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Irradiation-resistant single-component silane modified polyether sealant and preparation method thereof

A silane-modified polyether, one-component technology, applied in the field of sealants, can solve the problems of no anti-radiation agent added, more changes, faster changes, etc., to achieve narrow absorption range, strong environmental adaptability, The effect of high production efficiency

Inactive Publication Date: 2017-02-01
三友(天津)高分子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing sealants subjected to high-energy radiation will cause a series of structural changes such as chain scission or cross-linking reactions in polymer macromolecules. The increase in the form of change and the acceleration of the change will further lead to various aging phenomena happen, fail
At present, the existing sealant usually does not add anti-radiation agent (Table 1 Comparative Example 1) or uses barium sulfate as anti-radiation agent (Table 1 Comparative Example 2)

Method used

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  • Irradiation-resistant single-component silane modified polyether sealant and preparation method thereof
  • Irradiation-resistant single-component silane modified polyether sealant and preparation method thereof
  • Irradiation-resistant single-component silane modified polyether sealant and preparation method thereof

Examples

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preparation example Construction

[0025] A preparation method of a radiation-resistant one-component silane-modified polyether sealant, comprising the following steps:

[0026] The first step is to add 12-80% by weight of silicone-modified polyether base material, 0-45% plasticizer and 0.5-2% water remover (crosslinking agent) into the planetary mixer, Stirring at room temperature for 5 to 20 minutes at a stirring rate of 30 to 50 r / min to obtain a mixture;

[0027] In the second step, adding weight percentages to the mixture obtained in the first step is 0.5 to 5% titanium dioxide, 0 to 70% calcium carbonate, 0 to 10% white carbon black and 2 to 30% antibacterial The irradiation agent is stirred rapidly under vacuum conditions until the filler is completely dispersed, the stirring rate is 30-50r / min, and the dispersion rate is 500-1000r / min to obtain the mixed material;

[0028] The third step, finally, add 1 to 5% coupling agent by weight to the mixed material reacted in the second step above, stir in a vac...

Embodiment 1

[0033] (1) 30% by weight of silicone modified polyether base material I and 20% of silicone modified polyether base material II, 12% of plasticizer dioctyl phthalate and 0.5% The dewatering agent (cross-linking agent) A-171 was added in the planetary mixer, and stirred for 10 minutes under normal temperature conditions, and the stirring rate was 40r / min to obtain the mixture;

[0034] Among them, silicone modified polyether base material I is

[0035]

[0036] Silicone modified polyether base material Ⅱ is

[0037]

[0038] (2) Add weight percent to be respectively the mixed material of 2% titanium dioxide, 20% calcium carbonate, 4% white carbon black and 10% antiradiation agent cerium oxide in the above-mentioned mixture subsequently, rapidly under vacuum condition Stir until the filler is completely dispersed, the stirring speed is 40r / min, the dispersion speed is 800r / min, and the mixture is obtained;

[0039] (3) Finally, 1.5% by weight of coupling agent KH-550 was...

Embodiment 2

[0042] The specific operation method is the same as that of Example 1, except that cerium oxide is replaced by yttrium oxide in terms of the ratio of anti-radiation agent components.

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Abstract

The invention relates to an irradiation-resistant single-component silane modified polyether sealant and a preparation method thereof. The method comprises the steps that 12%-80% by weight of organosilicone modified polyether base material, 0%-45% by weight of plasticizer and 0.5%-2% by weight of water removal agent are added into a planetary mixer to be stirred for 5-20 minutes, and a mixture is obtained; then 0.5%-5% by weigh of titanium dioxide, 0-70% by weight of calcium carbonate, 0-10% by weight of white carbon black and 2%-30% by weight of irradiation-resisting agent are added, fast stirring is carried out under the vacuum condition till the filler is completely dispersed, and mixed materials are obtained; finally, 1%-5% by weight of coupling agent is added, vacuum stirring is carried out for 3-15 minutes, and then the finished sealant is prepared. Silane modified polyether elastomers are adopted as main materials, the irradiation-resisting agent is added, and the high-strength silane modified polyether sealant with irradiation resistance is prepared. The sealant is high in environmental adaptability and is widely applied to the high-energy radiation environments of the fields of electrommunication, chemical engineering, medicine, ships and the like.

Description

technical field [0001] The invention belongs to the technical field of sealants, in particular to a radiation-resistant single-component silane-modified polyether sealant and a preparation method thereof. The sealant of the invention has strong environmental adaptability and is widely used in high-energy radiation environments in various fields such as electronic communication, chemical industry, medicine, ships and the like. Background technique [0002] Silane-modified polyether sealant is a new type of sealant, which combines the advantages of silicone sealant and polyurethane sealant, water resistance, weather resistance, high elasticity, excellent bonding performance, wide adaptability to substrates, and does not contain organic solvents , Free -NCO groups and organotin compounds, fast cross-linking, full curing, no harmful gas emissions during curing, low VOC, environmentally friendly, surface can be painted, and no pollution to the substrate. In recent years, silane-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J171/00C09J11/04
CPCC08K2201/014C08L2201/08C08L2205/025C09J11/04C09J171/00C08L71/00C08K13/02C08K2003/2241C08K2003/265C08K3/36C08K2003/2213C08K2003/221
Inventor 赵苗李崇吴子刚李程吴玉昆张金平张卫军李建武邵凯
Owner 三友(天津)高分子技术有限公司