A resin composition for a coating for an optical fiber which comprises a radical polymerizable oligomer (A) and a radical polymerizable monomer (B), wherein (A) comprises a radical polymerizable oligomer (A1) with Mn of 600 to 1600 formed by reacting compounds (1) to (3) below: (1) an aliphatic polyol compound with Mn of 50 to 600, (2) a polyisocyanate compound with a ring structure, and (3) a compound with a hydroxyl group and a radical polymerizable unsaturated group; and a radical polymerizable oligomer (A2) formed by reacting compounds (4) to (6) below: (4) an aliphatic polyol compound with Mn of 800 to 10,000, (5) a polyisocyanate compound, and (6) a compound with a hydroxyl group and a radical polymerizable unsaturated group; a mass ratio (A1)/ (A2) is 20/80 to 80/20, and a concentration of urethane linkages within the resin composition is 1.85 to 3.00 mol/kg.
一种用于光纤涂层的
树脂组合物,包括一种自由基聚合的寡聚体(A)和一种自由基聚合的单体(B),其中(A)包括一种由下列化合物(1)至(3)反应形成的平均分子量为600至1600的自由基聚合寡聚体(A1):(1)平均分子量为50至600的脂肪族多元醇化合物,(2)具有环状结构的聚
异氰酸酯化合物,以及(3)具有羟基和自由基聚合不饱和基团的化合物;以及由下列化合物(4)至(6)反应形成的自由基聚合寡聚体(A2):(4)平均分子量为800至10,000的脂肪族多元醇化合物,(5)聚
异氰酸酯化合物,以及(6)具有羟基和自由基聚合不饱和基团的化合物;(A1)/(A2)的质量比为20/80至80/20,
树脂组合物中
脲键的浓度为1.85至3.00摩尔/千克。