DE968973C - Process for the production of modified polystyrene - Google Patents

Process for the production of modified polystyrene

Info

Publication number
DE968973C
DE968973C DEC8299A DEC0008299A DE968973C DE 968973 C DE968973 C DE 968973C DE C8299 A DEC8299 A DE C8299A DE C0008299 A DEC0008299 A DE C0008299A DE 968973 C DE968973 C DE 968973C
Authority
DE
Germany
Prior art keywords
modified polystyrene
production
component
weight
parts
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
DEC8299A
Other languages
German (de)
Inventor
Dr Walter Franke
Dr Erwin Heinrich
Dr Paul Kraenzlein
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.)
Huels AG
Original Assignee
Chemische Werke Huels 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
Priority claimed from DEC7159A external-priority patent/DE968102C/en
Application filed by Chemische Werke Huels AG filed Critical Chemische Werke Huels AG
Priority to DEC8299A priority Critical patent/DE968973C/en
Application granted granted Critical
Publication of DE968973C publication Critical patent/DE968973C/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
    • C08F212/00—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
    • C08F212/02—Monomers containing only one unsaturated aliphatic radical
    • C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06—Hydrocarbons
    • C08F212/08—Styrene

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Graft Or Block Polymers (AREA)

Description

AUSGEGEBEN AM 10. APRIL 1958ISSUED APRIL 10, 1958

C 8299 IVb/3?cC 8299 IVb / 3? C

Zusatz zum Patent 968Addendum to patent 968

Gegenstand des Patents 968 102 ist ein Verfahren zur Herstellung von modifiziertem Polystyrol, nach dem man monomeres Styrol und eine in bezug auf Styrol geringere Menge einer monomeren polymerisierbaren zweiten Komponente durch Suspensionspolymerisation so zusammen polymerisiert, daß zuerst die eine monomere Komponente für sich allein zum überwiegenden Teil polymerisiert wird, dann die zweite monomere Komponente zugegeben und gemeinsam mit dem noch nicht polymerisieren Teil der ersten Komponente zu Ende polymerisiert wird. Es wurde nun gefunden, daß man dieses Verfahren noch weiter verbessern kann, wenn man bei der Verwendung von Styrol als erster Komponente zusammen mit einem Dien als zweiter Komponente einen Regler zusetzt.The subject of patent 968 102 is a process for the production of modified polystyrene, after one monomeric styrene and a smaller amount of styrene in relation to one monomeric polymerizable second component by suspension polymerization so together polymerized that first the one monomeric component on its own for the most part is polymerized, then the second monomeric component is added and together with the not yet polymerize Part of the first component is polymerized to the end. It has now been found that this process can be improved even further by using the use of styrene as the first component together with a diene as the second component adds a regulator.

Die Arbeitsbedingungen sind die gleichen, wie sie auch das Verfahren nach Patent 968 102 erfordert. Unter Reglern werden solche Verbindungen verstanden, die in der Lage sind, die Polymerisation der als zweite Komponente verwendeten Diene so zu regeln, daß keine unerwünschten Nebenreaktionen stattfinden, vor-The working conditions are the same as those required by the method of patent 968,102. Regulators are understood to mean those compounds which are capable of the polymerization of the second component used Serve to regulate in such a way that no undesired side reactions take place,

709 951/21709 951/21

zugsweise ζ. B. Diisopropylxanthogendisulfid. Polymerisiert man in Gegenwart von Reglern, so wird die KerbschlagzäHigkeit des erhaltenen modifizierten Polystyrols durch die gleiche Menge an Dienen wesentlich mehr verbessert als bei der Polymerisation in Abwesenheit von Reglern. Man ist dadurch in der Lage, die Butadienmenge im modifizierten Polystyrol so niedrig zu halten, daß keine unerwünschte Erniedrigung des Erweichungspunktes eintritt, ohne daß man deshalb auf eine gute Kerbschlagzähigkeit verzichten muß.preferably ζ. B. Diisopropylxanthogen disulfide. If you polymerize in the presence of regulators, so the impact strength of the modified polystyrene obtained by the same amount of Serving is much more improved than when polymerizing in the absence of regulators. One is thereby able to keep the amount of butadiene in the modified polystyrene so low that none undesired lowering of the softening point occurs without a good one Notched impact strength must do without.

Beispielexample

In einem druckfesten Kessel werden zu einer Lösung von 5 Gewichtsteilen Gelatine in 250 Gewichtsteilen Wasser 75 Gewichtsteile ,monomeres Styrol, die 0,17 Gewichtsteile Benzoylperoxyd gelöst enthalten, zugegeben. Dann polymerisiert man bei 86 bis 900 .10 Stunden lang unter lebhaftem Rühren. Nach dem Abkühlen auf 400 werden 25 Gewichtsteile Butadien-1,3 sowie 0,17 Gewichtsteile Benrzoylperoxyd und 0,15 Gewichtsteile Diisopropylxanthogendisulfid zugesetzt. Anschließend wird auf 85 bis 900 erhitzt und weitere 24 Stunden polymerisiert. Das erhaltene perlförmige Polymerisat wird mehrfach in Wasser gewaschen und bei 75 ° getrocknet. Es enthält etwa 10% Butadien. Die Kerbschlag- und Schlagzähigkeit daraus hergestellter Nofmenstäbe 55 X6X4mm betragen 12 und 40 cmkg/cm2. Der Erweichungspunkt liegt bei 900.In a pressure-tight kettle, 75 parts by weight of monomeric styrene containing 0.17 parts by weight of benzoyl peroxide in dissolved form are added to a solution of 5 parts by weight of gelatin in 250 parts by weight of water. Then polymerized at 86 to 90 0 .10 hours under vigorous stirring. After cooling to 40 0 25 parts by weight of 1,3-butadiene and 0.17 parts by weight and 0.15 parts by weight of diisopropyl Benrzoylperoxyd be added. Followed by heating to 85 to 90 0 and polymerized for a further 24 hours. The bead-like polymer obtained is washed several times in water and dried at 75 °. It contains about 10% butadiene. The notched impact strength and impact strength of Nofmen rods 55 × 6 × 4 mm produced therefrom are 12 and 40 cmkg / cm 2 . The softening point is 90 0 .

Polymerisiert man nach dem Verfahren des Patents 968 102 in Abwesenheit von Reglern, so muß das modifizierte Polystyrol etwa 17% Butadien enthalten, um die gleiche Kerbschlagzähigkeit zu ergeben. Der Erweichungspunkt dieses Polymerisats liegt dann bei 830.When polymerizing in the absence of regulators according to the method of patent 968,102, the modified polystyrene must contain about 17% butadiene in order to give the same notched impact strength. The softening point of this polymer is then 83 ° .

Claims (1)

PATENTANSPRUCH: +0 PATENT CLAIM: +0 Weiterbildung des Verfahrens nach Patent 968 102 zur Herstellung von modifiziertem Polystyrol durch Suspensionspolymerisation, dadurch gekennzeichnet, daß man bei der Verwendung von Styrol als erster Komponente zusammen mit einem Dien als zweiter Komponente einen Regler zusetzt.Further development of the method according to patent 968 102 for the production of modified Polystyrene by suspension polymerization, characterized in that when using adding a regulator of styrene as the first component together with a diene as the second component. In Betracht gezogene Druckschriften:Considered publications: Britische Patentschrift Nr. 682773;British Patent No. 682773; C. E. Schildknecht, »Vinyl and related polymers«, I. Wiley & Sons, New York (1952), S. 87 und 88;C. E. Schildknecht, "Vinyl and related polymers", I. Wiley & Sons, New York (1952), p. 87 and 88; »Angewandte Chemie«, 62 (1950), S. 493, linke Spalte, vorletzter Absatz;"Angewandte Chemie", 62 (1950), p. 493, left column, penultimate paragraph; »Die makromolekulare Chemie«, III (1949), S. 53 ff·"The macromolecular chemistry", III (1949), p. 53 ff · ©6095287602 5.56 (709 951/21 4.58)© 6095287602 5.56 (709 951/21 4.58)
DEC8299A 1953-02-19 1953-10-15 Process for the production of modified polystyrene Expired DE968973C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC8299A DE968973C (en) 1953-02-19 1953-10-15 Process for the production of modified polystyrene

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEC7159A DE968102C (en) 1953-02-19 1953-02-19 Process for the production of modified polystyrene
DEC8299A DE968973C (en) 1953-02-19 1953-10-15 Process for the production of modified polystyrene

Publications (1)

Publication Number Publication Date
DE968973C true DE968973C (en) 1958-04-10

Family

ID=25969076

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC8299A Expired DE968973C (en) 1953-02-19 1953-10-15 Process for the production of modified polystyrene

Country Status (1)

Country Link
DE (1) DE968973C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB682773A (en) * 1948-12-29 1952-11-19 Standard Oil Dev Co Rubber-like copolymers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB682773A (en) * 1948-12-29 1952-11-19 Standard Oil Dev Co Rubber-like copolymers

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