NO131511B - - Google Patents
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- Publication number
- NO131511B NO131511B NO16678967A NO16678967A NO131511B NO 131511 B NO131511 B NO 131511B NO 16678967 A NO16678967 A NO 16678967A NO 16678967 A NO16678967 A NO 16678967A NO 131511 B NO131511 B NO 131511B
- Authority
- NO
- Norway
- Prior art keywords
- binder
- weight
- varnish
- styrene
- acid
- Prior art date
Links
- 239000011230 binding agent Substances 0.000 claims description 18
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 7
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 5
- 239000004922 lacquer Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 239000002966 varnish Substances 0.000 description 9
- 239000002253 acid Substances 0.000 description 7
- 239000010408 film Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 4
- 125000002015 acyclic group Chemical group 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- KMOUUZVZFBCRAM-OLQVQODUSA-N (3as,7ar)-3a,4,7,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1C=CC[C@@H]2C(=O)OC(=O)[C@@H]21 KMOUUZVZFBCRAM-OLQVQODUSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- JGFBRKRYDCGYKD-UHFFFAOYSA-N dibutyl(oxo)tin Chemical compound CCCC[Sn](=O)CCCC JGFBRKRYDCGYKD-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000005865 ionizing radiation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Description
Bestrålingsher&bart lakkbindemiddel på polyesterbasis.Irradiation-curable paint binder on a polyester basis.
I denne beskrivelse skal betegnelsen "lakk" omfatte både kombinasjonen av pigment og eventuelt fyllstoff i et bindemiddel og bindemidlet alene. Således kan bindemidlet som ved bestråling om- In this description, the term "varnish" shall include both the combination of pigment and any filler in a binder and the binder alone. Thus, the binder can, as with irradiation, re-
dannes til en holdbar film, være alt eller nesten alt hva som an-formed into a durable film, be everything or almost everything that an-
vendes til å danne filmen eller den kan være en bærer for pigment og partikkelformig fyllstoff. is turned to form the film or it can be a carrier for pigment and particulate filler.
Mange industriprodukter er bare akseptable på markedet når deMany industrial products are only acceptable on the market when they
er forsynt med glatt, skinnende, ensartet overtrekk. Typiske pro-is provided with a smooth, shiny, uniform coating. Typical pro-
dukter er biler, strukturelle og dekorative tre- og metallplater,ducts are automotive, structural and decorative wood and metal sheets,
osv. Overtrekning av slike gjenstander med en holdbar lakk av jevn dybde og karakter frembyr visse spesielle problemer, fordi overtrekk av relativt høy glans på glatte overflater forsyner slike overflater med et speillignende overtrekk. Slike overflater re- etc. Coating such objects with a durable varnish of uniform depth and character presents certain special problems, because relatively high gloss coatings on smooth surfaces provide such surfaces with a mirror-like coating. Such surfaces re-
flekterer lys på en slik måte at de fremhever og forsterker de forekommende uregelmessigheter. Et mønster av små uregelmessigheter som innenfor faget kalles "appelsinskalleffekten", kan frem-komme som resultat av lakksammensetningen eller herdningsprosessen, eller begge deler, og forminske gjenstandens markedsverdi. Ved overtrekning av tredimensjonale gjenstander skal lakken ha en til-strekkelig lav viskositet til å tillate hurtig påføring og til-strekkelig høy viskositet til at en film på 0,O25 mm vil henge fast på en loddrett flate uten å dryppe. Hvis bindemiddelingrediensene polymeriseres ved en relativt langsom prosess, som konvensjonell brenning, er bindemiddeloppløsningens sammensetning ikke funksjonelt begrenset i den grad som når herdningen er meget hurtig. Ved hurtig-herdningsprosesser under anvendelse av høyenergielektroner kan en glatt og jevn overflate ikke oppnåes dersom en eller flere kompo-nenter går tapt under polymerisasjon ved "avkokning". Dessuten utsettes mange gjenstander som krever slike overtrekk, for slit, skrapning, korrosjon osv., og derfor er sammensetningen av den poly-mer iserte film minst like viktig som dens utseende. bends light in such a way that they emphasize and reinforce the irregularities that occur. A pattern of small irregularities, known in the trade as the "orange peel effect", can appear as a result of the lacquer composition or the curing process, or both, and reduce the object's market value. When coating three-dimensional objects, the varnish should have a sufficiently low viscosity to allow rapid application and a sufficiently high viscosity that a film of 0.025 mm will adhere to a vertical surface without dripping. If the binder ingredients are polymerized by a relatively slow process, such as conventional firing, the composition of the binder solution is not functionally limited to the extent that when curing is very rapid. In rapid-curing processes using high-energy electrons, a smooth and even surface cannot be achieved if one or more components are lost during polymerization by "boiling off". Moreover, many objects that require such coatings are exposed to wear, scratching, corrosion, etc., and therefore the composition of the polymerized film is at least as important as its appearance.
Gjenstand for foreliggende oppfinnelse er et lakkbindemiddel som er egnet til å herdes ved bestråling med elektroner med energi mellom 120.000 og 500.000 eV, hvilket bindemiddel i alt vesentlig består av en oppløsning av en polyesterharpiks med molekylvekt mellom 2000 og 20.000 og med en umettethetsgrad som tilsvarer 0,5 - 3 alkeniske dobbeltbindinger pr. lOOO molekylvektenheter,karakterisert vedat det som oppløsningsmiddel inneholder en blanding av 30 - 70 vekt% styren og 70 - 30 vekt% methylmethacrylat. The object of the present invention is a varnish binder which is suitable for curing by irradiation with electrons with energy between 120,000 and 500,000 eV, which binder essentially consists of a solution of a polyester resin with a molecular weight between 2,000 and 20,000 and with a degree of unsaturation corresponding to 0 .5 - 3 alkenic double bonds per lOOO molecular weight units, characterized in that it contains as solvent a mixture of 30 - 70% by weight styrene and 70 - 30% by weight methyl methacrylate.
Fra US-PS nr. 3.247-012 er det kjent et lakkbindemiddel som tilsvarer bindemidlet ifølge oppfinnelsen, bortsett fra at det som oppløsningsmiddel bare inneholder styren. Overraskende nok har det nu vist seg at bindemidlet lettere lar seg herde med en lav bestrål-ingsdose dersom styrenet erstattes med den ovenfor angitte blanding av styren og methylmethacrylat. Tilsetningen av methylmethacrylat, From US-PS No. 3,247-012, a varnish binder is known which corresponds to the binder according to the invention, except that it only contains styrene as a solvent. Surprisingly, it has now been shown that the binder can be cured more easily with a low radiation dose if the styrene is replaced with the above-mentioned mixture of styrene and methyl methacrylate. The addition of methyl methacrylate,
i det minste i en andel av inntil 50% av den samlede monomervekt, forbedrer også lakkfilmens værbestandighet. at least in a proportion of up to 50% of the total monomer weight, also improves the weather resistance of the varnish film.
De foretrukne polyestere som anvendes i bindemidlet, fremstilles ved kondensasjon av en flerverdig alkohol, en acyclisk a-umettet a,p-dicarboxylsyre og en cyclisk, alifatisk dicarboxyl-syr-j. Det vil forståes at betegnelsen "syre" og "carboxylsyre" i denne forbindelse skal omfatte både syren som sådan og anhydridet derav, når et slikt eksisterer. Som eksempel på den acycliske syre kan nevnes maleinsyreanhydrid og som eksempel på den cycliske syre kan nevnes tet rahydrof thalsyreanhydr id". Ved en annen utførelses - form kan fthalsyreanhydrid anvendes istedenfor den cycliske, ali-fatiske dicarboxylsyre , eftersom a , (3-alken-umettethetene' leveres av den acycliske syre. Lakk som er fremstilt med fthalsyreanhydrid og herdet ved ioniserende bestråling, er imidlertid mindre mot-standsdyktig overfor værets påvirkning. The preferred polyesters used in the binder are produced by condensation of a polyhydric alcohol, an acyclic α-unsaturated α,β-dicarboxylic acid and a cyclic, aliphatic dicarboxylic acid. It will be understood that the terms "acid" and "carboxylic acid" in this connection shall include both the acid as such and the anhydride thereof, when such exists. As an example of the acyclic acid, maleic anhydride can be mentioned and as an example of the cyclic acid, tetrahydrophthalic anhydride can be mentioned". In another embodiment, phthalic anhydride can be used instead of the cyclic, aliphatic dicarboxylic acid, since a, (3-alkene- the unsaturations' are provided by the acyclic acid Lacquers prepared with phthalic anhydride and cured by ionizing radiation are, however, less resistant to the effects of the weather.
Bindemidlet inneholder som oppløsningsmiddel ca. 15 - 6o vekt%, og fortrinnsvis 25 - 50 vekt% av den nevnte monomerblanding. The binder contains as a solvent approx. 15 - 60% by weight, and preferably 25 - 50% by weight of the mentioned monomer mixture.
Lakk på basis av bindemidlet ifølge oppfinnelsen kan påføres som en tynn film, dvs. med en gjennomsnittstykkelse på 0,01 - 0,1 mm, ved konvensjonelle metoder, som pensling, neddypping eller sprøyting, og herdes ved relativt lave temperaturer, dvs. mellom værelsetem-peratur og den temperatur ved hvilken der forekommer betydelig for-dampning av væskens mest flyktige bestanddel. Varnish based on the binder according to the invention can be applied as a thin film, i.e. with an average thickness of 0.01 - 0.1 mm, by conventional methods, such as brushing, dipping or spraying, and cured at relatively low temperatures, i.e. between room temperature and the temperature at which significant evaporation of the liquid's most volatile component occurs.
Oppfinnelsen belyses nærmere ved de følgende eksempler. Betegnelsen "Rad" heri betegner den strålingsdose som resulterer i absorpsjon av 100 erg energi pr. g absorberende materiale, dvs. lakkf ilm. The invention is illustrated in more detail by the following examples. The designation "Rad" herein denotes the radiation dose that results in the absorption of 100 erg of energy per g absorbent material, i.e. varnish film.
EksempelExample
Der fremstilles et lakkbindemiddel av de nedenfor angitte materialer på den måte som forklares i det følgende: I en reaksjonsbeholder innføres 6,7 kg maleinsyreanhydrid, 32,8 kg tetrahydrofthalsyreanhydrid, 34,0 kg neopentylglycol og 113,0 g dibutyltinnoxyd. Chargen oppvarmes til 171°C og holdes ved denne temperatur i 1 time.Derpå heves chargens temperatur til 227°C, og den holdes ved denne temperatur inntil syretallet av den dannede harpiks er under ca. 20.Overskuddet av glycol og vann fjernes i vakuum, og når syretallet er under ca. IO, tilsettes A lacquer binder is prepared from the materials listed below in the manner explained below: 6.7 kg of maleic anhydride, 32.8 kg of tetrahydrophthalic anhydride, 34.0 kg of neopentyl glycol and 113.0 g of dibutyltin oxide are introduced into a reaction vessel. The charge is heated to 171°C and held at this temperature for 1 hour. The charge's temperature is then raised to 227°C, and it is held at this temperature until the acid number of the formed resin is below approx. 20. The excess of glycol and water is removed in a vacuum, and when the acid number is below approx. IO, is added
14,5 g hydrokinon.Chargen får lov til å avkjøles til ca. 82°C,14.5 g hydroquinone. The charge is allowed to cool to approx. 82°C,
og der tilsettes 16,8 kg styren. En bindemiddeloppløsning fremstilles ved anvendelse av 50vektdeler av dette materiale, and 16.8 kg of styrene is added there. A binder solution is prepared using 50 parts by weight of this material,
25 vektdeler styren og 25 vektdeler methylmethacrylat.25 parts by weight styrene and 25 parts by weight methyl methacrylate.
Denne oppløsning sprøytes på 10 x 32 cm plater av tre og metall. Der fremstilles filmer med en gjennomsnittstykkelse på This solution is sprayed on 10 x 32 cm boards made of wood and metal. Films with an average thickness of
25, 38 og 51 mikron, og lakken herdes derpå ved å rette en elek-tronstråle med en energi på ca. 260.OOOeV mot den overtrukne flate, 25, 38 and 51 microns, and the varnish is then hardened by directing an electron beam with an energy of approx. 260.OOOeV towards the coated surface,
idet vinduet i den elektronstrålende innretning befinner seg i en avstand av ca. 7,6 cm fra den overtrukne flate. Overtrekket utsettes for elektronstrålen inntil der er overført en totaldose på ca. 10 megarad. as the window in the electron-radiating device is located at a distance of approx. 7.6 cm from the coated surface. The cover is exposed to the electron beam until a total dose of approx. 10 megarad.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO16678967A NO131511C (en) | 1967-02-10 | 1967-02-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO16678967A NO131511C (en) | 1967-02-10 | 1967-02-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO131511B true NO131511B (en) | 1975-03-03 |
NO131511C NO131511C (en) | 1975-06-11 |
Family
ID=19909927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO16678967A NO131511C (en) | 1967-02-10 | 1967-02-10 |
Country Status (1)
Country | Link |
---|---|
NO (1) | NO131511C (en) |
-
1967
- 1967-02-10 NO NO16678967A patent/NO131511C/no unknown
Also Published As
Publication number | Publication date |
---|---|
NO131511C (en) | 1975-06-11 |
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