Preparation method of modified polysulfide sealant
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A polysulfide sealant, modified technology, applied in the field of sealants, can solve the problems of poor bonding performance and elongation at break of polysulfide sealant, achieve good bonding strength and elongation at break, and increase application performance effect
Inactive Publication Date: 2018-11-23
芜湖青悠静谧环保科技有限公司
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[0003] The object of the present invention is to provide a kind of preparation method of modified polysulfide sealant, obtain dispersion liquid by adding the modified graphene oxide in the butyl benzyl phthalate solution, then further use the dispersion liquid for the main agent In the synthesis ratio, the modified graphene oxide can be better dispersed into the liquid polysulfide sealant, and the graphene oxide is modified by using a silane coupling agent, and then the modified graphene oxide is used to modify the polysulfide sealant. Modified to solve the problem of poor bonding performance and elongation at break of the existing polysulfide sealant
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Embodiment 1
[0021] (1) Preparation of modified graphene oxide; preparation of modified graphene oxide using silane coupling agent γ-aminopropyltriethoxysilane and graphene oxide;
[0022] (2) preparing a dispersion liquid; adding 0.3 g of modified graphene oxide prepared in step (1) to 20 g of butyl benzyl phthalate solution and then performing ultrasonic dispersion treatment;
[0023] (3) Prepare the main agent; add 100g of nano calcium carbonate, 6g of carbon black, 10g of phenolic resin, 1g of coupling agent and the solution containing 20g of butyl benzyl phthalate prepared in step (2) into 200g of liquid polysulfide rubber After mixing the dispersion liquid, obtain a paste, and then repeatedly grind it with a three-roll mill until the color of the paste is uniform and bright;
[0024] (4) Preparation of hardener; 20g active manganese dioxide powder, 15g butyl benzyl phthalate and 2g diphenylguanidine are mixed uniformly and then ground using a three-roll mill;
[0025] (5) After mixing the ma...
Embodiment 2
[0027] (1) Same as step (1) in Example 1;
[0028] (2) preparing a dispersion liquid; adding 0.4 g of the modified graphene oxide prepared in step (1) to 20 g of butyl benzyl phthalate solution and then performing ultrasonic dispersion treatment;
[0029] (3) Same as step (3) in Example 1;
[0030] (4) Same as step (4) in Example 1;
[0031] (5) Same as step (5) in Example 1.
Embodiment 3
[0033] (1) Same as step (1) in Example 1;
[0034] (2) preparing a dispersion liquid; adding 0.5 g of modified graphene oxide prepared in step (1) to 20 g of butyl benzyl phthalate solution and then performing ultrasonic dispersion treatment;
[0035] (3) Same as step (3) in Example 1;
[0036] (4) Same as step (4) in Example 1;
[0037] (5) Same as step (5) in Example 1.
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Abstract
The invention discloses a preparation method of modified polysulfide sealant, and relates to the technical field of sealant. The preparation method comprises the following steps: (1) preparing modified graphene oxide; (2) preparing a dispersion; (3) preparing a host agent; (4) preparing a hardening agent; (5) mixing the host agent and the hardening agent and stirring. According to the preparationmethod disclosed by the invention, the modified graphene oxide is added into a benzyl butyl phthalate solution to obtain a dispersion, and the dispersion is further applied to the synthesis and proportioning of the host agent, thus the modified graphene oxide can be better dispersed in the liquid-state polysulfide sealant; by modifying the graphene oxide with a silane coupling agent and then modifying the polysulfide sealant with the modified graphene oxide, the problems of poor adhesive property and low elongation at break of existing polysulfide sealant are solved.
Description
Technical field [0001] The invention belongs to the technical field of sealants, and particularly relates to a method for preparing modified polysulfide sealants. Background technique [0002] Polysulfide sealant is a sealant made of liquid polysulfide rubber as the main material, combined with tackifying resin, vulcanizing agent, accelerator, reinforcing agent, etc.; polysulfide sealant has good curing properties and excellent corrosion resistance. It is widely used in construction, highway and automobile manufacturing industries. With the development of science and technology and the improvement of application performance, people began to modify polysulfide sealants to obtain better bonding strength and elongation at break. The currently widely used liquid polysulfide glue is dichloroethyl Formal and sodium polysulfide are the basic raw materials, and the prepolymer with trichloropropane as the cross-linking agent. The product performance is controlled by controlling the molec...
Claims
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