Polyurethane acrylic acid ester and preparation method and application thereof

A polyurethane acrylate and acrylate technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as heating, consumption, and unsuitability of heat-sensitive electronic circuit boards

Inactive Publication Date: 2012-06-20
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This curing method is relatively easy to implement, but the disadvantage is that heating is required, wh

Method used

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  • Polyurethane acrylic acid ester and preparation method and application thereof
  • Polyurethane acrylic acid ester and preparation method and application thereof
  • Polyurethane acrylic acid ester and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The raw material (II) hydroxyethyl methacrylate (HEMA) used in this embodiment, the raw material (III) is polyethylene glycol 400, the raw material (IV) is 2, 4 toluene diisocyanate, and the raw material dosage in this embodiment is the raw material (II): Raw material (III): Raw material (IV) = 1:1:2. The synthesis steps are as follows: add dehydrated raw material (III) into a dry three-necked round bottom flask, add dropwise raw material (IV) and dibutyltin laurate (catalyst) mixture under medium-speed stirring, (the dropping rate is 4 seconds / drop ). After the dripping is completed, the system is heated to 50°C, react for 4 hours until the isocyanate concentration does not change with time, and then slowly drip the raw material (II) into the system (the dripping rate is 4 seconds / drop). After the dripping is completed, The temperature of the system was raised to 80°C until the isocyanate concentration did not change with time, thereby obtaining the final product (I). ...

Embodiment 2

[0049] The amount of raw materials used in this example is raw material (II): raw material (III): raw material (IV): = 1:0:1, the synthesis step is: add raw material (IV) into a dry three-necked round bottom flask, and stir. Drop the mixture of raw material (II) and dibutyltin laurate (catalyst), (the dropping rate is 6 seconds / drop). After the dropping, the system is heated to 65°C and reacted for 5 hours until the isocyanate concentration does not change with time, so The final product (I) is obtained. The entire reaction is carried out in isolation of water (vapor) and under the protection of nitrogen or other non-reactive gases.

Embodiment 3

[0051] The raw material (IV) in this example is isophorone diisocyanate (IPDI), and the remaining raw materials and synthesis steps are the same as in Example 1. Compared with the TDI of Example 1, this example uses IPDI as the polyisocyanate component, the experimental conditions are better controlled, and the product storage stability is better, but the raw material price is slightly higher than that of TDI.

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Abstract

The invention relates to a polyurethane acrylic acid ester and a preparation method thereof, the application in the preparation of light/moisture double solidification shape-preserving paint and a light/moisture double solidification shape-preserving paint. The polyurethane acrylic acid ester of the present invention is a polyurethane with isocyanic acid group and (methyl) acrylic acid ester. The molecular chain of the polyurethane has isocyanic acid group except for (methyl) acrylic acid ester double bond. When illumination, the C-C double bonds of (methyl) acrylic acid ester undergo free radical polymerization under the photoinitiator effect for paint crosslinking solidification.

Description

Technical field [0001] The invention relates to a polyurethane acrylate, a preparation method thereof, and application in the preparation of light / moisture dual-curing conformal coatings. Background technique [0002] The protective coating applied on the printed circuit board of the soldered plug-in components is usually called conformal coating. It not only protects electronic products from harmful external environments, such as the corrosive effects of dust, moisture, chemicals, mildew, scratches, short circuits and other human operation errors, but also extends the life of electronic devices and improves the stability of use Therefore, the performance of electronic products is improved. [0003] The curing methods of conformal coatings are divided into light curing, thermal curing, moisture curing, electric curing and air curing. Light-curing conformal coatings have the advantages of fast curing speed, suitable for heat-sensitive substrates, low initial investment, low volati...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/48C08G18/32C09D175/16C09D7/12
Inventor 马其祥王建斌陈田安
Owner YANTAI DARBOND TECH
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