JPS588433B2 - Water-soluble and heat-melting adhesive - Google Patents
Water-soluble and heat-melting adhesiveInfo
- Publication number
- JPS588433B2 JPS588433B2 JP2213775A JP2213775A JPS588433B2 JP S588433 B2 JPS588433 B2 JP S588433B2 JP 2213775 A JP2213775 A JP 2213775A JP 2213775 A JP2213775 A JP 2213775A JP S588433 B2 JPS588433 B2 JP S588433B2
- Authority
- JP
- Japan
- Prior art keywords
- pva
- water
- adhesive
- polymerization
- peg
- 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.)
- Expired
Links
- 239000000853 adhesive Substances 0.000 title claims description 29
- 230000001070 adhesive effect Effects 0.000 title claims description 29
- 238000002844 melting Methods 0.000 title claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 33
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 33
- 229920001223 polyethylene glycol Polymers 0.000 claims description 22
- 238000006116 polymerization reaction Methods 0.000 claims description 21
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 claims description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000002156 mixing Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 230000008018 melting Effects 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical group CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229920002689 polyvinyl acetate Polymers 0.000 description 5
- 239000011118 polyvinyl acetate Substances 0.000 description 5
- 239000000155 melt Substances 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000007127 saponification reaction Methods 0.000 description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 3
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 3
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000600 sorbitol Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
【発明の詳細な説明】
本発明は水溶性かつ熱溶融性（ホットメルト型）接着剤
として使用可能なポリビニルアルコール（以下ＰＶＡと
略記する）系接着剤を提供するものであり、本発明の接
着剤は、たとえばホットメルト接着する段ボールのはり
合わせ、製本用等をはじめとし、溶融塗布後再湿接着す
る切手、封筒、テープなどの用途に広範囲に有効に利用
し得るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a polyvinyl alcohol (hereinafter abbreviated as PVA) adhesive that can be used as a water-soluble and heat-melt adhesive. The agent can be effectively used in a wide range of applications, including hot-melt bonding of corrugated boards, bookbinding, etc., as well as postage stamps, envelopes, tapes, etc., which are melt-applied and re-wet bonded.
すなわち本発明は平均重合度５０〜３００残存酢酸基１
５〜７０モル％のＰＶＡと分子量が２００〜１６００の
ポリエチレングリコール（以下ＰＥＧと略記する）とか
らなる水溶性かつ熱溶融性を有する接着剤およびその製
造法に関するものである。That is, the present invention has an average degree of polymerization of 50 to 300 and a residual acetate group of 1.
The present invention relates to a water-soluble and heat-melting adhesive comprising 5 to 70 mol% of PVA and polyethylene glycol (hereinafter abbreviated as PEG) having a molecular weight of 200 to 1,600, and a method for producing the adhesive.
従来、ＰＶＡが水溶性の接着剤として使用されているこ
とはよく知られているところである。It is well known that PVA has been used as a water-soluble adhesive.
すなわちＰＶＡは構造単位である水酸基の強力な水素結
合を持つため一般に熱溶融せず、分子間水素結合を切断
するため、溶剤または融剤として水が使用されている。That is, since PVA has strong hydrogen bonds between its structural units, hydroxyl groups, it generally does not melt under heat, and water is used as a solvent or flux to break the intermolecular hydrogen bonds.
この場合、接着剤塗布後、乾燥工程が必要であり、その
ためにその用途が限定されていた。In this case, a drying step is required after applying the adhesive, which limits its use.
一方、近年有機溶剤タイプの接着剤は有機溶剤の公害性
から使用されにくくなり、これに代わってエチレンー酢
酸ビニル共重合体に代表されるホットメルト型接着剤が
主流をしめるようになってきた。On the other hand, in recent years, organic solvent type adhesives have become difficult to use due to the pollution nature of organic solvents, and in their place hot melt type adhesives, typified by ethylene-vinyl acetate copolymers, have become mainstream.
しかしこの場合、エチレンー酢酸ビニル共重合体は水に
不溶であるため、たとえばこれで接着した故紙を再生す
るとき、水中で分散しないため大きな障害となり、単な
るホットメルト型の接着剤もその用途に限界があった。However, in this case, the ethylene-vinyl acetate copolymer is insoluble in water, so when recycling waste paper that has been bonded with it, for example, it will not disperse in water, which will be a major obstacle, and even simple hot-melt adhesives will have limited applications. was there.
最近、ポリビニルアルコール系、ホットメルト接着剤と
して特公昭４９−９６１１にＰＶＡとペンタエリスリ｝
−ルの混合物を加熱溶融することが報告されているが、
ペンタエリスリトールを混合したＰＶＡ樹脂は硬く、も
ろく、可撓性がきわめて悪いことおよび加熱溶融時に揮
発分が多く、熱安定性が悪いために、接着部分が硬くな
ったり、折り曲げると接着破壊が起こったりして実用上
多くの問題を残していた。Recently, polyvinyl alcohol-based hot melt adhesives, PVA and pentaerythri
It has been reported that heating and melting a mixture of
PVA resin mixed with pentaerythritol is hard, brittle, and has extremely poor flexibility. It also contains a large amount of volatile matter when heated and melted, and has poor thermal stability, resulting in hard bonded parts and adhesive failure when bent. This left many practical problems.
本発明者らは従来の欠点を改良すべく鋭意研究した結果
、熱溶融性かつ水溶性あるいは水分散性を有する新規な
ＰＶＡに特定のＰＥＧを加えて溶融混合する本発明に到
達したのであり、本発明の接着剤は、水溶性かつ熱溶融
性がすぐれ、さらに実用面で障害となる可撓性を著しく
改良したものである。As a result of intensive research to improve the conventional drawbacks, the present inventors have arrived at the present invention, in which a specific PEG is added and melt-mixed to a new PVA that is heat-meltable and water-soluble or water-dispersible. The adhesive of the present invention has excellent water solubility and heat meltability, and has significantly improved flexibility, which is an obstacle in practical use.
本発明に使用するＰＶＡは平均重合度５０以上、３００
以下で、その残存酢酸基が１５〜７０モル％のものが適
しているが、特に平均重合度６０〜２００、残存酢酸基
２５〜５０モル％のものが最適である、ＰＶＡの平均重
合度が３００をこえると接着剤の溶融温度、溶融粘度が
高くなり、作業性が低下するので本発明の目的に不適当
である。The PVA used in the present invention has an average polymerization degree of 50 or more, 300
In the following, PVA with a residual acetic acid group of 15 to 70 mol% is suitable, but an average degree of polymerization of 60 to 200 and a residual acetic acid group of 25 to 50 mol% are particularly optimal. If it exceeds 300, the melting temperature and melt viscosity of the adhesive will increase and workability will decrease, making it unsuitable for the purpose of the present invention.
一方、平均重合度が５０未満であると熱に安定なＰＶＡ
を製造することが困難であり接着力も著しく低下するの
で望ましくない。On the other hand, if the average degree of polymerization is less than 50, PVA is stable to heat.
This is undesirable because it is difficult to manufacture and the adhesive strength is significantly reduced.
次にＰＶＡ中の残存酢酸基が１５モル％未満であると最
終の接着剤の溶融温度、溶融粘度が高く作業性が低下し
、また可塑剤との混合性が低下するだけでなく可塑剤の
表面へのにじみ出しが起こり、接着力が低下するうえ、
さらに、常温下の接着剤はもろくなり可撓性に欠けるよ
うになるので不適当である。Next, if the residual acetic acid group in PVA is less than 15 mol%, the melting temperature and melt viscosity of the final adhesive will be high and workability will be reduced, and the miscibility with the plasticizer will be reduced as well. Bleeding onto the surface occurs, reducing adhesive strength, and
Furthermore, adhesives at room temperature become brittle and lack flexibility, making them unsuitable.
これらの性質は残存酢酸基の増加につれ改善されるが７
０モル％こえると、組成物の水溶性あるいは水分散性が
失われるため本発明の目的に適応しない。These properties improve as the amount of residual acetate groups increases, but 7
If it exceeds 0 mol%, the water solubility or water dispersibility of the composition will be lost, and the composition will not be suitable for the purpose of the present invention.
上記の理由により、本発明に使用するＰＶＡとしては平
均重合度５０以上、３００以下、残存酢酸基が１５〜７
０モル％のものであることが必要であり、特に平均重合
度６０〜２００、残存酢酸基２５〜５０モル％のＰＶＡ
が望ましい。For the above reasons, the PVA used in the present invention has an average degree of polymerization of 50 or more and 300 or less, and a residual acetate group of 15 to 7.
PVA with an average polymerization degree of 60 to 200 and a residual acetic acid group of 25 to 50 mol% is required.
is desirable.
本発明に適用するＰＶＡは、たとえば重合時の温度のも
とで２０Ｘ１０−４以上の連鎖移動定数をもつアルコー
ル類中で酢酸ビニルを平均重合度５０〜３００、に重合
し、加熱下に溶剤を追い跡したのちポリ酢酸ビニルを無
水メタノールに混合溶解し、アルカリを加えて脱酢酸化
することにより容易に製造することができる。PVA applied to the present invention can be obtained by polymerizing vinyl acetate to an average degree of polymerization of 50 to 300 in an alcohol having a chain transfer constant of 20X10-4 or more at the polymerization temperature, and then removing the solvent while heating. After tracking, polyvinyl acetate can be easily produced by mixing and dissolving polyvinyl acetate in anhydrous methanol and adding an alkali to deacetate the mixture.
次に本発明に使用するＰＥＧはその分子量が２００以上
、１６００以下のものであることが必要である。Next, the PEG used in the present invention needs to have a molecular weight of 200 or more and 1,600 or less.
従来、ＰＥＧがＰＶＡの可塑剤として用いられることは
ＰＶＡの半溶融紡糸、あるいはフイルム成型などでよく
知られているが、いずれの場合も水との共存下に使用さ
れている。Conventionally, it is well known that PEG is used as a plasticizer for PVA in semi-melt spinning of PVA or film molding, but in both cases it is used in the coexistence of water.
本発明では水を使用せず上記特定範囲の分子量のＰＥＧ
を融剤として用いていることが特徴である。In the present invention, water is not used and PEG having a molecular weight within the above specific range is used.
It is characterized by using as a fluxing agent.
ＰＥＧの分子量が２００未満であると溶融時の揮発分が
多くなり、本発明の目的には不適当であり、分子量が１
６００をこえるとＰＶＡとの混合性が悪くなり、また溶
融粘度も高くなるので好ましくない。If the molecular weight of PEG is less than 200, the volatile content during melting will increase, making it unsuitable for the purpose of the present invention.
If it exceeds 600, the miscibility with PVA will deteriorate and the melt viscosity will also increase, which is not preferable.
第１表に平均重合度２００、残存酢酸基３５モル％のＰ
ＶＡに対し、分子量の異なるＰＥＧを２５重量％添加、
溶融混合した接着剤の性能を比較して示した。Table 1 shows P with an average degree of polymerization of 200 and a residual acetate group of 35 mol%.
Adding 25% by weight of PEG with different molecular weight to VA,
The performance of melt-blended adhesives is shown in comparison.
第１表から、ＰＥＧの分子量としては２００〜１６００
の範囲のものが適当であることがわかる。From Table 1, the molecular weight of PEG is 200 to 1600.
It can be seen that a range of .
次にＰＥＧの添加量であるが、一般にＰＶＡの平均重合
度が高くなるほど増加する必要がある。Next, regarding the amount of PEG added, it is generally necessary to increase it as the average degree of polymerization of PVA increases.
適当な量としてはＰＶＡに対し、
重量％（ただし、数値が負となる場合は０以上）の平均
重合度）が望ましい。A suitable amount is preferably an average degree of polymerization of % by weight (however, if the value is negative, the average degree of polymerization is 0 or more) based on PVA.
ＰＶＡの平均重合度が１２５以下の場合にはＰＶＡ自身
で容易に溶融するのでＰＥＧの添加がなくてもよいが、
上記範囲内でＰＥＧを添加する方が接着剤の溶融粘度、
可撓性からみてよりすぐれている。If the average degree of polymerization of PVA is 125 or less, the PVA itself will easily melt, so there is no need to add PEG.
Adding PEG within the above range reduces the melt viscosity of the adhesive.
It is superior in terms of flexibility.
この範囲以上にＰＥＧを添加すると接着剤よりＰＥＧが
プリードしたりまた接着性が悪くなるので好ましくない
。If PEG is added in an amount exceeding this range, the PEG may lead to the adhesive or the adhesiveness may deteriorate, which is not preferable.
次に、平均重合度２００、残存酢酸基３５モル％のＰＶ
Ａにワックス状の固体であるＰＥＧＩＯＯＯ（分子量９
５０〜１０５０）の量を変えて添加して得られた溶融接
着剤と同じく常温下で固体状の可塑剤であるペンタエリ
スリトールおよびソルビトールを加えて得られた溶融接
着剤の性質を比較して第２表に示した。Next, PV with an average degree of polymerization of 200 and a residual acetic acid group of 35 mol%
PEGIOOO (molecular weight 9
We compared the properties of molten adhesives obtained by adding pentaerythritol and sorbitol, which are solid plasticizers at room temperature, with the properties of molten adhesives obtained by adding varying amounts of 50 to 1050). It is shown in Table 2.
第２表からＰＥＧの添加量（ＰＡ／１００×８−１０）
重量％以上、（ＰＡ／１００Ｘ８＋２５）重量％（ＰＡ
はＰＶＡの平均重合度）以下の範囲が適当であることが
わかる。From Table 2, the amount of PEG added (PA/100 x 8-10)
Weight% or more, (PA/100X8+25) weight% (PA
is the average degree of polymerization of PVA).
また同じ固体状の可塑剤であってもペンタエリスリトー
ル、ソルビトールにくらべＰＥＧの方が顕著にすぐれて
いることも明らかである。It is also clear that PEG is significantly superior to pentaerythritol and sorbitol even though they are solid plasticizers.
本発明の接着剤は、使用ＰＶＡの選択により水または温
水に容易に溶解せしめることができることはいうまでも
ない。It goes without saying that the adhesive of the present invention can be easily dissolved in water or hot water depending on the PVA used.
本発明の接着剤はＰＶＡとＰＥＧを混合して得られるも
のであるが混合方法は溶融混合が特に望ましい。The adhesive of the present invention is obtained by mixing PVA and PEG, and melt mixing is particularly preferred as the mixing method.
溶融混合はＰＶＡを溶融して溶融状態でＰＥＧと混合し
てもよいし、あらかじめ混合し、さらに溶融して混合を
より完全にしてもよいが、いずれにしても溶融状態での
混合工程を経ることが望ましい。Melt mixing can be done by melting PVA and mixing it with PEG in a molten state, or by mixing it in advance and melting it further to make the mixing more complete, but in either case, the mixing process is done in a molten state. This is desirable.
たとえば重合度の低い高残酢ＰＶＡは水溶性であると同
時にメタノールにも膨潤あるいは溶解するので、このよ
うなＰＶＡをケン化後のスラリーから分離することなく
上記範囲内のＰＥＧを該ＰＶＡスラリーに加えたのち、
メタノールおよびケン化で生成した酢酸メチルを留去し
、ほとんど留出しなくなってから、加熱温度を徐々に上
昇しても本発明は達成される。For example, high residual vinegar PVA with a low degree of polymerization is water-soluble and at the same time swells or dissolves in methanol, so PEG within the above range can be added to the PVA slurry without separating such PVA from the saponified slurry. After adding
The present invention can also be achieved by distilling off methanol and methyl acetate produced by saponification and gradually increasing the heating temperature after almost no distillation occurs.
この場合組成により変化するが１４０〜１８０℃で溶融
押出し、適当な大きさのチップにすることができ、しか
もこの方法は工業的に最も有利である。In this case, chips of an appropriate size can be obtained by melt extrusion at 140 to 180° C., depending on the composition, and this method is industrially most advantageous.
本発明の接着剤はその特徴である水溶性かつホットメル
ト性を損うことがなければ他の熱溶融性樹脂、たとえば
エチレンー酢酸ビニル共重合樹脂など、および熱安定剤
、光安定剤、顔料、増量剤などを加えてもよいことはい
うまでもない。The adhesive of the present invention may contain other heat-melting resins such as ethylene-vinyl acetate copolymer resin, heat stabilizers, light stabilizers, pigments, It goes without saying that a filler or the like may be added.
次に実施例をあげて本発明をさらに詳しく説明する。Next, the present invention will be explained in more detail with reference to Examples.
実施例 １
平均重合度２００、残存酢酸基３５モル％のＰＶＡＩＯ
Ｏ重量部に対し、分子量４００の液状ＰＥＧを２５重量
部加え、１８０℃で溶融混合した。Example 1 PVAIO with average degree of polymerization of 200 and residual acetic acid group of 35 mol%
25 parts by weight of liquid PEG having a molecular weight of 400 was added to parts by weight of O, and the mixture was melt-mixed at 180°C.
このようにして得られた接着剤を環球法で測定した軟化
点は１５３℃であり、１７０℃付近では完全に溶融し、
接着性、可撓性ともに良好であった。The softening point of the thus obtained adhesive measured by the ring and ball method was 153°C, and it completely melted at around 170°C.
Both adhesiveness and flexibility were good.
また溶融加熱時の揮発分も少なかった。この接着剤は２
０〜３０℃の水に完全に溶解した。In addition, the volatile content during melting and heating was also small. This adhesive is 2
Completely dissolved in water at 0-30°C.
実施例 ２
平均重合度１２４のポリ酢酸ビニルの４０重量％メタノ
ール溶液に１／５００当量の水酸化ナ卜リウムのメタノ
ール溶液を加え、４０℃でケン化した。Example 2 A methanol solution of 1/500 equivalent of sodium hydroxide was added to a 40% by weight methanol solution of polyvinyl acetate having an average degree of polymerization of 124, and the mixture was saponified at 40°C.
析出したゲル状のＰＶＡを容器から取り出し、メタノー
ルおよびケン化で生成した酢酸メチルを減圧下に加熱し
て蒸発させた。The precipitated gel-like PVA was taken out from the container, and methanol and methyl acetate produced by saponification were heated under reduced pressure to evaporate.
得られたＰＶＡは平均重合度１２１、残存酢酸基３７．
６モル％であった。The obtained PVA had an average degree of polymerization of 121 and a residual acetate group of 37.
It was 6 mol%.
このＰＶＡＩＯＯ重量部に分子量約１０００のワックス
状ＰＥＧを２５重量部加え、１６０℃で溶融混合した。25 parts by weight of waxy PEG having a molecular weight of about 1000 was added to parts by weight of this PVAIOO, and the mixture was melt-mixed at 160°C.
このようにして得られた接着剤は非常に柔軟であり、環
球法による軟化点は１４８℃、１８０℃の溶融粘度は５
０ポイズ、溶融時の揮発分はほとんどなかった。The adhesive thus obtained is very flexible, with a softening point of 148°C by the ring and ball method and a melt viscosity of 5.
0 poise, there was almost no volatile matter during melting.
また水溶性も非常によく１０〜２０℃の水に完全に溶解
した。It also has very good water solubility and completely dissolves in water at 10-20°C.
実施例 ３
平均重合度５６のポリ酢酸ビニルの４４重量％のメタノ
ール溶液に、４０℃で１／５００当量の水酸化ナトリウ
ムのメタノール溶液を加え、ケン化した。Example 3 To a 44% by weight methanol solution of polyvinyl acetate having an average degree of polymerization of 56, a methanol solution of 1/500 equivalent of sodium hydroxide was added at 40° C. and saponified.
ケン化終了後、最初の仕込みポリ酢酸ビニルの重量に対
し、分子量６００のＰＥＧを１０重量部、メルト・イン
デックス４００のエチレンー酢酸ビニル共重合体樹脂を
１５重量部加え、かきまぜなから８０℃でメタノールお
よびケン化で生成した酢酸メチルを留去した。After saponification, add 10 parts by weight of PEG with a molecular weight of 600 and 15 parts by weight of ethylene-vinyl acetate copolymer resin with a melt index of 400 to the weight of the initially charged polyvinyl acetate, and add methanol at 80°C without stirring. And methyl acetate produced by saponification was distilled off.
留出量が減少するにつれ、加熱温度を上昇していくと１
６０℃で揮発分がほとんどなくなり、均一な溶融混合物
が得られた。As the distillate amount decreases, as the heating temperature increases, 1
At 60° C., the volatile content was almost completely eliminated and a homogeneous molten mixture was obtained.
このようにして得られた接着剤は１５０℃で完全に溶融
し、接着性、可撓性ともに良好で、３０℃の水に完全か
つ容易に分散溶解した。The adhesive thus obtained completely melted at 150°C, had good adhesiveness and flexibility, and was completely and easily dispersed and dissolved in water at 30°C.
Claims (1)
ル％のポリビニルアルコールと分子量２００〜１６００
のポリエチレングリコールとからなる水溶性かつ熱溶融
性を有する接着剤。1 Polyvinyl alcohol with an average degree of polymerization of 50 to 300 and a residual acetic acid group of 15 to 70 mol% and a molecular weight of 200 to 1600
A water-soluble and heat-melting adhesive consisting of polyethylene glycol.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2213775A JPS588433B2 (en) | 1975-02-21 | 1975-02-21 | Water-soluble and heat-melting adhesive |
| DE19762603648 DE2603648A1 (en) | 1975-01-31 | 1976-01-30 | WATER-SOLUBLE OR DISPERSIBLE MELT ADHESIVES AND METHOD FOR THEIR PRODUCTION |
| FR7602782A FR2299388A1 (en) | 1975-01-31 | 1976-02-02 | Water-soluble or -dispersible hot melt adhesives - contg partially hydrolysed polyvinyl acetate, plasticiser and ethylene-vinyl acetate copolymer |
| US05/851,319 US4140668A (en) | 1975-01-31 | 1978-11-14 | Water soluble or water dispersible hot-melt adhesive compositions based on polyvinyl alcohol with residual acetate groups and process for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2213775A JPS588433B2 (en) | 1975-02-21 | 1975-02-21 | Water-soluble and heat-melting adhesive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5196831A JPS5196831A (en) | 1976-08-25 |
| JPS588433B2 true JPS588433B2 (en) | 1983-02-16 |
Family
ID=12074488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2213775A Expired JPS588433B2 (en) | 1975-01-31 | 1975-02-21 | Water-soluble and heat-melting adhesive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS588433B2 (en) |
-
1975
- 1975-02-21 JP JP2213775A patent/JPS588433B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5196831A (en) | 1976-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3574153A (en) | Water remoistenable hot melt adhesive compositions comprising mixtures of water soluble polymers with acid hydrolyzed polyvinyl acetate | |
| TWI898031B (en) | Uv-curable semi-structural adhesive, and uv-curable semi-structural adhesive tape | |
| US4365041A (en) | Resin composition comprising water-soluble polyamide and vinyl alcohol-based polymer | |
| JPH03149280A (en) | Adhesively applicable article provided with moisture activated heat meltable adhesive sheet | |
| US20020151628A1 (en) | Aqueous adhesive formulations | |
| KR20120074954A (en) | Composition of the eco-friendly hot melt adhesive | |
| CA2124021A1 (en) | Adhesive for labels and the like | |
| CN116285225A (en) | Epoxy resin composition for solar cell assembly and solar cell | |
| CA1184339A (en) | Thermosetting adhesive composition including epoxy resin and half ester product of saponified ethylene/ vinyl acetate copolymer with a dicarboxylic acid | |
| US2443613A (en) | Polyethylene isopropylene sebacate adhesive compositions and methods and articles utilizing them | |
| US4129539A (en) | Hot melt adhesives for cellulosic material | |
| JPS588433B2 (en) | Water-soluble and heat-melting adhesive | |
| JPS5810438B2 (en) | Polyvinyl alcohol silicone hot melt | |
| JPH11323305A (en) | Water-soluble hot-melt adhesive | |
| CN112662342A (en) | Modified asphalt interface adhesive and preparation method thereof | |
| JPS6113488B2 (en) | ||
| US3444125A (en) | Moistenable,hot melt adhesives comprising random vinyl alcohol/vinyl ester copolymers | |
| JPS58225173A (en) | Aqueous adhesive composition | |
| JPH09272855A (en) | Water-resistant adhesive for lignocellulose or material containing the same | |
| JPS5936957B2 (en) | Rewet hot melt adhesive composition | |
| JP3342910B2 (en) | Hot melt composition | |
| JPS5823867A (en) | Remoistening hot-melt adhesive composition | |
| JPS588434B2 (en) | Water-soluble and heat-melting polyvinyl alcohol adhesive | |
| JP2554928B2 (en) | Hot melt adhesive composition and method for producing the same | |
| JPH04145182A (en) | Adhesive for flooring |