• 专利标题:   Preparing aqueous polyurethane/polysiloxane pressure-sensitive adhesive for pressure-sensitive adhesive tape, by drying polyglycol adding catalyst, reacting, adding crosslinking agent, reacting, and dispersing dopamine-modified graphene.
  • 专利号:   CN112280520-A
  • 发明人:   ZHONG J, CHEN S, LIN Z, CHEN Y
  • 专利权人:   YONGYI ADHESIVE ZHONGSHAN CO LTD
  • 国际专利分类:   C08G018/12, C08G018/32, C08G018/34, C08G018/44, C08G018/48, C08G018/61, C08G018/66, C09J011/04, C09J175/04, C09J175/08, C09J007/38
  • 专利详细信息:   CN112280520-A 29 Jan 2021 C09J-175/08 202118 Pages: 8 Chinese
  • 申请详细信息:   CN112280520-A CN11081235 10 Oct 2020
  • 优先权号:   CN11081235

▎ 摘  要

NOVELTY - Method for preparing aqueous polyurethane/polysiloxane pressure-sensitive adhesive involves (i) drying polyglycol and carboxylic acid hydrophilic diol, adding diisocyanate, catalyst, and antioxidant to stir and reacting to generate first isocyanate-terminated prepolymer, (ii) adding bisamino-terminated polysiloxane and crosslinking agent to the above product, and reacting to obtain a second prepolymer, (iii) adding neutralizer to the above product to react to form a salt, adding water for dispersion and emulsification, and removing organic solvent to obtain aqueous polyurethane/polysiloxane pressure-sensitive adhesive emulsion, and (iv) adding dopamine-modified graphene to the adhesive emulsion, and uniformly dispersing to obtain the product. USE - The method is useful for preparing aqueous polyurethane/polysiloxane pressure-sensitive adhesive for pressure-sensitive adhesive tape (all claimed). ADVANTAGE - The adhesive has excellent comprehensive properties such as better mechanical properties, and thermal stability and thermal conductivity, and is simple to operate, easy to implement, and beneficial to expand the application field of the pressure-sensitive adhesive.