Disclosed is a flame-retardant liquid photosensitive resin composition consisting essentially of
(a) a (meth)acrylate obtained by the reaction of a compound having two or more epoxy groups in the molecule with (meth)acryalic acid and a dibasic acid or its anhydride, the (meth)acrylate having an average acid value of 4 to 150 and a number average molecular weight of 300 to 5,000;
(b) a monomer having at least one (meth)acryloyloxy group and containing not less than 20% by weight of bromine;
(c) a monomer having two or more (meth)acryloyloxy groups in the molecule;
(d) a monomer having one (meth)acryloyloxy group in the molecule;
(e) at least one inorganic filler; and
(f) at least one photopolymerization catalyst selected from the group consisting of photo-initiators and photosensitizers,
wherein the content of bromine in the total composition is in the range of 0.5 to 28% by weight.
This flame-retardant liquid photosensitive resin composition has excellent homogeneity and alkali developability, yields a cured coating film having good adhesion, solvent resistance, thermal resistance, electrical insulating properties and flame retardancy, and is suitable for use as a solder resist in the fabrication of printed circuit boards.
公开了一种阻燃液态感光
树脂组合物,其主要成分包括
(a) 一种(甲基)
丙烯酸酯,由分子中含有两个或两个以上环氧基团的化合物与(甲基)丙 烯酸和二元酸或其酸酐反应而得,该(甲基)
丙烯酸酯的平均酸值为 4 至 150,平均分子量为 300 至 5000;
(b) 具有至少一个(甲基)
丙烯酰氧基并含有不少于 20%(重量)
溴的单体;
(c) 分子中有两个或两个以上(甲基)
丙烯酰氧基的单体;
(d) 分子中含有一个(甲基)
丙烯酰氧基的单体;
(e) 至少一种无机填料;及
(f) 至少一种光聚合催化剂,选自由光
引发剂和光敏剂组成的组、
其中
溴在总成分中的含量范围为 0.5%至 28%(按重量计)。
这种阻燃液态光敏
树脂组合物具有极佳的均匀性和碱显影性,固化后的涂膜具有良好的附着力、耐溶剂性、耐热性、电绝缘性和阻燃性,适用于在印刷电路板制造中用作阻焊剂。