摘要： 以 4，4’-二环己基甲烷二异氰酸酯(HMDI)为异氰酸酯硬段、聚醚二元醇(DL-2000)为软段、三羟甲基丙烷(TMP)为扩链剂，通过溶液聚合法制备溶剂型聚氨酯压敏胶 A 组分。 以氨基树脂为交联剂、强酸为催化剂，在 120 °C 条件下烘烤 1 min 进行交联固化，得到聚乙烯( PE) 保护膜。 研究表明:当交联剂用量为 A 组分用量的 12% ~ 20%时，制备的 PE 保护膜性能良好，保护膜与基材之间反复粘结剥离无残胶。

关键词: 聚氨酯压敏胶, 氨基树脂, PE 保护膜

Abstract:

In this paper, polyurethane pressure-sensitive adhesive with different isocyanate hard segments, polyether soft segments, and a functional chain extender, was synthesized by solution polymerization process. then at 120 ℃, the roll coating process completed for adhesive cross-linking for 1 min to obtain a polyethylene PE) protective film. The result showed that HMDI, TMP, DL-2000 is the best raw materials for preparation of this pressuresensitive adhesive. when the 30% inhibitor was added into glue mixed system of amino resin cross-linking agents, strong acids and glue solution that it extended the gel at room temperature longer than 10 h. The protective film has a good wettability, and low peel strength 3 g/25 mm~40 g/25 mm, there is no adhesive residue on the protected substrate surface with repeated adhesion and peeling.

Key words: polyurethane pressure-sensitive adhesive, amino resin, polyethylene protective film