RO111278B - Colorless fireproofing product for the wood obtaining at fire and preparation process thereof - Google Patents
Colorless fireproofing product for the wood obtaining at fire and preparation process thereof Download PDFInfo
- Publication number
- RO111278B RO111278B RO9401299A RO9401299A RO111278B RO 111278 B RO111278 B RO 111278B RO 9401299 A RO9401299 A RO 9401299A RO 9401299 A RO9401299 A RO 9401299A RO 111278 B RO111278 B RO 111278B
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- RO
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- Prior art keywords
- sodium
- colorless
- product
- wood
- urea
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- 239000002023 wood Substances 0.000 title abstract description 18
- 238000002360 preparation method Methods 0.000 title abstract 2
- 238000004079 fireproofing Methods 0.000 title 1
- 239000003063 flame retardant Substances 0.000 claims abstract description 18
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 17
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004254 Ammonium phosphate Substances 0.000 claims abstract description 8
- 229910000148 ammonium phosphate Inorganic materials 0.000 claims abstract description 8
- 235000019289 ammonium phosphates Nutrition 0.000 claims abstract description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 7
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 7
- 239000011734 sodium Substances 0.000 claims abstract description 7
- 229920001807 Urea-formaldehyde Polymers 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000001488 sodium phosphate Substances 0.000 claims abstract description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims abstract description 5
- 235000015424 sodium Nutrition 0.000 claims abstract description 3
- 229910000162 sodium phosphate Inorganic materials 0.000 claims abstract 3
- 150000001875 compounds Chemical class 0.000 claims abstract 2
- 235000011008 sodium phosphates Nutrition 0.000 claims abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000004115 Sodium Silicate Substances 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000004202 carbamide Substances 0.000 claims description 5
- 235000013877 carbamide Nutrition 0.000 claims description 5
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 150000003388 sodium compounds Chemical class 0.000 claims 2
- 238000002156 mixing Methods 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 3
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 abstract description 2
- 239000011230 binding agent Substances 0.000 abstract description 2
- 230000001680 brushing effect Effects 0.000 abstract description 2
- 238000000265 homogenisation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 1
- 239000007900 aqueous suspension Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 5
- 239000003973 paint Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 2
- 235000019801 trisodium phosphate Nutrition 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
- 240000002791 Brassica napus Species 0.000 description 1
- 235000004977 Brassica sinapistrum Nutrition 0.000 description 1
- 239000005696 Diammonium phosphate Substances 0.000 description 1
- 102000020897 Formins Human genes 0.000 description 1
- 108091022623 Formins Proteins 0.000 description 1
- 244000020551 Helianthus annuus Species 0.000 description 1
- 235000003222 Helianthus annuus Nutrition 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical compound [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 1
- 235000019838 diammonium phosphate Nutrition 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 229960004279 formaldehyde Drugs 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- YSRVJVDFHZYRPA-UHFFFAOYSA-N melem Chemical compound NC1=NC(N23)=NC(N)=NC2=NC(N)=NC3=N1 YSRVJVDFHZYRPA-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Fireproofing Substances (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Invenția se referă la un produs ignifug, incolor, pentru protecția, la foc, a lemnului și procedeu de obținere a acestuia. Produsul ignifug, conform invenției, este o suspensie apoasă, constituită din lianți peliculogeni, ca silicatul de sodiu și rășina ureo-formaldehidică și componenți activi, aleși dintre fosfat de sodiu, fosfat de amoniu și sodiu, fosfat de amoniu. Produsul ignifug, conform invenției, se obține prin amestecare și omogenizare, într-un malaxor, introducând componentele într-o ordine bine stabilită, la temperatură și presiune normală. Produsul conform invenției se aplică pe lemn și pe materiale pe bază de lemn, prin procedee de acoperire uzuale și anume, prin pensulare sau pulverizare. Revendicări: 4The invention relates to a product fireproof, colorless, for the fire protection of wood and a process for the preparation thereof. The product fire retardant according to the invention is an aqueous suspension, consisting of film-forming binders, such as silicate sodium and urea-formaldehyde resin and components active compounds selected from sodium phosphate, ammonium phosphate and sodium, ammonium phosphate. The flame retardant product, according to the invention, is obtained by mixing and homogenization, in a mixer, introducing components in a well-established order at temperature and normal pressure. The product conforms the invention is applied on wood and on base materials wood, by customary coating processes brushing or spraying. Claims: 4
Description
Prezenta invenție se referă la un produs ignifug, incolor, pentru protecția la foc a lemnului și la un procedeu de obținere a acestuia, destinat realizării unor acoperiri de protecție. 5The present invention relates to a colorless flame retardant product for the protection against fire of wood and to a process for obtaining it, intended to make protective coatings. 5
Acoperirile ignifuge constituie unul dintre mijloacele pentru mărirea rezistenței la foc a construcțiilor din lemn sau a produselor din lemn.Flame retardant coatings are one of the means for increasing the fire resistance of wood constructions or wood products.
Sunt cunoscute diferite tipuri de 10 produse ignifuge și vopsele pentru termoprotecția lemnului și a produselor din lemn, în compoziția cărora intră o gamă largă de substanțe organice sau anorganice, care acționează prin mecanisme 15 diferite, în funcție de natura lor chimică.Different types of 10 flame retardant products and paints for the thermoprotection of wood and wood products are known, the composition of which includes a wide range of organic or inorganic substances, which act by 15 different mechanisms, depending on their chemical nature.
In scopul grunduirii și acoperirii suprafețelor de metal și lemn, este cunoscută o compoziție ignifugă constituită din 6,6 ... 22 părți rășină metilolpo- 20 liamidică, 7,4 ... 17,5 părți rășină uscată ureo-formaldehidică, 3,5 ... 10 părți fosfat de diamoniu, 2,2 ... 5,6 părți diciandiamidă, 0,8 ... 2,5 părți silicat de etil, 8,5 ... 21 părți melem (2,6,10-tri- 25 amino-sim-heptazină], O ... 13,0 părți rășină melaminoformaldehidică, O ... 5,0 părți fibre de sticlă, O ... 20 părți alcool butilic, O ... 20,5 părți rășină ureoformaldehidică, O ... 31,5 părți alcool etilic și 30 O ... 31,5 părți apă, părțile fiind exprimate în greutate [RO 62410].For the purpose of priming and coating the metal and wood surfaces, a flame retardant composition consisting of 6.6 ... 22 parts methylolpo-20 liamide resin, 7.4 ... 17.5 parts dry urea-formaldehyde resin, 3, is known. 5 ... 10 parts diammonium phosphate, 2.2 ... 5.6 parts dicyandiamide, 0.8 ... 2.5 parts ethyl silicate, 8.5 ... 21 parts melem (2.6, 10-tri- 25 amino-sim-heptazine], O ... 13.0 parts melaminoformaldehyde resin, O ... 5.0 parts glass fiber, O ... 20 parts butyl alcohol, O ... 20, 5 parts ureoformaldehyde resin, O ... 31.5 parts ethyl alcohol and 30 O ... 31.5 parts water, parts being expressed by weight [RO 62410].
Se cunoaște de asemenea o vopsea ignifugă pentru protecția la foc a lemnului, constituită din lianți pelicu- 35 logeni, alcătuită din 44 ... 50 % silicat de sodiu, 2 ... 10 % ulei vegetal fiert, ales dintre ulei de in, floarea soarelui, rapiță, 5 ... 28 % materiale termorefractare, alese dintre alumină, talc, cretă, 40 diațomită, zeolit, cenușă de termocentrală, zgură de furnal, 5 ... 15 % componenți activi, cu conținut de fosfor și azot, aleși dintre fosfat de amoniu, fosfat de amoniu și sodiu, carbamidă 45 fosforată, procentele fiind exprimate în greutate [RO 108873].It is also known as a flame retardant paint for the fire protection of wood, consisting of 35-film pellicle binders, consisting of 44 ... 50% sodium silicate, 2 ... 10% boiled vegetable oil, chosen from linseed oil, sunflower, rapeseed, 5 ... 28% thermorefraction materials, chosen from alumina, talc, chalk, 40 diatomite, zeolite, ash from the power plant, blast furnace slag, 5 ... 15% active components, containing phosphorus and nitrogen , selected from ammonium phosphate, ammonium phosphate and sodium, phosphorous carbamide 45, the percentages being expressed by weight [RO 108873].
Vopseaua ignifugă menționată este obținută prin omogenizarea silicatului de sodiu cu hidroxid de sodiu timp 50 de 5 min, după care se adaugă sub agitare, uleiul vegetal și se omogenizează min, apoi se adaugă, succesiv, sub agitare continuă, componentele active, termorefractare și apa și se omogenizează continuu.Said flame retardant paint is obtained by homogenization of sodium silicate with sodium hydroxide for 50 5 minutes, after which the vegetable oil is added and stirred and the mixture is homogenized for min, and then, successively, under continuous stirring, the active components, thermorefraction and water are added. and is constantly homogenized.
Prezenta invenție lărgește gama produselor ignifuge pentru lemn, fiind constituită din 45 ... 65 % silicat de sodiu, 5 ... 15 % complex ureoformaldehidic, 2 ... 6 % componenți activi cu conținut de fosfor și azot, aleși dintre fosfat de amoniu, fosfat diamoniacal, fosfat trisodic, carbamidă fosfatată, carbodiimidă și 30 ... 50 % apă.The present invention extends the range of flame retardant wood products, consisting of 45 ... 65% sodium silicate, 5 ... 15% ureoformaldehyde complex, 2 ... 6% active components containing phosphorus and nitrogen, selected from phosphate ammonium, diamoniacal phosphate, trisodium phosphate, phosphated carbamide, carbodiimide and 30 ... 50% water.
Produsul ignifug, conform invenției, se obține printr-un procedeu care constă în omogenizarea, timp de 5 ... 10 min, a silicatului de sodiu cu apă, după care se adaugă complexul ureoformaldehidic, continuând amestecarea încă 1 □ min, urmată de adăugarea componentelor cu fosfor, sodiu sau azot, obținându-se produsul finit sub forma unei suspensii.The flame retardant product according to the invention is obtained by a process consisting of homogenizing, for 5 to 10 minutes, the sodium silicate with water, after which the ureoformaldehyde complex is added, further mixing for 1 □ min, followed by the addition components with phosphorus, sodium or nitrogen, the finished product being obtained as a suspension.
Invenția prezintă următoarele avantaje:The invention has the following advantages:
- produsul fiind incolor păstrează structura naturală a lemnului;- the product being colorless, preserves the natural structure of the wood;
- produsul se realizează din materii prime accesibile;- the product is made from accessible raw materials;
- tehnologia de aplicare a produsului ignifug este simplă, ieftină și eficientă;- the technology of application of the flame retardant product is simple, cheap and efficient;
- termoprotecția lemnului și a produselor din lemn se realizează cu un consum specific redus cu 75 %, obținându-se rezultate similare cu ale produselor existente de același tip.- the thermoprotection of wood and wood products is achieved with a specific consumption reduced by 75%, obtaining results similar to those of existing products of the same type.
Produsul ignifug, incolor, conform invenției, poate fi utilizat și pentru exterior, în cazul în care peste acest produs ignifug se aplică lacuri incolore rezistente la contactul cu apa sau prin amestecarea cu diverși pigmenți sau coloranți, se pot obține produse sau vopsele în cele mai variate culori sau nuanțe.The colorless flame retardant product according to the invention can also be used for the exterior, where colorless varnishes resistant to contact with water or by mixing with various pigments or dyes can be applied over this flame retardant product or paints can be obtained in the most various colors or shades.
Se dau, în continuare, 2 exemple de realizare a invenției.The following are two examples of embodiment of the invention.
Exemplul 1. Formularea conform exemplului 1 se realizează prin amestecarea la temperatură și presiune normală a următoarelor componente: 60 kg silicat de sodiu, 10 kg complex ureoRO 111278 Β formaldehidic, 5 kg fosfat trisodic și 25 kg apă.Example 1. The formulation according to example 1 is carried out by mixing at normal temperature and pressure the following components: 60 kg sodium silicate, 10 kg ureaRO 111278 complex Β formaldehyde, 5 kg trisodium phosphate and 25 kg water.
Se obține un lichid omogen, incolor, care prin aplicare dă posibilitatea păstrării structurii naturale a lemnului. 5A homogeneous, colorless liquid is obtained, which by application gives the possibility of preserving the natural structure of the wood. 5
Exemplul 2. Formularea conform exemplului 2 se realizează prin amestecarea la temperatură și presiune normală a următoarelor componente: 55 kg silicat de sodiu, 5 kg complex ureo- io formaldehidic, 5 kg fosfat diamoniacal, 5 kg diciandiamidă și 3 kg apă.Example 2. The formulation according to example 2 is carried out by mixing at normal temperature and pressure the following components: 55 kg of sodium silicate, 5 kg of urea and formaldehyde complex, 5 kg of diamoniacal phosphate, 5 kg of diciandiamide and 3 kg of water.
Se obține un lichid omogen, incolor, care prin aplicare dă posibilitatea vizionării structurii naturale a lemnului. 15A homogeneous, colorless liquid is obtained, which by application gives the possibility of viewing the natural structure of the wood. 15
Procedeul de obținere a produsului ignifug, incolor, conform invenției, constă în amestecarea și omogenizarea componentelor, în următoarea ordine: silicat de sodiu, apă, complexul ureo-form- 20 aldehidic, componetele care conțin fosfor și azot și din nou apă, în utilaje tip amestecător, la temperatură și presiune normală.The process of obtaining the colorless flame retardant product according to the invention consists in mixing and homogenizing the components, in the following order: sodium silicate, water, urea-form-aldehyde complex, phosphorus and nitrogen compounds and again water, in machinery. mixing type, at normal temperature and pressure.
Produsul obținut se aplică prin 25 procedeele tradiționale de tratament de suprafață și anume, pensulare sau pulverizare.The product obtained is applied through 25 traditional surface treatment procedures, namely, brushing or spraying.
Produsul ignifug, incolor, elaborat și testat experimental în cadrul labora- 30 toarelor de specialitate, abilitate în acest scop, pe diferite suporturi și produse din lemn, a confirmat încadrarea în cerințele stabilite de normativele în vigoare, din țară și străinătate. 35The flame retardant product, colorless, elaborated and tested experimentally in the 30 specialized laboratories, authorized for this purpose, on different substrates and wood products, confirmed the compliance with the requirements established by the regulations in force, in the country and abroad. 35
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO9401299A RO111278B (en) | 1994-08-01 | 1994-08-01 | Colorless fireproofing product for the wood obtaining at fire and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO9401299A RO111278B (en) | 1994-08-01 | 1994-08-01 | Colorless fireproofing product for the wood obtaining at fire and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RO111278B true RO111278B (en) | 1996-08-30 |
Family
ID=20100996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO9401299A RO111278B (en) | 1994-08-01 | 1994-08-01 | Colorless fireproofing product for the wood obtaining at fire and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO111278B (en) |
-
1994
- 1994-08-01 RO RO9401299A patent/RO111278B/en unknown
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