Über die polymerisation von methacrylsäuremethylester durch merkaptane in gegenwart von chlorid<sup>1</sup>. XII. Mitt. polymerisationen und polymerisationskatalysatoren<sup>2</sup>

Bredereck, Von Hellmut; Posselt, Klaus; Wagner, Adolf; Wurster, Gerd

doi:10.1002/macp.1963.020690112

Cited by 7 publications

(1 citation statement)

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“…More recently, N,N ‐dihydroxyethyl‐ p ‐toluidine (DEPT), which is more reactive and discolors the resin less than DMPT, have used instead of DMPT. On the other hand, to generate free radical for initiating polymerization, a reaction between 1,3,5‐trimethylbarbituric acid (TMBA) and copper‐ion or chloride‐ion has been applied 1–30. Thus, TMBA generates highly concentrated free radical and accelerates polymerization 31–40…”

Section: Introductionmentioning

confidence: 99%

Preparation of microcapsules containing TMBA (1,3,5‐trimethylbarbituric acid) by the drying‐in‐liquid method and its application

Fuchigami

Taguchi

2008

J of Applied Polymer Sci

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1,3,5-trimethylbarbituric acid (TMBA), an amphiphilic material used widely for redox catalysts, such as organic peroxide, aromatic tertiary amine, and anhydride, was microencapsulated by the drying-inliquid method with polyethylene methacrylate (PEMA) as a wall material. To prevent osmotically induced leakage of the core material into the continuous water phase during the microencapsulation process, TMBA was beforehand dissolved into the continuous water phase. In the experiment, the amount of TMBA dissolved and holdup of the dispersed oil phase were changed. The microencapsulation efficiency increased with the increase in the amount of TMBA dissolved but remained 36% at the highest even with the saturated level of TMBA. Also, the microencapsulation efficiency decreased with increase in holdup. The microcapsules containing TMBA were used for preparing a biological hard tissue-adhesive material and estimated for the microencapsulation effects. The adhesives containing the microencapsules were found to have excellent bonding properties and high storage stability.

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Section: Introductionmentioning

confidence: 99%

Preparation of microcapsules containing TMBA (1,3,5‐trimethylbarbituric acid) by the drying‐in‐liquid method and its application

Fuchigami

Taguchi

2008

J of Applied Polymer Sci

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Beitrag zur kenntnis der polymerisationsanregung mit redoxsystemen, die metallverbindungen enthalten

Srna

1969

Angew. Makromol. Chem.

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SUMMARY:Apart from the redox system peroxide/vanadium accelerator, only the combination hydroperoxide/cobalt (11) salt has obtained industrial importance for the 165 CHRISTIAN SRNAfree -radical initiated polymerization of unsaturated polyester resins at room temperature. Other metal compounds either do not react with peroxides to form radicals or only do so at a very low rate.It has been found that the presence of promotors or additional accelerators not only increases the action of cobalt compounds, but also activates compounds of manganese, copper and iron to such a degree that they can be used for initiating the polymerization of unsaturated polyester resins at room temperature.The following compounds were used as promotors in the investigations : N,N-dimethylaniline, t-dodecyl mercaptan, n-dodecyl mercaptan, sodium benzenesufiate, a-hydroxymethyl phenylsulfone, N-methyl-bis-(phenylsulfonemethyl)amine, ethyl acetoacetate, acetylacetone, and acetoacetdiethylamide.When these promotors are used merely in conjunction with peroxides, there is no formation of radicals or the rate of radical formation is only low. In contrast to this, the combination peroxide/metal compound/promotor has a remarkably high effectiveness as a polymerization initiator.The use of redox systems of this type is not confined to initiate polymerization of unsaturated polyester resins. They are also suitable for polymerizing other systems which can be subjected to free-radical initiated polymerization, e . g. acrylate syrups, styrene syrups and monomers.For each monomer system the optimum combination must be ascertained.

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Über CH‐aktive polymerisationsinitiatoren. XIII. Mitt. Polymerisationen und polymerisationsinitiatoren

et al. 1966

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ZUSAMMENFASSUNG:Verbindungen der allgemeinen Formel A-CH(R)-B, wobei A und B elektronenanziehende Gruppen, R ein Wasserstoffatom oder eine Alkylgruppe darstellen, wirken bei der Polymerisation von Monomeren (Methacrylsiuremethylester, Acrylnitril, Styrol, Vinylacetat u. a.) in Gegenwart von Cu++, C1-und Luftsauerstoff oder Peroxyden als Initiatoren. Die =CHR-Gruppe kann auch Glied eines carbo-oder heterocyclischen Ringes sein, z.B. in cyclischen P-Oxocarbonsaureestern, p-Oxolactonen, P-Diketonen, Pyrazolonen oder Barbitursiuren. Die Polymerisationsauslosung wird auf eine Autoxydation der aktiven CH-Gruppe zum Hydroperoxyd zuruckgefuhrt, das die Polymerisation auslost. SUMMARY:Compounds with the general formula A-CH(R)-B (A and B mean electron attracting

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Über die polymerisation von methacrylsäuremethylester durch merkaptane in gegenwart von chlorid¹. XII. Mitt. polymerisationen und polymerisationskatalysatoren²

Cited by 7 publications

References 10 publications

Preparation of microcapsules containing TMBA (1,3,5‐trimethylbarbituric acid) by the drying‐in‐liquid method and its application

Preparation of microcapsules containing TMBA (1,3,5‐trimethylbarbituric acid) by the drying‐in‐liquid method and its application

Beitrag zur kenntnis der polymerisationsanregung mit redoxsystemen, die metallverbindungen enthalten

Über CH‐aktive polymerisationsinitiatoren. XIII. Mitt. Polymerisationen und polymerisationsinitiatoren

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Über die polymerisation von methacrylsäuremethylester durch merkaptane in gegenwart von chlorid1. XII. Mitt. polymerisationen und polymerisationskatalysatoren2

Cited by 7 publications

References 10 publications

Preparation of microcapsules containing TMBA (1,3,5‐trimethylbarbituric acid) by the drying‐in‐liquid method and its application

Preparation of microcapsules containing TMBA (1,3,5‐trimethylbarbituric acid) by the drying‐in‐liquid method and its application

Beitrag zur kenntnis der polymerisationsanregung mit redoxsystemen, die metallverbindungen enthalten

Über CH‐aktive polymerisationsinitiatoren. XIII. Mitt. Polymerisationen und polymerisationsinitiatoren

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Über die polymerisation von methacrylsäuremethylester durch merkaptane in gegenwart von chlorid¹. XII. Mitt. polymerisationen und polymerisationskatalysatoren²