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Preparation method of composite surface treatment agent and nano-calcium carbonate for high-strength and low-modulus silicone adhesive

A composite surface treatment and nano-calcium carbonate technology, which is applied in the treatment of dyed organic silicon compounds, dyed low-molecular organic compounds, and inorganic pigments, can solve the problems of general surface treatment effects, slow carbonization reaction, and insufficient contact. Achieve the effects of reducing particle agglomeration, good surface treatment performance, and reducing interaction

Active Publication Date: 2020-08-04
江西势通钙业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this patent, kiln gas is directly fed into the reaction kettle for carbonization reaction, and the volume content of carbon dioxide is 25-35%. The concentration of carbon dioxide is low, so the carbonization reaction is slow, the reaction is not complete, and the nucleation of nano-calcium carbonate is slow; in addition, the patent uses secondary surface treatment, which not only has a complicated process, but also has a general surface treatment effect, resulting in relatively poor dispersion of nano-calcium carbonate. Difference

Method used

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  • Preparation method of composite surface treatment agent and nano-calcium carbonate for high-strength and low-modulus silicone adhesive
  • Preparation method of composite surface treatment agent and nano-calcium carbonate for high-strength and low-modulus silicone adhesive
  • Preparation method of composite surface treatment agent and nano-calcium carbonate for high-strength and low-modulus silicone adhesive

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Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 The shown carbonization reactor of the present invention comprises a liquid film nucleator 1 and a crystal grower 2, the upper end of the liquid film nucleator 1 is provided with a slurry inlet-11 and a slurry outlet-14, and the lower end is provided with The gas inlet one 12, the slurry inlet one 11 and the slurry outlet one 14 are respectively located on both sides of the liquid film nucleator 1, and the liquid film nucleator 1 is also provided with a gas distributor 13; the crystal grower 2 The upper end is provided with a slurry inlet 2 21, the lower end is provided with a gas inlet 22 and a slurry outlet 2 23, the crystal grower 2 is also provided with a stirrer 24, and the crystal grower 2 is provided with a motor 25 connected with the stirrer 24 , the first slurry outlet 14 and the second slurry inlet 21 are communicated through the pump 3, and the first slurry inlet, the second slurry inlet, the first gas inlet and the second gas inlet are all e...

Embodiment 2

[0054] A preparation method of a composite surface treatment agent, comprising the following steps:

[0055] (1) Add RHJ-01 simethicone emulsifier into water and soak, stir and mix. The mass ratio of Triton X-100 to water is 1:15. After Triton X-100 is completely dissolved, slowly drop by drop Add simethicone oil, the amount of methicone oil is 2% of the total mass of surfactant and water to obtain a mixed solution, put the mixed solution into a high-speed dispersing emulsifier and rotate at a speed of 2000r / min to make simethicone Dispersed into the surfactant solution to form a homogeneous silicone oil emulsion;

[0056] (2) Stearic acid, sodium hydroxide, and tallow oil are mixed according to a mass ratio of 6:1:4, and a saponification reaction occurs at a reaction temperature of 70° C. to obtain a homogeneous saponified liquid;

[0057] (3) Mix the homogeneous silicone oil emulsion prepared in step (1), the homogeneous saponified liquid prepared in step (2) and KH-550, an...

Embodiment 3

[0060] A preparation method of a composite surface treatment agent, comprising the following steps:

[0061] (1) Soak Triton X-100 in water, stir and mix, the mass ratio of Triton X-100 to water is 1:20, after Triton X-100 is completely dissolved, slowly add dimethylformamide drop by drop Base silicone oil, the amount of methyl silicone oil is 4% of the total mass of surfactant and water to obtain a mixed solution, put the mixed solution in a high-speed dispersing emulsifier and rotate at a speed of 2500r / min to disperse the dimethyl silicone oil on the surface In the active agent solution, a homogeneous silicone oil emulsion is formed;

[0062] (2) Stearic acid, sodium hydroxide, and tallow oil are mixed according to a mass ratio of 6:1:4, and a saponification reaction occurs at a reaction temperature of 90° C. to obtain a homogeneous saponified liquid;

[0063] (3) Mix the homogeneous silicone oil emulsion prepared in step (1), the homogeneous saponified liquid prepared in ...

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Abstract

The invention discloses preparation methods of a composite surface treatment agent and strong-strength and low-modulus nanometer calcium carbonate for a silicone sealant, and relates to the technicalfield of preparation of nanometer calcium carbonate. The composite surface treatment agent is compounded from a surfactant, dimethyl silicone oil, fatty acid, sodium hydroxide, sapium fat and a silanecoupling agent. The preparation method of the strong-strength and low-modulus nanometer calcium carbonate for the silicone sealant comprises the following steps: performing procedures of calcination,slaking, filtering, cooling, primary carbonization, aging, secondary carbonization, surface treatment, pressure filtration dewatering, drying, crushing and the like on lime to obtain a product. The particle sizes of the prepared nanometer calcium carbonate are 20 to 30nm, particles are spherical, the nanometer calcium carbonate is high in dispersity and low in oil absorption, and is applied to preparation of the silicone sealant, the modulus of the silicone sealant is reduced, the tensile strength of the silicone sealant is remarkably enhanced, and the elongation at break of a silicone sealant material is increased.

Description

technical field [0001] The invention relates to the technical field of preparing nano-calcium carbonate, in particular to a method for preparing a composite surface treatment agent and a nano-calcium carbonate for high-strength and low-modulus silicone glue. Background technique [0002] As a new type of functional inorganic material, nano-calcium carbonate has ultra-fine particle size and high specific surface area so that it has quantum size effect, small size effect, surface effect and macroscopic quantum effect that ordinary inorganic fillers do not have. In addition, it has stable performance. , easy to process and low price, it is widely used in industries such as rubber and plastics, coating ink, paper making and silicone sealant. However, the surface of nano-calcium carbonate without surface modification is hydrophilic and oleophobic, and it is difficult to disperse uniformly in the composite material; and the specific surface area is large, the surface energy is hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/02C09C3/08C09C3/12
CPCC01P2004/32C01P2004/64C01P2006/19C01P2006/22C09C1/021C09C3/006C09C3/08C09C3/12
Inventor 张华张志宏张智伟李建永雷霆胡娟李军奇
Owner 江西势通钙业有限公司
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