GB1369202A - Optical brightening of paper - Google Patents
Optical brightening of paperInfo
- Publication number
- GB1369202A GB1369202A GB3284270A GB3284270A GB1369202A GB 1369202 A GB1369202 A GB 1369202A GB 3284270 A GB3284270 A GB 3284270A GB 3284270 A GB3284270 A GB 3284270A GB 1369202 A GB1369202 A GB 1369202A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- brightener
- salt
- solution
- paper
- 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
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
Landscapes
- Paper (AREA)
Abstract
1369202 Optical brightening of paper CIBAGEIGY AG 10 Aug 1971 [7 July 1970 (2)] 32842/70 and 32844/70 Heading DIP A process for brightening paper comprises contacting paper pulp with a solution comprising an optical brightener for cellulose and an organic carboxylic acid (1-13C) or a water soluble salt thereof, or with separate solutions containing the brightener, and the acid or its salt, respectively. The proportion of the acid or salt to brightener may be from 3-300% by weight based on the brightener. Preferably the acid is an aliphatic or aromatic acid having from 1 to 3 carboxyl groups and 1 or 2 hydroxy substituents per molecule. Alternatively the acid may contain an amino or chlorosubstituent. citric and tartaric acids are preferred. In one embodiment, paper is treated simultaneously or in sequence with (a) a solution of optical brightener for cellulose (b) a solution or emulsion of rosin size and (c) a solution of alum and a mono-, di- or tricarboxylic acid (1-13C) having 1 or 2 hydroxy groups or a solution containing alum and a salt of the acid. The acids may be present as their potassium sodium, ammonium or ethanolamine salts. The brightener may have the formula I: wherein X and Y may each be a mono- or di-substituted amino group, and M is an alkali metal. Specified mono-substituted amino groups include alkylamino (1-4C), hydroxyalkylamino (1-4C), alkoxyalkylamino (2-8C), cyclohexyl -amino, anilino, or anilino ring substituted with one or more alkali metal sulphonate groups. Specified di-substituted amino groups include dialkylamino, or dihydroxyalkylamino each having 1-4C in each chain, (di-(alkoxyalkylamino) with 2-8C in each chain, N-alkyl- N-hydroxyalkylamino with 1-4C in each chain, N-alkyl-N arylamino having 1-4C in the alkyl chain, pyrrolidino, piperidino or morpholino. The solvent may be water, an aliphatic alcohol or ketone, or dimethyl formamide. Further additives used in the process include Glauber's salt, clay starch, titanium dioxide, and size, mineral acid, alum, sodium aluminate, alkali metal hydroxides, ammonia and ethanolamine are mentioned as substances which may be used for pH adjustment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3284270A GB1369202A (en) | 1971-08-10 | 1971-08-10 | Optical brightening of paper |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3284470 | 1971-08-10 | ||
GB3284270A GB1369202A (en) | 1971-08-10 | 1971-08-10 | Optical brightening of paper |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1369202A true GB1369202A (en) | 1974-10-02 |
Family
ID=26261587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3284270A Expired GB1369202A (en) | 1971-08-10 | 1971-08-10 | Optical brightening of paper |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1369202A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992001115A1 (en) * | 1990-07-03 | 1992-01-23 | W.R. Grace & Co.-Conn. | The enhancement of fluorescent whitening agents |
EP0919664A1 (en) * | 1997-11-29 | 1999-06-02 | Thibierge & Comar S.A. | Very white transparent or translucent paper, and process for making the same |
WO2004050994A1 (en) * | 2002-12-04 | 2004-06-17 | Holmen Aktiebolag | A method for increasing the stability of fluorescent whitening agent |
WO2009074548A3 (en) * | 2007-12-12 | 2009-10-01 | Clariant International Ltd | Storage stable solutions of optical brighteners |
CN106046854A (en) * | 2016-05-27 | 2016-10-26 | 浙江传化华洋化工有限公司 | Preparation method of mixed fluorescent whitening agent |
-
1971
- 1971-08-10 GB GB3284270A patent/GB1369202A/en not_active Expired
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992001115A1 (en) * | 1990-07-03 | 1992-01-23 | W.R. Grace & Co.-Conn. | The enhancement of fluorescent whitening agents |
US5266078A (en) * | 1990-07-03 | 1993-11-30 | W. R. Grace & Co.-Conn. | Enhancement of fluorescent whitening agents: water-soluble phosphonates and carboxylates for coating paper |
EP0919664A1 (en) * | 1997-11-29 | 1999-06-02 | Thibierge & Comar S.A. | Very white transparent or translucent paper, and process for making the same |
FR2771758A1 (en) * | 1997-11-29 | 1999-06-04 | Thibierge Et Comar | TRANSPARENT OR TRANSLUCENT EXTRA WHITE PAPER AND ITS MANUFACTURING PROCESS |
WO2004050994A1 (en) * | 2002-12-04 | 2004-06-17 | Holmen Aktiebolag | A method for increasing the stability of fluorescent whitening agent |
WO2009074548A3 (en) * | 2007-12-12 | 2009-10-01 | Clariant International Ltd | Storage stable solutions of optical brighteners |
CN101932567B (en) * | 2007-12-12 | 2013-01-23 | 科莱恩金融(Bvi)有限公司 | Storage stable solutions of fluorescent whitening agent |
RU2505535C2 (en) * | 2007-12-12 | 2014-01-27 | Клариант Финанс (Бви) Лимитед | Solutions of optic bleaches, stable in storage |
US8894815B2 (en) | 2007-12-12 | 2014-11-25 | Clariant Finance (Bvi) Limited | Storage stable solutions of optical brighteners |
CN106046854A (en) * | 2016-05-27 | 2016-10-26 | 浙江传化华洋化工有限公司 | Preparation method of mixed fluorescent whitening agent |
CN106046854B (en) * | 2016-05-27 | 2017-10-20 | 浙江传化华洋化工有限公司 | A kind of preparation method for mixing fluorescent whitening agent |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |