Title:
【発明の名称】成形品製造のための二段階法
Document Type and Number:
Japanese Patent JP2597121
Kind Code:
B2
Abstract:
Molded articles are produced in a two-stage process. In the first stage, an organic polyisocyanate is reacted with an organic compound containing at least two epoxide groups (NCO: epoxide equivalent ratio of 1.2:1 to 500:1) in the presence of a tertiary amine catalyst. This reaction is stopped when no more than 65% of the isocyanate groups have reacted by adding an alkylating sulfonic acid alkyl ester of methyl iodide and/or of dimethyl sulfate in an amount equivalent to the amount of tertiary amine catalyst present. A latent catalyst capable of being activated by heat is subsequently added to the intermediate product and the resultant mixture is heated in a mold to complete the crosslinking of the intermediate product and to form the molded article.
Inventors:
Hans Peter Miular
Walter Weldingen
Heinrich Heine
Walter Weldingen
Heinrich Heine
Application Number:
JP32424487A
Publication Date:
April 02, 1997
Filing Date:
December 23, 1987
Export Citation:
Assignee:
Bayer Actien Gezershyaft
International Classes:
C08G18/00; C08G18/04; C08G18/08; C08G18/10; B29C45/00; C08G18/16; C08G18/18; C08G18/30; C08G18/58; C08G18/63; (IPC1-7): C08G18/58; C08G18/10; C08G18/16
Attorney, Agent or Firm:
Kawahara Kazuho