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Special structural sealant for sealing packaging bags and preparation method thereof
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A sealant and packaging bag technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve problems such as inability to withstand high temperatures above 60 degrees, limited strength of neoprene, and inapplicability of flexible materials. Low, improved sealing performance, and wide application range
Active Publication Date: 2019-12-13
武汉国利精细科技有限公司
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Problems solved by technology
Existing structural sealants are silicone glue, epoxy glue, and neoprene; silicone glue has low strength and cannot be used under high-strength requirements; epoxy glue can only be used for rigid materials and is not suitable for flexible materials. Applicable and brittle in an environment below -30°C; neoprene has limited strength and cannot withstand high temperatures above 60°C
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Embodiment 1
[0051] A special structural sealant for airtight packaging bags, the ABS resin is 20 parts by weight, the copolymer of chloroprene and methacrylic acid is 60 parts by weight, and the MDI is 8 parts by weight , 8 parts by weight of chloroform, and 4 parts by weight of KH550.
[0052] A method for preparing the special structural sealant for sealing packaging bags, comprising the steps of:
[0053] Step 1: In a vacuum reaction device, heat the ABS resin to 60°C under normal pressure;
[0054] Step 2: Add chloroprene resin into the reaction device, and continue to keep warm at 60°C for 30min under normal pressure;
[0055] Step 3: Start the stirring device, stir for 15 minutes, and mix the ABS resin and neoprene resin;
[0056] Step 4: Add the solvent, stir evenly, and adjust the viscosity to 1000-2000Pa.s;
[0057]Step 5: Add modifier and cross-linking agent, airtightly evacuate to below 10Kpa, mix and stir for 30 minutes, stop stirring, and cool to obtain the finished produc...
Embodiment 2
[0059] A special structural sealant for sealing packaging bags, ABS resin is 25 parts by weight, the copolymer of chloroprene and methacrylic acid is 55 parts by weight, and TDI is 8 parts by weight , No. 120 solvent oil is 4 parts by weight, aviationkerosene is 4 parts by weight, and KH550 is 4 parts by weight.
[0060] Its preparation method is identical with embodiment 1.
Embodiment 3
[0062] A special structural sealant for airtight packaging bags, the ABS resin is 30 parts by weight, the copolymer of chloroprene and methacrylic acid is 50 parts by weight, and the TDI is 8 parts by weight , 8 parts by weight of chloroform, and 4 parts by weight of KH550.
[0063] Its preparation method is identical with embodiment 1.
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Abstract
The invention discloses a special structural sealant for seal packaging bags and a preparation method of the special structural sealant for the seal packaging bags. The special structural sealant is prepared from, by weight, 20-45 parts of ABS resin, 35-60 parts of chloroprene resin, 7-10 parts of a modifying agent, 8 parts of a solvent and 2-5 parts of a cross-linking agent. The special structural sealant has advantages of high adhesion strength, high toughness, high and low temperature resistance, reliability in sealing performance and capability of meeting utilization environment requirements of the seal packaging bags.
Description
technical field [0001] The invention relates to the field of polymer sealing materials, more specifically it is a special structural sealant for sealing packaging bags. The invention also relates to a method for preparing the special structural sealant for sealing packaging bags. Background technique [0002] The development of science and technology in modern society is inseparable from various electronic devices. These devices need to be packed with cushioning, shockproof, sunscreen and moisture-proof, and even airtight and waterproof functions in transportation, storage and working environments; In the process of designing sealed packaging products, the problem of structural sealing is involved, that is, the materials can be bonded together, the strength can meet the requirements, and the sealing can be achieved. effect. Existing structural sealants are silicone glue, epoxy glue, and neoprene; silicone glue has low strength and cannot be used under high-strength require...
Claims
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Application Information
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