CN1084779C - Pressure-sensitive adhesive - Google Patents

Abstract

The present invention relates to pressure-sensitive adhesive compositions. The compositions are a blend of about 5 to 95 weight percent of an acrylic pressure-sensitive adhesive and about 5 to 95 weight percent of a thermoplastic elastomeric copolymer. The compositions have a morphology comprising at least two distinc domains, a first domain being substantially continuous in nature and said second domain being fibrillose to schistose in nature parallel to a major surface of the adhesive composition within said first domain. The invention further provides pressure-sensitive adhesive tapes and processes for preparing the compositions and tapes.

Description

Pressure sensitive adhesive and preparation method thereof and by its self adhesive tape that makes

Technical field

The present invention relates to contact adhesive composition, the contact adhesive composition that forms by at least two kinds of polymer materialss (wherein at least a is pressure sensitive adhesive) particularly, and make this pressure sensitive adhesive and contain the method for the goods of pressure sensitive adhesive component.

Background of invention

For more than half a century, pressure-sensitive adhesive tape once was used for various marks, fixed, protected, sealed and covered purposes.Pressure-sensitive adhesive tape comprises backing (or substrate) and pressure sensitive adhesive.Pressure sensitive adhesive is to point applied pressure with regard to cohesible material with being no more than, and it has powerful and permanent viscosity.Except that finger pressure, pressure sensitive adhesive need not activation, just can produce strong bounding force, and can peel off from smooth surface, does not leave a trace.

Some early stage tackiness agent (this product is called surgical adhesive) that uses is not a pressure sensitive adhesive in medical field.In fact, they are with tackify and mix many zinc oxide and make it become the natural rubber crude mixture of white with wood rosin (wood resin) derivative and turps plasticising.These band-type product once played them, but when real pressure sensitive adhesive occurring, they are just replaced.

In medical field, pressure-sensitive adhesive tape is used for the many different purposes of hospital and healthcare field, but mainly plays one of two kinds of functions.They are used for some thing is pulled in suitable place, limit it and move (as various dull and stereotyped purposes), or be used for some thing is remained on suitable place (as some wound dressing).Importantly pressure-sensitive adhesive tape and skin-compatible in each function, not skin irritation and with the skin good bonding, do not make skin injury when peeling off.

Similarly, early stage insulating tape also is a black friction tape, rather than pressure-sensitive adhesive tape.This tackiness agent is very soft, ftractures easily during expansion.After having developed real pressure sensitive adhesive, they are also replaced.Recent insulating tape comprises the pressure sensitive adhesive that is coated on plasticized polyvinyl chloride backing or polyethylene or the rubber film backing.Insulating tape is used for insulation, fixes, reinforces and the protection electric wire.Other purposes comprises matrix (matrix), the electric wire in the identify circuit that impregnating varnish is provided and protect wire terminations in making circuit boards.For insulating tape, importantly insulating tape can stretch, and satisfies the uninflammability requirement.

The strap that packing business need be used for closed packaging in a large number, protect label, makes the packing material sealed damp-proof and tie up loose components and so on purposes.Strap is subject to successive and shears and low-angle peeling force.In general, if the cohesive strength of tackiness agent is lower, it lost efficacy in shearing easily; If the firmness that increases tackiness agent to improve its anti-shearing, then can cause viscosity to reduce and can not be bonding.

Pressure sensitive adhesive needs viscosity and elastic fine balance, and this can cause binding property, cohesion, retractility and elastic quadruple balance.Pressure sensitive adhesive generally comprises elastomerics with inherent viscosity or with the elastomerics or the thermoplastic elastomerics of tackifying resin tackify.They can be coated with after adding solvent or making water-based emulsion liquid, are easy to be applied to selected suprabasil degree so that the viscosity of material is reduced to.

Most pressure sensitive adhesive comprise the tackify line style of synthetic rubber, styrene-butadiene copolymer, styrene-ethylene-butylene copolymer and styrene-isoprene multipolymer of natural rubber, isoprene-isobutylene rubber of tackify and so on and so on, radially, the segmented copolymer of star, branching and taper (tapered); Polyvinyl ether, acrylic resin (acrylic resin that particularly has chain alkyl); Poly-alpha-olefin and polysiloxane.

In general, when improving the performance of pressure sensitive adhesive, require them to mix or have some identical segments or group, so that can on molecular level, form homogeneous mixture with pressure sensitive adhesive is molten with additive.Once pressure sensitive adhesive was carried out modification, and attempted to expand its application to new scope.Once the thermoplastic and high-elastic with tackify was dissolved in the acrylic monomer, was cured then.Also the thermoplastic and high-elastic with tackify joins in the polymeric acrylic psa solution, and wherein every kind of component contains a common fragment, so that produce consistency.General purpose is for elastomeric high-shear performance is combined with the high viscosity of acrylic resin.Continuing to seek further improvement and better properties balance at present.

The general introduction of invention

The invention provides a kind of contact adhesive composition, it is the blend composition of at least a thermoplastic elastic material of a kind of at least a acrylic psa of about 5-95% weight and about 5-95% weight.Described composition has a kind of form that comprises two kinds of different zones at least, the first area has basic successive character, and second area has fibrous extremely flaky character, and described fiber or sheet are arranged in described first area and parallel with the major surfaces of binder composition.The thermoplastic elastic material also can contain tackifying resin or softening agent, and it also can be a tackiness agent in this case.

The present invention also provides a kind of method for preparing contact adhesive composition, and it comprises the steps:

(1) at least a thermoplastic elastic material of at least a acrylic psa of the about 5-95% weight of melting mixing and about 5-95% weight,

(2) (a) described melt-mixed material is shaped, or

(b) described melt-mixed material is shaped and stretches it,

To form a kind of contact adhesive composition, described contact adhesive composition has the form that comprises two kinds of different zones at least, the first area has basic successive character, and second area has fibrous extremely flaky character, described fiber or sheet be arranged in that described first area parallels with the major surfaces of binder composition and

(3) make described composition cools.

The present invention also provides a kind of pressure-sensitive adhesive tape that comprises substrate and contact adhesive composition, and described contact adhesive composition is the blend composition of at least a thermoplastic elastic material of a kind of at least a acrylic psa of about 5-95% weight and about 5-95% weight.Described composition has a kind of form that comprises two kinds of different zones at least, the first area has basic successive character, and that second area has is fibrous to flaky character, and described fiber or sheet are arranged in described first area and parallel with binder composition major surfaces on the basal surface.

The present invention also provides a kind of insulation pressure-sensitive adhesive tape, it comprises substrate and suprabasil contact adhesive composition, and described contact adhesive composition is the blend composition of at least a thermoplastic elastic material of a kind of at least a acrylic psa of about 5-95% weight and about 5-95% weight.Described composition has a kind of form that comprises two kinds of different zones at least, the first area has basic successive character, and second area has fibrous extremely flaky character, and described fiber or sheet are arranged in described first area and parallel with the binder composition major surfaces.Described substrate better is polyvinyl chloride film or ethane-acetic acid ethyenyl ester and film that ethylene-propylene-the elastoprene blend composition is made.

The present invention also provides the method for preparing pressure-sensitive adhesive tape, and it comprises the steps:

(1) at least a thermoplastic elastic material of at least a acrylic psa of the about 5-95% weight of melting mixing and about 5-95% weight,

(2) (a) described melt-mixed material is shaped, or

(b) make described melt-mixed material moulding and stretch it,

Described blend composition forms a kind of binder composition, described binder composition is extruded onto the surface of substrate, form pressure-sensitive adhesive tape, described tackiness agent has the form that comprises two kinds of different zones at least, the first area has basic successive character, and second area is in described first area, on tackiness agent shaping direction, have fibrous to flaky character and

(3) make described adhesive cools.

The present invention also provides the method for preparing pressure-sensitive adhesive tape, and it comprises the steps:

(1) at least a thermoplastic elastic material of at least a acrylic psa of the about 5-95% weight of melting mixing and about 5-95% weight,

(2) (a) described melt-mixed material is shaped, or

(b) described melt-mixed material is shaped and stretches it, with form contact adhesive composition and

(c) make film forming fluoropolymer resin and described binder composition co-extrusion,

Described tackiness agent has the form that comprises two kinds of different zones at least, and the first area has basic successive character, and second area is in described first area, tackiness agent form have on the direction fibrous to flaky character and

(3) make the cooling of described composition and described fluoropolymer resin.

The present invention also provides a kind of pressure-sensitive adhesive tape of dual coating, on the first surface of substrate, scribble a kind of pressure sensitive adhesive, described pressure sensitive adhesive contains the blend composition of at least a thermoplastic elastic material of at least a acrylic psa of the 5-95% weight of having an appointment and about 5-95% weight, described composition has a kind of form that comprises two kinds of different zones at least, the first area has basic successive character, and second area has fibrous extremely flaky character, and described fiber or sheet are arranged in described first area and parallel with the major surfaces of binder composition; Scribble on another surface of substrate with first surface on identical or different pressure sensitive adhesive.

The present invention also provides a kind of method for preparing double-sided pressure-sensitive adhesive tape, and it comprises the steps:

(1) at least a thermoplastic elastic material of at least a acrylic psa of the about 5-95% weight of melting mixing and about 5-95% weight,

(2) (a) described melt-mixed material is shaped, or

(b) described melt-mixed material is shaped and stretches it, form contact adhesive composition,

Described composition is joined two Outboard Sections that have trilaminar feed head at least, the film-forming polymer resin is joined the middle portion of described feed head, to form the pressure-sensitive adhesive tape of dual coating, described tackiness agent has the form that comprises two kinds of different zones at least, the first area has basic successive character, and second area is in described first area, tackiness agent form have on the direction fibrous to flaky character and

(3) make described self adhesive tape cooling.

The present invention also provides a kind of contact adhesive composition bonding with skin that be used for, it comprises substrate and suprabasil contact adhesive composition, and described composition is the blend composition of at least a thermoplastic elastic material of a kind of at least a acrylic psa of about 5-95% weight and about 5-95% weight.Described composition has a kind of form that comprises two kinds of different zones at least, the first area has basic successive character, and second area has fibrous extremely flaky character, and described fiber or sheet are arranged in described first area and parallel with the binder composition major surfaces.Suitable substrate or backing comprise that the backing (as film, foam material and laminated product thereof) of sealing (promptly can not breathe freely) and the backing of non-tight (can breathe freely) are (as the supatex fabric and the hot pressing supatex fabric of polymeric film, Woven fabric, entanglement (hydroentangled) or meltblown fabric of perforation and so on.

When the successive zone is a pressure sensitive adhesive and fibrous (being discontinuity zone) has elasticity but when not having pressure-sensitive-adhesive to the sheet zone, can observe the peel adhesion (peel adhesion) that increases than simple acrylic psa and solution blended acrylic acid or the like/thermoplastic elastomerics pressure sensitive adhesive.When the successive zone is not pressure sensitive adhesive, can observe limited viscosity (tack) and peel adhesion.When every kind of polymer materials all was pressure sensitive adhesive, said composition had the stronger peel adhesion of similar pressure sensitive adhesion agent composition that forms and be coated with than from solvent.

Pressure sensitive adhesive of the present invention can be used for various uses, but as medical adhesive tape, sealing tape, insulating tape reset strap (repositionable tape), peelable band and flaky material.By suitable selective polymer material, can in tackiness agent, design various required final use character.When the present composition as with the tackiness agent of skin contact the time, it has than acrylic psa or the higher initial adhesion of thermoplastic elastic material.In addition, for example can control the binding property of aging back to skin by the relative consumption of regulating acrylic psa or thermoplastic elastic material.

The brief introduction of accompanying drawing

Fig. 1 amplifies 1000 times of viewgraph of cross-section along binder layer among the captured embodiment 5 of film forming direction with scanning electronic microscope (SEM).

Fig. 2 is the exterior view with binder layer in the Comparative Examples 6 of 10 times of opticmicroscopes shootings.

Fig. 3 amplifies 6000 times of viewgraph of cross-section along binder layer among the captured embodiment 7 of film forming direction with transmission type microscope (TEM).

Fig. 4 amplifies 6000 times of viewgraph of cross-section along binder layer among the captured embodiment 8 of film forming direction with transmission type microscope.

Fig. 5 amplifies 6000 times of viewgraph of cross-section along binder layer among the captured embodiment 9 of film forming direction with transmission type microscope.

Fig. 6 amplifies 3000 times of viewgraph of cross-section along binder layer among the captured embodiment 11 of film forming direction with scanning electronic microscope.

Fig. 7 amplifies 2000 times of viewgraph of cross-section along binder layer among the captured embodiment 13 of film forming direction with scanning electronic microscope.

Fig. 8 amplifies 2000 times of viewgraph of cross-section along binder layer among the laterally captured embodiment 13 of substrate with scanning electronic microscope.

Fig. 9 amplifies 1000 times of viewgraph of cross-section along binder layer among the captured embodiment 18 of film forming direction with scanning electronic microscope.

Figure 10 amplifies 1000 times of viewgraph of cross-section along binder layer among the laterally captured embodiment 18 of substrate with scanning electronic microscope.

Figure 11 amplifies 2000 times of viewgraph of cross-section along binder layer among the captured embodiment 22 of film forming direction with scanning electronic microscope.

Figure 12 amplifies 2000 times of viewgraph of cross-section along binder layer among the laterally captured embodiment 22 of substrate with scanning electronic microscope.

Figure 13 amplifies 1000 times of viewgraph of cross-section along binder layer among the captured embodiment 40 of film forming direction with scanning electronic microscope.

Figure 14 is dynamic mechanical analysis figure among the embodiment 24-26.

Detailed description of the invention

The glass transition temperature of acrylic psa is generally-20 ℃ or lower, and this adhesive can contain the C of 100-80% weight₃-C ₁₂The polar compound (such as acrylic acid, methacrylic acid, ethylene vinyl acetate (ethylene vinyl acetate), NVP and the large monomer of styrene) of Arrcostab component (such as Isooctyl acrylate monomer, acrylic acid (2-ethyl hexyl) ester and n-butyl acrylate) and 0-20% weight. Acrylic psa better contains the acrylic acid of 0-20% weight and the Isooctyl acrylate monomer of 100-80% weight. This contact adhesive can be inherent viscosity or tackify. To the useful tackifying resin of acrylic resin be rosin ester (as available from Hercules, the FORAL of Inc.^TM85), aromatic resin (as available from Hercules, the PICCOTEX of Inc.^TMLC-55WK) and aliphatic resin (such as the ESCOREZ available from Exxon Chemical Co.^TM 1310LC)。

The second component of contact adhesive composition of the present invention is the thermoplastic elastic material of mixing with acrylic psa. The thermoplastic elastic material contains two kinds of fragments, i.e. hard segment and soft chain segment at least. Its glass transition temperature is greater than 50 ℃, and has elasticity in a segment therein. By selection material, make it under serviceability temperature with the enough incompatible and non-activity of contact adhesive, thereby produce the contact adhesive composition that has at least two zoness of different. Certainly, more than one second component can be mixed with contact adhesive. Second component can be, also can not be a kind of contact adhesive.

Can be used for thermoplastic elastic material of the present invention for example comprise line style, radially, star, taper (linear, radial, star and tapered) or the polymer of side chain, such as styrene-isoprene block copolymer (such as the KRATON available from Shell Chemical Co.^TMD1107P and EniChem Elastomers Americas, the EUROPRENE of Inc.^TMSOL TE 9110), line style styrene-(ethene-butylene) block copolymer is (such as the KRATON available from Shell Chemical Co.^TMG1657), line style styrene-(ethylene-propylene) block copolymer is (such as the KRATON available from Shell Chemical Co.^TMG1657X), SIS is (such as the KRATON available from Shell Chemical Co.^TMG1119P), line style radially with the star styrene-butadiene block copolymer (such as the KRATON available from Shell Chemical Co.^TMG1118X, available from EniChem Elastomers Americas, the EUROPRENE of Inc.^TMSOL TE 6205), polyether ester is (such as the HYTREL of DuPont Co.^TMG3548) with as with general formula-(CH₂CHR) _xThe poly-alpha-olefin base thermoplastic elastic material of (R is the alkyl that contains 2-10 carbon atom in the formula) expression and based on the poly-alpha-olefin of metallocene catalysis (such as the ENGAGE available from Dow Plastics Co.^TMEG 8200, a kind of ethene/1-octene copolymer).

These thermoplastic elastic material can be carried out modification with tackifying resin or plasticizer, to reduce its melt viscosity, thereby be conducive to form fine dispersions, when mixing with acrylic psa, minimum phase size (phase dimension) is better approximately less than 20 microns. Can better can be molten mixed on molecular level with tackifying resin or plasticizer that the thermoplastic elastic material is used, namely be dissolvable in water the polymerized segment of any or all thermoplastic elastic material. Tackifying resin or plasticizer can with or can be molten mixed with acrylic psa. During use, the consumption of tackifying resin is generally about 5-300 weight portion, preferably approximately to 200 weight portions, take 100 weight portion thermoplastic elastic material as benchmark.

Esters of acrylic acid contact adhesive and thermoplastic elastic material can be mixed and coating with the melt extrusion technology. Mixing can with any make acrylic psa and thermoplastic elastic material basically equally distributed method carry out. By making the component that is in melting or soft state mix the mixture of preparation acrylic psa and thermoplastic elastic material with producing the equipment that disperses mixing, distributes mixing (distributive mixing) or both combinations. Can use partial or continuous mixed method. The example of batch mixed method comprises Brabender^TMOr Banbury^TMInterior mixing and rolling. Method for continuously mixing comprises single screw extruding, twin-screw extruding, disk extruding, reciprocal single screw extruding and the single screw extruding of pin barrel (pin barrel). Continuation method can both comprise distribution unit (as available from RAPRA Technology, Ltd., Shrewsbury, the CTM of England^TMAnd so on groove type transmit mixer), comprise again peg type (pin) mixed cell, static mixer and dispersal unit, such as Maddock mixed cell or Saxton mixed cell.

Behind the blend step, with comprising that shearing or stretcher strain or both methods will be softened or the mixture of melting propylene acids contact adhesive and thermoplastic elastic material is made coating, the form of this coating is so that contact adhesive forms basically continuous zone, and the thermoplastic elastic material forms the zone of fibrous or sheet. When tackifier are mixed with the thermoplastic elastic material, make it also become a kind of adhesive, then each adhesive area can be continuously or be total to the continuously zone of (co-continuous). These methods can be partial or continuous.

A kind of example of batch process is to place a part of mixture between required coated substrate and release liner, in the flat plate type pressing machine of heating, this composite construction is pressed into the coatings of pressure sensitive adhesive of desired thickness with enough temperature and pressures, then cools off the coating of gained.

The progressive forming method comprises pulls out contact adhesive composition from sheeting die, then with the plastic-substrates or other the suitable substrate contact that move. Relevant continuity method comprises extrudes contact adhesive composition and coextrusion back lining materials from sheeting die, then cooling forms pressure-sensitive adhesive tape. Other continuous manufacture comprises direct plastic-substrates or other suitable substrate contact with PRESSURE-SENSITIVE ADHESIVE COMPOUND and fast moving. In this method, can PRESSURE-SENSITIVE ADHESIVE COMPOUND be coated in the mobile substrate with the die head with elasticity die lip of contrary hole coating die head and so on. After the coating, with the direct method of chill roll or water-bath and so on and the indirect method of air or gas injection and so on the coatings of pressure sensitive adhesive quenching is solidified.

Each polymers compositions better has similar melt viscosity. It is relevant with concentration with the ratio of viscosities of component (viscosity ratio) to form the ability of finely divided form. Shear viscosity (is being 100s close to extruding mixing condition^-1With 175 ℃) shear rate under measure with capillary rheometer. When the higher polymeric material of viscosity was used as accessory constituent, the ratio of viscosities of accessory constituent and key component better was lower than 20: 1, better is lower than 10: 1. When the lower polymeric material of viscosity was used as accessory constituent, the ratio of viscosities of accessory constituent and key component was better greater than 1: 10, better greater than 1: 5. By adding plasticizer, tackifying resin or solvent or changing mixing temperature, can change the melt viscosity of various polymeric materials. If need to use solvent, more fortunately desolventizing before the coating step is in order to avoid bubble.

In melting mixing with apply and to be preferably at least a polymeric material in the operation and to be easy to stretch, so that basically continuous or form along the fibrous finely divided form to sheet zone (such as shaping sheet material, band, fiber, spheroid etc.) of the formation direction orientation of substrate in the continuum altogether at another kind of polymeric material. Better have enough interfacial adhesion between pressure sensitive adhesive component and thermoplastic elastomer component, shearing and stretcher strain to exist in the opposing forming step are conducive to form continuous film.

If do not have a kind of polymeric material in melting mixing and coating procedure, easily to be stretched or do not have enough interfacial adhesion, then may produce the coatings of pressure sensitive adhesive with obvious discontinuity and granular quality. By using mixing condition, the degree of closeness (closeness of melt viscosities) of melt viscosity and the shearing/stretching condition in the extrusion process of selecting through suitably, can make fibrous thickness to the sheet zone enough thin, thus can generation and basic continous or the altogether delamination of continuum. Fibrous thickness to the sheet zone is better less than about 20 microns, better less than about 10 microns, preferably less than about 1 micron, although the neglecting greatly specific mixture (being the type of polymer), concentration, viscosity etc. of thickness and changing.

The present invention is further described with the following embodiment that invention scope is not played the qualification effect.In these embodiments, if there is not other explanation, all umbers, ratio and percentage ratio are all calculated by weight.Following test method is used for assessing the contact adhesive composition that makes with characterize polymers material and embodiment.Shear viscosity

Shear viscosity is used in 175 ℃ of high pressure capillary rheometer (available from the RHEOGRAPH 2001 of Gottfert Co.) measurements of operation down.It is 1 millimeter kapillary die head that this rheometer is equipped with 30 millimeters long and diameter.At 100s ^-1During velocity of shear, available Poiseuille formula calculates apparent viscosity, converts it into actual viscosity with the Weissenberg-Rabinovitch updating formula then.180 ° of peel adhesion tests

Test the 180 ° peel adhesion of the pressure-sensitive adhesive tape sample of 1.25 centimetres wide and 15 meters long to glass and/or smooth curtain coating biaxially oriented polypropylene film.To self adhesive tape roll extrusion 4 times, make sample be adhered to test surfaces with the roller of 2.1 kilograms (4.5 pounds).Envrionment temperature (about 22 ℃) is aging down after about 1 hour, if there is not other explanation, (, Inc.) on 180 ° of geometric angles, this self adhesive tape is tested with 3M90 type slip/electronic stripping tester with the peeling rate of 30.5 centimeters/minute (12 inch per minute) available from Instrumentors.Shear strength test

Measure the shearing resistance of pressure-sensitive adhesive tape sample at ambient temperature.With the roller roll extrusion of 2.1 kilograms (4.1 pounds) 4 times, a section of 12.7 millimeters * 12.7 millimeters (0.5 inch * 0.5 inch) size on the pressure-sensitive adhesive tape is bonded on the stainless steel substrates.The weight of 1000 grams is anchored on this sample.Write down this weight and fall required time value.The spin adhesive test

The spin adhesive test is undertaken by the pressure-sensitive self adhesive tape test PSTC-6 of federation.In this test, 7/16 inch the steel ball runway along the Dou (21 ° 30 ') that inclines is rolled on the self adhesive tape sample that is placed on the runway bottom flat surface.The result is the distance of rolling on self adhesive tape before steel ball stops.The insulating tape binding power test

According to standard method, ASTMD1000-79, the program A of American Society for testing and materials (ASTM) test electrical isolation pressure-sensitive adhesive tape, test to steel plate (to the binding property of steel) with to base material (to the binding property of backing) with the speed of the 30.5 centimeters/minute pressure-sensitive adhesive tape sample that will insulate.The test of adhering skin power

The test of adhering skin power is carried out at the back that the self adhesive tape sample of 2.5 centimetres wide * 7.5 cm long is sticked on human body.Roller with 2 kiloponds comes rollback once on every self adhesive tape, about 30 centimeters/minute of the translational speed of this roller.Measuring of adhering skin power is with 180 ° of angles and the required peeling force of 15 centimeters/minute peeling rate release adhesive bands.Measure and just to have begun (T when bonding ₀), and 24 hours (T ₂₄) or 48 hours (T ₄₈) after adhering skin power.Preferred adhering skin power generally is: T ₀Be about 30-100 gram (1.2-3.8N/dm), T ₂₄Be about 150-300 gram (5.8-11.5N/dm) and T ₄₈Be about 150-300 gram (5.8-11.5N/dm).Adhering skin is thrown off test

Carried out 24 hours or during tuerculoderma in 48 hours, before the release adhesive band, check the self adhesive tape sample area value of throwing off from skin, and divided rank:

0 does not observe disengagement

1 only throws off at the edge of self adhesive tape

2 1-25% test area are thrown off

3 25-50% test area are thrown off

4 50-75% test area are thrown off

5 75-100% test area are thrown off

Get the mean value of 9 test-results.The average rank of preferred surgical appliance adhesive generally is less than about 2.5.The test of surgical appliance adhesive resistates

Carried out 24 hours or during tuerculoderma in 48 hours, the skin under the range estimation self adhesive tape sample, determine the amount of adhesive residue and divided rank:

0 does not observe resistates

1 only has resistates at the edge of self adhesive tape

2 1-25% test area have resistates

3 25-50% test area have resistates

4 50-75% test area have resistates

5 75-100% test area have resistates

Get the mean value of 9 test-results.The average rank of preferred surgical appliance adhesive generally is less than about 2.5.

Embodiment 1-6 and Comparative Examples C1

Among the embodiment 1, pressing United States Patent (USP) RE24,906 (Urich) make and exsiccant acrylic psa (shear viscosity is 150Pa-s for the different monooctyl ester of 95% weight percent acrylic acid/5% weight percent acrylic acid, emulsifying water polymerization) and thermoplastic elastomerics KRATON ^TMIt is 34 millimeters the co-rotating twin screw of engagement fully extruding machine (LEISTRITZ that D1107P (styrene isoprene styrene block copolymer (SIS), shear viscosity are 1250Pa-s) is placed on diameter ^TMType LSM34GL, available from Leistritz, Inc.) middle melting mixing.Above-mentioned United States Patent (USP) is with reference to being incorporated among the present invention.Above-mentioned thermoplastic elastomerics KRATON ^TMD1107P in advance with the IRGANOX of 1% weight ^TM1010 antioxidants mix.Thermoplastic elastomerics segmented copolymer joins in the reinforced larynx of extruding machine, and acrylic psa joins the 4th district.From 4 districts, the 1st district to the, temperature is increased to 177 ℃ of (100 are increased to 350) all the other regional temperature from 38 ℃ gradually and remains on 177 ℃ to 191 ℃ (350-375 °F).Regulate feed rate, making the pressure sensitive adhesive and the ratio of thermoplastic elastomerics segmented copolymer is 75: 25.

Bitruder is (CLOEREN in continuous discharge to the three layer feed head under the pressure that is about 0.69Mpa (1000psi) at least ^TMType 92-1033 is available from Cloeren Co.).This feed head is installed in (UTLTRAFLEX on 25.4 centimetres (10 inches) wide sheeting die ^TM40 die heads, the 89-12939 type is available from Extrusion Dies, Inc.).This die head remains on 177 ℃-191 ℃ (350 °F-375 °F), and die gap is 0.5-0.8 millimeter (a 20-30 mil).Mixed binder composition is squeezed into two Outboard Sections of feed head, and does not use the middle portion of this feed head; Then described binder composition is fed to 51 microns (2 mil) thick biaxial orientation polyethylene glycol terephthalate's film with the speed of 6.4 kilograms/hour (14 Pounds Per Hours) and scribbles between the paper substrates of releasing agent.This film and substrate are sent into the speed of 7.3 meters/minute (24 feet per minutes) between the chill roll that temperature remains on 21 ℃ (70), produce pressure-sensitive adhesive tape.In embodiment 2,3 and 4, will be in advance and 1% weight IRGANOX ^TM1010 blended thermoplastic elastomerics segmented copolymer KRATON ^TMD1117P (styrene isoprene styrene block copolymer (SIS); Shear viscosity is 690Pa-s) join in the acrylic psa, the ratio of acrylic adhesives and thermoplastic elastomerics segmented copolymer was respectively 75: 25,63: 37 and 25: 75.In embodiment 5, the thermoplastic elastomerics segmented copolymer that joins in the acrylic psa is KRATON ^TMD1118X (butadiene-styrene block copolymer; Shear viscosity is 1160Pa-s), the additional proportion of acrylic adhesives and thermoplastic elastomerics segmented copolymer is 82: 18.In embodiment 6, the thermoplastic elastomerics segmented copolymer that joins in the acrylic adhesives is that STEREON 827 is (available from FirestoneSynthetic Rubber ﹠amp; The styrene butadiene segmented copolymer of Latex Co.; Shear viscosity is 2040Pa-s), the additional proportion of acrylic adhesives and thermoplastic elastomerics segmented copolymer is 82: 18.In Comparative Examples C1, only prepare pressure-sensitive adhesive tape with acrylic psa, and other polymkeric substance of no use.

Measure the thickness of tackiness agent on the viscosity ratio of discontinuous component and basic continuous stand and the every kind of pressure-sensitive adhesive tape sample, 180 ° of peel adhesion of carrying out on 180 ° of peel adhesion tests on glass and the Biaially oriented polypropylene (BOPP) are tested.The results are shown in Table 1.Equally also determine the form of pressure sensitive adhesive among the embodiment 1-6.

Table 1

Embodiment	Viscosity ratio	Thickness	180 ° of peel adhesion (N/dm)
							(micron)	Glass	BOPP
1	8.3∶1	36	60	26
					2	4.6∶1	41	78	23
3	4.6∶1	41	64	25
					4	1∶4.6	46	36	20
C1	-	76	48	27
					5	7.7∶1	76	76	32
6	13.6∶1	76	86	29

By the data in the table 1 as can be known, in acrylic psa, add thermoplastic elastomerics segmented copolymer and improved among the embodiment 1,2,3,5 and 6 tackiness agent the peel adhesion of glass and Biaially oriented polypropylene.Embodiment 4 shows the bond properties that can control binder composition when using excessive thermoplastic elastomerics segmented copolymer.The peel value of this tackiness agent shows that its is suitable for work tackiness agent that can reset.In these embodiments, acrylic adhesives forms basic successive zone, and its form is sheet or band shape.In embodiment 4, thermoplastic elastomerics segmented copolymer forms basic successive zone, and its form is flaky.The scanning electronic microscope Photomicrograph of the painted binder layer cross section of osmium is illustrated in Fig. 1 among the embodiment 5.Acrylic adhesives is dark part.

Embodiment 7-9 and Comparative Examples C2-C6

In embodiment 7-9, remove and use by thermoplastic elastomerics (50 weight part KRATON ^TMD1107P) and tackifying resin (50 weight part WINGTACK PLUS ^TM, available from Goodyear Tire and Rubber Co.) and antioxidant (1 weight part IRGANOX ^TM1010) the thermoplastic elastomerics pressure sensitive adhesive of making replaces preparing pressure-sensitive adhesive tape by the step among the embodiment 1 beyond the thermoplastic elastomerics segmented copolymer.This tackiness agent is 35Pa-s in the shear viscosity of 191 ℃ (375).The ratio of acrylic psa and thermoplastic elastomerics pressure sensitive adhesive was respectively 70: 30,50: 50 and 25: 75.Acrylic adhesives is joined the reinforced larynx of extruding machine, and thermoplastic elastomerics tackiness agent joins the 4th district.Pressure-sensitive adhesive tape among the Comparative Examples C2 is only with the acrylic psa preparation, and other polymkeric substance useless.Pressure-sensitive adhesive tape among the Comparative Examples C3 is only used and the premixed thermoplastic elastomerics of antioxidant segmented copolymer KRATON ^TMD1107P and tackifying resin WINGTACK ^TMThe Plus preparation, their weight ratio is 50/50.

Measure the thickness of every kind of tackiness agent, carry out 180 ° of peel adhesion of glass are tested and 180 ° of peel adhesion of Biaially oriented polypropylene (BOPP) are tested.The results are shown in Table 2 for it.

In Comparative Examples C4, C5 and C6, with acrylic psa with by used among the embodiment 6-8 by segmented copolymer KRATON ^TMD1107P and tackifying resin WINGTACK ^TMThe pressure sensitive adhesive that PLUS makes is dissolved in the tetrahydrofuran (THF), and the ratio of acrylic adhesives and segmented copolymer/tackifying resin tackiness agent was respectively 70: 30,50: 50 and 25: 75.Contain the tackiness agent of 20% weight and the solvent of 80% weight in the solution.This solution is coated on 76 microns (3 mil) thick biaxial orientation polyethylene glycol terephthalate's film.Dry back coat-thickness is 38 microns under the room temperature.The pressure-sensitive adhesive tape that test makes like this is to 180 ° of peel adhesion tests of glass.The results are shown in Table 2.

Table 2

Embodiment	Thickness	180 ° of peel adhesion (N/dm)
				(micron)	Glass	BOPP
	C2	48	51				26
7				43	64	39
	8	48	81				43
9				64	75	49
	C3	56	95				65

Data from table 2 add thermoplastic elastomerics pressure sensitive adhesive and had both improved 180 ° of peel adhesion to glass as can be known in acrylic psa, improved 180 ° of peel adhesion to Biaially oriented polypropylene again.The form of each binder composition all is lamellated among the embodiment 7-9, and is promptly stratified.Acrylic adhesives forms successive zone basically among the embodiment 7, and thermoplastic elastomerics tackiness agent is discontinuous.In embodiment 8, the zone is common successive basically.Thermoplastic elastomerics tackiness agent is a successive on substantially among the embodiment 9, and acrylic adhesives is discontinuous.

Table 3

Embodiment	Peel adhesion (N/dm)
		C4	35
C5	33
		C6	30

Data from table 2 and 3 as can be known, the performance of extrusion molding melting mixing tackiness agent of the present invention is significantly better than the same binder composition that is made by the solvent application method.Form about these solution coat tackiness agents, Comparative Examples 4 and 5 acryloid cement or the thermoplastic elastomerics tackiness agent in the Comparative Examples 6 form the successive zone, and among Comparative Examples C4 and the C5 among thermoplastic elastomerics tackiness agent and the Comparative Examples C6 acrylic adhesives form discontinuity zone.

Embodiment 10-11 and Comparative Examples C7

Except acrylic psa and thermoplastic elastomerics polymer ratio are respectively 85: 15 and 70: 30 and melt polypropylene are joined CLOEREN ^TMBeyond the middle portion of feed head, prepare dual coating pressure-sensitive adhesive tape in embodiment 10 and 11 with embodiment 1 described melting mixing and extrusion process.Melt is carried out co-extrusion, have with generation that thickness is about 76-127 micron (3-5 mil) polypropylene inner core and thickness is the dual coating pressure-sensitive adhesive tape of the adhesive coating of 25 and 38 microns (1.0 and 1.5 microns).In Comparative Examples C7, except omitting the thermoplastic elastomerics, prepare the pressure-sensitive adhesive tape of dual coating by embodiment 10 and 11 described methods.Test the 180 ° peel adhesion of every kind of dual coating pressure-sensitive adhesive tape to glass.Embodiment 10 and 11 and the result of Comparative Examples C7 be respectively 67N/dm (1730g/in), 74N/dm (1913g/in) and 51N/dm (1332g/in).This shows, in acrylic adhesives, add 180 ° of peel adhesion that the high-elastic physical efficiency of thermoplastic obviously increases tackiness agent.In embodiment 10 and 11, form is lamellated, and acrylic adhesives forms successive zone basically, and the thermoplastic elastomerics forms banded discontinuity zone.Fig. 6 represents that the tackiness agent of embodiment 11 amplifies 3000 times cross-sectional view with perosmic anhydride dyeing back on the film forming direction.

Embodiment 12 and 13 and Comparative Examples C8

In embodiment 12 and 13, except replace the aqueous emulsion polymerization acrylic psa with the suspension polymerization composition, prepare the pressure-sensitive adhesive tape of dual coating respectively by embodiment 10 and 11 described methods.According to United States Patent (USP) 4,833,179 (Young etc.) are prepared the acrylic psa of suspension polymerization with the following method: at one condenser, thermometer are housed and insert in 2 liters of dissociative reaction devices (split reactor) of heating jacket of cave, nitrogen inlet, stainless steel stirring rake that motor drives and band temperature control, add 750 gram deionized waters, in deionized water, add 2.5 gram zinc oxide and 0.75 gram hydrophilic silicon dioxide then (available from the CAB-O-SIL of Cabot Corp ^TMEH-5).Under the nitrogen purging, be heated to 55 ℃, till zinc oxide and silicon-dioxide disperse fully.At this moment, with 480 gram Isooctyl acrylate monomers, 20 gram methacrylic acids, 2.5 gram initiator (VAZO ^TM64, available from DuPont Co.) and the raw material of 0.5 gram isooctyl mercaptoacetate chain-transfer agent mix.Added in the initial aqueous mixture at the gained solution that keeps high degree of agitation (700rpm) will contain initiator and chain-transfer agent down then, obtained a good suspension.Proceed 6 hours at nitrogen purging down to major general reaction, during reaction is monitored, make temperature of reaction be lower than 70 ℃.Collect the pressure sensitive adhesive of gained, mechanical expression is at least 90% solid weight.In Comparative Examples C8,, prepare the pressure-sensitive adhesive tape of dual coating by embodiment 12 and 13 described methods except omitting thermoplastic elastomerics tackiness agent with individual.

Measure the 180 ° peel adhesion of every kind of self adhesive tape to glass.Embodiment 12 and 13 and the result of Comparative Examples C8 be respectively 32N/dm (830g/in), 74N/dm (1913g/in) and 24N/dm (615g/in), this shows and adds the stripping strength that thermoplastic elastomerics when high-content (particularly) has increased acrylic adhesives.

Among the embodiment 12 and 13, the acrylic adhesives zone is successive basically, and the thermoplastic elastomerics forms belt course, promptly is lamellarity.Fig. 7 represents that the tackiness agent of embodiment 13 amplifies 2000 times cross-sectional view with perosmic anhydride dyeing back on the film forming direction.Fig. 8 represents that the tackiness agent of embodiment 13 amplifies 2000 times cross-sectional view with perosmic anhydride dyeing back on perpendicular to the film forming direction.

Embodiment 14-17 and Comparative Examples C9

In embodiment 14 and 15, except used acrylic adhesives is by 465 gram Isooctyl acrylate monomers, 20 gram methacrylic acids, the big monomer (CHEMLINK of the 15 gram end capped polystyrene of methacrylic ester ^TM4500, available from Sartomer Co.), beyond the acrylic psa that makes of 0.25 gram acryloxy benzophenone and 0.35 gram Thiovanic acid monooctyl ester aqueous suspension polymerization, prepare the pressure-sensitive adhesive tape of dual coating by embodiment 12 and 13 described methods.In Comparative Examples C9, except omitting thermoplastic elastomerics segmented copolymer KRATON ^TMBeyond the D1107P, prepare the pressure-sensitive adhesive tape of dual coating by embodiment 14 and 15 described methods.In embodiment 16 and 17, except using thermoplastic elastomerics segmented copolymer KRATON ^TMG1657 (vinylbenzene-(ethene-butylene)-vinylbenzene) replaces KRATON ^TMBeyond the D1107P, prepare the pressure-sensitive adhesive tape of dual coating respectively by embodiment 14 and 15 described methods.Measure the peel adhesion of each pressure-sensitive adhesive tape to glass.The results are shown in Table 4.

Table 4

Embodiment	180 ° of peel adhesion (N/dm)	Shearing resistance (branch)
			C9	32	27
14	55	37
			15	66	29
16	17	43
			17	22	38

By the data in the table 4 as can be known, add KRATON ^TMD1107P has improved 180 ° of peel adhesion of suspension polymerization acrylic adhesives, and adds KRATON ^TMG1657 has improved the shearing resistance of tackiness agent.Add KRATON ^TMG1657 does not improve 180 ° of peel adhesion of tackiness agent, because the elastomeric elasticity of thermoplastic is not enough in this specific mixture.In embodiment 14-17, the acrylic adhesives zone all is a successive basically, and the thermoplastic elastomerics zone in embodiment 14 and 15 is flaky, and the thermoplastic elastomerics zone among the embodiment 16 and 17 is fibrous.

Embodiment 18 and 19

(the ZSK30 type is available from Werner ﹠amp with the co-rotating twin screw extruding machine in embodiment 18; PfleidererCorp., Ramsey, NJ, barrel diameter is 30 millimeters, length-to-diameter is 45: 1) with acrylic psa used among the embodiment 1 and thermoplastic elastomerics segmented copolymer KRATON ^TMD1320X (available from the multi-arm star styrene/isoprene multipolymer of Shell Chemical Co., it with the IRGANOX of 1% weight ^TM1010 pre-mixings) melting mixing.The blending ratio of acrylic adhesives and thermoplastic elastomerics segmented copolymer is 80: 20, and thermoplastic elastomerics segmented copolymer adds the I district, and acrylic psa adds the 3rd district.With the contact die head with this mixture extrusion molding on polyethylene film, used similar among surface covered and the embodiment 1, make pressure-sensitive adhesive tape.In embodiment 19, remove with polyolefine thermoplastic elastomerics (EMGAGE ^TMEG8200 is available from Dow Plastics Co.; Shear viscosity is 1030Pa-s) to replace thermoplastic elastomerics segmented copolymer and acrylic adhesives and the elastomeric ratio of thermoplastic be beyond 90: 10, prepares pressure sensitive adhesive by embodiment 24 described methods.Measure adhesive thickness and to 180 ° of peel adhesion values of glass, the results are shown in Table 5.

Table 5

Embodiment	Adhesive thickness (micron)	Peel adhesion (N/dm)
			18	47	＞77
19	36	63

Data from table 5 as can be known, the binder composition of being made by acrylic psa and thermoplastic elastomerics polymkeric substance has 180 ° of fabulous peel adhesion.Embodiment 18 and 19 has successive acrylic adhesives zone basically.In embodiment 18 and 19, the thermoplastic elastomerics forms sheet and fibrous zone respectively.The tackiness agent that Fig. 9 represents embodiment 18 is with cross-sectional view on the film forming direction of perosmic anhydride dyeing back.The tackiness agent that Figure 10 represents embodiment 18 is with perosmic anhydride dyeing back lateral cross figure.

Embodiment 20-23 and Comparative Examples C10

In embodiment 20, with acrylic psa used among the 75 weight part embodiment 1 and by 12.5 weight part thermoplastic elastomerics segmented copolymer KRATON ^TMD1107P, 1 weight part antioxidant IRGANOX ^TM1010 and 12.5 weight part tackifying resin ESCOREZ ^TMThe mixture melting mixing that 1310LC (available from ExxonChemical Co.) forms is extruded into pressure-sensitive adhesive tape by embodiment 18 described methods.In embodiment 21, except ratio is 50 parts by weight of acrylic acid ester adhesives, 25 weight part thermoplastic elastomerics segmented copolymers, 1 weight part antioxidant and 25 weight part tackifying resins, prepare pressure-sensitive adhesive tape by embodiment 20 described methods.In embodiment 22, except ratio is 25 parts by weight of acrylic acid class tackiness agents, 37.5 weight part thermoplastic elastomerics segmented copolymers, 1 weight part antioxidant and 37.5 weight part tackifying resins, prepare pressure-sensitive adhesive tape by embodiment 20 described methods.In embodiment 23, except thermoplastic elastomerics segmented copolymer is KRATON ^TMD1112P (styrene isoprene-styrene block copolymer) and ratio are beyond 50 parts by weight of acrylic acid class tackiness agents, 25 weight part thermoplastic elastomerics segmented copolymers, 1 weight part antioxidant and the 25 weight part tackifying resins, to prepare pressure-sensitive adhesive tape by embodiment 20 described methods.The thickness of every kind of tackiness agent is 25 microns (1 mils).

Comparative Examples C10 presses embodiment 20 described method preparations, but only contains acrylic psa.The test pressure-sensitive adhesive tape is to 180 ° of peel adhesion of glass, to the shearing resistance and the spin viscosity of fiberboard and polished steel.The results are shown in Table 6.

Table 6

Embodiment	Shearing resistance (branch)		Spin viscosity	Peel adhesion
					FB	SS	(micron)	(N/dm)
	C10	5	31	35					32
20					-	14	36	38
	21	9	15	44					35
22					6	26	43	59
	23	7	26	38					50

By the data in the table 6 as can be known, add 180 ° of peel adhesion that thermoplastic elastomerics segmented copolymer and tackifying resin can improve the esters of acrylic acid pressure sensitive adhesive, using KRATON ^TMCan observe bigger raising in the binder composition of the embodiment 22 that D1107P thermoplastic elastomerics segmented copolymer makes, and use KRATON ^TMCan observe significantly improving of peel adhesion in the tackiness agent that D1112 thermoplastic elastomerics segmented copolymer makes.Even when the elastomeric content of tackify thermoplastic during up to 75% weight, the tackiness agent among the embodiment 20-23 still keeps the fabulous spin viscosity that only contains acrylic psa.In embodiment 20, acrylic adhesives forms the successive zone, and thermoplastic elastomerics/tackifying resin forms banded sheet structure.In embodiment 21, structure is lamellated, and acrylic adhesives and thermoplastic elastomerics/tackifying resin zone are to be total to successive basically.In embodiment 22, thermoplastic elastomerics/tackifying resin zone forms successive zone basically, and acrylic adhesives is banded sheet form.The tackiness agent that Figure 11 represents embodiment 22 amplifies cross-sectional view on 2000 times the film forming direction with perosmic anhydride dyeing back.Figure 12 represents that the tackiness agent of embodiment 22 amplifies 2000 times cross-sectional view with perosmic anhydride dyeing back on perpendicular to the substrate direction.In embodiment 23, structure is lamellated, and acrylic adhesives zone and thermoplastic elastomerics/tackifying resin zone are common successive basically.

Embodiment 24-27 and Comparative Examples C11 and C12

In embodiment 24-27, prepare the esters of acrylic acid pressure sensitive adhesive by embodiment 1 described method.The preparation have the acrylic adhesives inner core and with antioxidant (1 weight part IRGANOX ^TM1010, available from Ciba-Geigy Corp.) blended thermoplastic elastomerics polymkeric substance (99 weight part KRATON ^TMD1107P) outer field core-shell wire rod.Acrylic adhesives, thermoplastic elastomerics and antioxidant weight ratio used among the embodiment 24-27 were respectively 70: 30: 1,75: 25: 1,80: 20: 1 and 70: 30: 1.Wire rod is placed on quenching in the water, dry back adds that (the ZSK30 type is available from Werner ﹠amp in the homodromal Bitruder; Pfleiderer Corp.).In embodiment 24-27, to be about 25 gram/rice ²(6 grains/155 centimetre ²) coating weight tackiness agent is coated on the film that does not contain polyvinyl chloride.This film is 80 parts by weight of ethylene-vinyl-acetic ester and 20 parts by weight of ethylene-propylene-elastoprene and by United States Patent (USP) 5,284, the mixture of the flame-retardant system that 889 described methods make.Described flame-retardant system contains the hibbsite of 20 weight parts, the decabromodiphynly oxide and the 5 weight part ANTIMONY TRIOXIDE SB 203 99.8 PCT of 11 weight parts.Above-mentioned patent reference is incorporated into the present invention.In embodiment 30, to be about 35 gram/rice ²(8.4 grains/155 centimetre ²) coating weight tackiness agent is coated on the polyvinyl chloride film backing (trade name is 5A1Q801-1, available from Nanya Plastics Corp.).In Comparative Examples C11, to be about 75 gram/rice ²(18 grains/155 centimetre ²) coating weight with 100 weight part thermoplastic elastomerics (KRATON ^TMD1107P) and 1 weight part antioxidant (IRGANOX ^TM1010) mixture is coated on the tape backing that does not contain polyvinyl chloride.In Comparative Examples C12, to be about 47 gram/rice ²(11.4 grains/155 centimetre ²) coating weight only be coated on the backing that does not contain polyvinyl chloride with acrylic adhesives.

Tackiness agent is to the peel adhesion of steel and backing when measuring 20 ℃ and-18 ℃ with the insulating tape adhesion test, and the data of gained are standardized into 29 gram/rice with following formula ²(7 grains/155 centimetre ²) coat weight.

Coat weight is per 155 centimetres in the formula ²Binder wt on (4 inches * 6 inches) area.The results are shown in Table 7.

Table 7

Embodiment bounding force (N/dm)	C11	C12	24	25	26	27
							Gang @20 ℃	0.7	12	17	26	23	20
Bei Chen @20 ℃	0.4	5.2	4.7	7.5	6.5	22
							Gang @-18 ℃	0	26	38	54	45	-
Bei Chen @-18 ℃	0	13	31	41	37	-

Data from table 7 as can be known, the pressure-sensitive adhesive tape of embodiment of the invention 24-27 is better than each single component to the performance of backing during to steel and 20 ℃ at 20 ℃.In the time of-18 ℃, the performance of the pressure-sensitive insulating tape of embodiment 24-27 is significantly better than the insulating tape of Comparative Examples C11 and C12.

When applying the adhesive material of embodiment 24-26, collect about 1-2 mm thick tackiness agent sample from die head and place polyester to take off on the lining.Use RHEOMETRIC ^TMKinetic analyzer (available from Rheometric Scientific, Inc) carries out dynamic mechanical analysis to these samples.The dynamic mechanical property G ' that Figure 14 represents to measure gained (ω) and tan ²δ, its short-and-medium stroke of dotted line represented embodiment 24, and pecked line is represented embodiment 25, and solid line is represented embodiment 26.Compliance value (ω) x (1+tan of formula J (t)=1/{G ' ²δ) } calculate, G ' is to shear storage modulus (ω) in the formula, and it equals (stretching storage modulus)/3, and J (t) is the shear creep compliance, and it is that a kind of of tackiness agent pliability measures.J (t) value is high more, and tackiness agent is good more with contacting of institute adhesive surface.With centimetre ²/ dyne is that the results are shown in Table 8 in unit.

Table 8

Embodiment	24	25	26
				Tanδ@-20℃	0.79	0.82	1.13
@-10℃	0.39	0.44	0.56
				@23℃	0.30	0.33	0.32
G ' (dynes per centimeter 2)@-20℃	5.0×10 6	4.3×10 6	6.5×10 6
				@-10℃	3.0×10 6	2.0×10 6	2.9×10 6
@23℃	7.8×10 5	6.4×10 5	7.5×10 5
				J (t) (centimetre 2@-20 ℃ of/dyne)	1.6×10 -7	1.8×10 -7	1.0×10 -7
@-10℃	3.1×10 -7	4.6×10 -7	3.0×10 -7
				@23℃	12.0×10 -7	15.0×10 -7	13.0×10 -7

By the data in the table 8 as can be known, each pressure-sensitive adhesive tape among the embodiment 24-26 all has good flexibility, but the self adhesive tape of embodiment 25 has best performance.This flexibility (being pliability) shows tackiness agent of the present invention and surperficial the contact well of institute's adherent, and this tackiness agent generally has good peel adhesion.

Embodiment 28 and Comparative Examples C13

Prepare pressure-sensitive adhesive tape by the method described in embodiment 15 and the Comparative Examples C9.(, Inc.) every kind of self adhesive tape sample is carried out uv irradiating with the #QC120244ANIR type ultraviolet treater that intermediate mercuryvapour lamp is housed available from RPC Industries.Be radiated in the inert nitrogen atmosphere and carry out, the dosage after the calibration is 100mJ/cm ², wavelength is 365 nanometers.Measure the 180 ° of peel adhesion and the shearing resistance of these self adhesive tapes.Its result is listed in the table 9 with the test-results to embodiment 15 and Comparative Examples C9.

Table 9

Embodiment	Peel adhesion (N/dm)	Shearing resistance (branch) (failure mode)
			C9	31.5	27 (cohesions)
15	55.3	37 (cohesions)
			C13	37.1	21 (binding propertys: break away from suddenly (pop-off)
28	71.7	216 (binding propertys: break away from suddenly)

Use and to increase the peel adhesion that crosslinked uv radiation curing has increased the self adhesive tape made from tackiness agent of the present invention significantly.Yet the most obvious increase that causes owing to the radiation sample is on shearing resistance, increase by 500 when the shearing resistance of self adhesive tape of the present invention compares not radiation after the radiation, and self adhesive tape shearing resistance after radiation of only making with acrylic adhesives has reduced on the contrary.

Embodiment 29-35 and Comparative Examples C14-15

According to different ratios with acrylic psa and the KRATON described in the embodiment 1 ^TMD1107P mixes, and applies with the batch mixing coating method then.For embodiment 29-35, with totally 45 the gram acrylic psa and KRATON ^TMD1107P (99 parts and 1 part of IRGANOX ^TM1010 antioxidant pre-mixings) pack into one 175 ℃ (347 °F) operation 50 the gram Brabender ^TMIn the sigma paddle stirrer.Add KRATON earlier ^TMD1107P adds acrylic psa then.Under the 50-75rpm rotating speed, this mixture was mixed 5 minutes.Blended acrylic psa and KRATON ^TMThe relative consumption of D1107P is respectively 40.5 grams and 4.5 grams (embodiment 29), 33.75 grams and 11.25 grams (embodiment 30), 22.5 grams and 22.5 grams (embodiment 31), 18 grams and 27 grams (embodiment 32), 11.25 grams and 33.75 grams (embodiment 33), 6.75 grams and 38.25 grams (embodiment 34) and 2.25 grams and 42.75 grams (embodiment 35).About 1-5 gram mixing material is placed between biaxial orientation polyethylene glycol terephthalate's film of paper that scribbles remover and 50-75 micron thickness, prepares the pressure-sensitive adhesive tape of each embodiment.Place it in then between two blocks of aluminium sheets in the hydraulic flat press with two 152 millimeters * 152 millimeters steel plates.Apply the pressure of 28MPa (4000psi) when 138 ℃ (280 °F), the residence time is 0.6 second, and producing thickness is the coatings of pressure sensitive adhesive of 76-102 micron (3-4 mil).Test the 180 ° peel adhesion of this band to glass.The results are shown in Table 10.

Table 10

Embodiment	Acrylic psa (% weight)	KRATON TMD1107P (% weight)	180 ° of peel adhesion (N/dm)
				C14	100	0	61
29	90	10	71
				30	75	25	81
31	50	50	81
				32	40	60	59
33	25	75	49
				34	15	85	29
35	5	95	26
				C15	0	100	0

Among the embodiment 29 and 30 form of tackiness agent be the successive acrylic psa mutually with flaky thermoplastic elastomerics mutually.Tackiness agent has acrylic psa and the elastomeric continuous lamellar phase altogether of thermoplastic among the embodiment 31 and 32.Embodiment 33-35 have successive non-sticky thermoplastic elastomerics mutually with discontinuous pressure sensitive adhesive sheet mutually.Because the axial deformation of platen-press coating method, formation are parallel to coating planar phase.As shown in Table 10, can control 180 ° of peel adhesion by changing acrylic psa and the elastomeric ratio of thermoplastic to glass.Shown the performance that 180 ° of peel adhesion from 180 ° of peel adhesion (embodiment 29-31) of improving to reduction and Geng Yi peel off (embodiment 32-35).

Embodiment 36-37

Except using the elastomeric ratio of different acrylic psa and acrylic psa and thermoplastic is 80: 20, prepares the acrylic acid or the like pressure-sensitive adhesive tape by embodiment 29 described methods.For embodiment 36, used esters of acrylic acid pressure sensitive adhesive is the own ester pressure sensitive adhesive of vinylformic acid (2-ethyl).It is by United States Patent (USP) 4,619, and the described general method of 979 (Kotnour etc.) is 90: 10: 0.05 with ratio: 0.3 Isooctyl acrylate monomer: vinylformic acid: isooctyl mercaptoacetate: VAZO ^TM64 (available from DuPont) premixture adds the tackiness agent that makes in 18 millimeters Leistritz retrograde rotation Bitruders.Described extruding machine is furnished with the whole screw rod of engagement fully.Above-mentioned patent reference is incorporated among the present invention.Extruding machine is airproof, and screw speed remains on 50rpm.Temperature in 8 districts, the 1st district to the remains on 72 ℃, 82 ℃, 92 ℃, 96 ℃, 100 ℃, 110 ℃, 115 ℃ and 120 ℃ respectively.Used acrylic psa is the n-butyl acrylate pressure sensitive adhesive that makes by the similarity method for preparing the own ester pressure sensitive adhesive of vinylformic acid (2-ethyl) among the embodiment 36 among the embodiment 37, different is that used raw material is that ratio is 83: 15: 2: 0.2: 2: 0.3 n-butyl acrylate: N,N-DMAA: vinylformic acid: 4-acryloxy benzophenone: Virahol and VAZO ^TM64, the rotating speed of extruding machine is 70rpm, and the temperature in 8 districts, the 1st district to the is respectively 70 ℃, 81 ℃, 92 ℃, 96 ℃, 105 ℃, 110 ℃ and 120 ℃.For each embodiment, acrylic psa and premixed KRATON ^TMD1107P and IRGANOX ^TMThe relative consumption of 1010 (blending ratio is that 100 parts of main elastomericss of heat are to 2 parts of antioxidants).Except only using acrylic psa and, preparing Comparative Examples C16 and C17 by embodiment 36 and 37 described methods respectively without the thermoplastic elastomerics.Test the 180 ° peel adhesion of each sample, and adhesive thickness and peel adhesion value are listed in the table 10 glass.

Table 10

Embodiment	Adhesive thickness (micron)	Peel adhesion (N/dm)
			36	100	78
C16	100	63
			37	100	108
C17	100	92

By the data in the table 10 as can be known, the binder composition of being made by acrylic psa and thermoplastic elastomerics segmented copolymer does not have better 180 ° of peel adhesion than not containing the elastomeric Comparative Examples of thermoplastic, the form of binder composition be the successive acrylic psa mutually with flaky thermoplastic elastomerics mutually.

Embodiment 38

In embodiment 38, according to the described method of embodiment 1 with the used acrylic psa of embodiment 1 and with 1% weight IRGANOX ^TM1010 premixed thermoplastic elastomerics polymkeric substance HYTREL ^TM5326 (available from a kind of polyether ester of DuPont, shear viscosity is 495Pa-s) preparation pressure-sensitive adhesive tape, making the ratio of acrylic adhesives and thermoplastic elastomerics polymkeric substance is 80: 20.The thickness of tackiness agent is 60 microns, is 40N/dm to 180 ° of peel adhesion of glass.The form of tackiness agent be the successive acrylic psa mutually with flaky thermoplastic elastomerics mutually.

Embodiment 39-42 and Comparative Examples C18 and C19

In embodiment 39,40 and 41, with ZSK 30 type co-rotating twin screw extruding machines (barrel diameter is 30 millimeters, and length-to-diameter is 37: 1) the aqueous suspension polymerization acrylic psa described in embodiment 12 and 13 (is mixed 50 parts of thermoplastic elastomerics segmented copolymer KRATON with thermoplastic elastomerics tackiness agent ^TMD1107P, 1 part of antioxidant IRGANOX ^TM1010 and 50 parts of tackifying resin ESCOREZ ^TM1310LC makes) melting mixing.The ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent was respectively 75: 25,50: 50 and 25: 75.Thermoplastic elastomerics segmented copolymer is added in the 1st district, tackifying resin is added in the 2nd district, acrylic psa is added the 3rd district.Temperature remains between 149-165 ℃.In embodiment 42, prepare pressure-sensitive adhesive tape with the thermoplastic elastomerics described in aqueous emulsion polymerization acrylic psa described in the embodiment 1 and the embodiment 29 by the method described in the embodiment 39; The ratio of acrylic psa and thermoplastic elastomerics segmented copolymer is 75: 25.In Comparative Examples C18, only prepare pressure-sensitive adhesive tape with acrylic adhesives.In Comparative Examples C19, only the thermoplastic elastomerics tackiness agent with tackify prepares pressure-sensitive adhesive tape.The adhesive coating thickness of all samples is about 50 microns (2 mils), and is coated in the weaving on the backing of blow-by (promptly ventilative).This backing is available from Milliken and Co.Spartanburg, and 180 * 48 plain weave acetic ester taffeta cloth of GA through upwards being the fiber of 75 DENIER, are the fiber of 150 DENIER on the broadwise.Binder composition among the embodiment 39 and 42 shows successive acrylic adhesives zone basically, and thermoplastic elastomerics/tackifying resin forms the stratiform strip region.In the binder composition of embodiment 40, acrylic adhesives and thermoplastic elastomerics/tackifying resin forms basically successive layer-shaped area altogether.In embodiment 41, thermoplastic elastomerics/tackifying resin forms successive zone basically, and acrylic adhesives forms the stratiform strip region.The tackiness agent that Figure 15 represents embodiment 40 is with the cross-sectional view on the film forming direction of perosmic anhydride dyeing back.The test pressure-sensitive adhesive tape is at firm (T when bonding ₀) and (T after 24 hours ₂₄) adhering skin power, the adhering skin after 24 hours come off and adhering skin resistates after 24 hours.The result is illustrated in the table 11.

Table 11

Embodiment	T 0(N/dm)	T 24(N/dm)	T 24Come off	T 24Resistates
					C18	2.2	7.9	1.8	1.0
39	3.0	11.2	1.6	0.8
					40	4.0	7.7	1.6	0.6
41	3.4	4.3	1.6	0.3
					C19	3.0	3.3	1.3	0.1
42	2.0	2.7	0.3	1.0

By the data in the table 11 as can be known, the pressure-sensitive adhesive tape of embodiment 39-42 has the advantages of good skin stripping performance, by suitable mixing acrylic adhesives and tackify or not the thermoplastic elastomerics of tackify can control T ₀: T ₂₄Bounding force.Particularly, the self adhesive tape among the embodiment 40 has the initial adhering skin power than the high 180-33% of the self adhesive tape that makes with any pressure sensitive adhesive component (Comparative Examples C18 and C19).In addition, the tackiness agent that provides of all embodiment all has acceptable 24 hours aging back adhering skin power.

Embodiment 43-45

In embodiment 43, with diameter is that 8.9 centimetres screw rod syringe mixing machine (screw pin barrelmixer) is (available from The French Oil Mill Machinery Co., Piqua, OH) with acrylic psa used among the embodiment 12 and thermoplastic elastomerics tackiness agent (by 100 parts of thermoplastic elastomerics segmented copolymer KRATON ^TMD1107P, 1.5 parts of antioxidant IRGANOX ^TM1076 (available from Ciba-Geigy Corp.), 1.5 parts of antioxidant CYANOX ^TM(available from American Cyanamide Corp., Wayne is NJ) with 70 parts of tackifying resin WINGTACK for LTDP ^TMPlus (available from Goodyear Chemical Co., Akron, OH) pre-mixing is made) melting mixing.The ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent is 65: 35.The segmentation temperature is elevated to 144 ℃ from 106 ℃.When composition leaves the syringe mixing machine, inject water by the amount of 1 part of per 100 parts of contact adhesive composition.The toothed gear pump that is connected to syringe mixing machine output terminal with heating tube is transported to temperature with contact adhesive composition and remains in 160 ℃ the trowelling film die head (wipe-film coating die), weaves backing so that with 1.8 kilograms/hour/25 centimetres wide speed of die head binder composition is coated in non-tight used among the embodiment 39-42.Regulate the speed of backing, so that the adhesive coating of mean thickness about 50 microns (2 mils) to be provided.In embodiment 44, except thermoplastic elastomerics tackiness agent is by 50 parts of thermoplastic elastomerics segmented copolymer KRATON ^TMD1119 (styrene isoprene styrene block copolymer (SIS), shear viscosity are 17Pa-s, available from Shell Chemical Co.), 2 parts of antioxidant IRGANOX ^TM1076 and 48 parts of tackifying resin WINGTACK ^TMOutside Plus mixes, prepare pressure-sensitive adhesive tape by embodiment 42 described methods.In embodiment 45, except with acrylic psa used among the embodiment 1 with by 50 parts of thermoplastic elastomerics segmented copolymer KRATON ^TMD1107P, 1 part of antioxidant IRGANOX ^TM1010 and 50 parts of tackifying resin ESCOREZ ^TMBeyond the thermoplastic elastomerics tackiness agent melting mixing that 1310LC mixes, prepare pressure sensitive adhesive by embodiment 43 described methods, wherein the ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent is 25: 75, the feeding speed of contact adhesive composition is 15.1 kilograms/hour, and the segmentation temperature remains between 124 ℃ to 131 ℃.Binder composition has successive acrylic adhesives district basically among the embodiment 43 and 44, and thermoplastic elastomerics/tackifying resin forms the stratiform strip region.Binder composition among the embodiment 45 has successive thermoplastic elastomerics/tackifying resin zone basically, and acrylic adhesives forms the stratiform strip region.The test pressure-sensitive adhesive tape is at firm (T when bonding ₀) and (T after 48 hours ₄₈) adhering skin power, the adhering skin after 48 hours come off and adhering skin resistates after 48 hours.The result is illustrated in the table 12.

Table 12

Embodiment	T 0(N/dm)	T 48(N/dm)	T 48Come off	T 48Resistates
					43	4.9	12.0	1.9	1.6
44	4.6	10.8	1.9	1.7
					45	2.1	5.4	0.7	0.3

By the data in the table 12 as can be known, having non-tight among the embodiment 43,44 and 45 weaves the pressure-sensitive adhesive tape of backing, different acrylic psa and thermoplastic elastomerics tackiness agent and has gratifying skin peeling performance.

Embodiment 46-48

In embodiment 46-48, use with embodiment 45 in identical thermoplastic elastomerics/tackifying resin tackiness agent and melting mixing coating method prepare pressure-sensitive adhesive tape with various non-tight backings.Acrylic adhesives is a tackiness agent used in embodiment 12 and 13.In embodiment 46, the ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent is 60: 40, and contact adhesive composition is applied on the demoulding lining, is laminated to then on the non-woven rayon fiber backing.This backing makes as follows: earlier viscosity rayon short fibre's dimension of 2.5-5 cm long and 1.5 DENIER is passed through a bitubular carding machine (available from Spinnbau GmbH, Bremen, Germany) make the fluffy fiber net that fibre weight is a 41-54 gram/rice 2, simultaneously this fluffy fiber net is densified to the tulle shape, sends into the gap of a pair of horizontal squeezing roller and carry out starching.Wherein Xia Mian squeezing roller is immersed in the rubbery acrylic ester starching emulsion (RHOPLEX that viscose fibre is used is housed ^TMB15 is available from Rhom and Haas Co.) water-bath in.The emulsion that dilute with water is above-mentioned is to provide the starching that approximates fibre weight weight; Dry then.In embodiment 47, the ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent is 50: 50, and contact adhesive composition is coated on the lining.With 450 Grams Per Hours/centimetre speed melt-blown micro-fiber is sprayed on the tackiness agent, form the backing of 80 micron thickness, basic weight is 20 gram/rice ²The diameter of melt-blown micro-fiber is about 5-10 micron, and it is by United States Patent (USP) 5,230, in 701 embodiment 1 described similar approach with PS 440-200 urethane (available from Morton International, Inc., Seabrook NH) makes.In embodiment 48, the ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent is 60: 40, and contact adhesive composition is applied to the SONTARA of 0.65 mm thick ^TM(basic weight is 44 gram/rice on 8010 backings ²Current twine the substrate of (hydroentangled) polyester nonwoven, available from DuPont Co.).In the binder composition of embodiment 46,47 and 48, acrylic adhesives and thermoplastic elastomerics/tackifying resin tackiness agent forms basically successive layer-shaped area altogether.The test pressure-sensitive adhesive tape is at firm (T when bonding ₀) and (T after 48 hours ₄₈) adhering skin power, the adhering skin after 48 hours come off and adhering skin resistates after 48 hours.Thickness and the test result of each binder composition embodiment are illustrated in the table 13.

Table 13

Embodiment	Thickness (micron)	T 0(N/dm)	T 48(N/dm)	T 48Come off	T 48Resistates
						46	21	2.1	6.5	0.1	0.6
47	39	2.6	6.1	0.5	0.0
						48	32	3.5	12.0	0.9	4.8

By the data in the table 13 as can be known, having non-tight among the embodiment 46,47 and 48 weaves the pressure-sensitive adhesive tape of backing, different acrylic psa and thermoplastic elastomerics tackiness agent and has gratifying skin peeling performance.

Embodiment 49-52

In embodiment 49-52, except using various sealed air-tight backings, prepare pressure-sensitive adhesive tape by the method described in the embodiment 46-48.In embodiment 49, the ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent is 60: 40, and this contact adhesive composition is applied on the polyethylene/vinyl acetate copolymer film of 117 micron thickness.This film is the ESCORENE that uses available from Exxon chemical company ^TM: S-31209 makes.This film is bored a hole, the density in hole be 100 holes/centimetre ²In embodiment 50, the ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent is 60: 40, contact adhesive composition is applied on the low-density polyethylene film of 76 micron thickness, and this film is to use available from the NA 964-085 resin of Quantum chemical company to make.In embodiment 51, the ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent is 50: 50, and contact adhesive composition is applied to that (No.9058 TA022Fleshtone is available from General Foam Corp. on the plastifying polyvinyl chloride foam of 0.57 mm thick, Carlstat, NJ).In embodiment 52, the ratio of acrylic adhesives and thermoplastic elastomerics tackiness agent is 50: 50, and contact adhesive composition is applied to polymkeric substance one side of white polymer/cloth laminated product.Described laminated product is with ENGAGE ^TM44 * 36 woven cloths (available from Burcott Mills) that are coated in 8200 (available from the polyolefin elastomer of Dow Plastics Company) extrusion molding go up and make.The manufacture method of white backing is as follows: with 1 part of 50: 50 titanium dioxide and new LDPE (film grade) (PWC00001, available from Reed Spectrum, Holden MA) mixture and 3 parts of ENGAGE ^TM8200 do to mix, and make this mixture melting mixing with 40 millimeters Bitruders (available from Berstorff) at 200 ℃, then extrusion molding and carry out pelletizing and make painted particle extruding the line material; In 1: 25 ratio with painted pellet and more uncoloured ENGAGE ^TM8200 dried mixing; Make this mixture melting mixing, and with the speed of about 270 Grams Per Minutes this mixture to be sent into diameter be that Davis Standard Model N 9485 single multiple screw extruders of 6.4 centimetres are (available from Davis Standard Div., Crompton and Knowles Corp., Pawcatuck, CT) in the reinforced larynx, the working temperature of this extruding machine is 204 ℃ (400 °F), 66 microns (2.6 mil) thick films of extrusion molding on cloth, the temperature of casting roller is set in 93 ℃ (200), form layers stampings; Under the speed of the pressure of 350N/cm and about 11 meters/minute (being about 35fpm) with the gap of this laminated product by two horizontal roller.In the binder composition of embodiment 49,50 and 52, acrylic adhesives and thermoplastic elastomerics/tackifying resin tackiness agent forms basically successive layer-shaped area altogether.In the binder composition of embodiment 51, acrylic adhesives forms successive zone basically, and thermoplastic elastomerics/tackifying resin tackiness agent forms band shape layer-shaped area.The test pressure-sensitive adhesive tape firm when bonding ( _T0) (T and after 48 hours ₄₈) adhering skin power, the adhering skin after 48 hours come off and adhering skin resistates after 48 hours.Thickness and the test result of each binder composition embodiment are illustrated in the table 14.

Table 14

Embodiment	Thickness (micron)	T 0(N/dm)	T 48(N/dm)	T 48Come off	T 48Resistates
						49	29	2.4	1.8	1.3	0.6
50	39	2.1	1.5	0.9	0.6
						51	39	5.6	7.6	0.3	1.8
52	50	1.5	3.7	1.1	0.3

By the data in the table 14 as can be known, the pressure-sensitive adhesive tape that has the sealed air-tight backing among the embodiment 49-52 has different skin peeling performances.

Embodiment 53

Except the MICRAL of per 100 parts of thermoplastic elastomerics tackiness agents with 10 parts ^TM1500 hibbsites (available from Salem Industries, Inc., Norcross, GA) with the pre-mixing of thermoplastic elastomerics tackiness agent outside, with the method for embodiment 18 and the material preparation pressure-sensitive adhesive tape of embodiment 52.The thickness of pressure sensitive adhesive is about 50 microns.Acrylic adhesives and thermoplastic elastomerics/tackifying resin tackiness agent forms basically successive laminate structure altogether.The test pressure-sensitive adhesive tape is at firm (T when bonding ₀) and (T after 48 hours ₄₈) adhering skin power, the adhering skin after 48 hours come off and adhering skin resistates after 48 hours.During beginning, adhering skin power is 1N/dm, is 3.1N/dm after 48 hours.To come off be 1 to adhering skin after 48 hours, and the adhering skin resistates is 0.

Do not depart from scope and spirit of the present invention and right, various improvement of the present invention and variation are conspicuous for those of skill in the art in the industry.Therefore, the present invention should only not be confined to the above-mentioned content of describing for schematic purpose.

Claims (12)

1. contact adhesive composition, it is the mixture of the thermoplastic elastomerics multipolymer of a kind of acrylic psa of about 5-95% weight and about 5-95% weight, described composition has a kind of form that comprises two kinds of different zones, the first area has basic successive character, and second area has fibrous extremely flaky character, described fiber or sheet are arranged in described first area, parallel with the major surfaces of binder composition.

2. contact adhesive composition as claimed in claim 1 is characterized in that acrylic psa contains C ₃-C ₁₂The polymkeric substance of alkyl ester.

3. contact adhesive composition as claimed in claim 2 is characterized in that acrylic psa contains the polymkeric substance of Isooctyl acrylate monomer, vinylformic acid (2-ethyl) own ester or n-butyl acrylate.

4. contact adhesive composition as claimed in claim 2 is characterized in that acrylic psa also contains a kind of polar compound.

5. contact adhesive composition as claimed in claim 4 is characterized in that described polar compound comprises vinylformic acid, methacrylic acid, ethylene vinyl acetate, N-vinyl pyrrolidone and the big monomer of vinylbenzene.

6. contact adhesive composition as claimed in claim 5 is characterized in that described esters of acrylic acid pressure sensitive adhesive contains the alkyl ester component of 100-80% weight and the polar compound of 0-20%.

7. contact adhesive composition as claimed in claim 1, it is characterized in that described thermoplastic elastic material comprise line style, radially, star, taper or side chain multipolymer.

8. contact adhesive composition as claimed in claim 7 is characterized in that described thermoplastic elastic material comprises styrene-isoprene block copolymer, vinylbenzene-(ethene-butylene) segmented copolymer, vinylbenzene-(ethylene-propylene) segmented copolymer, styrene-butadiene block copolymer, polyether ester and poly-alpha-olefin.

9. contact adhesive composition as claimed in claim 1 is characterized in that it also contains tackifying resin, and the content of described tackifying resin is up to 200% weight, is benchmark with the weight of thermoplastic elastic material.

10. method for preparing pressure sensitive adhesive as claimed in claim 1, it comprises the steps:

(1) at least a thermoplastic elastic material of at least a acrylic psa of the about 5-95% weight of melting mixing and about 5-95% weight,

(2) (a) described melt-mixed material is shaped, or

(b) described melt-mixed material is shaped and stretches it,

With form contact adhesive composition as claimed in claim 1 and

(3) make described composition cools.

11. method as claimed in claim 10 is characterized in that melting mixing carries out under dispersion condition or distribution occasion or its bonding force condition.

12. pressure-sensitive adhesive tape that contains contact adhesive composition as claimed in claim 1.

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