CN105694803A - Hot-melt pressure-sensitive adhesive and preparation technology thereof - Google Patents
Hot-melt pressure-sensitive adhesive and preparation technology thereof Download PDFInfo
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- CN105694803A CN105694803A CN201610129066.XA CN201610129066A CN105694803A CN 105694803 A CN105694803 A CN 105694803A CN 201610129066 A CN201610129066 A CN 201610129066A CN 105694803 A CN105694803 A CN 105694803A
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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
- C09J193/00—Adhesives based on natural resins; Adhesives based on derivatives thereof
- C09J193/04—Rosin
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention belongs to the technical field of synthetic adhesives and particularly relates to a hot-melt pressure-sensitive adhesive and a preparation technology thereof. The hot-melt pressure-sensitive adhesive is prepared from raw materials in percentage by mass as follows: 1%-5% of a TPU (thermoplastic polyurethane) elastomer, 10%-15% of hydrogenated SEBS (styrene-ethylene-butadiene styrene), 45%-55% of tackifying resin, 25%-35% of a plasticizer, 0-1% of solid filler and 0-0.5% of an antioxidant. The TPU elastomer is added and blended with SEBS for modification, a framework structure is formed, components such as the tackifying resin, the plasticizer, the solid filler, the antioxidant and the like are added, the problem of damp-heat aging of the adhesive due to seasonal change is solved, the preparation technology of the adhesive is explored, the production cycle is shortened, and energy consumption is reduced.
Description
Technical field
The invention belongs to synthetic adhesive technical field, be specifically related to a kind of hot-fusible pressure-sensitive adhesive and preparation technology thereof。
Background technology
Hot-fusible pressure-sensitive adhesive is the class adhesive having PUR and two kinds of characteristics of pressure sensitive adhesive concurrently, with thermoplastic elastomer (TPE) for material of main part, adds the binding agent that viscosifier, plasticizer, antioxidant and other additive are melted, has PUR and pressure sensitive adhesive double grading concurrently；This kind of adhesive is coated with in the molten state, the after-applied slight finger pressure of hardening by cooling just can quick-binding, it can be stripped with comparalive ease simultaneously, does not pollute bonded surface, mainly the field such as application and packaging, label, hygienic article, medical supplies, extraordinary bonding。But, hot-fusible pressure-sensitive adhesive is being processed and in placement process because colloidal materials is aging, causing inharmonious, the problem such as glue surface is brittle in various degree, there is production accident risk in its Process of Applying Glue, this phenomenon is affected particularly evident by summer high temperature high humidity, winter low temperature dry climate。
Summary of the invention
For the problems referred to above, the present invention proposes a kind of hot-fusible pressure-sensitive adhesive and preparation technology thereof, the present invention is by adding Polyurethane Thermoplastic Elastomer (TPU), with SEBS blending and modifying, form framing structure, and add the components such as tackifying resin, plasticizer, solid packing, antioxidant, solve the hydrothermal aging problem that such adhesive causes because of seasonal variety, and its preparation technology is groped, shorten the production cycle, reduce energy consumption。
A kind of hot-fusible pressure-sensitive adhesive of the present invention, by percentage to the quality, Polyurethane Thermoplastic Elastomer 1-5%, hydrogenated styrene-butadiene block copolymer 10-15%, tackifying resin 45-55%, plasticizer 25-35%, solid packing 0-1%, antioxidant 0-0.5%。
Polyurethane Thermoplastic Elastomer in the present invention selects DesmopanWDP85786A Polyurethane Thermoplastic Elastomer, and its intensity is relatively low, and ductility is good, and ultraviolet radiation resisting performance highlights, and additionally also has extra high elasticity and low temperature flexibility。Its content accounts for the 1%-5% of hot-fusible pressure-sensitive adhesive gross mass。The too small then ageing resistace of content is improved inconspicuous, excessive, weakens main body " skeleton " effect of block copolymer。Polyurethane Thermoplastic Elastomer content determines the heat resistance performance of PUR to a great extent, chooses the excellent thermoplastic polyurethane of ageing resistace as blend components, and blended with SEBS, the compatibility is good, is suitable for fabric coating。The substrate surface being applied can with in TPU-NCO group effect forms firmly ammonia ester bond and urea key, fiber forms hydrogen bond with the interphase interaction of the polar bond in PUR simultaneously, and in PUR between the easy infiltrated fiber of macromolecular material, bonding can be promoted。
Hydrogenated styrene-butadiene block copolymer selects KratonG1650, because S block content 30% in KratonG1650SEBS elastomer, content is moderate。Test finds, elastomer S block content height then cohesiveness is higher, and S block content is low toward in ancient times viscous relatively good。Test data shows, the mass content of elastomer often increases by 1%, melt viscosity rising 500cps。Relative to YH-791SBS, the KratonG1650SEBS of identical S block content be hydrogenation after product, oxidation resistance is strong。Its content accounts between the 15%-20% of hot-fusible pressure-sensitive adhesive gross mass。Content is excessive, and the cohesiveness that can make hot-fusible pressure-sensitive adhesive is excessive, thus reducing the wettability to base material, content is too small, then the cohesiveness of PUR is relatively low so that hot-fusible pressure-sensitive adhesive is susceptible to low-temperature creep。This component plays " skeleton " effect in hot-fusible pressure-sensitive adhesive system。
Tackifying resin selects Colophonium pentaerythritol resin, it is preferable that the KA100L rosin resin that oxidation resistance is moderate, its content accounts for the 45%-55% of hot-fusible pressure-sensitive adhesive gross mass。Content is excessive, can reduce the cohesiveness of PUR, and content is too small, then the cohesiveness making hot-fusible pressure-sensitive adhesive because block copolymer content is high is excessive, thus reducing the wettability to base material。For hydrogenated rosin resin, the antioxygenic property of KA100L modified rosin resin is more weak, but hydrogenated rosin resin price is high, economically considers, chooses the KA100L modified rosin resin tackifying resin as body series。The present invention adopts the viscosity that can improve PUR and the wellability of tackifying resin, improves surface contact effect and specific adhesion performance, obtains the balance between desirable viscosity, cohesive strength and boundary strength。
Plasticizer of the present invention is selected from having 4010 naphthenic oils to styrene-butadiene block copolymer more excellent solubility energy or 4006 naphthenic oils or white oil, and its content accounts for the 22%-32% of hot-fusible pressure-sensitive adhesive gross mass。Plasticizer is too high, and PUR decrease in strength is obvious；Plasticizer loading is too low, and the plasticity of PUR is poor, and hardness is high, glue spraying difficulty。Its mechanism of action is that plasticizer molecule is inserted between polymer molecular chain, weakens the active force of molecule interchain, adds the activeness of strand, reduces the degree of crystallinity of polymer, and pliability increases, and improves the cohesive of various base materials in contact adhesive。
Solid packing of the present invention selects 1250 order lightweight CaCO3Granule。Its content accounts for the 0%--1% of hot-fusible pressure-sensitive adhesive gross mass。Fine particle calcium carbonate adjuvant content increase can significantly reduce PUR intermolecular cohesion, and namely melt viscosity fashionable declines to a great extent, reduce applying glue difficulty to a certain extent, reduce production cost there being fine particle calcium carbonate adjuvant to add。Its application is restricted, is only applicable to the non-spraying techniques such as persistency bonding and blade coating。
Antioxidant of the present invention is selected from antioxidant 1010 or antioxidant 268, it is preferable that have the antioxidant 1010 of the more excellent antioxygenic property for macromolecular material。Its content accounts for the 0%-0.5% of hot-fusible pressure-sensitive adhesive gross mass。Antioxidant content is low, and antioxidant effect is poor, and too high levels then affects the cohesiveness of PUR, cost increase。
Inventor is when the mass ratio that overtesting finds maintenance Polyurethane Thermoplastic Elastomer and hydrogenated styrene-butadiene block copolymer is 90:10-75:25, it is preferable that 13:3, hot-fusible pressure-sensitive adhesive has suitable softening point and melt viscosity。Because the hardness of TPU is relatively big, when TPU too high levels, the hardness of hot-fusible pressure-sensitive adhesive and softening point can be made to enlarge markedly。Because in TPU-NCO group has and forms firmly ammonia ester bond and urea key with substrate surface effect, simultaneously fiber and the polar bond in PUR glue ask that interaction forms hydrogen bond, so TPU content is too low, the effect increasing cohesive force is inconspicuous。
Hot-fusible pressure-sensitive adhesive of the present invention, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 3%, hydrogenated styrene-butadiene block copolymer 13%, tackifying resin 50%, plasticizer 33.9%, during antioxidant 0.1%, it is thus achieved that the performance of hot-fusible pressure-sensitive adhesive best。
Hot-fusible pressure-sensitive adhesive preparation technology of the present invention, it concretely comprises the following steps:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 105-145 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 2-3h is to whole material melts, it is warming up to 135-160 DEG C, adding other raw materials remaining, insulated and stirred 2-3h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
In order to avoid colloid is aging, the present invention adopts and is initially charged hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer, the technique adding tackifying resin。Because the resistance to elevated temperatures of tackifying resin is poor, and hydrogenated styrene-butadiene block copolymer and the melted of Polyurethane Thermoplastic Elastomer need again the long period, if being initially charged tackifying resin to add hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer, the production time can be caused long, and then it is aging to produce colloid, and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer not easily with melted after tackifying resin blended, in turn result in mixing of materials uneven, make the molecular chain length in PUR impacted, thus affecting colloid cohesiveness。
In production process, in order to hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer have swelling rate conveniently and avoid it aging, it is necessary to plasticizer is heated to 105-145 DEG C。
After styrene-butadiene block copolymer to be hydrogenated and Polyurethane Thermoplastic Elastomer are all molten in plasticizer, owing to the later stage needs to add relatively large tackifying resin, in order to avoid reactor temperature decline situation occurs, it is necessary to first whole reaction system is warming up to 135-160 DEG C。Temperature is too low so that reactor temperature is too low, has influence on the blended effect in subsequent production process, it is possible to there will be hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer because of low temperature can not consoluet situation；Temperature is higher than 160 DEG C, tackifying resin and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer aging comparatively obvious, and material color substantially deepens。
Producing colloidal silica in order to effectively prevent melting heat melten gel in reactor with contacting of air, reaction of the present invention carries out under vacuumized conditions, and vacuum degree control is at 0.5-0.9 atmospheric pressure。Lower than 0.5 atmospheric pressure, the bubble produced in Blending Processes is more, and degassing time is longer, affects production efficiency；Higher higher than 0.9 atmospheric pressure then energy consumption。
Compared with prior art, the present invention has changed the addition sequence of material under vacuumized conditions, reduces reaction temperature, effectively prevent the aging of colloidal materials, and eliminate the oxidation of environmental air to the full extent, reduce energy consumption, improve final products quality。
In sum, the present invention is by adding thermoplastic polyurethane (TPU), with SEBS blending and modifying, formation framing structure, and add the components such as tackifying resin, plasticizer, solid packing, antioxidant, solve the hydrothermal aging problem that such hot-fusible pressure-sensitive adhesive causes because of seasonal variety；Improve product quality by improving production and processing technology, reduce energy consumption。
Detailed description of the invention
Embodiment 1
A kind of hot-fusible pressure-sensitive adhesive, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 3%, hydrogenated styrene-butadiene block copolymer 13%, tackifying resin 50%, plasticizer 33.9%, antioxidant 0.1%。
Described tackifying resin is selected from KA100L rosin resin。
Described plasticizer fat is selected from 4010 naphthenic oils。
Described antioxidant fat is selected from antioxidant 1010。
Its concrete preparation process is:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 105 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 3h is to whole material melts, it is warming up to 135 DEG C, adding other raw materials remaining, insulated and stirred 3h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
Vacuum in step (2) is 0.9 atmospheric pressure。
Embodiment 2
A kind of hot-fusible pressure-sensitive adhesive, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 1%, hydrogenated styrene-butadiene block copolymer 10%, tackifying resin 55%, plasticizer 33.9%, antioxidant 0.1%。
Described tackifying resin is selected from KA100L rosin resin。
Described plasticizer fat is selected from 4006 naphthenic oils。
Described antioxidant fat is selected from antioxidant 268。
Its concrete preparation process is:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 145 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 2 is to whole material melts, it is warming up to 160 DEG C, adding other raw materials remaining, insulated and stirred 2h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
Vacuum in step (2) is 0.5 atmospheric pressure。
Embodiment 3
A kind of hot-fusible pressure-sensitive adhesive, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 3%, hydrogenated styrene-butadiene block copolymer 13%, tackifying resin 55%, plasticizer 27.8%, solid packing 1%, antioxidant 0.2%。
Described tackifying resin is selected from KA100L rosin resin。
Described plasticizer fat is selected from white oil。
Described antioxidant fat is selected from antioxidant 268。
Its concrete preparation process is:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 125 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 2.5h is to whole material melts, it is warming up to 148 DEG C, adding other raw materials remaining, insulated and stirred 3h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
Vacuum in step (2) is 0.7 atmospheric pressure。
Embodiment 4
A kind of hot-fusible pressure-sensitive adhesive, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 4%, hydrogenated styrene-butadiene block copolymer 14%, tackifying resin 48%, plasticizer 33.2%, solid packing 0.5%, antioxidant 0.3%。
Described tackifying resin is selected from KA100L rosin resin。
Described plasticizer fat is selected from 4010 naphthenic oils。
Described antioxidant fat is selected from antioxidant 1010。
Its concrete preparation process is:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 115 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 2h is to whole material melts, it is warming up to 140 DEG C, adding other raw materials remaining, insulated and stirred 3h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
Vacuum in step (2) is 0.6 atmospheric pressure。
Embodiment 5
A kind of hot-fusible pressure-sensitive adhesive, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 5%, hydrogenated styrene-butadiene block copolymer 15%, tackifying resin 53%, plasticizer 25.8%, solid packing 0.7%, antioxidant 0.5%。
Described tackifying resin is selected from KA100L rosin resin。
Described plasticizer fat is selected from 4010 naphthenic oils。
Described antioxidant fat is selected from antioxidant 1010。
Its concrete preparation process is:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 135 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 2.5h is to whole material melts, it is warming up to 155 DEG C, adding other raw materials remaining, insulated and stirred 2h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
Vacuum in step (2) is 0.8 atmospheric pressure。
Embodiment 6
A kind of hot-fusible pressure-sensitive adhesive, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 3%, hydrogenated styrene-butadiene block copolymer 12%, tackifying resin 50%, plasticizer 34.6%, solid packing 0.2%, antioxidant 0.2%。
Described tackifying resin is selected from KA100L rosin resin。
Described plasticizer fat is selected from 4010 naphthenic oils。
Described antioxidant fat is selected from antioxidant 1010。
Its concrete preparation process is:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 110 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 3h is to whole material melts, it is warming up to 130 DEG C, adding other raw materials remaining, insulated and stirred 2.5h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
Vacuum in step (2) is 0.9 atmospheric pressure。
Embodiment 7
A kind of hot-fusible pressure-sensitive adhesive, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 2.4%, hydrogenated styrene-butadiene block copolymer 13.6%, tackifying resin 50%, plasticizer 32.5%, solid packing 1%, antioxidant 0.5%。
Described tackifying resin is selected from KA100L rosin resin。
Described plasticizer fat is selected from 4010 naphthenic oils。
Described antioxidant fat is selected from antioxidant 1010。
Its concrete preparation process is:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 130 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 2.5h is to whole material melts, it is warming up to 150 DEG C, adding other raw materials remaining, insulated and stirred 3h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
Vacuum in step (2) is 0.5 atmospheric pressure。
Embodiment 8
A kind of hot-fusible pressure-sensitive adhesive, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 1.5%, hydrogenated styrene-butadiene block copolymer 13.5%, tackifying resin 55%, plasticizer 29.5%, antioxidant 0.5%。
Described tackifying resin is selected from KA100L rosin resin。
Described plasticizer fat is selected from 4006 naphthenic oils。
Described antioxidant fat is selected from antioxidant 1010。
Its concrete preparation process is:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 120 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 2h is to whole material melts, it is warming up to 145 DEG C, adding other raw materials remaining, insulated and stirred 3h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
Vacuum in step (2) is 0.5 atmospheric pressure。
Comparative example 1
A kind of hot-fusible pressure-sensitive adhesive, by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 3%, hydrogenated styrene-butadiene block copolymer 13%, tackifying resin 50%, plasticizer 33.9%, antioxidant 0.1%。
Described tackifying resin is selected from C-100RC5 hydrogenated petroleum resin。
Described plasticizer fat is selected from 4010 naphthenic oils。
Described antioxidant fat is selected from antioxidant 1010。
Its concrete preparation process is:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 105 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 3h is to whole material melts, it is warming up to 135 DEG C, adding other raw materials remaining, insulated and stirred 3h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
Vacuum in step (2) is 0.9 atmospheric pressure。
Table 1 PUR of the present invention and prior art PUR performance comparison
As can be seen from Table 1: Polyurethane Thermoplastic Elastomer and hydrogenated styrene-butadiene block copolymer play skeleton function, the softening point adhesive property of PUR is affected bigger。Polyurethane Thermoplastic Elastomer is bigger to the contribution of PUR ageing resistance so that PUR remains to keep higher peel strength after long-time placement is aging。Tackifying resin makes PUR possess good wettability and adhesion strength。Therefore, embodiment 1,3,4,5,6 all maintains prominent ageing resistace。Embodiment 2 is because operating the factor such as temperature, pressure in antioxidant, processing technique, adhesive property is affected, but prescription design makes it remain to be maintained with respect to the good ageing resistace of commercially available PUR。The design of embodiment 7 prescription makes it have relatively low cost, although PUR is impacted with the adhesion strength of base material, but still maintains higher ageing resistace。Embodiment 8, because tackifying resin content is higher, therefore maintains higher adhesive property, softening point lower slightly but still better than commercially available PUR product。Comparative example 1 can keep good antioxygenic property, but its relative price is higher, is affected that its peel strength is lower slightly, softening point is higher by tackifying resin type simultaneously, and softening point height can cause the energy consumption in PUR application to increase。The peel strength of commercially available PUR can keep basic cementitiousness, but extend standing time and be then likely to occur inharmonious phenomenon。Being affected by hydrothermal aging in its placement process, the fracture of molecule segment generating portion causes softening point relatively low, thus easily there is creep, is not easy to storage, transport。
Claims (9)
1. a hot-fusible pressure-sensitive adhesive, it is characterised in that: by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 1-5%, hydrogenated styrene-butadiene block copolymer 10-15%, tackifying resin 45-55%, plasticizer 25-35%, solid packing 0-1%, antioxidant 0-0.5%。
2. a kind of hot-fusible pressure-sensitive adhesive according to claim 1, it is characterised in that: the mass ratio of described hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is 90:10-75:25。
3. a kind of hot-fusible pressure-sensitive adhesive according to claim 1, it is characterised in that: the mass ratio of described hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is 13:3。
4. a kind of hot-fusible pressure-sensitive adhesive according to claim 1, it is characterised in that: by percentage to the quality, its raw material consists of: Polyurethane Thermoplastic Elastomer 3%, hydrogenated styrene-butadiene block copolymer 13%, tackifying resin 50%, plasticizer 33.9%, antioxidant 0.1%。
5. a kind of hot-fusible pressure-sensitive adhesive according to claim 1, it is characterised in that: described tackifying resin is selected from Colophonium pentaerythritol resin。
6. a kind of hot-fusible pressure-sensitive adhesive according to claim 1, it is characterised in that: described plasticizer fat is selected from 4010 naphthenic oils or 4006 naphthenic oils or white oil。
7. a kind of hot-fusible pressure-sensitive adhesive according to claim 1, it is characterised in that: described antioxidant fat is selected from antioxidant 1010 or antioxidant 268。
8. a hot-fusible pressure-sensitive adhesive preparation technology, it is characterised in that: it concretely comprises the following steps:
(1) each raw material is weighed in proportion, standby；
(2) under vacuumized conditions, plasticizer is heated to 105-145 DEG C, antioxidant and hydrogenated styrene-butadiene block copolymer and Polyurethane Thermoplastic Elastomer is added under stirring state, insulated and stirred 2-3h is to whole material melts, it is warming up to 135-160 DEG C, adding other raw materials remaining, insulated and stirred 2-3h is to transparent homogeneous thick liquid, and after constant temperature is degassed, blocks of solid is made in cooling。
9. a kind of hot-fusible pressure-sensitive adhesive preparation technology according to claim 8, it is characterised in that: the vacuum in step (2) is 0.5-0.9 atmospheric pressure。
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| CN113752663A (en) * | 2021-09-30 | 2021-12-07 | 江西若邦科技股份有限公司 | Upper cover tape |
| CN113858743A (en) * | 2021-09-30 | 2021-12-31 | 江西若邦科技股份有限公司 | SMD heat-seal type upper cover tape |
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| CN114350291B (en) * | 2022-01-07 | 2022-12-23 | 广州鹿山新材料股份有限公司 | Water-resistant sweat-resistant hot-melt pressure-sensitive adhesive and preparation method and application thereof |
| WO2023130609A1 (en) * | 2022-01-07 | 2023-07-13 | 广州鹿山新材料股份有限公司 | Water-resistant and sweat-resistant hot-melt pressure-sensitive adhesive, and preparation method therefor and use thereof |
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