Polysiloxane long-acting lubricating protective paint with space environment resistance

A technology of polysiloxane and protective coatings, applied in coatings and other directions, can solve the problems of large initial mass loss, easy lubrication failure, and reduced reliability of inorganic coatings after atomic oxygen irradiation, and achieve excellent space environment resistance, Solve the effect of low adhesion, improve space environment resistance and wear resistance

Pending Publication Date: 2020-12-25
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN 2018115974781 (a long-term solid lubricating protective coating with excellent resistance to space environments) uses POSS modified organic binders to improve the space environment adaptability of organic coatings, but POSS modified organic coatings rely on surface polymerization. The exposed POSS is oxidized to form SiO after the amidoimide is corroded 2 The protective layer provides corrosion resistance, and the initial mass loss of atomic oxygen irradiation is large
In addition, Chinese patent CN201910305225.0 (an organic-inorganic composite lubricating protective coating material with excellent resistance to space environment) uses polytetrafluoroethylene modified polyphosphate as coating binder to improve the flexibility of inorganic coatings However, the polytetrafluoroethylene used in the modified polyphosphate will decompose into small molecules in the space environment, which is easy to lubricate and fail, which reduces the reliability of the application of the inorganic coating in the space environment

Method used

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  • Polysiloxane long-acting lubricating protective paint with space environment resistance
  • Polysiloxane long-acting lubricating protective paint with space environment resistance
  • Polysiloxane long-acting lubricating protective paint with space environment resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 A polysiloxane long-term lubricating protective coating with space resistance performance, the coating consists of 20g of epoxy-based polysiloxane resin, 18g of molybdenum disulfide slurry ground through a conical mill, 4,4 2 g of '-diaminodiphenyl sulfone is prepared by stirring at a speed of 2800r / min and dispersing evenly so that the solid content is 35±10%.

[0028] Wherein: epoxy-based polysiloxane resin refers to making by following method:

[0029] (1) Weigh according to the weight percentage of the following raw materials: 12g of γ-(2,3-glycidoxy)propyltrimethoxysilane, 6g of diphenyldimethoxysilane, 0.9g of dilute phosphoric acid with a mass concentration of 1% , absolute ethanol 20.55g, toluene 20.55g;

[0030] (2) Mix diphenyldimethoxysilane with diluent, heat to 65±5°C under oil bath conditions, then add dilute phosphoric acid, stir and hydrolyze at 65±5°C for 3 hours to obtain hydrolyzate;

[0031] (3) Add γ-(2,3-glycidoxypropoxy)propyltrimet...

Embodiment 2

[0032] Embodiment 2 A polysiloxane long-term lubricating protective coating with space-resistant environment performance, the coating consists of 20g of epoxy-based polysiloxane resin, 20g of molybdenum disulfide slurry ground through a conical mill, 4,4 6g of '-diaminodiphenyl sulfone was prepared by stirring at a speed of 3500r / min and dispersing evenly so that the solid content was 35±10%.

[0033] Wherein: epoxy-based polysiloxane resin refers to making by following method:

[0034] (1) Weigh according to the weight percentage of the following raw materials: 8g of γ-(2,3-glycidoxy)propyltrimethoxysilane, 8g of diphenyldimethoxysilane, 0.3g of dilute phosphoric acid with a mass concentration of 1% , absolute ethanol 1.85g, toluene 1.85g;

[0035] (2) Mix diphenyldimethoxysilane with diluent, heat to 65±5°C under oil bath conditions, then add dilute phosphoric acid, stir and hydrolyze at 65±5°C for 3 hours to obtain hydrolyzate;

[0036] (3) Add γ-(2,3-glycidoxypropoxy)pro...

Embodiment 3

[0037]Embodiment 3 A polysiloxane long-term lubricating protective coating with space resistance performance, the coating consists of 20g of epoxy-based polysiloxane resin, 10g of molybdenum disulfide slurry ground through a conical mill, 4,4 6g of '-diaminodiphenyl sulfone is prepared by stirring at a speed of 3000r / min and dispersing evenly so that the solid content is 35±10%.

[0038] Wherein: epoxy-based polysiloxane resin refers to making by following method:

[0039] ⑴Weigh according to the weight percentage of the following raw materials: 12g of γ-(2,3-glycidoxy)propyltrimethoxysilane, 11g of diphenyldimethoxysilane, 2.3g of dilute phosphoric acid with a mass concentration of 1% , absolute ethanol 9g, toluene 9g;

[0040] (2) Mix diphenyldimethoxysilane with diluent, heat to 65±5°C under oil bath conditions, then add dilute phosphoric acid, stir and hydrolyze at 65±5°C for 3 hours to obtain hydrolyzate;

[0041] (3) Add γ-(2,3-glycidoxypropoxy)propyltrimethoxysilane t...

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Abstract

The invention relates to a polysiloxane long-acting lubricating protective paint with space environment resistance. The paint is prepared by uniformly stirring and dispersing the following componentsin parts by weight: 20 parts of epoxy polysiloxane resin, 9-20 parts of disulfide compound slurry and 1.4-6 parts of amino curing agent at the rotating speed of 2800r / min and 3500r / min, so that the solid component content is 35 + / -10%. With the lubricating protective paint adopted, the space environment resistance and wear resistance of an existing space lubricating coating can be greatly improved. The protective paint has the characteristics of favorable adhesive force to the metal substrate, favorable flexibility, favorable impact resistance, long wear resistance, excellent space environmentresistance and the like, and can effectively prolong the service life of the related equipment in the space environment.

Description

technical field [0001] The invention relates to the technical field of lubrication protection, in particular to a polysiloxane long-term lubrication protection coating with space environment resistance performance. Background technique [0002] The lubricating materials used in the equipment serving in low-Earth orbit face the damage of the lubricating materials in the special space environment, resulting in the failure of space equipment lubrication. Lubrication failure is an important factor leading to short service life and low reliability of space equipment. Studies by NASA, European ESA and Russian Space Agency have shown that a considerable proportion (more than 30%) of space mechanical component failures are closely related to lubrication failures. Due to the effects of high vacuum, radiation and atomic oxygen in low-Earth orbit and other space environments, lubricating greases will creep, volatilize, and easily decompose or cross-link and deteriorate, and the applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D7/61C08G77/14
CPCC08G77/14C08K2003/3009C09D183/06C09D7/61C08K3/30
Inventor 陈磊赵志成李红轩周惠娣陈建敏
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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