发明名称 |
Stabilized photosensitive screen printing dispersion composition with diazo condensate, polyvinyl alcohol, and copolymer of vinyl acetate and N-methyloc acrylamide |
摘要 |
This invention relates to a screen printing stencil composition which comprises (a) a stabilized aqueous dispersion of a water insoluble addition copolymer having units of formulas: A and B where A is preferably a polyvinyl acetate group and B is preferably a polyvinyl n-methylol acrylamide group and B comprises about 3% by weight of the copolymer; (b) a water soluble colloid; and (c) a photosensitizer: The composition is useful in the formation of a screen printing stencil, the composition having both a long stable profile and forming a durable stencil; the composition on exposure through a photographic positive can be developed with water and cross-linked with acid.
|
申请公布号 |
US4960671(A) |
申请公布日期 |
1990.10.02 |
申请号 |
US19890440311 |
申请日期 |
1989.11.22 |
申请人 |
DICKINSON, PETER |
发明人 |
DICKINSON, PETER |
分类号 |
G03F7/038;G03F7/004;G03F7/021;G03F7/12 |
主分类号 |
G03F7/038 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|