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
  • D21H19/00—Coated paper; Coating material
  • D21H19/36—Coatings with pigments
  • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
  • D21H19/46—Non-macromolecular organic compounds
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
  • D06L4/60—Optical bleaching or brightening
  • D06L4/664—Preparations of optical brighteners; Optical brighteners in aerosol form; Physical treatment of optical brighteners

Definitions

• the present invention relates to new solid and liquid dispersion brightener preparations, their preparation and their use for brightening coating slips, e.g. for the coating of paper, cardboard, wood, foils, textiles, non-woven materials and building materials.
• the predominantly synthetic latex binders based on e.g. Containing copolymers of styrene-butadiene-acrylic acid esters or styrene-butyl acrylate, it has therefore been proposed to use dispersion brighteners in the presence of dispersants and, if appropriate, nonionic emulsifiers (GB-1294173, GB-1349934).
• dispersion brighteners e.g. Containing copolymers of styrene-butadiene-acrylic acid esters or styrene-butyl acrylate.
• preparations which, in addition to at least one dispersion brightener and at least one dispersant and / or emulsifier, optionally further additives and water, also contain at least one specific sches above 40 ° C to 200 ° C, preferably up to 120 ° C melting, water-insoluble aromatic or C14-C18 fatty alcoholic auxiliary or mixture of additives surprisingly do not show these disadvantages.
• benzylphenyl ketone salicylic acid phenyl ester, benzophenone, dibenzyl, p-benzyl biphenyl, benzenesulfanilide, 1-hydroxy-2-phenylnaphthoate, terephthalic acid diphenyl ester, terephthalic acid dimethyl ester and / or phthalic acid cyclo (PD) phthalate.
• benzylphenyl ketone salicylic acid phenyl ester
• benzophenone dibenzyl
• terephthalic acid diphenyl ester terephthalic acid dimethyl ester
• PD phthalic acid cyclo
• auxiliaries are used in amounts of 0.1 to 150 parts, in particular in amounts of 1 to 100 parts and especially in amounts of 9 to 100 parts based on 1 part of dispersion brightener.
• Water-insoluble or water-insoluble brighteners as described, for example, in DE-A-2806195 are used as dispersion brighteners, but dispersion brighteners from the class of coumarins and / or benzoxazoles, in particular benzoxazolylthiophenes, are preferably used.
• the dispersion brighteners are known.
• the preparation according to the invention contains conventional anionic or cationic and / or nonionic emulsifiers and / or dispersants, preferably in amounts of 2-20%, in particular 5-10%, based on the sum of dispersion brighteners and auxiliaries.
• anionic emulsifiers are: Carboxylic acids and their salts, such as the sodium, potassium or ammonium salts of lauric, stearic or oleic acid, acylation products of aminocarboxylic acids and their salts, for example the sodium salt of oleoyl sarcoside.
• Sulphates such as fatty alcohol sulphates, eg lauryl sulphate and lorole sulphate, sulphates of hydroxy fatty acid esters, eg sulphated castor oil, of fatty acid hydroxyalkylamides, eg sulphated coconut fatty acid ethanol amide as well as sulphates of partially esterified or etherified polyhydroxy compounds such as sulphated oleic acid monoglycerate sulphate polyglycol ether sulfate, glycerol glycol sulfate, glycerol ether sulfate, and glycerol ether sulfate, as well Sulfonates such as primary and secondary alkyl sulfonates, for example C12-C16 paraffin sulfonic acids or their sodium salts, alkyl sulfonates with amide- or with ester-like acyl radicals such as oleyl methyl tauride and
• nonionic emulsifiers examples include: Esters and ethers of polyalcohols, such as alkyl polyglycol ethers, for example lauryl alcohol or oleyl alcohol, polyethylene glycol ethers, acyl polyglycol ethers such as oleic acid polyglycol ethers, alkylaryl polyglycol ethers such as the ethoxylation products of nonyl and dodecylphenol, acylated amino-alkanol polyglycol ethers, and also the known fatty acid amides, such as non-ionic amines, such as non-ionic amides, such as die amine acid amides, such as non-ionic amides, such as die amine ionides derived from sugars and their derivatives.
• polyalcohols such as alkyl polyglycol ethers, for example lauryl alcohol or oleyl alcohol, polyethylene glycol ethers, acyl polyglycol ether
• the anionic dispersants are the usual dispersants, for example condensation products of aromatic sulfonic acids with formaldehyde or lignin sulfonates, for example the compounds obtainable under the name sulfite waste liquor.
• naphthalene sulfonic acid / formaldehyde condensation products are particularly suitable. Mixtures of these dispersants can also be used.
• Some of the ethylene oxide units can be replaced by other epoxides, e.g. Styrene oxide or, in particular, propylene oxide.
• Mixtures of the ethylene oxide adducts according to a) to f) with one another can also be used. These mixtures are obtained by mixing individual reaction products or directly by ethoxylating a mixture of the compounds on which the adducts are based. An ethoxylated nonylphenol is preferably used.
• Quaternary fatty amine polyglycol ethers are suitable as cationic dispersants.
• the preparation can also contain 45-95% water, preservatives and defoamers. However, the solid preparations are preferred.
• the preparations according to the invention are prepared by simply mixing or dry grinding the components or by melting the dispersion brightener and the auxiliary, if appropriate in the presence of dispersants and / or emulsifiers, allowing them to solidify and then, if appropriate, dry-grinding or, if appropriate, wet-grinding in the presence of dispersants and / or emulsifiers will.
• the preparations according to the invention are suitable for lightening the coating slips usually used in the paper industry, specifically for lightening unpigmented, but in particular pigmented coating slips.
• These known coating slips contain, inter alia, binders.
• a preferred binder consists of styrene-butyl acrylate or styrene-butadiene-acrylic acid mixed polymers. Further polymer latices are described, for example, in US Pat. Nos. 3,265,654, 3,657,174, 3,547,899 and 3,240,740. The preparation according to the invention is incorporated into these binders, for example by means of melt emulsification.
• Aluminum silicates such as china clay and kaolin, barium sulfate, satin white, titanium dioxide or calcium carbonate (chalk) are usually used to pigment the coating slips.
• the coating slips according to the invention preferably contain 30 to 70% of a white pigment.
• the binder is preferably used in an amount sufficient that the dry content of polymeric compound is 1 to 30 percent by weight, preferably 5 to 25 percent by weight, of the white pigment.
• the amount of the brightener preparation according to the invention is calculated in such a way that the dispersion brightener is present in amounts of 0.001 to 1 percent by weight, in particular 0.01 to 0.55 percent by weight, based on the white pigment.
• the coating slip according to the invention can be produced by mixing the components in any order at temperatures from 10 to 100 ° C., preferably 20 to 80 ° C.
• the components here also include the usual auxiliaries that can be used to regulate the rheological properties such as viscosity or water retention capacity of the coating slips.
• auxiliaries that can be used to regulate the rheological properties such as viscosity or water retention capacity of the coating slips.
• Such tools are e.g.
• binders such as starch, casein, protein or gelatin, cellulose ethers such as carboxyalkyl cellulose or hydroxyalkyl cellulose, alginic acid, alginates, polyethylene oxide or polyethylene oxide alkyl ethers, copolymers of ethylene oxide and propylene oxide, polyvinyl alcohol, polyvinyl pyrrolidone, water-soluble condensation products of formaldehyde with urea or melamine, polyphosphate salts or polyphosphates.
• cellulose ethers such as carboxyalkyl cellulose or hydroxyalkyl cellulose, alginic acid, alginates, polyethylene oxide or polyethylene oxide alkyl ethers, copolymers of ethylene oxide and propylene oxide, polyvinyl alcohol, polyvinyl pyrrolidone, water-soluble condensation products of formaldehyde with urea or melamine, polyphosphate salts or polyphosphates.
• the coating slip according to the invention can be used to coat paper, wood, foils such as e.g. Polypropylene, polyethylene, polyester, cellulose, cellulose triacetate, textiles, non-woven materials and suitable building materials such as Wallpaper, room cladding, plastic covers can be used. Use on paper and cardboard and photo paper is particularly preferred.
• the coating slip can be applied to the substrate by any conventional method, for example using an air knife, a doctor knife, a brush, a roller, a squeegee or a stick, followed by coating with, for example, infrared dryers and / or hot air dryers at paper surface temperatures in the range of 70 up to 200 ° C, preferably 90 to 130 ° C, to a residual moisture content of 3-6%. Comparably high degrees of whiteness are thus achieved even at low drying temperatures.
• the coatings obtained are distinguished by an optimal distribution of the dispersion brighteners over the entire surface and a consequent increase in the white level and high light fastness.
• the brightener of the formula is ground with the parts of the components listed in Table 1 at room temperature for 15 hours in a glass bead mixer (glass bead diameter 2 mm) in the presence of water.
• the brightener according to Example 1 is melted together with the components and parts shown in Table 2, dry-ground after cooling and then dispersed according to Example 1 in water.
• Table 1 Prep no. Share tools Parts brightener acc. example 1 Naphthalenesulfonic acid / formaldehyde Nonylphenol (35 AeO) 1.1 90 PDCH 10th 5% 1.2 90 PDCH 10th 10% 1.3 90 PDCH 10th 10% 1.4 85 PDCH 15 10% 1.5 90 benzophenone 10th 10% 1.6 90 dibenzyl 10th 10% 1.7 90 benzylphenyl ketone 10th 10% The homogeneous dispersions obtained are pourable and stable in storage.
• the percentages in Table 1 relate to the total dry matter of brightener and auxiliary Prep no. Share tools Parts brightener Naphthalenesulfonic acid / formaldehyde Nonylphenol (35 AeO) 2.1 90 PDCH 10th 5% 2.2 90 PDCH 10th 10% 2.3 90 PDCH 10th 5% 2.4 90 PDCH 10th 10% 2.5 85 PDCH 15 10% 2.6 80 PDCH 20th 10% 2.7 90 benzophenone 10th 10% The homogeneous dispersions obtained are pourable and stable in storage.
• the percentages in Table 2 relate to the total dry matter of brightener and auxiliary.
• 700 g of a commercially available kaolin pigment and 300 g of a commercially available calcium carbonate pigment are dispersed with 385 g of water, 5 g of a dispersant based on sodium salt of a polycarboxylic acid at a pH of about 9 and under the action of strong shear forces.
• 240 g of a commercially available 50% polymer dispersion based on styrene-butyl acrylate copolymer Acronal S 320 D from BASF) and one of the brightener dispersion described in Examples 1 to 2 are added to the resulting pigment dispersion and stirred.
• the brightener is used at 0.3%, based on the amount of pigment used.
• the coating color is then adjusted to a solids content of 50% by dilution with water.
• the coat is applied to wood-free coating paper with the help of a hand squeegee and acid-glued using the usual methods, so that the coat weight after drying with the help of an IR radiator is approx. 15 g per m2. The residual moisture still present after this drying is approx. 2%.
• the whiteness of the coating is determined according to "Ciba-Geigy whiteness", as described in "Status of the instrumental whiteness assessment with special consideration of the lighting", textile finishing 5/1983, pp. 157-162.
• the degree of whiteness of the preparations 1.1 to 2.7 is given in Table 3.
• Table 3 example Preparation no. Ciba-Geigy whiteness 1 1.1 116.0 1.2 118.0 1.3 109.0 1.4 101.2 1.5 68.5 1.6 92.3 1.7 109.1 2nd 2.1 127.5 2.2 124.6 2.3 112.8 2.4 112.0 2.5 111.1 2.6 103.7 2.7 96.8
• a coating slip without additive, but with 0.3% of the brightener according to Example 1 and the dispersants mentioned in Table 4 is prepared and applied analogously to the procedure used in Example 3 (preparations 4.1 to 4.4).
• the results of the whiteness measurement are compared in Table 4 to those corresponding preparations from Example 2.
• Table 4 Prep no. Naphthalenesulfonic acid / formaldehyde Nonylphenol (35 AeO) Ciba-Geigy whiteness Prep no. in% based on the brightener) 4.1 5% 62.2 127.5 2.1 4.2 10% 59.5 124.6 2.2 4.3 5% 75.3 112.8 2.3 4.4 10% 73.7 112.0 2.4
• the coating color thus obtained is adjusted to a solids content of 50% by dilution with water, applied in accordance with Example 3b) and the degree of whiteness is determined in accordance with Example 3c).
• the degrees of whiteness are shown in Table 5.
• Table 5 Prep no.
• Example 5a solid preparations with a brightener each of the formula and the components and parts specified in Table 6. These preparations are processed according to Example 5b). The degrees of whiteness are shown in Table 6.
• Table 6 Prep no. Share tools Parts brightener Emulsifier 2) 100% dry content CG whiteness with 0.1% brightener 1) 6.1 90 PDCH 10 brighteners (1) 5% emulsifier 3) 96 6.2 90 PDCH 10 brighteners (2) 5% emulsifier 3) 96 6.3 90 PDCH 10 brighteners (3) 5% emulsifier 3) 85 6.4 90 PDCH 10 brighteners (4) 5% emulsifier 3) 83 6.5 90 PDCH 10 brighteners (5) 5% emulsifier 3) 96 6.6 90 PDCH 5 brighteners (1) 5% emulsifier 3) 90 5 brighteners (6) 6.7 90 PDCH 2.5 brighteners (1) 5% emulsifier 3) 96 2.5 brighteners (2) 2.5 brighteners (4) 2.5 brighten

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• 1988
  • 1988-08-17 DE DE8888810563T patent/DE3868462D1/de not_active Expired - Lifetime
  • 1988-08-17 ES ES198888810563T patent/ES2029345T3/es not_active Expired - Lifetime
  • 1988-08-17 EP EP88810563A patent/EP0306447B1/fr not_active Expired - Lifetime
  • 1988-08-24 CA CA000575535A patent/CA1327429C/fr not_active Expired - Fee Related
• 1990
  • 1990-01-24 US US07/469,704 patent/US5064570A/en not_active Expired - Fee Related

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