JPH05170803A - Production of synthetic emulsion resin - Google Patents

Production of synthetic emulsion resin

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Publication number
JPH05170803A
JPH05170803A JP35655991A JP35655991A JPH05170803A JP H05170803 A JPH05170803 A JP H05170803A JP 35655991 A JP35655991 A JP 35655991A JP 35655991 A JP35655991 A JP 35655991A JP H05170803 A JPH05170803 A JP H05170803A
Authority
JP
Japan
Prior art keywords
emulsion
monomer
water
isopropylacrylamide
parts
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.)
Pending
Application number
JP35655991A
Other languages
Japanese (ja)
Inventor
Yasuhiko Atago
靖彦 愛宕
Hiroshi Oka
洋 岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kohjin Holdings Co Ltd
Kohjin Co
Original Assignee
Kohjin Holdings Co Ltd
Kohjin Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kohjin Holdings Co Ltd, Kohjin Co filed Critical Kohjin Holdings Co Ltd
Priority to JP35655991A priority Critical patent/JPH05170803A/en
Publication of JPH05170803A publication Critical patent/JPH05170803A/en
Pending legal-status Critical Current

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  • Polymerisation Methods In General (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

PURPOSE:To obtain the title resin having a high amide group content and therefore an excellent adhesiveness by emulsion-polymerizing a monomer mixture consisting mainly of an N-isopropylacrylamide and a hydrophilic monomer above a specified temperature. CONSTITUTION:A synthetic emulsion resin is produced by emulsion-polymerizing a monomer mixture mainly consisting of 5-40wt.% N-isopropylacrylamide (A) and 95-60wt.% copolymerizable hydrophobic monomer (B) at a temperature above 32 deg.C. Component A used has a relatively high partition coefficient in a hydrophobic monomer/water system in spite of being a water-soluble monomer, has a property of decreasing in its solubility in water as the temperature is raised when it is above 30 deg.C and as a result it can show a large partition coefficient in a hydrophobic monomer/water at high temperature. When it is emulsion- copolymerized at a temperature above 32 deg.C, emulsion particles comprising a polymer of monomers A and B in an arbitrary proportion can be formed without forming a water-soluble polymer undesirable in respect of the thickening of the system, etc.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はアミド基の含有率が高
く、それによって接着性に優れた合成エマルジョン樹脂
及びその製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic emulsion resin having a high amide group content and excellent adhesiveness thereby, and a method for producing the same.

【0002】[0002]

【従来の技術】合成エマルジョン樹脂は、塗料、接着剤
等に広く用いられている。近年、合成エマルジョン樹脂
の高付加価値の為、いろいろな工夫が成される様になっ
てきた。その1つの方法としてエマルジョン樹脂に官能
基を導入することが検討されている。合成エマルジョン
樹脂中に官能基を導入する最も一般的な方法はエマルジ
ョン重合時に官能基を有するモノマーを共重合するもの
である。
2. Description of the Related Art Synthetic emulsion resins are widely used in paints, adhesives and the like. Due to the high added value of synthetic emulsion resins, various innovations have been made in recent years. Introducing a functional group into an emulsion resin is being studied as one of the methods. The most common method of introducing a functional group into a synthetic emulsion resin is to copolymerize a monomer having a functional group during emulsion polymerization.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、疎水性
モノマーに、極性の強い官能基を持つモノマーを、エマ
ルジョン重合により共重合させるには大きな制約があ
る。エマルジョン重合では水中に存在する疎水性のモノ
マーミセル中でポリマーが形成される。ところが極性を
有するモノマーは一般的に水に対する溶解度が大きく、
疎水性モノマーミセル中に分配されにくく目的とする組
成の共重合体が得られないだけでなく、好ましくない水
中での重合を起こし、系の増粘、エマルジョンの破壊等
を起こす。よって、エマルジョン重合によってエマルジ
ョン樹脂中に極性の強い官能基を導入することは容易で
なかった。例えば、アミド基は、極性が強く、かつ、イ
オン性を有しないので広範な用途の合成エマルジョン樹
脂の接着性等の改善に有効であるが、アミド基を有する
アクリルアミド類は一般に親水性が強く、疎水性モノマ
ーと共にエマルジョン重合によってエマルジョン樹脂中
に共重合することが極めて難しく実用化の障害となって
いた。
However, there is a great limitation in copolymerizing a hydrophobic monomer with a monomer having a strongly polar functional group by emulsion polymerization. In emulsion polymerization, the polymer is formed in hydrophobic monomer micelles that are present in water. However, polar monomers generally have high solubility in water,
Not only is it difficult to partition into the hydrophobic monomer micelles, a copolymer having the desired composition cannot be obtained, but also undesired polymerization occurs in water, resulting in thickening of the system and destruction of the emulsion. Therefore, it was not easy to introduce a highly polar functional group into the emulsion resin by emulsion polymerization. For example, an amide group is strong in polarity and does not have ionicity, and is therefore effective in improving the adhesiveness of synthetic emulsion resins for a wide range of applications, but acrylamides having an amide group generally have strong hydrophilicity. It was extremely difficult to copolymerize with the hydrophobic monomer into the emulsion resin by emulsion polymerization, which was an obstacle to practical use.

【0004】[0004]

【課題を解決するための手段】本発明は上記の問題を解
決し、極性の強いアミド基の含有率の高い合成エマルジ
ョン樹脂及びその製造方法を提供するものである。すな
わち、本発明は、以下に挙げるとおりである。 1. 主原料に5〜40重量%のN−イソプロピルアク
リルアミドと95〜60重量%の共重合可能な疎水性モ
ノマーを用い共重合することを特徴とする合成エマルジ
ョン樹脂の製造方法。 2. 疎水性モノマーが、共役ジエン系モノマー及び疎
水性ビニルモノマーからなる群より選ばれる1種又は2
種以上である1.記載の合成エマルジョン樹脂の製造方
法。 3. 主原料に5〜40重量%のN−イソプロピルアク
リルアミドと95〜60重量%の疎水性モノマーを用
い、32℃を超える温度で、エマルジョン重合すること
を特徴とする合成エマルジョン樹脂の製造方法。
SUMMARY OF THE INVENTION The present invention solves the above problems and provides a synthetic emulsion resin having a high content of amide groups having strong polarity and a method for producing the same. That is, the present invention is as follows. 1. A method for producing a synthetic emulsion resin, which comprises copolymerizing 5 to 40% by weight of N-isopropylacrylamide and 95 to 60% by weight of a copolymerizable hydrophobic monomer as a main raw material. 2. The hydrophobic monomer is one or two selected from the group consisting of a conjugated diene-based monomer and a hydrophobic vinyl monomer.
More than one species 1. A method for producing the synthetic emulsion resin described. 3. A method for producing a synthetic emulsion resin, characterized in that 5 to 40% by weight of N-isopropylacrylamide and 95 to 60% by weight of a hydrophobic monomer are used as main raw materials, and emulsion polymerization is carried out at a temperature exceeding 32 ° C.

【0005】以下、本発明について詳細に説明する。本
発明に用いられるN−イソプロピルアクリルアミドは、
水溶性モノマーでありながら、疎水性モノマー/水の系
で比較的大きな分配係数を有する。さらにN−イソプロ
ピルアクリルアミドは、30℃以上では温度の上昇とと
もに水に対する溶解度が低下するという特異な挙動を示
し、その結果、高温で疎水性モノマー/水の分配係数が
大きくなる。N−イソプロピルアクリルアミドの疎水性
モノマー/水の分配係数を表1に示す。又比較の為、他
のモノマーの分配係数も併せて表1に記載する。さら
に、N−イソプロピルアクリルアミドのホモポリマー
は、32℃に転移点を持つ感温性ポリマーで、転移温度
未満では水に溶けるが、転移温度を超えると水に溶けな
い。N−イソプロピルアクリルアミドはこの様な特性を
有するので、32℃を超えた温度、好ましくは35℃以
上の温度で、疎水性モノマーと共にエマルジョン共重合
すると、系の増粘等の好ましくない水溶性ポリマーを副
生する事なく、任意の割合で疎水性モノマーとN−イソ
プロピルアクリルアミドが共重合したポリマーから成る
エマルジョン粒子を得る事ができる。
The present invention will be described in detail below. The N-isopropylacrylamide used in the present invention is
Despite being a water-soluble monomer, it has a relatively large partition coefficient in the hydrophobic monomer / water system. Furthermore, N-isopropylacrylamide exhibits a peculiar behavior that the solubility in water decreases with increasing temperature at 30 ° C. or higher, and as a result, the hydrophobic monomer / water partition coefficient increases at high temperatures. The partition coefficient of N-isopropylacrylamide hydrophobic monomer / water is shown in Table 1. For comparison, the partition coefficients of other monomers are also shown in Table 1. Further, a homopolymer of N-isopropylacrylamide is a temperature-sensitive polymer having a transition point at 32 ° C., which is soluble in water below the transition temperature, but is insoluble above the transition temperature. Since N-isopropylacrylamide has such characteristics, emulsion copolymerization with a hydrophobic monomer at a temperature higher than 32 ° C., preferably a temperature higher than 35 ° C. may cause undesirable water-soluble polymers such as thickening of the system. Emulsion particles composed of a polymer obtained by copolymerizing a hydrophobic monomer and N-isopropylacrylamide in an arbitrary ratio can be obtained without by-products.

【0006】[0006]

【表1】 MMA:メタクリル酸メチル、MA:アクリル酸メチ
ル、EA:アクリル酸エチル、BA:アクリル酸ブチ
ル、st:スチレン、AN:アクリロニトリル *は奥田平、稲垣寛/編「合成樹脂エマルジョン」高分
子刊行P.16より引用した。
[Table 1] MMA: Methyl Methacrylate, MA: Methyl Acrylate, EA: Ethyl Acrylate, BA: Butyl Acrylate, st: Styrene, AN: Acrylonitrile * is Tadaku Okuda, Hiroshi Inagaki / ed. Quoted from 16.

【表2】 MMA:メタクリル酸メチル、MA:アクリル酸メチル EA:アクリル酸エチル、BA:アクリル酸ブチル st:スチレン、AN:アクリロニトリル[Table 2] MMA: Methyl methacrylate, MA: Methyl acrylate EA: Ethyl acrylate, BA: Butyl acrylate st: Styrene, AN: Acrylonitrile

【0007】N−イソプロピルアクリルアミドのエマル
ジョン樹脂中の組成比は、重合の面からは任意可能であ
るが、物性の面から、エマルジョンの骨格構成及び基本
的性質を成す疎水性モノマーのエマルジョンポリマーの
特性を損なわず、かつ、アクリルアミド基の特性を発現
する為には、仕込みモノマー100重量部中に占めるN
−イソプロピルアクリルアミドの含量は5〜40重量部
である。
The composition ratio of N-isopropylacrylamide in the emulsion resin can be arbitrarily set from the viewpoint of polymerization, but from the viewpoint of physical properties, the characteristics of the emulsion polymer of the hydrophobic monomer that constitutes the skeletal constitution and basic properties of the emulsion. In order to express the characteristics of the acrylamide group without impairing the N content, N in 100 parts by weight of the charged monomer is used.
-The content of isopropylacrylamide is 5-40 parts by weight.

【0008】本発明に用いられる共重合可能なモノマー
としては、疎水性モノマーが好適である。疎水性モノマ
ーは、本発明のエマルジョンの骨格を成すもので通常の
ラテックス、エマルジョンに用いられるモノマーはすべ
て対象となる。具体的には、ブタジエン、イソプレン、
2−クロル−1,3−ブタジエン、2−メチル−1,3
−ブタジエン等の共役ジエン系モノマー、アクリル酸メ
チル、アクリル酸エチル、アクリル酸ブチル、アクリル
酸エチルヘキシル等のアクリル酸エステル類、メタクリ
ル酸メチル、メタクリル酸エチル、等のメタクリル酸エ
ステル類、及び、スチレン、酢酸ビニル、アクリロニト
リル等の疎水性ビニルモノマーを挙げることができる。
Hydrophobic monomers are suitable as the copolymerizable monomer used in the present invention. The hydrophobic monomer forms the skeleton of the emulsion of the present invention, and all of the monomers used in ordinary latex and emulsion are covered. Specifically, butadiene, isoprene,
2-chloro-1,3-butadiene, 2-methyl-1,3
-Conjugated diene monomers such as butadiene, acrylic acid esters such as methyl acrylate, ethyl acrylate, butyl acrylate, ethylhexyl acrylate, methacrylic acid esters such as methyl methacrylate, ethyl methacrylate, and styrene; Hydrophobic vinyl monomers such as vinyl acetate and acrylonitrile can be mentioned.

【0009】さらに、上記疎水性モノマーに、上記疎水
性モノマーと共重合可能なモノマーを添加することもで
きる。上記疎水性モノマーと共重合可能なモノマーとし
ては、アクリル酸、メタクリル酸、マレイン酸等のアニ
オン性ビニルモノマー、ジメチルアミノエチル(メタ)
アクリレート、ジメチルアミノプロピル(メタ)アクリ
ルアミド等のカチオン性ビニルモノマー、アクリルアミ
ド、ビニルピロリドン、ジメチルアクリルアミド等の共
重合可能なビニルモノマーが挙げられる。疎水性モノマ
ーに添加する疎水性モノマーと共重合可能なモノマーの
添加量は、本発明のエマルジョン樹脂の特性であるエマ
ルジョンの骨格を成す上記疎水性モノマーのエマルジョ
ンポリマーの特性、及び、N−イソプロピルアクリルア
ミドのアクリルアミド基の特性を損なわない程度に抑制
しなければならない。
Further, a monomer copolymerizable with the hydrophobic monomer may be added to the hydrophobic monomer. Examples of the monomer copolymerizable with the above hydrophobic monomer include anionic vinyl monomers such as acrylic acid, methacrylic acid and maleic acid, dimethylaminoethyl (meth)
Examples thereof include cationic vinyl monomers such as acrylate and dimethylaminopropyl (meth) acrylamide, and copolymerizable vinyl monomers such as acrylamide, vinylpyrrolidone and dimethylacrylamide. The amount of the monomer copolymerizable with the hydrophobic monomer added to the hydrophobic monomer depends on the characteristics of the emulsion polymer of the above-mentioned hydrophobic monomer forming the skeleton of the emulsion, which is the characteristic of the emulsion resin of the present invention, and N-isopropylacrylamide. It must be suppressed to the extent that it does not impair the characteristics of the acrylamide group.

【0010】乳化重合に用いる界面活性剤は、アニオン
性界面活性剤、ノニオン性界面活性剤、及び両性界面活
性剤が用いられる。アニオン性界面活性剤としては、例
えば高級アルコールの硫酸エステル塩、アルキルベンゼ
ンスルホン酸塩、脂肪族スルホン酸塩等が挙げられ、ノ
ニオン性界面活性剤としては、ポリエチレングリコール
のアルキルエステル型、アルキルエーテル型、アルキル
フェニルエーテル型等が挙げられる。又、両性界面活性
剤としては、アニオン部分としてカルボン酸塩、スルホ
ン酸塩、硫酸エステル塩、カチオン部分として、アミン
塩、第4級アンモニウム塩等が挙げられる。これら界面
活性剤の使用割合は耐水性の点から全モノマー単量体の
0.1〜5重量%である。重合開始剤としては、有機
系、無機系開始剤が使用できる。有機系開始剤として
は、クメンハイドロパーオキサイド、ベンゾイルパーオ
キサイドなどの有機過酸化物、アゾビスイソブチロニト
リルなどのアゾ化合物が使用できる。無機系開始剤とし
ては、過硫酸カリウム、過硫酸ナトリウム、過硫酸アン
モニウムなどが使用できる。これらは単独で、または還
元剤を併用するレドックス系触媒としても使用可能であ
る。重合開始剤の使用割合は通常全単量体に対して0.
1〜10重量%である。
As the surfactant used for emulsion polymerization, an anionic surfactant, a nonionic surfactant and an amphoteric surfactant are used. Examples of the anionic surfactant include sulfate ester salts of higher alcohols, alkylbenzene sulfonates, aliphatic sulfonates, and the like, and nonionic surfactants include alkyl ester type of polyethylene glycol, alkyl ether type, Examples thereof include alkyl phenyl ether type. Examples of the amphoteric surfactant include a carboxylate salt, a sulfonate salt, a sulfate ester salt as the anion portion, and an amine salt, a quaternary ammonium salt and the like as the cation portion. From the viewpoint of water resistance, the proportion of these surfactants used is 0.1 to 5% by weight based on the total weight of the monomers. Organic or inorganic initiators can be used as the polymerization initiator. As the organic initiator, organic peroxides such as cumene hydroperoxide and benzoyl peroxide, and azo compounds such as azobisisobutyronitrile can be used. As the inorganic initiator, potassium persulfate, sodium persulfate, ammonium persulfate and the like can be used. These can be used alone or as a redox catalyst in combination with a reducing agent. The proportion of the polymerization initiator used is usually 0.
It is 1 to 10% by weight.

【0011】[0011]

【実施例】以下に、実施例を挙げて本発明を具体的に説
明するが、本発明は実施例に何ら限定されるものではな
い。なお、実施例中に用いられる「%」および「部」
は、「重量%」および「重量部」を意味する。 実施例1 容量500mlの4つ口フラスコ容器にNIPAM(N
−イソプロピルアクリルアミド)3部、メタクリル酸メ
チル12部を仕込み、さらに純水200部、ドデシルベ
ンゼンスルホン酸ナトリウム1.5部、過硫酸アンモニ
ウム0.02部を仕込み、窒素雰囲気下において温度6
0℃で2時間重合した。そのあと、重合を完結するため
に温度を75℃に上げ1時間反応を行った。このように
して得られたエマルジョンを「エマルジョンA」とす
る。 比較例1 実施例1においてNIPAM(N−イソプロピルアクリ
ルアミド)の替りにアクリルアミドを2.03部、メタ
クリル酸メチル12.31部にした以外は全て同様な操
作を行った。このようにして得られたエマルジョンを
「エマルジョンB」とする。上記共重合体エマルジョン
A,Bの元素分析結果を表3に示す。
EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the examples. In addition, "%" and "part" used in the examples
Means "% by weight" and "parts by weight". Example 1 A NIPAM (N
-Isopropylacrylamide) 3 parts, methyl methacrylate 12 parts, 200 parts of pure water, 1.5 parts of sodium dodecylbenzene sulfonate, 0.02 parts of ammonium persulfate were charged, and the temperature was 6 under nitrogen atmosphere.
Polymerization was carried out at 0 ° C for 2 hours. Then, in order to complete the polymerization, the temperature was raised to 75 ° C. and the reaction was carried out for 1 hour. The emulsion thus obtained is referred to as "emulsion A". Comparative Example 1 The same operation as in Example 1 was conducted except that 2.03 parts of acrylamide and 12.31 parts of methyl methacrylate were used instead of NIPAM (N-isopropylacrylamide). The emulsion thus obtained is referred to as "emulsion B". Table 3 shows the results of elemental analysis of the above copolymer emulsions A and B.

【0012】[0012]

【表3】 [Table 3]

【0013】(評価方法)ビーカーに「エマルジョン
A,B」を各々100g取り、攪拌下において100g
のメタノールを徐々に加えていき、ラテックスを壊し
た。得られたポリマーを室温で充分に純水で洗浄し、未
反応モノマー及び水溶性ポリマーの除去を行い、これを
元素分析に用いた。 (評価結果)共重合体「エマルジョンB」は、生成した
エマルジョン系の粘度がAよりも高くまた元素分析によ
るN含有率が低いことから、共重合体において「エマル
ジョンA」に比べ劣る。
(Evaluation Method) 100 g of each of "Emulsion A and B" was placed in a beaker, and 100 g was added with stirring.
Methanol was gradually added to break the latex. The obtained polymer was thoroughly washed with pure water at room temperature to remove unreacted monomer and water-soluble polymer, and this was used for elemental analysis. (Evaluation result) The copolymer "emulsion B" is inferior to the "emulsion A" in the copolymer because the viscosity of the produced emulsion system is higher than A and the N content by elemental analysis is low.

【0014】実施例2 容量100リットルの耐圧反応器にNIPAM(N−イ
ソプロピルアクリルアミド)5部、ブタジエン5部、ス
チレン5部、メチルメタクリレート7部、アクリル酸
0.5部を仕込み、さらに純水200部、四塩化炭素
1.5部、ドデシルベンゼンスルホン酸ナトリウム0.
5部、過硫酸アンモニウム1.0部を仕込み、窒素雰囲
気下において温度70℃で2時間重合した。次にブタジ
エン23部、スチレン47部、メチルメタクリレート3
部、アクリロニトリル4部、アクリル酸0.5部からな
る単量体混合物を7時間連続的に添加し重合を行った。
そのあと重合を完結するために2時間反応を継続し、重
合を終了し、水酸化ナトリウムを用いてpH7に調整し
た。このようにして得られたエマルジョンを「エマルジ
ョンC」とする。 比較例2 上記実施例2のNIPAM(N−イソプロピルアクリル
アミド)をアクリル酸2部に替えた以外は全て同様な操
作及び処理を行った。このようにして得られたエマルジ
ョンを「エマルジョンD」とする。
Example 2 A pressure-resistant reactor having a capacity of 100 liters was charged with 5 parts of NIPAM (N-isopropylacrylamide), 5 parts of butadiene, 5 parts of styrene, 7 parts of methyl methacrylate and 0.5 part of acrylic acid, and 200 parts of pure water. Parts, carbon tetrachloride 1.5 parts, sodium dodecylbenzene sulfonate 0.
5 parts and 1.0 part of ammonium persulfate were charged, and polymerization was carried out at a temperature of 70 ° C. for 2 hours in a nitrogen atmosphere. Next, 23 parts of butadiene, 47 parts of styrene, 3 parts of methyl methacrylate
Parts, 4 parts of acrylonitrile and 0.5 parts of acrylic acid were continuously added for 7 hours for polymerization.
Then, the reaction was continued for 2 hours to complete the polymerization, the polymerization was terminated, and the pH was adjusted to 7 with sodium hydroxide. The emulsion thus obtained is referred to as "emulsion C". Comparative Example 2 The same operation and treatment were performed except that NIPAM (N-isopropylacrylamide) in Example 2 was replaced with 2 parts of acrylic acid. The emulsion thus obtained is referred to as "emulsion D".

【0015】実施例3 300ml4ツ口フラスコに純水50部を入れ窒素気流
中80℃まで昇温し、5%過硫酸アンモニウム10.0
部を添加した。そこへ、アクリル酸ブチル47部、メタ
クリル酸メチル30部、スチレン20部、NIPAM
(N−イソプロピルアクリルアミド)5部、純水94.
0部、ドデシルベンゼンスルホン酸ナトリウム3部を配
合しあらかじめ乳化したモノマーエマルジョンを2時間
かけて滴下した。そのあと、重合を完結させるために1
時間反応を継続し重合を終了した。このようにして得ら
れたエマルジョンを「エマルジョンE」とする。 比較例3 上記実施例3のNIPAM(N−イソプロピルアクリル
アミド)をアクリル酸におきかえたこと以外は全て同様
な操作を行った。得られたエマルジョンを「エマルジョ
ンF」とする。 比較例4 上記実施例3のNIPAM(N−イソプロピルアクリル
アミド)をアクリルアミドにおきかえたこと以外は全て
同様な操作を行った。得られたエマルジョンを「エマル
ジョンG」とする。
Example 3 50 parts of pure water was placed in a 300 ml four-necked flask and heated to 80 ° C. in a nitrogen stream, and 5% ammonium persulfate 10.0
Parts were added. There, 47 parts of butyl acrylate, 30 parts of methyl methacrylate, 20 parts of styrene, NIPAM
(N-isopropylacrylamide) 5 parts, pure water 94.
A monomer emulsion prepared by mixing 0 parts and 3 parts of sodium dodecylbenzenesulfonate and emulsified in advance was added dropwise over 2 hours. Then 1 to complete the polymerization
The reaction was continued for an hour to complete the polymerization. The emulsion thus obtained is referred to as "emulsion E". Comparative Example 3 The same operation was performed except that NIPAM (N-isopropylacrylamide) of Example 3 was replaced with acrylic acid. The obtained emulsion is referred to as "emulsion F". Comparative Example 4 The same operation was performed except that NIPAM (N-isopropylacrylamide) in Example 3 was replaced with acrylamide. The obtained emulsion is referred to as "emulsion G".

【0016】上記「エマルジョンC〜G」の接着性評価
(ゴバン目テスト)を以下の如く行なった。結果を表4
に示す。アクリル板表面をアルコールにて脱脂(洗浄)
し乾燥させた後、セロテープ1枚厚にてガラス棒でしご
き塗りを行う。塗工後80℃乾燥し造膜させる。作成し
た塗膜をカッターにて、1mm間隔に縦11本、横11
本切込み、1mm×1mmマスが100個のゴバン目を
つくる。次ぎに、ゴバン目上にセロテープ(ニチバン)
を貼り充分に密着させた後、約45度の角度で引き剥
す。このときアクリル板上のマス目の、破損、又は剥離
しなかった数を数え、測定値とする。例えばマス目10
0個の内、破損、又は剥離しなかった数が90個の場
合、90/100と表わす。
Evaluation of the adhesiveness of the above-mentioned "emulsions C to G" (an eyelet test) was carried out as follows. The results are shown in Table 4.
Shown in. Degreasing (cleaning) the acrylic plate surface with alcohol
Then, after drying, a piece of cellophane tape is applied with ironing with a glass rod. After coating, it is dried at 80 ° C. to form a film. Created coating film with a cutter at 11 mm intervals, 11 lengthwise, 11 widthwise
Make 100 cuts of 1 mm x 1 mm square in this cut. Next, cellophane tape (Nichiban)
After adhering and adhering sufficiently, peel off at an angle of about 45 degrees. At this time, the number of squares on the acrylic plate that were not damaged or peeled off is counted and used as a measurement value. For example, square 10
When the number of 0 pieces that did not break or peel was 90 pieces, it is expressed as 90/100.

【0017】[0017]

【表4】 [Table 4]

【0018】比較例2〜4(「エマルジョンD,F,
G」)は共重合官能基としてアクリル酸、アクリルアミ
ドを用いた場合であり、生成したエマルジョン粘度はい
ずれも実施例よりも高く、また、接着性も劣っていた。
Comparative Examples 2 to 4 (“Emulsion D, F,
G)) is the case where acrylic acid or acrylamide was used as a copolymerization functional group, and the produced emulsion viscosities were all higher than those of the examples, and the adhesiveness was also inferior.

【0019】[0019]

【発明の効果】上記のとおり、エマルジョン重合時に官
能基を有するモノマーとしてNIPAM(N−イソプロ
ピルアクリルアミド)を共重合させることにより得られ
た組成物は優れた接着性を有しており、各種のエマルジ
ョンの特性改善に極めて有用である。
As described above, the composition obtained by copolymerizing NIPAM (N-isopropylacrylamide) as a monomer having a functional group at the time of emulsion polymerization has excellent adhesiveness and can be used in various emulsions. It is extremely useful for improving the characteristics of.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 主原料に5〜40重量%のN−イソプロ
ピルアクリルアミドと95〜60重量%の共重合可能な
疎水性モノマーを用い共重合することを特徴とする合成
エマルジョン樹脂の製造方法。
1. A process for producing a synthetic emulsion resin, which comprises copolymerizing 5 to 40% by weight of N-isopropylacrylamide and 95 to 60% by weight of a copolymerizable hydrophobic monomer as a main raw material.
【請求項2】 疎水性モノマーが、共役ジエン系モノマ
ー及び疎水性ビニルモノマーからなる群より選ばれる1
種又は2種以上である請求項1記載の合成エマルジョン
樹脂の製造方法。
2. The hydrophobic monomer is 1 selected from the group consisting of a conjugated diene-based monomer and a hydrophobic vinyl monomer.
The method for producing a synthetic emulsion resin according to claim 1, wherein the synthetic emulsion resin is one kind or two or more kinds.
【請求項3】 主原料に5〜40重量%のN−イソプロ
ピルアクリルアミドと95〜60重量%の疎水性モノマ
ーを用い、32℃を超える温度で、エマルジョン重合す
ることを特徴とする合成エマルジョン樹脂の製造方法。
3. A synthetic emulsion resin, characterized in that 5-40% by weight of N-isopropylacrylamide and 95-60% by weight of a hydrophobic monomer are used as main raw materials, and emulsion polymerization is carried out at a temperature above 32 ° C. Production method.
JP35655991A 1991-12-25 1991-12-25 Production of synthetic emulsion resin Pending JPH05170803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35655991A JPH05170803A (en) 1991-12-25 1991-12-25 Production of synthetic emulsion resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35655991A JPH05170803A (en) 1991-12-25 1991-12-25 Production of synthetic emulsion resin

Publications (1)

Publication Number Publication Date
JPH05170803A true JPH05170803A (en) 1993-07-09

Family

ID=18449635

Family Applications (1)

Application Number Title Priority Date Filing Date
JP35655991A Pending JPH05170803A (en) 1991-12-25 1991-12-25 Production of synthetic emulsion resin

Country Status (1)

Country Link
JP (1) JPH05170803A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009031523A1 (en) * 2007-09-03 2009-03-12 University Of Yamanashi Temperature-sensitive polymer, temperature-sensitive fiber and non-woven fabric each using the same, and method for production of temperature-sensitive fiber and non-woven fabric

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009031523A1 (en) * 2007-09-03 2009-03-12 University Of Yamanashi Temperature-sensitive polymer, temperature-sensitive fiber and non-woven fabric each using the same, and method for production of temperature-sensitive fiber and non-woven fabric
JP2009057522A (en) * 2007-09-03 2009-03-19 Univ Of Yamanashi Temperature-responsive polymer, temperature-responsive fiber or nonwoven fabric using the same, and mtehod for producing the same

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