公开(公告)号：US3923743A

公开(公告)日：1975-12-02

申请号：US44685774

申请日：1974-02-28

Applicant: BAYER AG

Inventor： QUIRING BERND ,  WAGNER KUNO ,  MULLER RICHARD ,  MULLER PETER

IPC: C09D5/03 ,  C08G18/00 ,  C08G18/79 ,  C09D5/46 ,  C09D175/00 ,  C08G18/06 ,  B05B5/02

CPC classification number: C09D175/00 ,  C08G18/798 ,  C08G2150/20

Abstract: A pulverulent coating composition adapted to be applied to a substrate by spraying as a powder is prepared by a process which comprises reacting an organic polyisocyanate containing a uretdione group with an organic compound containing groups which contain reactive hydrogen atoms determinable by the Zerewitinoff method wherein the functionality of the reactants and the proportions thereof are chosen to provide an average functionality between about 2.05 and 10, the ratio of reactive hydrogen groups to -NCO groups is between about 1.07 to 1 and about 2.5 to 1 and the amount of polyisocyanate containing uretdione groups is sufficient to provide from about 0.6 percent to about 25 percent by weight uretdione groups.

Abstract translation: 通过包括使含有脲二酮基团的有机多异氰酸酯与含有可通过Zerewitinoff法测定的反应性氢原子的有机化合物反应的方法制备适于通过喷雾作为粉末施加到基材上的粉末涂料组合物，其中官能度 选择反应物及其比例以提供约2.05至10的平均官能度，反应性氢基团与-NCO基团的比例在约1.07至约2.5至1之间，并且含有脲二酮基团的多异氰酸酯的量为 足以提供约0.6重量％至约25重量％的脲二酮基团。