The invention concerns a novel catalyst for forming urethanes. Said catalyst is characterized by the general formula: MY
3−q
[Z]
q
, wherein: Z is the radical corresponding to the anion of a super acid whereof the Hamett constant is at least equal to 13 and advantageously more than 13, M representing a trivalent metal, preferably known for forming Lewis acids; Y is an anion or a monovalent anionic function; and q is an integer selected advantageously between 1 and 3, inclusively. The invention is applicable to paint.
该发明涉及一种用于形成
脲酯的新型催化剂。所述催化剂的特征是一般公式:MY3−q[Z]q,其中:Z是对应于超强酸的阴离子的基团,其Hamett常数至少等于13,且优选大于13;M代表三价
金属,最好是用于形成Lewis酸的
金属;Y是一个阴离子或一价阴离子功能;q是一个整数,优选选择在1到3之间,包括1和3。该发明适用于涂料。