GB1369202A - Optical brightening of paper - Google Patents

Optical brightening of paper

Info

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
Application number
GB3284270A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
Ciba Geigy AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Priority to GB3284270A priority Critical patent/GB1369202A/en
Publication of GB1369202A publication Critical patent/GB1369202A/en
Expired legal-status Critical Current

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.
GB3284270A 1971-08-10 1971-08-10 Optical brightening of paper Expired GB1369202A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (11)

* Cited by examiner, † Cited by third party
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