JPH0135868B2 - - Google Patents
Info
- Publication number
- JPH0135868B2 JPH0135868B2 JP56069876A JP6987681A JPH0135868B2 JP H0135868 B2 JPH0135868 B2 JP H0135868B2 JP 56069876 A JP56069876 A JP 56069876A JP 6987681 A JP6987681 A JP 6987681A JP H0135868 B2 JPH0135868 B2 JP H0135868B2
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- emulsion
- vinyl acetate
- parts
- acetate copolymer
- 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
- 239000000839 emulsion Substances 0.000 claims description 54
- 239000000203 mixture Substances 0.000 claims description 30
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 29
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 27
- 239000005977 Ethylene Substances 0.000 claims description 27
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 27
- 239000004014 plasticizer Substances 0.000 claims description 14
- 239000011256 inorganic filler Substances 0.000 claims description 7
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 7
- 239000000565 sealant Substances 0.000 claims description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 4
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims 1
- 229920001577 copolymer Polymers 0.000 claims 1
- 229920005989 resin Polymers 0.000 description 15
- 239000011347 resin Substances 0.000 description 15
- 239000002736 nonionic surfactant Substances 0.000 description 7
- -1 phthalate ester Chemical class 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 description 6
- 239000003945 anionic surfactant Substances 0.000 description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 238000007720 emulsion polymerization reaction Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 239000000080 wetting agent Substances 0.000 description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 239000011381 foam concrete Substances 0.000 description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 235000010981 methylcellulose Nutrition 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 2
- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 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
- 239000004593 Epoxy Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000002585 base Substances 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
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- LRMHFDNWKCSEQU-UHFFFAOYSA-N ethoxyethane;phenol Chemical compound CCOCC.OC1=CC=CC=C1 LRMHFDNWKCSEQU-UHFFFAOYSA-N 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明はエチレン−酢酸ビニル共重合体エマル
ジヨンをビヒクルとする水性シーリング材組成物
に関するものである。
建築物の目地部分、サツシまわり、ガラスのは
めこみ部、ひび割れ個所などの水密性及び気密性
を保持する目的に、水性エマルジヨンタイプの樹
脂をビヒクルとしたシーリング材が使われてい
る。しかしてかかる水性エマルジヨンとしてはア
クリル系樹脂エマルジヨンやエチレン−酢酸ビニ
ル共重合体エマルジヨンが代表的なものとして知
られているが、アクリル系樹脂エマルジヨンをビ
ヒクルとしたシーリング材組成物は耐アルカリ
性、接着性、引張強度などの点で不満があり、エ
チレン−酢酸ビニル共重合体エマルジヨンをビヒ
クルとしたシーリング材組成物は高モジユラスで
あつたり伸びが小さかつたりするため特に軽量発
泡コンクリート等の多孔質の吸水性の高い建築用
構成材には不向きであるという難点がある。
本発明は上記のような従来の難点を、水性エマ
ルジヨンとして品種の異なる特定の２種以上のエ
チレン−酢酸ビニル共重合体エマルジヨンを用い
ることにより解消したものである。
本発明の水性シーリング材組成物は、合成樹脂
エマルジヨン、無機充填剤及び可塑剤を必須成分
として含む組成物であつて、前記合成樹脂エマル
ジヨンが品種の異なる２種以上のエチレン−酢酸
ビニル共重合体エマルジヨンの混合物よりなるも
のである。ここで該混合物中最も量の多いエチレ
ン−酢酸ビニル共重合体をA1、次に量の多いエ
チレン−酢酸ビニル共重合体をA2とするとき、
(i) A1とA2は共にエチレン含量10〜30重量％の
エチレン−酢酸ビニル共重合体であること、
(ii) 前記混合物中のA1とA2の含有量は重量比で
98〜50：２〜50の範囲にあること、
(iii) A1のエチレン含量とA2のエチレン含量は３
重量％以上離れているか、或いは混合前のA1
エマルジヨンのＫ値とA2エマルジヨンのＫ値
は10以上離れていること、
の３条件を全て満足することが不可欠である。
本発明の水性シーリング材組成物は低モジユラ
ス（たとえば50％モジユラスでおよそ１Kg／cm2以
下）、高伸度（たとえばおよそ1000％以上）であ
り、軽量発泡コンクリートをはじめとする多孔質
の吸水性の高い建築用構成材にも好適に適用でき
るという顕著な効果を奏する。
以下本発明の構成を詳細に説明する。
まず本発明においては品種の異なる２種以上の
エチレン−酢酸ビニル共重合体エマルジヨンの混
合物を用いる。該混合物中量の多いエチレン−酢
酸ビニル共重合体から順にA1、A2、A3…と称す
ることにする。
最多の成分A1と次の成分A2は共にエチレン含
量が10〜30重量％のエチレン−酢酸ビニル共重合
体でなければならず、少なくとも一方のエチレン
含量が10重量％未満では耐アルカリ性、接着性が
不足し、一方少なくとも一方のエチレン含量が30
重量％を越えると粘着性が過多となる。A1及び
A2のほかにA3、A4などの少量成分を含んでいて
もよく、これらの成分のエチレン含量は特に限定
はされないが、A1、A2と同様に10〜30重量％の
範囲とすることが望ましい。なおエチレン含量と
は通常の意味での平均含量を意味するものとす
る。
最多の成分A1と次の成分A2の混合物中の含有
量は重量比で98〜50：２〜50の範囲にあることが
要求される。特に好ましい範囲は95〜50：５〜50
である。A1に対しA2の量が余りに少なすぎると
所期の低モジユラス、高伸度が得られない。
さらにA1とA2とは次の点で品種を異にするも
のでなければならない。即ちA1のエチレン含量
とA2のエチレン含量は３重量％以上離れている
か、或いは混合前のA1エマルジヨンのＫ値とA2
エマルジヨンのＫ値は10以上離れているかという
少なくとも一方の条件を具備していなければなら
ない。前者のケースにおいてエチレン含量の差が
３重量％未満のときは所期の低モジユラス、高伸
度が得られない。又後者のケースにおいてＫ値の
差が10未満ではやはり所期の低モジユラス、高伸
度が得られない。Ｋ値は好ましくは20以上離れて
いることが望ましい。後者のケースにおけるＫ値
の差は、重合度を変える方法、乳化剤又は保護コ
ロイドを用いて乳化重合する方法など重合条件を
選択することによつて調整できる。
なおＫ値とは、樹脂分１ｇ相当のエマルジヨン
を精秤し（樹脂のｇ数をＣとする）、これに水５
c.c.を加えてよく分散させた後テトラヒドロフラン
を加えて100c.c.溶液とし、この溶液をオストワル
ド粘度計で25℃における粘度ηを測定すると共
に、エマルジヨンの代りに同量の水を用いて空試
験の粘度ηoを測定し、次の式から求めたもので
ある。
log（η／ηo）／Ｃ＝75K0 2／１＋1.5K0C＋K0
Ｋ＝K0×103
使用するエチレン−酢酸ビニル共重合体エマル
ジヨンの樹脂分濃度は特に限定はないが40〜65重
量％とすることが多い。
エチレン−酢酸ビニル共重合体エマルジヨン
は、エチレンと酢酸ビニルとを通常の方法で乳化
重合することにより得られる。この際一旦乳化重
合したエマルジヨンの存在下に新たにエチレン、
酢酸ビニル、触媒を加えて乳化重合するいわゆる
シード重合法を採用してもよい。
本発明においては合成樹脂エマルジヨンとして
上記のエチレン−酢酸ビニル共重合体エマルジヨ
ンのほかに、これと共にアクリル系樹脂エマルジ
ヨンやSBR系ラテツクスを併用することができ
る。併用の場合、エチレン−酢酸ビニル共重合体
エマルジヨンに対し他のエマルジヨン又はラテツ
クスの配合量は、樹脂分比で等重量以下、好まし
くは半量以下とすべきであり、他のエマルジヨン
やラテツクスを余りに多く併用すると本発明の利
点を損なうようになる。
本発明の組成物は無機充填剤及び可塑剤を含む
ことを必須とする。
無機充填剤としては炭酸カルシウム、クレー、
酸化チタン、水酸化マグネシウム、水酸化アルミ
ニウム、タルク、カーボンブラツク、硫酸バリウ
ム、シリカ、酸化鉄、酸化亜鉛、酸化鉛などがあ
げられ、その配合量は合成樹脂エマルジヨン中の
樹脂分に対し100〜500重量％、好ましくは200〜
400重量％とするのが通常である。
可塑剤としてはポリエステル系可塑剤、フタル
酸エステル系可塑剤、エポキシ系可塑剤、リン酸
エステル系可塑剤、脂肪族二塩基酸エステル系可
塑剤、グリコールエステル系可塑剤、脂肪酸エス
テル系可塑剤などが用いられるが、これらの中で
はフタル酸エステル系可塑剤、なかんづく分子内
に少なくとも１個のブチル基を含有するものを用
いることが特に望ましい。可塑剤の配合量は合成
樹脂エマルジヨン中の樹脂分に対し15〜80重量％
とするのが通常である。
組成物中には上述の合成樹脂エマルジヨン、無
機充填剤及び可塑剤のほかに、分散剤、湿潤剤、
増粘剤を添加することが望ましい。
分散剤としてはトリポリリン酸塩、ヘキサメタ
リン酸塩、ポリアクリル酸塩、ポリメタクリル酸
塩などがあげられ、その添加量は通常無機充填剤
に対し２重量％以下とする。
湿潤剤としてはノニオン界面活性剤などが用い
られ、その添加量は通常無機充填剤に対し３重量
％以下とする。
増粘剤としてはポリビニルアルコール、ポリア
クリル酸ソーダ、ポリアクリル酸アンモニウム、
ポリアクリルアミド、ポリビニルピロリドン、メ
チルセルロース、カルボキシメチルセルロース、
ヒドロキシエチルセルロースなどがあげられ、そ
の添加量は通常エマルジヨンに比し１重量％以下
とする。
本発明の組成物にはさらに必要に応じ接着性向
上剤、消泡剤、防腐剤、保護コロイド、着色剤、
有機溶剤など公知の添加剤を添加してもよい。
次に例をあげて本発明の組成物をさらに説明す
る。以下「部」、「％」とあるのは重量基準で表わ
したものである。なお以下「充」とあるのは充填
剤、「可」とあるのは「可塑剤」、「分」とあるの
は分散剤、「湿」とあるのは湿潤剤、「増」とある
のは増粘剤、「他」とあるのはその他成分を表わ
すものとする。
例 １
A1：エチレン含量24.2％のエチレン−酢酸ビニル
共重合体のエマルジヨン（アニオン系界面活性
剤及びノニオン系界面活性剤を用い乳化重合し
たもの、樹脂分濃度55.6％、粘度1700cps、Ｋ
値60.4） 50部
A2：エチレン含量18.5％のエチレン−酢酸ビニル
共重合体のエマルジヨン（ポリビニルアルコー
ルを用いて乳化重合したもの、樹脂分濃度55.2
％、粘度6900cps、Ｋ値111.2） 50部
充：炭酸カルシウム 165部
充：酸化チタン ５部
可：ジブチルフタレート 30部
分：ヘキサメタリン酸ソーダ 1.7部
湿：HLB15のポリオキシエチレンノニルフエノ
ールエーテル 1.3部
増：メチルセルロース 0.1部
他：水 ５部
上記各成分を混合して固形分約8.4％、粘度約
40万cpsの組成物を得、各物性を測定した。結果
を第１表に示す。
対照例 １
A150部及びA250部に代えてA1100部のみを用
いたほかは例１と同様にして組成物を得、物性を
測定したが、材料の強度が弱すぎる結果となつ
た。
対照例 ２
A150部及びA250部に代えてA2100部のみを用
いたほかは例１と同様にして組成物を得、物性を
測定したが、伸びが小さく、又材料のモジユラ
ス、強度が高すぎて基材のALCを破壊した。
対照例 ３
A150部及びA250部に代えて、エチレン含量
21.4％のエチレン−酢酸ビニル共重合体のエマル
ジヨン（ポリビニルアルコール、アニオン系界面
活性剤及びノニオン系界面活性剤を用いて乳化重
合したもの、樹脂分濃度55.3％、粘度6500cps、
Ｋ値86.0）100部のみを用いたほかは例１と同様
にして組成物を得、物性を測定したが、伸びが不
足し、又モジユラス、強度が強すぎて基材の
ALC部を破壊した。なおここで用いたエチレン
−酢酸ビニル共重合体エマルジヨンは、エチレン
−酢酸ビニル共重合体のエチレン含量の点及びエ
マルジヨンのＫ値の点で例１で用いたA1とA2と
のほぼ平均的な値を有するものである。
以上対照例１〜３の結果を第１表に示す。
The present invention relates to an aqueous sealant composition containing an ethylene-vinyl acetate copolymer emulsion as a vehicle. Sealants containing water-based emulsion-type resin as a vehicle are used to maintain watertightness and airtightness at joints in buildings, around sash, glass insets, cracks, etc. However, acrylic resin emulsions and ethylene-vinyl acetate copolymer emulsions are known as typical examples of such aqueous emulsions, but sealant compositions using acrylic resin emulsions as a vehicle have alkali resistance and adhesive properties. However, sealant compositions using ethylene-vinyl acetate copolymer emulsion as a vehicle have high modulus and low elongation, making them particularly difficult to use for porous water-absorbing materials such as lightweight foam concrete. The disadvantage is that it is unsuitable for construction materials with high properties. The present invention solves the above-mentioned conventional problems by using two or more specific ethylene-vinyl acetate copolymer emulsions of different types as aqueous emulsions. The aqueous sealant composition of the present invention is a composition containing a synthetic resin emulsion, an inorganic filler, and a plasticizer as essential components, wherein the synthetic resin emulsion is composed of two or more different types of ethylene-vinyl acetate copolymers. It consists of a mixture of emulsions. Here, when the largest amount of ethylene-vinyl acetate copolymer in the mixture is A 1 and the second largest amount of ethylene-vinyl acetate copolymer is A 2 , (i) A 1 and A 2 are both ethylene It is an ethylene-vinyl acetate copolymer with a content of 10 to 30% by weight; (ii) the content of A 1 and A 2 in the mixture is in a weight ratio of
(iii) The ethylene content of A 1 and the ethylene content of A 2 are in the range of 98-50:2-50.
A 1 by weight or more apart or before mixing
It is essential that all three conditions are satisfied: the K value of the emulsion and the K value of the A2 emulsion must be separated by 10 or more. The aqueous sealant composition of the present invention has a low modulus (for example, approximately 1 Kg/cm 2 or less at 50% modulus) and high elongation (for example, approximately 1000% or more), and is highly absorbent for porous materials such as lightweight foam concrete. It has the remarkable effect that it can be suitably applied to construction materials with high densities. The configuration of the present invention will be explained in detail below. First, in the present invention, a mixture of two or more different types of ethylene-vinyl acetate copolymer emulsions is used. The ethylene-vinyl acetate copolymer having the largest amount in the mixture will be referred to as A 1 , A 2 , A 3 . . . in order. The largest component A 1 and the next component A 2 must both be ethylene-vinyl acetate copolymers with an ethylene content of 10 to 30% by weight, and if the ethylene content of at least one is less than 10% by weight, alkali resistance and adhesion the ethylene content of at least one is 30
If it exceeds % by weight, the tackiness becomes excessive. A 1 and
In addition to A 2 , small amounts of components such as A 3 and A 4 may be included, and the ethylene content of these components is not particularly limited, but is within the range of 10 to 30% by weight, similar to A 1 and A 2 . It is desirable to do so. Note that the ethylene content means the average content in the usual sense. The content of the largest component A 1 and the next component A 2 in the mixture is required to be in a weight ratio of 98 to 50:2 to 50. Particularly preferred range is 95-50:5-50
It is. If the amount of A2 is too small relative to A1 , the desired low modulus and high elongation cannot be obtained. Furthermore, A 1 and A 2 must be different varieties in the following respects. That is, the ethylene content of A 1 and the ethylene content of A 2 are different by 3% by weight or more, or the K value of the A 1 emulsion before mixing and the ethylene content of A 2 are different .
The emulsion must meet at least one of the following conditions: the K values are separated by 10 or more. In the former case, if the difference in ethylene content is less than 3% by weight, the desired low modulus and high elongation cannot be obtained. In the latter case, if the difference in K values is less than 10, the desired low modulus and high elongation cannot be obtained. The K values are preferably separated by 20 or more. The difference in K value in the latter case can be adjusted by selecting polymerization conditions, such as by changing the degree of polymerization, or by emulsion polymerization using an emulsifier or protective colloid. Note that the K value is calculated by accurately weighing an emulsion equivalent to 1 g of resin (the number of grams of resin is C), and adding 5 liters of water to it.
After adding cc and dispersing well, add tetrahydrofuran to make a 100 c.c. solution. Measure the viscosity η of this solution at 25°C using an Ostwald viscometer, and conduct a blank test using the same amount of water instead of the emulsion. The viscosity ηo was measured and calculated from the following formula. log(η/ηo)/C=75K 0 2 /1+1.5K 0 C+K 0 K=K 0 ×10 3 The resin concentration of the ethylene-vinyl acetate copolymer emulsion used is not particularly limited, but is 40 to 65% by weight. It is often expressed as a percentage. Ethylene-vinyl acetate copolymer emulsion is obtained by emulsion polymerization of ethylene and vinyl acetate in a conventional manner. At this time, new ethylene,
A so-called seed polymerization method in which emulsion polymerization is performed by adding vinyl acetate and a catalyst may be employed. In the present invention, in addition to the above-mentioned ethylene-vinyl acetate copolymer emulsion, an acrylic resin emulsion or SBR latex can be used in combination with the above-mentioned ethylene-vinyl acetate copolymer emulsion. When used in combination, the amount of other emulsion or latex blended with respect to the ethylene-vinyl acetate copolymer emulsion should be less than the same weight, preferably less than half, in terms of resin proportion, and avoid using too much of the other emulsion or latex. If used in combination, the advantages of the present invention will be diminished. The composition of the present invention essentially contains an inorganic filler and a plasticizer. Inorganic fillers include calcium carbonate, clay,
Examples include titanium oxide, magnesium hydroxide, aluminum hydroxide, talc, carbon black, barium sulfate, silica, iron oxide, zinc oxide, lead oxide, etc., and the blending amount is 100 to 500% of the resin content in the synthetic resin emulsion. Weight%, preferably 200~
It is usually 400% by weight. Examples of plasticizers include polyester plasticizers, phthalate ester plasticizers, epoxy plasticizers, phosphate ester plasticizers, aliphatic dibasic acid ester plasticizers, glycol ester plasticizers, fatty acid ester plasticizers, etc. Among these, it is particularly desirable to use phthalate ester plasticizers, especially those containing at least one butyl group in the molecule. The amount of plasticizer blended is 15 to 80% by weight based on the resin content in the synthetic resin emulsion.
This is usually the case. In addition to the above-mentioned synthetic resin emulsion, inorganic filler and plasticizer, the composition also contains a dispersant, a wetting agent,
It is desirable to add a thickener. Dispersants include tripolyphosphates, hexametaphosphates, polyacrylates, polymethacrylates, etc., and the amount added is usually 2% by weight or less based on the inorganic filler. A nonionic surfactant or the like is used as a wetting agent, and the amount thereof added is usually 3% by weight or less based on the inorganic filler. Thickeners include polyvinyl alcohol, sodium polyacrylate, ammonium polyacrylate,
polyacrylamide, polyvinylpyrrolidone, methylcellulose, carboxymethylcellulose,
Examples include hydroxyethyl cellulose, and the amount added is usually 1% by weight or less compared to the emulsion. The composition of the present invention may further include adhesion improvers, antifoaming agents, preservatives, protective colloids, colorants,
Known additives such as organic solvents may also be added. Next, the composition of the present invention will be further explained by giving examples. Hereinafter, "parts" and "%" are expressed on a weight basis. In addition, below, ``full'' refers to filler, ``permissible'' refers to ``plasticizer,''``minute'' refers to dispersant, ``wet'' refers to wetting agent, and ``increase'' refers to "Other" indicates a thickener, and "other" indicates other ingredients. Example 1 A1 : Emulsion of ethylene-vinyl acetate copolymer with ethylene content of 24.2% (emulsion polymerized using anionic surfactant and nonionic surfactant, resin concentration 55.6%, viscosity 1700 cps, K
Value 60.4) 50 parts A2 : Emulsion of ethylene-vinyl acetate copolymer with ethylene content 18.5% (emulsion polymerized using polyvinyl alcohol, resin concentration 55.2)
%, viscosity 6900 cps, K value 111.2) 50 parts: Calcium carbonate 165 parts: Titanium oxide 5 parts possible: Dibutyl phthalate 30 parts: Sodium hexametaphosphate 1.7 parts Moisture: HLB15 polyoxyethylene nonyl phenol ether 1.3 parts more: Methyl cellulose 0.1 part Others: Water 5 parts Mix the above ingredients to have a solid content of approximately 8.4% and a viscosity of approximately
A composition of 400,000 cps was obtained and its physical properties were measured. The results are shown in Table 1. Control Example 1 A composition was obtained in the same manner as in Example 1 except that only 100 parts of A 1 was used instead of 50 parts of A 1 and 50 parts of A 2 , and the physical properties were measured, but the strength of the material was too weak. Summer. Control Example 2 A composition was obtained in the same manner as in Example 1 except that only 100 parts of A 2 was used instead of 50 parts of A 1 and 50 parts of A 2 , and the physical properties were measured. However, the elongation was small and the modulus of the material was , the strength was too high and destroyed the base material ALC. Control example 3 Ethylene content instead of 50 parts of A 1 and 50 parts of A 2
Emulsion of 21.4% ethylene-vinyl acetate copolymer (emulsion polymerized using polyvinyl alcohol, anionic surfactant and nonionic surfactant, resin concentration 55.3%, viscosity 6500cps,
A composition was obtained in the same manner as in Example 1 except that only 100 parts of K value 86.0) was used, and its physical properties were measured.However, the elongation was insufficient, and the modulus and strength were too strong.
Destroyed the ALC department. The ethylene-vinyl acetate copolymer emulsion used here was approximately the average of A 1 and A 2 used in Example 1 in terms of the ethylene content of the ethylene-vinyl acetate copolymer and the K value of the emulsion. It has a value of The results of Control Examples 1 to 3 are shown in Table 1.
【表】
例 ２〜５
例１においてA1を70部、A2を30部用いた場合
（例２）、A1を90部、A2を10部用いた場合（例３）
についても例１と同様にして組成物を得、物性を
測定した。
例 ４
A1：エチレン含量24.2％のエチレン−酢酸ビニル
共重合体のエマルジヨン（アニオン系界面活性
剤及びノニオン系界面活性剤を用いて乳化重合
したもの、樹脂分55.6％、粘度1700cps、Ｋ値
60.4） 70部
A2：エチレン含量15.7％のエチレン−酢酸ビニル
共重合体のエマルジヨン（ポリビニルアルコー
ル、アニオン系界面活性剤及びノニオン系界面
活性剤を用いて乳化重合したもの、樹脂分濃度
53.0％、粘度4300cps、Ｋ値55.6） 30部
上記A1及びA2を用いたほかは例１と同様にし
て組成物を得、物性を測定した。
例 ５
例４においてA1を50部、A2を25部とし、さら
にアクリル系エマルジヨン（ヘキスト合成株式会
社製モビニール650）25部を用い、他は例４と同
様にして組成物を得、物性を測定した。
以上例２〜５の結果を第２表に示す。[Table] Examples 2 to 5 When using 70 parts of A 1 and 30 parts of A 2 in Example 1 (Example 2), When using 90 parts of A 1 and 10 parts of A 2 (Example 3)
A composition was also obtained in the same manner as in Example 1, and its physical properties were measured. Example 4 A1 : Emulsion of ethylene-vinyl acetate copolymer with an ethylene content of 24.2% (emulsion polymerized using an anionic surfactant and a nonionic surfactant, resin content 55.6%, viscosity 1700 cps, K value
60.4) 70 parts A 2 : Emulsion of ethylene-vinyl acetate copolymer with ethylene content of 15.7% (emulsion polymerized using polyvinyl alcohol, anionic surfactant and nonionic surfactant, resin concentration
53.0%, viscosity 4300 cps, K value 55.6) 30 parts A composition was obtained in the same manner as in Example 1 except that the above A 1 and A 2 were used, and the physical properties were measured. Example 5 In Example 4, A 1 was changed to 50 parts, A 2 was changed to 25 parts, and 25 parts of acrylic emulsion (Movinyl 650 manufactured by Hoechst Gosei Co., Ltd.) were used to obtain a composition in the same manner as in Example 4. was measured. The results of Examples 2 to 5 are shown in Table 2.
【表】
例 ６
A1：エチレン含量24.2％のエチレン−酢酸ビニル
共重合体のエマルジヨン（アニオン系界面活性
剤及びノニオン系界面活性剤を用いて乳化重合
したもの、樹脂分濃度55.6％、粘度1700cps、
Ｋ値60.4） 60部
A2：エチレン含量18.5％のエチレン−酢酸ビニル
共重合体のエマルジヨン（ポリビニルアルコー
ルを用いて乳化重合したもの、樹脂分濃度57.4
％粘度6900cps、Ｋ値111.2） 20部
A3：エチレン含量15.7％のエチレン−酢酸ビニル
共重合体のエマルジヨン（ポリビニルアルコー
ル、アニオン系界面活性剤及びノニオン系界面
活性剤を用いて乳化重合したもの、樹脂分濃度
53.0％、粘度4300cps、Ｋ値55.6） 20部
充：炭酸カルシウム 165部
充：酸化チタン ５部
可：ジブチルフタレート 10部
可：ジオクチルフタレート 15部
分：ヘキサメタリン酸ソーダ 1.7部
湿：HLB15のポリオキシエチレンノニルフエノ
ールエーテル 1.3部
増：ヒドロキシエチルセルロース 0.1部
他：水 ５部
上記各成分を混合して固形分83％、粘度約36万
の組成物を得、各物性を測定した結果、次のよう
なすぐれた結果が得られた。
スランプ ０mm
初期耐水性 優
低温貯蔵安定性（−５℃） 優
タツクフリータイム 25分
比重 1.60
加熱減量 16.5％
硬度 21
収縮率 ７％
50％モジユラス 0.8Kg／cm2
最大引張応力 1.2Kg／cm2
伸び 1100％
接着力 1.1Kg／cm2
同上破壊部 接着剤部[Table] Example 6 A 1 : Emulsion of ethylene-vinyl acetate copolymer with ethylene content of 24.2% (emulsion polymerized using anionic surfactant and nonionic surfactant, resin concentration 55.6%, viscosity 1700 cps) ,
K value 60.4) 60 parts A 2 : Emulsion of ethylene-vinyl acetate copolymer with ethylene content 18.5% (emulsion polymerized using polyvinyl alcohol, resin concentration 57.4)
% viscosity 6900 cps, K value 111.2) 20 parts A 3 : Emulsion of ethylene-vinyl acetate copolymer with ethylene content 15.7% (emulsion polymerized using polyvinyl alcohol, anionic surfactant and nonionic surfactant, Resin concentration
53.0%, viscosity 4300cps, K value 55.6) 20 parts: Calcium carbonate 165 parts: Titanium oxide 5 parts possible: Dibutyl phthalate 10 parts possible: Dioctyl phthalate 15 parts: Sodium hexametaphosphate 1.7 parts Moisture: Polyoxyethylene nonyl with HLB15 Phenol ether 1.3 parts more: Hydroxyethylcellulose 0.1 part Others: Water 5 parts The above ingredients were mixed to obtain a composition with a solid content of 83% and a viscosity of approximately 360,000 yen, and as a result of measuring each physical property, it was found that the following excellent properties were obtained. The results were obtained. Slump 0mm Initial water resistance Low temperature storage stability (-5℃) Easy tack free time 25 minutes Specific gravity 1.60 Loss on heating 16.5% Hardness 21 Shrinkage 7% 50% Modulus 0.8Kg/cm 2 Maximum tensile stress 1.2Kg/cm 2 Elongation 1100% Adhesive strength 1.1Kg/cm 2Damaged part Adhesive part
Claims (1)
剤を必須成分として含む組成物であつて、前記合
成樹脂エマルジヨンが品種の異なる２種以上のエ
チレン−酢酸ビニル共重合体エマルジヨンの混合
物よりなり、該混合物中最も量の多いエチレン−
酢酸ビニル共重合体をA1、次に量の多いエチレ
ン−酢酸ビニル共重合体をA2とするとき、 (i) A1とA2は共にエチレン含量10〜30重量％の
エチレン−酢酸ビニル共重合体であること、 (ii) 前記混合物中のA1とA2の含有量は重量比で
98〜50：２〜50の範囲にあること、 (iii) A1のエチレン含量とA2のエチレン含量は３
重量％以上離れているか、或いは混合前のA1
エマルジヨンのＫ値とA2エマルジヨンのＫ値
は10以上離れていること、 の３条件を全て満足してなる水性シーリング材組
成物。[Scope of Claims] 1. A composition containing a synthetic resin emulsion, an inorganic filler, and a plasticizer as essential components, wherein the synthetic resin emulsion is a mixture of two or more different types of ethylene-vinyl acetate copolymer emulsions. The largest amount of ethylene in the mixture
When vinyl acetate copolymer is A 1 and the next largest amount of ethylene-vinyl acetate copolymer is A 2 , (i) A 1 and A 2 are both ethylene-vinyl acetate with an ethylene content of 10 to 30% by weight. (ii) the content of A 1 and A 2 in the mixture is in a weight ratio;
(iii) The ethylene content of A 1 and the ethylene content of A 2 are in the range of 98-50:2-50.
A 1 by weight or more apart or before mixing
An aqueous sealant composition that satisfies all three conditions: the K value of the emulsion and the K value of the A2 emulsion are 10 or more apart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6987681A JPS57185373A (en) | 1981-05-08 | 1981-05-08 | Water-based sealing composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6987681A JPS57185373A (en) | 1981-05-08 | 1981-05-08 | Water-based sealing composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57185373A JPS57185373A (en) | 1982-11-15 |
| JPH0135868B2 true JPH0135868B2 (en) | 1989-07-27 |
Family
ID=13415415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6987681A Granted JPS57185373A (en) | 1981-05-08 | 1981-05-08 | Water-based sealing composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57185373A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016108364A (en) * | 2014-12-02 | 2016-06-20 | 住友精化株式会社 | ANIONIC AQUEOUS DISPERSION OF α-OLEFIN-VINYL ACETATE-BASED ELASTOMER PARTICLES, METHOD FOR PRODUCING THE SAME, MOLDED PRODUCT AND RESORCIN-FORMALIN-LATEX ADHESIVE AGENT |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57145171A (en) * | 1981-03-05 | 1982-09-08 | Nippon Synthetic Chem Ind Co Ltd:The | Aqueous sealing material composition |
-
1981
- 1981-05-08 JP JP6987681A patent/JPS57185373A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57145171A (en) * | 1981-03-05 | 1982-09-08 | Nippon Synthetic Chem Ind Co Ltd:The | Aqueous sealing material composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57185373A (en) | 1982-11-15 |
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