FR2119426A5 - Expandable polystyrene particles - coated with a melamine - formaldehyde condensate to prevent agglomeration during pre-foaming - Google Patents

Expandable polystyrene particles - coated with a melamine - formaldehyde condensate to prevent agglomeration during pre-foaming

Info

Publication number
FR2119426A5
FR2119426A5 FR7145053A FR7145053A FR2119426A5 FR 2119426 A5 FR2119426 A5 FR 2119426A5 FR 7145053 A FR7145053 A FR 7145053A FR 7145053 A FR7145053 A FR 7145053A FR 2119426 A5 FR2119426 A5 FR 2119426A5
Authority
FR
France
Prior art keywords
melamine
coated
formaldehyde condensate
foaming
particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR7145053A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Application granted granted Critical
Publication of FR2119426A5 publication Critical patent/FR2119426A5/en
Expired legal-status Critical Current

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
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/224—Surface treatment
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The particles are coated with 0.005 - 0.1 wt.% of a melamine-formaldehyde condensate. This coating, unlike prior art coatings of silicon oil or thermoplastic synthetics contg. hydrophilic gps.,., does not hinder the final foaming operation inside a mould so that the particles are evenly welded together. The particles of polystyrene or copolymers of styrene with e.g. alpha-methyl-styrene, acrylonitrile, N-vinyl cpds. contg. >=95 wt.% styrene are of 0.4 - 3 mm. dia. and contain a hydrocarbon propellant.
FR7145053A 1970-12-23 1971-12-15 Expandable polystyrene particles - coated with a melamine - formaldehyde condensate to prevent agglomeration during pre-foaming Expired FR2119426A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702063504 DE2063504A1 (en) 1970-12-23 1970-12-23 Expandable finely divided styrene polymers

Publications (1)

Publication Number Publication Date
FR2119426A5 true FR2119426A5 (en) 1972-08-04

Family

ID=5792039

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7145053A Expired FR2119426A5 (en) 1970-12-23 1971-12-15 Expandable polystyrene particles - coated with a melamine - formaldehyde condensate to prevent agglomeration during pre-foaming

Country Status (3)

Country Link
CA (1) CA918350A (en)
DE (1) DE2063504A1 (en)
FR (1) FR2119426A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995005414A1 (en) * 1993-08-16 1995-02-23 Shell Internationale Research Maatschappij B.V. Beads of a polymer of a vinylaromatic compound

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995005414A1 (en) * 1993-08-16 1995-02-23 Shell Internationale Research Maatschappij B.V. Beads of a polymer of a vinylaromatic compound

Also Published As

Publication number Publication date
CA918350A (en) 1973-01-02
DE2063504A1 (en) 1972-07-06

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Legal Events

Date Code Title Description
ST Notification of lapse