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.)
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.)
Perstorp AB
Original Assignee
Perstorp 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 Perstorp ABfiledCriticalPerstorp AB
Priority to ES341888ApriorityCriticalpatent/ES341888A3/en
Publication of ES341888A3publicationCriticalpatent/ES341888A3/en
A process for introducing a linear polymer of formaldehyde containing not more than 100 units of formaldehyde, by evaporating water from an aqueous formaldehyde solution comprising evaporating the water in a period of less than 15 minutes, at a pressure not exceeding 400 mm hg and at a temperature in the range of 40-80ºC in a thin film evaporator, continuously removing formaldehyde polymer from the evaporator within a period of 2 minutes from its formation, and cooling the polymer at a rate such that a polymer is obtained of the desired degree of polymerization and containing not more than 100 units of formaldehyde. (Machine-translation by Google Translate, not legally binding)
ES341888A1967-06-161967-06-16A procedure to produce a linear polymer of folmaldehyde. (Machine-translation by Google Translate, not legally binding)
ExpiredES341888A3
(en)
A procedure for the treatment of a mixture of symmetrical and asymmetric diclorotetrafluorethane. (Machine-translation by Google Translate, not legally binding)
A procedure for the manufacture of postpolicondensible polycaraurinlactamas by polymerization of laurinlactama. (Machine-translation by Google Translate, not legally binding)
A process in which at least a physical property of a body of a vitreo or vitrocrystal material is modified. (Machine-translation by Google Translate, not legally binding)