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-foamingInfo
- 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
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.
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)
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 |
-
1970
- 1970-12-23 DE DE19702063504 patent/DE2063504A1/en active Pending
-
1971
- 1971-12-15 FR FR7145053A patent/FR2119426A5/en not_active Expired
- 1971-12-22 CA CA130890A patent/CA918350A/en not_active Expired
Cited By (1)
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 |