Flexible packaging composite adhesive and preparation method thereof

Patent Name Flexible Packaging Composite Adhesive and Its Preparation Patent Applicant Beijing Gaomeng Chemical Co., Ltd. Principal Applicant Address 102502 Yanshan Industrial Zone, Fangshan District, Beijing Inventor Hu Yanjiao; Li Yanke; Deng Yudong Application (Patent) No. 200510102932.8 Date of Application 2005.09 .14 ​​Approval Date Approval Notice No. 1730592 Audit Notice Date 2006.02.08 Manual CD-ROM D0606-1 Main Classification Code C09J133/08 (2006.01) I Classification Number C09J133/08 (2006.01) I Division Original Application No. 1 The kind of flexible packaging composite adhesive belongs to the technical field of emulsion adhesives used for the compounding of soft packaging bags and having a polymer copolymer as a component. The emulsion polymerization type water-based acrylic copolymer emulsion adhesive is characterized in that the latex particles in the acrylic copolymer emulsion have a core-shell three-layer microphase structure, and the waterborne acrylic copolymer emulsion has the following weight percentage composition: The ester copolymer is 38 to 48%, the emulsifier is 0.5 to 3%, and the remaining amount of water. The present invention also provides a preparation method of the flexible packaging composite adhesive, compared with random copolymer or simple blend of polymers. The three-layer core-shell emulsion has unique properties. It has a "hard core" and "soft shell" structure microphase composite polymer emulsion. The adhesive film obtained by using this adhesive has high peel strength and initial tack. For composite PET, PE, aluminum plated CPP, BOPP, have sufficient composite strength, and can withstand 130 °C high temperature. It can replace solvent-based polyurethane adhesives, and has the advantages of low organic residue, low cost, and no need for ripening. Sovereignty Item 1. A flexible packaging composite adhesive, which is an emulsion polymerization water-based acrylic copolymer emulsion adhesive characterized in that the latex particles in the acrylic copolymer emulsion have a core-shell three-layer microphase structure. The weight percent composition of the acrylic copolymer emulsion is: Acrylic copolymer 38-48% Emulsifier 0.5-3% The balance of the water The emulsifier is a composite emulsifier of an ionic emulsifier and a nonionic emulsifier, including Sodium dodecyl benzene sulphonate, sodium lauryl sulphate, sodium dodecyl sulphate, ammonium lauryl acetate or/and OP-10.