The present invention relates to a composition comprising at least one (meth)acrylic monomer, optionally at least one (meth)acrylic polymer and at least one organic peroxide chosen from hemiperoxyacetals. The invention also relates to the use of said at least one organic peroxide for the polymerization of a composition comprising at least one acrylic monomer and optionally at least one acrylic polymer, to the use of the composition of the invention for the manufacture of resins, to a process for manufacturing thermoplastic, thermoset or composite parts, and also to the parts obtained themselves.

An embolization system and methods for controlling solidification of embolic compositions comprising a first and a second embolic component that react with each other in vivo at a target site to form an embolic material, with the embolic components being dilutable in physiological fluids so that they do not form an embolic composition at a site that is not desired.

The present invention relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least two initiators. In particular the present invention relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least two initiators that have a different half life time. That liquid composition can be used as a syrup and especially as a syrup for impregnation of fibres or fibrous material. Also concerned is a thermoplastic material obtained after polymerization of the liquid composition. The invention also relates to a process for manufacturing such a liquid composition. The invention also relates to a process for impregnating a fibrous substrate of long fibres with said liquid composition. The invention also relates to a fibrous substrate impregnated with said liquid composition which is useful for manufacturing composite parts. The present invention also relates to a process for manufacturing mechanical parts or structural elements made of composite material and to mechanical parts or structural elements made of composite material obtained via a process using such a liquid composition.

The present disclosure provides an ethylene-based polymer. The ethylene-based polymer is formed from reacting, under polymerization conditions, ethylene monomer and bisallyl maleate (“BAIIM”). The present ethylene-based polymer with ethylene monomer and bisallyl maleate branching agent is interchangeably referred to as “BAIIM-PE.”

The present disclosure provides an ethylene-based polymer. The ethylene-based polymer is formed from reacting, under polymerization conditions, ethylene monomer and bisallyl maleate (“BAIIM”). The present ethylene-based polymer with ethylene monomer and bisallyl maleate branching agent is interchangeably referred to as “BAIIM-PE.”

Disclosed are styrenic polymers made by a mass or solution process, where the amount of trimer consisting of styrene and/or acrylonitrile is less than about 0.50 weight percent. Also disclosed is a method of minimizing the amount of trimer consisting of styrene and/or acrylonitrile in styrenic polymers made by a mass or solution process. The method includes the steps of lowering the temperature of the polymerization reaction mixture and including more than one initiator in the polymerization reaction mixture.

Disclosed are styrenic polymers made by a mass or solution process, where the amount of trimer consisting of styrene and/or acrylonitrile is less than about 0.50 weight percent. Also disclosed is a method of minimizing the amount of trimer consisting of styrene and/or acrylonitrile in styrenic polymers made by a mass or solution process. The method includes the steps of lowering the temperature of the polymerization reaction mixture and including more than one initiator in the polymerization reaction mixture.

Disclosed are styrenic polymers made by a mass or solution process, where the amount of trimer consisting of styrene and/or acrylonitrile is less than about 0.50 weight percent. Also disclosed is a method of minimizing the amount of trimer consisting of styrene and/or acrylonitrile in styrenic polymers made by a mass or solution process. The method includes the steps of lowering the temperature of the polymerization reaction mixture and including more than one initiator in the polymerization reaction mixture.

Provided is a method of preparing a copolymer which includes 1) initiating polymerization by batch-adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer to a reactor; and 2) performing polymerization by continuously adding an aromatic vinyl-based monomer to the reactor at a predetermined rate after the initiation of polymerization, wherein the continuous addition of the aromatic vinyl-based monomer is initiated when a polymerization conversion rate is 10% or less and terminated when a polymerization conversion rate is between 80 and 90%, and step 2) includes a first temperature phase and a second temperature phase, each of which maintains a constant temperature, wherein a temperature of the second temperature phase is higher than that of the first temperature phase, and thereby a copolymer with a small standard deviation for a vinyl cyan-based unit composition and excellent transparency may be prepared.

Provided is a method of preparing a copolymer which includes 1) initiating polymerization by batch-adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer to a reactor; and 2) performing polymerization by continuously adding an aromatic vinyl-based monomer to the reactor at a predetermined rate after the initiation of polymerization, wherein the continuous addition of the aromatic vinyl-based monomer is initiated when a polymerization conversion rate is 10% or less and terminated when a polymerization conversion rate is between 80 and 90%, and step 2) includes a first temperature phase and a second temperature phase, each of which maintains a constant temperature, wherein a temperature of the second temperature phase is higher than that of the first temperature phase, and thereby a copolymer with a small standard deviation for a vinyl cyan-based unit composition and excellent transparency may be prepared.