Damping coating with interpenetrating network (IPN) structure, and preparation method of damping coating

An interpenetrating network structure and damping coating technology, applied in epoxy resin coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of short drying time, complicated laying, inapplicability, etc., and achieve short drying time and construction. Simple and good film-forming effect

Active Publication Date: 2018-05-01
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

The multi-layer structure design adopted by this technology is complicated to lay, and is only suitable for flat surface construction. For the narrow part of the power cabin and the multi-curved surface structure, this coating system is not suitable for use; in order to improve the shock and noise reduction effect of the damping coating Environmental protection requirements for ship cabins, European patent EP 1616454 (A2) discloses a water-based damping coating patent containing expanded microspheres with a short drying time. The expanded microspheres are products of Casco Nobel AB or Akezo Nobel and have a core-shell structure , the shell is composed of a small diameter grafted or crosslinked resin, the resin is usually thermoplastic, softenable and expandable, the shell contains a volatile substance, such as propane, n-butane, isobutane and other hydrocarbons, When heated, expand by the volatilization of hydrocarbons, the microspheres can improve the surface properties and damping effect of the coating film
The paint base is acrylic resin emulsion, styrene butadiene aqueous dispersion copolymer, polyurethane aqueous dispersion or a blend of at least two, and at the same time add a water-soluble high-boiling solvent, such as ethylene glycol or ethylene glycol Oligomers, etc., use the volatilization of the solvent during heating and curing to control the drying rate of the paint, which can make up for the long drying time of the water-based paint. The patented product needs to be heated and cured, and is not suitable for the room temperature curing construction process; CN101508758A discloses a A method for preparing an IPN damping material containing a hindered amine based on a polyurethane / vinyl resin interpenetrating polymer network. The IPN damping material prepared by the method has a wide damping temperature range, a high damping factor, and the damping temperature range is adjustable and soft. The hard segment is adjustable, but its curing and film formation process requires degassing and heating and curing, and it is also not suitable for the normal temperature coating construction process requirements of ship power cabins

Method used

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  • Damping coating with interpenetrating network (IPN) structure, and preparation method of damping coating
  • Damping coating with interpenetrating network (IPN) structure, and preparation method of damping coating
  • Damping coating with interpenetrating network (IPN) structure, and preparation method of damping coating

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preparation example Construction

[0035] A method for preparing a damping coating with an interpenetrating network structure, comprising the following steps: step 1, weighing each raw material according to the weight percentage of the raw material, then adding the weighed polyurethane resin and epoxy resin to a mixer to mix evenly, and adding Auxiliary agent, be mixed with polyurethane / epoxy resin base material solution; Step 2, pigment is joined in the polyurethane / epoxy resin base material solution that step 1 makes, stir 30min with the rotating speed of 3000r / min, control material temperature at 50 Below ℃, make a uniformly dispersed color paste solution; step 3, add damping filler and sound insulation filler to the color paste solution prepared in step 2 in turn, stir at a speed of 1500r / min for 30min, and then transfer to a sand mill , grinding to a slurry-like homogeneous liquid with a fineness not greater than 40 μm; step 4, adding the curing agent to the slurry-like homogeneous liquid prepared in step 3...

Embodiment 1

[0041] Polyether polyurethane resin 70g;

[0042] E12 epoxy resin 70g;

[0043] Toluene diisocyanate 70g;

[0044] Mica powder 39g;

[0045] Barite powder 48g;

[0046] Carbon black 1g;

[0047] Additives 6g (composed of BYK530, BYK320, BYK110 with a weight ratio of 1:1:1); the mass ratio of polyurethane resin / epoxy resin is 1:1.

[0048] A method for preparing a damping coating with an interpenetrating network structure, comprising the following steps: step 1, weighing each raw material according to the above weight percentage, then adding the weighed polyurethane resin and epoxy resin into a mixer to mix evenly, and adding Additives, formulated into polyurethane / epoxy resin binder solution;

[0049] Step 2. Add the pigment to the polyurethane / epoxy resin base material solution prepared in step 1, stir for 30 minutes at a speed of 3000r / min, and control the temperature of the material below 50°C to make a uniformly dispersed color paste solution;

[0050] Step 3: Add th...

Embodiment 2

[0055] 70g of hydroxyl-terminated polyurethane resin;

[0056] E20 epoxy resin 46g;

[0057] Diphenylmethane diisocyanate 52g;

[0058] Mica powder 42g;

[0059] Barite powder 51g;

[0060] Carbon black 1g;

[0061] Additive 6g; the mass ratio of polyurethane resin / epoxy resin is 1.5:1.

[0062] The operation steps of the preparation method are the same as in Example 1.

[0063] The supporting adhesion strength of the interpenetrating network damping coating reaches 8.3MPa, and the sound insulation of the coating is 28dB at f=2100Hz, and the damping performance is as follows: figure 2 As shown, the damping factor can reach up to 0.83.

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Abstract

The invention relates to a damping coating with an interpenetrating network (IPN) structure, and a preparation method of the damping coating. The damping coating is prepared from the following raw materials by weight percent: 20-30% of polyurethane resin, 5-30% of epoxy resin, 10-35% of a curing agent, 5-25% of damping filler, 10-40% of sound insulation filler, 0.1-5% of pigment and 1-10% of additives. The IPN type damping coating provided by the invention has a maximum damping factor reaching up to 0.83 within a range of 10-1000Hz (25 DEG C), and has a minimum sound reduction index value of 26dB within a range of 500-4000Hz. The damping coating prepared by the preparation method according to the formula has the interpenetrating polymer network structure and the high damping factor, and can be used for replacing the existing constrained damping structure type damping coating system in China.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a damping coating with an interpenetrating network structure and a preparation method thereof. Background technique [0002] Interpenetrating polymer network (IPN or IPNs for short) is a new type of polymer formed by linking two or more polymers through permanent physical interlocking rings of the cross-linked network. The damping performance of IPN materials mainly depends on the glass transition behavior of its components and the interaction and influence between components, which mainly reflects the compatibility between components and the interpenetration of crosslinked networks of different components. , The entanglement produces forced mutual dissolution and synergistic effects, so that the IPN material has the characteristics of macroscopic phase separation and microscopic phase separation. It is precisely because the components are in a semi-compat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D163/00C09D175/04C09D175/14C09D7/61
CPCC08K2003/2241C08K2003/3045C08L2205/04C09D163/00C09D175/04C09D175/08C09D175/14C08L63/00C08K13/02C08K3/34C08K3/30C08K3/04C08L75/08C08K13/04C08K7/28C08K7/14C08K3/22
Inventor 陈凯锋梁宇张黎黎亓海霞
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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