JP7047310B2 - 紙力増強剤及び紙 - Google Patents
紙力増強剤及び紙 Download PDFInfo
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- JP7047310B2 JP7047310B2 JP2017189163A JP2017189163A JP7047310B2 JP 7047310 B2 JP7047310 B2 JP 7047310B2 JP 2017189163 A JP2017189163 A JP 2017189163A JP 2017189163 A JP2017189163 A JP 2017189163A JP 7047310 B2 JP7047310 B2 JP 7047310B2
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- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 235000010103 Metroxylon rumphii Nutrition 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 description 1
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 244000098338 Triticum aestivum Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 159000000021 acetate salts Chemical class 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 235000019418 amylase Nutrition 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 1
- JZQAAQZDDMEFGZ-UHFFFAOYSA-N bis(ethenyl) hexanedioate Chemical compound C=COC(=O)CCCCC(=O)OC=C JZQAAQZDDMEFGZ-UHFFFAOYSA-N 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 239000010897 cardboard waste Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- HJWBBBADPXPUPA-UHFFFAOYSA-N ethyl 3-(4-chlorophenyl)-5-methyl-1,2-oxazole-4-carboxylate Chemical compound CCOC(=O)C1=C(C)ON=C1C1=CC=C(Cl)C=C1 HJWBBBADPXPUPA-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- VPASWAQPISSKJP-UHFFFAOYSA-N ethyl prop-2-enoate;isocyanic acid Chemical compound N=C=O.CCOC(=O)C=C VPASWAQPISSKJP-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- LDHQCZJRKDOVOX-IHWYPQMZSA-N isocrotonic acid Chemical class C\C=C/C(O)=O LDHQCZJRKDOVOX-IHWYPQMZSA-N 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 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
- HNEGQIOMVPPMNR-NSCUHMNNSA-N mesaconic acid Chemical compound OC(=O)C(/C)=C/C(O)=O HNEGQIOMVPPMNR-NSCUHMNNSA-N 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- HNEGQIOMVPPMNR-UHFFFAOYSA-N methylfumaric acid Natural products OC(=O)C(C)=CC(O)=O HNEGQIOMVPPMNR-UHFFFAOYSA-N 0.000 description 1
- OVHHHVAVHBHXAK-UHFFFAOYSA-N n,n-diethylprop-2-enamide Chemical compound CCN(CC)C(=O)C=C OVHHHVAVHBHXAK-UHFFFAOYSA-N 0.000 description 1
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Chemical compound CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000013054 paper strength agent Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 125000005385 peroxodisulfate group Chemical group 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- FZYCEURIEDTWNS-UHFFFAOYSA-N prop-1-en-2-ylbenzene Chemical compound CC(=C)C1=CC=CC=C1.CC(=C)C1=CC=CC=C1 FZYCEURIEDTWNS-UHFFFAOYSA-N 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical compound OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- GRPURDFRFHUDSP-UHFFFAOYSA-N tris(prop-2-enyl) benzene-1,2,4-tricarboxylate Chemical compound C=CCOC(=O)C1=CC=C(C(=O)OCC=C)C(C(=O)OCC=C)=C1 GRPURDFRFHUDSP-UHFFFAOYSA-N 0.000 description 1
- KAKZBPTYRLMSJV-UHFFFAOYSA-N vinyl-ethylene Natural products C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 1
- NLVXSWCKKBEXTG-UHFFFAOYSA-N vinylsulfonic acid Chemical compound OS(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Description
(メタ)アクリルアミド(b1)を含むモノマー成分(B1)又はその重合体(B2)のいずれか一方との反応生成物を含む紙力増強剤。
・(b1)成分:通常は70~99.5モル%程度、好ましくは79.5~99モル%程度、より好ましくは83.5~98.5モル%程度
・(b2)成分:通常は0.5~30モル%程度、好ましくは1~20モル%程度、より好ましくは1.5~15モル%程度
・(b1)成分:通常は75~99.5モル%程度、好ましくは79.5~99モル%程度、より好ましくは83.5~98.5モル%程度
・(b3)成分:通常は0.5~25モル%程度、好ましくは0.8~20モル%程度、より好ましくは1~15モル%程度
・(b1)成分:通常は45~99モル%程度、好ましくは60~98モル%程度、より好ましくは75~97モル%程度
・(b2)成分:通常は0.5~30モル%程度、好ましくは1~20モル%程度、より好ましくは1.5~15モル%程度
・(b3)成分:通常は0.5~25モル%程度、好ましくは0.8~20モル%程度、より好ましくは1~15モル%程度
AA:アクリル酸
IA:イタコン酸
DM:N,N-ジメチルアミノエチル(メタ)アクリレート
DML:DMの塩化ベンジル4級化物
DMAA:N,N-ジメチルアクリルアミド
SMAS:メタリルスルホン酸ナトリウム
APS:過硫酸アンモニウム
GMA:グリシジルメタクリレート
GA:グリシジルアクリレート
MAA:無水マレイン酸
IAA:無水イタコン酸
IEMA:イソシアネートエチルメタクリレート
PO:プロピレンオキシド
ブルックフィールド型粘度計(東機産業(株)製)を用いて、25℃に調整したサンプルの粘度を測定した。
(重量平均分子量)
ゲルパーメーションクロマトグラフィー(GPC)法により、以下の測定条件で分子量を測定した。
GPC本体:東ソー(株)製
カラム:東ソー(株)製ガードカラムPWXL1本およびGMPWXL2本(温度40℃)
溶離液:0.5mol/L酢酸緩衝液(0.5mol/L酢酸(和光純薬工業(株)製)+0.5mol/L酢酸ナトリウム(キシダ化学(株)製)水溶液、pH約4.2)
流速:0.8mL/分
検出器:
ビスコテック社製TDA MODEL301(濃度検出器および90°光散乱検出器および粘度検出器(温度40℃))RALLS法
測定サンプル:サンプル濃度を0.5%に調整した後、カチオン性成分を含む場合はpH10~12になるまで水酸化ナトリウム水溶液を添加し、80℃以上の湯浴に1時間浸した後、硫酸でpH6~8に調整し、溶離液で0.025%に希釈して測定した。
撹拌機、温度計、還流冷却管、窒素ガス導入管を備えた反応装置に、固形分濃度88%のコーン澱粉(商品名『コーンスターチ』、王子コーンスターチ(株)製)100.0部、α-アミラーゼ(商品名『クライスターゼL1』、天野エンザイム(株)製)0.03部、およびイオン交換水480部を加えて、75℃に昇温し、40分撹拌後、90℃に昇温して更に10分間撹拌した。30℃へ冷却した後、48%水酸化ナトリウムでpH11になるように調整し、GMA1.0部を添加した。さらに、30℃にて1時間撹拌し、濃度が15%になるようにイオン交換水で希釈して、(A-1)成分を得た。得られた澱粉(A-1)の粘度を表1に示す(以下同様)。
表1に示す組成にして、合成例1と同様の方法で合成し、(A-2)~(A-7)、(A-10)~(A-13)成分を得た。
撹拌機、温度計、還流冷却管、窒素ガス導入管を備えた反応装置に、固形分濃度88%のコーン澱粉(商品名『コーンスターチ』、王子コーンスターチ(株)製)100.0部、およびイオン交換水480部を加えて、90℃に昇温して更に10分間撹拌した。30℃へ冷却した後、48%水酸化ナトリウムでpH11になるように調整し、GMA1.0部を添加した。さらに、30℃にて1時間撹拌し、濃度が15%になるようにイオン交換水で希釈して、(A-8)成分を得た。
撹拌機、温度計、還流冷却管、窒素ガス導入管を備えた反応装置に、固形分濃度88%のコーン澱粉(商品名『コーンスターチ』、王子コーンスターチ(株)製)100.0部、APS1.0部、およびイオン交換水480部を加えて、90℃に昇温し、40分撹拌した。30℃へ冷却した後、48%水酸化ナトリウムでpH11になるように調整し、GMA1.0部を添加した。さらに、30℃にて1時間撹拌し、濃度が15%になるようにイオン交換水で希釈して、(A-9)成分を得た。
撹拌機、温度計、還流冷却管、窒素ガス導入管および3つの滴下ロートを備えた反応装置に、固形分濃度88%のコーン澱粉(商品名『コーンスターチ』、王子コーンスターチ(株)製)100部、αアミラーゼ(商品名『クライスターゼL1』、天野エンザイム(株)製)0.03部、およびイオン交換水480部を加えて、75℃に昇温し、40分撹拌後、90℃に昇温して更に10分間撹拌し、濃度が15%になるようにイオン交換水で希釈して、(C-1)成分を得た。
(a1)成分をPOに変える以外は、合成例1と同様に合成し、(C-2)成分を得た。
比較合成例1において、原料澱粉の種類をカチオン化澱粉(商品名『CS-1』、荒川化学工業(株)製)に変えて合成し、(C-3)成分を得た。
撹拌機、温度計、還流冷却管、窒素ガス導入管および2つの滴下ロートを備えた反応装置に、イオン交換水268.4部を入れ、窒素ガスを通じて反応系内の酸素を除去した後、85℃まで加熱した。別途、滴下ロート(1)に50%AM水溶液284.8部、IA10.4部、80%AA9.6部、DM41.8部、60%DML62.8部、SMAS8.8部、DMAA1.32部およびイオン交換水193.1部、先に調製した(A-1)成分416.7部を仕込んだ。また、滴下ロート(2)にAPS0.2部とイオン交換水60部を仕込んだ。次に、滴下ロート(1)および(2)より反応装置に3時間かけて滴下した。滴下終了後、APS0.1部とイオン交換水5.0部を入れ1時間撹拌した。75℃へ冷却してAPS0.1部とイオン交換水5.0部を入れ1時間撹拌した後、濃度が20%となるようにイオン交換水で希釈し、反応生成物を得た。
表2に示す組成にして、製法1で合成し、反応生成物をそれぞれ得た。
撹拌機、温度計、還流冷却管、窒素ガス導入管および2つの滴下ロートを備えた反応装置に、イオン交換水300.0部を入れ、窒素ガスを通じて反応系内の酸素を除去した後、85℃まで加熱した。別途、滴下ロート(1)に50%AM水溶液284.8部、IA10.4部、80%AA9.6部、DM41.8部、60%DML62.8部、SMAS8.8部、DMAA1.32部およびイオン交換水193.1部を仕込んだ。また、滴下ロート(2)にAPS0.2部とイオン交換水60部を仕込んだ。次に、滴下ロート(1)および(2)より反応装置に3時間かけて滴下した。滴下終了後、APS0.1部とイオン交換水5.0部を入れ1時間撹拌し、重合体(B2-1)を得た。これに先に調製した(A-1)成分416.7部を添加した後、75℃へ冷却してAPS0.1部とイオン交換水5.0部を入れ1時間撹拌した後、濃度が20%となるようにイオン交換水で希釈し、反応生成物を得た。
以下、表2に示す組成にして、製法2でそれぞれ合成し、反応生成物を得た。
撹拌機、温度計、還流冷却管、窒素ガス導入管および2つの滴下ロートを備えた反応装置に、先に調製した(A-1)成分416.7部を入れ、窒素ガスを通じて反応系内の酸素を除去した後、85℃まで加熱した。別途、滴下ロート(1)に50%AM水溶液284.8部、IA10.4部、80%AA9.6部、DM41.8部、60%DML62.8部、SMAS8.8部、DMAA1.32部およびイオン交換水193.1部を仕込んだ。また、滴下ロート(2)にAPS0.2部とイオン交換水60部を仕込んだ。次に、滴下ロート(1)および(2)より反応装置に3時間かけて滴下した。滴下終了後、APS0.1部とイオン交換水5.0部を入れ1時間撹拌した。75℃へ冷却してAPS0.1部とイオン交換水5.0部を入れ1時間撹拌した後、濃度が20%となるようにイオン交換水で希釈し、反応生成物を得た。
表3に示す組成にして、実施例1-31同様に合成し、反応生成物をそれぞれ得た。
段ボール古紙をナイアガラ式ビーターにて叩解し、カナディアン・スタンダード・フリーネス(C.S.F)370mlに調整したパルプに硫酸バンドを1.5%添加して、pH調整のために5%水酸化ナトリウム水溶液を添加しpH6.7とした。次に各実施例及び比較例で得られた各反応生成物を紙力増強剤として対パルプ1.0%を添加して、撹拌した後、タッピ・シートマシンにて、坪量180g/m2となるよう抄紙し5kg/cm2で2分間プレス脱水をした。次いで、回転型乾燥機で105℃において3分間乾燥し、温度20℃、湿度65%の条件下にて24時間調湿した。
(比破裂強度)
前記方法で得られた各試験用紙を用い、JIS P 8131に準拠して測定し、比破裂強度(kPa・m2/g)で示した。結果を表4及び5に示す。(以下同様)
(比引張強度)
前記方法で得られた各試験用紙を用い、JIS P 8113に準拠して測定し、比引張強度(N・m/g)で示した。
(比圧縮強度)
前記方法で得られた各試験用紙を用い、JIS P 8126に準拠して測定し、比圧縮強度(N・m2/g)で示した。
(塗工液の調製)
表6に示す反応生成物を紙力増強剤として、濃度5%になるよう、イオン交換水でそれぞれ希釈し、塗工液をそれぞれ調製した。
段ボール古紙パルプを抄いて得た原紙(坪量150g/m2)に、50℃に加温した前記塗工液を固形付着量0.50g/m2となるよう、バーコーターで原紙の両面に塗工し、105℃の回転式ドラムドライヤーで1分間乾燥させて塗工紙を得た。なお、塗工液の固形付着量は、塗工前後の板紙の重量より計算した値である。
B型粘度計(東機産業(株)製)を用いて、50℃に加温した前記塗工液(濃度5.0%)の粘度を測定した。結果を表6に示す(以下同様)。
前記方法で得られた各試験用紙を用い、JIS P 8126に準拠して測定し、比圧縮強度(N・m2/g)で示した。
(内部強度)
前記方法で得られた各塗工紙を用い、J.Tappi No.18-2に準拠して、内部強度(N/m)を測定した。
Claims (6)
- 分子内に(メタ)アクリレート基を有する澱粉(A)と、
(メタ)アクリルアミド(b1)を含むモノマー成分(B1)又はその重合体(B2)のいずれか一方との反応生成物を含み、
(A)成分が、(メタ)アクリレート基を有する成分(a1)と、原料澱粉との反応生成物であり、
(a1)成分が、不飽和グリシジル及び不飽和イソシアネートからなる群より選ばれる1種である、紙力増強剤。 - (A)成分の原料澱粉が、酵素減成澱粉である請求項1の紙力増強剤。
- (B1)成分が、(メタ)アクリルアミド(b1)、並びにカチオン性ビニルモノマー(b2)及び/又はアニオン性ビニルモノマー(b3)を含む請求項1又は2の紙力増強剤。
- 更に、架橋性ビニルモノマー(b4)及び/又は連鎖移動剤(b5)を含む請求項3の紙力増強剤。
- 濃度20重量%、温度25℃における粘度が100~30,000mPa・sである請求項1~4のいずれかの紙力増強剤。
- 請求項1~5のいずれかの紙力増強剤を含む紙。
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