Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J3/00—Processes of treating or compounding macromolecular substances
  • C08J3/20—Compounding polymers with additives, e.g. colouring
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/06—Rod-shaped
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
  • C08C19/00—Chemical modification of rubber
  • C08C19/12—Incorporating halogen atoms into the molecule
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
  • C08C2/00—Treatment of rubber solutions
  • C08C2/02—Purification
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F6/00—Post-polymerisation treatments
  • C08F6/001—Removal of residual monomers by physical means
  • C08F6/003—Removal of residual monomers by physical means from polymer solutions, suspensions, dispersions or emulsions without recovery of the polymer therefrom
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F6/00—Post-polymerisation treatments
  • C08F6/06—Treatment of polymer solutions
  • C08F6/10—Removal of volatile materials, e.g. solvents
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J3/00—Processes of treating or compounding macromolecular substances
  • C08J3/005—Processes for mixing polymers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L15/00—Compositions of rubber derivatives
  • C08L15/02—Rubber derivatives containing halogen
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
  • C08L23/28—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment by reaction with halogens or halogen-containing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2300/00—Characterised by the use of unspecified polymers
  • C08J2300/10—Polymers characterised by the presence of specified groups, e.g. terminal or pendant functional groups
  • C08J2300/102—Polymers characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing halogen atoms
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
  • C08J2353/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
  • C08J2425/02—Homopolymers or copolymers of hydrocarbons
  • C08J2425/04—Homopolymers or copolymers of styrene
  • C08J2425/06—Polystyrene

Definitions

• Another problem is that the viscosity of the brominated polymer increases very substantially as solvent is removed.
• the high viscosity makes the polymer difficult to handle and limits the types of processing methods that can be used.
• various types of solvent flashing equipment such as wiped film evaporators or falling film evaporators, can be used only to remove a small portion of the solvent, if at all. If too much solvent is removed in this equipment, the remaining highly viscous solution tends to coat the surfaces of the evaporator, where the brominated polymer becomes subjected to high temperatures and/or long residence times and degrades.
• the high viscosity of the concentrated solution causes residence times to be long and operating rates to be correspondingly slow.
• flashing equipment may be useful for performing a preliminary concentrating step, but cannot be used to produce the final devolatilized product.
• thermoplastic polymer can be selected with the end-use application in mind. For example, if the brominated polymer is to be used as a flame retardant for a particular type of polymer, a polymer of that particular type can be combined with the brominated polymer solution in step b) of the process to reduce the solvent concentration. Doing this can have additional benefits as well, such as making the brominated polymer more readily dispersible into other polymers (and thus facilitating the production of flame-retardant polymer blends).
• the characteristics of the second thermoplastic organic polymer can be selected so that desirable conditions, especially moderate operating temperatures that allow the brominated organic polymer to be processed with minimal loss of bromine, can be maintained in the devolatilizing extruder.
• Yet another advantage of the invention is that it affords a convenient and inexpensive means for incorporating various other materials into the devolatilized polymer blend.
• materials include thermal stabilizers, which not only can help prevent thermal degradation during the devolatilization extrusion step but remain in the devolatilized product and therefore can provide stabilization in subsequent downstream melt-processing operations as well.
• Other materials that can be incorporated into the devolatilized polymer blend in this process are described below.
• the extruder screw(s) may additionally contain reversing elements or non- pumping barrier elements located at one or more points along its length.
• the reverse elements are sometimes referred to as "left-hand” elements while non-pumping barrier elements are sometimes called neutral kneading disc block elements or blister rings.
• Elements of these types produce localized forces on the polymer mixture in the upstream direction, i.e. in the direction opposite of the mass flow of polymeric materials through the extruder barrel. These elements in some cases provide mixing within the extruder barrel, and can serve to control the flow of materials through the barrel.
• a preferred devolatilizing extruder contains, in order from the upstream end to the downstream end, at least one upstream inlet port through which some or all of the second thermoplastic polymer is introduced; at least one back vent; at least one main inlet port through which the brominated polymer solution or combination thereof with a portion of the second thermoplastic polymer is introduced, one or more forward vents, and an outlet through which the devolatilized polymer blend is removed from the devolatilizing extruder.
• Such a preferred devolatilizing extruder preferably also contains one or more inlets for introducing a stripping agent, located downstream of the inlet ports and upstream of at least the last of the vents.
• Equation (II) Specific mechanical energy input (SEI) can be estimated using Equation (II) as below.
• the alkyl phosphite compound contains at least one
• a preferred alkyl phosphite is a pentaerythritol diphosphite compound, materials have the st
• the organotin compounds include, for example, alkyl tin thioglycolates, alkyl tin mercaptopropionates, alkyl tin mercaptides, alkyl tin maleates and alkyl tin (alkylmaleates), wherein the alkyls are selected from methyl, butyl and octyl.
• a brominated polymer solution is prepared by dissolving 22.5 parts of a brominated styrene-butadiene polymer in 50 parts of dibromomethane. This solution simulates a borminated polymer solution obtained from the bromination of a starting styrene-butadiene polymer. This solution is processed through a tandem devolatilization extrusion line to first blend it with a second thermoplastic polymer and a thermal stabilization package, and then to devolatilize the resulting blend.
• the devolatilized polymer blend contains less than 200 ppm residual solvent. It contains 25% by weight bromine. It has a 5% weight loss temperature of 270°C.
• the number average molecular weight is 46,200, the weight average molecular weight is

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• Chemical & Material Sciences (AREA)
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• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Dispersion Chemistry (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
• Compositions Of Macromolecular Compounds (AREA)

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• 2012
  • 2012-09-14 EP EP12769548.4A patent/EP2736963B1/en active Active
  • 2012-09-14 JP JP2014533594A patent/JP6105596B2/ja active Active
  • 2012-09-14 IN IN2210CHN2014 patent/IN2014CN02210A/en unknown
  • 2012-09-14 US US14/240,861 patent/US9464175B2/en active Active
  • 2012-09-14 WO PCT/US2012/055489 patent/WO2013048785A1/en not_active Ceased
  • 2012-09-14 CN CN201280047049.1A patent/CN103890048B/zh active Active
• 2014
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