DE2039034A1 - Process for uniform coloring and / or optical lightening of paper - Google Patents

Description

Dr. W. ScWk, DJpI ₁ -In ₀ . R We * Diploma tog. G. Dannenberg Or. V. SchmMd-Kowarzfc Dr. P. Weinhoid, Dr. D. GihW

Sandoz AG Basel / Switzerland

Case 150-3095

Process for uniform coloring and / or optical lightening of paper

Leg coloring paper pulp in the mass in light tones it happens often, especially when the material circulation is not very good What is intense is that the water-soluble dyes on the too quickly Pull up pulp, i.e. before it evenly in the paper pulp are distributed. This creates mottles, i.e. that in the finished More strongly colored fibers are visible on the paper.

If basic dyes are used, mottling can be prevented by adding an anionic dispersant such as Sodium dinaphthyl methane disulfonate is added, which precipitates the basic dye and disperses it at the same time. So he cannot ■ pull it up and the result is a pigment coloration. It is also known that the basic dye is already in solution with a Agents such as sodium dinaphthyl methane disulfonate precipitate and the resulting pigment dispersion is used to color the paper stock.

Another well-known method is in case of weighted papers be prepared to add the dye solution to part of the filler slurry used. This will

109809/1801

ORIGINAL INSPECTED

the dye is absorbed by the filler and therefore no longer or only slowly pulls onto the pulp.

Most basic dyes, however, are insufficient because of their Affinity to bleached pulps and their poor lightfastness mainly on unbleached pulps or strong wood pulp containing paper pulp is used.

For this reason, generally anionic, substantive dyes are used for dyeing high-quality papers made from pure bleached cellulose »preferably those with a good affinity for cellulose in order to ensure colorless wastewater.

When working with anionic nouns, dyes are used The following measures are known to prevent the appearance of mottling:

a) Very strong dilution and cooling of the dye solution and * would give to the paper stock at a point where the fabric circulation is very intense. However, this is not technically feasible in many companies.

b) adding filler (kaolin or talc) to the dye solution, so that the dye is bound to it and cannot be absorbed by the fiber. The disadvantage of this method is that it can only be used in the case of weighted papers and, furthermore, that this results in the tendency towards colored two-sidedness in in many cases is very pronounced.

109800/1801 ORiGIMAL INSPECTED

c) An alternative is the use of very weakly to non-nouns anionic dyes, for example acid dyes _/ which are not yours. However, these are less suitable for deeper nuances, since a relatively large proportion of the dye does not absorb due to the lack of substantivity, is lost with the white water and stains the wastewater and the absorbed dyes when drying the paper web to the mini. - tend to green. As a result, the dye store would have to be practically doubled. In addition, the colorations produced are not wet-fast.

It has now been found * that by adding water-soluble, surface-active compounds, which at least one lipophilic Remainder, contain at least one basic nitrogen atom and at least one Polvgylkolätherrast, uniform colors and / or optical brightening of paper pulp in light tones Most unfavorable material circulation conditions with nouns anionic dyes can be achieved, with in the finished paper no mottling is noticeable ..

Dl · here (gemannt the following aids) as water designated Verbim4ungen have of mind "stems 31 at 20 ⁰ C" in · water solubility.

The term paper is used here to refer to both the paper itself and the understood the box and the cardboard. The paper came from cotton waste, e.g. from rags »or from wood (e.g. softwood: spruce

109809/1801

BATH

or pine wood or hardwood: beech or birch wood) according to known digestion processes (e.g. alkaline or acidic processes such as sulphate or sulphite processes). After dyeing , it can be glued or left unglued.

Suitable lipophilic radicals are, for example, aliphatic saturated or unsaturated radicals which may contain heteroatoms and have, for example, 10 to 24 carbon atoms, such as n-decyl, n-dodecyl, n-tetradecyl, n-hexadecyl (cetyl), n-octadecyl (stearyl), n- Octadecenyl (oleyl), n-eicosyl (arachinyl), n-docosyl (behenyl), tert-dodecyl, oxo- tridecyl (ie produced by the oxo process), dxo-hexadecyl, 2-n-dodecyloxy-ethyl , 3-n-dodecyloxypropyl, 2- (2 · -n-dodecyloxy- ethoxy) -ethyl, 2-cetyloxy-ethyl, 3-01eyloxy-2-hydroxypropyl, 3-stearyloxypropyl, 2-stearo) laminoethyl, and also alkylaryl radicals with, for example 12 to 24 carbon atoms such as tert-octylphenyl, iso-octylphenyl, nonylphenyl, dodecylphenyl, diocty! Phenyl or ϋίηοΨ! Phenyl are possible .

The polyglycol ether residue can consist exclusively of -C ^ 10 groups

or from -CHO- and -C-ILO- and / or -C, H_O- and / or 2 4 3 ο 4 8

-CH.-O- groups, the number of oxyalkyl groups can vary between 7 and 120 depending on the size of the lipophilic radical.

Particularly suitable aids are, for example, those described in Swiss patents 353 013 and 409 991 and in French patent 1 261845 and, for example,

109809/1801

obtained by adding 15-50 moles, preferably 15-40 moles, Ethylene oxide on 1 mole of a compound of the formula

NH-CH

m "2m

n-1

(I)

attaches

wherein A is an optionally substituted aliphatic hydrocarbon radical containing 16-22 carbon atoms, and the chain of which can be interrupted by heteroatoms, η 1 to 6, preferably 2 to 3 and m is 2 to 6, preferably 2 to 3, and the compounds thus obtained are optionally completely or partially quaternized with quaternizing agents, e.g. dimethyl sulfate, diethyl sulfate, chloroacetic acid amide, benzyl chloride.

The radical C H. can be straight-chain or branched, e.g.

-CH ₂ -CH ₂ -, -CH ₂ -CH ₂ -CH ₂ -, -CH-CH ₂ -, -CH ₂ -CH-, -CH ₂ -CH ₂ -CH ₂ -CH ^

CH ₃ CH ₃

or - (CH ₂ ^ and the rest - ^NH C ~ ^c _m ^H 2i _a] ^ ir ^"NH 2 ^Ζ · · ^{Β derived from} ammonia or from one of the following polyamines from: 1,2-Aethylendiarain, 1,2- Propylenediamine, diethylene or di-propylenetriamine, triethylene or tripropylene tetramine, tetraethylene pentamine, pentaethylene hexamine, trimethylene dianine, tetränethylene diamine, pentamethylene diamine, hexamethylene diamine.

10Θ809 / 1801

The auxiliaries are preferably used with the dye or Brighteners added to the paper breed in an amount corresponding to that of the dye is the same or is usually not

significantly exceeds. The auxiliaries are expediently used in amounts of from 0.003 to 4 %, preferably from 0.03 to 1.5 %, based on the substrate. The amount to be used of • aid depends on the amount of the dye, or optical brightener, and is advantageously from 1 to 10 times, preferably the 2 - fold to 6 ~, the dye W or Aufhellerrnenge. It is particularly advantageous to proceed in such a way that the auxiliary to be used according to the invention is dissolved in the dye or healer solution and the solution thus obtained is added to the paper pulp.

Examples of dyes and optical brighteners are used expedient ■ ässig those that under the conditions for the production of paper (in aqueous medium at temperatures of for example 0 ° to 3O-35 ° C, in particular at 10-20 ⁰ C, with weakly acidic to very weakly alkaline reaction, advantageously in the pK-3 range from H to 7 and preferably from 4.5 to 5 * 5 »have a high affinity for the paper in order to obtain a good dyeing yield and to minimize losses in the white water Such dyes, which tend to become mottled, can

belong to different classes of dyes, e.g. 3. the azo range, preferably of the dis- and polyazo series, the anthraquinones Phthalocyanine, dioxazine series, etc. Examples of mottling Tending dyes are:. * '"

BATH ORIGINAL

109809/1801

(QH, k ' -3Is-U ¹¹ - (4 *''-sulfo-phenylazoJ-phenylazoCazoxy) j-stilbene2,2 * -disulfonic acid as sodium salt: orange

CH,

NaO, S.

HO ₃ S

OH

NH-CO-HN

NH-CO-HN

NH-CO-IW

yellowish red

NH-CO-CH,

Red

SO ₅ Na ' ' ^S0 5 ^Ha

Red

CO

bluish red

109809/1801

WSPECTED

KH ₂ pH

SO-3N

greenish blue

1 -hydroxy -ί

-S ¹ '' -azo) -naphthyl-l "-azoj -

S ,? ¹ ^ ¹¹¹ ^ · " tetrasulfone-

acid as the sodium salt

blue

The copper complex of 4- (4 "-hydroxy-3"-carboxyphenylazoM'-p? ^11!, 4 ' ^f ' -dihydroxy 5 '"- (2""- hydroxyphenyl azo) -phenylazo -1,1 * -diphenyl -5 "" - sulfonic acid as sodium sal ζ: reddish brown

The tricopper complex compound of 3,3'-dihydroxy-4- (1 "-hydroxynaphthyl-2 ^fl -azo) -4 ^l -'l ^l ", 5 " ¹ -dihydroxy-6 '" - (l "" - hydroxynaphthyl-2 ^IIIf -azo) -naphthy 1 -2 '''-azo;-1,1' -diphenyl-3 ", 6", 8 ", 3 ''',V'-pentasulfonic acid as the sodium salt: bluish gray

4- (2 ^M _J 4 ^ll -Diaminophenylazo) -4 ^l - (l ¹ "^ amino-7 ¹ " -phenylazo-8 ^f ^ -hydroxynaphthyl ^ ¹ "-azo) -1,1'-diphenyl-3"', 6 ¹ ' ^f disulfonic acid as sodium salt: black

\ n copper phthalocyanine-iSO-.lia) _ _o , in which the S0, l! a groups are in the 3 positions: turquoise blue.

109809/1801

ORIGWAL INSPECTED

12. The dye of the formula

O NH,

NH-OC-CH =

13. The dye of formula

green

0 NH

4 *

NH-C C-NH! HNN SO ₃ Na ^

N-N

NH

yellowish green

14. The dye of the formula

SO ₃ Na

NaO

SO ₃ Na

greenish blue

109809/1801

15. The dye of the formula

--(SO,

blue

16. The dye of the formula

- + (SO ₃ Na) ₃

reddish blue

The dyes are advantageously used in amounts of from 0.001 to 1.5%, preferably from 0.01 to 0.5%, based on the paper.

Whitening agents include those of the stilbene triazinyl series, especially those of the formula

, M

(II)

109809/1801

BATH ORIGINAL

203903A

into consideration

where He is a monovalent cation (Na ⁺ , K, HlIu ⁺ ,

etc.),

X ₁ and X- each independently represent an alkoxy radical, an alkylamino, hydroxyalkyla.nino, N-alkyl-N-hydroxyalkylamino, dihydroxyalkylamino, N-cyanoalkyl-N-hydroxyalkylamino radical or the morpholine or piperidine radical

and Y, and Y ₂ each independently represent an aryloxy radical of the benzene series, an amino group, an alkylamino group or an arylamino group of the benzene, naphthalene or diphenyl series, where alkyl and alkoxy contain, for example, 1 to 6 carbon atoms and the aryl radicals contain substituents such as Alley I. -, alkoxy, acylamino, sulfonic acid, carboxylic acid groups or halogen atoms can carry.

Representatives of this group can be found in the table below listed products.

109809/1601 BADOFIlGiNAL

copy

- 12 table

is

«T el SS SS

«I rf SS 25

rf rf

25th

rf 25

rf SS

sf c cv-σ

O O Ό Ό

O TJ ο ο ο υ TJ XJ TJ I

ο ο

TJ TJ

O TJ

O Ό

KN

SOOOO Ol TJ TJ Τί Ό SC O

ο ο ο υ TJ Ό TJ I

ο ο

Ό Ό

• σ

O Q W & «O X M

Hi

109809/1

a CD O «J US • X X «) I. || α ο «Ι - X • Ι • I. Λ ι I. O M. egg «5 «5 • X Y «N 55 ' • J S3 55 Ό 53 pp O55 Χ S3 55. • Ü SS
A. O SS JC SS O ' 53 S3 S3 I. I. - = ίθ O ■ = ίϋ O • 55 25th J ^ ■ I. J. JL O X is Κ \ X ^ f J-- KN Ä ir -si- OJ JC J ^ 53 O • X CVtC X Ä -CVJT X ill SS Oil Ji I. O ϋ CU CU
N, S ϋ ϋ Q ^ JP CU CU I. ι O
ι I 'I I. 9 X O Oil 5? X Oi CU 55 O ^ ferf ^ I 55 53 "** S ^ ϋ 55 53 55 υ ■ Ό "^ I. I 53 ι 55 JL ι χ T 1 JL I. CQ I. CU I.
rH -O ⁰ V co SC O Q ϋ ο- ι I ο O ϋ I ■ • d * j & χ I. ο ' «Ι d . S3 SS te co 53 Oil O O ι SS SS K \ ¹ Jl ΚΛ I. ι B. • ö Ό I. I. X X ι ο I " SS H ^ O - I. ⁵ T JL JL 53 -sr
X I. Oil X ^ I CU I. Oil 53 OJ S3 O OJ O Jw I. 1 ■ Ö υ ι T X I. a? ■ CQ O ι 03 co O X ι Il O Vn ϋ χ f B K \ ^ r S3
I. ι 25th X a 55 - CU I. Ss SS Oil CU
O X ι O y ϋ O κ \ τ » OJ sii I. O > ο Q I. OJ • ο X y \ X ι O υ te KN OJ χ χ ι O ^ z X X
O X cu _r cu Oil - ■ Ö Oil
Ü > » / O X 55 X * O I. Q D. I. • si " X ι Oi ** cu ο O Ü κ * Oil * X O 55 υ SU I. I. O O 5 "^ ΚΛ χ a: O 5s X X χ CU CU C / K> OJ O S: X O O 55 I. O Tbsp. Ν

109000/1001

it 2 rf X - «S "1 * \ ! O I. X 2 O * 2 2 O tr O IA -S- I. Λ X 125 af
Oil
Ü 2 O V IA f
* OJ Ol O
Ό O
•O X X U O I. O CVJ Oil
O \ / ^ I. O r *
> * i I. O
TJ tr * r \ I. O
YES ^ 03 NH- yyyy • V LA I. ** CVI "Ol JC OJ I. I. O 2Y X O IA 1 Oi X Oil υ O O IA Ό X Oil O a

109Ö09 / 1801

ORIGINAL INSPECTED

Other possible brighteners are, for example, the following

(III),

KH-CXJ-R ₁

where both rows are the same and z.3. Phenyl, ft-methoxyphenyl

or are 2,4-dimethoxyphenyl;

NaO ₃ S-CH ₂ -HlI

(IV);

I. * 2 R ₃ ^R 4 «5 AK
> -SO ₃ Na H H H ; al H -SO ₃ Na -SO ₃ Ka H AT Cl -SO ₃ Na H -SO ₃ Na AK H -SO ₃ Na H Hv

and

(VI)

1098 09/1801

BAD OBIQINAL

^- J. O ··

Amounts of from 0.001 to 1 * 5 £ * preferably 0.01 to 0.55t »based on the paper, used.

The addition of the auxiliaries to be used according to the invention sun paper pulp before dyeing or /. optical brightening or preferably in the dye or brightener solution itself entertained «that the coloring or optical brightening does not matter, while without the mentioned aids a distinct mottling occurs. The colored or optically lightened paper possesses

same v.

^ good light, rubbing and hate fastness e.g. water fastness, like the paper colored or optically brightened without the addition of auxiliary agents.

Thanks to the invention, highly substantive anionic direct dyes can now also be used for dyeing paper pulps in light shades as well ZiOi subsequent nuances can be used in the machine chest. Up to now, these dyes could only be used for medium-sized because of the risk of mottling until full tones are used and subsequent nuances are always associated with a risk of blurring. One needs now ■ ot very two assortments, one highly substantive for rich tones. (because of the sewage) and a weak substantive for light tones.

10 9 8 0 9 ' ¹ - 0 I.

BATH ORIGINAL

In the following examples, parts mean parts by weight and the percentages percentages by weight. The temperatures are given in degrees Celsius.

example 1

1000 parts are bleached in a slow-moving Dutch machine Sulphite cellulose (made from spruce or pine) is added to 20,000 parts of water at room temperature A solution of 0.125 parts of the dye φ in 12.5 parts of water was added. After a period of 10 minutes it is necessary to to distribute the dye homogeneously in the paper pulp to some extent, 20 parts of resin glue are added and, after a further 10 minutes, parts of aluminum sulfate.

The paper made from this mass shows a strong mottling, i.e. that individual fibers in the paper are much more heavily colored than the others.

In order to prevent this mottling, the Dye solution containing 0.125 parts of the dye (T) in 12.5 parts Contains water, mixed with 0.75 parts of the product, which is obtained by adding 40 mol of ethylene oxide and finally 1 mol of dimethyl sulfate to 1 mol of 3- (octadecylamino) propylamine - auxiliary 1 was obtained. This solution is then added to the paper pulp in the Hollander and after 10 minutes it is again mixed with 20 parts of resin milk and after a further 10 minutes with 30 parts of aluminum sulfate

109809/1801

leiat. Fine paper made from this second batch, no more mottling can be observed at all and the coloring of this paper is extraordinarily calm and irrelevant, even if the subsequent gluing does not take place. When using a mixture of 301 birch cellulose and 701 spruce or pine cellulose, a calm and level coloration is also obtained.

If you replace the dye Q *) with one of the dyes (2) to (lö) replaced, one obtains more or less strongly mottled dyeings without the auxiliary to be used according to the invention, while level dyeings are produced in the presence of the above auxiliary will.

You get equally good results with the following auxiliary chords: Addition practice of 30 moles of ethylene oxide to 1 mole of 3-tallow alkylaminopropylamine quaternized with 2 moles of dimethyl sulfate »auxiliary 2.

As auxiliary 1 but quaternized with 2 moles of dimethyl sulfate » Tools 3.

Like aid 2 but quaternized with only 1 mol of dimethyl sulfate » Tools 4.

Addition product of 15 mol of ethylene oxide with 1 mol of 3-tallow alkyl aninopropylamine quaternized with 1 mol of dimethyl sulfate * auxiliary

109809/1801

Tallow alkyl is an alkyl mixture of about 301 hexadecyl, To understand 251 octadecyl and 451 octadecenyl.

Example 2

In the manner indicated in Example 1, 1000 parts of bleached sulfite cellulose in 20,000 parts by volume are mixed with a solution of 0.125 part of the dye 0 and 0.5 part of the auxiliary 6 described below in 15 parts of water / water. The finishing of the paper sheet is carried out in the same way as in Example 1. A light red level coloring is obtained.

The auxiliary 6 is the adduct of 90 mol of ethylene oxide to 1 KoI ^ -stearylamino-propylamine.

The following tools can also be used to obtain level paper dyeings:

Addition product of 18 mol of ethylene oxide to 1 mol of stearyl tripropylene tetrarrtln = Aid 7

Addition product of 26 moles of ethylene oxide and 1 mole of behenyl tripropylenetetramine = Auxiliary 8.

Addition product of 17 "oil of ethylene oxide with 1 mol of 3-tallowalkylaminopropyl alcohol = Auxiliary 9.

Anlacerun ££ product of ha :! Ol ethylene oxide on 1 mol 3-Tallowalkylaminopropylrxin «HilfKnit.tel 1 '?.

9 / }> 0 '

BATH

Adduct of 25 mol of ethylene oxide with 1 mol of tallow alkyldi athylenetriamine - auxiliary 11.

Addition product of 25 moles of ethylene oxide with 1 mole of 2-hydroxy-3- olyloxypropyl-diethylenetriamine quaternized with 1 mole of dimethyl sulfate - auxiliary 12.

Adduct of 20 moles of ethylene oxide with 1 mole of 2- (2'n-dodecyl- oxy-ethoxy) -ethyl-diethylenetriamine with 1 mole of dimethyl sulfate quater. ned * Aid 13.

Addition product of 20 moles of ethylene oxide with 1 mole of 2- (2'-tert- dodecylthio-ethoxy) -ethylethylenediamine quaternized with 1 mole of dimethyl sulfate - auxiliary 14.

Addition product of 40 moles of ethylene oxide with 1 mole of stearyl-1,2- propylenediaaine with 1 mole of benzyl chloride quaternicrt - auxiliary

Addition product of 50 moles of ethylene oxide with 1 mole of tallow alkyl dipropylenetriaein «with 1 mole of dimethyl sulfate quaternized - auxiliary 16.

Addition product of 70 moles of ethylene oxide with 1 mole of 3-alkylaminopropylaain, where alkyl consists of 10 % stearyl, 55% arachidyl and 3S \ behenyl - auxiliary agent 17.

109809/1801 bad original

Auxiliary 17 quaternized with 1 mol of dimethyl sulfate = auxiliary 18

Addition product of 50 moles of ethylene oxide with 1 mole of 2-oleylaminoethylamine quaternized with 1 mole of dimethyl sulfate * Auxiliary 19.

Addition product of 40 mol of ethylene oxide with 1 mol of 4-stearylaminobutylamine quaternized with 1 mol of dimethyl sulfate »auxiliary 20.

Adduct of 50 moles of ethylene oxide with 1 mole of falgalkyl-triethylenetetramine quaternized with 1 mole of dimethyl sulfate ^s auxiliary 21.

Adduct of 35 moles of ethylene oxide with 1 mole of 6-cetylaminohexylamine quaternized with 1 mole of dimethyl sulfate. Auxiliary 22.

Addition product of 45 moles of ethylene oxide with 1 mole of tallow alkyl polyethylene polyamine quaternized with 2 moles of dimethyl sulfate (polyethylene polyamine being a mixture of triethylene tetramine, tetraethylene pentamine and pentaethylene hexamine) * Aid 23.

Addition product of 30 moles of ethylene oxide with 1 mole of 5-stearylaminopentylamine quaternized with 1 mole of dimethyl sulfate. Auxiliary 24.

109809/1601

BATH ORIGINAL

Addition product of 110 moles of ethylene oxide with 1 mole of 3-alkylaminopropylamine, where alkyl of 10t stearyl, 551 arachidyl and 35 I Behenyl Consists - Resource 25.

Auxiliary 25 quaternized with 1 mol of dimethyl sulfate - auxiliary

Addition product of 35 moles of ethylene oxide with 1 mole of tallow alkyl diethylenetriamine quaternized with 1 mole of diethyl sulfate · auxiliary 27

As aid 27, but quaternized with 1 mol of 2-hydroxyethyl chloride - aid 28.

As auxiliary 27, but quaternized with 1 mol of chloroacetic acid amide

- Aids 29.

As aid 27, but quaternized with 1 mol of benzyl bromide - aid 30.

As auxiliary 27, but quaternized with 1 mol of n-butyl bromide »Aids 31.

As auxiliary 27, but quaternized with 1 mol of ethyl bromide

- Aids 32.

109809/1801

ORIGINAL INSPECTED

Adduct of 30 mol of ethylene oxide with 1 mol of 2-Cctyloxyäthyl-diethylenetriamine quaternized with 1 mol of dimethyl sulfate - Aids 33.

Addition product of 25 moles of ethylene oxide with 1 mole of 3-stearyloxypro pyl-diethylenetriamine quaternized with 1 mol of dimethyl sulfate «Aids 34.

Adduct of 35 moles of ethylene oxide and 1 mole of stearoyl-triethylenetetramine quaternized with 1 mole of dimethyl sulfate ■ = tools 35.

Example 3

1000 parts are bleached in a slow-moving Dutch machine Sulphite cellulose entered into 20,000 parts of haters. To this A solution of 0.25 part of the brightener I and 0.5 part of the auxiliary 3 in 15 parts of water is added to the mass. The completion of the paper sheet takes place in the manner indicated in Example 1 Way. A white, uniformly lightened sheet of paper is obtained.

With the other tools 1, 2, 4 5, 12 to 16, 18 to 24 and 26 to 35 you also get good results with the same concentration, while in the case of auxiliaries 6 to 11, 17 and 25 the amounts are up 1.0-2 parts are to be increased.

109809/1801 _B AD ORiQiNAL

Example 4

1000 parts of bleached sulphite cellulose are added to 20,000 parts of water in a slow-moving dutchman. To this crowd a solution of 0.25 parts of the dye (D and 0.75 parts de of the auxiliary 36 described below in 15 parts of water was added. The completion of the paper sheet takes place in the example 1, a uniformly light red color is obtained Sheet of paper.

The auxiliary 36 is the addition product of 10 moles of ethylene oxide to 1 mole of oleylamine.

If you increase the amount of the aid to 1 part or more, you get you get a level but weaker color.

Example 5

_k The procedure given in Example 1 is followed, but 0.25 part of the dye @ and 0.75 part of the auxiliary 4 are used. A light green level dyeing is obtained, while the coloring is markedly weaker without the addition of the auxiliary.

Example 6

Dyeing of bleached sulphite cellulose in the direction indicated in Example 1 but using 0.25 part of the dye © and 0.75 parts of the implement 37. It is described below

109809/1801 originally inspected

receives a level, light blue coloration, while without the addition of the auxiliary agent 37 the color is very mottled.

The auxiliary 37 is the adduct of about 7-8 moles of ethylene oxide with 1 mole of tallow alkylamine.

109809/1601

Claims (3)

Claims QJ) Process for uniform dyeing and / or optical lightening of paper in the pulp with anionic dyes or brighteners, characterized in that in the presence of water-soluble surface-active compounds it is colored or lightened which contain at least one lipophilic residue, at least one alkaline Contain nitrogen atom and at least one polyglycol ether residue. II. Paper colored or lightened according to the method characterized in claim I. Sub-talks 1. The method according to claim I, characterized in that one water-soluble surface-active compounds are used, which by the addition of 15-50 moles of ethylene oxide to 1 mole of a * Compound of formula r 1 -NH_ (I), wherein A is an optionally substituted aliphatic Hydrocarbon radical which contains 16-22 carbon atoms and whose chain can be interrupted by heteroatoms, η 1 to 6 109809 / 1SOt £ 039034 and m are 2 to 6, getting produced. 2. The method according to claim I, characterized in that water-soluble surface-active compounds are used, which are produced by quaternizing the compounds characterized in dependent claim 1. 3. The method according to claim I and the dependent claims 1 and 2, characterized in that the surface-active compounds are added to the paper pulps as aqueous solutions in which the dyes and the optical brighteners are also dissolved. 109809/1801