NO781714L - DENTAL SHAPE BODIES. - Google Patents
DENTAL SHAPE BODIES.Info
- Publication number
- NO781714L NO781714L NO78781714A NO781714A NO781714L NO 781714 L NO781714 L NO 781714L NO 78781714 A NO78781714 A NO 78781714A NO 781714 A NO781714 A NO 781714A NO 781714 L NO781714 L NO 781714L
- Authority
- NO
- Norway
- Prior art keywords
- dental
- powder
- polymethacrylates
- polyurethane
- elastified
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 33
- 239000011324 bead Substances 0.000 claims description 25
- 239000004814 polyurethane Substances 0.000 claims description 24
- 229920002635 polyurethane Polymers 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 17
- 229920000193 polymethacrylate Polymers 0.000 claims description 16
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 14
- 229920000642 polymer Polymers 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000010557 suspension polymerization reaction Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 206010041662 Splinter Diseases 0.000 claims description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 claims description 2
- 230000008439 repair process Effects 0.000 claims description 2
- 229920002319 Poly(methyl acrylate) Polymers 0.000 claims 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 21
- 238000012360 testing method Methods 0.000 description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 10
- 229920000728 polyester Polymers 0.000 description 10
- 239000005058 Isophorone diisocyanate Substances 0.000 description 8
- 125000005442 diisocyanate group Chemical group 0.000 description 8
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- -1 aliphatic azo compound Chemical class 0.000 description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- 150000002978 peroxides Chemical class 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 5
- 235000019400 benzoyl peroxide Nutrition 0.000 description 5
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 description 4
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 4
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 229920000457 chlorinated polyvinyl chloride Polymers 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 150000002009 diols Chemical class 0.000 description 3
- 239000011049 pearl Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- HSOOIVBINKDISP-UHFFFAOYSA-N 1-(2-methylprop-2-enoyloxy)butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(CCC)OC(=O)C(C)=C HSOOIVBINKDISP-UHFFFAOYSA-N 0.000 description 2
- HWSSEYVMGDIFMH-UHFFFAOYSA-N 2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOC(=O)C(C)=C HWSSEYVMGDIFMH-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004970 Chain extender Substances 0.000 description 2
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- AMFGWXWBFGVCKG-UHFFFAOYSA-N Panavia opaque Chemical compound C1=CC(OCC(O)COC(=O)C(=C)C)=CC=C1C(C)(C)C1=CC=C(OCC(O)COC(=O)C(C)=C)C=C1 AMFGWXWBFGVCKG-UHFFFAOYSA-N 0.000 description 2
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000001361 adipic acid Substances 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000003505 polymerization initiator Substances 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- JMYZLRSSLFFUQN-UHFFFAOYSA-N (2-chlorobenzoyl) 2-chlorobenzenecarboperoxoate Chemical compound ClC1=CC=CC=C1C(=O)OOC(=O)C1=CC=CC=C1Cl JMYZLRSSLFFUQN-UHFFFAOYSA-N 0.000 description 1
- CDMDQYCEEKCBGR-UHFFFAOYSA-N 1,4-diisocyanatocyclohexane Chemical compound O=C=NC1CCC(N=C=O)CC1 CDMDQYCEEKCBGR-UHFFFAOYSA-N 0.000 description 1
- FYBFGAFWCBMEDG-UHFFFAOYSA-N 1-[3,5-di(prop-2-enoyl)-1,3,5-triazinan-1-yl]prop-2-en-1-one Chemical compound C=CC(=O)N1CN(C(=O)C=C)CN(C(=O)C=C)C1 FYBFGAFWCBMEDG-UHFFFAOYSA-N 0.000 description 1
- LGJCFVYMIJLQJO-UHFFFAOYSA-N 1-dodecylperoxydodecane Chemical compound CCCCCCCCCCCCOOCCCCCCCCCCCC LGJCFVYMIJLQJO-UHFFFAOYSA-N 0.000 description 1
- YXZQSMBYXJWRSP-UHFFFAOYSA-N 1-methylcyclohexane-1,4-diol Chemical compound CC1(O)CCC(O)CC1 YXZQSMBYXJWRSP-UHFFFAOYSA-N 0.000 description 1
- CDULGHZNHURECF-UHFFFAOYSA-N 2,3-dimethylaniline 2,4-dimethylaniline 2,5-dimethylaniline 2,6-dimethylaniline 3,4-dimethylaniline 3,5-dimethylaniline Chemical class CC1=CC=C(N)C(C)=C1.CC1=CC=C(C)C(N)=C1.CC1=CC(C)=CC(N)=C1.CC1=CC=C(N)C=C1C.CC1=CC=CC(N)=C1C.CC1=CC=CC(C)=C1N CDULGHZNHURECF-UHFFFAOYSA-N 0.000 description 1
- QWGRWMMWNDWRQN-UHFFFAOYSA-N 2-methylpropane-1,3-diol Chemical compound OCC(C)CO QWGRWMMWNDWRQN-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- 239000004801 Chlorinated PVC Substances 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N Tetraethylene glycol, Natural products OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001448 anilines Chemical class 0.000 description 1
- 229940125717 barbiturate Drugs 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- XXKOQQBKBHUATC-UHFFFAOYSA-N cyclohexylmethylcyclohexane Chemical compound C1CCCCC1CC1CCCCC1 XXKOQQBKBHUATC-UHFFFAOYSA-N 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000012933 diacyl peroxide Substances 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 125000001261 isocyanato group Chemical group *N=C=O 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- ZIOFXYGGAJKWHX-UHFFFAOYSA-N n,2,4-trimethylaniline Chemical compound CNC1=CC=C(C)C=C1C ZIOFXYGGAJKWHX-UHFFFAOYSA-N 0.000 description 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920003226 polyurethane urea Polymers 0.000 description 1
- 239000007870 radical polymerization initiator Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- MWNQXXOSWHCCOZ-UHFFFAOYSA-L sodium;oxido carbonate Chemical compound [Na+].[O-]OC([O-])=O MWNQXXOSWHCCOZ-UHFFFAOYSA-L 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- BUUPQKDIAURBJP-UHFFFAOYSA-N sulfinic acid Chemical compound OS=O BUUPQKDIAURBJP-UHFFFAOYSA-N 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- BWSZXUOMATYHHI-UHFFFAOYSA-N tert-butyl octaneperoxoate Chemical compound CCCCCCCC(=O)OOC(C)(C)C BWSZXUOMATYHHI-UHFFFAOYSA-N 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- 150000004992 toluidines Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/067—Polyurethanes; Polyureas
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/891—Compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- A61K6/893—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
Description
DentalformlegemerDental molds
Oppfinnelsens gjenstand er dentalformlegemer.som proteser, kroner eller broer med forbedrede mekaniske egenskaper. The object of the invention is dental moldings such as prostheses, crowns or bridges with improved mechanical properties.
Tannproteser av kunststoff fremstilles i de fleste tilfeller etter pulver-væske fremgangsmåten (tysk patent 737-058). Dental prostheses made of plastic are produced in most cases according to the powder-liquid method (German patent 737-058).
Ved denne arbeidsmåte forarbeides et perlepolymerisat på basis av polymetakrylater med metakrylater som f.eks. metylmetakrylat til en deig idet man utrører 2 til 3 deler pulver med 1 del væske. Den monomere er før deigfremstillingen blitt lammet med peroksyd således at deigen etter ifylling i en hulform med oppvarming kan herdne under polymerisasjon av den monomere. In this way of working, a pearl polymer based on polymethacrylates is processed with methacrylates such as e.g. methyl methacrylate to a paste by mixing 2 to 3 parts powder with 1 part liquid. Before the dough is made, the monomer has been paralyzed with peroxide so that the dough, after being filled in a hollow mold with heating, can harden during polymerization of the monomer.
Den lette gjennomførbarhet av fremstillingsfremgangs-måten for tannproteser, kroner og broer bevirker at pulver-væske fremgangsmåten er blitt standardteknikk.. ved fremstilling av kunststofftannproteser. Det er videre kjent å forbedre for-arbeidbarheten av dentalperler ved pulver-væske fremgangsmåten ved at man anvender polymetylmetakrylatpulver eller fortrinnsvis polymetylmetakrylatperler av en definert kornstørrelse og det er dessuten kjent å forbedre forarbeidelsesbredden av dentalperler ved at man ikke anvender polymetylmetakrylatperler, men perler av kopolymerisater av metylmetakrylat med overveiende mengde av kopolymerisert metakrylsyremetylester som pulver. Ved denne variasjon lykkes det å innstille den ønskede hurtige forarbeidbarhet ved den eventuelt ønskede store forarbeidelsesbredde. The easy practicability of the manufacturing process for dental prostheses, crowns and bridges means that the powder-liquid method has become the standard technique... for the production of synthetic dental prostheses. It is further known to improve the processability of dental beads by the powder-liquid method by using polymethyl methacrylate powder or preferably polymethyl methacrylate beads of a defined grain size and it is also known to improve the processing width of dental beads by not using polymethyl methacrylate beads, but beads of copolymers of methyl methacrylate with a predominant amount of copolymerized methacrylic acid methyl ester as powder. With this variation, it is possible to set the desired rapid processability with the possibly desired large processing width.
Uheldig fordi fra det pulver-væske fremgangsmåten på basis av polymetylmetakrylatet fremstilte tannproteser, kroner og broer er det at de mekaniske verdier av råstoffet ikke er tilfredsstillende for mange konstruksjoner. Spesielt er seig-heten av akrylstoffene ikke tilstrekkelig ved belastninger i mange tilfeller for proteser, kroner og broer. En forbedring av kunststoffets slajgseighet ville bevirke at protesenes brudd-tendens ble mindre og at også renselsesprosessen kan gjennom-føres sikrere. Unfortunate because dental prostheses, crowns and bridges produced from the powder-liquid method on the basis of polymethyl methacrylate are that the mechanical values of the raw material are not satisfactory for many constructions. In particular, the toughness of the acrylic materials is not sufficient for loads in many cases for prostheses, crowns and bridges. An improvement in the impact resistance of the plastic would mean that the tendency of the dentures to break was reduced and that the cleaning process could also be carried out more safely.
Det er funnet at etter pulver-væske fremgangsmåten fremstilte dentalformlegemer som proteser, broer og kroner på basis av polymetakrylater har forbedrede mekaniske egenskaper når man som pulver anvender eller medanvender polymetylmetakrylater som er blitt elastifisert med polyuretaner. It has been found that dental molds such as prostheses, bridges and crowns produced using the powder-liquid method on the basis of polymethacrylates have improved mechanical properties when polymethyl methacrylates which have been elastised with polyurethanes are used as powder or together.
Dette gjelder også for på denne måte fremstilte kunstige tenner. Også som komponenter for reparasjonsmateriale for tann-protesebroer og kroner er de med polyuretaner elastifiserte polymetylmetakrylater egnet. This also applies to artificial teeth produced in this way. Polymethyl methacrylates elasticized with polyurethanes are also suitable as components for repair material for dental prosthetic bridges and crowns.
Det er kjent å elastifisere polymetylmetakrylater vedIt is known to elastify polymethyl methacrylates by
at man gjennomfører polymerisasjonen av metylmetakrylatet etter fremgangsmåten for en massepolymerisasjon ved samtidig formgivning. Det var imidlertid ikke å vente at man kan få proteser med forbedrede egenskaper når man arbeider etter pulver-væske fremgangsmåten og som pulver anvender et polymetylmetakrylat som som elastifiserende komponent inneholder et polyuretan. Slik det er generelt kjent, er dentalkunststoffer som fås etter pulver-væske fremgangsmåtenkarakterisert veden spesiell oppbygning. Idet det utherdede kunststoffet fore-ligger påvisbart ved spesielle metoder et flerfaset system: Den opprinnelige "væske" er ved svelleprosessen bare delvis trengt inn i pulverpartiklene. En stor om ikke overveiende del av væsken polymeriseres som fase for seg og fyller mellom-rommet ut mellom de svellede opprinnelige pulverpartikler. Pormlegemer av polymetakrylater eller modifiserte polymetylmetakrylater som er blitt dannet etter pulver-væske fremgangsmåten adskiller seg i oppbygningen dermed vesentlig fra formlegemer av polymetylmetakrylater som er blitt dannet over vanlige formgivningsfremgangsmåter. that the polymerization of the methyl methacrylate is carried out according to the procedure for mass polymerization by simultaneous shaping. However, it was not to be expected that prostheses with improved properties can be obtained when working according to the powder-liquid method and using as powder a polymethyl methacrylate which contains a polyurethane as an elasticizing component. As is generally known, dental plastics obtained by the powder-liquid process are characterized by a special structure. As the cured plastic is demonstrably present by special methods, a multiphase system: The original "liquid" has only partially penetrated the powder particles during the swelling process. A large, if not predominant, part of the liquid is polymerized as a separate phase and fills the space between the swollen original powder particles. Form bodies of polymethacrylates or modified polymethyl methacrylates that have been formed using the powder-liquid method thus differ significantly in structure from form bodies of polymethyl methacrylates that have been formed via normal shaping methods.
Fra tysk patent 9^0.493 er det riktig nok kjent også å forbedre de mekaniske verdier av formlegemer av metylmetakry-later idet man anvender blandinger av forskjellige polymerisater eller kopolymerisafeer som pulverkomponenter. Til forbed ring av permanentbøyefastheten ble det eksempelvis anvendt blandingspolymerisater av Q0% metylmetakrylat og 20% butadien. Slike kopolymerisater har imidlertid på grunn av butadieninn-holdet en dårlig lysekthet. From German patent 9^0.493 it is indeed known to improve the mechanical values of moldings of methyl methacrylates by using mixtures of different polymers or copolymers as powder components. To improve the permanent bending strength, mixed polymers of Q0% methyl methacrylate and 20% butadiene were used, for example. However, due to the butadiene content, such copolymers have poor light fastness.
Videre er det fra tysk patent 940.493 kjent å anvende etterklorert polyvinylklorid som tilsetning for å forbedre slagbøyefastheten og permanentbøyefastheten av formlegemet på basis av metylmetakrylatpolymerisater som er blitt dannet etter pulver-væske fremgangsmåten. Etterklorerte polyvinylklorider som tilsetning bevirker imidlertid en nedgang i miss-fargingsbestandigheten. Dessuten er ved anvendelse av aktive peroksyder eller høyere polymerisasjonstemperaturer stabili-teten av etterklorerte polyvinylklorider ikke tilstrekkelig. Furthermore, it is known from German patent 940,493 to use post-chlorinated polyvinyl chloride as an additive to improve the impact bending strength and the permanent bending strength of the molded body on the basis of methyl methacrylate polymers which have been formed according to the powder-liquid method. Post-chlorinated polyvinyl chlorides as an additive, however, cause a decrease in the miss-dyeing resistance. Furthermore, when using active peroxides or higher polymerization temperatures, the stability of post-chlorinated polyvinyl chlorides is not sufficient.
Pormlegemer for dentalformål som tannproteser, broer eller kroner på basis av organiske kunststoffer kan fremstilles etter forskjellige fremgangsmåter. Porm bodies for dental purposes such as dental prostheses, bridges or crowns based on organic plastics can be produced using different methods.
Således kan eksempelvis kunststoff over en sprøyte- eller ekstrusjonsfremgangsmåte dannes i det ønskede formlegeme. Thus, for example, plastic can be formed into the desired molded body via an injection or extrusion process.
Tannprotesene, broene, kronene eller tennene ifølge oppfinnelsen fåes etter denne fremgangsmåte idet man former polyuretanelastifiserte polymetakrylater eventuelt i blanding med vanlig "sprøytbare" polymetylmetakrylater over en sprøyte-eller over en ekstrusjonsinnretning. The dental prostheses, bridges, crowns or teeth according to the invention are obtained according to this method by molding polyurethane-elasticized polymethacrylates, possibly in a mixture with ordinary "sprayable" polymethyl methacrylates over a syringe or over an extrusion device.
Spesielt mangesidig til fremstilling av tannproteser, broer eller 'kroner er imidlertid pulver-væske fremgangsmåten. Formlegemene ifølge oppfinnelsen fåes etter denne fremgangsmåten idet det anvender polyuretanelastifisert polymetakrylat som pulver. Dette pulver kan fåes ved at polyuretanelastifisert polymetakrylat over en knuseprosess omdannes i et såkalt "splitterakrylat". Spesielt gode resultater fåes imidlertid når det anvendes slike polyuretanelastifiserte polymetakry-latpulvere som er blitt fremstilt etter fremgangsmåten for en perlepolymerisasj on. However, the powder-liquid method is particularly versatile for the production of dental prostheses, bridges or crowns. The moldings according to the invention are obtained according to this method using polyurethane-elastified polymethacrylate as powder. This powder can be obtained by turning polyurethane-elastified polymethacrylate through a crushing process into a so-called "split acrylate". However, particularly good results are obtained when such polyurethane-elastified polymethacrylate powders are used which have been produced according to the method for a pearl polymerization.
Anvendelsen ifølge oppfinnelsen av elastifiserte polymer isatper ler medfører ved siden av den bedre forarbeidbarhet i forhold til splitterakrylater i tillegg den fordel at de elastifiserende komponenter bedre er avskjermet overfor en avbygning ved å generelt mot en innvirkning av komponenter i munnmiljøet. Ved dentalperlene omhylles det som adskilt fase tilstedeværende polyuretan av grunnstoffet av dentalperlene polymetakrylat og således avskjermes for en innvirkning. Dessuten innleires også selve dentalperlene igjen i en matrix av polymetakrylat og avskjermes dermed. The use according to the invention of elastified polymer ice pearls entails, in addition to the better processability compared to splinter acrylates, the additional advantage that the elastifying components are better shielded from degradation by generally against an impact of components in the oral environment. With the dental beads, the polyurethane present as a separate phase is enveloped by the base material of the dental beads polymethacrylate and thus shielded from an impact. In addition, the dental beads themselves are again embedded in a matrix of polymethacrylate and thus shielded.
En spesiell utførelsesform ved fremgangsmåten ifølge oppfinnelsen til fremstilling av proteser, kroner eller broer etter pulver-væske fremgangsmåten består i å innstille den ønskede forarbeidbarhet og den nødvendige forarbeidelsesbredde ved at man anvender de elastifiserte dentalperler i en definert korn-størrelse eller at man innstiller svelleforholdet av polymeri-satperlene ved anvendelse av komonomere ved perlepolymerisasjonen. Helt spesielt fordelaktig er det imidlertid å innstille de karakteristiske størrelser, forarbeidbarhet og forarbeidelsesbredde som er spesielt viktig for en tannteknisk håndtering ved tilsetning av ikke elastifiserende perler. Det var over-raskende at den gode elastifiserende virkning av dentalperlene ikke minskes når sistnevnte anvendes i blanding med vanlige dentalperler. De teknisk gunstigste blandingsforhold må riktig-nok vastslås fra det ene tilfelle til det andre og avhenger av protesens eller broens konstruksjon og funksjon. A special embodiment of the method according to the invention for the production of prostheses, crowns or bridges according to the powder-liquid method consists in setting the desired processability and the required processing width by using the elasticized dental beads in a defined grain size or by setting the swelling ratio of the polymerized beads using comonomers in the bead polymerization. However, it is particularly advantageous to set the characteristic sizes, processability and processing width, which are particularly important for dental technical handling when adding non-elastifying beads. It was surprising that the good elastifying effect of the dental beads is not reduced when the latter are used in a mixture with ordinary dental beads. Admittedly, the most technically favorable mixing ratios must be determined from case to case and depend on the construction and function of the prosthesis or bridge.
Med polymetakrylater innen oppfinnelsens ramme forstås polymerisasjonsprodukter og metakrylsyreestere. I de fleste tilfeller er metakrylsyremetylesteren hovedkomponenten. Imidlertid fåes-brukbare resultater også med polyfunksjonelle estere av metakrylsyre og for spesielle formål gir eksempel- Within the scope of the invention, polymethacrylates are understood to mean polymerization products and methacrylic acid esters. In most cases, the methacrylic acid methyl ester is the main component. However, useful results are also obtained with polyfunctional esters of methacrylic acid and for special purposes give for example
vis bis-GMA eller dets modifikasjonsprodukter og også de i US patent 3-730.9^7 nevnte komonomerer gode resultater. show bis-GMA or its modification products and also the comonomers mentioned in US patent 3-730.9^7 good results.
Med polyuretaner innen oppfinnelsens ramme forstås reaksjonsprodukter av polyoler og polyisocyanater. Teknisk interesse finner spesielt slike polyuretaner som fåes fra nedenstående diisocyanater: A) Alifatiske diisocyanater med forgrenede karbonskje-lett fra 7 til 36 C-atomer, f.eks. 2.2.4- eller 2.4.4-trimetyl-heksan-1,6-diisocyanat eller tekniske blandinger herav fra estralysin avledede diisocyanater eller diisocyanater på basis av dimeriserte fettsyrer, som fremstilles på kjent måte ved overføring av slike dikarboksylsyrer med inntil 36 C-atomer i • Polyurethanes within the scope of the invention are reaction products of polyols and polyisocyanates. Polyurethanes that are obtained from the following diisocyanates are of particular technical interest: A) Aliphatic diisocyanates with branched carbon skeletons from 7 to 36 C atoms, e.g. 2.2.4- or 2.4.4-trimethyl-hexane-1,6-diisocyanate or technical mixtures thereof from diisocyanates derived from estralysin or diisocyanates based on dimerized fatty acids, which are prepared in a known manner by the transfer of such dicarboxylic acids with up to 36 C atoms in •
de tilsvarende diamirier og etterfølgende fosgenering.the corresponding diamiries and subsequent phosgenation.
B) Cykloalifatiske diisocyanater, eksempelvis 1.3-cyklo- butan-diisocyanat, 1,3- og 1,4-cykloheksandiisocyanat, 2,4-eller 2,6-diisocyanat-l-metylcykloheksan eller 4,4'-diiso-cyanatdicykloheksylmetan enten i form av de rene geometriske isomere eller tekniske blandinger av disse, videre 1-isocya-nato~3j 3j 5-trimetyl-5-isocyanatometylcykloheksan (isoforondiisocyanat) samt endelig C) ved radikalisk podningskopolymerisasjon med vinyl-monomere modifiserte alifatiske eller cykloalifatiske diisocyanater som fåes således at man i nærvær av 100 deler av diisocyanatet bringer til polymerisasjon fra 10 til 100 deler fortrinnsvis metylmetakrylat med hjelp av en radikalisk poly-merisas j onsinitiator, eksempelvis et organisk peroksyd som benzoylperoksyd, tert.-butylperoktoat etc. eller en alifatisk azoforbindelse som azoisobutylonitril. Som podningssubstrat egner det seg ved siden av de allerede nevnte diisocyanater også alifatiske diisocyanater med lineære karbonkjeder, eksempelvis heksametylendiisocyanat. Det har vist seg at på denne måte modifiserte alifatiske diisocyanater fører til polyuretanurinstoffelastomerer som er klart oppløselige i monomer metylmetakrylat og ved riktig tilpasning av brytnings-indeks av polymer- og seigfase gir klare polymerisater. B) Cycloaliphatic diisocyanates, for example 1,3-cyclobutane diisocyanate, 1,3- and 1,4-cyclohexane diisocyanate, 2,4-or 2,6-diisocyanate-1-methylcyclohexane or 4,4'-diisocyanate dicyclohexylmethane either in form of the pure geometric isomers or technical mixtures thereof, further 1-isocyanato~3j 3j 5-trimethyl-5-isocyanatomethylcyclohexane (isophorone diisocyanate) and finally C) by radical graft copolymerization with vinyl monomer modified aliphatic or cycloaliphatic diisocyanates which are thus obtained that in the presence of 100 parts of the diisocyanate, from 10 to 100 parts preferably methyl methacrylate is brought to polymerization with the help of a radical polymerization initiator, for example an organic peroxide such as benzoyl peroxide, tert-butyl peroctoate etc. or an aliphatic azo compound such as azoisobutylonitrile. In addition to the already mentioned diisocyanates, aliphatic diisocyanates with linear carbon chains, for example hexamethylene diisocyanate, are also suitable as a grafting substrate. It has been shown that aliphatic diisocyanates modified in this way lead to polyurethaneurea elastomers which are clearly soluble in monomeric methyl methacrylate and, by correct adaptation of the refractive index of the polymer and viscous phase, give clear polymers.
Fortrinnsvis anvendes isoforondiisocyanatet og ved podningskopolymerisasjon med metylmetakrylatmodifisert heksametylendiisocyanat eller isoforondiisocyanat med et polymeri-satinnhold inntil 50%, fortrinnsvis inntil 40%. The isophorone diisocyanate is preferably used and by graft copolymerization with methyl methacrylate modified hexamethylene diisocyanate or isophorone diisocyanate with a polymer content of up to 50%, preferably up to 40%.
Som polyoler som kommer på tale for fremstilling av polyuretaner i henhold til oppfinnelsen egner det seg lengere-kjedede diole med 2 endeplasserte hydroksylgrupper. Fortrinnsvis anvendes polyester,'polyeter, polyacetale, polykarbonater med molekylvekter fra 400 til 6000 som har en glassovergangs-temperatur under lik 20°C. Suitable polyols for the production of polyurethanes according to the invention are longer-chain diols with 2 terminal hydroxyl groups. Polyester, polyether, polyacetal, polycarbonates with molecular weights from 400 to 6000 which have a glass transition temperature below equal to 20°C are preferably used.
Egnede hydroksylgruppeholdige polyestere er eksempelvis omsetningsprodukter av 2-verdige alkoholer med 2-verdig karbok-sylsyre. Suitable polyesters containing hydroxyl groups are, for example, reaction products of dihydric alcohols with dihydric carboxylic acid.
Ved fremstillingen av de ifølge oppfinnelsen anvendbare polyuretaner anvender man hydroksyl- og isocyanatkomponentene i ikke ekvivalente mengder, men anvender et overskudd av den ene eller den andre komponent. Spesielt ved prepolymerfrem-gangsmåten får man i første trinn en for OH-grupper fritt NCO- funksjonelt polyuretanprepolymer som dessuten kan få diisocyanat og omsetter dette i annet trinn med kjedeforlengede inntil oppnåelse av den ønskede molekylvekt. Det blir vanlig-vis tilbake en rest av frie NCO-grupper i produktet som hen-siktsmessig lukkes ved hjelp av en monofunksjonell kjedeav-bryter (komponent C). Egnede kjedeavbrytere er eksempelvis de lavere alifatiske alkoholer som metan og metanol, butanol eller allylalkohol. In the production of the polyurethanes that can be used according to the invention, the hydroxyl and isocyanate components are not used in equivalent amounts, but an excess of one or the other component is used. Especially in the prepolymer process, in the first step an NCO-functional polyurethane prepolymer free of OH groups is obtained, which can also receive diisocyanate, and this is reacted in the second step with chain extenders until the desired molecular weight is achieved. There is usually a residue of free NCO groups left in the product, which is appropriately closed using a monofunctional chain breaker (component C). Suitable chain interrupters are, for example, the lower aliphatic alcohols such as methane and methanol, butanol or allyl alcohol.
Kjedeforlengere av de ifølge oppfinnelsen anvendbare polyuretaner og egnede kortkjedede forbindelser med' 2 hydrok-sylforbindelser er eksempelvis: Etylenglykol, propylenglykol-(1,2) og -(1,3)»butylen-glykol-(1,4), -(1jJ3) og -(2,3), pentadiol-(1, 5) j heksandiol-(1,6), oktandiol-(1,8), neopentylglykol, 1,4-bis-hydroksy-metyl-cykloheksan, 2-metyl-l,3-propan-diol, dietylenglykol, trietylenglykol, tetraetylenglykol, polyetylenglykol med molekylvekt 400, dipropylenglykol, polypropylenglykol med molekylvekt 400, dibutylenglykol, polybutylenglykol med molekylvekt < 400, 4,4'-dihydroksy-difenylpropan eller hydrokinon-bis(2-hydroksyetyleter). Chain extenders of the polyurethanes applicable according to the invention and suitable short-chain compounds with 2 hydroxyl compounds are, for example: Ethylene glycol, propylene glycol (1,2) and -(1,3)"butylene glycol-(1,4), -(1jJ3 ) and -(2,3), pentadiol-(1,5) j hexanediol-(1,6), octanediol-(1,8), neopentyl glycol, 1,4-bis-hydroxy-methyl-cyclohexane, 2-methyl -1,3-propane diol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol with molecular weight 400, dipropylene glycol, polypropylene glycol with molecular weight 400, dibutylene glycol, polybutylene glycol with molecular weight < 400, 4,4'-dihydroxy-diphenylpropane or hydroquinone-bis(2- hydroxyethyl ether).
De polyuretanelastifiserte polymetakrylater blandes til deres tanntekniske forarbeidelse etter pulver-/væskefremgangsmåten med en monomer til en deig. Som monomer tjener fortrinnsvis metylmetakrylat. Por økning av oppløsningsmiddelbestandig-heten av slitasjefastheten tilsetter man monomerer som inneholder 2 eller flere dobbelt-bindinger i molekylet og som dermed fører til en nettdannelse. Som nettdannere kan man eksempelvis tilsette følgende forbindelser i mengder fra 0,1 vekt-% til 30 vekt-%, fortrinnsvis 1 vekt-% til 15 vekt-%. The polyurethane-elastified polymethacrylates are mixed for their dental processing according to the powder/liquid method with a monomer to form a dough. Methyl methacrylate is preferably used as monomer. To increase the solvent resistance of the wear resistance, monomers are added which contain 2 or more double bonds in the molecule and which thus lead to a network formation. As network formers, the following compounds can for example be added in amounts from 0.1% by weight to 30% by weight, preferably 1% by weight to 15% by weight.
Etylenglykoldimetakrylat, trietylenglykoldimetakrylat, butandioldimetakrylat, trimetylolpropantrimetakrylat, bis-GMA, metylenbisakrylamid, triakrylformal samt de i US patent 3.730.947 nevnte bifunksjonelle •komonoraere. Ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, butanediol dimethacrylate, trimethylolpropane trimethacrylate, bis-GMA, methylene bisacrylamide, triacrylformal as well as the bifunctional comonomers mentioned in US patent 3,730,947.
Herdingen av de dannede masser av perlepolymerisat og monomer kan bevirkes ved radikalleverende startesystemer for basis av peroksyder eller alifatiske azoforbindelser. Egnede polymerisasjonsstartere er eksempelvis diacylperoksyder, som eksempelvis dibenzoylperoksyd, alkylacylperoksyd som eksempelvis tertiærbutylperpivalat, eventuelt i nærvær av akseleratorer som aromatiske tertiæraminer, eksempelvis alkylerte aniliner, toluidiner, xylidiner. Som akselerator kan det videre finne anvendelse kobolt- og kobbersalter samt forbindelser fra gruppen av barbiturater som sulfinsyre og sulfoner. The hardening of the formed masses of pearl polymer and monomer can be effected by radical-generating starting systems based on peroxides or aliphatic azo compounds. Suitable polymerization initiators are, for example, diacyl peroxides, such as dibenzoyl peroxide, alkyl acyl peroxide such as tertiary butyl perpivalate, possibly in the presence of accelerators such as aromatic tertiary amines, for example alkylated anilines, toluidines, xylidines. Cobalt and copper salts as well as compounds from the group of barbiturates such as sulfinic acid and sulfones can also be used as accelerators.
Mens herdningen kan gjennomføres ved forhøyet temperatur ved peroksyder som dibenzoylperoksyd, klorbenzoylperoksyd, toluylperoksyd, eller laurylperoksyd alene eller ved radikal-startere som eksempelvis azoisosmørsyrenitril eller azoisosmør-syreestere alene gjør en herding ved lavere temperaturer nød-vendig tilsetning av akseleratorer. Ved herding ved høyere temperaturer krever man fra 0,01 vekt-% til 2 vekt-% av poly-merisasjonsstarter. Ved herding ved lavere temperaturer krever man-0,02 vekt-% til 5 vekt-% av polymerisasjonsstartere som 0,02 vekt-% til 5 vekt-% av akseleratorer. While curing can be carried out at an elevated temperature with peroxides such as dibenzoyl peroxide, chlorobenzoyl peroxide, toluyl peroxide or lauryl peroxide alone or with radical initiators such as for example azoisobutyric acid nitrile or azoisobutyric acid esters alone, curing at lower temperatures necessitates the addition of accelerators. When curing at higher temperatures, from 0.01% by weight to 2% by weight of polymerization starter is required. When curing at lower temperatures, one requires 0.02 wt.% to 5 wt.% of polymerization initiators as 0.02 wt.% to 5 wt.% of accelerators.
Eksempel 1Example 1
Dentalperler fremstilles ved en fremgangsmåte til perlepolymerisasjon av metylmetakrylat "'i nærvær av et polyuretan. Dental beads are produced by a method for bead polymerization of methyl methacrylate in the presence of a polyurethane.
Som dispergator ved perlepolymerisasjonen ble det anvendt MgCO-j. som peroksydisk starter en blanding av lauroyl peroksyd og dicykloheksylperkarbonat .i forholdet 1:1 i en mengde på 0,73% prefererte anvendt metylmetakrylat (vekt-%). Metylmetakrylatet inneholder oppløst 9, 9% polyuretan. MgCO-j was used as a dispersant in the bead polymerization. as a peroxidic starter, a mixture of lauroyl peroxide and dicyclohexyl percarbonate in a 1:1 ratio in an amount of 0.73% methyl methacrylate (wt%) is preferred. The methyl methacrylate contains dissolved 9.9% polyurethane.
Ved polyuretanet dreier det som om en "diol" forlenget polyesterpolyuretan på basis av en blanding av to polyester-dioler A og B. In the case of polyurethane, it is as if a "diol" is extended polyester polyurethane based on a mixture of two polyester diols A and B.
Polyesterdiol A består av en polyester på basis av adipinsyre, 1,6-heksandiol og neopentylglykol med et hydroksyltall 66. Polyesterdiol A consists of a polyester based on adipic acid, 1,6-hexanediol and neopentyl glycol with a hydroxyl number of 66.
Polyester B er en polyester på basis av etylenglykol, adipinsyre og ftalsyreanhydrid med et hydroksyltall på 64. Polyester B is a polyester based on ethylene glycol, adipic acid and phthalic anhydride with a hydroxyl number of 64.
Polyester A (0,35 ekvivalente) og polyester B (0,15 ekvivalente) omsettes med isoforondiisocyanat (0,75 ekvivalente), med butandiol-1,4 til en forlengelsesgrad på 85% og avstoppes med 2-hydroksyetylmetakrylat. Polyuretandannelsen katalyseres med tinndioktoat. 15 vektdeler av de på denne måte fremstilte dentalperler blandes med 0,25 vekt-% dibenzoylperoksyd og deigdannet med 5j36 vektdeler av en væske av 94 vekt-% metylmetakrylat og 6 vekt-% etylenglykoldimetakrylat. Av denne deig presses Polyester A (0.35 equivalents) and polyester B (0.15 equivalents) are reacted with isophorone diisocyanate (0.75 equivalents), with butanediol-1,4 to a degree of elongation of 85% and stoppered with 2-hydroxyethyl methacrylate. The polyurethane formation is catalysed with tin dioctoate. 15 parts by weight of the dental beads produced in this way are mixed with 0.25% by weight of dibenzoyl peroxide and the dough formed with 5.36 parts by weight of a liquid of 94% by weight of methyl methacrylate and 6% by weight of ethylene glycol dimethacrylate. From this dough is pressed
2 mm tykke plater og polymeriseres deretter.2 mm thick sheets and then polymerized.
Polymerisasjonen gjennomføres som følger: I løpet avThe polymerization is carried out as follows: During
30 min. oppvarmes vannbadet til 70°C, 30 min. holdes tempera-turen konstant og oppvarmes deretter til 100°C og denne temperatur holdes konstant i ytterligere 30 min. Kyvettens avkjø-ling foregår i vannbad. 30 min. heat the water bath to 70°C, 30 min. the temperature is kept constant and then heated to 100°C and this temperature is kept constant for a further 30 min. The cuvette is cooled in a water bath.
Etter avformihg kuttes da platen til prøvelegemer uten oppvarming av platen. De således dannede prøvelegemer underkastes ifølge DIN 53 452 dynstatundersøkelse. After shaping, the plate is then cut into test pieces without heating the plate. The test specimens formed in this way are subjected to a dynamic test according to DIN 53 452.
Prøveresultater: (hver gang middelverdier av 5 prøvelegemer) Test results: (each time mean values of 5 test bodies)
I eksemplene 2, 3 og 4 anvendes likeledes ved hjelp av polyuretaner elastifiserte dentalperler. Disse dentalperler adskiller seg deri at ved perlepolymerisasjonen anvendes forskjellige polyuretaner som elastifiserende stoffer. In examples 2, 3 and 4, dental beads elasticized with the help of polyurethanes are also used. These dental beads differ in that different polyurethanes are used as elasticizing substances during the bead polymerization.
Eksempel 2Example 2
D.entalperlene inneholder en polyuretan hvor det til fremstillingen isteden for 0,75 ekvivalenter isoforondiisocyanat ble anvendt 1 ekvivalent isoforondiisocyanat. Til for-lengelse ble det med butandiol brakt til en forlengelsesgrad på 90%. De på denne måte dannede perler ble blandet med 0,5 vekt-% lauroylperoksyd og polymerisert med en væske bestående av 97 vekt-% metylmetakrylat og 3 vekt-% trietylenglykoldi-metakrylåt og fasthetsundersøkelsen underkastet ifølge DIN 53 452: The D.enthal beads contain a polyurethane where 1 equivalent of isophorone diisocyanate was used instead of 0.75 equivalents of isophorone diisocyanate. For elongation, it was brought to an elongation of 90% with butanediol. The beads formed in this way were mixed with 0.5% by weight of lauroyl peroxide and polymerized with a liquid consisting of 97% by weight of methyl methacrylate and 3% by weight of triethylene glycol dimethacrylate and subjected to the strength test according to DIN 53 452:
Eksempel 3 Example 3
De anvendte déntalperler ble dannet på samme måte somThe dental beads used were formed in the same way as
i eksempel 1. Som elastifiserende polyuretan ble det anvendt en polyesterpolyuretan fremstilt med 1,25 ekvivalenter isoforondiisocyanat og med butanol-1,4 brakt til en forlengelsesgrad på 90%. in example 1. A polyester polyurethane prepared with 1.25 equivalents of isophorone diisocyanate and with butanol-1,4 brought to a degree of elongation of 90% was used as elastifying polyurethane.
De på denne måte dannede perler ble blandet med 0,1 vekt-% diklordibenzoylperoksyd og polymerisert med en væske bestående av 90 vekt-% metylmetakrylat og 10 vekt-% trimetylolpropantrimetakrylat og fasthetsundersøkelse foretatt ifølge DIN 53 452: The beads formed in this way were mixed with 0.1% by weight of dichlorodibenzoyl peroxide and polymerized with a liquid consisting of 90% by weight of methyl methacrylate and 10% by weight of trimethylolpropane trimethacrylate and a strength test carried out according to DIN 53 452:
Eksempel 4 Example 4
De anvendte dentalperler er elastifisert med polyuretan som ble fremstilt under anvendelse av 1,5 ekvivalenter isoforondiisocyanat og med butanol-1,4 brakt til en forlengelsesgrad på 90%. The dental beads used are elasticized with polyurethane which was produced using 1.5 equivalents of isophorone diisocyanate and with butanol-1,4 brought to a degree of elongation of 90%.
De på denne måte dannede polymerisater ble blandet medThe polymers formed in this way were mixed with
1 vekt-% ditoluylperoksyd og polymerisert med en væske bestående av 88 vekt-% metylmetakrylat og 12 vekt-% butandioldimetakrylat og underkastet fasthetsundersøkelse ifølge DIN 53 452: 1% by weight ditoluene peroxide and polymerized with a liquid consisting of 88% by weight methyl methacrylate and 12% by weight butanediol dimethacrylate and subjected to a strength test according to DIN 53 452:
Eksempel 5 Example 5
4 vektdeler av de ifølge eksempel 1 fremstilte dentalperler blandes med 1 vekt-% bis-4-klorbenzoylperoksyd og deig-dannes med 3 vektdeler av en væske bestående av 94 vekt-% metylmetakrylat, 6 vekt-% etylenglykoldimetakrylat og 0,7 vekt-% N,N'-dimetyl-p-toluidin. Ved dette blandingsforhold får man en støpbar konsistens. Knabar konsistens får man ved et blandingsforhold på 4,7 vektdeler pulver med 2 vektdeler væske. Polymerisasjonen avsluttes ved 23°C etter 16-17 min. 4 parts by weight of the dental beads produced according to example 1 are mixed with 1% by weight bis-4-chlorobenzoyl peroxide and dough is formed with 3 parts by weight of a liquid consisting of 94% by weight methyl methacrylate, 6% by weight ethylene glycol dimethacrylate and 0.7% by weight N,N'-dimethyl-p-toluidine. With this mixing ratio, you get a pourable consistency. A crunchy consistency is obtained by mixing 4.7 parts by weight of powder with 2 parts by weight of liquid. The polymerization ends at 23°C after 16-17 min.
De i eksempel 1 omtalte prøvelegemer underkastes ifølge DIN 53 452 dynstatundersøkelse. Prøveresultater: The test specimens mentioned in example 1 are subjected to a dynamic test according to DIN 53 452. Test results:
(Hver gang middelverdier av 5 prøvelegemer).(Each time mean values of 5 specimens).
Sammenligning Comparison
Som kontrollforsøk ble vanlig metylmetakrylatperler med 0,25 vekt-% dibenzoylperoksyd polymerisert med en væske As a control experiment, ordinary methyl methacrylate beads with 0.25% by weight of dibenzoyl peroxide were polymerized with a liquid
•bestående av 94% metylmetakrylat og 6 vekt-% etylenglykoldimetakrylat og underkastet fasthetsprøve ifølge DIN 53 452: •consisting of 94% methyl methacrylate and 6% by weight ethylene glycol dimethacrylate and submitted to a strength test according to DIN 53 452:
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772723604 DE2723604A1 (en) | 1977-05-25 | 1977-05-25 | DENTAL MOLDED BODY |
Publications (1)
Publication Number | Publication Date |
---|---|
NO781714L true NO781714L (en) | 1978-11-28 |
Family
ID=6009829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO78781714A NO781714L (en) | 1977-05-25 | 1978-05-16 | DENTAL SHAPE BODIES. |
Country Status (17)
Country | Link |
---|---|
JP (1) | JPS53148196A (en) |
AT (1) | AT375544B (en) |
AU (1) | AU516504B2 (en) |
BE (1) | BE867471A (en) |
BR (1) | BR7803312A (en) |
CH (1) | CH637284A5 (en) |
DE (1) | DE2723604A1 (en) |
DK (1) | DK229578A (en) |
ES (1) | ES470179A1 (en) |
FR (1) | FR2391706A1 (en) |
IL (1) | IL54758A0 (en) |
IT (1) | IT1096314B (en) |
LU (1) | LU79695A1 (en) |
NL (1) | NL7805634A (en) |
NO (1) | NO781714L (en) |
SE (1) | SE7805935L (en) |
ZA (1) | ZA782978B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56152408A (en) * | 1980-04-29 | 1981-11-26 | Kuraray Co Ltd | Material for dental use |
DE102005012825B4 (en) * | 2005-03-17 | 2009-05-07 | Heraeus Kulzer Gmbh | High Impact denture resins and their use |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3641199A (en) * | 1969-07-07 | 1972-02-08 | Rohm & Haas | Urethane elastomer with active hydrogen containing monoethylenical unsaturated monomer |
DE2719149A1 (en) * | 1977-04-29 | 1978-11-09 | Bayer Ag | METHOD FOR MANUFACTURING PEARL POLYMERS |
DE2749564C2 (en) * | 1977-11-05 | 1986-06-26 | Bayer Ag, 5090 Leverkusen | Dental moldings |
DE2741196A1 (en) * | 1977-09-13 | 1979-03-15 | Bayer Ag | METHOD FOR MANUFACTURING PEARL POLYMERS |
DE2752611A1 (en) * | 1977-11-25 | 1979-06-07 | Bayer Ag | MOLDED DENTAL BODY |
-
1977
- 1977-05-25 DE DE19772723604 patent/DE2723604A1/en not_active Withdrawn
-
1978
- 1978-05-16 NO NO78781714A patent/NO781714L/en unknown
- 1978-05-19 AU AU36290/78A patent/AU516504B2/en not_active Expired
- 1978-05-22 IL IL54758A patent/IL54758A0/en unknown
- 1978-05-22 CH CH552878A patent/CH637284A5/en not_active IP Right Cessation
- 1978-05-23 LU LU79695A patent/LU79695A1/en unknown
- 1978-05-23 JP JP6069178A patent/JPS53148196A/en active Pending
- 1978-05-23 IT IT23712/78A patent/IT1096314B/en active
- 1978-05-23 AT AT0373878A patent/AT375544B/en not_active IP Right Cessation
- 1978-05-24 ES ES470179A patent/ES470179A1/en not_active Expired
- 1978-05-24 FR FR7815405A patent/FR2391706A1/en active Granted
- 1978-05-24 ZA ZA00782978A patent/ZA782978B/en unknown
- 1978-05-24 BR BR7803312A patent/BR7803312A/en unknown
- 1978-05-24 DK DK229578A patent/DK229578A/en unknown
- 1978-05-24 NL NL7805634A patent/NL7805634A/en not_active Application Discontinuation
- 1978-05-24 SE SE7805935A patent/SE7805935L/en unknown
- 1978-05-25 BE BE188031A patent/BE867471A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CH637284A5 (en) | 1983-07-29 |
BR7803312A (en) | 1978-12-19 |
ES470179A1 (en) | 1979-01-01 |
AT375544B (en) | 1984-08-10 |
IT1096314B (en) | 1985-08-26 |
DK229578A (en) | 1978-11-26 |
JPS53148196A (en) | 1978-12-23 |
AU3629078A (en) | 1979-11-22 |
IT7823712A0 (en) | 1978-05-23 |
AU516504B2 (en) | 1981-06-04 |
BE867471A (en) | 1978-11-27 |
FR2391706B1 (en) | 1984-08-24 |
FR2391706A1 (en) | 1978-12-22 |
ZA782978B (en) | 1979-05-30 |
ATA373878A (en) | 1984-01-15 |
NL7805634A (en) | 1978-11-28 |
IL54758A0 (en) | 1978-07-31 |
LU79695A1 (en) | 1979-02-02 |
DE2723604A1 (en) | 1978-11-30 |
SE7805935L (en) | 1978-11-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4254002A (en) | Tough plastics based on castor oil elastomer-reinforced vinyl polymers | |
US4480079A (en) | Copolymerization of unsaturated urethane monomers | |
CN104710576B (en) | Thermotropic crosslinking type shape memory polyurethane material and preparation method thereof | |
GB1239701A (en) | ||
CA2157217A1 (en) | Low-viscosity, stable, agglomerate-free polymer polyols, a process for their preparation and their use in producing polyurethane plastics | |
US3829531A (en) | Additive for impact modified thermoplastics | |
EP0002201B1 (en) | Moulded dental structures made of polymethacrylates, process for their manufacture, and use of polymethacrylate compositions | |
DE2914984A1 (en) | METHOD FOR PRODUCING POLYMERISATS | |
EP0064809B1 (en) | Copolymerisation of unsaturated urethane monomers | |
CH616694A5 (en) | Process for the preparation of crosslinked, water-insoluble, hydrophilic copolymers | |
CA3143083A1 (en) | A curable polyurethane based resin for use in additive manufacturing | |
CS203191B2 (en) | Method of producing biphasic granular polymer | |
US3637909A (en) | Polyurethanes process and product prepared from aliphatic polycarbonates containing in situ polymerized unsaturated compounds | |
US4422996A (en) | Method for making coated molded articles | |
CN113292684B (en) | Modified polymethyl methacrylate and preparation method thereof | |
CN111440587A (en) | High-performance pressure-sensitive adhesive and preparation method thereof | |
JP2851875B2 (en) | Plastic lens | |
CN110627983A (en) | Low-density high-strength high-yellow-resistance TPU (thermoplastic polyurethane) for shoe sole and preparation method thereof | |
US3859381A (en) | Crosslinked polyurethanes from polyurethane precursors and vinyl monomers | |
NO781714L (en) | DENTAL SHAPE BODIES. | |
US4233424A (en) | Process for the production of bead polymers | |
DE2749564C2 (en) | Dental moldings | |
USRE35280E (en) | Copolymerization of unsaturated urethane monomers | |
DE1106959B (en) | Process for the production of linear, elastic polyester urethanes | |
US3031422A (en) | Preparation of organic plastic materials |