CN108977115A - A kind of waterborne polyurethane pressure-sensitive adhesives and the preparation method and application thereof - Google Patents
A kind of waterborne polyurethane pressure-sensitive adhesives and the preparation method and application thereof Download PDFInfo
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- CN108977115A CN108977115A CN201810860129.8A CN201810860129A CN108977115A CN 108977115 A CN108977115 A CN 108977115A CN 201810860129 A CN201810860129 A CN 201810860129A CN 108977115 A CN108977115 A CN 108977115A
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
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- C09J7/00—Adhesives in the form of films or foils
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Abstract
The invention discloses a kind of waterborne polyurethane pressure-sensitive adhesives and the preparation method and application thereof, waterborne polyurethane pressure-sensitive adhesives include the component of following parts by weight: 80~100 parts of polyether polyol, 80~100 parts of 4,4 methyl diphenylene diisocyanate, 30~50 parts of trimethylolpropane, 10~15 parts of dihydromethyl propionic acid, 1~2 part of dibutyl tin dilaurate, 10~30 parts of epoxy resin, 1.5~4.5 parts of N methyl pyrrolidone, 20~30 parts of aqueous polyisocyanate crosslinker.Waterborne polyurethane pressure-sensitive adhesives of the invention can be applied in the bonding of a variety of laminated films such as CPP film, PET film, aluminizer, PE film, have the characteristics that high solids content, peel resistance are strong, water resistance is strong, coating speed block when use, coating temperature is low and coating efficiency is high.
Description
Technical field
The present invention relates to polymeric material fields, more specifically to a kind of waterborne polyurethane pressure-sensitive adhesives and its preparation
Method and application.
Background technique
Laminated film is used widely in various fields, and it is acrylate pressure mostly that existing laminating glue, which sticks agent,
The polyurethane contact adhesive of quick glue, only a few is applied on laminated film.Existing polyurethane contact adhesive show hold viscosity it is not high,
The disadvantages of peel resistance is low, weatherability is bad, polymerisation in solution mode pollutes environment.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing a kind of aqueous polyurethane
Pressure sensitive adhesive and the preparation method and application thereof.The waterborne polyurethane pressure-sensitive adhesives applied in laminated film of the invention have large arch dam
Amount, the feature that peel resistance is strong, water resistance is strong, coating speed block when use, coating temperature is low and coating efficiency is high.
The technical solution adopted by the present invention to solve the technical problems is: a kind of waterborne polyurethane pressure-sensitive adhesives are provided, including
The component of following parts by weight: 80~100 parts of polyether polyol, 80~100 parts of 4,4- methyl diphenylene diisocyanate, three hydroxyl first
30~50 parts of base propane, 10~15 parts of dihydromethyl propionic acid, 1~2 part of dibutyl tin dilaurate, 10~30 parts of epoxy resin,
1.5~4.5 parts of N-Methyl pyrrolidone, 20~30 parts of aqueous polyisocyanate crosslinker.
Preferably, the polyether polyol be selected from one of N220 type polyether polyol or N210 type polyether polyol or
The mixture arbitrarily matched.
Preferably, the aqueous polyisocyanate crosslinker be selected from toluene di-isocyanate(TDI), '-diphenylmethane diisocyanate,
One of dimethylene diphenyl diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate are two or more
Composition.
Preferably, which further includes the easy volatile solvent of 1~3 part of parts by weight, described volatile molten
Agent is selected from the mixture of one or both of 1,4-butanediol, ethyl acetate.
The present invention also provides a kind of preparation methods of waterborne polyurethane pressure-sensitive adhesives, include the following steps:
(1) it in the four-hole boiling flask equipped with electric mixer, reflux condenser, thermometer and constant pressure funnel, is added
Polyether polyol, aqueous polyisocyanate crosslinker, dibutyl tin dilaurate after heating, carry out insulation reaction；
(2) trimethylolpropane, dihydromethyl propionic acid, 4,4- diphenylmethane diisocyanate is added into four-hole boiling flask again
Ester, epoxy resin, N-Methyl pyrrolidone and acetone carry out back flow reaction；
(3) then cool down, be neutralized to pH6.5~7.5 with pH adjusting agent, finally with containing 1% adipic dihydrazide go from
Sub- water carries out emulsification pretreatment, quickly stirs；
(4) adhesive is dissipated to get to milky polyurethane aqueous with Rotary Evaporators abjection acetone；
(5) dry to obtain waterborne polyurethane pressure-sensitive adhesives later.
Preferably, in step (1), the condition of the insulation reaction are as follows: in the case where temperature is 75~80 DEG C, insulation reaction
1.5~2h.
Preferably, in step (2), the condition of the back flow reaction are as follows: temperature be 75~80 DEG C, back flow reaction 3.5
~4h；Trimethylolpropane, dihydromethyl propionic acid, 4,4- methyl diphenylene diisocyanate, epoxy resin, N- methyl is being added
It further include the easy volatile solvent of 1~3 part of parts by weight of addition when pyrrolidones, the easy volatile solvent is selected from 1,4-butanediol, second
The mixture of one or both of acetoacetic ester.
Preferably, in step (3), 35 DEG C are cooled to hereinafter, being neutralized to pH6.5~7.5 with triethylamine；Stirring 20~
30min。
Preferably, in step (5), drying condition is the electric drying oven with forced convection for being 110~120 DEG C by temperature setting
Dry 10~15min.
The present invention also provides a kind of preparation methods of laminated film polyurethane pressure sensitive adhesive tape, include the following steps:
(1) prepare a release film, will be applied in advance such as the described in any item waterborne polyurethane pressure-sensitive adhesives of claim 5~8
The one side of release film；
(2) release film with waterborne polyurethane pressure-sensitive adhesives after processing in step (1) is dry by electric drying oven with forced convection
It is dry, it then takes out to be placed in dry environment and is cooled to room temperature；
(3) release film after cooling with waterborne polyurethane pressure-sensitive adhesives fits in the one side of substrate, while should be from
Type film stripping achievees the effect that transfer lamination pressure sensitive adhesive；
(4) step (1)~(2) are repeated, the waterborne polyurethane pressure-sensitive adhesives being applied on second release film in advance are shifted and pasted
It is coiled together with the release film together in the another side of substrate, obtain polyurethane pressure sensitive adhesive tape.
Preferably, in step (2), the temperature of the electric drying oven with forced convection is 110~120 DEG C, dry 10~
15min。
Implement waterborne polyurethane pressure-sensitive adhesives and preparation method thereof of the invention, has the advantages that
(1) waterborne polyurethane pressure-sensitive adhesives applied in laminated film of the invention have high solids content, peel resistance it is strong,
The strong feature of water resistance, coating speed block when use, coating temperature is low and coating efficiency is high.
(2) right in the present invention is 95%~100%, and lotion has the storage stability of good appearance and long period.
(3) stronger adhesive property is shown to a variety of laminated films, peel strength further increases, appearance stable storing
Property is good.
(4) it is used for the bonding (CPP/PET/ aluminizer, PE) of composite film material, shows good performance.
Specific embodiment
In the following, being described further in conjunction with specific embodiment to the present invention:
In the present invention, if not refering in particular to, all parts, percentage are unit of weight, used equipment and raw material etc.
It is commercially available or commonly used in the art.Method in following embodiments is unless otherwise instructed the normal of this field
Rule method.
A kind of waterborne polyurethane pressure-sensitive adhesives, the component including following parts by weight: 80~100 parts of polyether polyol, 4,4- bis-
80~100 parts of methylenebis phenyl isocyanate, 30~50 parts of trimethylolpropane, 10~15 parts of dihydromethyl propionic acid, two laurels
1~2 part of sour dibutyl tin, 10~30 parts of epoxy resin, 1.5~4.5 parts of N-Methyl pyrrolidone, aqueous multi isocyanate crosslinking
20~30 parts of agent.
Preferably, the polyether polyol be selected from one of N220 type polyether polyol or N210 type polyether polyol or
The mixture arbitrarily matched.More preferably total molecular weight Mn=2000, wherein dihydric alcohol molecular weight < 1000, trihydroxylic alcohol molecule
The polyether polyol of amount > 1000.Inventors have found that the ratio of polyether Glycols needed for polyurethane contact adhesive and polyether-tribasic alcohol
Have with pressure sensitive adhesive characteristic compared with Important Relations, the study found that working as the ratio between hydroxyl value contained by hydroxyl value contained by dihydric alcohol and trihydroxylic alcohol
Between 1~10, R value works as the molecular weight>1000 of dihydric alcohol molecular weight<1000, trihydroxylic alcohol, energy between 0.8~1.15
The preferable pressure sensitive adhesive of synthesis performance.
Preferably, the aqueous polyisocyanate crosslinker is preferably aromatic isocyanate, is selected from toluene diisocynate
Ester (TDI), '-diphenylmethane diisocyanate, dimethylene diphenyl diisocyanate, hexamethylene diisocyanate, isophorone two are different
One of cyanate or two or more compositions.Most preferably toluene di-isocyanate(TDI) (TDI).
It can be coexisted steadily in the long term with resin containing active group under aqueous polyisocyanate crosslinker room temperature, after solvent volatilization,
Film latent aqueous polyisocyanate crosslinker after Overheating Treatment releases-NCO group and on molecular resin chain
Amino groups react to form crosslinking, can significantly improve the cohesive strength of adhesive for polyurethane, hold viscosity and 180 ° of peel strengths.
Further, addition is a small amount of harmless in waterborne polyurethane pressure-sensitive adhesives (aqueous PU glue sticks agent) easily waves
Solvent is sent out, the rate of drying of adhesive can be accelerated, improves the production efficiency of compounding process, easy volatile solvent dosage is 1
The mixture of one or both of~3 parts of parts by weight, preferably 1,4-butanediol (BDO), ethyl acetate.
In the present invention, the addition of dihydromethyl propionic acid (DMPA), the modified groups such as carboxyl-COOH hinder hard section region
The formation of microfacies, and make phenomenon of phase separation between soft and hard segments unobvious.Simultaneously because-COOH hydrophily is preferable, and more
It is enriched in surface, hydrogen bond is formed with adherend, so that system peel strength be made to increase.
The present invention also provides a kind of preparation methods of waterborne polyurethane pressure-sensitive adhesives, include the following steps:
(1) it in the four-hole boiling flask equipped with electric mixer, reflux condenser, thermometer and constant pressure funnel, is added
Polyether polyol, aqueous polyisocyanate crosslinker, dibutyl tin dilaurate, to 75~80 DEG C after heating, at such a temperature
Carry out 1.5~2h of insulation reaction；The drop speed of constant pressure funnel is conventional drop speed.
(2) trimethylolpropane (TMP), dihydromethyl propionic acid (DMPA), 4,4- diphenyl is added into four-hole boiling flask again
Methane diisocyanate (MDI), epoxy resin (E-44), N-Methyl pyrrolidone (NMP) and acetone are 75~80 in temperature
DEG C, 3.5~4h of back flow reaction；Preferably, in step 2), trimethylolpropane, dihydromethyl propionic acid, 4,4- hexichol is being added
It further include that easy volatile solvent is added when dicyclohexylmethane diisocyanate, epoxy resin, N-Methyl pyrrolidone, it is described volatile molten
Agent is selected from the mixture of one or both of 1,4-butanediol, ethyl acetate.It sticks and is added in agent on a small quantity to people in aqueous PU glue
The harmless easy volatile solvent of body, can accelerate the rate of drying of adhesive, improve the production efficiency of compounding process.The present invention
Aqueous polyurethane is synthesized using acetone method (phase transition method), it is that synthesis is with hydrophilic radical in acetone that acetone effect, which is added,
Slowly plus water phase transition occurs for base polyurethane prepolymer for use as when reaching a certain amount of, water becomes continuous phase, and the poly- ammonia being swollen by acetone
Ester particle becomes discontinuous phase, becomes polyurethane aqueous dispersion, deviates from acetone again after completing synthesis.
(3) 35 DEG C are then cooled to hereinafter, pH6.5~7.5 are neutralized to pH adjusting agent, finally with containing 1% adipic acid two
The deionized water of hydrazides carries out emulsification pretreatment, quickly stirs；Stir 20~30min；
(4) adhesive is dissipated to get to milky polyurethane aqueous with Rotary Evaporators abjection acetone；
(5) the dry 10~15min of the electric drying oven with forced convection for being 110~120 DEG C by temperature setting obtains pressure sensitive adhesive.
Right in waterborne polyurethane pressure-sensitive adhesives of the invention is 95%~100%, and lotion has good appearance and longer
The storage stability of time.Stronger adhesive property is shown to a variety of laminated films, peel strength further increases, appearance storage
It deposits and has good stability.
The invention also includes a kind of preparation methods of laminated film polyurethane pressure sensitive adhesive tape, include the following steps:
(1) prepare a release film, waterborne polyurethane pressure-sensitive adhesives as described above are applied to the one side of release film in advance；
(2) release film with waterborne polyurethane pressure-sensitive adhesives after processing in step (1) is dry by electric drying oven with forced convection
Dry, the temperature of the electric drying oven with forced convection is 110~120 DEG C, dry 10~15min；It then takes out and is placed in dry environment
It is cooled to room temperature；
(3) release film after cooling with waterborne polyurethane pressure-sensitive adhesives fits in the one side of substrate, while should be from
Type film stripping achievees the effect that transfer lamination pressure sensitive adhesive；
(4) step (1)~(2) are repeated, the waterborne polyurethane pressure-sensitive adhesives being applied on second release film in advance are shifted and pasted
It is coiled together with the release film together in the another side of substrate, obtain polyurethane pressure sensitive adhesive tape.
The substrate is composite film material, is one of CPP film, PET film, aluminizer, PE film.
Embodiment 1
A kind of laminated film high-performance water-based polyurethane pressure sensitive adhesive, the component including following parts by weight:
N220 type polyether polyol, 80 parts
4,4- methyl diphenylene diisocyanates (MDI), 80 parts
Trimethylolpropane (TMP), 30 parts
Dihydromethyl propionic acid (DMPA), 10 parts
Dibutyl tin dilaurate (DBTDL), 1 part
Epoxy resin E-44,10 parts
N-Methyl pyrrolidone (NMP), 1.5 parts
Toluene di-isocyanate(TDI) (TDI), 20 parts
Easy volatile solvent ethyl acetate, 1 part
The synthesis of waterborne polyurethane pressure-sensitive adhesives:
(1) it in the four-hole boiling flask equipped with electric mixer, reflux condenser, thermometer and constant pressure funnel, is added
N220 type polyether polyol, TD, DBTDL are warming up to 75 DEG C, insulation reaction 1.5h；
(2) ethyl acetate, TMP, DMPA, MDI, epoxy resin E-44, acetone and N crassitude is added into flask again
Ketone cosolvent, 75 DEG C of back flow reaction 3h；
(3) 35 DEG C are then cooled to hereinafter, being neutralized to pH=6.5 with triethylamine, finally use is containing 1% adipic dihydrazide
Deionized water carries out emulsification pretreatment, quickly stirs 20min；
(4) adhesive is dissipated to get to milky polyurethane aqueous with Rotary Evaporators abjection acetone；
(5) the dry 15min of the electric drying oven with forced convection for being 115 DEG C by temperature setting obtains pressure sensitive adhesive.
A kind of laminated film high-performance water-based polyurethane pressure sensitive adhesive tape, preparation method include the following steps:
(1) prepare a release film, by the above-mentioned one side for preparing stand-by polyurethane contact adhesive and being applied to release film in advance；
(2) electric heating for being 115 DEG C by temperature setting by the release film with polyurethane contact adhesive after processing in step (1)
Air dry oven dries 10min, then takes out to be placed in dry environment and is cooled to room temperature；
(3) release film with polyurethane contact adhesive after cooling fits in the one side of substrate, while should be from
Type film stripping achievees the effect that transfer lamination pressure sensitive adhesive；
(4) repeat the above steps (1)~(2), and then by the pressure sensitive adhesive being applied on second release film in advance transfer, fitting
It is coiled together with the release film in the another side of substrate, obtain the polyurethane pressure sensitive adhesive tape.
Embodiment 2
A kind of laminated film high performance polyurethane pressure sensitive adhesive, the component including following parts by weight:
N210 type polyether polyol, 90 parts
4,4- methyl diphenylene diisocyanates (MDI), 90 parts
Trimethylolpropane (TMP), 40 parts
Dihydromethyl propionic acid (DMPA), 12 parts
Dibutyl tin dilaurate (DBTDL), 1.5 parts
Epoxy resin E-44,20 parts
N-Methyl pyrrolidone (NMP), 3 parts
Toluene di-isocyanate(TDI) (TDI), 25 parts
1,4-butanediol (BDO), 2 parts.
The synthesis of waterborne polyurethane pressure-sensitive adhesives:
(1) it in the four-hole boiling flask equipped with electric mixer, reflux condenser, thermometer and constant pressure funnel, is added
N210 type polyether polyol, TDI, DBTDL are warming up to 78 DEG C, insulation reaction 2h；
(2) BDO, TMP, DMPA, MDI, epoxy resin E-44, acetone and N- crassitude is added into four-hole boiling flask again
Ketone cosolvent, 78 DEG C of back flow reaction 3.5h；
(3) 35 DEG C are then cooled to hereinafter, being neutralized to pH=7 with triethylamine, finally use is gone containing 1% adipic dihydrazide
Ionized water carries out emulsification pretreatment, quickly stirs 25min；
(4) adhesive is dissipated to get to milky polyurethane aqueous with Rotary Evaporators abjection acetone；
(5) pressure sensitive adhesive is obtained after the dry 15min of the electric drying oven with forced convection for being 115 DEG C by temperature setting.
A kind of laminated film high performance polyurethane pressure sensitive adhesive tape, preparation method include the following steps:
(1) prepare a release film, by the above-mentioned one side for preparing stand-by polyurethane contact adhesive and being applied to release film in advance；
(2) electric heating for being 115 DEG C by temperature setting by the release film with polyurethane contact adhesive after processing in step (1)
Air dry oven dries 15min, then takes out to be placed in dry environment and is cooled to room temperature；
(3) release film with polyurethane contact adhesive after cooling fits in the one side of substrate, while should be from
Type film stripping achievees the effect that transfer lamination pressure sensitive adhesive；
(4) repeat the above steps (1)~(2), and then by the pressure sensitive adhesive being applied on second release film in advance transfer, fitting
It is coiled together with the release film in the another side of substrate, obtain the polyurethane pressure sensitive adhesive tape.
Embodiment 3
A kind of laminated film high performance polyurethane pressure sensitive adhesive, the component including following parts by weight:
N220 type polyether polyol, 100 parts
4,4- methyl diphenylene diisocyanates (MDI), 100 parts
Trimethylolpropane (TMP), 50 parts
Dihydromethyl propionic acid (DMPA), 15 parts
Dibutyl tin dilaurate (DBTDL), 2 parts
Epoxy resin E-44,20 parts
N-Methyl pyrrolidone (NMP), 4.5 parts
Toluene di-isocyanate(TDI) (TDI), 30 parts
1,4-butanediol (BDO), 3 parts.
Aqueous PU glue sticks the synthesis of agent:
(1) it in the four-hole boiling flask equipped with electric mixer, reflux condenser, thermometer and constant pressure funnel, is added
N220 type polyether polyol, TDI, DBTDL are warming up to 80 DEG C, insulation reaction 2h；
(2) BDO, TMP, DMPA, MDI, epoxy resin E-44, acetone and N-Methyl pyrrolidone are added into flask again to help
Solvent, 75~80 DEG C of back flow reaction 4h；
(3) 35 DEG C are then cooled to hereinafter, being neutralized to pH=7.5 with triethylamine, finally use is containing 1% adipic dihydrazide
Deionized water carries out emulsification pretreatment, quickly stirs 30min；
(4) adhesive is dissipated to get to milky polyurethane aqueous with Rotary Evaporators abjection acetone；
(5) pressure sensitive adhesive is obtained after the dry 15min of the electric drying oven with forced convection for being 115 DEG C by temperature setting.
A kind of laminated film high-performance water-based polyurethane pressure sensitive adhesive tape, preparation method include the following steps:
(1) prepare a release film, by the above-mentioned one side for preparing stand-by polyurethane contact adhesive and being applied to release film in advance；
(2) the electric heating air blast for being 115 DEG C by temperature setting by the release film with polyurethane contact adhesive after processing in (1)
Drying box dries 15min, then takes out to be placed in dry environment and is cooled to room temperature；
(3) release film with polyurethane contact adhesive after cooling fits in the one side of substrate, while should be from
Type film stripping achievees the effect that transfer lamination pressure sensitive adhesive；
(4) repeat the above steps (1)~(2), and then by the pressure sensitive adhesive being applied on second release film in advance transfer, fitting
It is coiled together with the release film in the another side of substrate, obtain the polyurethane pressure sensitive adhesive tape.
Performance test and effect assessment
1. pressure sensitive adhesive tape made from test the present embodiment 1~3 is bonded CPP film, PET film, aluminizer, 180 ° of PE film respectively
Peel strength holds viscosity, tack, the results are shown in Table 1.
It holds viscosity: being tested according to GB/T4851-1998 standard method.
Tack: it is tested according to GB/T4852-2002 standard method.
180 ° of peel strengths: it is tested according to GB/T2792-1998 standard method.
1 adhesive for polyurethane of table is bonded the performance test of all kinds of films
The existing conventional polyurethanes adhesive tape for film bond on the market, tack are usually less than No. 6 balls, in table 1 just
Viscosity test only has aluminizer to have No. 6 balls, other tests are above No. 6 balls；Conventional polyurethanes adhesive tape is held sticky usually small
Viscosity is held measured by 12Hr, table 1 and is all larger than 24Hr, shows to improve a lot on the basis of existing adhesive tape；Common poly- ammonia
180 ° of peel strengths of ester gum band are usually less than 15N/25mm, and measured 180 ° of peel strengths are all larger than this numerical value in table 1；From table 1
Test result can be seen that waterborne polyurethane pressure-sensitive adhesives of the invention for film bond (CPP, PET, aluminizer, PE film) table
Reveal excellent performance, is promoted on the basis of conventional polyurethanes pressure sensitive adhesive.
2. the solid content and water resistance of pressure sensitive adhesive tape made from the present embodiment 1~3 are detected, as a result such as the following table 2.(with
The existing conventional polyurethanes adhesive tape for film bond is comparative example 1 on the market)
Solid content test: according to the measuring method GB/T2793-1995 of adhesive non-volatile content, to the present embodiment 1
Pressure sensitive adhesive made from~3 carries out solid content test.
Water resistance test: according to the measuring method GB/T13353-92 of adhesive chemical-resistant reagent, to the present embodiment 1~
Pressure sensitive adhesive made from 3 carries out water resistance test, and reagent selects distilled water, and 40 DEG C of soaking temperature, soaking time is Qi Tashi for 24 hours
Condition is tested referring to this standard.
The solid content and water resistance of 2 aqueous polyurethane of table are tested
It can be obtained from the data result of table 2, the solid content of waterborne polyurethane pressure-sensitive adhesives of the invention is relative to conventional polyurethanes
Pressure sensitive adhesive is higher by very much, and table 2 measures water resistance result and is better than conventional polyurethanes pressure sensitive adhesive, shows polyurethane pressure sensitive of the invention
Glue has high solids content and the strong feature of water resistance.
It will be apparent to those skilled in the art that can technical solution and design as described above, make various other phases
The change and deformation answered, and all these change and deformation all should belong to the claims in the present invention protection scope it
It is interior.
Claims (11)
1. a kind of waterborne polyurethane pressure-sensitive adhesives, which is characterized in that the component including following parts by weight: polyether polyol 80~100
Part, 80~100 parts of 4,4- methyl diphenylene diisocyanate, 30~50 parts of trimethylolpropane, dihydromethyl propionic acid 10~15
Part, 1~2 part of dibutyl tin dilaurate, 10~30 parts of epoxy resin, 1.5~4.5 parts of N-Methyl pyrrolidone, aqueous polyisocyanate
20~30 parts of isocyanate cross-linking agent.
2. waterborne polyurethane pressure-sensitive adhesives as described in claim 1, which is characterized in that the polyether polyol is poly- selected from N220 type
One of ethoxylated polyhydric alcohol or N210 type polyether polyol or the mixture arbitrarily matched.
3. waterborne polyurethane pressure-sensitive adhesives as described in claim 1, which is characterized in that the aqueous polyisocyanate crosslinker choosing
From toluene di-isocyanate(TDI), '-diphenylmethane diisocyanate, dimethylene diphenyl diisocyanate, hexamethylene diisocyanate, different
One of isophorone diisocyanate or two or more compositions.
4. waterborne polyurethane pressure-sensitive adhesives as described in claim 1, which is characterized in that the waterborne polyurethane pressure-sensitive adhesives further include 1
The easy volatile solvent of~3 parts of parts by weight, the easy volatile solvent are selected from one or both of 1,4-butanediol, ethyl acetate
Mixture.
5. a kind of preparation method of waterborne polyurethane pressure-sensitive adhesives, which comprises the steps of:
(1) in the four-hole boiling flask equipped with electric mixer, reflux condenser, thermometer and constant pressure funnel, polyethers is added
Polyalcohol, aqueous polyisocyanate crosslinker, dibutyl tin dilaurate after heating, carry out insulation reaction；
(2) again into four-hole boiling flask be added trimethylolpropane, dihydromethyl propionic acid, 4,4- methyl diphenylene diisocyanate,
Epoxy resin, N-Methyl pyrrolidone and acetone carry out back flow reaction；
(3) then cool down, be neutralized to pH6.5~7.5 with pH adjusting agent, finally with the deionized water for containing 1% adipic dihydrazide
Emulsification pretreatment is carried out, is quickly stirred；
(4) adhesive is dissipated to get to milky polyurethane aqueous with Rotary Evaporators abjection acetone；
(5) dry to obtain waterborne polyurethane pressure-sensitive adhesives later.
6. preparation method as claimed in claim 5, which is characterized in that in step (1), the condition of the insulation reaction are as follows:
In the case where temperature is 75~80 DEG C, 1.5~2h of insulation reaction.
7. preparation method as claimed in claim 5, which is characterized in that in step (2), the condition of the back flow reaction are as follows:
It is 75~80 DEG C in temperature, 3.5~4h of back flow reaction；Trimethylolpropane, dihydromethyl propionic acid, 4,4- diphenylmethyl is being added
It further include the easy volatile solvent of 1~3 part of parts by weight of addition, institute when alkane diisocyanate, epoxy resin, N-Methyl pyrrolidone
State the mixture that easy volatile solvent is selected from one or both of 1,4-butanediol, ethyl acetate.
8. preparation method as claimed in claim 5, which is characterized in that in step (3), be cooled to 35 DEG C hereinafter, with three second
Amine is neutralized to pH6.5~7.5；Stir 20~30min.
9. preparation method as claimed in claim 5, which is characterized in that in step (5), drying condition is to pass through temperature setting
For the dry 10~15min of 110~120 DEG C of electric drying oven with forced convections.
10. a kind of preparation method of laminated film polyurethane pressure sensitive adhesive tape, which comprises the steps of:
(1) prepare a release film, will be applied in advance such as the described in any item waterborne polyurethane pressure-sensitive adhesives of claim 5~9 release
The one side of film；
(2) release film with waterborne polyurethane pressure-sensitive adhesives after processing in step (1) is dry by electric drying oven with forced convection, so
It takes out to be placed in dry environment afterwards and be cooled to room temperature；
(3) release film after cooling with waterborne polyurethane pressure-sensitive adhesives fits in the one side of substrate, while by the release film
Removing, achievees the effect that transfer lamination pressure sensitive adhesive；
(4) step (1)~(2) are repeated, the waterborne polyurethane pressure-sensitive adhesives being applied on second release film in advance are shifted and fitted in
The another side of substrate, it is coiled together with the release film, obtain polyurethane pressure sensitive adhesive tape.
11. preparation method as claimed in claim 10, which is characterized in that in step (2), the electric drying oven with forced convection
Temperature is 110~120 DEG C, dry 10~15min.
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| CN111269686A (en) * | 2020-04-03 | 2020-06-12 | 山东奥德美高分子材料有限公司 | High-fastness waterborne polyurethane transfer glue for offset printing |
| CN113817201A (en) * | 2021-09-26 | 2021-12-21 | 佛山市彩龙镀膜包装材料有限公司 | Preparation method of ultrahigh-barrier polyester aluminized film |
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Application publication date: 20181211 |