Buoyancy material with composite sandwich damping structure and preparation technology of material

A buoyant material, composite structure technology, used in adhesive additives, synthetic resin layered products, non-polymer adhesive additives, etc.

Inactive Publication Date: 2014-04-09
QINGDAO ADVANCED MARINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

None of the above patents reported the preparation method of buoyancy material with sandwich damping composite structure

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  • Buoyancy material with composite sandwich damping structure and preparation technology of material

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Experimental program
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Effect test

Embodiment 1

[0023] Weigh 1200 grams of epoxy resin, 280 grams of epoxy reactive diluent, and 55 grams of silane coupling agent, put them into a pre-mixing tank equipped with a stirrer, stir the liquid materials evenly, and put them into 1100 grams of graded hollow The glass beads are pre-mixed, and the pre-mixed material is put into a 10-liter kneader, and kneaded for 15 minutes. Add 360 grams of 3,3 ， -Diethyl 4,4 , -Diaminodiphenylmethane, 150 grams of isophorone diamine curing agent, continue kneading for 60 minutes until the materials are mixed evenly. The discharged material is filled into a mold with an inner cavity size of 200×200×100mm, hot-pressed and solidified, and after demoulding, it is cured at 130°C for 4 hours to obtain a solid buoyancy material blank, which is machined into a buoyancy material module. Material density 0.517g / cm 3 , the uniaxial compressive strength is 34.2Mpa, the volume fraction of hollow glass microspheres is 64.0%

Embodiment 2

[0025] Take by weighing 180 grams of epoxy resin, 45 grams of epoxy reactive diluent, 11 grams of silane coupling agent, put into the premix tank equipped with agitator, stir the material evenly at room temperature, drop into 180 grams of graded The hollow glass microspheres are pre-mixed, and the pre-mixed material is put into a kneader and kneaded for 15 minutes. Add 136 grams of methyltetrahydrophthalic anhydride and 9 grams of 2-ethyl-4-methylimidazole catalyst, and continue kneading for 60 minutes until the materials are uniformly mixed. The discharged material is filled into a mold with an inner cavity size of 120×120×50mm, hot-pressed and solidified, and after demoulding, it is cured at 140°C for 4 hours to obtain a solid buoyancy material blank, which is machined into a buoyancy material module. Material density 0.515g / cm 3 , the uniaxial compressive strength is 31.6Mpa, and the volume fraction of hollow glass microspheres is 64.4%.

Embodiment 3

[0027] Preparation of damping coating: The damping layer is a polyether polyurethane elastomer, which is composed of two components A and B, component A is isocyanate prepolymer; component B is hydroxyl polyether, amine chain extender, silane Coupling agent, damping filler, etc.

[0028]

[0029] Preparation of component A:

[0030] Weigh 400 grams of D-2000 polyether polyol into a 1000ml three-necked bottle, heat to 100--110°C for vacuum dehydration for 1 hour. Cool down to below 60--70°C, put in 300g of MDI-50 polyisocyanate, heat to 80°C for prepolymerization for 2 hours, and place the material in a sealed container. Sampling and testing for free isocyanate content of 10%.

[0031] Preparation of component B:

[0032] Weigh the following components, and grind and disperse them evenly in a stirring grinding disperser to prepare component B.

[0033] Component B is based on 100 parts by mass of polyether polyol: D-2000 polyether polyol 100, amine chain extender 30, si...

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Abstract

The invention relates to a buoyancy material with a composite sandwich damping structure. The buoyancy material comprises a core material, a plane materiel and a damping coating, wherein the core material is a buoyancy material module; the buoyancy material module comprise epoxy resin, an epoxy reactive diluent, a curing agent, a silane coupling agent and hollow glass beads. The solid buoyancy material module is formed by the processes of premixing, kneading, mould pressing, curing and cutting into solids; the plane material is high-rigidity fiber-enhanced epoxy glass steel, sheet steel or an aluminium alloy plate; the damping coating is a polyether urethane elastomer which is coated between the core material and the core material, between the core material and the plane material, and between the plane material and the plane material. By adopting the buoyancy material disclosed by the invention, the traditional buoyancy material has higher waterproof sealing property and damping property, so that the solid buoyancy material is wider in application range.

Description

technical field [0001] The invention relates to a polymer-based lightweight composite material, in particular to a sandwich damping composite structure buoyancy material and a preparation process thereof. Background technique [0002] At present, in aviation, aerospace, navigation and other engineering fields, the demand for composite materials with low density, high stiffness, and large damping is increasing. Because sandwich composite materials have good specific stiffness, specific strength, and large damping characteristics, they are widely used. It is used in the field of vibration reduction, sound absorption and buoyancy of ships and submersibles. With the continuous development of damping and vibration reduction technology, the free damping coating gradually develops into constrained damping coating structure and inserted damping coating structure. The damping laying form has also developed from single-layer damping to multi-layer damping structure, and the interva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/18B32B27/38B32B7/12C09J175/08C09J11/04C09J11/06C08G18/66C08G18/48
Inventor 刘连河张树华魏浩张茂伟王德威王祖华黄加强武莉
Owner QINGDAO ADVANCED MARINE MATERIAL TECH
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