CN101376796B - Aqueous bottom glue for soft polychloroethylene contact adhesive tape and manufacturing method thereof - Google Patents
Aqueous bottom glue for soft polychloroethylene contact adhesive tape and manufacturing method thereof Download PDFInfo
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- CN101376796B CN101376796B CN2008102122686A CN200810212268A CN101376796B CN 101376796 B CN101376796 B CN 101376796B CN 2008102122686 A CN2008102122686 A CN 2008102122686A CN 200810212268 A CN200810212268 A CN 200810212268A CN 101376796 B CN101376796 B CN 101376796B
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Abstract
The invention relates to a novel water clearcole which has very good wetting ability and coating performance on a SPVC film substrate and can be used to replace a solvent clearcole for manufacturing the SPVC adhesive tape of a pressure sensitive adhesive on the existing production line of a coating machine. The water clearcole is manufactured by mixing the latex of a specially synthesized vinyl copolymer with one or a plurality of rubber latexes as well as a plurality of accessory ingredients including a wetting agent according to a certain proportion.
Description
Technical field the present invention relates to a kind of new aqueous bottom glue (also claiming the aqueous basecoat agent) and manufacture method thereof.Specifically, the present invention relates to a kind of when making flexible PVC (SPVC) pressure-sensitive adhesive tape, can be coated on the SPVC film substrate equably and make pressure-sensitive adhesive layer that coating subsequently gets on and base material between produce the more aqueous bottom glue and the manufacture method thereof of strong adhesive power.
Technical background is that the pressure-sensitive adhesive tape of base material has good mechanical property (especially snappiness and stretchiness), flame retardant properties, electrical insulation capability, heat-resistant deforming performance and processed and applied performance etc. with flexible PVC (SPVC) film, thereby the insulation that is widely used in various electrical elements and electric wire in fields such as automobile, machinofacture, instrument and household electrical appliances coats and ties up.In addition, the SPVC pressure-sensitive adhesive tape also is widely used in fields such as label, advertisement subsides and protection.The SPVC pressure-sensitive adhesive tape is a class bigger in the pressure-sensitive adhesive alternate product.
At present, industrial SPVC sealing tape goods are mostly coated drying on the flexible PVC film substrate, rolling and are divided with solvent-borne type rubber pressure-sensitive adhesive and cut into.In order to improve bounding force (this bounding force is called as base adhesion force) between pressure sensitive adhesive and the base material, to improve the pressure sensitive adhesion performance of sealing tape, nearly all SPVC sealing tape goods all adopt and be coated with earlier the special primer of one deck production technique of (also claiming silane coupling agent) before the pressure-sensitive adhesive coating equably on the SPVC base materials.With obtaining the special undercoat of one deck at the SPVC substrate surface after this primer curing,, promote the base adhesion force of pressure sensitive adhesive and base material to improve the surface property of base material.At present, the primer that is used in the SPVC substrate surface on the industrial production all is to belong to solvent type: be not the special solution of rubber in organic solvent, exactly by carry out the extraordinary vinyl polymer solution that polyreaction makes in organic solvent.(drying adhesive layer thickness will obtain uniform coating 0.5～3.0um), and the viscosity of primer solution must be very little, thereby its solids content is generally all very low because the undercoat of base material is all very thin usually.So, all contain the organic solvent (being generally toluene, hexane etc.) of a large amount of (up to 90%) in the industrial primer that is used in the SPVC base material at present.These organic solvents evaporate in the air in production, coating and drying (curing) process of primer, not only cause the wasting of resources, more can cause the serious environmental pollution, and the organic solvent of denier can be difficult to remain in the glue-line of sealing tape goods with avoiding, pollutes environment for use thereby also can slowly release in the sealing tape use.Therefore, extremely stand-by a kind of primer that does not have or environmental pollution is seldom arranged on the industrial production substitutes at present generally use but the serious solvent-borne type primer of environmental pollution is made the SPVC pressure-sensitive adhesive tape.Can satisfy environmental requirement, can reduce production costs again.
The emulsion of polymkeric substance or the aqueous solution are medium with water, do not have or seldom have the environmental pollution generation in processing and use.Therefore, be that the aqueous bottom glue of medium should be the fine substitute of solvent-borne type primer with water.Yet, the polymer emulsion or the aqueous solution generally all have higher surface tension, wettability at the SPVC substrate surface is relatively poor, is difficult to obtain the higher uniform coating of quality with general coating apparatus and coating process, and especially drying adhesive layer thickness is less than the very thin undercoat of 3.0um.The why industrial major cause that when making the SPVC pressure-sensitive adhesive tape, can only adopt the serious solvent-borne type primer of environmental pollution so far that Here it is.
Summary of the invention the invention provides a kind of new aqueous bottom glue and manufacture method thereof.This aqueous bottom glue has good wetting property to the SPVC substrate surface, and enough general coating apparatus of energy and coating process are with its higher even undercoat of quality of coating the SPVC substrate surface and obtaining very thin (drying adhesive layer is less than 3.0um).This undercoat can improve the bounding force (base adhesion force) between pressure sensitive adhesive and the SPVC base material as the solvent-borne type undercoat, improves the pressure sensitive adhesion performance of SPVC pressure-sensitive adhesive tape.That is to say, the invention provides a kind of new aqueous bottom glue that does not have or seldom have environmental pollution, can on current production devices, produce various qualified SPVC pressure-sensitive adhesive alternate products in order to substitute the serious solvent-borne type primer of environmental pollution that generally uses at present in the industry of flexible PVC (SPVC) pressure-sensitive adhesive tape is made fully.
This new aqueous bottom glue that the present invention relates to is by a kind of special synthetic vinyl copolymer emulsion and one or more rubber latexs with comprise that the multiple auxiliary agent blend by a certain percentage of wetting agent is formulated.Wherein, the shared ratio of each component (in solid weight calculating separately) is: the vinyl monomer copolymer emulsion accounts for 10-80 (wt.) %, the best is 30-65 (wt.) %, rubber latex accounts for 10-70 (wt.) %, the best is 23-54 (wt.) %, auxiliary agent accounts for 10-20 (wt.) %, and the best is 12-16 (wt.) %.
Vinyl monomer copolymer emulsion in the aqueous bottom glue is by vinylbenzene, vinyl toluene, methyl methacrylate, Jia Jibingxisuanyizhi, vinyl-acetic ester, methyl acrylate, hard monomers such as vinyl cyanide, and butyl acrylate, ethyl propenoate, Isooctyl acrylate monomer, dibutyl maleate, soft monomers such as maleic acid di-isooctyl, and methacrylic acid, vinylformic acid, Hydroxyethyl acrylate, Propylene glycol monoacrylate, acrylamide, N hydroxymethyl acrylamide, function monomers such as maleic anhydride, with the deionized water is medium, adopts industrial semi-continuous emulsion polymerizing technology commonly used to carry out emulsion copolymerization and makes.The prescription of vinyl monomer with the second-order transition temperature (Tg) of gained emulsion copolymers-10～+ 40 ℃ for well, be best at+5～25 ℃.This have higher Tg and a bigger vinyl copolymer component of molecular polarity, not only contributed bigger cohesive strength for aqueous bottom glue of the present invention, and can be more in the coating of primer and drying process attached to molecular polarity bigger flexible PVC substrate surface (because between vinyl copolymer polar molecule and the base material PVC polar molecule bigger avidity being arranged), thereby the bounding force of primer and base material is improved, and the adding of aromatic series vinyl monomer improved the intermiscibility of the softening agent in primer and the SPVC film, avoided migration of plasticizer opposite glue Effect on Performance.
Rubber latex in the aqueous bottom glue has commercially available styrene butadiene rubber latex, natural rubber latex, paracril latex, chloroprene rubber latex and their modified latex.These have the rubber or the modified rubber component of less molecular polarity, not only provide snappiness for aqueous bottom glue of the present invention, and in the coating of primer and drying process, can leave the bigger flexible PVC substrate surface of molecular polarity more and be distributed in the upper layer (because the avidity between the bigger PVC molecule of less rubber molecule of polarity and polarity is less) of primer, make the PVC substrate surface that scribbles primer have more nonpolar feature, thereby make more rubber pressure sensitive adhesive and the substrate surface of nonpolar feature that is coated with in the above that affinity and the bigger bounding force of generation preferably be arranged.Here it is, and why this aqueous bottom glue also can be as producing the solvent-borne type primer that generally uses at present, and the pressure sensitive adhesion performance that improves the SPVC pressure-sensitive adhesive tape significantly is the major cause of the base adhesion force of pressure sensitive adhesive especially.
Auxiliary agent in the aqueous bottom glue by wetting agent, defoamer, filler or pigment etc. several.The adding auxiliary agent mainly is the coating performance in order to obtain.Wetting agent is most important auxiliary agent, and it mainly acts on is the surface tension that reduces aqueous bottom glue, improves wetting ability and the coating performance of aqueous bottom glue at the SPVC substrate surface.The present invention has adopted efficient wetting agent, and usual amounts is many in the amount ratio general polymer emulsion; In addition, the present invention has also adopted several wetting agents to mix use.Even so just can guarantee that aqueous bottom glue adopts general coating apparatus and coating process, also can obtain enough to approach (drying adhesive layer thickness is less than 3um) and quality uniform coating preferably.The wetting agent that the present invention adopts all is the quite low efficient surfactants of some whipabilitys, mainly contain sodium salt (becoming the RX-01 of industry and trade company limited, the ABO of Rhodia Co. etc. as Beijing moral), the alkyl sodium sulfonate (as the K30 of Bayer AG) of sulfonic group succinate, the sodium salt (as the I-AFK of Lumiten Co.) and 1 of fatty acid condensation product, 2-propylene glycol, 1, ammediol, 1, polyvalent alcohol such as 2-butyleneglycol, glycerol and ethanol, propyl alcohol, Virahol, butanols, amylalcohol, hexanol, hexalin etc.The consumption of wetting agent is 30-80 (wt.) % of auxiliary agent total amount, and optimum amount is 45-60 (wt.) % of auxiliary agent total amount.
The effect of defoamer be prevent aqueous bottom glue in process for preparation because of stir or in (coating) process of use because of the issuable bubble of the rolling of glue spreader, production can be carried out smoothly.The defoamer that the present invention adopts has silicon type and non-silicon type defoamer, and consumption is 5-20 (wt.) % of auxiliary agent total amount.The main purpose that in aqueous bottom glue, adds small amount of filler and pigment be for painted with the various products of mark, secondly be in order to reduce cost.The present invention adopts one or both of more following mineral filler of using always and pigment: titanium dioxide (titanium dioxide), zinc oxide, light calcium carbonate, ferric oxide, carbon black etc., consumption is 0-65 (wt.) % of auxiliary agent total amount.
The manufacture method of aqueous bottom glue of the present invention comprises following two concrete steps: main component---a kind of vinyl copolymer emulsion that (a) adopts industrial semi-continuous emulsion polymerizing technology commonly used to synthesize aqueous bottom glue; (b) join in the above-mentioned vinyl copolymer emulsion by formula rate rubber latex and several auxiliary agents that one or more are commercially available, blend is mixed with needed aqueous bottom glue.
Narration specific embodiments more of the present invention below the specific implementation method, but the present invention is not limited to these embodiment.
Embodiment 1 vinyl copolymer emulsion synthetic 1. with vinylbenzene (St.) 40Kg, butyl acrylate (BA) 10Kg, Isooctyl acrylate monomer (2-EHA) 40Kg, methyl methacrylate (MMA) 30Kg, the mixture of vinyl monomers such as vinylformic acid (AA) 1.5Kg and methacrylic acid (MAA) 1.5Kg under agitation joins in the 80Kg deionized water that is dissolved with an amount of buffer reagent sodium bicarbonate and emulsifying agent Co-436 (product of a kind of Rhodia Inc.), makes pre-emulsion.2. in the 500L reactor, add deionized water 80Kg, sodium bicarbonate 2.0Kg and Co-4360.8Kg, constantly stir heat temperature raising down.Treat that temperature is raised to the aqueous solution that adds initiator ammonium persulfate 0.45Kg after 78 ℃.Holding temperature adds in the 4h at 82-84 ℃ of pre-emulsion that at the uniform velocity adds above-mentioned vinyl monomer then.3. maintain 83-85 ℃ and continue stirring reaction 1h, the cooled and filtered discharging promptly gets the vinyl copolymer emulsion that can be used for further preparing aqueous bottom glue, and its solid content is 30-33 (wt.) %.
The normal temperature that is formulated in of aqueous bottom glue constantly stirs down, with commercially available wetting agent RX-012.2Kg and 1, auxiliary agents such as 2-propylene glycol 6.5Kg, defoamer DF8690.5Kg and light calcium carbonate 8.0Kg join among the above-mentioned vinyl copolymer emulsion 156Kg that makes successively, add commercially available natural rubber latex (solid content is 50 (wt.) %) 72Kg after stirring again, be diluted to solid content 30 (wt.) % with deionized water after stirring, promptly get required aqueous bottom glue.
The application of aqueous bottom glue and effect thereof with on the present SPVC pressure-sensitive adhesive tape production line in order to the coating apparatus and the coating process of coating solvent type primer, the aqueous bottom glue of above-mentioned gained is coated on the thick SPVC film substrate of 0.15mm, oven dry back (drying adhesive layer thickness is 2um) is observed the coating quality of primer glue-line and is coated solvent-borne type rubber pressure sensitive adhesive (the drying adhesive layer total thickness is 20um) immediately, makes pressure-sensitive adhesive tape finished product volume.The various performances of test sealing tape behind the slaking 8h in 70 ℃ of environment: 180 ° of stripping strengths of pressing CNS GB/T2792-1998 test sealing tape; Press the initial cohesiveness of CNS GB/T4852-1984 test sealing tape; Press the low speed uncoiling intensity of CNS GB/T4850-1984 test sealing tape; Hold the viscosity energy by CNS GB/T8451-1998 test sealing tape.The The performance test results of above-mentioned pressure-sensitive adhesive alternate product is listed in table 1.
Embodiment 2 is in vinyl copolymer emulsion synthetic, and the prescription of vinyl monomer mixture is: MMA48Kg, vinyl-acetic ester (VAc) 20Kg, BA32Kg, 2-EHA18Kg, Hydroxyethyl acrylate (HEA) 3.0Kg and vinylformic acid (AA) 2.0Kg.All the other are all with embodiment 1.In the preparation of aqueous bottom glue, adopt commercially available natural rubber latex (solid content 50wt%) 48Kg and commercially available styrene butadiene rubber latex (solid content is 50 (wt.) %) 25Kg, all the other are all with embodiment 1.Make the electric pressure-sensitive adhesive tape finished product volume of SPVC with embodiment 1 described method.Further use the described method of embodiment 1 and the various performances of this pressure-sensitive adhesive alternate product of standard testing again, test result is listed in table 1.
Equipment and method that comparative example 1 usefulness embodiment 1 is described, solvent-borne type primer (primer 951, solid content 10%) commonly used was coated on the identical SPVC film substrate during our company produced, and pressure-sensitive adhesive tape finished product volume is made in oven dry back (drying adhesive layer total thickness 20um).With embodiment 1 described method and its various performances of standard testing, the result also lists in table 1.
Comparative example 2 adopts wetting agent RX-011.0Kg and 1 in the aqueous bottom glue preparation, 2-propylene glycol 1.5Kg, and all the other are all with embodiment 1.Observe the coating quality of aqueous bottom glue and the various performances of testing prepared SPVC pressure-sensitive adhesive tape, the result also lists in table 1.
The performance of the coating quality of the various primers of table 1 and SPVC pressure-sensitive adhesive tape
Annotate: 1) adopt to draw together to be coated with coating method, primer is coated with the back coating on the SPVC base material evenly smooth, and not having handicappeds such as ' blooming ', bubble, flake is " good "; Coating have obviously ' bloom ', handicappeds such as bubble, flake are " poor ".
2) sealing tape draws back after pasting (promptly two glue faces are pasted mutually) fast, and a little degumming phenomenon is arranged behind the triplicate; Embodiment 1,2 and comparative example 1 no degumming phenomenon take place.
Claims (2)
1. aqueous bottom glue that is applicable to the flexible PVC pressure-sensitive adhesive tape, it is characterized in that: described aqueous bottom glue is formulated by a kind of vinyl copolymer emulsion and rubber latex and auxiliary agent blend, its component and as follows by the weight percent solids consumption: described vinyl copolymer emulsion is by hard monomer vinylbenzene, vinyl toluene, methyl methacrylate, Jia Jibingxisuanyizhi, vinyl-acetic ester, methyl acrylate, vinyl cyanide and soft monomer butyl acrylate, Isooctyl acrylate monomer, dibutyl maleate, the maleic acid di-isooctyl, and function monomer methacrylic acid, vinylformic acid, Hydroxyethyl acrylate, Propylene glycol monoacrylate, acrylamide, N hydroxymethyl acrylamide, maleic anhydride, with the deionized water is medium, adopt semi-continuous emulsion polymerizing technology to carry out the copolymer emulsion that emulsion copolymerization makes, the second-order transition temperature of its multipolymer (Tg) is between-10～+ 40 ℃, and its consumption is 30-65 (wt.) %; Described rubber latex is natural rubber latex and styrene butadiene rubber latex, and its consumption is 23-54 (wt.) %; Described auxiliary agent is wetting agent, defoamer and filler, and its consumption is 12-16 (wt.) %.
2. aqueous bottom glue according to claim 1 is characterized in that the wetting agent in the described auxiliary agent is sulfonic group succinate sodium salt and 1, and 2-propylene glycol, consumption are 45-60 (wt.) % of auxiliary agent total amount.
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| CN2008102122686A CN101376796B (en) | 2008-09-08 | 2008-09-08 | Aqueous bottom glue for soft polychloroethylene contact adhesive tape and manufacturing method thereof |
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| CN2008102122686A CN101376796B (en) | 2008-09-08 | 2008-09-08 | Aqueous bottom glue for soft polychloroethylene contact adhesive tape and manufacturing method thereof |
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| CN101376796B true CN101376796B (en) | 2010-09-08 |
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| CN113861875A (en) * | 2021-09-29 | 2021-12-31 | 福建友谊胶粘带集团有限公司 | High-temperature-resistant automobile wire harness adhesive tape |
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| CN1037725A (en) * | 1988-05-18 | 1989-12-06 | 成都科技大学 | Multifunctional adhesive for shoes |
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Effective date of registration: 20170322 Address after: 072750 Baoding City, Zhuozhou Province Development Zone Industrial Park, Yan Yi Road, No. 9, No. Patentee after: Hebei Yongle adhesive tape Co., Ltd. Address before: 072750 Zhuozhou Yongle Road, Hebei, No. 88 Patentee before: Hebei Huaxia Enterprise Co., Ltd. |
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