EP0693029A1 - Druckempfindliches aufzeichnungspapier - Google Patents
Druckempfindliches aufzeichnungspapierInfo
- Publication number
- EP0693029A1 EP0693029A1 EP94911122A EP94911122A EP0693029A1 EP 0693029 A1 EP0693029 A1 EP 0693029A1 EP 94911122 A EP94911122 A EP 94911122A EP 94911122 A EP94911122 A EP 94911122A EP 0693029 A1 EP0693029 A1 EP 0693029A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- recording paper
- sensitive recording
- microcapsules
- starch
- 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.)
- Granted
Links
- 229920000881 Modified starch Polymers 0.000 claims abstract description 22
- 235000019426 modified starch Nutrition 0.000 claims abstract description 22
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- 229920000126 latex Polymers 0.000 claims abstract description 11
- 239000004816 latex Substances 0.000 claims abstract description 10
- 239000004368 Modified starch Substances 0.000 claims abstract description 9
- 239000003094 microcapsule Substances 0.000 claims description 39
- 229920002472 Starch Polymers 0.000 claims description 10
- 239000008107 starch Substances 0.000 claims description 10
- 235000019698 starch Nutrition 0.000 claims description 10
- 229920002396 Polyurea Polymers 0.000 claims description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 230000002378 acidificating effect Effects 0.000 claims description 8
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000002356 single layer Substances 0.000 abstract 1
- 239000002775 capsule Substances 0.000 description 17
- 238000000576 coating method Methods 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 13
- 238000012360 testing method Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000000370 acceptor Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 4
- 239000008199 coating composition Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 230000002028 premature Effects 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920000084 Gum arabic Polymers 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- 241000978776 Senegalia senegal Species 0.000 description 2
- 239000000205 acacia gum Substances 0.000 description 2
- 235000010489 acacia gum Nutrition 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 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 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920000768 polyamine Polymers 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KSSJBGNOJJETTC-UHFFFAOYSA-N COC1=C(C=CC=C1)N(C1=CC=2C3(C4=CC(=CC=C4C=2C=C1)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC(=CC=C1C=1C=CC(=CC=13)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC=C(C=C1)OC Chemical compound COC1=C(C=CC=C1)N(C1=CC=2C3(C4=CC(=CC=C4C=2C=C1)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC(=CC=C1C=1C=CC(=CC=13)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC=C(C=C1)OC KSSJBGNOJJETTC-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229920002085 Dialdehyde starch Polymers 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000001828 Gelatine Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000007963 capsule composition Substances 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical group O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- WMWXXXSCZVGQAR-UHFFFAOYSA-N dialuminum;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3] WMWXXXSCZVGQAR-UHFFFAOYSA-N 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- NHWGPUVJQFTOQX-UHFFFAOYSA-N ethyl-[2-[2-[ethyl(dimethyl)azaniumyl]ethyl-methylamino]ethyl]-dimethylazanium Chemical compound CC[N+](C)(C)CCN(C)CC[N+](C)(C)CC NHWGPUVJQFTOQX-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- FWQHNLCNFPYBCA-UHFFFAOYSA-N fluoran Chemical class C12=CC=CC=C2OC2=CC=CC=C2C11OC(=O)C2=CC=CC=C21 FWQHNLCNFPYBCA-UHFFFAOYSA-N 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
- B41M5/132—Chemical colour-forming components; Additives or binders therefor
- B41M5/155—Colour-developing components, e.g. acidic compounds; Additives or binders therefor; Layers containing such colour-developing components, additives or binders
Definitions
- the present invention relates to a pressure-sensitive recording paper of the SC type, in which microcapsules, a color developer for the color former solution contained in the microcapsules, spacers and a binder are contained in one layer.
- Pressure-sensitive recording papers of the SC type are known. A distinction is made between recording sheets in which microcapsules and color acceptors are arranged in one layer or in layers one on top of the other.
- DE-C-10 10 822 describes a binder-free SC paper which is produced in a coating process, the color acceptor consisting of attapulgite being added and mixed to the capsule composition suspended in water, and the paper coating composition formed being applied to a paper and dried.
- the capsule walls are made of hydrophilic colloid material.
- DE-A-16 71 544 relates to an SC paper in which, in order to avoid an unwanted color reaction of the coating composition containing the capsules, a water-soluble alkyd resin, a water-dispersible metal soap, a water-dispersible paraffin or an aqueous emulsion of a paraffin wax and natural resin or a mixture of these materials is attached.
- the color acceptor can optionally be added to the capsule mass or applied to the paper sheet either before or after application of the capsule mass.
- Gelatine and gum arabic are used to manufacture the capsules.
- DE-A-24 46 313 relates to color formers based on fluoran compounds and their use both in pressure-sensitive and in heat-sensitive recording materials. Both CB sheets and so-called SC sheets are described as examples. Pig skin gelatin and gum arabic are given as capsule wall material. Insofar as the production of SC sheets from a composition containing the microcapsules and the color developer is described, this composition contains polyvinyl alcohol.
- a copying paper with microcapsules, the capsule walls of which are formed by polyaddition from an isocyanate and a tetra- or pentamine, is disclosed in DE-A-27 53 767.
- SC paper according to DE-A-29 30 408 is known, the microcapsule walls consisting of polyurea formed by reacting a polyisocyanate with a polyamine and water and the color developer a polysilicate formed in situ during the reaction of the polyisocyanate and polyamine and / or aluminum oxide hydrate, which is formed by precipitation from silica sol and / or aluminum hydrate.
- the type of binder used is not specified.
- DE-A-28 20 462 and DE-A-29 43 792 and according to EP-A-0 011 367 to include both color formers and organic color acceptors in microcapsules.
- DE-A-28 20 462 mentioned above also provides for the unencapsulated use of either color formers or color developers, but modified starches and SBR latices are not disclosed among a large number of binders, but their joint use is not disclosed.
- a pressure-sensitive recording paper of the SC type is known, in which a water-soluble polymer is added to the color development layer in addition to dialdehyde starch as a binder.
- the encapsulated color developer is organic in nature.
- DE-A-29 09 950 has also already proposed a mixture of solvents for the color former To use alkylnaphthalene and isoparaffin and to anneal the microcapsules after their formation. The manufacture of SC-type pressure sensitive papers has not been addressed.
- an SC-type pressure-sensitive recording paper is known from GB-B-15 24 742.
- the color developer and / or the microcapsules are marked with a protective substance, e.g. B. encased a urea resin or a melamine-formaldehyde polymer.
- the invention has the object of providing a pressure-sensitive recording paper of the SC type, in which the microcapsules have increased tightness. Even after prolonged storage, there should be no discoloration which would impair readability.
- the cumbersome measures of a special coating of the microcapsules and / or the color developer and the production in one should be avoided be carried out in a single operation, ie the application of the color reaction layer from a coating composition containing both microcapsules and color developers may be possible.
- the task also includes a special problem which arises in the production of coating slips which are produced using microcapsules with walls made of polyurea and with mineral color developers. The problem is that between the mineral color developers made of pigment, e.g. B.
- Another object of the invention is to achieve the desired improvement in capsule tightness without other valuable properties, such as. B. decrease sufficient color intensity of the typeface generated or sufficient printability of the color reaction layer in offset printing.
- the invention wants to provide a pressure-sensitive recording paper of the SC type which, on the one hand, has a higher resistance to mechanical stress, for example in the case of Further processing, but on the other hand has no poorer copy performance.
- the invention provides for a pressure-sensitive recording paper of the SC type, in which microcapsules, a color developer for the color former solution contained in the microcapsules, spacers and a binder are contained in a layer that the binder contains modified starch and / or a Starch derivative and a synthetic latex contains.
- modified starch and / or a starch derivative considerably reduces the permeability of microcapsules to the color former solution contained in the microcapsules, especially if their walls consist of polyurea. Even with prolonged storage, there is therefore far less premature release of the color former solution and the associated unwanted color reaction with the color developer.
- the binder preferably contains a starch ester or starch ether.
- a latex based on butadiene-styrene has proven to be suitable as a synthetic latex.
- Modified starch and / or starch derivative is preferably present in the layer in an amount of 5 to 25% by weight, very particularly preferably at least 8% by weight, based on the mass of the microcapsules, calculated as parts by dry weight.
- the amount of binder is preferably 5 to 20 parts by weight, in particular not more than 15 parts by weight, based on the mass per unit area of the layer, in each case calculated in parts by dry weight.
- the walls of the microcapsule consist of polyurea
- the invention is not restricted to this and can also be applied to other capsule wall materials, e.g. for microcapsules made of melamine formaldehyde.
- the modified starches and / or starch derivatives used in the binder are not film-forming.
- acidic clays, activated clays, preferably clays whose main constituent is montmorillonite are used as color developers.
- acidic resins are used as color developers.
- the invention is not restricted to the color formers to be used and the solvents used to dissolve them; all electron donors and color formers which react with mineral color developers or acidic resins (electron acceptors) can be used.
- Undissolved starch granules or cellulose fibers are preferably used as spacers.
- inert pigments such as kaolin or calcium carbonate, can also be present in the layer or the coating slip used for its production.
- the layer is preferably applied with a surface area of not less than 6 and not more than 11 g / m 2 .
- Starch granules as spacers 12.6 parts by weight of butadiene styrene latex 11.6 parts by weight of acid clay 35.4 parts by weight
- the solids content of the coating slip was 35% by weight.
- the microcapsule used is a polyurea capsule with a color former solution resulting in a black typeface.
- a coating slip was produced in which the procedure was as in the comparative example, but as a binder a mixture of 6.1 parts by weight of a modified starch (medium-depolymerized) - Sobex 222 from SüdStar and 5.1 parts by weight of the same butadiene styrene latex used in the comparative example.
- Example 2
- the coated coating slips were applied to a sized coating base paper, in the comparison example 10 g / m - * -; in Examples 1 and 2 each 9 g / rn- ⁇ .
- Starch granules as spacers 12.6 parts by weight butadiene styrene latex 14.0 parts by weight acidic clay 37.5 parts by weight
- composition of the microcapsule dispersion corresponds to that in Example 3, but no starch is used and instead the proportion of the butadiene styrene latex is increased to 16.3 parts by weight.
- microcapsule dispersions according to Example 3 and Comparative Example 2 adjusted to a solids content of 35% by weight, were applied to a sized coating base paper with the application weights shown in FIG. 1.
- test pressure device from educable, Dr.-Ing. Dürner, P formulateenberg near Kunststoff.
- the discoloration of the test strip is measured on a data color device as a difference (intensity) from the unprinted area.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Color Printing (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI9430071T SI0693029T1 (en) | 1993-04-08 | 1994-03-08 | Pressure-sensitive recorder paper |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4311463A DE4311463C3 (de) | 1993-04-08 | 1993-04-08 | Druckempfindliches Aufzeichnungspapier |
| DE4311463 | 1993-04-08 | ||
| PCT/EP1994/000703 WO1994023953A1 (de) | 1993-04-08 | 1994-03-08 | Druckempfindliches aufzeichnungspapier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0693029A1 true EP0693029A1 (de) | 1996-01-24 |
| EP0693029B1 EP0693029B1 (de) | 1997-07-02 |
Family
ID=6484982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94911122A Expired - Lifetime EP0693029B1 (de) | 1993-04-08 | 1994-03-08 | Druckempfindliches aufzeichnungspapier |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0693029B1 (de) |
| CZ (1) | CZ257795A3 (de) |
| DE (2) | DE4311463C3 (de) |
| ES (1) | ES2104369T3 (de) |
| WO (1) | WO1994023953A1 (de) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026039B2 (ja) * | 1977-09-05 | 1985-06-21 | 三菱製紙株式会社 | 自己発色型感圧記録紙 |
| JPS5561495A (en) * | 1978-11-02 | 1980-05-09 | Mitsubishi Paper Mills Ltd | Self-color-developing pressure-sensitive recording sheet |
| JPS5964387A (ja) * | 1982-10-06 | 1984-04-12 | Mitsubishi Paper Mills Ltd | 単一層型自己発色性感圧記録材料 |
-
1993
- 1993-04-08 DE DE4311463A patent/DE4311463C3/de not_active Expired - Fee Related
-
1994
- 1994-03-08 CZ CZ952577A patent/CZ257795A3/cs unknown
- 1994-03-08 DE DE59403255T patent/DE59403255D1/de not_active Expired - Fee Related
- 1994-03-08 ES ES94911122T patent/ES2104369T3/es not_active Expired - Lifetime
- 1994-03-08 EP EP94911122A patent/EP0693029B1/de not_active Expired - Lifetime
- 1994-03-08 WO PCT/EP1994/000703 patent/WO1994023953A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9423953A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2104369T3 (es) | 1997-10-01 |
| DE4311463C3 (de) | 1999-07-15 |
| WO1994023953A1 (de) | 1994-10-27 |
| CZ257795A3 (en) | 1996-06-12 |
| DE4311463A1 (de) | 1994-10-13 |
| DE4311463C2 (de) | 1996-09-26 |
| EP0693029B1 (de) | 1997-07-02 |
| DE59403255D1 (de) | 1997-08-07 |
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