GB808964A - Improvements in the production of articles of expanded rubber - Google Patents

Improvements in the production of articles of expanded rubber

Info

Publication number
GB808964A
GB808964A GB1167757A GB1167757A GB808964A GB 808964 A GB808964 A GB 808964A GB 1167757 A GB1167757 A GB 1167757A GB 1167757 A GB1167757 A GB 1167757A GB 808964 A GB808964 A GB 808964A
Authority
GB
United Kingdom
Prior art keywords
latex
per cent
weight
butadiene
conversion
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
GB1167757A
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
Application filed by Chemische Werke Huels AG filed Critical Chemische Werke Huels AG
Publication of GB808964A publication Critical patent/GB808964A/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
    • C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
    • C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
    • C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L21/00—Compositions of unspecified rubbers
    • 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
    • C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08J2309/06—Copolymers with styrene
    • C08J2309/08—Latex

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

A process for the production of expanded rubber articles by foaming up a rubber latex by stirring air or other gases into the latex, filling the resultant foam into a mould and then coagulating and vulcanizing, comprises using a latex which has been obtained by graft polymerization in aqueous emulsion by first polymerizing to a conversion of 5 to 20 per cent by weight a monomer mixture of 75 to 100 per cent by weight of styrene and 25 to 0 per cent by weight of butadiene in aqueous emulsion and then further polymerizing to a conversion of 60 to 85 per cent by weight after the addition of such an amount of monomeric butadiene that the weight ratio of the total amount of butadiene present to styrene amounts to 50:50 to 70:30. The latex may be used in admixture with natural rubber latex. In the polymerization, emulsifying agents which are preferably employed are salts of carboxylic acids (especially resin acids such as dehydroabietic acid) and of sulphonic acids, and alkyl sulphuric acid esters. Suitable polymerization catalysts are watersoluble inorganic per-salts, e.g. potassium persulphate, which can be used in conjunction with reducing agents such as sodium bisulphite. The latices obtained can be concentrated by creaming with alginate or polyacrylic acid salts or by evaporation. Before or during foaming there are added coagulants, such as fluosilicci acid salts and vulcanizing agents such as sulphur, zinc oxide and ultra accelerator. Colour pigments, fillers and stabilizers can also be added. In examples: (1) a mixture of 5 kg. styrene and 550 g. butadiene, emulsified in an aqueous solution of sodium dehydroabietate, caustic soda, sodium sulphate and potassium persulphate is polymerized at 45 DEG to 15 per cent conversion, 4.45 kg. butadiene is added and the polymerization continued to 70 per cent conversion. The latex obtained (which may be stabilized with distyryldiphenylamine, phenyl b -naphthylamine or 2,21-methylene-bis-(4-methyl-6-tertiary butyl phenol)) is mixed with natural rubber latex and sodium silicofluoride, sulphur, zinc oxide and tetramethylthiuram disulphide. The mixture is foamed by stirring in air, the foam is put into a mould and after coagulation is vulcanized by heating. (2) Different proportions of reactants are employed in a process similar to (1), the vulcanizing agents being employed as a paste with polyvinyl alcohol.ALSO:A process for the production of expanded rubber articles by foaming up a rubber latex by stirring air or other gases into the latex, filling the resultant foam into a mould and then coagulating and vulcanizing, comprises using a latex which has been obtained by graft polymerization in aqueous emulsion by first polymerizing to a conversion of 5 to 20 per cent. by weight a monomer mixture of 75 to 100 per cent. by weight of styrene and 25 to 0 per cent. by weight of butadiene in aqueous, emulsion and then further polymerizing to a conversion of 60 to 85 per cent. by weight after the addition of such an amount of monomeric butadiene that the weight ratios of the total amount of butadiene present to styrene amounts to 50 : 50 to 70 : 30. The latex is preferably used in admixture with natural rubber latex. Before or during foaming there are added coagulants such as fluosilicic acid salts and vulcanizing agents such as sulphur, zinc oxide and ultra accelerator (e.g. tetsamethyl thiuram disulphide) which may be added as a paste with polyvinyl alcohol.
GB1167757A 1956-06-09 1957-04-10 Improvements in the production of articles of expanded rubber Expired GB808964A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC13176A DE1056364B (en) 1956-06-09 1956-06-09 Process for the production of articles from foam rubber

Publications (1)

Publication Number Publication Date
GB808964A true GB808964A (en) 1959-02-11

Family

ID=7015379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1167757A Expired GB808964A (en) 1956-06-09 1957-04-10 Improvements in the production of articles of expanded rubber

Country Status (3)

Country Link
DE (1) DE1056364B (en)
FR (1) FR1174924A (en)
GB (1) GB808964A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6458491B1 (en) 2000-09-15 2002-10-01 Microporous Products, Lp Separator for energy storage cells
US6624207B2 (en) 2000-12-18 2003-09-23 Basf Aktiengesellschaft Aqueous polymer dispersion comprising rubber particles and polymer particles having a reinforcing action

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3447585A1 (en) * 1984-12-28 1986-07-10 Hüls AG, 4370 Marl STYROL / BUTADIENE-GROPFCOPOLYMERISATE LATEX AND THIS CONTAINING AS A REINFORCING LATEX, WHICH CAN BE VULCANIZED IN THE HEAT FOR THE PRODUCTION OF LATEX FOAM
US20060052513A1 (en) 2004-09-09 2006-03-09 Soren Butz Polymer latex suitable for the preparation of dip-molded articles
US8158691B2 (en) 2005-04-04 2012-04-17 Polymer Latex Gmbh & Co. Kg Aqueous reinforced rubber dispersions and their use for making latex foams
US8222362B2 (en) 2006-08-10 2012-07-17 Polymerlatex Gmbh Latex with reduced odor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6458491B1 (en) 2000-09-15 2002-10-01 Microporous Products, Lp Separator for energy storage cells
US6624207B2 (en) 2000-12-18 2003-09-23 Basf Aktiengesellschaft Aqueous polymer dispersion comprising rubber particles and polymer particles having a reinforcing action

Also Published As

Publication number Publication date
DE1056364B (en) 1959-04-30
FR1174924A (en) 1959-03-18

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