GB849117A - Improvements in or relating to polymeric cellular products - Google Patents
Improvements in or relating to polymeric cellular productsInfo
- Publication number
- GB849117A GB849117A GB7305/57A GB730557A GB849117A GB 849117 A GB849117 A GB 849117A GB 7305/57 A GB7305/57 A GB 7305/57A GB 730557 A GB730557 A GB 730557A GB 849117 A GB849117 A GB 849117A
- Authority
- GB
- United Kingdom
- Prior art keywords
- particles
- hydrocarbon
- density
- per cubic
- less
- 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
- C08J9/228—Forming foamed products
-
- 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
-
- 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
Polystyrene foam having a density of less than one per cubic foot is prepared by contacting polystyrene particles containing 4-15% by weight of an aliphatic hydrocarbon boiling within the range of 25 DEG -100 DEG C. with steam at a pressure of 5-30 p.s.i.g. and a temperature of 109 DEG to 134 DEG C. for 5-30 seconds, volatilising a portion of the hydrocarbon and expanding the particles into discreet particles having a density of less than one pound per cubic foot, and heating the discreet particles to volatilise the remaining hydrocarbon, e.g. in a mould, to form an integral foam. Specified hydrocarbons are petroleum ethers, pentane, hexane, heptane, octane, dimethylpentane, iso-octane, cyclopentane and cyclopentadiene. In the impregnation of the particles with the hydrocarbon, dispersing agents, such as difficulty-soluble phosphates, polyvinyl alcohol and calcium carbonate, may be used. Specifications 690,214, 715,100, 756,654 and 815,386 are referred to.ALSO:Polystyrene foam having a density of less than one pound per cubic foot is prepared by contacting polystyrene particles containing 4-15% by weight of an aliphatic hydrocarbon boiling within the range of 25 DEG -100 DEG C. with steam at a pressure of 5-30 p.s.i.g. and a temperature of 109 DEG to 134 DEG C. for 5-30 seconds, volatilising a portion of the hydrocarbon and expanding the particles into discreet particles having a density of less than one pound per cubic foot, and heating the discreet particles to volatilise the remaining hydrocarbon, e.g. in a mould, to form an integral foam. Specified hydrocarbons are petroleum ethers, pentane, hexane, heptane, octane, dimethylpentane, isooctane, cyclopentane and cyclopentadiene. In the impregnation of the particles with the hydrocarbon, dispersing agents, such as difficulty-soluble phosphates, polyvinyl alcohol and calcium carbonate may be used. Specifications 690,214, 715,100, 756,654 and 815,386 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US849117XA | 1956-03-13 | 1956-03-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB849117A true GB849117A (en) | 1960-09-21 |
Family
ID=22187981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7305/57A Expired GB849117A (en) | 1956-03-13 | 1957-03-05 | Improvements in or relating to polymeric cellular products |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE555694A (en) |
FR (1) | FR1172912A (en) |
GB (1) | GB849117A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3800018A (en) * | 1965-04-15 | 1974-03-26 | Saint Gobain | Fabrication of cellular resinous products |
-
0
- BE BE555694D patent/BE555694A/xx unknown
-
1957
- 1957-03-05 GB GB7305/57A patent/GB849117A/en not_active Expired
- 1957-03-09 FR FR1172912D patent/FR1172912A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3800018A (en) * | 1965-04-15 | 1974-03-26 | Saint Gobain | Fabrication of cellular resinous products |
Also Published As
Publication number | Publication date |
---|---|
BE555694A (en) | |
FR1172912A (en) | 1959-02-17 |
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