US3475190A - Optical brightening of paper - Google Patents
Optical brightening of paper Download PDFInfo
- Publication number
- US3475190A US3475190A US598640A US3475190DA US3475190A US 3475190 A US3475190 A US 3475190A US 598640 A US598640 A US 598640A US 3475190D A US3475190D A US 3475190DA US 3475190 A US3475190 A US 3475190A
- Authority
- US
- United States
- Prior art keywords
- paper
- liquor
- optical
- brightening
- coating
- 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 - Lifetime
Links
- 230000003287 optical effect Effects 0.000 title description 15
- 238000005282 brightening Methods 0.000 title description 10
- 239000000123 paper Substances 0.000 description 29
- 238000000576 coating method Methods 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 9
- 229920002472 Starch Polymers 0.000 description 8
- 239000000049 pigment Substances 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 8
- 239000008107 starch Substances 0.000 description 8
- 235000019698 starch Nutrition 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 6
- 239000000080 wetting agent Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 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 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical class [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 3
- CIUQDSCDWFSTQR-UHFFFAOYSA-N [C]1=CC=CC=C1 Chemical class [C]1=CC=CC=C1 CIUQDSCDWFSTQR-UHFFFAOYSA-N 0.000 description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 3
- 239000011111 cardboard Substances 0.000 description 3
- 239000005018 casein Substances 0.000 description 3
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 3
- 235000021240 caseins Nutrition 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- -1 glycol ethers Chemical class 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 125000001424 substituent group Chemical group 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229920000151 polyglycol Polymers 0.000 description 2
- 239000010695 polyglycol Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 239000012463 white pigment Substances 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- VGRFLABBLVKUGG-UHFFFAOYSA-N 2-[2-(2-sulfophenyl)-1,2-bis(1,3,5-triazin-2-ylamino)ethenyl]benzenesulfonic acid Chemical class OS(=O)(=O)C1=CC=CC=C1C(NC=1N=CN=CN=1)=C(C=1C(=CC=CC=1)S(O)(=O)=O)NC1=NC=NC=N1 VGRFLABBLVKUGG-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical class [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229940009868 aluminum magnesium silicate Drugs 0.000 description 1
- WMGSQTMJHBYJMQ-UHFFFAOYSA-N aluminum;magnesium;silicate Chemical compound [Mg+2].[Al+3].[O-][Si]([O-])([O-])[O-] WMGSQTMJHBYJMQ-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- IDLFZVILOHSSID-OVLDLUHVSA-N corticotropin Chemical compound C([C@@H](C(=O)N[C@@H](CO)C(=O)N[C@@H](CCSC)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1NC=NC=1)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](C(C)C)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CC=1C=CC(O)=CC=1)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CC(N)=O)C(=O)NCC(=O)N[C@@H](C)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(=O)N[C@@H](C)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](C)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(O)=O)NC(=O)[C@@H](N)CO)C1=CC=C(O)C=C1 IDLFZVILOHSSID-OVLDLUHVSA-N 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical class CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000019830 sodium polyphosphate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000004408 titanium dioxide 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
- D21H21/30—Luminescent or fluorescent substances, e.g. for optical bleaching
Definitions
- ABSTRACT OF THE DISCLOSURE Paper is optically brightened by coating the surface (A) i n the so-called starch-size process inside the paof the paper with an amount to efiectively optically .per machine, e.g. inasizing press, or
- the phenyl radical is unsubstituted. of'degraded starch.
- wetting agents e.g.
- optical brightening of paper particularly by the surface
- the liquor usable for this purpose as well coating liquor is used which contains, per litre, e.g. 0.2- as, an industrial product, the paper having a content of I 5.0 g. of optical brightener of Formula I, 350-650 g.
- White pigment and, calculated on the amount of white
- white unpigment used 8-30% by weight of binder, (ll-0.6%v sized and, apticularly, sized paper needs optical brightenby Weight of metal binding agents and 0.0l0.03% by ing. This whitening can be performed by treatment of weight of wetting agents.
- the pulp with substantive optical brighteners; advarr- Examples of white pigments are aluminum-magnesitageously however, for the brightening of paper, the so- 40 um silicate (China Clay), CaSO .l0H O (Satinweiss),
- binders are dispersions of synthetic resins brighteners used for the surface coating process do not such as those based on butadiene-styrene, acrylic or methalways meet the increased whitening requirements beacrylic polymers or copolymers, together with degraded cause, generally, they are not sufiiciently active and, in starch, or dispersions of synthetic resins with casein, or high dosages, give the paper an undesirable greenish such dispersions together with degraded starch and tinge. casein.
- metal binding agents are water soluble bene-2,2'-disulph0nic acids of general Formula I, particu- 5 0 polyphosphates or polymetaphosphates, and examples of larly in the form of their soluble salts, are well suited for wetting agents are unsulphated or sulphated higher althe optical brightening of paper including cardboard, in kanol-polyglycol ethers such as those mentioned in the particular in the surface coating process. previous paragraph.
- Ar represents the unsubstituted phenyl
- prefradical or one containing non-colouring substituents e.g. an alkaline coating liquor is used for pigment
- non-colouring substituents are the sulphonic coating.
- the alkaline reaction is advantageously adacid or carboxylic acid group, halogens such as fluorine, ju-sted with ammonium hydroxide or with sodium or chlorine or bromine, low alkyl or alkoxy groups which 5 potassium hydroxides, carbonates, borates, perborates or contain, e.g. 1 to 5 carbon atoms.
- Ar is the mixtures thereof.
- Paper is advantageously coated with these liquors ac- In particular the alkali, alkaline earth or ammonium cording to (A) and (B) in a painting apparatus used for salts, e.g. those derived from ammonia or an alkanolthis purpose.
- salts e.g. those derived from ammonia or an alkanolthis purpose.
- the disodium salt is addition to an improved surface, have a more white and preferred. pleasant appearance.
- EXAMPLE 1 Bn'ghtening in the starch-size process
- the 2 g. of optical brighter of the formula as disodium salt are dissolved in 40 ml. of 90 hot, dis tilled water.
- a degraded starch e.g. Noredux l, Blattmann Co., Wiidenswil, ZH, Switzerland
- 80 g. of a degraded starch e.g. Noredux l, Blattmann Co., Wiidenswil, ZH, Switzerland
- 1000 ml. of 90 hot water are made into a colloid suspension over a period of minutes.
- the brightener solution is then incorporated into the starch solution.
- the solution obtained containing starch and brightener has a pH of 5.5 to 6.0.
- the surface of a sized paper for printing is coated with this liquor in a sizing press and the coated paper is dried at about 50120 in the drier section of the paper machine.
- sized paper instead of sized paper, sized cardboard can be used with the same result.
- the surface of sized paper or cardboard is coated with this liquor in the sizing press or another device.
- a paper coated extraordinarily white is obtained.
- EXAMPLE 3 Brightening of paper pulp 50 g. of an aqueous suspension of bleached sulphite cellulose containing 5 g. of absolutely dry cellulose are mixed with ml. of Water and the mixture is stirred well at room temperature. 0.71 ml. of a sizing solution 1:10 is added and the whole is again well mixed. 5 mg. of the optical brightener described in paragraph 1 of Example 1, dissolved in 10 ml. of water, are then mixed in, the mixture is again stirred Well whereupon the brightener completely draws onto the cellulose fibres. 1.5 ml. of aluminum sulphate solution 1:10 are then added to the pulp which is subsequently diluted with Water to 1000 ml.
- the diluted pulp is made into sheets, pressed and dried. In this way a clear, white sheet is obtained.
- An aqueous coating liquor for the optical brightening of the surface of paper comprising, per liter,
- Weight of Said Pigment (c) 830% by weight of a binder based upon the 3. coating liquor as claimed in claim 2 wherein weight f said Pigment; said binder IS a dispersion of a synthetic resm selected (d) 02 to 06% of a metal binding agent based upon from the group of butadiene-styrene, acrylic or methacrylic polymers and copolymers, and mixtures thereof welght of said plgmentiand (e) 0.01 to 0.3% of wetting agents based upon the with casein.
- a synthetic resm selected (d) 02 to 06% of a metal binding agent based upon from the group of butadiene-styrene, acrylic or methacrylic polymers and copolymers, and mixtures thereof welght of said plgmentiand (e) 0.01 to 0.3% of wetting agents based upon the with casein.
- a method for brightening the surface of paper com- Welght of sald p f prising coating the surface of the paper with an amount
- a method as clalmed 111 (21211111 6 wherein the comto effectively optically brighten said surface of said paper Pound is disodium with an aqueous coating liquor comprising, per liter, azine-2-y1)-amin0]-stilbene-2,2'-disulfonate.
Landscapes
- Paper (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1709765A CH455487A (de) | 1965-12-10 | 1965-12-10 | Verwendung von Bis-s-triazinylamino-stilben-2,2'-disulfonsäuren zum optischen Aufhellen von Papier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3475190A true US3475190A (en) | 1969-10-28 |
Family
ID=4422721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US598640A Expired - Lifetime US3475190A (en) | 1965-12-10 | 1966-12-02 | Optical brightening of paper |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3475190A (en, 2012) |
| AT (1) | AT268867B (en, 2012) |
| BE (1) | BE690943A (en, 2012) |
| CH (1) | CH455487A (en, 2012) |
| DE (1) | DE1696203A1 (en, 2012) |
| ES (1) | ES334353A1 (en, 2012) |
| FR (1) | FR1504243A (en, 2012) |
| GB (1) | GB1109537A (en, 2012) |
| NL (2) | NL6617360A (en, 2012) |
| SE (1) | SE319972B (en, 2012) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3892675A (en) * | 1973-01-23 | 1975-07-01 | Ici Ltd | Coating compositions |
| US4008172A (en) * | 1973-11-29 | 1977-02-15 | Ciba-Geigy Corporation | Agent for brightening and removing greyness from textiles |
| USRE30227E (en) * | 1973-11-29 | 1980-03-11 | Ciba-Geigy Corporation | Agent for brightening and removing greyness from textiles |
| US6030443A (en) * | 1999-04-29 | 2000-02-29 | Hercules Incorporated | Paper coating composition with improved optical brightener carriers |
| US20030192137A1 (en) * | 2000-07-20 | 2003-10-16 | Fabienne Cuesta | Method for the fluorescent whitening of cotton |
| US20050056391A1 (en) * | 2003-09-17 | 2005-03-17 | Huang Yan C. | Papers having borate-based complexing and method of making same |
| US9962984B2 (en) | 2014-12-24 | 2018-05-08 | Hewlett-Packard Development Company, L.P. | Coated print medium |
| US9981497B2 (en) | 2014-12-24 | 2018-05-29 | Hewlett-Packard Development Company, L.P. | Coated print medium |
| US10166806B2 (en) | 2014-12-24 | 2019-01-01 | Hewlett-Packard Development Company, L.P. | Coated print medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3502038A1 (de) * | 1985-01-23 | 1986-07-24 | Sandoz-Patent-GmbH, 7850 Lörrach | Waessrige aufhellerpraeparate und deren verwendung im papierstrich |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2213643A (en) * | 1938-10-11 | 1940-09-03 | Vanderbilt Co R T | Coated fibrous sheet materials |
| US2376743A (en) * | 1939-12-19 | 1945-05-22 | Wendt Bruno | Carbohydrate solutions |
| CA529326A (en) * | 1956-08-21 | A. H. Kessels Franciscus | Developer for diazotype materials | |
| GB862851A (en) * | 1958-05-31 | 1961-03-15 | Prod Chim Et De Synthese Soc D | Bis-triazinylaminostilbene disulphonic acid derivatives |
-
0
- NL NL136180D patent/NL136180C/xx active
-
1965
- 1965-12-10 CH CH1709765A patent/CH455487A/de unknown
-
1966
- 1966-12-02 US US598640A patent/US3475190A/en not_active Expired - Lifetime
- 1966-12-09 BE BE690943D patent/BE690943A/xx unknown
- 1966-12-09 GB GB55269/66A patent/GB1109537A/en not_active Expired
- 1966-12-09 AT AT1134966A patent/AT268867B/de active
- 1966-12-09 NL NL6617360A patent/NL6617360A/xx unknown
- 1966-12-09 ES ES334353A patent/ES334353A1/es not_active Expired
- 1966-12-09 SE SE16909/66A patent/SE319972B/xx unknown
- 1966-12-09 FR FR86812A patent/FR1504243A/fr not_active Expired
- 1966-12-09 DE DE19661696203 patent/DE1696203A1/de active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA529326A (en) * | 1956-08-21 | A. H. Kessels Franciscus | Developer for diazotype materials | |
| US2213643A (en) * | 1938-10-11 | 1940-09-03 | Vanderbilt Co R T | Coated fibrous sheet materials |
| US2376743A (en) * | 1939-12-19 | 1945-05-22 | Wendt Bruno | Carbohydrate solutions |
| GB862851A (en) * | 1958-05-31 | 1961-03-15 | Prod Chim Et De Synthese Soc D | Bis-triazinylaminostilbene disulphonic acid derivatives |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3892675A (en) * | 1973-01-23 | 1975-07-01 | Ici Ltd | Coating compositions |
| US4008172A (en) * | 1973-11-29 | 1977-02-15 | Ciba-Geigy Corporation | Agent for brightening and removing greyness from textiles |
| USRE30227E (en) * | 1973-11-29 | 1980-03-11 | Ciba-Geigy Corporation | Agent for brightening and removing greyness from textiles |
| US6030443A (en) * | 1999-04-29 | 2000-02-29 | Hercules Incorporated | Paper coating composition with improved optical brightener carriers |
| US6929667B2 (en) * | 2000-07-20 | 2005-08-16 | Ciba Specialty Chemicals Corporation | Method for the fluorescent whitening of cotton |
| US20030192137A1 (en) * | 2000-07-20 | 2003-10-16 | Fabienne Cuesta | Method for the fluorescent whitening of cotton |
| US20050056391A1 (en) * | 2003-09-17 | 2005-03-17 | Huang Yan C. | Papers having borate-based complexing and method of making same |
| US7608166B2 (en) * | 2003-09-17 | 2009-10-27 | International Paper Company | Papers having borate-based complexing and method of making same |
| US20100043991A1 (en) * | 2003-09-17 | 2010-02-25 | International Paper Company | Papers Having Borate-Based Complexing And Method Of Making Same |
| US7815770B2 (en) | 2003-09-17 | 2010-10-19 | International Paper Company | Papers having borate-based complexing and method of making same |
| US9962984B2 (en) | 2014-12-24 | 2018-05-08 | Hewlett-Packard Development Company, L.P. | Coated print medium |
| US9981497B2 (en) | 2014-12-24 | 2018-05-29 | Hewlett-Packard Development Company, L.P. | Coated print medium |
| US10166806B2 (en) | 2014-12-24 | 2019-01-01 | Hewlett-Packard Development Company, L.P. | Coated print medium |
| US10414189B2 (en) | 2014-12-24 | 2019-09-17 | Hewlett-Packard Development Company, L.P. | Coated print medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CH1709765A4 (en, 2012) | 1968-07-15 |
| BE690943A (en, 2012) | 1967-06-09 |
| NL6617360A (en, 2012) | 1967-06-12 |
| DE1696203A1 (de) | 1971-10-28 |
| NL136180C (en, 2012) | |
| CH455487A (de) | 1968-07-15 |
| GB1109537A (en) | 1968-04-10 |
| ES334353A1 (es) | 1968-02-01 |
| AT268867B (de) | 1969-02-25 |
| SE319972B (en, 2012) | 1970-01-26 |
| FR1504243A (fr) | 1967-12-01 |
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