JPH04309584A - Pressure-sensitive adhesive and adhesive sheet prepared therefrom - Google Patents
Pressure-sensitive adhesive and adhesive sheet prepared therefromInfo
- Publication number
- JPH04309584A JPH04309584A JP15627591A JP15627591A JPH04309584A JP H04309584 A JPH04309584 A JP H04309584A JP 15627591 A JP15627591 A JP 15627591A JP 15627591 A JP15627591 A JP 15627591A JP H04309584 A JPH04309584 A JP H04309584A
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- styrene
- pressure
- sensitive adhesive
- rubber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 30
- 239000000853 adhesive Substances 0.000 title claims abstract description 28
- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 26
- 229920001971 elastomer Polymers 0.000 claims abstract description 22
- 239000005060 rubber Substances 0.000 claims abstract description 20
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 12
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 claims abstract description 11
- 229920005601 base polymer Polymers 0.000 claims abstract description 8
- 229920001194 natural rubber Polymers 0.000 claims description 26
- 244000043261 Hevea brasiliensis Species 0.000 claims description 22
- 229920003052 natural elastomer Polymers 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 12
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 8
- 239000004800 polyvinyl chloride Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 abstract description 12
- 238000002156 mixing Methods 0.000 abstract description 6
- 229920001195 polyisoprene Polymers 0.000 abstract description 4
- 239000002390 adhesive tape Substances 0.000 description 15
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000004014 plasticizer Substances 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 102100041023 Coronin-2A Human genes 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- 101000748858 Homo sapiens Coronin-2A Proteins 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010696 ester oil Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920006132 styrene block copolymer Polymers 0.000 description 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、天然ゴム系の感圧性接
着剤と、その接着シート類に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to natural rubber-based pressure-sensitive adhesives and adhesive sheets thereof.
【０００２】0002
【従来の技術】天然ゴムなどをベースポリマーとした感
圧性接着剤は、種々の被着体に対して良好な接着性を示
し、特に低温接着性や粗面接着性が非常に良好なものと
して、古くから用いられている。[Prior Art] Pressure-sensitive adhesives using base polymers such as natural rubber exhibit good adhesion to a variety of adherends, and are known to have particularly good low-temperature adhesion and rough surface adhesion. , has been used since ancient times.
【０００３】しかるに、上記良好な接着特性を発揮させ
るために、接着剤配合成分として、軟化剤を多量に使用
したり、接着シート作製用の基材や被着体が軟質ポリ塩
化ビニルなどにて構成されて、これら基材や被着体から
軟化剤成分としての可塑剤が接着剤層中に多量に移行し
てくるような使用態様にあつては、接着剤の粘度低下が
著しく、これが原因で凝集破壊を生じる難点があつた。However, in order to exhibit the above-mentioned good adhesive properties, a large amount of softener is used as an adhesive component, and the base material and adherend for producing the adhesive sheet are made of soft polyvinyl chloride or the like. When used in a manner in which a large amount of plasticizer as a softener component migrates into the adhesive layer from these base materials or adherends, the viscosity of the adhesive decreases significantly, and this is the cause. However, there was a problem with cohesive failure.
【０００４】この対策として、ポリマーを架橋する方法
が知られているが、この方法では接着力が損なわれるた
め、あまり好ましいものとは言えない。そこで、天然ゴ
ムにスチレン−ブタジエン共重合ゴムからなる特定のゴ
ム質ポリマーを添加混合し、軟化剤の多量配合や移行な
どに起因した凝集力の低下を防ぐことによつて、接着剤
層の層強度を高める方法が、有効な手段として、利用さ
れている。[0004] As a countermeasure against this problem, a method of crosslinking the polymer is known, but this method impairs adhesive strength and is therefore not very preferable. Therefore, by adding and mixing a specific rubbery polymer consisting of styrene-butadiene copolymer rubber to natural rubber to prevent the decrease in cohesive force caused by blending a large amount of softener or migration, it is possible to form an adhesive layer. Methods of increasing strength are being used as effective means.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、この天
然ゴムとスチレン−ブタジエン共重合ゴムとは、完全相
溶とは言えず、接着力と凝集力とを両立させるため、両
者の重量比が２／８〜８／２となる割合でブレンドした
とき、溶解成分が経時的に分離してくる欠点があつた。
特に、この分離は、接着シート作製段階での接着剤の貯
蔵や、接着シートを低温で保存する場合によく発生し、
前者では再撹拌により、後者では保存温度の制約により
対処しており、いずれも経済的な負担が大きかつた。[Problems to be Solved by the Invention] However, this natural rubber and styrene-butadiene copolymer rubber cannot be said to be completely compatible, and in order to achieve both adhesive strength and cohesive strength, the weight ratio of the two must be 2/2. When blended at a ratio of 8 to 8/2, there was a drawback that dissolved components separated over time. In particular, this separation often occurs when the adhesive is stored at the adhesive sheet manufacturing stage or when the adhesive sheet is stored at low temperatures.
The former was handled by re-stirring, and the latter was handled by storage temperature constraints, both of which placed a heavy economic burden.
【０００６】本発明は、上記従来の事情に鑑み、天然ゴ
ムとスチレン−ブタジエン共重合ゴムとをブレンドする
場合の上記相溶性の間題を克服し、接着力と凝集力とを
満足するとともに、貯蔵，保存時の経時的安定性にもす
ぐれた天然ゴム系の感圧性接着剤とその接着シート類を
得ることを目的としている。In view of the above-mentioned conventional circumstances, the present invention overcomes the above-mentioned compatibility problem when blending natural rubber and styrene-butadiene copolymer rubber, satisfies adhesive strength and cohesive strength, and The objective is to obtain a natural rubber-based pressure-sensitive adhesive and its adhesive sheets that have excellent stability over time during storage and preservation.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記の目
的を達成するために鋭意検討した結果、天然ゴムとスチ
レン−ブタジエン共重合ゴムとの両者に相溶しうる第三
成分をブレンドすることにより、上記両成分の相溶性の
問題を克服でき、これにより低温接着性や粗面接着性な
どの接着力と凝集力とを満足し、かつ貯蔵，保存時の経
時的安定性にすぐれた感圧性接着剤とその接着シート類
が得られることを知り、本発明を完成するに至つた。[Means for Solving the Problem] As a result of intensive studies to achieve the above object, the present inventors have developed a blend of a third component that is compatible with both natural rubber and styrene-butadiene copolymer rubber. By doing so, it is possible to overcome the problem of compatibility between the two components, which satisfies the adhesion and cohesive strength such as low temperature adhesion and rough surface adhesion, and has excellent stability over time during storage and preservation. The inventors discovered that a pressure-sensitive adhesive and its adhesive sheets could be obtained, and completed the present invention.
【０００８】すなわち、本発明は、ａ）天然ゴムおよび
／またはポリイソプレンゴムと、ｂ）スチレン−ブタジ
エン共重合ゴムとを、重量比が２／８〜８／２となる割
合でブレンドし、これにさらにｃ）スチレン−イソプレ
ン−スチレンブロツク共重合体を加えて、ベースポリマ
ーを構成させたことを特徴とする感圧性接着剤に係るも
のである。また、本発明は、この感圧性接着剤を、基材
、たとえば軟質ポリ塩化ビニルシートなどの上に設けて
なるシート状やテープ状などの接着シート類に係るもの
である。That is, the present invention blends a) natural rubber and/or polyisoprene rubber and b) styrene-butadiene copolymer rubber at a weight ratio of 2/8 to 8/2, and Furthermore, c) a styrene-isoprene-styrene block copolymer is added to form a base polymer. The present invention also relates to adhesive sheets such as sheets and tapes in which the pressure-sensitive adhesive is provided on a base material such as a flexible polyvinyl chloride sheet.
【０００９】[0009]
【発明の構成・作用】本発明におけるａ成分の天然ゴム
は、イソプレンがシス形に重合した高分子化合物を主成
分としたものであつて、市販されるものがいずれも使用
可能である。また、この天然ゴムと同様の化学構造を有
するものとして、合成ポリイソプレンとして知られる、
数平均分子量が通常５０００００〜２００００００程度
のポリイソプレンゴム（シス形に限定されない）を、ａ
成分としてこれ単独でまたは上記天然ゴムと混合して用
いてもよい。DESCRIPTION OF THE PREFERRED EMBODIMENTS The natural rubber used as component a in the present invention is one whose main component is a polymer compound in which isoprene is polymerized in the cis form, and any commercially available natural rubber can be used. In addition, synthetic polyisoprene, which has a chemical structure similar to that of natural rubber, is
Polyisoprene rubber (not limited to cis form) having a number average molecular weight of usually about 500,000 to 2,000,000 is
It may be used as a component alone or in combination with the above natural rubber.
【００１０】本発明におけるｂ成分のスチレン−ブタジ
エン共重合ゴムは、スチレンとブタジエンとを重量比が
通常２０／８０から５０／５０となる割合でランダム共
重合させてなる、数平均分子量が２０００００〜３００
００００程度のゴム質ポリマーであり、市販されるもの
をいずれも使用することができる。The styrene-butadiene copolymer rubber as component b in the present invention is obtained by randomly copolymerizing styrene and butadiene at a weight ratio of usually 20/80 to 50/50, and has a number average molecular weight of 200,000 to 200,000. 300
0,000, and any commercially available rubber polymers can be used.
【００１１】本発明においては、上記ａ成分の天然ゴム
および／またはポリイソプレンゴムと、上記ｂ成分のス
チレン−ブタジエン共重合ゴムとを、重量比が２／８〜
８／２となる割合、好ましくは３／７〜７／３となる割
合でブレンドする。この範囲外となると、低温接着性や
粗面接着性を損なうか、あるいは十分な凝集力が得られ
ず、接着特性の改良を図れない。In the present invention, the weight ratio of the natural rubber and/or polyisoprene rubber as the component a and the styrene-butadiene copolymer rubber as the component b is 2/8 to 2/8.
Blend in a ratio of 8/2, preferably 3/7 to 7/3. If it is outside this range, low temperature adhesion and rough surface adhesion will be impaired, or sufficient cohesive force will not be obtained, making it impossible to improve adhesive properties.
【００１２】本発明においては、このようなａ，ｂ成分
からなるゴム質ポリマーに、さらにｃ成分としてのスチ
レン−イソプレン−スチレンブロツク共重合体を配合す
ることを特徴とする。このブロツク共重合体は、ａ，ｂ
両成分に良く相溶して、これら両成分の相互溶解性に好
結果を与え、低温保存下などでの分離現象を抑制するの
に大きく貢献する。The present invention is characterized in that a styrene-isoprene-styrene block copolymer as the c component is further blended into the rubbery polymer consisting of the a and b components. This block copolymer has a, b
It is well compatible with both components, gives good results to the mutual solubility of these two components, and greatly contributes to suppressing the separation phenomenon during low temperature storage.
【００１３】このようなスチレン−イソプレン−スチレ
ンブロツク共重合体は、市販品として容易に入手でき、
特に好ましくはポリスチレンブロツク部分とポリイソプ
レンブロツク部分との重量比が通常１０／９０〜２５／
７５の範囲内となり、またその数平均分子量が通常５０
０００〜５０００００の範囲内となるものを使用する。[0013] Such a styrene-isoprene-styrene block copolymer is easily available as a commercial product.
Particularly preferably, the weight ratio of the polystyrene block portion to the polyisoprene block portion is usually 10/90 to 25/2.
75, and the number average molecular weight is usually 50
Use a value within the range of 000 to 500,000.
【００１４】上記ｃ成分のスチレン−イソプレン−スチ
レンブロツク共重合体は、ａ，ｂ成分の混合割合に応じ
て、またａ成分として天然ゴムを用いるかポリイソプレ
ンゴムを用いるかなどによつて、その使用量が適宜決定
される。一般には、ａ，ｂ，ｃ三成分の合計量中、ｃ成
分の割合が、４〜５０重量％、好ましくは９〜４０重量
％となるようにするのがよい。少なすぎると所期の効果
が得られず、多くなりすぎると接着剤の凝集力が低下す
るおそれがある。The styrene-isoprene-styrene block copolymer of the above c component varies depending on the mixing ratio of the a and b components and whether natural rubber or polyisoprene rubber is used as the a component. The usage amount is determined accordingly. Generally, the proportion of component c in the total amount of three components a, b, and c is preferably 4 to 50% by weight, preferably 9 to 40% by weight. If it is too small, the desired effect may not be obtained, and if it is too large, the cohesive force of the adhesive may decrease.
【００１５】本発明の感圧性接着剤は、上記のａ，ｂ，
ｃ三成分をベースポリマーとしたものであつて、この接
着剤には、一般の天然ゴム系の感圧性接着剤に配合され
る各種の添加剤、たとえば粘着付与樹脂、軟化剤、老化
防止剤、着色剤などを適宜配合することができる。The pressure sensitive adhesive of the present invention has the above-mentioned a, b,
This adhesive has three components as a base polymer, and this adhesive contains various additives that are added to general natural rubber-based pressure-sensitive adhesives, such as tackifier resin, softener, anti-aging agent, A coloring agent and the like can be added as appropriate.
【００１６】上記の粘着付与樹脂としては、石油系樹脂
、テルペン系樹脂、ロジン系樹脂、フエノール系樹脂な
どが挙げられる。また、上記の軟化剤としては、フタル
酸エステル系、ナフテン系オイル、パラフイン系オイル
、動植物油などが用いられる。これらの粘着付与樹脂お
よび軟化剤は、その合計量が、前記のベースポリマー１
００重量部に対し、通常２０〜２００重量部となる使用
量とするのが望ましい。[0016] Examples of the above-mentioned tackifier resins include petroleum resins, terpene resins, rosin resins, and phenol resins. Further, as the above-mentioned softening agent, phthalic acid ester oil, naphthenic oil, paraffin oil, animal and vegetable oil, etc. are used. The total amount of these tackifying resins and softeners is equal to or greater than the base polymer 1 described above.
It is desirable that the amount used is usually 20 to 200 parts by weight per 00 parts by weight.
【００１７】本発明の接着シート類は、上記の感圧性接
着剤を基材上に設けて、シート状、テープ状などの形熊
としたものである。ここで、基材の材質としては、可塑
剤を多量に含む軟質ポリ塩化ビニルを選択使用でき、ま
たポリエチレンテレフタレートなどの他の各種樹脂や繊
維基材などを使用できる。前者の軟質ポリ塩化ビニル基
材では、この基材中の可塑剤が経時的に接着剤層に移行
してくるが、これによつて接着剤層の凝集力が大きく低
下することはない。[0017] The adhesive sheets of the present invention are those in which the pressure-sensitive adhesive described above is provided on a base material to form a shape such as a sheet or tape. Here, as the material of the base material, soft polyvinyl chloride containing a large amount of plasticizer can be selected, and various other resins such as polyethylene terephthalate, fiber base materials, etc. can be used. In the former flexible polyvinyl chloride base material, the plasticizer in the base material migrates to the adhesive layer over time, but this does not significantly reduce the cohesive force of the adhesive layer.
【００１８】また、上記の接着シート類は、種々の被着
体に適用でき、たとえば、可塑剤を多く含む軟質ポリ塩
化ビニル製などの被着体に適用した場合でも、被着体か
らの可塑剤の移行による凝集力の大きな低下はやはり認
められない。[0018] Furthermore, the above adhesive sheets can be applied to various adherends, and even when applied to adherends made of soft polyvinyl chloride containing a large amount of plasticizer, plasticization from the adherend can be avoided. Again, no significant decrease in cohesive force due to agent migration was observed.
【００１９】[0019]
【発明の効果】以上のように、本発明によれば、低温接
着性や粗面接着性などの接着力と凝集力とに共にすぐれ
、しかも貯蔵，保存に際しての制約を特に受けることの
ない、経時的安定性にすぐれた天然ゴム系の感圧性接着
剤とその接着テープ類を提供することができる。As described above, according to the present invention, the present invention has excellent adhesive strength such as low temperature adhesiveness and rough surface adhesiveness, as well as cohesive strength, and is not subject to any particular restrictions during storage or preservation. It is possible to provide a natural rubber-based pressure-sensitive adhesive with excellent stability over time and its adhesive tapes.
【００２０】[0020]
【実施例】つぎに、本発明の実施例を記載してより具体
的に説明する。なお以下、部とあるのは重量部を意味す
る。EXAMPLES Next, examples of the present invention will be described in more detail. In addition, hereinafter, parts mean parts by weight.
【００２１】実施例１
天然ゴム（マレーシア産の天然ゴム、ＳＭＲ）５０部と
スチレン−ブタジエン共重合ゴム〔日本ゼオン（株）製
のニツポール１５０２〕５０部とをブレンドし、さらに
これにスチレン−イソプレン−スチレンブロツク共重合
体〔シエル化学（株）製のクレイトン１１０７〕１０部
を加えて、ベースポリマーとした。Example 1 50 parts of natural rubber (Malaysian natural rubber, SMR) and 50 parts of styrene-butadiene copolymer rubber [Nitsupol 1502 manufactured by Nippon Zeon Co., Ltd.] were blended, and then styrene-isoprene was added to the mixture. - 10 parts of a styrene block copolymer (Krayton 1107, manufactured by Shell Chemical Co., Ltd.) was added to prepare a base polymer.
【００２２】このベースポリマー１１０部に対し、石油
系樹脂〔日本ゼオン（株）製のクレイトンＣ−１００〕
８０部を加え、固型分が１０重量％となるようにトルエ
ンに溶解混合して、感圧性接着剤溶液を調製した。[0022] For 110 parts of this base polymer, a petroleum resin [Krayton C-100 manufactured by Nippon Zeon Co., Ltd.] was added.
A pressure-sensitive adhesive solution was prepared by adding 80 parts and dissolving and mixing in toluene so that the solid content was 10% by weight.
【００２３】つぎに、上記の感圧性接着剤溶液を、厚さ
が２５μｍのポリエチレンテレフタレートフイルム上に
、乾燥後の厚さが３０μｍとなるように塗布，乾燥した
。その後、２０ｍｍ幅に裁断して、接着テープを作製し
た。Next, the above pressure-sensitive adhesive solution was applied onto a polyethylene terephthalate film having a thickness of 25 μm and dried to a thickness of 30 μm after drying. Thereafter, it was cut to a width of 20 mm to produce an adhesive tape.
【００２４】実施例２
天然ゴムの使用量を２０部、スチレン−ブタジエン共重
合ゴムの使用量を８０部、スチレン−イソプレン−スチ
レンブロツク共重合体の使用量を５部に、それぞれ変更
した以外は、実施例１と同様にして、感圧性接着剤溶液
の調製および接着テープの作製を行つた。Example 2 Except that the amount of natural rubber used was changed to 20 parts, the amount of styrene-butadiene copolymer rubber was changed to 80 parts, and the amount of styrene-isoprene-styrene block copolymer was changed to 5 parts. A pressure-sensitive adhesive solution and an adhesive tape were prepared in the same manner as in Example 1.
【００２５】実施例３
天然ゴムの使用量を８０部、スチレン−ブタジエン共重
合ゴムの使用量を２０部、スチレン−イソプレン−スチ
レンブロツク共重合体の使用量を５部に、それぞれ変更
した以外は、実施例１と同様にして、感圧性接着剤溶液
の調製および接着テープの作製を行つた。Example 3 Except that the amount of natural rubber used was changed to 80 parts, the amount of styrene-butadiene copolymer rubber was changed to 20 parts, and the amount of styrene-isoprene-styrene block copolymer was changed to 5 parts. A pressure-sensitive adhesive solution and an adhesive tape were prepared in the same manner as in Example 1.
【００２６】実施例４
天然ゴムに代えて、ポリイソプレンゴム〔（株）クラレ
製のクラプレンＩＲ１０〕５０部を使用した以外は、実
施例１と同様にして、感圧性接着剤溶液の調製および接
着テープの作製を行つた。Example 4 Preparation and bonding of a pressure-sensitive adhesive solution were carried out in the same manner as in Example 1, except that 50 parts of polyisoprene rubber [Kuraprene IR10 manufactured by Kuraray Co., Ltd.] was used in place of natural rubber. The tape was made.
【００２７】比較例１〜４
スチレン−イソプレン−スチレンブロツク共重合体の使
用を省いた以外は、実施例１〜４と同様にして、感圧性
接着剤溶液の調製および接着テープの作製を行つた。な
お、比較例１は実施例１に、比較例２は実施例２に、比
較例３は実施例３に、比較例４は実施例４に、それぞれ
対応している。Comparative Examples 1 to 4 Pressure-sensitive adhesive solutions and adhesive tapes were prepared in the same manner as Examples 1 to 4, except that the use of the styrene-isoprene-styrene block copolymer was omitted. . Note that Comparative Example 1 corresponds to Example 1, Comparative Example 2 corresponds to Example 2, Comparative Example 3 corresponds to Example 3, and Comparative Example 4 corresponds to Example 4.
【００２８】比較例５
スチレン−イソプレン−スチレンブロツク共重合体に代
えて、スチレン−ブタジエン−スチレンブロツク共重合
体〔シエル化学（株）製のクレイトン１１０１〕１０部
を用いた以外は、実施例１と同様にして、感圧性接着剤
溶液の調製および接着テープの作製を行つた。Comparative Example 5 Example 1 except that 10 parts of a styrene-butadiene-styrene block copolymer (Clayton 1101 manufactured by Schiel Kagaku Co., Ltd.) was used instead of the styrene-isoprene-styrene block copolymer. A pressure-sensitive adhesive solution and an adhesive tape were prepared in the same manner as described above.
【００２９】上記の実施例１〜４および比較例１〜５の
各感圧性接着剤溶液および接着テープにつき、以下の要
領で、粗面接着力、凝集力、貯蔵安定性および保存安定
性を調べた。これらの結果は、後記の表１に示されると
おりであつた。[0029] The rough surface adhesion, cohesive force, storage stability, and storage stability of each of the pressure-sensitive adhesive solutions and adhesive tapes of Examples 1 to 4 and Comparative Examples 1 to 5 above were examined in the following manner. . These results were as shown in Table 1 below.
【００３０】〈粗面接着力〉被着体として３６０番のサ
ンドペーパーを用い、このサンドペーパに各接着テープ
を貼り付け、常温で１時間放置したのち、接着テープを
剥がして、その接着力を調べた。<Adhesive strength on rough surfaces> Using No. 360 sandpaper as the adherend, each adhesive tape was attached to the sandpaper, left at room temperature for 1 hour, and then the adhesive tape was peeled off to examine its adhesive strength. .
【００３１】〈凝集力〉ポリ塩化ビニル１００部に対し
ジオクチルフタレートからなる可塑剤５０部を配合した
成形材料より、厚さが０．２ｍｍの軟質ポリ塩化ビニル
シートを作製し、これを被着体として、この上に各接着
テープを貼り付け、２４時間経過後に接着テープを剥が
し、可塑剤の移行による接着剤層の凝集破壊の有無を調
べた。評価は、被着体面への糊残りが多くて凝集破壊が
顕著に認められる場合を×、上記糊残りが僅かにみられ
て凝集破壊がやや生じている場合を△、上記糊残りが非
常に少なくて凝集破壊がほとんど認められない場合を○
、と判定した。<Cohesive force> A soft polyvinyl chloride sheet with a thickness of 0.2 mm is prepared from a molding material containing 50 parts of a plasticizer consisting of dioctyl phthalate to 100 parts of polyvinyl chloride, and this is used as an adherend. Each adhesive tape was pasted thereon, and the adhesive tape was peeled off after 24 hours to examine the presence or absence of cohesive failure of the adhesive layer due to migration of the plasticizer. The evaluation is: × when there is a lot of glue left on the surface of the adherend and cohesive failure is noticeable, △ when there is a slight amount of glue left and some cohesive failure occurs, and △ when there is a lot of glue left on the surface of the adherend and cohesive failure is noticeable. ○ If there is little cohesive failure and almost no cohesive failure is observed.
, it was determined.
【００３２】〈貯蔵安定性〉各感圧性接着剤溶液を常温
で５日間貯蔵したのち、目視により、溶解成分の分離状
態を観察し、凝集物が全面にみられるものを×、わずか
ながらに凝集物があるものを△、均一な溶液状態である
ものを○、と判定した。<Storage Stability> After storing each pressure-sensitive adhesive solution at room temperature for 5 days, visually observe the state of separation of dissolved components. The sample was graded as △ if there was a substance present, and the sample was graded as ◯ if the solution was in a uniform state.
【００３３】〈保存安定性〉各接着テープを０℃の低温
下で５日間保存したのち、感応により、粘着感の低下状
態を観察し、粘着感の低下の著しいものを×、わずかな
低下が認められるものを△、変化のみられないものを○
、と判定した。<Storage Stability> After storing each adhesive tape at a low temperature of 0° C. for 5 days, the state of decrease in adhesive feeling was observed by sensitivity. △ those that are recognized, ○ those that do not show any change
, it was determined.
【００３４】[0034]
【表１】[Table 1]
【００３５】上記表１の結果から明らかなように、本発
明の感圧性接着剤およびその接着テープは、粗面接着力
と凝集力とが共に大きく、しかも接着剤の貯蔵時や接着
テープの低温保存時にポリマー成分が分離することのな
い良好な経時的安定性を示すものであることがわかる。As is clear from the results in Table 1 above, the pressure-sensitive adhesive of the present invention and its adhesive tape have high rough surface adhesion and cohesive force, and moreover, the pressure-sensitive adhesive of the present invention and its adhesive tape have high adhesive strength and cohesive strength, and are also stable during storage of the adhesive and low-temperature storage of the adhesive tape. It can be seen that the polymer component exhibits good stability over time, with no separation of polymer components.
Claims (4)
プレンゴムと、ｂ）スチレン−ブタジエン共重合ゴムと
を、重量比が２／８〜８／２となる割合でブレンドし、
これにさらにｃ）スチレン−イソプレン−スチレンブロ
ツク共重合体を加えて、ベースポリマーを構成させたこ
とを特徴とする感圧性接着剤。1. Blend a) natural rubber and/or polyisoprene rubber and b) styrene-butadiene copolymer rubber at a weight ratio of 2/8 to 8/2,
A pressure-sensitive adhesive characterized in that c) a styrene-isoprene-styrene block copolymer is further added thereto to constitute a base polymer.
のスチレン−イソプレン−スチレンブロツク共重合体の
割合が４〜５０重量％である請求項１に記載の感圧性接
着剤。2. The pressure-sensitive adhesive according to claim 1, wherein the proportion of the styrene-isoprene-styrene block copolymer as the c component is 4 to 50% by weight in the total amount of the three components a, b, and c.
載の感圧性接着剤が設けられてなる接着シート類。3. Adhesive sheets comprising the pressure-sensitive adhesive according to claim 1 or 2 provided on a base material.
る請求項３に記載の接着シート類。4. The adhesive sheets according to claim 3, wherein the material of the base material is soft polyvinyl chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3156275A JP3007717B2 (en) | 1991-04-04 | 1991-04-04 | Pressure sensitive adhesives and their adhesive sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3156275A JP3007717B2 (en) | 1991-04-04 | 1991-04-04 | Pressure sensitive adhesives and their adhesive sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04309584A true JPH04309584A (en) | 1992-11-02 |
| JP3007717B2 JP3007717B2 (en) | 2000-02-07 |
Family
ID=15624253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3156275A Expired - Lifetime JP3007717B2 (en) | 1991-04-04 | 1991-04-04 | Pressure sensitive adhesives and their adhesive sheets |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3007717B2 (en) |
-
1991
- 1991-04-04 JP JP3156275A patent/JP3007717B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3007717B2 (en) | 2000-02-07 |
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