GB766585A - Improvements relating to polystyrene plastic materials - Google Patents

Improvements relating to polystyrene plastic materials

Info

Publication number
GB766585A
GB766585A GB1796654A GB1796654A GB766585A GB 766585 A GB766585 A GB 766585A GB 1796654 A GB1796654 A GB 1796654A GB 1796654 A GB1796654 A GB 1796654A GB 766585 A GB766585 A GB 766585A
Authority
GB
United Kingdom
Prior art keywords
per cent
styrene
butyl
polystyrene
natural
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
GB1796654A
Inventor
Frank Long
Norman Edgar Williams
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.)
Monsanto Chemicals Ltd
Original Assignee
Monsanto Chemicals Ltd
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 Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to GB1796654A priority Critical patent/GB766585A/en
Priority to FR1133954D priority patent/FR1133954A/en
Priority to DEM27430A priority patent/DE1056373B/en
Publication of GB766585A publication Critical patent/GB766585A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
    • C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
    • 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
    • C08F291/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00
    • C08F291/02—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00 on to elastomers

Abstract

Polystyrene of improved impact strength and flexibility is obtained by polymerizing a 25 per cent solution in styrene of a vulcanizable natural or synthetic rubber, by heating in three stages (a) at 80 DEG to 110 DEG C. to 20 to 40 per cent conversion of styrene to polystyrene; (b) at a temperature reduced by 3 DEG to 10 DEG C. to a 40 to 60 per cent conversion, and (c) at 170 DEG to 200 DEG C. until the polymerization is complete. The rubber may be a natural pale crepe or a cold butadiene-styrene copolymer. To improve heat dissipation as the viscosity increases the mass may be transferred, e.g. at 5 to 5 per cent conversion, to smaller containers having a relatively large surface areavolume ratio. Catalysts, e.g. benzoyl and dit-butyl peroxides, and t-butyl perbenzoate; lubricants, e.g. butyl stearate, and modifiers such as dodecyl mercaptan may be present. The polymerization may be carried out with agitation and in a non-oxidizing atmosphere. The product may be crushed or extruded and chopped into pieces suitable for moulding.ALSO:Polystyrene of improved physical properties is obtained by polymerising a solution in the styrene of up to 25 per cent by weight of the styrene, of a vulcanizable natural or synthetic rubber by heating in three stages (a) at 80 DEG C. to 110 DEG C. to a 20 to 40 per cent conversion of styrene to polystyrene, (b) at a temperature reduced by 3 to 10 DEG C. to a 40 to 60 per cent conversion and (c) at 170 DEG to 200 DEG C. until the polymerisation is complete. The rubber may be a natural pale crepe. Since the viscosity increases as polymerisation proceeds the mass may be transferred at an intermediate stage to smaller containers having a relatively large surface area-volume ratio. Catalysts, e.g. di-t-butyl and benzoyl peroxide, and t-butyl perberzoate; lubricants e.g. butyl stearate, and modifiers such as dodecyl mercaptan may be present and the reaction may be performed in a non oxidizing atmosphere.
GB1796654A 1954-06-18 1954-06-18 Improvements relating to polystyrene plastic materials Expired GB766585A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1796654A GB766585A (en) 1954-06-18 1954-06-18 Improvements relating to polystyrene plastic materials
FR1133954D FR1133954A (en) 1954-06-18 1955-06-16 Improvements to polystyrene-based plastics
DEM27430A DE1056373B (en) 1954-06-18 1955-06-16 Process for the production of new types of plastics from polystyrene and natural or synthetic rubber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1796654A GB766585A (en) 1954-06-18 1954-06-18 Improvements relating to polystyrene plastic materials

Publications (1)

Publication Number Publication Date
GB766585A true GB766585A (en) 1957-01-23

Family

ID=10104323

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1796654A Expired GB766585A (en) 1954-06-18 1954-06-18 Improvements relating to polystyrene plastic materials

Country Status (3)

Country Link
DE (1) DE1056373B (en)
FR (1) FR1133954A (en)
GB (1) GB766585A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957833A (en) * 1958-03-31 1960-10-25 Foster Grant Co Inc Method of making a moldable composition from styrene and a styrene-rubber interpolymer
US3068191A (en) * 1956-11-28 1962-12-11 Shell Oil Co Product and process for preparing rubber containing vinyl crosslinked styrene resin of high impact strength
US3144420A (en) * 1961-12-18 1964-08-11 Koppers Co Inc High impact polystyrene

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE584055A (en) * 1958-10-29
NL256962A (en) * 1959-12-24
DE1180943B (en) * 1960-01-25 1964-11-05 Shell Int Research Process for the production of highly impact-resistant moldable masses
IT648973A (en) * 1960-02-27
US3945976A (en) * 1968-09-30 1976-03-23 Standard Oil Company Process for producing impact resistant polymer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE520039A (en) * 1950-08-25

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068191A (en) * 1956-11-28 1962-12-11 Shell Oil Co Product and process for preparing rubber containing vinyl crosslinked styrene resin of high impact strength
US2957833A (en) * 1958-03-31 1960-10-25 Foster Grant Co Inc Method of making a moldable composition from styrene and a styrene-rubber interpolymer
US3144420A (en) * 1961-12-18 1964-08-11 Koppers Co Inc High impact polystyrene

Also Published As

Publication number Publication date
DE1056373B (en) 1959-04-30
FR1133954A (en) 1957-04-04

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