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Special rubber-type spot welding sealant for white automobile bodies and preparation method of sealant
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A technology of rubber type and sealant, which is applied in the direction of chemical instruments and methods, adhesives, adhesive types, etc., can solve problems such as poor performance, and achieve the effects of long service life, excellent overall performance, and excellent aging resistance
Active Publication Date: 2020-01-03
JINAN HANSIMAN TIMES TECH
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[0005] Aiming at the present situation that the spot welding glue for automobiles in the existing market emits hydrogen chloride gas and has poor performances when it is baked at high temperature, it provides a special rubber spot welding sealant for body-in-white and its preparation method
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Embodiment 1
[0033] A special rubber-type spot-welding sealant for body-in-white, in terms of weight fraction, comprises the following components: 50% of kneaded rubber, 5.0% of titanium dioxide, 19.4% of heavy calcium carbonate, 10% of nano-calcium carbonate, and a rubber vulcanizing agent DCP 0.3%, thinner 90# solvent oil 3%, vulcanization accelerator TMTD 0.2%, vulcanization accelerator MBT 0.1%, tackifier 3.0%, flame retardant Doher-6054% produced by Doer Chemical, acetylene carbon black 5% , the tackifier is a mixture of bisphenol A epoxy resin and adipic acid dihydrazide latent curing agent in a mass ratio of 1:1;
[0034] The mixed rubber, in terms of weight fraction, includes the following components: 14% cis-butadiene rubber, 14% nitrile rubber, 28% styrene-butadiene rubber, 30% liquid polybutadiene, 5.0% heavy calcium carbonate, ordinary light Calcium carbonate 5.0%, antioxidant N,N'-xylyl-p-phenylenediamine 4.0%.
Embodiment 2
[0036] A special rubber-type spot welding sealant for body-in-white, in terms of weight fraction, comprises the following components: 45% of kneaded rubber, 5.5% of titanium dioxide, 22% of heavy calcium carbonate, 11% of nano-calcium carbonate, and a rubber vulcanizing agent DCP 0.33%, diluent 70# solvent oil 3.3%, vulcanization accelerator TMTD 0.2%, vulcanization accelerator MBT 0.13%, tackifier 3.3%, flame retardant Doher-6014.4% produced by Doer Chemical, acetylene carbon black 4.84% , the tackifier is a mixture of bisphenol F epoxy resin and boron trifluoride monoethylamine complex latent curing agent in a mass ratio of 1:1;
[0037] The mixed rubber includes the following components in terms of weight fraction: 15.4% of butadiene rubber, 12.6% of nitrile butadiene rubber, 25.2% of styrene-butadiene rubber, 33% of liquid polybutadiene, 4.5% of heavy calcium carbonate, ordinary light Calcium carbonate 5.5%, antioxidant N,N'-xylyl-p-phenylenediamine 3.8%.
Embodiment 3
[0039] A special rubber-type spot-welding sealant for a body-in-white, in terms of weight fraction, comprises the following components: 55% of kneaded rubber, 4.5% of titanium dioxide, 18% of heavy calcium carbonate, 9% of nano-calcium carbonate, and a rubber vulcanizing agent DCP 0.27%, thinner 70# solvent oil 2.7%, vulcanization accelerator TMTD 0.2%, vulcanization accelerator MBT 0.07%, tackifier 2.7%, Doher-6013.6% flame retardant, acetylene carbon black 4.0% , the tackifier is a mixture of bisphenol S-type epoxy resin and 2-methylimidazole latent curing agent in a mass ratio of 1:1;
[0040] The mixed rubber, in terms of weight fraction, includes the following components: 12.6% of butadiene rubber, 15.4% of nitrile butadiene rubber, 30.8% of styrene-butadiene rubber, 27% of liquid polybutadiene, 5.5% of heavy calcium carbonate, ordinary light Calcium carbonate 4.5%, antioxidant N,N'-xylyl-p-phenylenediamine 4.2%.
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Abstract
The invention relates to a special rubber-type spot welding sealant for white automobile bodies. The sealant includes the following components in percentages by weight: 45-55% of mixed rubber, 4.5-5.5% of titanium dioxide, 18-22% of heavy calcium carbonate, 9-11% of nano calcium carbonate, 0.27-0.33% of a rubber vulcanizing agent, 2.7-3.3% of a thinner, 0.27-0.33% of a vulcanization accelerator, 2.7-3.3% of a tackifier, 3.6-4.4% of a liquid flame retardant, and 4.0-5.5% of electroconductive carbon black, wherein the mixed rubber includes the following components in percentages by weight: 12.6-15.4% of cis-polybutadiene, 12.6-15.4% of acrylonitrile-butadiene rubber, 25.2-30.8% of styrene-butadiene rubber, 27-33% of liquid polybutadiene, 4.5-5.5% of heavy calcium carbonate, 4.5-5.5% of ordinary light calcium carbonate, and 3.8-4.4% of an anti-aging agent. The rubber-type spot welding sealant provided by the invention uses the mixed rubber as master batch, does not use a component containing PVC, ensures that no corrosive components are volatilized in the spot welding process, uses the halogen-free liquid flame retardant and the acetylene electroconductive carbon black, achieves the purpose of flame retardance and electrical conductivity without increasing the viscosity and introducing other electroconductive substances, does not contain organic solvents in the formula, and is green and environmentally friendly.
Description
technical field [0001] The invention relates to a spot welding sealant and a preparation method thereof, in particular to a special rubber-type spot welding sealant for body-in-white and a preparation method thereof, and belongs to the technical field of sealant formulation and preparation method. Background technique [0002] The main function of spot welding glue for automobiles is to seal, dampen and disperse the stress around the solder joints, so as to achieve the functions of dustproof, waterproof, anticorrosion and shock absorption, thereby prolonging the service life of automobiles. It is mainly used in automobile welding production lines. , Before the coating process of the automobile body, the joints of the parts composed of steel plates are pre-coated with anti-rust spot welding sealant, and then spot welding is carried out after superimposing, and then degreasing, washing, phosphating, electrophoresis and other treatments are carried out together with the body. A...
Claims
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Application Information
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