GB890909A - Process for the manufacture of foamed materials of artificial plastics - Google Patents

Process for the manufacture of foamed materials of artificial plastics

Info

Publication number
GB890909A
GB890909A GB17238/58A GB1723858A GB890909A GB 890909 A GB890909 A GB 890909A GB 17238/58 A GB17238/58 A GB 17238/58A GB 1723858 A GB1723858 A GB 1723858A GB 890909 A GB890909 A GB 890909A
Authority
GB
United Kingdom
Prior art keywords
acrylic acid
acid amide
polymerization
acrylonitrile
ferrous sulphate
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
GB17238/58A
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.)
Wacker Chemie AG
Original Assignee
Wacker Chemie 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
Application filed by Wacker Chemie AG filed Critical Wacker Chemie AG
Publication of GB890909A publication Critical patent/GB890909A/en
Expired legal-status Critical Current

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
    • C08J9/02—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by the reacting monomers or modifying agents during the preparation or modification of macromolecules
    • 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
    • C08J2333/00—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers

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)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

Foamed polyacrylic acid amide is manufactured by polymerizing p the acrylic acid amide either alone or jointly with at most 70% by weight, calculated on the total weight of monomers, of acrylonitrile, acrylic acid or styrene, in acid aqueous solution in the presence of a polymerization catalyst, e.g. ammonium persulphate, either at a pH value within the range of 4 to 7 at a temperature of 50 DEG to 110 DEG C., or at a degree of acidity ranging from that of sulphuric acid of 0,0005% strength to that of 60% strength, at a temperature of 20 DEG to 110 DEG C., the polymerization product is pressed under heat and pressure, after removal of water and acid, to form a homogeneous melt and the pressed mass is expanded by heating it at a temperature of 150 DEG -240 DEG C. The polymerization is preferably conducted in the presence of 0,01 to 15% by weight of the acrylic acid amide of a compound of iron, chromium, vanadium, titanium or manganese. Polyvinyl alcohol may be added to control the speed of the polymerization. According to an Example (2) to 1 part acrylic acid amide dissolved in 1 part water there was added 0,1 part polyvinyl alcohol, sufficient glacial acetic acid to give a pH of 4 and 0,007 part ferrous sulphate; 0,01 part ammonium persulphate was then gradually added at 50 DEG C. The rubber-like polymer obtained was treated with methanol, dried and moulded at 120 DEG C. under a pressure of 75 kgs./sq. cm. to form a moulded article which was then heated for 30 minutes at 230 DEG C. to form a foamed material. In other examples polymers were produced in the presence of ammonium persulphate and ferrous sulphate from (6) 1 part acrylic acid amide and 0,43 part acrylonitrile, (7) 1 part acrylic acid amide and 0,11 part styrene, (8) and (10) 1 part acrylic acid amide, 0,11 part acrylic acid and 0,48 part acrylonitrile, (9) 1 part acrylic acid amide, 0,43 part acrylonitrile and 0,075 part acrylic acid. While in certain other examples polymerization was conducted in the presence of ammonium persulphate and (11) iron and chromium sulphates, (12) ammonium vanadate, (13) manganese carbonate, (14) ferrous sulphate and ammonium vanadate and (15) ferrous sulphate and titanyl sulphate.ALSO:Foamed polyacrylic acid amide is manufactured by polymerizing the acrylic acid amide either alone or jointly with at most 70% by weight, calculated on the total weight of monomers, of acrylonitrile, acrylic acid or styrene, in acid aqueous solution in the presence of a polymerization catalyst, e.g. ammonium persulphate, either at a pH value within the range of 4 to 7 at a temperature of 50 DEG to 110 DEG C., or at a degree of acidity ranging from that of sulphuric acid of 0,0005% strength to that of 60% strength, at a temperature of 20 DEG to 110 DEG C., the polymerization product is pressed under heat and pressure, after removal of water and acid, to form a homogeneous melt and the pressed mass is expanded by heating it at a temperature of 150-240 DEG C. The polymerization is preferably conducted in the presence of 0,01 to 15% by weight of the acrylic acid amide of a compound of iron, chromium, vanadium, titanium or manganese. Polyvinyl alcohol may be added to control the speed of the polymerization. According to an Example (2) to 1 part acrylic acid amide dissolved in 1 part water there was added 0,1 part polyvinyl alcohol sufficient glacial acetic acid to give a pH of 4, and 0,007 part ferrous sulphate; 0,01 part ammonium persulphate was then gradually added at 50 DEG C. The rubber-like polymer obtained was treated with methanol, dried and moulded at 120 DEG C. under a pressure of 75 kgs/sq. cm. to form a moulded article which was then heated for 30 minutes at 230 DEG C. to form a foamed material. In other examples, polymers were produced in the presence of ammonium persulphate and ferrous sulphate from (6) 1 part acrylic acid amide and 0,43 part acrylonitrile, (7) 1 part acrylic acid amide and 0,11 part styrene, (8 and 10) 1 part acrylic acid amide, 0,11 part acrylic acid and 0,48 part acrylonitrile, (9) 1 part acrylic acid amide, 0,43 part acrylonitrile and 0,075 part acrylic acid, while in certain other examples polymerization was conducted in the presence of ammonium persulphate, and (11) iron and chromium sulphates, (12) ammonium vanadate (13) manganese carbonate, (14) ferrous sulphate and ammonium vanadate and (15) ferrous sulphate and titanyl sulphate.
GB17238/58A 1957-05-29 1958-05-29 Process for the manufacture of foamed materials of artificial plastics Expired GB890909A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW21251A DE1080773B (en) 1957-05-29 1957-05-29 Process for the production of foam-shaped plastics

Publications (1)

Publication Number Publication Date
GB890909A true GB890909A (en) 1962-03-07

Family

ID=7596963

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17238/58A Expired GB890909A (en) 1957-05-29 1958-05-29 Process for the manufacture of foamed materials of artificial plastics

Country Status (2)

Country Link
DE (1) DE1080773B (en)
GB (1) GB890909A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004024806A2 (en) * 2002-09-09 2004-03-25 Röhm GmbH & Co. KG Novel, flame-resistant polymethacrylimide foams and methods for the production thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB994725A (en) * 1962-07-18 1965-06-10 Seikisui Chemical Co Ltd Process for producing multicellular synthetic structures

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482701A (en) * 1936-10-07 1938-04-04 British Thomson Houston Co Ltd Improvements in and relating to methods of producing insulating materials
DE700010C (en) * 1936-10-08 1940-12-11 Aeg Process for the production of foam-shaped insulating bodies
US2684341A (en) * 1951-02-03 1954-07-20 Gen Aniline & Film Corp Alpha-chloroacrylic acid ester polymer foam

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004024806A2 (en) * 2002-09-09 2004-03-25 Röhm GmbH & Co. KG Novel, flame-resistant polymethacrylimide foams and methods for the production thereof
WO2004024806A3 (en) * 2002-09-09 2004-05-06 Roehm Gmbh Novel, flame-resistant polymethacrylimide foams and methods for the production thereof

Also Published As

Publication number Publication date
DE1080773B (en) 1960-04-28

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