Nonaqueous paints

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C - Chemistry, Metallurgy

09

D

C09D 175/04 (2006.01) C08G 18/42 (2006.01) C08G 18/62 (2006.01) C08G 18/80 (2006.01) C09D 133/06 (2006.01) C09D 167/00 (2006.01) C09D 167/08 (2006.01) C09D 201/06 (2006.01) C08L 61/20 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2167403

The invention relates to nonaqueous paints which comprise (A) a hydroxyl group-containing synthetic resin or a lixture of hydroxyl group-containing synthetic resins (B) an amino resin or a mixture of amino resins (C) a blocked polyisocyanate or a mixture of blocked polyisocyanates, and (D) a pigment or a mixture of pigments, and are characterized in that component (C) contains both isocyanate groups blocked with a blocking agent (I) and isocyanate groups blocked with a blocking agent (II), in which context - the blocking agent (I) is a dialkyl malonate or a mixture of dialkyl malonates, - the blocking agent (II) is a blocking agent which is different from (I) and contains active methy- lene groups, or is an oxime, or is a mixture of these blocking agents, and - 28 - the ratio of equivalents between the isocyanate groups blocked with (I) and the isocyanate groups blocked with (II) is between 1.0:1.0 and 9.0:1Ø

L'invention concerne des peintures non aqueuses qui contiennent: (A) une résine synthétique contenant des groupes hydroxyle ou un mélange de résines synthétiques contenant des groupes hydroxyle; (B) une résine amino ou un mélange de résines amino et (C) un polyisocyanate bloqué ou un mélange de polyisocyanates bloqués et (D) un pigment ou un mélange de pigments. Ces peintures non aqueuses se caractérisent en ce que le constituant (C) contient des groupes isocyanate bloqués aussi bien avec un agent de blocage (I) qu'avec un agent de blocage (II). L'agent de blocage (I) est un dialcoylmalonate ou un mélange de dialcoylmalonates, l'agent de blocage (II) est différent de l'agent de blocage (I) et contient des groupes méthylène actifs ou bien est une oxime ou un mélange de ces agents de blocage et le rapport équivalent entre les groupes isocyanate bloqués par (I) et les groupes isocyanate bloqués par (II) se situe entre 1,0: 1,0 et 9,0: 1,0.

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