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CN107043499B 可激光标记的树脂组成物 失效 - 权利终止

可激光标记的树脂组成物
摘要：
一种可激光标记的树脂组成物，含有树脂以及激光光吸收剂，其中树脂包括分别占树脂的重量百分比(wt％)介于40至83间的(甲基)丙烯酸酯系‑苯乙烯系共聚物(A)、介于0至45的(甲基)丙烯酸酯系聚合物(B)以及介于10至35的核壳型聚合物(C)。激光光吸收剂包括碳黑(D)，相对于100重量份的树脂(D)的含量范围为0.01至0.25重量份。其中(A)包括分别占(A)的重量百分比介于40至80的(甲基)丙烯酸酯系单体单元，及介于20至60的苯乙烯系单体单元；(B)包括分别占(B)的重量百分比介于92至99的甲基丙烯酸酯系单体单元、介于1至8的丙烯酸酯系单体单元，以及介于0至7的含乙烯基可共聚合单体单元，且(B)具有介于70,000至150,000的重量平均分子量。(C)具有核芯部和部分或全面覆盖核芯部的壳层。
摘要（英）：

A resin composition for laser marking includes a resin and laser absorbers. The resin includes 40%˜83% (methyl)acrylate-styrene based copolymers (A), greater than 0 to 45% (methyl)acrylate based copolymers (B) and 5˜35% core-shell copolymers (C) by weight. The laser absorbers include 0.01˜0.25 parts of carbon black (D) for each 100 parts by weight of the resin. The (methyl)acrylate-styrene based copolymer (A) includes 40˜80% (methyl)acrylate-containing monomer units, 20% to 60% styrene series monomer units and 0% to 30% other-polymerizable monomer units by weight. The (methyl)acrylate based copolymers (B) includes 92˜99% methacrylate-type monomer units, 1˜8% acrylate series monomer units and 0˜7% vinyl-group-containing polymerizable monomer units by weight and has a weight-average molecular weight ranging from 70,000 to 150,000. Each core-shell copolymers (C) has a core portion that includes butadiene monomer units and (methyl)acrylate-containing monomer units and a shell portion that comprises (methyl)acrylate-containing monomer units at least partially covering the core portion.

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