Preparation method of sulphur microcapsule used as rubber vulcanizing agent
A technology of microcapsules and vulcanizing agents is applied in the field of preparation of single-shelled sulfur microcapsules, which can solve the problems of dangerous production operation, equipment corrosion, unfavorable wide application of rubber products, etc. Effects of vulcanization problems
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Embodiment 1
[0014] Prepare the quality of each component that can be used as the sulfur microcapsule of rubber vulcanizing agent as follows:
[0015] Sublimed sulfur 15.1g
[0016] Urea 10.2g
[0017] 37% formaldehyde solution 20.3g
[0018] OP-10 Surfactant 0.5g
[0019] Polyvinyl alcohol 1.0g
[0020] Water 43.5g
[0021] Triethanolamine 0.5g
[0022] Formic acid 0.75g
[0023] The preparation method of sulfur microcapsules that can be used as rubber vulcanizing agent is as follows:
[0024] (1) Add 10.2 g of urea and 20.3 g of 37% formaldehyde solution to a four-necked flask, dropwise add 0.5 g of triethanolamine, adjust the pH value to 8-9, and stir and react at 70° C. for 1 h to prepare a urea-formaldehyde resin prepolymer;
[0025] (2) Prepare an aqueous solution containing 1.5g polyvinyl alcohol, add 0.5g OP-10 surfactant, heat and stir to prepare an aqueous phase solution;
[0026] (3) Add sublimated sulfur into the aqueous phase solution, shear and disperse for 5 minutes ...
Embodiment 2
[0031] The quality of each component of the sulfur microcapsules that can be used as rubber vulcanizing agent is prepared as follows:
[0032] Sublimed sulfur 15.1g
[0033] Urea 7.5g
[0034] 37% formaldehyde solution 14.8g
[0035] Sodium dodecyl sulfonate 0.15g
[0036] Gelatin 1.5g
[0037] Water 43.6g
[0038] Triethanolamine 0.6g
[0039] Formic acid 0.74g
[0040] The preparation method of the sulfur microcapsules that can be used as rubber vulcanizing agent is as follows:
[0041] (1) Add 7.5g of urea and 14.8g of 37% formaldehyde solution to a four-neck flask, dropwise add triethanolamine, adjust the pH value to 8-9, and stir and react at 70°C for 1h to prepare a urea-formaldehyde resin prepolymer;
[0042] (2) Prepare an aqueous solution containing 1.5 g of gelatin, add 0.15 g of sodium dodecylsulfonate, heat and stir to prepare an aqueous phase solution;
[0043] (3) Add sublimated sulfur into the aqueous phase solution, shear and disperse with a shear emuls...
Embodiment 3
[0048] The quality of each component of the sulfur microcapsules that can be used as rubber vulcanizing agent is prepared as follows:
[0049] Sublimed sulfur 14.9g
[0050] Urea 12.5g
[0051] 37% formaldehyde solution 25.1g
[0052] Sodium dodecyl sulfonate 0.15g
[0053] Gum Arabic 1.5g
[0054] Water 43.6g
[0055] Triethanolamine 0.5g
[0056] Formic acid 0.71g
[0057] The preparation method of the sulfur microcapsules that can be used as rubber vulcanizing agent is as follows:
[0058] (1) Add 12.5 g of urea and 25.1 g of formaldehyde solution to a four-neck flask, drop triethanolamine, adjust the pH value to 8-9, and stir and react at 70° C. for 1 hour to prepare a urea-formaldehyde resin prepolymer;
[0059] (2) Prepare an aqueous solution containing 1.5g gum arabic, add 0.15g sodium dodecylsulfonate surfactant, heat and stir to prepare an aqueous phase solution;
[0060] (3) Add sublimated sulfur into the aqueous phase solution, shear and disperse for 5 minutes...
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