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
GB1833/57A
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.)
Mo och Domsjo AB
Original Assignee
Mo och Domsjo AB
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 Mo och Domsjo ABfiledCriticalMo och Domsjo AB
Publication of GB791316ApublicationCriticalpatent/GB791316A/en
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
C08F8/00—Chemical modification by after-treatment
C08F8/28—Condensation with aldehydes or ketones
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
C08F2810/00—Chemical modification of a polymer
C08F2810/20—Chemical modification of a polymer leading to a crosslinking, either explicitly or inherently
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Chemical & Material Sciences
(AREA)
General Chemical & Material Sciences
(AREA)
Health & Medical Sciences
(AREA)
Chemical Kinetics & Catalysis
(AREA)
Medicinal Chemistry
(AREA)
Polymers & Plastics
(AREA)
Organic Chemistry
(AREA)
Processes Of Treating Macromolecular Substances
(AREA)
Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications
(AREA)
Abstract
Polyvinyl alcohol in solid particulate form is treated with formaldehyde or a dialdehyde in an amount insufficient to impair the solubility in aqueous solvents but sufficient to reduce agglomeration of the polyvinyl alcohol when added to water. Specified dialdehydes are glyoxal, malon-, succin-, glutar-, adip-, aldehydes, heptanedial and octanedial. The aldehyde may be used in solution in a liquid in which the polyvinyl alcohol is insuluble, or in vapour form or in the form of an aerosol.
GB1833/57A1954-02-121955-02-11A method of improving the dissolution of high-molecular substances
ExpiredGB791316A
(en)
Process for the manufacture of openpore polyvinyl chloride foams having hydrophilic qualities which are capable of a reversible absorption and yielding of moisture
Improvements in the obtaining of inhibitor products of corrosión of subsequent anti-inflammatory and antifreeze action for aqueous liquids in contact with metallic pieces (Machine-translation by Google Translate, not legally binding)
Procedure for the preparation of stable aqueous solutions of cardenolides sensitive to oxidation. (Machine-translation by Google Translate, not legally binding)
Perfected procedure of isolation of the giberelic acid of an aqueous medium of fermentation of the same (Machine-translation by Google Translate, not legally binding)