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A poss modified high toughness solid buoyancy material and preparation method thereof

A technology of solid buoyancy and high toughness, applied in the field of solid buoyancy materials, it can solve the problem that buoyant materials cannot be uniformly dispersed

Active Publication Date: 2021-04-02
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problem that the traditional toughening agent cannot be uniformly dispersed inside the buoyancy material, and to provide a POSS-modified high-toughness solid buoyancy material and its preparation method

Method used

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  • A poss modified high toughness solid buoyancy material and preparation method thereof
  • A poss modified high toughness solid buoyancy material and preparation method thereof
  • A poss modified high toughness solid buoyancy material and preparation method thereof

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preparation example Construction

[0035] A preparation method of a POSS-modified high-toughness solid buoyancy material, comprising the steps of:

[0036] (1) Dissolve a certain amount of POSS for surface modification of hollow glass microspheres in ethanol solution, then add an appropriate amount of hollow glass microspheres into the solution, mechanically stir at 20rpm / min at 50°C for 1h and ultrasonically disperse After 10 minutes, vacuum filter, dry, and sieve to obtain POSS surface-modified hollow glass microspheres, which are set aside.

[0037] (2) After dissolving a certain amount of POSS for epoxy resin modification with tetrahydrofuran, add it to the epoxy resin, and mechanically stir at 10rpm / min at 80°C for 4h. After the tetrahydrofuran solvent is completely volatilized, POSS modified Epoxy resin matrix, spare.

[0038] (3) Add the curing agent and accelerator to the POSS-modified epoxy resin matrix prepared in step (2), and after mixing evenly, add the POSS surface-modified hollow glass microsphe...

Embodiment 1

[0043] According to the mass percentage, get 100 parts of bisphenol A type epoxy resin E44, modify with 10 parts of epoxy resin modified heptaisooctyl single epoxy group POSS according to the above method; get 30 parts of S15 hollow glass of 3M company The microspheres were modified with 10 parts of heptaisooctyltrisilyloxy POSS for surface modification of hollow glass microspheres. The POSS modified epoxy resin matrix made and the hollow glass microspheres of POSS surface modification, mix 90 parts of methyltetrahydrophthalic anhydride MeTHPA, 0.5 part of 2-ethyl-4-methyl Imidazole, made of POSS-modified high-toughness solid buoyancy material products.

Embodiment 2

[0045] According to the mass percentage, get 100 parts of bisphenol A type epoxy resin E51, modify with 10 parts of epoxy resin modified heptaisobutyl monoepoxy group POSS according to the above method; get 35 parts of K20 hollow glass of 3M company The microspheres were modified with 10 parts of heptaisooctyltrisilyloxy POSS for surface modification of hollow glass microspheres. The prepared POSS modified epoxy resin matrix and POSS surface modified hollow glass microspheres were mixed with 23 parts of isophorone diamine IPDA and 0.2 part of DMP-30 according to the above method to make POSS modified high Product of ductile solid buoyancy material.

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Abstract

The invention discloses a polyhedral oligomeric silsesquioxane (POSS)-modified high-toughness solid buoyancy material and a preparation method thereof. The solid buoyancy material comprises an POSS modified epoxy resin matrix and POSS-modified hollow glass microsphere filler dispersed in the matrix, wherein POSS for modifying epoxy resin contains epoxy groups capable of being used for a copolymerization reaction with resin, and the POSS for modifying hollow glass microspheres contains tri-silicon hydroxyl groups which can be chemically bonded with the surfaces of the hollow glass microspheres.The defect that a conventional toughening agent cannot be uniformly dispersed and is easily agglomerated in a buoyancy material is overcome, and the POSS with the epoxy groups is uniformly dispersedin a polymer network in a mode of copolymerization with the matrix resin. Meanwhile, the nano effect of the POSS particles is exerted, and dispersity and compatibility of the hollow glass microspheresin the resin matrix are improved, so that the solid buoyancy material has relatively high toughness, the elongation at break (material toughness) reaches 6-8%, the density is low to 0.45-0.6 g / cm<3>,compression strength is 25-50 MPa, and the water absorption rate is not more than 1%.

Description

technical field [0001] The invention relates to a solid buoyancy material for marine environment, in particular to a POSS-modified high-toughness solid buoyancy material and a preparation method thereof. Background technique [0002] Solid buoyancy material is an important marine special engineering material and one of the necessary materials for deep sea development. It plays a key role in improving the payload of ocean development equipment and realizing suspension positioning. At present, most solid buoyancy materials are brittle materials, which are easily damaged when they are bumped or impacted during underwater use, and need to be repaired or even replaced regularly, which affects the working efficiency of marine development equipment. Therefore, the large-scale promotion and application of solid buoyant materials in the marine field needs to give priority to solving the problem of toughness. [0003] The currently reported toughening methods for solid buoyant materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/10C08K9/06C08K7/28
CPCC08K7/28C08K9/08C08L83/10
Inventor 马志超郑劲东王跃平范国栋白师豪
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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