JPH0214945B2 - - Google Patents
Info
- Publication number
- JPH0214945B2 JPH0214945B2 JP17806781A JP17806781A JPH0214945B2 JP H0214945 B2 JPH0214945 B2 JP H0214945B2 JP 17806781 A JP17806781 A JP 17806781A JP 17806781 A JP17806781 A JP 17806781A JP H0214945 B2 JPH0214945 B2 JP H0214945B2
- Authority
- JP
- Japan
- Prior art keywords
- discoloration
- formalin
- parts
- adhesive
- paulownia
- 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
- 230000001070 adhesive effect Effects 0.000 claims description 31
- 239000000853 adhesive Substances 0.000 claims description 29
- 238000002845 discoloration Methods 0.000 claims description 28
- 239000000839 emulsion Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 8
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 7
- 239000011118 polyvinyl acetate Substances 0.000 claims description 7
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 7
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 7
- 239000003112 inhibitor Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 235000010265 sodium sulphite Nutrition 0.000 claims description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 42
- 244000055346 Paulownia Species 0.000 description 15
- 235000013312 flour Nutrition 0.000 description 7
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000011120 plywood Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 241000209140 Triticum Species 0.000 description 3
- 235000021307 Triticum Nutrition 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229920001342 Bakelite® Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 240000007049 Juglans regia Species 0.000 description 1
- 235000009496 Juglans regia Nutrition 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は接着組成物、就中桐化粧単板、所謂桐
突板を合板に接着し、化粧性を付与する桐化粧板
用の接着に好適な防変色性接着組成物に関する。
従来、桐化粧合板の接着等変色を厭う用途に供
する接着剤として酢酸ビニル系エマルジヨン、ユ
リア樹脂、小麦粉の配合物が多用されている。し
かしながらユリア―ホルマリン系樹脂を使用する
と、経日安定性が悪く、樹脂の分解に起因するホ
ルマリンの発生という問題がある。そして家具の
部材から発生したホルマリンは、収納した衣類等
へ移行付着し、これがため甚だしい場合には、衣
類等で規制されているホルマリン量を上廻つてし
まうことになり、近年家具部材についてもホルマ
リンの規制が行なわれつつある。
このため発生したホルマリンを吸収するために
尿素、メラミン等の所謂ホルマリンキヤツチヤー
剤を配合する試みがなされている。しかしこのよ
うなホルマリンキヤツチヤー剤を配合した接着剤
を用いて例えば桐の突板を接着すると、ホルマリ
ンの発生量は減少するが、桐の白色面が桃色乃至
赤色に発色してしまうことがある。一方ホルマリ
ンを発生しないような接着剤を用いる方法もある
が、これらの接着剤例えばポリ酢酸ビニル系エマ
ルジヨンを使用した場合にはこの変色が特に激し
い。
この変色は湿度の高い梅雨期に著るしく材質な
どによつて程度が異なる。この赤色変化は桐の美
しさを大きく減じてしまい化粧材としての役を果
たさないものにしてしまう。
変色を防ぐ方法として種々の接着剤を配合した
り、材質の含水率をコントロールしたり、接着後
の被接着材中の水分を気散させるために乾燥装置
をもうけたり、場合によつては漂白工程をもうけ
る等の方法が提案されているが、これら既存の方
法では満足できるような結果が得られていない。
本発明者らは上述の諸問題点に鑑み防変色性接
着組成物に就いて鋭意研究を続けた結果本発明を
完成したものであり、その目的とするところは、
被接着剤の変色を防止すると共にホルマリンが発
生せず、しかも作業上何ら特別の工夫を必要とす
ることなく、優れた接着効果を有する防変色性接
着組成物を提供するにある。上述の目的はポリ酢
酸ビニル系エマルジヨンに還元性変色防止剤を配
合してなる防変色性接着組成物により達成され
る。
本発明におけるポリ酢酸ビニル系エマルジヨン
とは酢酸ビニルを主成分とする重合体の水性分散
液であつて、酢酸ビニルと共重合可能なモノマ
ー、例えばエチレン、アクリル酸、アクリル酸エ
ステル類、メタクリル酸、メタクリル酸エステル
類、塩化ビニル、イタコン酸、クロトン酸、マレ
イン酸、マレイン酸エステル類、２―ヒドロキシ
エチルアクリレート、Ｎ―メチロールアクリルア
ミド、Ｎ―メチロールアクリルアミドのエーテル
化物等との共重合体の水性分散液であつても良
い。
又、本発明に係る還元性変色防止剤としては例
えば亜硫酸ナトリウム、次亜硫酸ナトリウムなど
の亜硫酸塩類、二酸化イオウ、チオ硫酸ナトリウ
ムなどのチオ硫酸塩類、塩化第二錫、ロンガリツ
トなどが挙げられる。これら還元性変色防止剤の
量は酢酸ビニル系エマルジヨン100重量部に対し
１〜10重量部の範囲で添加するのが好適である。
還元性変色防止剤の量が１重量部未満では桐の変
色防止効果に乏しく、10重量部を上廻ると、エマ
ルジヨンの安定性を悪くし、エマルジヨンの破壊
や、経時での粗粒子の発生、酢酸ビニルのケン化
反応などを生じたり、更に、接着力の低下をもた
らす。そして上記還元性変色防止剤中では、酢酸
ビニル系エマルジヨン接着剤への混和性、経時の
安定性等を考慮するとチオ硫酸ナトリウム、亜硫
酸ナトリウム、ロンガリツトが特に好適である。
これらは単独で使用してもよいし、適宜混合して
使用しても良い。
このようにして製造した接着剤を用いて、例え
ば桐の突板を接着するに際しては、特別の配慮
や、工夫は必要なく、そのまま接着に供すればよ
く、桐の突板の含水率の制御、材質や季節による
配合の変化などの煩雑な工程を一切必要としな
い。
更に本発明の接着組成物を使用するにあたり、
アクリル共重合エマルジヨン、SBR、NBR等の
合成ゴムエマルジヨンを一部混合したり、増量剤
として小麦粉、でんぷん、脱脂大豆粉などを使用
することもできる。又クレー、カオリン、タル
ク、木粉、くるみ粉などを増量充填用に供しても
良い。これらはエマルジヨンに対し高々200重量
％の範囲で使用できる。
また本発明接着組成物にホルマリン系縮合樹脂
を添加することも可能であるが、ホルマリンの発
生をできる限り少なくなるようにするため、量を
少なくするか又はホルマリンの吸収剤を添加して
おくことが好ましい。この場合エマルジヨンに対
し、高々30重量％の範囲が好ましい。更に本発明
接着組成物の作業上でのオープンタイム、クロー
ズドタイムの調整のためのエチレングリコール、
ジエチレングリコール、グリセリン等の多価アル
コールを添加することも可能である。
本発明に係る接着組成物は、被接着材に変色を
起こすことがなく、優れた接着効果を有し、ホル
マリンの発生も皆無である。特に本発明接着剤を
桐突板化粧板の製造に供した場合、その特長が一
層顕著に発揮される。即ち桐の化粧性を低下させ
てしまう、桃色乃至赤色への変色を一切生起する
ことなく、著しく化粧性が向上した化粧板を製造
できる。
以下に実施を挙げて本発明を具体的に説明す
る。
実施例 １
ヨドゾールES―07（カネボウエヌエスシー(株)社
製ポリ酢酸ビニルホモポリマーエマルジヨン）に
下記第１表に示す添加物を所定量加え、含水率約
20％の0.16mmの桐の突板を2.7mm準無臭合板に、
下記条件にて接着した後、直ちにポリエチレン袋
中に入れて空気を含んだまゝ密封して放置し、変
色を観察した。結果を第１表に示す。
接着条件：
塗布量 100g／m2
プレス 110℃ホツトプレス40秒
The present invention relates to an adhesive composition, particularly a color-proof adhesive composition suitable for adhering a decorative paulownia veneer, a so-called paulownia veneer, to a plywood and imparting decorative properties to the plywood. Conventionally, blends of vinyl acetate emulsion, urea resin, and wheat flour have been frequently used as adhesives for applications where discoloration is undesirable, such as adhesion of decorative paulownia plywood. However, when a urea-formalin resin is used, there is a problem of poor stability over time and generation of formalin due to decomposition of the resin. Formalin generated from furniture components migrates and adheres to stored clothing, etc., and in severe cases, the amount of formalin that is regulated for clothing, etc. can be exceeded.In recent years, formalin has also been applied to furniture components. Regulations are being implemented. For this reason, attempts have been made to incorporate so-called formalin capture agents such as urea and melamine in order to absorb the generated formalin. However, when paulownia veneers are bonded using an adhesive containing such a formalin-catching agent, for example, the amount of formalin generated is reduced, but the white surface of the paulownia may turn pink or red. . On the other hand, there is a method of using adhesives that do not generate formalin, but when these adhesives, such as polyvinyl acetate emulsion, are used, this discoloration is particularly severe. This discoloration is noticeable during the rainy season when humidity is high, and the degree of discoloration varies depending on the material and other factors. This red change greatly reduces the beauty of paulownia, making it useless as a decorative material. Methods to prevent discoloration include blending various adhesives, controlling the moisture content of the material, installing a drying device to diffuse moisture in the material after bonding, and in some cases bleaching. Methods such as adding additional steps have been proposed, but these existing methods have not yielded satisfactory results. In view of the above-mentioned problems, the present inventors have completed the present invention as a result of diligent research into color-proofing adhesive compositions, and the purpose thereof is to:
To provide a discoloration-proof adhesive composition which prevents discoloration of an adhesive, does not generate formalin, and has an excellent adhesive effect without requiring any special measures in operation. The above object is achieved by a discoloration-proof adhesive composition comprising a polyvinyl acetate emulsion mixed with a reducing discoloration inhibitor. The polyvinyl acetate emulsion in the present invention is an aqueous dispersion of a polymer mainly composed of vinyl acetate, and includes monomers copolymerizable with vinyl acetate, such as ethylene, acrylic acid, acrylic esters, methacrylic acid, Aqueous dispersions of copolymers with methacrylic acid esters, vinyl chloride, itaconic acid, crotonic acid, maleic acid, maleic esters, 2-hydroxyethyl acrylate, N-methylolacrylamide, etherified N-methylolacrylamide, etc. It's okay to be. Examples of the reductive discoloration inhibitor according to the present invention include sulfites such as sodium sulfite and sodium hyposulfite, thiosulfates such as sulfur dioxide and sodium thiosulfate, tin chloride, and Rongalit. The amount of these reducing discoloration inhibitors added is preferably in the range of 1 to 10 parts by weight per 100 parts by weight of the vinyl acetate emulsion.
If the amount of the reducing discoloration inhibitor is less than 1 part by weight, the effect of preventing the discoloration of paulownia wood will be poor, and if it exceeds 10 parts by weight, the stability of the emulsion will deteriorate, resulting in destruction of the emulsion, generation of coarse particles over time, etc. This may cause a saponification reaction of vinyl acetate, and may also cause a decrease in adhesive strength. Among the reductive discoloration inhibitors, sodium thiosulfate, sodium sulfite, and Rongarit are particularly preferred in consideration of miscibility with vinyl acetate emulsion adhesives, stability over time, and the like.
These may be used alone or in an appropriate mixture. For example, when bonding paulownia veneers using the adhesive produced in this way, there is no need for special consideration or ingenuity, and it is sufficient to use the adhesive as is. There is no need for any complicated processes such as changing the formulation depending on the season. Furthermore, when using the adhesive composition of the present invention,
It is also possible to partially mix an acrylic copolymer emulsion, a synthetic rubber emulsion such as SBR, NBR, etc., or use wheat flour, starch, defatted soybean flour, etc. as an extender. Also, clay, kaolin, talc, wood flour, walnut flour, etc. may be used for increasing the amount of filling. These can be used in amounts up to 200% by weight, based on the emulsion. It is also possible to add a formalin-based condensation resin to the adhesive composition of the present invention, but in order to minimize the generation of formalin, the amount should be reduced or a formalin absorbent should be added. is preferred. In this case, a range of at most 30% by weight, based on the emulsion, is preferred. Furthermore, ethylene glycol for adjusting the open time and closed time during operation of the adhesive composition of the present invention;
It is also possible to add polyhydric alcohols such as diethylene glycol and glycerin. The adhesive composition according to the present invention does not cause discoloration of adhered materials, has an excellent adhesive effect, and does not generate any formalin. In particular, when the adhesive of the present invention is used in the production of paulownia veneer decorative laminates, its features are more clearly exhibited. That is, a decorative board with significantly improved cosmetic properties can be produced without causing any discoloration from pink to red, which would reduce the cosmetic properties of paulownia wood. The present invention will be specifically described below with reference to examples. Example 1 A predetermined amount of the additives shown in Table 1 below was added to Yodozol ES-07 (polyvinyl acetate homopolymer emulsion manufactured by Kanebo NSC Co., Ltd.), and the water content was adjusted to approx.
20% 0.16mm paulownia veneer to 2.7mm semi-odorless plywood,
After adhering under the following conditions, it was immediately placed in a polyethylene bag, sealed with air, and left to stand, and discoloration was observed. The results are shown in Table 1. Adhesion conditions: Application amount 100g/m 2 press 110℃ hot press 40 seconds
【表】
ユリア樹脂も変色に効果がみられるがホルマリ
ン発生量が非常に高い。又本発明例でもホルマリ
ンが発生しているが、これは台板合板のホルマリ
ンの発生量とほヾ同量で、本発明の接着組成物か
らのホルマリンの発生ではない。
この比較例―１のES―07単独にて接着し、赤
変した桐化粧板に下記の漂白剤水溶液を20g／m2
の割合で塗布し、自然乾燥を行なつて赤変の変化
をみた。結果を第２表に示す。[Table] Urea resin is also effective in preventing discoloration, but the amount of formalin generated is extremely high. Although formalin was generated in the examples of the present invention, this amount was approximately the same as the amount of formalin generated in the base plywood, and was not due to the generation of formalin from the adhesive composition of the present invention. The following bleach aqueous solution was applied at 20 g/m 2 to the reddish paulownia decorative board that was adhered with ES-07 alone from Comparative Example-1.
It was applied at a ratio of The results are shown in Table 2.
【表】【table】
【表】
上表の結果から桐突板が変色してしまつてから
では漂白することができず、接着する際に赤色変
化をとめることが必要なことがわかる。
実施例 ２
ヨドゾールEQ―15（カネボウエヌエスシー(株)社
製ポリ酢酸ビニルホモポリマーエマルジヨン）
100部にチオ硫酸ソーダ―50％水溶液を下表の様
に添加し実施例―１と同様に接着を行ないポリエ
チレン袋中で変色を観察した。結果を第３表に示
す。[Table] From the results in the table above, it can be seen that it is impossible to bleach the paulownia wood veneer once it has changed color, and it is necessary to stop the red color change before gluing. Example 2 Yodozol EQ-15 (polyvinyl acetate homopolymer emulsion manufactured by Kanebo NSC Co., Ltd.)
A 50% aqueous solution of sodium thiosulfate was added to 100 parts as shown in the table below, and adhesion was carried out in the same manner as in Example 1, and discoloration was observed in a polyethylene bag. The results are shown in Table 3.
【表】
小麦粉での増量を行つても変色をとめる効果は
うすれないことがわかる。
実施例 ３
ヨドゾールES―07 34部に小麦粉40部水40部を
加え、更に〓ゲタライムUA―104（住友ベークラ
イト社製ユリア―ホルマリン樹脂水溶液）を25部
加え接着剤を作つた。この接着剤にホルマリン吸
収剤として尿素を加え実施例―１と同様な操作で
桐化粧板を作り変色試験を行なつた。結果を第４
表に示す。[Table] It can be seen that even if the amount of flour is increased, the effect of preventing discoloration does not diminish. Example 3 An adhesive was prepared by adding 40 parts of wheat flour and 40 parts of water to 34 parts of Yodozol ES-07, and further adding 25 parts of Getalime UA-104 (a urea-formalin resin aqueous solution manufactured by Sumitomo Bakelite). Urea was added to this adhesive as a formalin absorbent, and a paulownia decorative board was prepared in the same manner as in Example 1 and a discoloration test was conducted. 4th result
Shown in the table.
【表】
上表からホルマリン吸収剤の入つた接着剤では
ホルマリンの発生量はおさえられるが変色がみら
れるのに対して本発明のものは効果的に変色がお
さえられ、しかもホルマリンの発生量もコントロ
ールが可能であることがわかる。
実施例 ４
ヨドゾールEQ―15を100部にチオ硫酸ソーダ25
％水溶液と亜硫酸ソーダ25％水溶液の１：１混合
物を５部加え30℃中に３ケ月間放置後実施例―１
と同様にして桐化粧板の変色試験をしたが、EQ
―15を100部にチオ硫酸ソーダ25％水溶液５部を
接着直前に配合して作成した接着剤で接着したも
のとの差はまつたくみられず、又エマルジヨンも
安定で変化がなかつた。[Table] From the table above, the adhesive containing a formalin absorbent suppresses the amount of formalin generated but discoloration is observed, whereas the adhesive of the present invention effectively suppresses discoloration and also reduces the amount of formalin generated. It turns out that control is possible. Example 4 100 parts of Yodozol EQ-15 and 25 parts of sodium thiosulfate
Example 1 After adding 5 parts of a 1:1 mixture of % aqueous solution and 25% aqueous solution of sodium sulfite and leaving it at 30°C for 3 months.
I conducted a discoloration test on paulownia decorative board in the same way as EQ.
There was no obvious difference between the emulsion and the adhesive prepared by mixing 100 parts of -15 with 5 parts of a 25% sodium thiosulfate aqueous solution immediately before adhesion, and the emulsion was stable and did not change.
Claims (1)
防止剤を配合してなる防変色性接着組成物。 ２ 還元性変色防止剤がチオ硫酸ソーダ、亜硫酸
ソーダ又はロンガリツトである特許請求の範囲第
１項記載の防変色性接着組成物。 ３ 還元性変色防止剤の量がポリ酢酸ビニル系エ
マルジヨン100重量部に対し１〜10重量部である
特許請求の範囲第１項記載の防変色性接着組成
物。[Scope of Claims] 1. An anti-discoloration adhesive composition comprising a polyvinyl acetate emulsion and a reducing anti-discoloration agent. 2. The anti-discoloration adhesive composition according to claim 1, wherein the reducing anti-discoloration agent is sodium thiosulfate, sodium sulfite or Rongarit. 3. The anti-discoloration adhesive composition according to claim 1, wherein the amount of the reducing discoloration inhibitor is 1 to 10 parts by weight based on 100 parts by weight of the polyvinyl acetate emulsion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17806781A JPS5879069A (en) | 1981-11-05 | 1981-11-05 | Adhesive composition preventing discoloration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17806781A JPS5879069A (en) | 1981-11-05 | 1981-11-05 | Adhesive composition preventing discoloration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5879069A JPS5879069A (en) | 1983-05-12 |
| JPH0214945B2 true JPH0214945B2 (en) | 1990-04-10 |
Family
ID=16042030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17806781A Granted JPS5879069A (en) | 1981-11-05 | 1981-11-05 | Adhesive composition preventing discoloration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5879069A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1339475C (en) * | 1988-07-05 | 1997-09-23 | Ppg Industries Ohio, Inc. | Chemical treatment for fibers and reinforcement for polymer matrices resulting in good solvent resistance |
| US5247004A (en) * | 1989-02-03 | 1993-09-21 | Ppg Industries, Inc. | Polymeric-containing compositions with improved oxidative stability |
| CA1336110C (en) * | 1989-02-03 | 1995-06-27 | Robert Gregory Swisher | Polymeric-containing compositions with improved oxidative stability |
| CN1124325C (en) * | 1999-11-08 | 2003-10-15 | 成都正光科技股份有限公司 | Structural acrylate glue |
| JP2005023156A (en) * | 2003-06-30 | 2005-01-27 | Nippon Shokubai Co Ltd | Solid adhesive and liquid raw material composition for solid adhesive |
| JP4453745B2 (en) | 2007-11-20 | 2010-04-21 | 株式会社デンソー | Fuel injection valve |
| CN105441022A (en) * | 2015-12-28 | 2016-03-30 | 常熟市宏宇钙化物有限公司 | Method for preparing calcium hydroxide adhesive |
-
1981
- 1981-11-05 JP JP17806781A patent/JPS5879069A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5879069A (en) | 1983-05-12 |
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