Controlled free-radical polymerization products using new controlled agents

Patent (2004)

A process for the production of polymers by means of pseudo-living free-radical polymerization is disclosed. The process entails (i) reacting a polymerizable vinyl monomer with nitrogen monoxide and at ... [more ▼]

A process for the production of polymers by means of pseudo-living free-radical polymerization is disclosed. The process entails (i) reacting a polymerizable vinyl monomer with nitrogen monoxide and at least one initiator to prepare a free-radical intermediate product, and (ii) polymerizing the intermediate product optionally together with one or more additional monomers and/or with a free-radical initiator. [less ▲]

A process for the synthesis of alkoxyamines and their use in controlled radical polymerization

Patent (2004)

PROBLEM TO BE SOLVED: To provide a method for synthesizing an alkoxyamine, and to provide a method for using the same in controlled radical polymerization. ; SOLUTION: This method for synthesizing the ... [more ▼]

PROBLEM TO BE SOLVED: To provide a method for synthesizing an alkoxyamine, and to provide a method for using the same in controlled radical polymerization. ; SOLUTION: This method for synthesizing the alkoxyamine expressed by general formula (I) or (II) [preferably, general formula (I)] comprises a one-pot process, wherein the process includes (1) reacting an oxidizing agent (A) with a sterically hindered secondary amine of general formula (III) in a water-containing medium to form a reaction product and an aqueous phase, (2) removing the aqueous phase, and (3) adding a free radical initiator (B) to the reaction product under such a condition that decomposition of the initiator is promoted to generate free radicals. Further, a method for polymerizing a monomer, namely the method for using the alkoxyamine synthesized by the method with originality, is provided [less ▲]

One-pot process for the preparation of functionalized alkoxyamines

Patent (2004)

The present invention relates to a new one-pot process for the preparation of functionalized alkoxyamine initiators of the formula (I) <CHEM> from amines of the formula (II) <CHEM> and to a process of ... [more ▼]

The present invention relates to a new one-pot process for the preparation of functionalized alkoxyamine initiators of the formula (I) <CHEM> from amines of the formula (II) <CHEM> and to a process of controlled radical polymerization using the functionalized alkoxyamine as initiators. In the above formulae, R<1>-R<5> have the meanings given in the description. [less ▲]

Process for the synthesis for alkoxy amines and their use in controlled radical polymerization

Patent (2004)

A one-pot process for the preparation of alkoxyamines conforming to formulae (I) or (II), preferably (I) is disclosed. The process entails (1) reacting of an oxidizing agent (A) with a sterically hindered ... [more ▼]

A one-pot process for the preparation of alkoxyamines conforming to formulae (I) or (II), preferably (I) is disclosed. The process entails (1) reacting of an oxidizing agent (A) with a sterically hindered secondary amine of the general formula (III), in a water-containing medium to form a reaction product and an aqueous phase, (2) removing of the aqueous phase, and (3) (adding to the reaction product a free-radical initiator (B) under conditions that promote the decomposition of the initiator to generate free radicals. Also disclosed is a process for polymerizing monomers, the process using the alkoxyamine prepared by the inventive process. [less ▲]

A process for the synthesis of alkoxyamines and their use in controlled radical polymerization

Patent (2003)

A one-pot process for the preparation of alkoxyamines conforming to formulae (I) or (II), preferably (I) (See formulas I and II) is disclosed. The process entails (1) reacting of an oxidizing agent (A ... [more ▼]

A one-pot process for the preparation of alkoxyamines conforming to formulae (I) or (II), preferably (I) (See formulas I and II) is disclosed. The process entails (1) reacting of an oxidizing agent (A) with a sterically hindered secondary amine of the general formula (III), (See formula III) in a water-containing medium to form a reaction product and an aqueous phase , (2) removing of the aqueous phase, and (3) adding to the reaction product a free-radical initiator (B) under conditions that promote the decomposition of the initiator to generate free radicals. Also disclosed is a process for polymerizing monomers, the process using the alkoxyamine prepared by the inventive process. [less ▲]

Preparation of reactive surfaces by electrografting

in Chemical Communications (2003), (19), 2500-2501

The electrografting process has been applied to a new monomer in order to induce reactivity to the surface of various conducting substrates which are then appropriate for the anchoring of a large variety ... [more ▼]

The electrografting process has been applied to a new monomer in order to induce reactivity to the surface of various conducting substrates which are then appropriate for the anchoring of a large variety of molecules (catalysts, proteins, amino-polymers etc.). [less ▲]

Controlled radical polymerization of alkyl methacrylates in the presence of NO/NO2 mixtures

in Matyjaszewski, Krzysztof (Ed.) Advances in controlled/living radical polymerization (2003)

Radical polymerization of alkyl methacrylates initiated by AIBN is controlled when conducted in the presence of a mixture of NO/NO2. Reaction of alkyl methacrylates with NO/NO2 leads indeed to the monomer ... [more ▼]

Radical polymerization of alkyl methacrylates initiated by AIBN is controlled when conducted in the presence of a mixture of NO/NO2. Reaction of alkyl methacrylates with NO/NO2 leads indeed to the monomer adduct and parent α-nitro, ω-nitroso oligomers, which are precursors of nitroxides, known to control the radical polymerization of alkyl methacrylates, according to a "Nitroxide-Mediated Polymerization" (NMP) mechanism. Although some side reactions may occur with time (increasing polydispersity), polymerization of MMA initiated by AIBN at low temperature (60°C) after bubbling of NO/NO2 is relatively fast, and the molecular weight is dictated by the amount of NO/NO2. Finally, for the first time, copolymerization of MMA with HEMA (10/1; v/v) has been controlled by this mixture of NO and NO2 although the reaction remains very fast (ca. 65% monomer conversion after 5 h at 60°C), which is of prime importance for coating applications. [less ▲]

Controlled synthesis of unsaturated aliphatic polyesters

Poster (2003, May 16)

Controlled free radical polymerization initiated from the surface of electrically conducting substrates

Poster (2003, May 16)

Novel aliphatic polyesters based on functional cyclic (di)esters

in Macromolecular Rapid Communications (2003), 24(2), 161-172

Recent progress in the chemical synthesis of novel aliphatic polyesters via ring-opening polymerization of functional cyclic (di)esters are reviewed in this article. Syntheses of these functional ... [more ▼]

Recent progress in the chemical synthesis of novel aliphatic polyesters via ring-opening polymerization of functional cyclic (di)esters are reviewed in this article. Syntheses of these functional aliphatic polyesters are being classified into three groups according to the structure of the cyclic monomers: (i) cyclic diesters, (ii) morpholine-2,5-dione derivatives, and (iii) cyclic esters. Progress in the synthesis and polymerization of monomers in each category is reported with an emphasis on controlled synthesis. The recent achievements have enabled the synthesis of a variety of novel aliphatic polyesters, including hydrophilic, halogenated, and unsaturated polyesters. [less ▲]