Bi-component polysulfide sealant and preparation method thereof

A polysulfide sealant, two-component technology, applied in chemical instruments and methods, non-polymer adhesive additives, adhesives, etc., can solve the problems of poor thermal degradation resistance and high density, and achieve thermal degradation resistance Excellent, good strength retention effect

Inactive Publication Date: 2012-08-01
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the problems of high density and poor thermal degradation resistance of existing sealants after vulcanization, and provides a two-component polysulfide sealant and its preparation method

Method used

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  • Bi-component polysulfide sealant and preparation method thereof
  • Bi-component polysulfide sealant and preparation method thereof
  • Bi-component polysulfide sealant and preparation method thereof

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Experimental program
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specific Embodiment approach 1

[0023] Specific embodiment one: The two-component polysulfide sealant of this embodiment is prepared from the following components in parts by weight:

[0024] Component A: 50-100 parts of high-viscosity liquid polysulfide rubber, 50 parts of low-viscosity liquid polysulfide rubber, 5-10 parts of epoxy resin, 5-15 parts of thixotropic agent, 20-60 parts of reinforcing filler, insulating glass 3-10 parts of microspheres, 5-10 parts of titanium dioxide, 0.5-1.5 parts of silane coupling agent, 2-6 parts of anti-aging agent; the anti-aging agent is propyl gallate;

[0025] Component B: 100 parts of manganese dioxide, 100-150 parts of plasticizer, 10-30 parts of talcum powder, 0.2-1.0 parts of diphenylguanidine;

[0026] During use, the weight proportion of component A and component B is: component A: component B=100: (10~15).

[0027] The raw materials used in the present invention are all commercially available products, wherein the hollow glass microspheres K1 and K15 are purch...

specific Embodiment approach 2

[0030] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the high-viscosity liquid polysulfide rubber is one or both of liquid polysulfide rubber JLY-155 and liquid polysulfide rubber G-112. Than combination. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Specific embodiment three: this embodiment is different from specific embodiment one or two in that: the low-viscosity liquid polysulfide rubber is one or both of liquid polysulfide rubber JLY-121 and liquid polysulfide rubber G-4 can be combined in any ratio. Others are the same as in the first or second embodiment.

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Abstract

Bi-component polysulfide sealant and a preparation method thereof relate to a high-polymer sealing material and a preparation method thereof and aim to solve the problems of high density and poor heatproof degradation performance of existing sealant after being sulfurized. A component includes liquid polysulfide rubber, epoxy resin, thixotropic agent, reinforcing filler, hollow glass microballs, titanium dioxide, silane coupler and antiager, B component includes manganese dioxide, plasticizer, talcum powder and melaniline. The preparation method includes: the A component is prepared by addingthe thixotropic agent, the titanium dioxide, the reinforcing filler and the antiager to grind after the liquid polysulfide rubber and the epoxy resin are pre-polymerized and then adding treated hollow glass microballs to grind; the B component is prepared by mixing and grinding the manganese dioxide, the plasticizer and the talcum powder and then adding the melaniline to grind. The bi-component polysulfide sealant with the density smaller than or equal to 1.3g/cm3 is not crispy and not viscous in flowing after thermal ageing at the temperature of 180 DEG C for 10 hours. The preparation methodis applicable to preparation of polysulfide sealant.

Description

technical field [0001] The invention relates to a polymer sealing material and a preparation method thereof. Background technique [0002] Due to its good process performance, excellent oil resistance, water resistance, low air permeability, weather resistance, chemical medium resistance, impact resistance and vibration resistance, polysulfide sealant has good adhesion to metals and non-metals. , Widely used in aviation, aerospace, shipbuilding, construction, automobile, electronic appliances and other industries. In the aviation industry, the density of the sealant affects the overall weight of the aircraft, which in turn affects its endurance. In the aviation industry, even weight reduction in grams is meaningful, and the temperature requirements for the sealant are also Higher than conventional sealants. [0003] Polysulfide sealant is a multi-component sealing material that is based on liquid polysulfide rubber as the main agent, adding appropriate fillers and additive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J181/04C09J163/00C09J11/04C09J11/06C09K3/10
Inventor 孙明明张斌张绪刚王磊李坚辉薛刚赵明李奇力
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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