3.
    发明专利
    未知

    公开(公告)号:DE4028211A1

    公开(公告)日:1992-03-12

    申请号:DE4028211

    申请日:1990-09-06

    Applicant: BASF AG

    Abstract: The process involves reacting a) organic and/or modified organic polyisocyanates with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and optionally c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of d) blowing agents e) catalysts and optionally f) assistants and/or additives, where the blowing agents (d) used are at least one organic carboxylic acid, preferably an aliphatic monocarboxylic acid, optionally in combination with water and/or a physical blowing agent, and where the catalysts (e) used are polyisocyanurate catalysts, preferably alkali metal or ammonium salts of organic carboxylic acids or tris(dialkylaminoalkyl)-s-hexahydrotriazines.

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