The invention relates to novel cyclic and open-chain hydroxylamine esters and polymerizable compositions comprising these hydroxylamine esters and an ethylenically unsaturated monomer or oligomer. The invention also relates to use as polymerization initiators and to the use of known hydroxylamine esters selected from the group consisting of HALS compounds and the novel hydroxylamine esters for the controlled degradation of polypropylene and for achieving a controlled increase in the molecular weight of polyethylene.
Reactor for Preparing Organic Peroxides Via the Intermediate of a Solid Hydroperoxide
申请人:Appel Hans
公开号:US20090187048A1
公开(公告)日:2009-07-23
A reactor which comprises a vessel (
1
) with a vessel bottom (
2
), a stirrer (
3
) arranged in the vessel, an emergency discharge valve (
4
) arranged in the vessel bottom for emptying the reactor in less than 600 seconds and at least one filtration device (
5
) arranged in the vessel bottom is suitable for the safe preparation of organic peroxides. The process for preparing an organic peroxide comprises the steps of preparing a solid hydroperoxide in the form of a suspension in the reactor, filtering the suspension through the filtration device (
5
) arranged in the vessel bottom (
2
) while retaining the solid hydroperoxide in the reactor and reacting the hydroperoxide with an alkylating agent, an acylating agent or a carbonyl compound.
Method for Controlled Free Radical Polymerization or Copolymerization of Methacrylic and/or Methacrylate Monomers or Exclusively Methacrylic and/or Methacrylate Copolymers
申请人:Couturier Jean-Luc
公开号:US20080274074A1
公开(公告)日:2008-11-06
The invention relates to a method for the polymerization of one or more methacrylate and/or methacrylic monomers, for the synthesis of methacrylate or methacrylic polymers or of exclusively methacrylic and/or methacrylate copolymers, comprising a step of bringing said monomer(s) into contact with one at least of the compounds of formula (I) and (II) below:
in which:
R
1
and R
2
may represent a phenyl group, R
3
and R
4
may together form an ═N-phenyl group, Z represents a group of formula —CR
8
R
9
R
10
, in which R
8
and R
9
may represent methyl groups and R
10
may represent a —COO-phenyl group.
COSMETIC PREPARATIONS BASED ON MOLECULARLY IMPRINTED POLYMERS
申请人:Wendel Volker
公开号:US20100048737A1
公开(公告)日:2010-02-25
The present invention relates to cosmetic or dermatological formulations comprising at least one active compound, at least one polymer which is molecularly imprinted in the presence of this active compound and at least one fatty phase.
Process for the controlled increase in the molecular weight of polyethylenes
申请人:Roth Michael
公开号:US20060128903A1
公开(公告)日:2006-06-15
The invention relates to novel cyclic hydroxylamine esters and to the use of known hydroxylamine esters selected from the group consisting of HALS (sterically hindered amine) compounds and the novel hydroxylamine esters achieving a controlled increase in the molecular weight of polyethylene.