Radiation curable coating composition and process for coating a substrate therewith
申请人:GAF CORPORATION
公开号:EP0026339A1
公开(公告)日:1981-04-08
What is described herein is a radiation curable coating composition comprising:
A. An oligomer of Formula 1:
wherein:
R1 is hydrogen or methyl; and
Y is a divalent urethane residue; and
B. a copolymerizable ultra-violet light absorber which is a copolymerizable (2-cyano-3, 3-diphenylacryloxy) alkylene acrylic acid ester of Formula IV:
where (Ar)1 and (Ar)2 are aromatic carbocylic nuclei of the benzene and naphthalene series;
X is alkylene, C2-C17, unsubstituted or substituted;
and Y is a copolymerizable radical selected from acryloyl, alkylacryloyl, acryloxyalkyl, acryloxyhydroxyalkyl, or alkylacryloxyhydroxyalkyl, having from C3-C12 carbon atoms, or-RCR'=CHR, where
R is alkylene, C1-C10, oxyalkylene, C1-C10, alkyleneoxyalkylene, C1-C10 or phenylene, C1-C10, unsubstituted or substituted with hydroxy, and
R' and R" are independently hydrogen or alkyl, C1-C6.
Preferably the coating composition contains a vinyl monomer, such as N-vinyl-2-pyrrolidone or an acrylic acid ester, which is copolymerizable with the oligomer.
The process for curing the composition also is disclosed.
本文所述的辐射固化涂层组合物包括
A.式 1 的低聚物
其中
R1 是氢或甲基;以及
Y 是二价氨基甲酸乙酯残基;以及
B. 可共聚的紫外线吸收剂,它是式 IV 的可共聚(2-氰基-3, 3-二苯基丙烯酰氧基)亚烷基丙烯酸酯:
其中(Ar)1 和(Ar)2 是苯系列和萘系列的芳香碳核;
X 为未取代或取代的 C2-C17 亚烷基;
Y 是可共聚的基团,选自丙烯酰基、烷基丙烯酰基、丙烯酰氧基烷基、丙烯酰氧基羟基烷基或烷基丙烯酰氧基羟基烷基,具有 C3-C12 碳原子,或-RCR'=CHR,其中
R 是亚烷基、C1-C10、氧基亚烷基、C1-C10、亚烷氧基亚烷基、C1-C10 或未取代或被羟基取代的 C1-C10 亚苯基,以及
R' 和 R" 独立地为氢或 C1-C6 烷基。
涂层组合物最好含有乙烯基单体,如 N-乙烯基-2-吡咯烷酮或丙烯酸酯,可与低聚物共聚。
此外,还公开了固化组合物的工艺。