摘要:
The invention provides pH- or redox-responsive and charge-neutral polymeric nanogels that stably encapsulate a biomolecule at one pH or redox condition and then release it at a different pH or redox condition, and compositions and methods of preparation and use thereof
摘要:
Polymerizable isocyanurate monomers and dental compositions are described. A hardenable dental composition is described comprising at least one isocyanurate monomer that is a stable liquid at about 25 °C. The isocyanurate monomer comprises at least one divalent linking group bonded to a nitrogen atom of a trivalent isocyanuric acid ring, wherein the divalent linking group comprises a moiety selected from ester, thioester, ether, or thioether, and combinations of such moieties and a terminal ethylenically unsaturated polymerizable group.
摘要:
Polymerizable isocyanurate monomers and dental compositions are described. The hardenable dental composition is described comprising at least one isocyanurate monomer that is a stable liquid at about 25°C. The isocyanurate monomer comprises at least one divalent linking group bonded to a nitrogen atom of a trivalent isocyanuric acid ring; wherein the divalent linking group comprises a moiety selected from ester, thioester, ether, or thioether, and combinations of such moieties and a terminal ethylenically unsaturated polymerizable group.
摘要:
Gegenstand der Erfindung sind Polymere, enthaltend Struktureinheiten von Monomeren (A) nach Formel (I) worin A für eine C 2 - bis C 4 -Alkylengruppe, R 1 für Wasserstoff oder Methyl, k für eine Zahl von 1 bis 1000 stehen, und deren Verwendung zur Spaltung von Öl/Wasser-Emulsionen in Mengen von 0,0001 bis 5 Gew.-% bezogen auf den Ölgehalt der zu spaltenden Emulsion.
摘要:
Process for the manufacture of polymers having repeating units comprising spiro orthoester groups of general formula (I), wherein A is C1-6-alkylene, C1-6-alkyleneoxycarbonyl or an oxygen-carbon bond, R1 is hydrogen or methyl, R2 is C1-6-alkyl or C1-6-alkyl substituted by C1-6-alkoxy or aryloxy, R3 and R4 independently are hydrogen or C1-6-alkyl, R5 is hydrogen or methyl, R6 is hydrogen, methyl, phenyl, carboxy, carboxy-C1-6-alkyl, carboxamido or cyano, n is an integer > 1 and m is 0 or an integer >= 1, with the proviso that the molecular weight of the polymer is between 500 and 1 000 000, the polymers obtained and their use specifically in dental filling materials.
摘要:
The invention relates to a preparation method of a polymeric phase-change material, compring: using 1, 2 or 3 of (meth)acrylate poly(ethylene glycol) n-alkyl ether ester as a raw material, wherein the (meth)acrylate poly(ethylene glycol) n-alkyl ether ester has a structural general formula of CH 2 =C(CH 3 )-COO(CH 2 CH 2 O) m C n H 2n+1 or CH 2 =CH-COO(CH 2 CH 2 O) m C n H 2n+1 , m=1 to 100, and n=10 to 50; washing the raw material with a solution of sodium hydroxide, potassium hydroxide, sodium carbonate or potassium carbonate having a mass percentage of 1% to 10% to remove a polymerization inhibitor, and subjecting reduced-pressure distillation, and then to a polymerization reaction by adopting one of the following process; 1. polymerization reaction initiated by irradiation; 2. polymerization reaction initiated by an initiator; 3. polymerization reaction in a solvent; after the polymerization reaction is completed, adding a precipitating agent to precipitate the polymeric phase-change material from the solution, and then washing with deionized water and dried, to obtain a polymeric phase-change material as a powder to block.
摘要翻译:本发明涉及聚合物相变材料的制备方法,其包括:使用1,2或3种(甲基)丙烯酸酯聚(乙二醇)正烷基醚酯作为原料,其中(甲基)丙烯酸酯聚 (乙二醇)正烷基醚酯具有CH 2 = C(CH 3)-COO(CH 2 CH 2 O)m C n H 2n + 1或CH 2 = CH-COO(CH 2 CH 2 O)m C n H 2n + 1,m = 1〜100的结构通式,n = 10〜50; 用质量百分比为1%至10%的氢氧化钠,氢氧化钾,碳酸钠或碳酸钾的溶液洗涤原料以除去阻聚剂,进行减压蒸馏,然后通过采用聚合反应 以下过程之一; 1.通过照射引发聚合反应; 2.由引发剂引发的聚合反应; 3.在溶剂中进行聚合反应; 聚合反应完成后,加入沉淀剂从溶液中沉淀聚合物相变材料,然后用去离子水洗涤并干燥,得到聚合物相变材料,以粉末形式封闭。