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Preparation of environment protection aqueous SBS binder

A binder and water-based technology, applied in the field of preparation of environmentally friendly water-based SBS binder, can solve the problems of environmental producers and users hazards

Inactive Publication Date: 2009-06-24
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many manufacturers are adjusting their product structure to replace chloroprene adhesives with SBS adhesives, but it is worth noting that some manufacturers use more toxic halogenated hydrocarbons as solvents when producing SBS adhesives (such as : 1,2-dichloroethane, dichloromethane, etc.), which will cause new hazards to the environment, producers and users

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 500 g of SBS emulsion without polar functional groups with a solid content of 75% in a four-port synthesis device with a mechanical stirrer and a temperature control system. After passing the nitrogen for half an hour, the reaction system is heated to 35 ° C and stirred. Next, add 200g deionized water, after stirring and diluting evenly, add dropwise the monomer mixed system of 30g methyl methacrylate (MMA) and 5g methacrylic acid (MAA) mixed in advance, and dropwise add 4.5g of K 2 S 2 o 8 , add NaHCO 3 Adjust the pH value so that the pH value of the reaction system is 7.5; after reacting for 3 hours, add the remaining 0.5g of K 2 S 2 o 8 , and then heated to 86 ° C, continue to react for 1 hour, stop heating, continue to stir, after cooling down to room temperature, add 40g of rosin emulsified tackifier, that is, the prepared environmentally friendly water-based SBS adhesive.

[0015] According to GB / T2791-1995, apply the above-mentioned synthesized adhesive ...

Embodiment 2

[0017] Add 500 g of SBS emulsion with a hydroxyl group with a solid content of 70% in a four-port synthesis device with a mechanical stirrer and a temperature control system. After passing through nitrogen and exhausting the air for half an hour, the reaction system is heated to 50 ° C and stirred. Add 200g of deionized water, stir and dilute evenly; and add dropwise the pre-mixed 45g of methyl acrylate (MA), 10g of butyl acrylate (BA), 15g of styrene (ST) and 5g of methacrylic acid (MAA) monomer mixing system, while adding dropwise 9g of (NH 4 ) 2 S 2 o 8 , add NaHCO 3 Adjust the pH value so that the pH value of the reaction system is 7.8; after reacting for 2 hours, add the remaining 1g (NH 4 ) 2 S 2 o 8 , and then heated to 80 ° C, continue to react for 2 hours, stop heating, continue to stir, after cooling down to room temperature, add 75g of terpene emulsified tackifier, that is, the prepared environmentally friendly water-based SBS adhesive.

[0018] According to...

Embodiment 3

[0020] Add 500 g of carboxyl-containing SBS emulsion with a solid content of 48% into a four-port synthesis device with a mechanical stirrer and a temperature control system. After passing through nitrogen and exhausting the air for half an hour, the reaction system is heated to 45° C. and stirred. Add 50g of deionized water, stir and dilute evenly; add dropwise the monomer mixed system of 25g of methyl methacrylate (MMA) and 5g of methacrylic acid (MAA) mixed in advance, and dropwise add 13.5g of Na 2 S 2 o 8 , add NaHCO 3 Adjust the pH value so that the pH value of the reaction system is 7.2; after 2.5 hours of reaction, add the remaining 1.5g of Na 2 S 2 o 8 , then raised the temperature to 80°C, continued to react for 1.5 hours, stopped heating, continued to stir, and after cooling down to room temperature, added 60g of rosin emulsified tackifier, namely the prepared environmentally friendly water-based SBS adhesive.

[0021] According to GB / T2791-1995, apply the abov...

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Abstract

The invention relates to a method for preparing an environment-friendly waterborne SBS bonding agent. The formulation employed by the invention comprises: 100 parts of SBS emulsion, 5-50 parts of methyl methacrylate or methyl acrylate, 0-40 parts of phenethylene, 1-30 parts of methacrylic acid or acrylic acid, 0-40 parts of butyl methacrylate or butyl acrylate, 1-15 parts of radical initiators, 5-20 parts of emulsification tackifiers, 0.1-2 parts of NaHCO3 and 0-90 parts of deionized water. During preparation, the SBS emulsion and the deionzied water are added and nitrogen is fed into a synthesis device; the reaction system is preheated and is dripped with a premixed monomer mixing system and 90% initiator of the total desired amount, the NaHCO3 is added to regulate the pH value; after 2-3-hourreaction, the rest 10% of the initiator is supplemented and temperature rises to 80-90 DEG C and is then dropped to the room temperature after 1-2 hours, the emulsification tackifier is added. The invention has the advantages of having the operating temperature in a range from 120-180 DEG C, of being free from organic solvents, toxicity and combustion, and of spreading area, low cost, good water resistance, strong adhesion and high adhesion strength.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly water-based SBS binder. technical background [0002] Styrene-butadiene-styrene inlay copolymer (SBS) solvent-based adhesive is light and transparent in color, has good frost resistance and stamping resistance, and simple process. It is currently the most widely used glue in adhesives. However, the SBS adhesive has low adhesion to polar substrates and poor aging resistance. Use free radicals to open the unsaturated double bonds in the butadiene segment of the SBS molecule, and then graft polar monomers such as acrylates, so that the SBS molecule becomes a comb-like molecule with a polar side chain, and has a slight cross-linking effect. Linked to improve the cohesion of the binder and the adhesion to polar materials. Most of the current research focuses on SBS solvent-based adhesives, which have considerable toxicity and pollution during production and use, high cost, and the po...

Claims

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Application Information

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IPC IPC(8): C09J151/00
Inventor 丁富传陈清松张丽敏黄雪红赖寿莲李晓燕
Owner FUJIAN NORMAL UNIV
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