CN105131896B - Method for preparing polyurethane hot melt adhesive capable of achieving quick positioning - Google Patents
Method for preparing polyurethane hot melt adhesive capable of achieving quick positioning Download PDFInfo
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- CN105131896B CN105131896B CN201510660580.1A CN201510660580A CN105131896B CN 105131896 B CN105131896 B CN 105131896B CN 201510660580 A CN201510660580 A CN 201510660580A CN 105131896 B CN105131896 B CN 105131896B
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Abstract
The invention relates to a method for preparing polyurethane hot melt adhesive capable of achieving quick positioning. The preparing method includes the steps that 1, reactive tackifier and hydrogenated bisphenol A are added into a reaction still, dehydration is conducted for 2 hours at the temperature of 110 DEG C and the pressure intensity of -0.095 MPa, the mixture is cooled to 70 DEG C, a catalyst and polyisocyanate are added, stirring is conducted at the rotation speed of 400-700 r/min, a reaction is conducted for 1-3 hours at the temperature of 70 DEG C-80 DEG C, then a silane modifier is added, a reaction is conducted for 2-5 hours at the temperature of 70 DEG C-80 DEG C, and modified prepolymer at the sending end of silane is obtained; 2, dehydration is conducted on polyester polyol, polyether polyol and acrylic resin for 2 hours at the temperature of 120 DEG C and the pressure intensity of -0.095 MPa, after dehydration is conducted, the polyisocyanate is added, stirring is conducted at the rotation speed of 400-700 r/min, a reaction is conducted for 1-3 hours at the temperature of 100 DEG C-120 DEG C, then the prepared modified prepolymer at the sending end of the silane, antioxygen and the catalyst are added, the temperature is raised to 110 DEG C, vacuumizing is conducted till the pressure intensity is below -0.095 MPa, air bubble removing is conducted for 30 minutes, discharging and sealed packing are conducted, and the polyurethane hot melt adhesive capable of achieving quick positioning is obtained.
Description
Technical field
The present invention relates to a kind of preparation method of the polyurethane hot melt for being capable of achieving quick positioning, belong to chemical adhesive neck
Domain.
Background technology
Currently, in the streamline link of touch-screen encapsulation manufacture, the requirement to improve production efficiency is extremely urgent.At present
Commonly using traditional PUR carries out positioning package.Because traditional PUR initial bonding strength is low, positioning time is long, adhesive strength
Low, its 5 minutes initial alignment intensity is less than 0.1MPa, it is therefore necessary to pressurize is carried out by fixed appliance, to meet pressing
Quality.The requirement of encapsulation laminating is disclosure satisfy that in order to ensure device, the time of generally pressurize needs more than 2 hours, sternly
The production efficiency of touch-screen encapsulation manufacture is constrained again, and pressurize utensil is a lot, wastes substantial amounts of resource and space, improves
The cost of manufacture.Meanwhile, because the low shortcoming of traditional hot-melt adhesive adhesive strength, the adhesive strength of 24 hours less than 4.0MPa,
Cause product percent defective high.Therefore, a kind of quick positioning package material, the active demand as the field are researched and developed.
Research and develop quick positioning package material to develop abroad rapidly, dominant company is including Henkel, Fuller, 3M companies etc..I
State's starting is than later, and research and development institution is less, main including Darbond Technology Co., Ltd., Yantai etc..Therefore quick positioning package material
Research and development, market potential is huge.
The content of the invention
In order to solve, the initial adhesive strength that polyurethane hot melt is present in the prior art is low, cannot quickly position, cold-and-heat resistent is rushed
Poor poor performance, salt spray resistance, loss of properties on aging and the low weakness of adhesive strength are hit, the present invention provides a kind of being capable of achieving soon
Polyurethane hot melt of speed positioning and preparation method thereof, the polyurethane hot melt that it is prepared is single-component mist-solidifying polyurethane adhesive
Stick, belongs to solvent-free environment-protection adhesive industry, is suitable to the bonding of plastics and various metals base material.
The present invention relates to a kind of polyurethane hot melt for being capable of achieving quick positioning, possesses tack high, 5min after applying glue
Adhesive strength is higher than 0.5MPa, is capable of achieving quick positioning, and then the material can crosslink reaction by solidify afterwards, so as to improve
The bulk strength of material, heat resistance, water-fast and chemical-resistance.
The polyurethane hot melt for being capable of achieving quick positioning of the invention can embody several big advantages：（1）Good is flexible
Property and adhesive strength, can overcome the influence of the expansion coefficient difference between different materials, stress distribution is uniform, so as to encapsulate difference
The base material of type；（2）Initial adhesive strength is high：The adhesive strength of 5min is higher than 0.5MPa after applying glue；（3）Open hour are short：It is less than
3min；（4）Viscosity is low easy to operate：100 DEG C of melting viscosities are less than 8Pa.S；（5）Heat endurance is good：120 DEG C of heating, 5 hours viscosity
Lift-off value is less than 30%；（6）Drop impact resistance can be good：Roller falls higher than 300 times；（7）Final strength is high：PC is bonded with PET material
Intensity is higher than 7MPa.
Polyurethane hot melt of the invention can realize that the mechanism of quick positioning is：Using xylene formaldehyde resin and extraordinary third
Used as composite modifier, the two plays synergy to olefin(e) acid resin, produces effect of the one-plus-one more than two.The acrylic acid tree of use
Fat is the resin with particular molecule functional structure, and its active function groups can occur graft polymerization reaction, have with isocyanates
The crystallinity of PUR is improved to effect, so as to realize fast positioning function.The xylene formaldehyde resin of use is used as efficiently increasing
Stick, participates in reacting isocyanates, improves the initial bond strenght of PUR, so that the function of quick positioning is realized, together
When xylene formaldehyde resin as toughener, be effectively improved pliability, impact resistance and the water-fast ageing-resistant performance of product.
In addition, silicone hybrid isocyanate groups occur moisturecuring cross-linking reaction, the fine and close build macromolecular of obdurability is generated, so that
Obtain final high intensity.
Technical scheme is as follows：A kind of preparation method of the polyurethane hot melt for being capable of achieving quick positioning, prepares
Step is：
A. by 5~20 parts of reactive tackifier, in 1~8 part of addition reactor of hydrogenated bisphenol A meter, in 110 DEG C ,-
0.095MPa is dehydrated 2h, is cooled to 70 DEG C, adds 0.01~0.05 part of catalyst, 10~45 parts of polyisocyanates, with 400~
700 revs/min of rotating speed stirring, reacts 1~3 hour in 70 DEG C~80 DEG C.20~30 parts of silane modifier is added, in 70 DEG C
~80 DEG C are reacted 2~5 hours, and Silante terminated modified performed polymer is obtained, and the skeleton that hydrogenated bisphenol A can assign adhesive is rigidly tied
Structure, improves adhesive strength and shock resistance.
B. by 40~65 parts of PEPA, 15~35 parts of PPG, 10~30 parts of acrylic resin in 120 DEG C ,-
0.095MPa carries out dehydration 2h, after dehydration is finished, 12~35 parts of polyisocyanates is added, with 400~700 revs/min of rotating speed
Stirring, in being reacted 1~3 hour at 100 DEG C~120 DEG C, adds the Silante terminated modified performed polymer 5~25 of this step a preparations
Part, 0.02 part~1 part of antioxidant, 0.001~0.1 part of catalyst, are warmed up to 110 DEG C, are evacuated to below -0.095MPa, take off
Bubble removing 30min, discharging, airtight package is obtained the polyurethane hot melt of quick positioning.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement：
Further, the polyisocyanates in the step a and b is toluene di-isocyanate(TDI)（TDI-80、TDI-100）, two
The ＇ of phenylmethane-4,4-diisocyanate（MDI）, HDI（HDI）, an xylylene diisocyanate（M-
XDI）, polymethine polyphenyl polyisocyanate（PAPI）, triphenylmethane triisocyanate（TTI）, 2,4- toluene diisocyanates
At least one in acid esters tripolymer, HDI trimer, 1,5- naphthalene diisocyanates, hydrogenation TDI, hydrogenation MDI.Preferably Yantai
The commercially available toluene two of the commercially available 4,4' methyl diphenylene diisocyanates MDI of Wan Hua limited companies, Bayer A.G is different
The mixture of one or more in cyanate TDI-80, TDI-100 and HDI trimer Desmodur N3300.
Further, reactive tackifier are xylene formaldehyde resin in the step a.It is preferred that the trade mark is Mitsubishi gas
Trade name " Nikanol " resin of companies market.
It is to contain hydroxyl, ehter bond etc. in xylene formaldehyde resin molecular structure using the beneficial effect of above-mentioned further scheme
Active group, has more than 80% for diformazan benzenyl structure in molecular composition, itself there is good toughness group and water resistance
Can, its active o content 9~12%, hydroxyl value 4.5%.Present invention choosing uses it as tackifier and toughener, participates in isocyanic acid
Ester reacts, and improves the initial bond strenght of PUR, so that the function of quick positioning is realized, while being also effectively improved product
The pliability of product, final adhesive strength, impact resistance and water-fast ageing-resistant performance.
Further, the catalyst in the step a and b is dibutyl tin laurate, stannous octoate, lead octoate, three second
Amine, triethylenediamine, cobalt octoate, iron octoate, zinc naphthenate, tetrabutyl titanate, dimorpholine base Anaesthetie Ether（DMDEE）In
At least one.
Further, in the step a silane modifier be the organosilan Y9669 of Buddhist santonin company, KH550,
One or more in KH560, A189.
Beneficial effect using above-mentioned further scheme is, peculiar in molecular structure using silane hybrid polyurethane technology
Silicone-type group can generate three-dimensional-structure, make polymer react chain extension after in tridimensional network develop, Ke Yiyin
The strand of resistance to lotus for sending out longer, assigns adhesive longer elongation percentage, tearing strength higher, tensile strength and peel strength,
And more preferable adhesive force.
Further, in the step b PPG be molecular weight 1000~4000 Polyoxypropylene diol, poly-
One kind in oxypropylene-oxyethylene dihydroxylic alcohols, PTMG, polycaprolactone glycol, PCDL, it is excellent
Elect one or two the mixture in commercially available PTMG2000, PTMG3000, PPG204, PPG210, PPG220 as.
Further, PEPA is adipic acid and BDO, neopentyl glycol, ethylene glycol, two sweet in the step b
At least one dihydroxylic alcohols in alcohol and 1,6- hexylene glycol is polymerized, and the polyhexamethylene adipate glycol is preferably the Jiangsu rising sun
The commercially available XCP-3000H of river chemical company, its hydroxyl value is 35~39mgKOH/g, and acid number is 0.1~0.8mgKOH/g, described poly-
Adipic acid-BDO esterdiol is preferably the commercially available POL-356T of Qingdao New Yutian Chemical Co., Ltd., and its hydroxyl value is 53
~59mgKOH/g, acid number is 0.1~0.8mgKOH/g.
Beneficial effect using above-mentioned further scheme is that the polyalcohol that the present invention is used has various crystallinity or noncrystalline
Property polyalcohol mixing composition, increase crystallinity polyalcohol amount can improve initial strength, but crystallinity is excessive, glue-line cause
It is close, steam can be hindered to enter, slow down curing rate；The amount for increasing amorphism polyalcohol can extend the open hour, but just
Beginning intensity can be reduced.Therefore need to balance the consumption of various polyalcohols, to obtain good performance.
Further, acrylic resin, DB256, DB66, DB68 that specially Yantai federal corporate is produced in the step b
In one kind.
Beneficial effect using above-mentioned further scheme is that the present invention uses the acrylic resin that Yantai federal corporate is produced
It is the resin of the particular molecule functional structure with unknown concrete structure, its active function groups can be grafted with isocyanates
Polymerisation, effectively improves the crystallinity of PUR, so as to realize fast positioning function.
Further, in the step b antioxidant be in commercially available antioxidant 264, antioxidant 1010, antioxidant 1076 extremely
Few one kind.
Beneficial effect using above-mentioned further scheme is that antioxidant can improve the ageing resistace of adhesive.
When using, heating system is first opened, temperature setting is 100~160 DEG C, uses glue rifle gluing, within the open hour to the greatest extent
Fast pressing, room temperature can reach final strength in 7 days.
The present invention is that the initial bond strenght that polyurethane hot melt in the prior art is present is low, shock resistance in order to solve
Difference, poor water resistance, loss of properties on aging and the slow weakness of curing rate, there is provided a kind of polyurethane for being capable of achieving quick positioning
The preparation method of PUR, belongs to solvent-free environment-protection adhesive industry, obtained polyurethane hot melt can meet plastics and
The compound sticking of various metals base material, greatly improvement is brought to polyurethane adhesive performance.
Polyurethane hot melt prepared by the present invention, with good initial strength, is capable of achieving efficiently quickly positioning function,
And its adhesive strength, pliability, impact resistance, water-fast, ageing-resistant performance and curing rate are all very excellent, than current city
Similar adhesive on face has greatly raising, disclosure satisfy that the rigors in the high-end manufacture field such as mobile phone, communication apparatus.
Specific embodiment
Principle of the invention and feature are described below, example is served only for explaining the present invention, is not intended to limit
Determine the scope of the present invention.
Raw material in following examples is parts by weight；PPG PPG210, PPG PPG220, polyethers
Polyalcohol PPG204 is that the factory of Plant of Tianjin Petrochemical Company three is commercially available；PEPA POL-356T is city of Qingdao New Yutian Chemical Co., Ltd.
Sell, its hydroxyl value is 53~59mgKOH/g, acid number is 0.1~0.8mgKOH/g；PEPA XCP-3000H is Jiangsu Xu Chuan
Chemical company is commercially available, and its hydroxyl value is 35~39mgKOH/g, and acid number is 0.1~0.8mgKOH/g；Reactive tackifier
" Nikanol " resin is Mitsubishi gas companies market；4,4' methyl diphenylene diisocyanates MDI is Yantai Wanhua stock
Part Co., Ltd is commercially available；Toluene di-isocyanate(TDI) TDI 80, TDI-100, Desmodur N3300 are that Bayer A.G is commercially available；
At least one in DB256, DB66, DB68 that acrylic resin is produced by Yantai federal corporate.
Embodiment 1： 1）By 5 parts of reactive plasticizer " Nikanol " resin, 8 parts of addition reactors of hydrogenated bisphenol A meter
In, in 110 DEG C, -0.095MPa dehydration 2h, 70 DEG C are cooled to, add 0.01 part of dibutyl tin laurate, German Baeyer
Desmodur N3300 count 10 parts, are stirred with 400 revs/min of rotating speed, are reacted 3 hours in 70 DEG C.Add silane modifier
Y9669 counts 20 parts, is reacted 5 hours in 70 DEG C, and Silante terminated modified performed polymer is obtained.
2）PEPA XCP-3000H is counted into 65 parts, PPG PPG220 meters 15 parts, acrylic resin DB256
30 parts of meter carries out dehydration 2h in 120 DEG C, -0.095MPa, after dehydration is finished, adds 4,4' methyl diphenylene diisocyanates MDI-
100 35 parts of meters, are stirred with 700 revs/min of rotating speed, in being reacted 1 hour at 120 DEG C, add the silane envelope of this step a preparations
End modified 5 parts of performed polymer, 1.0 parts of antioxidant 264 agent, dimorpholine base Anaesthetie Ether（DMDEE）0.1 part, 110 DEG C are warmed up to, taken out
Vacuum removes bubble 30min to below -0.095MPa, and discharging, airtight package is obtained the polyurethane hot melt of quick positioning.
Embodiment 2： 1）By 20 parts of reactive plasticizer " Nikanol " resin, 1 part of addition reactor of hydrogenated bisphenol A meter
In, in 110 DEG C, -0.095MPa dehydration 2h, 70 DEG C are cooled to, add 0.05 part of stannous octoate, 2,4- toluene di-isocyanate(TDI)s three
45 parts of aggressiveness meter, is stirred with 700 revs/min of rotating speed, is reacted 1 hour in 80 DEG C.Add silane modifier A189 and count 30 parts,
Reacted 2 hours in 80 DEG C, Silante terminated modified performed polymer is obtained.
2）40 parts of PEPA POL-356T meters, PPG PPG204 are counted into 35 parts, acrylic resin DB66 meters
10 parts carry out dehydration 2h in 120 DEG C, -0.095MPa, after dehydration is finished, add 4,4' methyl diphenylene diisocyanates MDI-
100 9 parts of meters, toluene di-isocyanate(TDI) TDI-100 count 3 parts, are stirred with 400 revs/min of rotating speed, small in reaction 3 at 100 DEG C
When, add 25 parts of Silante terminated modified performed polymer, 0.02 part of antioxidant 1010 meter, the triethylenediamine of this step a preparations
0.001 part, 110 DEG C are warmed up to, be evacuated to below -0.095MPa, remove bubble 30min, discharging, airtight package is obtained fast
The polyurethane hot melt of speed positioning.
Embodiment 3：1）By 13 parts of reactive plasticizer " Nikanol " resin, 4 parts of addition reactors of hydrogenated bisphenol A meter
In, in 110 DEG C, -0.095MPa dehydration 2h, 70 DEG C are cooled to, add 0.04 part of dibutyl tin laurate, triphenyl methane three
Isocyanates（TTI）30 parts of meter, is stirred with 550 revs/min of rotating speed, is reacted 2 hours in 75 DEG C.Add silane modifier
KH-550 counts 26 parts, is reacted 3.5 hours in 75 DEG C, and Silante terminated modified performed polymer is obtained.
2）PEPA XCP-3000H is counted 33 parts, PEPA POL-356T counts 20 parts, PPG
25 parts of PPG210 meters, acrylic resin DB68 count 20 parts and carry out dehydration 2h in 120 DEG C, -0.095MPa, after dehydration is finished, add
4,4' methyl diphenylene diisocyanate MDI count 14 parts, and toluene di-isocyanate(TDI) TDI 100 counts 5 parts, with 550 revs/min
Rotating speed is stirred, and in being reacted 2 hours at 110 DEG C, adds 15 parts of Silante terminated modified performed polymer, the antioxidant of this step a preparations
1076 meter 0.05 part, dimorpholine base Anaesthetie Ethers（DMDEE）0.04 part, 0.01 part of triethylenediamine is warmed up to 110 DEG C, takes out
Vacuum removes bubble 30min to below -0.095MPa, and discharging, airtight package is obtained the polyurethane hot melt of quick positioning.
When PUR obtained in above example 1 to embodiment 3 is used, heating system is first opened, temperature setting is 70~
120 DEG C, use glue rifle gluing.Initial strength by after 5min after applying glue test, final strength by after applying glue place 7 days after test.One
As cold curing can reach maximum intensity within 7 days.
Comparative example：The formula and processing technology of traditional moisture-curable PUR glue is as follows：By PPG PPG210 meters
20 parts, PEPA POL-356T is counted in 45 parts of addition reactors, is stirred with 500 revs/min of rotating speed, in true at 120 DEG C
Sky dehydration 2 hours, vacuum is maintained at -0.09MPa.Then 80 DEG C are cooled to, side stirring is all over 4,4' of addition diphenyl methanes two
Isocyanates MDI counts 15 parts, then slow to heat up, and control temperature is at 80 DEG C, while nitrogen charging gas shielded, reacts 2.5 hours.Treat
After sampling analysis NCO% contents reach design load, 15 parts of terpenes tackifying resin, catalyst dibutyltin dilaurylate 0.1 are added
0.4 part of part and triethylene diamine.Bubble-free is evacuated under conditions of being 110 DEG C in temperature to occur, then discharge, closed bag
Dress, places stand-by.This glue first opens heating system when technique is used, and temperature setting is 100~130 DEG C, uses glue rifle gluing,
Gluing process ensures to be completed within the open hour, then is carried out in accordance with regulations test.Initial strength is tested by after gluing after placement 5min,
Final strength by after gluing place 7 days after test.General cold curing can reach maximum intensity in 7 days.
Polyurethane hot melt prepared by polyurethane hot melt obtained in above-described embodiment 1~3 and comparative example is pressed into glue
Stick testing standard carries out initial shear strength, initial bonding strength, tensile strength, elongation at break, final shear strength, most
Whole peel strength, thermal shock, salt spray test and double 85 aging rear tests, data result is as shown in table 1, table 2, table 3.Wherein
The ability of quick positioning is characterized with the numerical value of the gluing initial shear strength of 5 minutes and initial bonding strength, this is the present invention
Core consider index.In addition, the stretching of pliability of the present invention, adhesive strength, shock resistance respectively by table 2 is strong
Degree, elongation at break, final shear strength, final peel strength, the numerical value of thermal shock are characterized；Salt spray resistance and heat-resisting
Ageing properties are characterized by the numerical value of the detection project of table 3.
The embodiment of table 1 and comparative example's initial strength（Quick stationkeeping ability）Test comparison
The embodiment of table 2 is compareed with comparative example's measuring mechanical property
The embodiment of table 3 and the water-fast ageing-resistant performance test comparison of comparative example
Embodiment 1~3 is can be seen that from above-mentioned table 1-3 to show with the performance test analysis of comparative example, present invention system
Standby polyurethane hot melt has efficiently quickly positioning performance.Meanwhile, the glue has good adhesive strength and excellent soft
Toughness, cold-and-heat resistent impact and salt spray resistance ageing-resistant performance.So, it is provided by the present invention with polyurethane hot melt, can
Meet the manufacture such as mobile phone, communication apparatus field needs quickly positioning, the strict demand of high-adhesive-strength, life can be greatly enhanced
Efficiency is produced, manufacturing cost is reduced, the core competitiveness to lifting domestic polyurethane hot melt has important practical significance.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (7)
1. a kind of preparation method of the polyurethane hot melt for being capable of achieving quick positioning, it is characterised in that preparation process is：
A. by the reactive weight portion of tackifier xylene formaldehyde resin 5~20, the weight portion of hydrogenated bisphenol A meter 1~8 adds reaction
In kettle, in 110 DEG C, -0.095MPa dehydration 2h, 70 DEG C are cooled to, add the weight portion of catalyst 0.01~0.05, polyisocyanates
10~45 weight portions, are stirred with 400~700 revs/min of rotating speed, are reacted 1~3 hour in 70 DEG C~80 DEG C, add silane
The weight portion of modifying agent 20~30, reacts 2~5 hours in 70 DEG C~80 DEG C, and Silante terminated modified performed polymer is obtained；
B. by the weight portion of PEPA 40~65, the weight portion of PPG 15~35, the weight portion of acrylic resin 10~30
Dehydration 2h is carried out in 120 DEG C, -0.095MPa, after dehydration is finished, the weight portion of polyisocyanates 12~35 is added, with 400~700
Rev/min rotating speed stirring, in being reacted 1~3 hour at 100 DEG C~120 DEG C, add the Silante terminated modified of step a preparations
The weight portion of performed polymer 5~25, weight portion~1.0 weight portion of antioxidant 0.02, the weight portion of catalyst 0.001~0.1, are warmed up to
110 DEG C, it is evacuated to below -0.095MPa, removes bubble 30min, discharging, airtight package is obtained the polyurethane of quick positioning
PUR；One kind in DB256, DB66, DB68 that described acrylic resin is produced by Yantai federal corporate.
2. the preparation method of the polyurethane hot melt for being capable of achieving quick positioning according to claim 1, it is characterised in that institute
Catalyst in step a and b is stated for dibutyl tin laurate, stannous octoate, lead octoate, triethylamine, triethylenediamine, pungent
One kind in sour cobalt, zinc naphthenate, tetrabutyl titanate, dimorpholine base Anaesthetie Ether.
3. the preparation method of the polyurethane hot melt for being capable of achieving quick positioning according to claim 1, it is characterised in that institute
It is toluene di-isocyanate(TDI), the ＇ of diphenyl methane-4,4-diisocyanate, hexamethylene two to state the polyisocyanates in step a and b
Isocyanates, 1,5- naphthalene diisocyanates, an xylylene diisocyanate, polymethine polyphenyl polyisocyanate, 2,4-
One kind in toluene diisocyanate trimer, HDI tripolymer, hydrogenation TDI, hydrogenation MDI.
4. the preparation method of the polyurethane hot melt for being capable of achieving quick positioning according to claim 1, it is characterised in that institute
Silane modifier is one or more in organosilan Y9669, KH550, KH560, A189 in stating step a.
5. the preparation method of the polyurethane hot melt for being capable of achieving quick positioning according to claim 1, it is characterised in that institute
PPG is Polyoxypropylene diol, PPOX-ethylene oxide of the molecular weight 1000~4000 in stating step b
One kind in dihydroxylic alcohols, PTMG, polycaprolactone glycol.
6. the preparation method of the polyurethane hot melt for being capable of achieving quick positioning according to claim 1, it is characterised in that institute
PEPA is in adipic acid and 1,4- butanediols, neopentyl glycol, ethylene glycol, diethylene glycol (DEG) and 1,6-HD in stating step b
At least one dihydroxylic alcohols be polymerized.
7. the preparation method of the polyurethane hot melt for being capable of achieving quick positioning according to claim 1, it is characterised in that institute
It is at least one in commercially available antioxidant 264, antioxidant 1010, antioxidant 1076 to state antioxidant in step b.
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| CN115746776A (en) * | 2022-11-24 | 2023-03-07 | 山东凯恩新材料科技有限公司 | UV/moisture dual-curing polyurethane hot melt adhesive and preparation method and application thereof |
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