GB2314325A - Match head formulations - Google Patents
Match head formulations Download PDFInfo
- Publication number
- GB2314325A GB2314325A GB9612729A GB9612729A GB2314325A GB 2314325 A GB2314325 A GB 2314325A GB 9612729 A GB9612729 A GB 9612729A GB 9612729 A GB9612729 A GB 9612729A GB 2314325 A GB2314325 A GB 2314325A
- Authority
- GB
- United Kingdom
- Prior art keywords
- match head
- formulation
- accordance
- dry weight
- iron
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 146
- 238000009472 formulation Methods 0.000 title claims abstract description 106
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000011574 phosphorus Substances 0.000 claims abstract description 30
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 15
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000013522 chelant Substances 0.000 claims abstract description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 239000011651 chromium Substances 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims abstract description 6
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 239000004310 lactic acid Substances 0.000 claims abstract description 6
- 235000014655 lactic acid Nutrition 0.000 claims abstract description 6
- 239000011975 tartaric acid Substances 0.000 claims abstract description 6
- 235000002906 tartaric acid Nutrition 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims abstract description 6
- 235000015165 citric acid Nutrition 0.000 claims abstract description 5
- NPFOYSMITVOQOS-UHFFFAOYSA-K iron(III) citrate Chemical group [Fe+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NPFOYSMITVOQOS-UHFFFAOYSA-K 0.000 claims description 61
- UMEAURNTRYCPNR-UHFFFAOYSA-N azane;iron(2+) Chemical compound N.[Fe+2] UMEAURNTRYCPNR-UHFFFAOYSA-N 0.000 claims description 18
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 15
- 239000001828 Gelatine Substances 0.000 claims description 15
- 229920000159 gelatin Polymers 0.000 claims description 15
- 235000019322 gelatine Nutrition 0.000 claims description 15
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 14
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 229920002472 Starch Polymers 0.000 claims description 9
- 229960001484 edetic acid Drugs 0.000 claims description 9
- 239000010433 feldspar Substances 0.000 claims description 9
- 239000008107 starch Substances 0.000 claims description 9
- 235000019698 starch Nutrition 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 8
- 235000013312 flour Nutrition 0.000 claims description 8
- ADTJISSNQWNGFP-UHFFFAOYSA-N 4-dodecan-3-ylbenzenesulfonic acid;propan-2-amine Chemical group CC(C)N.CCCCCCCCCC(CC)C1=CC=C(S(O)(=O)=O)C=C1 ADTJISSNQWNGFP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 7
- 239000011640 ferrous citrate Substances 0.000 claims description 6
- 235000019850 ferrous citrate Nutrition 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 5
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 5
- 239000002738 chelating agent Substances 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 239000001630 malic acid Substances 0.000 claims description 5
- 235000011090 malic acid Nutrition 0.000 claims description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- -1 potassium citrate Chemical class 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000002562 thickening agent Substances 0.000 claims description 4
- 239000007844 bleaching agent Substances 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 150000004697 chelate complex Chemical class 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 235000010755 mineral Nutrition 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000001508 potassium citrate Substances 0.000 claims description 2
- 229960002635 potassium citrate Drugs 0.000 claims description 2
- QEEAPRPFLLJWCF-UHFFFAOYSA-K potassium citrate (anhydrous) Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 claims description 2
- 235000011082 potassium citrates Nutrition 0.000 claims description 2
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 2
- 150000004696 coordination complex Chemical class 0.000 claims 2
- 150000003839 salts Chemical class 0.000 claims 2
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 claims 1
- 230000007717 exclusion Effects 0.000 claims 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical class [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 9
- 150000001845 chromium compounds Chemical class 0.000 abstract description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011701 zinc Substances 0.000 abstract description 2
- 229910052725 zinc Inorganic materials 0.000 abstract description 2
- VAKIVKMUBMZANL-UHFFFAOYSA-N iron phosphide Chemical compound P.[Fe].[Fe].[Fe] VAKIVKMUBMZANL-UHFFFAOYSA-N 0.000 abstract 1
- 150000003018 phosphorus compounds Chemical class 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 description 28
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 10
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 8
- 235000013980 iron oxide Nutrition 0.000 description 7
- 239000005864 Sulphur Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000004408 titanium dioxide Substances 0.000 description 6
- 235000019738 Limestone Nutrition 0.000 description 5
- FRHBOQMZUOWXQL-UHFFFAOYSA-K azane;2-hydroxypropane-1,2,3-tricarboxylate;iron(3+) Chemical compound N.[Fe+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O FRHBOQMZUOWXQL-UHFFFAOYSA-K 0.000 description 5
- 239000004313 iron ammonium citrate Substances 0.000 description 5
- 235000000011 iron ammonium citrate Nutrition 0.000 description 5
- 239000006028 limestone Substances 0.000 description 5
- 239000011787 zinc oxide Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Natural products OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000000174 gluconic acid Substances 0.000 description 2
- 235000012208 gluconic acid Nutrition 0.000 description 2
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PHTXVQQRWJXYPP-UHFFFAOYSA-N ethyltrifluoromethylaminoindane Chemical compound C1=C(C(F)(F)F)C=C2CC(NCC)CC2=C1 PHTXVQQRWJXYPP-UHFFFAOYSA-N 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000014786 phosphorus Nutrition 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/002—Sensitisers or density reducing agents, foam stabilisers, crystal habit modifiers
- C06B23/004—Chemical sensitisers
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
- C06B29/02—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06F—MATCHES; MANUFACTURE OF MATCHES
- C06F3/00—Chemical features in the manufacture of matches
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Dental Preparations (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Paper (AREA)
- Fertilizers (AREA)
- Road Signs Or Road Markings (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
- Cosmetics (AREA)
- Seal Device For Vehicle (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Graft Or Block Polymers (AREA)
- Lubricants (AREA)
- Compounds Of Iron (AREA)
- Polymerisation Methods In General (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Magnetic Heads (AREA)
- Laminated Bodies (AREA)
- Emergency Lowering Means (AREA)
Abstract
Match head formulations suitable for the production of safety matches and matches that may be struck anywhere are described which include metal chelate complexes of iron, copper, chromium or vanadium and citric acid, lactic acid, tartaric acid and EDTA. The metal chelate complexes may be combined with conventional match head compositions in which chromium compounds, sesqui-based phosphorus compounds, sulphur compounds and oxides of zinc present or preferably combined with environmentally friendly compositions using either amorphous phosphorus or, optionally, in the case of match head formulations suitable for the production of safety matches, an iron phosphide known as ferrophosphorus. These formulations are environmentally friendly both in manufacture and use. Environmentally friendly match head formulations which may be brightly coloured are also described.
Description
2314325 MATCH HEAD FORMULATIONS 1 The present invention relates to match
head formulations suitable for the production of safety matches as well as matches that may be struck anywhere and to matches formed when coated with the said formulations.
For many years match head formulations have contained chromium compounds, phosphorus sesquisulphide, sulphur and/or sulphur compounds and zinc oxide. These compounds are now widely recognised as having undesirable environmental properties both in relation to the manufacture of such formulations and in relation to their use and it is therefore an object of the present invention to provide a match head formulation in which these compounds are substantially absent.
One type of match in common use has a match head formulation which is ignited by an abrasive contact with any suitable roughened surface. These are referred to as "strike anywhere' matches. A second type of match in common use has a match head formulation which is ignited by an abrasive contact with a surface containing a formulation for initiating ignition of the match head. These are referred to as safety matches'.
UK-A-2252312 discloses compositions which comprise phosphorus or ferrophosphorus and excluding environmentally harmful components containing sulphur, chromium or zinc. Phosphorus match compositions for safety matches as well as strike anywhere matches are disclosed, the' strike anywhere formulations comprising larger proportions of.phosphorus.
Matches made using these formulations have excellenI '.,environmentally friendly properties. The purpose of this invention is to improve the control of the sensitivity properties whilst at the same time r"etai,ni. hg the environmentally friendly properties of the match head. Control of the sensitivity influences the striking force required to be applied by the user in order to ignite the match head. If it is too high, this may result in breakage of the head, or alternatively breakage of the splint before ignition has occurred. In addition if the strike force required is too high this may increase the risk of accidents by flying heads or broken splints where the heads have ignited. This is also the case with conventional match compositions that the matches may be too difficult to ignite. Alternatively if the match head is too easy to light this may lead to premature ignition creating the danger of fires.
It is possible to come across matches having different properties and a problem is to achieve a guaranteed consistent desired balance of the ignition sensitivity.
It is therefore an object of the invention to provide a match head formulation which has sufficient sensitivity to guarantee consistent ignition. It is also an object of the present invention to achieve precise control over the sensitivity of the match head so that the desired consistency of sensitivity can be guaranteed. These objectives are to be achieved without detriment to the other properties of the match head formulation and which can be made by the same manufacturing techniques and without adding significantly to the cost.
According to a first aspect of the present invention there is provided a match head formulation suitable for the production of strike anywhere matches or safety matches wherein the match head formulation comprises a component which is a chelating agent such as EDTA (ethylene diamine tetraacetic acid), citric acid, lactic acid, tartaric acid, malic acid, or gluconic or other alpha hydroxy carboxylic acids, said chelating agent being complexed with a metal which may be selected from the following: manganese, Iron, cobalt, nickel, chromium, copper or vanadium.
Preferably the metal chelate is iron citrate which is preferably in the form of ammonium iron Ill citrate which is soluble in water.
In a preferred embodiment of this first aspect of the present invention the density of the formulation when in the form of a wet composition is in a range from 1. 1 to 1.4 g/CM3. Preferably the composition includes potassium chlorate present is in the range from 40 to 60 percent dry weight while the red amorphous phosphorus is present in a proportion of up to 9 percent dry weight for strike anywhere matches and up to 2 per cent dry weight for safety matches. Gelatine may provide a suitable binder if present in proportions ranging from 3 to 18 percent dry weight or alternatively the binder may be in the form of animal glue. The thickener is preferably a starch present in proportions of up to 5 percent dry weight while feldspar or other siliceous minerals may be chosen as the filler. The formulation may also include an ash improver, a pigment and a bleaching agent. A foaming agent may be Arylan PWS an amine salt of an alkyl aryl sulphonic acid present in proportions of up to 0.2 percent dry weight. The formulation may also include an ash improver such as infusoria in proportions of up to 6 percent dry weight or a cellulose flour such as olivestone flour in proportions of up to 7 percent dry weight and a pigment such as iron oxide in proportions ranging from 3 to 10 percent dry weight.
The composition may also include ferrophosphorus (a mixture of iron phosphides containing typically between 18 and 25 percent phosphorus).
In a preferred embodiment of the invention the iron citrate is provided in the form of ammonium iron Ill citrate. Alternatively the iron citrate is provided in the form of Iron (111) citrate. Alternatively the iron citrate is provided in the form of ferrous citrate monohydrate.
In a preferred embodiment of the invention the proportion of iron citrate of the match head composition is 0.01 % to 2.14 % by dry weight. In a further preferred embodiment of the invention the proportion of iron citrate in the match head composition is 0.15 % to 1.5 % by dry weight. In a further preferred embodiment of the invention the proportion of iron citrate in the match head composition is 0.4 % to 0.9 % by dry weight.
In a further preferred embodiment of the invention the proportion of phosphorus in the match head composition in the range from 0.01 % to 9 % by dry weight.
Some examples of the present invention will now be described with reference to formulations suitable for the production of safety matches and strike anywhere matches.
In the past match head formulations suitable for the production of stoke anywhere matches have contained phosphorus sesquisulphide compounds as the active ingredient. Alternatively phosphorus sesquisulphide may be replaced by red amorphous phosphorus.
Example 1
A match head formulation suitable for the production of strike anywhere matches is prepared in which 48.34 percent dry weight of potassium chlorate is mixed with 12.43 percent dry weight of gelatine, 2.76 percent dry weight of starch, 20.72 percent dry weight of feldspar, 0.35 percent dry weight of Eosin, 2.76 percent dry weight of titanium dioxide, 6.90 percent dry weight of limestone, and 0.21 percent dry weight of sodium dithionite ensuring good wetting and dispersion of all the ingredients before adding 5 percent dry weight of red amorphous phosphorus as an aqueous slurry and 0.57 per cent dry weight iron citrate in the form of ammonium iron (iii) citrate.
The above formulation combines a satisfactory sensitivity and bum rate and has no propensity to produce burning fragments or dropping of hot ash. The formulation also provides cost benefits over other existing formulations. The sensitivity is improved markedly when compared to formulations not comprising the iron citrate.
The water content of the above formulation may be in the range from 40 to 50g per 1 00g of solids but is typically 45.6g/ 1 00g solids.
The density of the formulation when in the form of a wet composition may be in the range of 1.1 to 1.4 g/CM3 but is typically 1.2 to 1.35 g/CM3. This figure is lower than is usual for match head formulations of this type as a result of being more highly aerated and contributes towards an improved sensitivity and a faster drying rate. The formulation is thus able to dry even during freak spells of high atmospheric humidity.
The proportions of potassium chlorate present may range from 40 to 60 percent dry weight while the red amorphous phosphorus may be present in proportions of up to 9 and as low as 1 percent dry weight for the formulation to maintain a satisfactory performance. The iron citrate may be present in proportions between 0.01 % and 2.5 % dry weight.
The following table shows the change in sensitivity measured in grams with increasing amounts of Iron Citrate:
Table 1: Strike anywhere composition with 5% Red Phosphorus % Iron Citrate 0.00 0.15 0.43 0.87 1.43 2.14 Sensitivity (g) 212 197 160 164 153 163 Equally the proportion of red phosphorus may be varied to attain the optimum level for the amount of iron citrate.
Table 2: Strike anywhere composition with 0.6% Iron citrate % Red Phosphorus 0.00 1.0 2.0 3.0 4.0 Sensitivity (g) will not will not strike strike 272 201 163 In the above experiments the iron citrate is provided in the form of ammonium iron (111) citrate. Alternatively the iron citrate may be provided in the form of Iron (111) citrate or ferrous citrate monohydrate.
The term iron citrate will be used a the general term throughout this specification to describe chelating complexes containing iron and citrate which may not be definite compounds. The iron content can vary widely from 15 % to 28 % depending on which form of iron citrate is used. The water soluble complexes, for example, also contain ammonia. The effectiveness of any particular complex depends upon and is proportional to the iron content. The same is true if different metals are used.
The iron citrate complex may also be formed in situ by the addition of any citrate such as for example potassium citrate to the composition and an iron salt such as for example iron Ill sulphate. These two compounds will react together to form the soluble iron citrate complex. Many other alternative compounds could be used with the corresponding reactions producing the desired complex. This is also true for the other complexes envisaged by the invention formed from any of the metals namely, manganese, cobalt, nickel, chromium, copper or vanadium with the chelating agents; lactic acid, tartaric acid, malic acid, gluconic or other alpha hydroxy carboxylic acids or EDTA.
The gelatine is present as a binder. The binder content of the formulation is lower than is usual and consequently improves the sensitivity of the formulation as well as the drying rate. The gelatine may be present in proportions ranging from 8 to 18 percent dry weight. In place of gelatine animal glue may provide a satisfactory binding agent.
Starch is present as a thickener to improve the head formulation during dipping and may be present in proportions ranging from 1 to 4 percent dry weight and still serve its function satisfactorily.
Use of amorphous phosphorus makes it difficult to achieve the clear bright colours characteristic of match head formulations based on phosphorus sesquisulphide. The muddy colour of amorphous phosphorus in the above formulation is particularly difficult to mask in the orange/yellow spectral region and consequently a colourant such as Eosin may be required to be present in proportions of up to 7 percent dry weight. An alternative colourant to produce a match head formulation in the blue/red spectral region such as Rhodamine may not need to be present to such an extent. To assist the colouring of the formulation sodium dithionite may be used to bleach the gelatine while titanium dioxide may be employed as a masking agent. The titanium dioxide may be present in proportions of up to 7 percent dry weight.
Limestone may be present in proportions ranging from 3 to 14 percent dry weight to control the pH of the formulation while feldspar is used as a filler and serves to make up the balance of the formulation.
It is to be noted that the above formulation is free of phosphorus sesquisulphide, zinc oxide and di-chromates. The absence of sulphur from the formulation reduces the smell produced on striking a match coated with the formulation. The absence of phosphorus sesquisulphide is advantageous because it is difficult to handle during manufacture. It is possible to include these components in the formulation in lower proportions than conventionally used with the inclusion of iron citrate in proportions from 0.01 % to 2.5 % to improve and control the sensitivity.
In the past match head formulations suitable for the production of safety matches have contained chromium compounds, sulphur compounds and zinc oxide and in particular have contained potassium dichromate, sulphur powder and zinc oxide. In the second example all these are absent from the formulation and have been replaced in the formulations of the present invention by red amorphous phosphorus and iron citrate.
The experiments were repeated using various combinations of metal chelate complexes, as well as the iron citrate referred to above, of citric acid, lactic acid, tartaric acid, malic acid or EDTA (ethylene diamine tetraacetic acid) as well as gluconic acid (other alpha hydroxy carboxylic acids would also be appropriate), complexed with manganese, iron, cobalt, nickel, chromium, copper and vanadium and similar results were obtained.
Example 2
A match head formulation suitable for the production of safety matches is prepared in which 54.18 percent dry weight of potassium chlorate is mixed with 4.06 percent dry weight of gelatine, 4.06 percent dry weight of starch, 20.32 percent dry weight of feldspar, 2.71 percent dry weight of infusoria, 6.77 percent dry weight of iron oxide, 0.09 percent dry weight of Arylan PWS, and 6.77 percent dry weight of limestone ensuring good wetting and dispersion of all the ingredients before adding 0.5 percent dry weight of amorphous phosphorus as an aqueous slurry and 0.5 per cent dry weight iron (iii) citrate in the form of ammonium iron(iii) citrate.
The water content of the above formulation may be in the range 40 to 55g per 1 00g of solids but is typically 48.8g /1 00g solids.
The density of the formulation when in the form of a wet composition may be in the range from 1.0 to 1.4 g/CM3 but is typically 1.15 g/CM3. As in Example 1 this figure is lower than is usual for match head formulations of this type as a result of being more highly aerated and contributes towards an improved sensitivity and a faster drying rate.
It was found that the proportion of potassium chlorate present may range from 40 to 60 percent dry weight and the proportion of amorphous phosphorus may range from 0.01 to 2.0 percent dry weight for the formulation to maintain a satisfactory performance. The proportion of iron citrate may range from 0.01 % to 2.5 % dry weight.
Example 3
A match head formulation suitable for the production of safety matches is prepared in which 57.98 percent dry weight of potassium chlorate is mixed with 9.28 percent dry weight of glue, 30.97 percent dry weight of an uncoloured pre-mixture of inert materials including silica, aluminosilicates and alkaline earth carbonates, 0.09 percent dry weight of Arylan PWS, and 0.14 percent dry weight of Eosin dye before adding 1.1 percent dry weight of amorphous phosphorus and 0.43 per cent dry weight ammonium iron (iii) citrate. This example provides safety matches which red in colour.
Example 4
A match head formulation suitable for the production of safety matches is prepared in which 55.93 percent dry weight of potassium chlorate is mixed with 8.95 percent dry weight of glue, 33.56 percent dry weight of a brown pre-mixture of inert materials including silica, alumino-silicates, alkaline earth carbonates and iron oxides (the iron oxides functioning to provide the brown head colour), 0.08 percent dry weight of Arylan PWS, before adding 1.06 percent dry weight of amorphous phosphorus and 0.42 per cent dry weight ammonium iron (iii) citrate. This example provides safety matches which are brown in colour.
The following table shows the change in sensitivity measured in grams with increasing amounts of Iron Citrate:
Table 3: Safety composition with 0.86% Red Phosphorus % Iron Citrate 0.00 0.15 0.43 0.87 1.43 2.14 Sensitivity (g) 134 117 99 84 104 94 Equally the proportion of red phosphorus may be varied to attain the optimum level for the amount of iron citrate.
Table 4: Safety composition with 0.6% Iron citrate % Red Phosphorus 0.00 0.29.86 Sensitivity (g) 416 135 86 In the above experiments the iron citrate is provided in the form of ferrous citrate monohydrate. Alternatively the iron citrate may be provided in the form of Iron (111) citrate or ammonium iron (111) citrate.
The gelatine is present as a binder. As in Example 1 the binder content of the formulation is lower than is usual and consequently improves the sensitivity of the formulation as well as the drying rate. Gelatine may be present in proportions ranging from 3 to 12 percent dry weight. In place of gelatine animal glue may provide a satisfactory binding agent.
Again the presence of amorphous phosphorus makes it difficult to achieve clear bright colours but does not hinder the production of standard brown formulations. To this end iron oxide is used as a pigment and may be present in proportions ranging from 3 to 10 percent dry weight.
It is to be noted that the above formulation is free of potassium dichromate, sulphur and zinc oxide. The absence of sulphur from the formulation reduces the smell produced on striking a match coated with the formulation. The absence of potassium dichromate is advantageous because potassium dichromate is difficult to handle during manufacture. However it will be appreciated that according to the invention it is possible to include any of these components in place of red phosphorus in lower proportions with the addition of iron citrate. This will reduce the adverse environmental effect and also improve the sensitivity properties. The person skilled in the art will appreciate that the proportion of iron citrate, used will vary according to the components used in the remainder of the composition and also according to the desired final cost of the composition.
Such safety match compositions may be formulated along the lines of the above example to combine a satisfactory sensitivity and burn rate with no propensity to produce burning fragments or dropping of hot ash. The formulation meets all the requirements of BS 3795 and provides cost benefits over other existing formulations.
Example 5
In order to achieve a more brightly coloured match head formulation suitable for the production of safety matches and having properties similar to those described with reference to Example 2 above 55.52 percent dry weight of potassium chlorate is mixed with 4.16 percent dry weight gelatine, 4.16 percent dry weight of starch, 13.88 percent dry weight of feldspar, 5.55 percent dry weight of infusoria, 0.09 percent dry weight of Arylan PWS, 6.94 percent dry weight of limestone, 6.94 percent dry weight of olivestone flour, up to 7.0 percent dry weight of a chosen pigment, and 1.39 percent dry weight of titanium dioxide ensuring good wetting and dispersion of all the ingredients before adding 0.5 percent dry weight of amorphous phosphorus as an aqueous slurry and 0.5 per cent dry weight of iron citrate in the form of ammonium iron (iii) citrate.
The following table shows the change in sensitivity measured in grams with increasing amounts of Iron Citrate:
Table 5: Safety Match 0.86 % Red Phosphorus % Iron Citrate 0.00 0.15 0.43 0.87 1.43 2.14 Sensitivity (g) 129 118 99 88 105 94 Equally the proportion of red phosphorus may be varied to attain the optimum level for the amount of iron citrate.
Table 6: Safety Match composition with 0.6% Iron citrate % Red Phosphorus 0.00 0.29 0.86 Sensitivity (g) 416 135 86 In the above experiments the iron citrate is provided in the form of ferrous citrate monohydrate. Alternatively the iron citrate may be provided in the form of Iron (111) citrate or ammonium iron (111) citrate.
This formulation is similar to that described in Example 2 above and differs essentially only in that it may be more brightly coloured. Consequently the proportions of the chlorate, amorphous phosphorus, gelatine, starch, infusoria, Arylan PWS, limestone, and feldspar may vary within substantially the same ranges as disclosed in Example 2. Of the constituents not found in that Example olivestone flour acts as an ash improver and may be present in proportions of up to 7 percent dry weight while titanium dioxide may also be present in proportions of up to 7 percent dry weight and acts as a masking agent as described in Example 1. Olivestone flour may be substituted by other cellulose flours.
Exampiq-6 The amorphous phosphorus of the formulations described in Examples 2 and 3 may be replaced by ferrophosphorus, a mixture of iron phosphides containing typically between 18 and 25 percent phosphorus. Ferrophosphorus is relatively inexpensive and easy to handle but is a dense black powder and therefore limits the range of colours attainable.
A match head formulation of this type suitable for the production of safety matches is provided by mixing 52.63 percent dry weight of potassium chlorate with 3.95 percent dry weight of gelatine, 3.95 percent dry weight of starch, 19.73 percent dry weight of feldspar, 6.57 percent dry weight of iron oxide and 12.66 percent dry weight of ferrophosphorus and 0.5 per cent dry weight iron citrate.
The following table shows the change in sensitivity measured in grams with increasing amounts of Iron Citrate:
Table 7: Safety composition with 12% Ferrophosphorus % Iron Citrate 0.00 0.15 0.43 0.87 1.43 2.14 Sensitivity (g) 128 115 97 84 101 93 In the above experiments the iron citrate is provided in the form of ferrous citrate monohydrate. Alternatively the iron citrate may be provided in the form of Iron (111) citrate or ammonium iron (111) citrate.
The experiments were repeated using various combinations of metal chelate complexes of citric acid, lactic acid, tartaric acid, malic acid or EDTA (ethylene diamine tetra-acetic acid) as well as gluconic acid (other alpha hydroxy carboxylic acids would also be appropriate), complexed with manganese, iron, cobalt, nickel, chromium, copper and vanadium and similar results were obtained.
The ferrophosphorus is preferably ground to a particle size of up to 100 microns. The preferred size for the formulation given in example 6 is less than 5 microns. It is to be noted that with a particle size between 20 and 65 microns it is possible to produce a composition with a colour other than black by using dyes. Ferrophosphorus in this range of particle size has been found to be beneficial in a range of pyrotechnic applications.
While it was found that the proportion of potassium chlorate present may range from 40 to 60 percent dry weight the proportion of ferrophosphorus was required to exceed 5 percent dry weight in order to maintain a satisfactory performance.
The proportion of gelatine present in the formulation was found to be able to range from 3 to 12 percent dry weight while the starch could be present in proportions of up to 10 percent dry weight. As in previous examples feldspar is used as a filler and serves to make up the balance of the formulation.
If despite the nature of ferrophosphorus a more brightly coloured formulation is required the iron oxide may be omitted and replaced by titanium dioxide and a suitable pigment each in proportions of up to 7 percent dry weight.
It will be understood that it may be possible in all the above examples to include higher amounts of iron citrate, or the metal chelate complex concerned, which may not improve the sensitivity nor adversely effect the properties of the composition in other ways but would add unnecessarily to the cost of the formulation.
Of all the metal chelate complexes, iron citrate was shown to be effective as a controller of the sensitivity of the match head composition and also is the most environmentally f riendly and the most cost effective.
Claims (29)
1 A match head formulation suitable for the production of strike anywhere matches or safety matches wherein the match head formulation comprises a component which is a chelating agent such as EDTA (ethylene diamine tetra-acetic acid), citric acid, lactic acid, tartaric acid, malic acid, or gluconic or other alpha hydroxy carboxylic acids, said chelating agent being complexed with a metal which may be selected from the following: manganese, Iron, cobalt, nickel, chromium, copper or vanadium.
2. A match head formulation according to claim 1, characterised in that the metal chelate complex is iron citrate.
3. A match head formulation according to claim 1 or 2, characterised in that it comprises potassium chlorate and red amorphous phosphorus, the balance being made up of a binder, a thickener, a filler, and a foaming agent to the exclusion of phosphorous sesquisulphide.
4. A match head formulation in accordance with any one of claims 1 to 3 which when in the form of a wet composition has a density in the range from 1. 1 to 1.4 g/CM3.
5. A match head formulation in accordance with any one of claims 1 to 4 wherein the proportion of potassium chlorate present is in the range from 40 to 60 percent dry weight and the red amorphous phosphorus is present in proportions between 0.01 to 9 percent dry weight.
6. A match head formulation in accordance with any of the preceding claims 2 to 5, characterised in that the iron citrate is provided in the form of ferrous citrate monohydrate.
7. A match head formulation in accordance with any of the preceding claims 2 to 5, characterised in that the iron citrate is provided in the form of Iron (111) citrate.
8. A match head formulation in accordance with any of the preceding claims 2 to 5, characterised in that the iron citrate is provided in the form of ammonium iron (111) citrate.
9. A match head formulated in accordance with any of the preceding claims 1 to 5, characterised in that the metal chelate complex is formed in situ by adding a chelate compound, such as potassium citrate, with a metal salt, such as iron Ill sulphate, said chelate compound and metal salt reacting together when added to the composition to form the desired metal chelate.
10. A match head formulation in accordance with claim 1, characterised in that the proportion of the metal complex of the match head composition is 0.01 % to 2.14 % by dry weight.
11. A match head formulation in accordance with claim 1, characterised in that the proportion of the metal complex of the match head composition is 0. 15 % to 1.5 % by dry weight.
12. A match head formulation in accordance with claim 1, characterised in that the proportion of iron citrate of the match head composition is 0.4 % to 0.9 % by dry weight.
13. A match head formulation in accordance with any of the preceding claims, characterised in that the proportion of iron citrate of the match head composition is 0.01 % to 2.14 % by dry weight.
14. A match head formulation in accordance with any of the preceding claims, characterised in that the proportion of iron citrate of the match head composition is 0. 15 % to 1.5 % by dry weight.
15. A match head formulation in accordance with any of the preceding claims, characterised in that the proportion of iron citrate of the match head composition is 0.4 % to 0.9 % by dry weight.
16. A match head formulation in accordance with any preceding claim wherein the binder is gelatine and is present in proportions ranging from 3 to 18 percent dry weight.
17. A match head formulation in accordance with any of claims 1 to 13 wherein the binder is animal glue.
18. A match head formulation in accordance with any preceding claim wherein the thickener is a starch and is present in proportions of up to 5 percent dry weight.
19. A match head formulation in accordance with any preceding claim wherein the filler is feldspar or another siliceous mineral.
20. A match head formulation in accordance with any preceding claim wherein the formulation also contains an ash improver.
21. A match head formulation in accordance with any preceding claim wherein the formulation also contains a pigment.
22. A match head formulation in accordance with any preceding claim wherein the formulation also contains a dithionite as a bleaching agent.
23. A match suitable for striking anywhere having a head coated in a formulation in accordance with any of claims 1 to 10.
24. A match head formulation in accordance with any of claims 3 to 13 wherein the foaming agent is Arylan PWS and is present in proportions of up to 0.2 percent dry weight.
25. A match head formulation in accordance with claim 10 wherein the ash improver is infusoria and is present in proportions of up to 6 percent dry weight.
26. A match head formulation in accordance with claim 10 wherein the ash improver is a cellulose flour such as olivestone flour and is present in proportions of up to 7 percent dry weight.
27. A match head formulation in accordance with claim 11 wherein the pigment is iron oxide and is present in proportions ranging from 3 to 10 percent dry weight.
28. A match head formulation according to claim 1, characterised in that it includes ferrophosphorus.
29. A match head formulation according to any preceding claim, characterised in that the particle size of the ferrophosphorus is between 1 and 200 microns.
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9612729A GB2314325B (en) | 1996-06-18 | 1996-06-18 | Match head formulations |
NO972399A NO308354B1 (en) | 1996-06-18 | 1997-05-27 | Match head formulation |
ES97303819T ES2166047T3 (en) | 1996-06-18 | 1997-06-04 | COMPOSITIONS FOR MATCH HEADS. |
PT97303819T PT814070E (en) | 1996-06-18 | 1997-06-04 | FORMULATIONS FOR PHOSPHORUS CAKES |
EP97303819A EP0814070B1 (en) | 1996-06-18 | 1997-06-04 | Match head formulations |
DE69707360T DE69707360T2 (en) | 1996-06-18 | 1997-06-04 | Compositions for match heads |
AT97303819T ATE207048T1 (en) | 1996-06-18 | 1997-06-04 | COMPOSITIONS FOR MATCH HEADS |
DK97303819T DK0814070T3 (en) | 1996-06-18 | 1997-06-04 | Match head coverings |
TR97/00489A TR199700489A2 (en) | 1996-06-18 | 1997-06-11 | Match head formulations. |
HU9701062A HUP9701062A3 (en) | 1996-06-18 | 1997-06-17 | Match head formulations |
PL97320604A PL184658B1 (en) | 1996-06-18 | 1997-06-17 | Incidentary composition for heads of matches |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9612729A GB2314325B (en) | 1996-06-18 | 1996-06-18 | Match head formulations |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9612729D0 GB9612729D0 (en) | 1996-08-21 |
GB2314325A true GB2314325A (en) | 1997-12-24 |
GB2314325B GB2314325B (en) | 2000-07-12 |
Family
ID=10795482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9612729A Expired - Fee Related GB2314325B (en) | 1996-06-18 | 1996-06-18 | Match head formulations |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0814070B1 (en) |
AT (1) | ATE207048T1 (en) |
DE (1) | DE69707360T2 (en) |
DK (1) | DK0814070T3 (en) |
ES (1) | ES2166047T3 (en) |
GB (1) | GB2314325B (en) |
HU (1) | HUP9701062A3 (en) |
NO (1) | NO308354B1 (en) |
PL (1) | PL184658B1 (en) |
PT (1) | PT814070E (en) |
TR (1) | TR199700489A2 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3492176A (en) * | 1968-09-11 | 1970-01-27 | T O Paine | Ammonium perchlorate composite propellant containing an organic transitional metal chelate catalytic additive |
US3923564A (en) * | 1971-06-22 | 1975-12-02 | Us Army | Double base propellant with thorium containing ballistic modifier |
GB2252312B (en) * | 1991-01-08 | 1995-02-08 | Bryant & May Ltd | Match head formulations |
-
1996
- 1996-06-18 GB GB9612729A patent/GB2314325B/en not_active Expired - Fee Related
-
1997
- 1997-05-27 NO NO972399A patent/NO308354B1/en not_active IP Right Cessation
- 1997-06-04 EP EP97303819A patent/EP0814070B1/en not_active Expired - Lifetime
- 1997-06-04 DK DK97303819T patent/DK0814070T3/en active
- 1997-06-04 ES ES97303819T patent/ES2166047T3/en not_active Expired - Lifetime
- 1997-06-04 PT PT97303819T patent/PT814070E/en unknown
- 1997-06-04 AT AT97303819T patent/ATE207048T1/en not_active IP Right Cessation
- 1997-06-04 DE DE69707360T patent/DE69707360T2/en not_active Expired - Fee Related
- 1997-06-11 TR TR97/00489A patent/TR199700489A2/en unknown
- 1997-06-17 HU HU9701062A patent/HUP9701062A3/en unknown
- 1997-06-17 PL PL97320604A patent/PL184658B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NO972399D0 (en) | 1997-05-27 |
EP0814070A1 (en) | 1997-12-29 |
PL184658B1 (en) | 2002-11-29 |
DK0814070T3 (en) | 2001-12-27 |
PL320604A1 (en) | 1997-12-22 |
TR199700489A2 (en) | 1998-01-21 |
EP0814070B1 (en) | 2001-10-17 |
ES2166047T3 (en) | 2002-04-01 |
GB9612729D0 (en) | 1996-08-21 |
ATE207048T1 (en) | 2001-11-15 |
NO308354B1 (en) | 2000-09-04 |
GB2314325B (en) | 2000-07-12 |
HUP9701062A3 (en) | 2002-02-28 |
HUP9701062A2 (en) | 1999-06-28 |
DE69707360D1 (en) | 2001-11-22 |
DE69707360T2 (en) | 2002-07-04 |
HU9701062D0 (en) | 1997-08-28 |
NO972399L (en) | 1997-12-19 |
PT814070E (en) | 2002-03-28 |
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Legal Events
Date | Code | Title | Description |
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PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20030618 |