JPH02135263A - Water absorbing gel composition having excellent light resistance and heat resistance - Google Patents
Water absorbing gel composition having excellent light resistance and heat resistanceInfo
- Publication number
- JPH02135263A JPH02135263A JP63290903A JP29090388A JPH02135263A JP H02135263 A JPH02135263 A JP H02135263A JP 63290903 A JP63290903 A JP 63290903A JP 29090388 A JP29090388 A JP 29090388A JP H02135263 A JPH02135263 A JP H02135263A
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbing
- absorbing gel
- heat resistance
- light resistance
- 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
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 38
- 229920005989 resin Polymers 0.000 claims abstract description 38
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 30
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000006185 dispersion Substances 0.000 claims abstract description 16
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000002250 absorbent Substances 0.000 claims description 20
- 230000002745 absorbent Effects 0.000 claims description 17
- 239000002612 dispersion medium Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 10
- 229920000578 graft copolymer Polymers 0.000 abstract description 5
- 238000003898 horticulture Methods 0.000 abstract 1
- 239000000413 hydrolysate Substances 0.000 abstract 1
- 239000000499 gel Substances 0.000 description 37
- 239000000463 material Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 239000000178 monomer Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- -1 artificial snow Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010413 gardening Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 125000004964 sulfoalkyl group Chemical group 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002386 air freshener Substances 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000007870 radical polymerization initiator Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000012966 redox initiator Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 229920000247 superabsorbent polymer Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の背景〕
利用分野
本発明は、日光に曝露された場合および高温雰囲気下に
おいても経時劣化が極めて小さくて安定である吸水ゲル
組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Background of the Invention] Field of Application The present invention relates to a water-absorbing gel composition that is stable with very little deterioration over time even when exposed to sunlight and in a high temperature atmosphere.
本発明の吸水ゲル組成物は、水不溶性の酸化鉄又は酸化
チタン微粉末を水性分散媒に均一に分散させてなる分散
液を高吸水性樹脂に吸水させる事により得られる物であ
って、光および熱に対して極めて安定であるので、園芸
観賞用保水剤、芳香剤および消臭剤ゲル剤、屋外土木工
事用止水剤、掘削工事用滑剤、蓄冷剤、蓄熱剤、人工雪
、ケミカルカイロ用吸湿成分等の耐久性(耐光、耐熱)
が要求される資材として、各種利用分野において有効に
利用する事が出来るものである。The water-absorbing gel composition of the present invention is obtained by allowing a superabsorbent resin to absorb water from a dispersion obtained by uniformly dispersing water-insoluble iron oxide or titanium oxide fine powder in an aqueous dispersion medium, and It is also extremely stable against heat, so it can be used as a water retaining agent for horticultural ornamentals, air fresheners and deodorizing gels, water stop agents for outdoor civil engineering work, lubricants for excavation work, cold storage agents, heat storage agents, artificial snow, and chemical warmers. Durability of hygroscopic components, etc. (light resistance, heat resistance)
It can be effectively used in various fields of use as a material that requires
従来の技術
近年、自重の数十〜数百倍もの水を吸収する高吸水性の
種々の高分子材料が提案されている。例えば、澱粉グラ
フト重合体(特公昭53−46199号公報等)、セル
ロース変性材(特開昭50−80376号公報等)、水
溶性高分子の架橋物(特公昭43−23462号公報等
)、自己架橋型アクリル酸アルカリ金属塩ポリマー(特
公昭54−30710号公報等)等があり、これらは生
理用品、使いすて紙おむつ等の吸収剤として、あるいは
、費園芸用の保水剤およびその他産業用資材として広範
囲な分野に用途開発が進められている。BACKGROUND OF THE INVENTION In recent years, various highly water-absorbing polymeric materials have been proposed that absorb water tens to hundreds of times their own weight. For example, starch graft polymers (Japanese Patent Publication No. 53-46199, etc.), cellulose modified materials (Japanese Patent Publication No. 50-80376, etc.), crosslinked water-soluble polymers (Japanese Patent Publication No. 43-23462, etc.), There are self-crosslinking type acrylic acid alkali metal salt polymers (Japanese Patent Publication No. 30710/1983), etc., which are used as absorbents for sanitary products, disposable diapers, etc., as water retention agents for gardening, and for other industrial uses. It is being developed for use as a material in a wide range of fields.
しかしながら、これらの高吸水性高分子材料は、多口の
水を吸収する能力および乾燥時での経時安定性は優れて
いるものの、吸水状態での安定性に極めて乏しいもので
ある。例えば、吸水したゲル状物を日光に曝露しておく
と、わずか数時間のうちに劣化して流動化し、ゲル状物
の形態を保持できなくなる事が多い。また、ゲル状物を
物理的な水分蒸発は無い状態で密閉容器等に充填し、高
温(80℃以上)雰囲気下においた場合も数時間から2
4時間程度で同様に劣化してしまうという問題点がある
。However, although these superabsorbent polymer materials have excellent ability to absorb a large amount of water and excellent stability over time when dry, they have extremely poor stability in a water-absorbed state. For example, if a gel-like material that has absorbed water is exposed to sunlight, it often deteriorates and becomes fluid within just a few hours, making it impossible to maintain its gel-like shape. In addition, if a gel-like material is filled into a sealed container etc. without physical water evaporation and left in a high temperature (80°C or higher) atmosphere, it may take several hours to 2 hours.
There is a problem in that it similarly deteriorates after about 4 hours.
したがって、この様な高吸水性樹脂(吸水ゲル)を、特
に園芸鑑賞用保水剤、芳香剤および消臭剤ゲル剤、屋外
土木工事用止水剤、掘削工事用滑剤、蓄冷剤、蓄熱剤、
人工雪、ケミカルカイロ用吸湿成分等の様に耐光性また
は耐熱性の要求される分野に使用する際には、ゲルの耐
久性が充分てないことから、実用上で障害になっている
。Therefore, such super-absorbent resins (water-absorbing gels) can be used, in particular, as water-retaining agents for gardening, aromatic and deodorizing gels, water-stopping agents for outdoor civil engineering work, lubricants for excavation work, cold storage agents, heat storage agents,
When used in fields that require light resistance or heat resistance, such as artificial snow or moisture-absorbing ingredients for chemical body warmers, the gel does not have sufficient durability, which poses a problem in practical use.
従来から、吸水ゲルの耐光性ないし耐熱性を改良す不方
法としては、高吸水性樹脂にカーボンブラックや活性炭
を混合する方法(特開昭59−38271号公報)やア
クリル酸系単量体にコモノマーとしてスルホアルキル(
メタ)アクリレート系単量体を存在させ、架橋剤と共に
重合させて得られた水不溶性吸水性樹脂(特開昭61−
36309号公報)等が有効であることが提案されてい
る。Conventionally, methods for improving the light resistance or heat resistance of water-absorbing gels include mixing carbon black or activated carbon with super absorbent resin (Japanese Patent Laid-Open No. 59-38271), and adding acrylic acid monomers to the water-absorbing gel. Sulfoalkyl (
Water-insoluble water-absorbent resin obtained by polymerizing together with a crosslinking agent in the presence of a meth)acrylate monomer (Japanese Patent Application Laid-open No. 1986-
36309) etc. have been proposed to be effective.
しかし、本発明者らが知る限りでは、これらの方法によ
る吸水ゲルの耐光性および耐熱性の改良効果は未だ小さ
く不充分であって、これらを上記各利用分野において使
用するには、満足できるものとは言い難たかった。However, as far as the present inventors know, the effects of improving the light resistance and heat resistance of water-absorbing gels by these methods are still small and insufficient, and they are not satisfactory for use in each of the above fields of application. It was hard to say.
一般に、吸水樹脂を合成して得るには、高吸水性樹脂の
基体となりうる重合性モノマー(アクリル酸系モノマー
等)に対する混合物(カーボンブラック又は活性炭)や
共重合用モノマー(スルホアルキル(メタ)アクリレー
ト系モノマー等)の添加量には、おのずと制限があって
、耐光性および耐熱性を実用上問題が生じない程度に向
上させるために上記混合物ないし共重合用モノマーを添
加すると、これらの添加物によって別の問題点が顕現化
する。Generally, in order to synthesize and obtain a water-absorbing resin, a mixture (carbon black or activated carbon) and a copolymerizable monomer (sulfoalkyl (meth)acrylate There is a natural limit to the amount of additives such as monomers, etc.), and when the above mixtures or monomers for copolymerization are added to improve light resistance and heat resistance to a level that does not cause practical problems, these additives Another problem emerges.
即ち、従来の方法に従っ゛C十分な耐光性および耐熱性
を付与すべく上記混合物や共重合用モノマーを添加する
と、それらの溶媒への溶解性、反応性(共重合性)等が
十分でないことに基因して、高吸水性樹脂の合成が困難
になり、もし仮に合成しえたとしても、得られた高吸水
性樹脂(混合物含む)は、本来の吸水能力か著しく低下
した物となってしまうからである。また、この様な多量
の混合物等の添加は、コスト的にも有利であるとは言い
難しい。That is, if the above mixture or monomer for copolymerization is added in order to impart sufficient light resistance and heat resistance according to the conventional method, the solubility in the solvent, reactivity (copolymerizability), etc. are insufficient. This makes it difficult to synthesize superabsorbent resins, and even if it were possible to synthesize them, the resulting superabsorbent resins (including mixtures) would have significantly lowered their original water absorption ability. This is because it will be put away. Furthermore, it is difficult to say that the addition of such a large amount of mixture is advantageous in terms of cost.
要旨
本発明者らは、前記の問題点を解決する為に、揮々研究
を重ねた結果、本発明を完成した。Summary The present inventors have completed the present invention as a result of extensive research in order to solve the above-mentioned problems.
従って、本発明による耐光性および耐熱性の優れた吸水
ゲル組成物は、水不溶性の酸化鉄又は酸化チタン微粉末
を水性分散媒に分散させてなる分散液を高吸水性樹脂に
施して水性分散媒を吸水させて得られたものであること
、を特徴とするものである。Therefore, the water-absorbing gel composition of the present invention with excellent light resistance and heat resistance can be obtained by dispersing water-insoluble iron oxide or titanium oxide fine powder in an aqueous dispersion medium and applying it to a superabsorbent resin. It is characterized by being obtained by absorbing water in a medium.
効果
従来の方法は、高吸水性樹脂自身に改良を加え、それに
より得られる吸水ゲルの耐光性等を改良しようと試みた
ものであるのに対して、本発明は、高吸水性樹脂自身は
そのままで通常の一般的な任意の物を使用し、その樹脂
に紫外線および赤外線遮蔽効果を有する酸化鉄又は酸化
チタン微粉末を分散させた分散液を吸収させる事によっ
て、吸水ゲル表面に微粉末を付着させて被覆して、吸水
ゲル組成物の耐光性および耐熱性を向上させようとする
ものである
本発明によれば、酸化鉄または酸化チタンを分散させた
分散液を高吸水性樹脂に施用するという極めて簡単な方
法で優れた耐光性および耐熱性を吸水ゲルに付与するこ
とができるので、コスト的にも有利であると同時に、用
途に応じて微粉末の粒径又は添加量を変化させる事によ
り、その風合い(色)および耐久時間を調整する事が容
易である。従って、用途に応じた吸水ゲル組成物を簡便
かつ容易に得る事が出来る。Effects Conventional methods attempt to improve the light resistance of the water-absorbing gel obtained by improving the superabsorbent resin itself, whereas the present invention improves the superabsorbent resin itself. By using any ordinary material as it is and making the resin absorb a dispersion of iron oxide or titanium oxide fine powder, which has an ultraviolet and infrared shielding effect, the fine powder can be applied to the surface of the water-absorbing gel. According to the present invention, a dispersion in which iron oxide or titanium oxide is dispersed is applied to a super absorbent resin. Excellent light resistance and heat resistance can be imparted to the water-absorbing gel using an extremely simple method, which is advantageous in terms of cost. Therefore, it is easy to adjust its texture (color) and durability time. Therefore, a water-absorbing gel composition suitable for the purpose can be obtained simply and easily.
高吸水性樹脂
本発明に使用される高吸水性樹脂は、水不溶性の高吸水
性樹脂のいずれのものでも使用できる。Super Water Absorbent Resin The super water absorbent resin used in the present invention can be any water-insoluble super water absorbent resin.
好ましい高水性樹脂の具体例を挙げれば、例えば、デン
プン−アクリロニトリルグラフト共重合体の加水分解物
、デンプン−アクリル酸グラフト重合体の中和物、アク
リル酸エステル−酢酸ビニル共重合体のケン化物、架橋
ポリビニルアルコール変性物、架橋ポリエチレンオキン
ド変性物、部分中和ポリ(メタ)アクリル酸塩架橋体、
架橋イソブチレン−無水マレイン酸共重合体等が挙げら
れる。Specific examples of preferred highly aqueous resins include hydrolysates of starch-acrylonitrile graft copolymers, neutralized starch-acrylic acid graft copolymers, saponified acrylic ester-vinyl acetate copolymers, Crosslinked polyvinyl alcohol modified product, crosslinked polyethylene Oquinde modified product, partially neutralized poly(meth)acrylate crosslinked product,
Examples include crosslinked isobutylene-maleic anhydride copolymer.
これらの中でも、本発明ではアクリル酸及び/又はメタ
クリル酸に基づくカルボキシル基及び/又はアルカリ金
属のカルボキシレート基を含有する高吸水性樹脂が特に
好ましい。Among these, superabsorbent resins containing carboxyl groups based on acrylic acid and/or methacrylic acid and/or alkali metal carboxylate groups are particularly preferred in the present invention.
高吸水性樹脂は、粒状ないし塊状で得られることが多い
が、本発明で対象とする高吸水性樹脂はこの様なものに
限定されず、上記の粒状ないし塊状のものを加工あるい
は合成段階での適当な処理によりシート状ないし一定形
態に固定化した物であってもよい。例えば、繊維質シー
トに高吸水性樹脂を与えるモノマー、たとえば、カルボ
キシル基の20〜80%をアルカリ金属で中和した(メ
タ)アクリル酸、の水溶液を含浸させ、適当な手段で重
合させる(たとえば、該水溶液に溶存させておいたラジ
カル重合開始剤またはその一部(たとえば、レドックス
系開始剤の酸化剤成分)の分解)方法によって得たもの
が例示できる。Super absorbent resins are often obtained in the form of granules or blocks, but the super absorbent resins targeted by the present invention are not limited to these types of resins. The material may be fixed in a sheet form or a fixed form by appropriate treatment. For example, a fibrous sheet is impregnated with an aqueous solution of a monomer that provides a superabsorbent resin, such as (meth)acrylic acid in which 20 to 80% of the carboxyl groups are neutralized with an alkali metal, and polymerized by an appropriate method (for example, Examples include those obtained by decomposition of a radical polymerization initiator or a part thereof (for example, an oxidizing agent component of a redox initiator) dissolved in the aqueous solution.
水不溶性の酸化鉄または酸化チタン微粉末本発明で使用
される水不溶性の酸化鉄又は酸化チタンは、紫外線およ
び赤外線遮蔽効果を有する不透明なものであればいずれ
でも使用可能である。Water-insoluble iron oxide or titanium oxide fine powder Any water-insoluble iron oxide or titanium oxide used in the present invention can be used as long as it is opaque and has an ultraviolet and infrared shielding effect.
その様なものとしては、例えば、Fe2O3、F e
OT io 2またはこれらの混合物等が3 4ゝ
挙げられる。Such materials include, for example, Fe2O3, Fe
Examples include OT io 2 or a mixture thereof.
また、その粒径は、それを分散させた分散液を前記高吸
水性樹脂に施用するまでの間、実質的に均一な分散状態
が保たれる程度の微細な物であれば良い。具体的な粒径
は、施用すべき高吸水性樹脂の種類、粒径、状態あるい
は用途によって異なるか、通常、5μm以下の物であれ
ば好適に使用出来る。Further, the particle size may be fine enough to maintain a substantially uniform dispersion state until the dispersion liquid in which the particles are dispersed is applied to the superabsorbent resin. The specific particle size varies depending on the type, particle size, condition, or purpose of the superabsorbent resin to be applied, and generally, particles of 5 μm or less can be suitably used.
吸水ゲル組成物の製造法
本発明による耐光性および耐熱性の優れた吸水ゲル組成
物は、前述の水不溶性の酸化鉄又は酸化チタン微粉末を
先ず水性液体中に投入し、例えば攪拌する事により分散
させ、次いでこの分散液を高吸水性樹脂に施すことによ
って製造することができる。分散液の施用は攪拌をつづ
けながらその中に高吸水性樹脂を投入してもよいし、ま
た、同吸水性樹脂に分散液を注入してもよい。分散液の
施用量も任意であり、各種高吸水性樹脂毎の吸水能力に
応じてその飽和吸水量あるいは飽和吸水量以下の任意の
量の分散液を施こす事により、目的とする耐光性および
耐熱性の優れた吸水ゲル組成物を得ることができる。な
お、酸化鉄ないし酸化チタンの分散液を構成すべき分散
媒は、高吸水性樹脂に吸収されるものであることが好ま
しく、従って、水性液体、すなわち水または水溶性有機
溶剤の水溶液、が好ましい。Manufacturing method of water-absorbing gel composition The water-absorbing gel composition of the present invention with excellent light resistance and heat resistance can be produced by first adding the water-insoluble iron oxide or titanium oxide fine powder to an aqueous liquid and stirring, for example. It can be produced by dispersing and then applying this dispersion to a superabsorbent resin. The dispersion may be applied by adding the super absorbent resin into it while stirring continuously, or by pouring the dispersion into the water absorbent resin. The application amount of the dispersion liquid is also arbitrary, and the desired light resistance and A water-absorbing gel composition with excellent heat resistance can be obtained. The dispersion medium constituting the dispersion of iron oxide or titanium oxide is preferably one that is absorbed by the superabsorbent resin, and is therefore preferably an aqueous liquid, that is, an aqueous solution of water or a water-soluble organic solvent. .
酸化鉄又は酸化チタンと、高吸水性樹脂との重量比は、
本発明の趣旨に反しない限り特に限定はない。重量比が
大きな程、吸水ゲル組成物の耐光性および耐熱性は向上
するが、しかしあまり大になると、コスト面で有利でな
くなる。本発明で好ましい重量比は、吸水性樹脂1に対
して0. 1〜1である。The weight ratio of iron oxide or titanium oxide and super absorbent resin is:
There is no particular limitation unless it goes against the spirit of the present invention. The larger the weight ratio, the better the light resistance and heat resistance of the water-absorbing gel composition, but if it becomes too large, it will not be advantageous in terms of cost. A preferable weight ratio in the present invention is 0.1 to 1 water absorbent resin. 1-1.
この様にして得られた吸水ゲル組成物は、酸化鉄または
酸化チタン微粉末が吸水性樹脂の表面部に付着したもの
ないし酸化鉄または酸化チタン微粉末と吸水ゲルとの混
和物である。The water-absorbing gel composition thus obtained is one in which iron oxide or titanium oxide fine powder is attached to the surface of a water-absorbing resin, or a mixture of iron oxide or titanium oxide fine powder and water-absorbing gel.
実施例1
酸化第二鉄粉末(平均粒径2μm以下)0.3gをイオ
ン交換水100g中に添加し、攪拌して、均−な分散液
を調製した。次にその分散液中に部分中和ポリアクリル
酸ナトリウム架橋体を主成分とする市販品の高吸水性樹
脂(商品名「ダイヤウェット」三菱油化株式会社製)I
gを投入し、分散液100g全部を吸水させた。得られ
た吸水ゲル(1)は赤褐色を何した小球状物の集合体で
あった。Example 1 0.3 g of ferric oxide powder (average particle size of 2 μm or less) was added to 100 g of ion-exchanged water and stirred to prepare a uniform dispersion. Next, a commercially available super-absorbent resin (trade name "Diawet" manufactured by Mitsubishi Yuka Co., Ltd.) I containing a partially neutralized sodium polyacrylate crosslinked product as a main component is added to the dispersion.
g was added, and all 100 g of the dispersion liquid was absorbed. The obtained water-absorbing gel (1) was an aggregate of small spherules with a reddish-brown color.
実施例2
実施例1の酸化第二鉄粉末を使用するかわりに、酸化チ
タン粉末(ルチル型 平均粒径2μm以下)を用いる他
は、実施例1と同様の手法にて白色の小球状の吸水ゲル
(吸水ゲル(2))を得た。Example 2 The same method as in Example 1 was used except that titanium oxide powder (rutile type, average particle size 2 μm or less) was used instead of the ferric oxide powder in Example 1, to form small white spherical water absorbers. A gel (water-absorbing gel (2)) was obtained.
酸化チタン粉末(アナターゼ型 平均粒径2μm以F)
を用いて白色の小球状の吸水ゲル(吸水ゲル(3))を
得た。Titanium oxide powder (anatase type, average particle size 2 μm or more F)
A white small spherical water-absorbing gel (water-absorbing gel (3)) was obtained using the following method.
実施例3
実施例1の高吸水性樹脂のダイヤウェットを用いるかわ
りに、デンプン−アクリル酸グラフト重合物の加水分解
物を主成分とする市販品の高吸水性樹脂(商品名[サン
ウェッl−IMJ三洋化成工業株式会社製)を用いる他
は実施例1と同様の手法にて赤褐色の不定形状の吸水ゲ
ル(吸水ゲル(4))を得た。Example 3 Instead of using the super absorbent resin Diawet in Example 1, a commercially available super absorbent resin (trade name: Sunwet-IMJ) containing a hydrolyzate of starch-acrylic acid graft polymer as the main component was used. A reddish-brown, irregularly shaped water-absorbing gel (water-absorbing gel (4)) was obtained in the same manner as in Example 1, except that water-absorbing gel (manufactured by Sanyo Chemical Industries, Ltd.) was used.
比較例1
イオン交換水100g中に、実施例1で用いた物と同様
の高吸水性樹脂「ダイヤウェット」1g:を投入して吸
水させて、透明の小球状の吸水ゲル(比較ゲル(1))
を得た。Comparative Example 1 1 g of super absorbent resin "Diawet" similar to that used in Example 1 was added to 100 g of ion-exchanged water to absorb water, and a transparent small spherical water absorbing gel (comparative gel (1 ))
I got it.
比較例2
イオン交換水100g中に実施例3で用いた物と同様の
高吸水性樹脂[サンウェットJigを投入して吸水させ
て透明の小球状の吸水ゲル(比較ゲル(2))を得た。Comparative Example 2 A super absorbent resin similar to that used in Example 3 [Sunwet Jig was added to 100 g of ion-exchanged water to absorb water to obtain a transparent small spherical water absorbing gel (comparative gel (2)). Ta.
耐光性テスト(1)
実施例1〜4及び比較例1.2の各秤吸水ゲルを、各々
50gづつ、厚さ30μmの透明なポリエチレン製の袋
に入れて、夏場(7月〜8月)の日光に曝露した。その
際の吸水ゲルの様子を経時的に観察した。表−1は得ら
れた結果を示すものである。Light resistance test (1) 50 g of each of the scale water-absorbing gels of Examples 1 to 4 and Comparative Example 1.2 was placed in a transparent polyethylene bag with a thickness of 30 μm, and placed in a bag made of transparent polyethylene in the summer (July to August). exposed to sunlight. The appearance of the water-absorbing gel was observed over time. Table 1 shows the results obtained.
耐熱性テスト(2)
実施例1〜4及び比較例1.2の各種吸水ゲルを各々5
0gづつガラスびんに入れフタをして90°Cの恒温槽
に入れて吸水ゲルの様子を経時的に観察した。表−2は
得られた結果を示すもので表−1
耐光性テスト(1)
表−2
耐熱性テスト(2)
上記の表−1および表−2中における記号は、吸水ゲル
の状態を示すものであって、その意味するところは下記
の通りである。Heat resistance test (2) 5 each of the various water-absorbing gels of Examples 1 to 4 and Comparative Examples 1.2
0 g each was placed in a glass bottle, capped, and placed in a constant temperature bath at 90°C, and the appearance of the water-absorbing gel was observed over time. Table-2 shows the results obtained.Table-1 Light resistance test (1) Table-2 Heat resistance test (2) The symbols in Table-1 and Table-2 above indicate the state of the water-absorbing gel. The meaning is as follows.
硬いゲル状
柔らかいゲル状
一部溶解
全体が溶解
(初期の状態を保持している)
(やや劣化し始めている)
(柔らかいゲル状を含み劣化が大部進んでいる)(水溶
液状になってしまっている)Hard gel-like Soft gel-like Partially dissolved (Retains initial state) (Starts to deteriorate slightly) (Deterioration has progressed to a large extent including soft gel-like state) (Turns into aqueous solution) ing)
Claims (1)
分散させてなる分散液を高吸水性樹脂に施して水性分散
媒を吸収させて得られたものであることを特徴とする、
耐光性および耐熱性の優れた吸水ゲル組成物。It is characterized by being obtained by applying a dispersion obtained by dispersing water-insoluble iron oxide or titanium oxide fine powder in an aqueous dispersion medium to a super absorbent resin to absorb the aqueous dispersion medium.
A water-absorbing gel composition with excellent light resistance and heat resistance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63290903A JPH02135263A (en) | 1988-11-17 | 1988-11-17 | Water absorbing gel composition having excellent light resistance and heat resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63290903A JPH02135263A (en) | 1988-11-17 | 1988-11-17 | Water absorbing gel composition having excellent light resistance and heat resistance |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02135263A true JPH02135263A (en) | 1990-05-24 |
Family
ID=17762001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63290903A Pending JPH02135263A (en) | 1988-11-17 | 1988-11-17 | Water absorbing gel composition having excellent light resistance and heat resistance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02135263A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04114738A (en) * | 1990-09-05 | 1992-04-15 | Nippon Shokubai Co Ltd | Preparation of water-absorbing composite |
JPH04114740A (en) * | 1990-09-05 | 1992-04-15 | Nippon Shokubai Co Ltd | Preparation of water-absorbing polymer composite |
JPH06306202A (en) * | 1993-04-23 | 1994-11-01 | Mitsubishi Petrochem Co Ltd | Highly water absorbing polymer composition |
WO2009072232A1 (en) * | 2007-12-07 | 2009-06-11 | Sanyo Chemical Industries, Ltd. | Water-holding material and water-absorbing gel composition excellent in light resistance |
WO2019049651A1 (en) * | 2017-09-07 | 2019-03-14 | 信越化学工業株式会社 | Photocurable composition, hydrogel, and molded article thereof |
WO2020262382A1 (en) | 2019-06-28 | 2020-12-30 | 株式会社クラレ | Water-absorbent copolymer |
CN113631589A (en) * | 2019-03-29 | 2021-11-09 | 住友精化株式会社 | Water-absorbent resin and water-blocking material |
-
1988
- 1988-11-17 JP JP63290903A patent/JPH02135263A/en active Pending
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04114738A (en) * | 1990-09-05 | 1992-04-15 | Nippon Shokubai Co Ltd | Preparation of water-absorbing composite |
JPH04114740A (en) * | 1990-09-05 | 1992-04-15 | Nippon Shokubai Co Ltd | Preparation of water-absorbing polymer composite |
JPH0698306B2 (en) * | 1990-09-05 | 1994-12-07 | 株式会社日本触媒 | Manufacturing method of water-absorbent composite |
JPH06104198B2 (en) * | 1990-09-05 | 1994-12-21 | 株式会社日本触媒 | Manufacturing method of water-absorbing polymer composite |
JPH06306202A (en) * | 1993-04-23 | 1994-11-01 | Mitsubishi Petrochem Co Ltd | Highly water absorbing polymer composition |
WO2009072232A1 (en) * | 2007-12-07 | 2009-06-11 | Sanyo Chemical Industries, Ltd. | Water-holding material and water-absorbing gel composition excellent in light resistance |
JPWO2009072232A1 (en) * | 2007-12-07 | 2011-04-21 | 三洋化成工業株式会社 | Water-retaining agent and water-absorbing gel composition excellent in light resistance |
WO2019049651A1 (en) * | 2017-09-07 | 2019-03-14 | 信越化学工業株式会社 | Photocurable composition, hydrogel, and molded article thereof |
US11987688B2 (en) | 2017-09-07 | 2024-05-21 | Shin-Etsu Chemical Co., Ltd. | Photocurable composition, a hydrogel and a molded product thereof |
CN113631589A (en) * | 2019-03-29 | 2021-11-09 | 住友精化株式会社 | Water-absorbent resin and water-blocking material |
EP3950729A4 (en) * | 2019-03-29 | 2022-12-28 | Sumitomo Seika Chemicals Co., Ltd. | Water-absorbing resin and water-blocking material |
WO2020262382A1 (en) | 2019-06-28 | 2020-12-30 | 株式会社クラレ | Water-absorbent copolymer |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4001350B2 (en) | Liquid absorbing polymer, its production method and its application | |
US4735987A (en) | Method for manufacture of high-expansion type absorbent polymer | |
GB1589975A (en) | Water absorbent polymers | |
US20080187755A1 (en) | Polyamine-Coated Superabsorbent Polymers | |
CA2496448A1 (en) | Water absorbing agent and method for the production thereof | |
CN1239487A (en) | Absorbent compsn. | |
JPH0625543A (en) | Polymer composition for absorbing liquid containing protein | |
JP2008528752A (en) | Polyamine-coated super absorbent polymer | |
IL110134A (en) | Polymers capable of absorbing aqueous liquids and body fluids their preparation and use | |
TW200530127A (en) | Hydrogel capable of absorbing blood and/or body fluids | |
JPH0615574B2 (en) | Method for producing water absorbent resin | |
JPH0725810B2 (en) | Super absorbent resin manufacturing method | |
JPH0639486B2 (en) | Super absorbent resin manufacturing method | |
JPH0639487B2 (en) | Super absorbent resin manufacturing method | |
JPH02135263A (en) | Water absorbing gel composition having excellent light resistance and heat resistance | |
JP2509087B2 (en) | Water absorbent resin, manufacturing method and water absorbent, water retention agent | |
JP2000230129A (en) | Water-absorbent composition | |
JP3461860B2 (en) | Manufacturing method of absorbent material | |
JPH0639485B2 (en) | Water absorbent resin manufacturing method | |
JP4550256B2 (en) | Manufacturing method of water absorbent resin | |
JP3091215B2 (en) | Absorbent resin | |
JPH0248292B2 (en) | ||
JPH05320270A (en) | Production of water-absorptive polymer | |
JP2679732B2 (en) | Water absorbing gel composition with excellent light resistance and heat resistance | |
JPH02292341A (en) | Water-absorptive gel composition of excellent heat resistance |