weight: 1.2 parts of vinyl acetate, 11 parts of butyl acrylate, 3.5 parts of acrylic acid-2-ethylhexyl ester, 4.5 parts of methacrylic acid, 2.5 parts of vinyl dimethoxy silane, 0.7 part of emulsifier, 0.06 part of ammonium persulfate, 0.4 part of chain transfer agent and 0.35 part of defoaming agent.
The preparation method of the label adhesive for plastic bottles of the embodiment comprises the following steps:
(1) adding a proper amount of deionized water and an emulsifier into a glass container, homogenizing and emulsifying for 30s by using a high-speed dispersion emulsifying machine to obtain emulsion A, and storing for later use;
(2) adding vinyl acetate, butyl acrylate, 2-ethylhexyl acrylate, methacrylic acid and vinyl dimethoxysilane into a glass container according to the formula proportion, homogenizing and emulsifying for 90s by using a high-speed dispersion emulsifying machine to obtain pre-emulsified reaction liquid B, and storing for later use;
(3) adding ammonium persulfate into deionized water, and uniformly stirring to obtain a potassium persulfate solution with the mass percentage concentration of 11%;
(4) adding 100% of emulsion A, 15% of pre-emulsified reaction liquid B, a chain transfer agent, 20% of ammonium persulfate solution and a defoaming agent into a four-mouth reaction bottle, starting stirring, and heating to 55 ℃; respectively placing 85% of pre-emulsified reaction liquid B and 70% of ammonium persulfate solution into a dropping funnel, slowly dropping into the four-mouth reaction bottle, keeping the temperature and reacting for 90min after dropping for about 50 min; heating to 85 +/-2 ℃, adding the rest 10% ammonium persulfate solution at one time, continuing to react for 60min, cooling to 40 ℃ after the reaction is finished, adjusting the pH value to 6.9 by using ammonia water, and continuing to stir for 30min to obtain milky viscous liquid, namely the product.
The performance of the label adhesive for plastic bottles prepared in the above examples was tested, and the results of the performance test are shown in table 1.
TABLE 1 Main physical and chemical performance indexes of the adhesive
The data show that the label adhesive for the plastic bottles prepared by the invention has excellent performance and is suitable for the requirements of high-speed automatic labeling production lines, and the water resistance of the adhesive can be obviously improved after the vinyldimethoxysilane monomer is added during polymerization.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. The label adhesive for the plastic bottle is characterized by being prepared from the following raw materials in parts by weight: 0.5-1.5 parts of vinyl acetate, 10-14 parts of butyl acrylate, 2-4 parts of 2-ethylhexyl acrylate, 3-5 parts of methacrylic acid, 2-4 parts of vinyl dimethoxysilane, 0.4-0.8 part of emulsifier, 0.05-0.15 part of initiator, 0.1-0.5 part of chain transfer agent and 0.3-0.5 part of defoaming agent;
the initiator is potassium persulfate or ammonium persulfate;
the chain transfer agent is a water-soluble low-molecular organic urea compound, and the organic urea compound is urea phosphate.
2. The label adhesive for plastic bottles of claim 1, wherein: the emulsifier is a composite emulsifier and is prepared from the following components in parts by weight of 1: 2 NP-10 and SE-10N.
3. The label adhesive for plastic bottles of claim 1, wherein: the defoaming agent is an organic silicon defoaming agent.
4. A method for preparing the label adhesive for plastic bottles according to any one of claims 1 to 3, characterized by comprising the steps of:
(1) adding a proper amount of deionized water and an emulsifier into a glass container, homogenizing and emulsifying by using a high-speed dispersion emulsifying machine to obtain emulsion A, and storing for later use;
(2) adding vinyl acetate, butyl acrylate, 2-ethylhexyl acrylate, methacrylic acid and vinyl dimethoxysilane into a glass container according to the formula proportion, homogenizing and emulsifying by using a high-speed dispersion emulsifying machine to obtain pre-emulsified reaction liquid B, and storing for later use;
(3) adding an initiator into deionized water, and uniformly stirring to obtain an initiator solution with the mass percentage concentration of 8-12%;
(4) adding 100% of emulsion A, 15% of pre-emulsified reaction liquid B, a chain transfer agent, 20% of initiator solution and a defoaming agent into a four-mouth reaction bottle, starting stirring, and heating to 55 ℃; respectively placing 85% of pre-emulsified reaction liquid B and 70% of initiator solution into a dropping funnel, slowly dropping the pre-emulsified reaction liquid B and the initiator solution into the four-mouth reaction bottle, and after the dropping is finished, carrying out heat preservation reaction for 90 min; heating to 85 +/-2 ℃, adding the rest 10% of initiator solution at one time, continuing to react for 60min, cooling to 40 ℃ after the reaction is finished, adjusting the pH value to 6.5-7.0 by using ammonia water, and continuing to stir for 30min to obtain milky viscous liquid, namely the product.
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| CN113771439A (en) * | 2021-09-17 | 2021-12-10 | 佛山市嘉信盈科技有限公司 | Non-woven fabric toughened water-absorbing acrylate high polymer material and preparation method thereof |
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| JP2017178992A (en) * | 2016-03-28 | 2017-10-05 | 東亞合成株式会社 | Active energy ray-curable tackifier adhesive composition for plastic film or sheet and method for producing laminate |
| CN109054691A (en) * | 2018-06-20 | 2018-12-21 | 滁州市光威化工有限公司 | A kind of organic-silicon-modified copolymer emulsion glue for connecting and preparation method thereof |
| CN108822768A (en) * | 2018-06-20 | 2018-11-16 | 滁州市光威化工有限公司 | A kind of preparation method by organic-silicon-modified high speed glue for connecting |
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Application publication date: 20201023 Assignee: HENAN LUAO CHEMICAL TECHNOLOGY CO.,LTD. Assignor: HIGH & NEW TECHNOLOGY RESEARCH CENTER, HENAN ACADEMY OF SCIENCES Contract record no.: X2023980041189 Denomination of invention: A label adhesive for plastic bottles and its preparation method Granted publication date: 20210608 License type: Exclusive License Record date: 20230906 |
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