The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2020
Filed:
Apr. 21, 2016
Covestro Deutschland Ag, Leverkusen, DE;
Mathias Matner, Neuss, DE;
Dirk Achten, Leverkusen, DE;
Hans-Josef Laas, Odenthal, DE;
Heiko Hocke, Shanghai, CN;
Dieter Mager, Leverkusen, DE;
Covestro Deutschland AG, Leverkusen, DE;
Abstract
The invention relates to a process for producing solids made from polyisocyanurate plastics, comprising the following steps: (a) providing a polyisocyanate composition A) which contains oligomeric polyisocyanates and is low in monomeric polyisocyanates, where the isocyanurate structure content in the polyisocyanate composition A) is at least 50 mol %, based on the sum total of the oligomeric structures from the group consisting of uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and oxadiazinetrione structure that are present in the polyisocyanate composition A); (b) catalytically trimerizing the polyisocyanate composition A), where (i) the catalytic trimerization is conducted at ambient temperatures of at least 80° C.; (ii) the catalytic trimerization is conducted within less than 2 hours at least up to a conversion level at which only at most 20% of the isocyanate groups originally present in the polyisocyanate composition A) are present; (iii) the catalytic trimerization takes place under quasi-adiabatic conditions which are characterized in that the material temperature at least one juncture is at least 10° C. above ambient temperature. The invention further relates to solids made from polyisocyanurate plastic, obtainable by the process of the invention.