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Preparation method of deoximation type one-component room-temperature sealant

A one-component, sealant technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve problems such as unreasonable formula matching, waste of time and cost, and low production efficiency

Inactive Publication Date: 2017-09-08
JIANGSU TIANCHEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] One-component room temperature vulcanized silicone rubber can be used for a long time in an ultra-wide temperature range (-60~200°C), has excellent electrical insulation performance and chemical stability, weather aging resistance, and has good adhesion to various materials It is widely used in all walks of life; however, the existing one-component room temperature vulcanization silicone rubber has a low curing rate, low production efficiency, and waste due to its unreasonable formulation and unreasonable preparation methods. time cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] A preparation method of the above-mentioned deoxime type single-component room temperature sealant includes the following steps:

[0042] A. Put 25-60 parts of 107 glue, 3-15 parts of cross-linking agent, and 3-15 parts of auxiliary agent in a planetary mixer, and vacuum stirring for 10-40min to mix evenly;

[0043] B. Add 20 to 55 parts of filler into the planetary mixer in batches, and stir for 15 to 75 minutes under vacuum to mix evenly;

[0044] C. Add 1-10 parts of coupling agent and 0.01%-0.15% organotin catalyst into the planetary stirrer, and vacuum stirring for 10-40min to obtain the product.

[0045] The preparation method of the deoxime type single-component room temperature sealant of the present invention will be specifically described below through specific examples:

Embodiment 1

[0047] 450g of 107 glue with a viscosity of 50,000, 100g of additives (polyethylene glycol, molecular weight of 200 and 600 in mass ratio 1:1), 50g of cross-linking agent (methyl tributyl ketoxime silane, vinyl tributyl ketone) The mass ratio of oxime silane is 1:1) Put it in a planetary mixer and stir for 10 minutes under vacuum, then add 200g nano calcium carbonate, 50g sepiolite, 50g bentonite, 80g heavy calcium in 2 times, vacuum stirring for 60 minutes, and finally Add 20g of coupling agent (KH550) and 0.8g of organotin catalyst, stir under vacuum for 20 minutes, then the glue can be discharged. This rubber sheet has a strength of 2.62MPa, an elongation rate of 310%, a shear of 2.1MPa, and a 4h curing depth of 1.8mm.

Embodiment 2

[0049] Combine 400g of 107 glue with a viscosity of 80,000, 100g of additives (polyethylene glycol with a molecular weight of 400, polypropylene glycol with a molecular weight of 1:1 in mass ratio), and 50g of crosslinking agent (methyl tributyl ketoxime silane, vinyl The mass ratio of tributyl ketoxime silane is 5:3) Put it in a planetary mixer and stir for 20 minutes under vacuum, then add 240g nano-calcium carbonate, 30g sepiolite, 50g bentonite, 100g heavy calcium, and vacuum stirring 50 times. Minutes, finally add 30g coupling agent (KH560, KH602 mass ratio 1:1), 0.8g organotin catalyst, vacuum stirring for 25 minutes, the glue can be produced. This rubber sheet has a strength of 2.58MPa, an elongation rate of 360%, a shear of 2.2MPa, and a 4h curing depth of up to 1.9mm.

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Abstract

The invention discloses a sealant preparation technology, in particular a preparation method of a deoximation type one-component room-temperature sealant. The sealant contains the following components in parts or percentage by weight: 25-60 parts of 107 adhesive, 3-15 parts of a crosslinking agent, 20-55 parts of filler, 3-15 parts of auxiliaries, 1-10 parts of a coupling agent and 0.01-0.15% of an organic tin catalyst. By adopting the formula and the method, the sealant has stronger physical properties and also has rapid curing characteristic; meanwhile, a porous structure filler reasonable in formula and a hygroscopic polymer are added, and the filler of the porous structure and a hydrophilic polymer can absorb water vapor in the air in the sealant, so that the curing rate of the sealant is increased; and the obtained sealant has the strength higher than 2.5MPa, the stretching rate higher than 300% and the shear higher than 2.0MPa, and the highest curing depth after 4 hours can reach 1.9mm.

Description

Technical field [0001] The invention relates to a preparation technology of a sealant, in particular to a preparation method of a deoxime type single-component room temperature sealant. Background technique [0002] One-component room temperature vulcanized silicone rubber can be used for a long time in an ultra-wide temperature range (-60~200℃). It has excellent electrical insulation and chemical stability, weather resistance, and good adhesion to a variety of materials It is widely used in all walks of life; however, the existing one-component room temperature vulcanization silicone rubber is unreasonable due to its unreasonable formula and preparation method, which makes the curing rate of one-component room temperature vulcanization silicone rubber low, low production efficiency and waste The time cost of the enterprise. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing a deoxime type single-comp...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/04C09J11/06C09J11/08
CPCC09J183/06C08L2205/025C08L2205/03C09J11/04C09J11/06C09J11/08C08L71/02C08K13/06C08K9/04C08K3/346C08K3/26C08K3/34C08K5/5465C08K5/544C08L83/06
Inventor 徐文俊宋顺刚其他发明人请求不公开姓名
Owner JIANGSU TIANCHEN NEW MATERIALS
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