WO1996007694A1 - Recyclat enthaltende, expandierbare styrolpolymerisate - Google Patents
Recyclat enthaltende, expandierbare styrolpolymerisate Download PDFInfo
- Publication number
- WO1996007694A1 WO1996007694A1 PCT/EP1995/003283 EP9503283W WO9607694A1 WO 1996007694 A1 WO1996007694 A1 WO 1996007694A1 EP 9503283 W EP9503283 W EP 9503283W WO 9607694 A1 WO9607694 A1 WO 9607694A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polystyrene
- hydroxyethyl
- amines
- alkyl
- styrene polymers
- Prior art date
Links
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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
- C08J9/20—Making expandable particles by suspension polymerisation in the presence of the blowing agent
-
- 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
- C08F257/00—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00
- C08F257/02—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00 on to polymers of styrene or alkyl-substituted styrenes
-
- 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
- C08J2325/00—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
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
-
- 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
- C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
Definitions
- the invention relates to recyclable, expandable styrene polymers which can be processed into foams having an improved foam structure.
- Plastics based on styrene and copolymers containing styrene are produced in large quantities and used in many areas of technology. Foamed products are also very important.
- waste polystyrene foam or non-foamed polystyrene for the extrusion of polystyrene foam.
- the recyclate can be used both alone and in a mixture with fresh polystyrene.
- foams can be produced from the recyclates directly by gassing the polymer in the extruder and subsequent foaming to form sheets or by extrusion to give mini-granules which can be impregnated and foamed with blowing agent.
- a disadvantage of the polymerization of solutions of polystyrene recyclate in monomeric styrene is, in particular, that the foam structure of the foams produced using these styrene polymers is unsatisfactory. Especially when recyclates made from flame-retardant polystyrene types are processed.
- the object of the invention was to provide polystyrene containing recycled material, which has a uniform foam structure without undesired fine cell structure and good mechanical properties, and is easy to produce.
- the object was surprisingly achieved by adding alkyl di (2-hydroxyethyl) amines to the solution of polystyrene recyclate in vinyl aromatic monomers, in particular styrene, during the polymerization.
- the invention accordingly relates to expandable styrene polymers containing recycled polystyrene, to which alkyl-di (2-hydroxyethyl) amines are added during the polymerization.
- the polystyrene recyclate content in the products according to the invention is 10 to 50% by weight, based on the total weight of the polystyrene.
- the alkyl-di (2-hydroxyethyl) amines are added to the recyclate-containing polystyrene in an amount of 50 to 1000 ppm, preferably 50 to 500 ppm, based on the total batch of recyclate and monomer.
- the alkyl-di (2-hydroxyethyl) amines are preferably added only after the pearl size has been stabilized, that is to say after the suspension stabilizer has been added.
- C 12 / C 14 -alkyl-di (2-hydroxyethyl) -amine is used as the alkyl-di (2-hydroxyethyl) amine.
- This product is for example sold under the name Armostat ® 400 by Akzo.
- the alkyl-di (2-hydroxyethyl) amines are used together with a polyethylene wax.
- the polyethylene wax is preferably used in an amount of 500 to 1000 ppm.
- the polyethylene waxes used here generally have an average molecular weight (number average) of 2000 to 6000, vor ⁇ preferably from 2000 to 4000 and more preferably of 2500 particularly suitable to 3500.
- a polyethylene wax is the Luwax ® offered by BASF AG of average molecular weight (Number average) of 3000.
- the polyethylene waxes preferably have an average particle size of 5 to 50 ⁇ m. If the particles are too large, there are problems with the distribution in the polymer, and if the products are too fine, dust can be nuisance.
- Styrene is used in particular as the vinyl group-containing monomer. However, mixtures of styrene with other monomers containing vinyl groups can also be used.
- styrene content of at least 50% by weight of styrene.
- vinyl group-containing monomers are, for example, acrylonitrile, methylstyrene, ring-halogenated or ring-alkylated styrenes, esters of acrylic acid or methacrylic acid of alcohols with up to 8 carbon atoms, N-vinyl compounds, such as vinylcarbazole, or else small amounts of compounds which ent two polymerizable double bonds hold, such as butadiene, divinylbenzene or butadiene diacrylate.
- the styrene polymers can also contain customary additives to other substances which impart certain properties to the expandable products.
- flame retardants based on organic bromine or chlorine compounds, such as tris dibromopropyl phosphate, hexabromocyclododecane, chlorinated paraffin, and synergists for flame retardants such as dicumyl and highly decomposable organic peroxides; also antistatic agents, stabilizers, dyes, lubricants, fillers and substances which have an anti-adhesive effect when foaming, such as zinc stearate, melamine-formaldehyde condensates or silica, and agents for shortening the mold release time when foaming, such as glycerol esters or hydroxycarboxylic acid esters.
- the additives may vary depending on the
- SPARE BLADE RULE 26 intended effect homogeneously distributed in the particles or present as a surface coating.
- the dry and optionally pre-compressed polystyrene recyclate is first dissolved in the vinyl group-containing monomers.
- the dissolution takes place preferably at room temperature.
- the solution is advantageously subjected to filtration before the polymerization.
- the polymerization is carried out according to the suspension polymerization process.
- the solution of the polystyrene recyclate in the monomers is transferred to the reaction kettle containing the aqueous phase and the polymerization is carried out there.
- the suspension polymerization is generally carried out in the presence of suspension stabilizers and customary styrene-soluble polymerization catalysts.
- the blowing agent is generally added during the polymerization. However, it is also possible to introduce the blowing agent into the styrene polymer in a subsequent process step.
- the expandable styrene polymer beads are expanded in a known manner by heating to temperatures above their softening point, for example with hot air or preferably with steam.
- the foam particles obtained can be foamed further by cooling and, if appropriate, intermediate storage by heating again. Finally, they can be welded in a known manner into moldings in non-gas-tight forms.
- the polystyrene foams according to the invention are distinguished from other polystyrene foams containing recyclate by a uniform foam structure. Even minor impurities due to other polymers and additives in the recyclate, which are not removed from the recyclate by the usual cleaning processes can have no adverse effects on the foam structure of the products according to the invention.
- Foamed and unfoamed polystyrene waste which has different material properties and also partly different additives, can also be processed to high-quality foams using a very simple process, even outside the actual production process.
- the invention is illustrated by the following examples:
- a mixture of 19.5 kg of fully demineralized water, 19.5 g of Na ⁇ P 2 ⁇ and 52.7 g of MgSO / j was placed in a pressure-resistant 50 1 stirred tank made of stainless steel.
- 17 kg of a solution of the amount of polystyrene recyclate given in the table in styrene, 17 g of dibenzoyl peroxide and 51 g of dicumyl peroxide were introduced.
- the mixture was heated from 25 to 100 ° C. in the course of 2 h and then from 100 to 130 ° C. in the course of 5 h.
- the mixture was kept at 130 ° C. for a further 3 h.
- the beads obtained were centrifuged off, dried in countercurrent with cold air and coated with 0.1% by weight, based on the weight of the uncoated beads, of ethylene-bis-stearic acid amide.
- the bead size fraction 0.70 to 1.00 mm was then sieved out and 0.5% by weight, based on the styrene polymers containing blowing agent, of a mixture of 40% by weight of tristearyl citrate, 50% by weight of glycerol monostearate and 10% by weight of silica FK 320 (from Goldschmidt) coated.
- REPLACEMENT BLA ⁇ (RULE 26) The exact proportions of the starting materials and the properties of the foams are summarized in Table 1.
- the polystyrene recyclate had a viscosity number of 60 g / ml, a toluene-insoluble residue of 0.2% by weight and a residue after ashing of 0.05% by weight, based in each case on the weight of the recyclate.
- the number of cells and the cell structure were determined visually.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59505004T DE59505004D1 (de) | 1994-09-02 | 1995-08-17 | Recyclat enthaltende, expandierbare styrolpolymerisate |
JP8509155A JPH10508618A (ja) | 1994-09-02 | 1995-08-17 | リサイクル材料を含有する発泡性スチレンポリマー |
AU33858/95A AU3385895A (en) | 1994-09-02 | 1995-08-17 | Expandable styrene polymers containing recyclate |
US08/793,457 US5698603A (en) | 1994-09-02 | 1995-08-17 | Expandable styrene polymers containing recycled material |
EP95930492A EP0778860B1 (de) | 1994-09-02 | 1995-08-17 | Recyclat enthaltende, expandierbare styrolpolymerisate |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4431211A DE4431211A1 (de) | 1994-09-02 | 1994-09-02 | Recyclat enthaltende, expandierbare Styrolpolymerisate |
DEP4431211.3 | 1994-09-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996007694A1 true WO1996007694A1 (de) | 1996-03-14 |
Family
ID=6527208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1995/003283 WO1996007694A1 (de) | 1994-09-02 | 1995-08-17 | Recyclat enthaltende, expandierbare styrolpolymerisate |
Country Status (8)
Country | Link |
---|---|
US (1) | US5698603A (de) |
EP (1) | EP0778860B1 (de) |
JP (1) | JPH10508618A (de) |
AT (1) | ATE176262T1 (de) |
AU (1) | AU3385895A (de) |
CA (1) | CA2198782A1 (de) |
DE (2) | DE4431211A1 (de) |
WO (1) | WO1996007694A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999048956A1 (de) * | 1998-03-24 | 1999-09-30 | Basf Aktiengesellschaft | Verfahren zur herstellung wasserexpandierbarer recyclat enthaltender styrolpolymerisate |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19645948A1 (de) * | 1996-11-07 | 1998-05-14 | Basf Ag | Kontinuierliches Verfahren zur Herstellung von expandierbaren Styrolpolymeren |
DE19819058C5 (de) * | 1998-04-29 | 2015-06-25 | Basf Se | Verfahren zur Herstellung von vorgeschäumten EPS-Partikeln mit grober Schaumstruktur aus teilchenförmigen, schwach angeschäumten, expandierten Styrolpolymerisaten |
MY143939A (en) * | 2006-03-07 | 2011-07-29 | Basf Se | Process for preparing expandable styrene polymers |
US20140364524A1 (en) * | 2011-12-21 | 2014-12-11 | Basf Se | Method for producing expandable styrene polymers containing graphite and flame retardant |
KR101687914B1 (ko) | 2014-11-26 | 2016-12-19 | 주식회사 엘지화학 | 분산제를 포함하는 공역디엔계 중합체 고무 조성물 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2104867A1 (de) * | 1971-02-03 | 1972-08-17 | Basf Ag | Feinteihge, expandierbare Styrol polymerisate zur Herstellung gut ver schweißter und formbeständiger Formkörper |
US5269948A (en) * | 1990-10-22 | 1993-12-14 | Mobil Oil Corporation | Decontamination of polystyrene |
-
1994
- 1994-09-02 DE DE4431211A patent/DE4431211A1/de not_active Withdrawn
-
1995
- 1995-08-17 CA CA002198782A patent/CA2198782A1/en not_active Abandoned
- 1995-08-17 DE DE59505004T patent/DE59505004D1/de not_active Expired - Lifetime
- 1995-08-17 AU AU33858/95A patent/AU3385895A/en not_active Abandoned
- 1995-08-17 JP JP8509155A patent/JPH10508618A/ja active Pending
- 1995-08-17 US US08/793,457 patent/US5698603A/en not_active Expired - Fee Related
- 1995-08-17 EP EP95930492A patent/EP0778860B1/de not_active Expired - Lifetime
- 1995-08-17 WO PCT/EP1995/003283 patent/WO1996007694A1/de active IP Right Grant
- 1995-08-17 AT AT95930492T patent/ATE176262T1/de not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2104867A1 (de) * | 1971-02-03 | 1972-08-17 | Basf Ag | Feinteihge, expandierbare Styrol polymerisate zur Herstellung gut ver schweißter und formbeständiger Formkörper |
US5269948A (en) * | 1990-10-22 | 1993-12-14 | Mobil Oil Corporation | Decontamination of polystyrene |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999048956A1 (de) * | 1998-03-24 | 1999-09-30 | Basf Aktiengesellschaft | Verfahren zur herstellung wasserexpandierbarer recyclat enthaltender styrolpolymerisate |
Also Published As
Publication number | Publication date |
---|---|
EP0778860B1 (de) | 1999-01-27 |
DE4431211A1 (de) | 1996-03-07 |
CA2198782A1 (en) | 1996-03-03 |
US5698603A (en) | 1997-12-16 |
JPH10508618A (ja) | 1998-08-25 |
DE59505004D1 (de) | 1999-03-11 |
ATE176262T1 (de) | 1999-02-15 |
AU3385895A (en) | 1996-03-27 |
EP0778860A1 (de) | 1997-06-18 |
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