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A kind of dual curing solvent-free polyurethane coil coating and preparation method thereof

A dual-curing, coil coating technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of high viscosity of gel and prepolymer systems, inconvenient production process, etc., to achieve cost reduction, good comprehensive performance, The effect of excellent wear resistance

Active Publication Date: 2019-10-29
JIANGSU LANLING POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the solvent-based coatings are directly converted to solvent-free coatings, the viscosity of the prepolymer system will be high due to the absence of solvent dilution, which will bring inconvenience to the production process, and the heat of reaction will cause the system to gel

Method used

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  • A kind of dual curing solvent-free polyurethane coil coating and preparation method thereof
  • A kind of dual curing solvent-free polyurethane coil coating and preparation method thereof
  • A kind of dual curing solvent-free polyurethane coil coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add 14.38gMDI and 0.1g bismuth-zinc composite catalyst (BiCAT8) into 100mL four-necked flask F 1 Finally, under the condition of maintaining 30 ° C after the nitrogen gas is stabilized, a mixed liquid of 5.71 g of polyoxypropylene diol with a molecular weight of 400 and 10.71 g of polyethylene glycol with a molecular weight of 1000 is gradually added to it, and the reaction is stirred at a speed of 1000 r / min. 1h, to obtain reactant A,

[0040] (2) Add 3.25 g of hydroxyethyl methacrylate to the reactant A obtained in step (1), stir and react at a speed of 800 r / min at 40°C for 1.5 hours to obtain a reactant mixture B, which is mainly one end Urethane acrylates containing isocyanate groups with a carbon-carbon double bond at the other end,

[0041] (3) Under a nitrogen atmosphere, add 0.52g of diglycerin and 0.01g of p-toluenesulfonic acid into a 100mL four-necked flask F 2 At 155°C, add 1.67g of bismethylolpropionic acid and 0.02g of p-toluenesulfonic acid, stir a...

Embodiment 2

[0049] Did not add diglyceryl dendrimer polyurethane prepolymer in the paint system; But the add-on of castor oil-based polyurethane prepolymer increases correspondingly, promptly the add-on in paint system becomes 45g; Other operation steps are identical with embodiment 1 .

Embodiment 3

[0051] Castor oil-based polyurethane prepolymer is not added in the coating system; but the addition of diglyceryl dendrimer polyurethane prepolymer increases accordingly, that is, the addition in the coating system becomes 45g; other operating steps are the same as in Example 1 .

[0052] Table 1: Performance comparison of the coating films of Examples 1 to 3

[0053]

[0054]

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Abstract

The invention belongs to the technical field of environment-friendly coil coatings and particularly relates to a dual-cured and solvent-free type polyurethane coil coating and a preparation method thereof. The coating product is prepared from components in percentage by mass as follows: 30%-42% of diglycerol based dendritic macromolecular polyurethane prepolymers, 10%-15% of castor oil based polyurethane prepolymers, 15%-27% of composite active monomers, 10%-22% of inorganic composite filler, 5%-10% of acetyl tributyl citrate, 3%-6% of an ultraviolet curing agent, 3%-10% of an aliphatic polyisocyanate curing agent, 2%-4% of hydroxyethyl methacrylate phosphate and 1%-5% of an epoxy silane coupling agent. The coating product is a solvent-free type environment-friendly coating, has good adhesive force, MEK (methyl ethyl ketone) scrubbing resistance and high-and-low-temperature resistance, and can be applied to coating and protection of various coiled materials.

Description

technical field [0001] The invention belongs to the technical field of environmentally friendly coil coatings, in particular to a dual-curing solvent-free polyurethane coil coating and a preparation method thereof. Background technique [0002] With the development of economy and progress of society, environmental and energy issues are becoming more and more prominent. People pay more and more attention to environmental protection and energy conservation, and hope that high-polluting solvent-based coatings can be replaced by low-VOC emission, non-toxic and environmentally friendly coatings. Compared with solvent-based coatings, solvent-free coatings have obvious advantages in that the synthesis process is environmentally friendly and the solid content of coating products is high; compared with water-based coatings, solvent-free coatings avoid the consumption of a large amount of heat energy when the water-based coating system removes water. However, if the solvent-based coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D187/00C09D175/14C09D7/61C09D7/63C08G81/00C08G18/48C08G18/67C08G63/664C08G63/66
Inventor 马金高晨阳吴润泽刘棋王桂银董文灏顾科毅
Owner JIANGSU LANLING POLYMER MATERIAL CO LTD
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