GB742803A - Improvements in or relating to foamed synthetic resins - Google Patents
Improvements in or relating to foamed synthetic resinsInfo
- Publication number
- GB742803A GB742803A GB5464/53A GB546453A GB742803A GB 742803 A GB742803 A GB 742803A GB 5464/53 A GB5464/53 A GB 5464/53A GB 546453 A GB546453 A GB 546453A GB 742803 A GB742803 A GB 742803A
- Authority
- GB
- United Kingdom
- Prior art keywords
- foamed
- mass
- granules
- resin
- beating
- 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
- C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
A mass of resin is foamed by the action of a foaming agent to produce a mass that will not substantially expand on subsequent extrusion and is in a partly hardened state. This foamed mass is then extruded through one or more orifices and reduced to granules, and the granules are heated until they are substantially completely hardened. The foamed resin may be made by beating an acid catalyst with an acid-resisting foaming agent, e.g. an alcohol sulphonate, to form a stiff foam and beating urea formaldehyde or cold-setting phenolic resin into the foam. To suppress the odour of formalin, very fine sawdust or proteins may be added to the foamed mass. The heating may be by hot air, with or without infra-red or high-frequency heating. The reduction to granules may be effected by rotating discs or jets of fluid. The hardened granules may be made non-inflammable by adding thereto heavy metal salts, gypsum or waterglass; or may be protectively coated with bitumen pitch; or may be mixed with water and cement or cement-sand mixture to make light-weight bricks; or may be mixed with a cold-hardening synthetic resin and a catalyst, and shaped or poured into insulation cavities.ALSO:A mass of resin is foamed by the action of a foaming agent to produce a mass that will not substantially expand on subsequent extrusion and is in a partly hardened state. This foamed mass is then extruded through one or more orifices and reduced to granules, and the granules are heated until they are substantially completely hardened. The foamed resin may be made by beating an acid catalyst with an acid-resisting foaming agent, e.g. an alcohol sulphonate, to form a stiff foam and beating urea formaldehyde or cold-setting phenolic resin into the foam. To suppress the odour of formalin, very fine sawdust or proteins may be added to the foamed mass. The heating may be by hot air, with or without infra-red or high-frequency heating. The reduction to granules may be effected by rotating discs or jets of fluid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH742803X | 1952-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB742803A true GB742803A (en) | 1956-01-04 |
Family
ID=4533286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5464/53A Expired GB742803A (en) | 1952-02-26 | 1953-02-26 | Improvements in or relating to foamed synthetic resins |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB742803A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3238155A (en) * | 1961-12-04 | 1966-03-01 | Dow Chemical Co | Addition of melamine-formaldehyde to magnesium oxycement to improve the resistance to the passage of water of said cement |
| US3257338A (en) * | 1963-02-20 | 1966-06-21 | Koppers Co Inc | Concrete composition comprising cement, primary aggregate, particulate expanded polystyrene and a homogenizing agent |
| US3336184A (en) * | 1962-01-26 | 1967-08-15 | Basf Ag | Composite expanded plastics |
-
1953
- 1953-02-26 GB GB5464/53A patent/GB742803A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3238155A (en) * | 1961-12-04 | 1966-03-01 | Dow Chemical Co | Addition of melamine-formaldehyde to magnesium oxycement to improve the resistance to the passage of water of said cement |
| US3336184A (en) * | 1962-01-26 | 1967-08-15 | Basf Ag | Composite expanded plastics |
| US3257338A (en) * | 1963-02-20 | 1966-06-21 | Koppers Co Inc | Concrete composition comprising cement, primary aggregate, particulate expanded polystyrene and a homogenizing agent |
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