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Moisture-curable antifouling coating composition

A moisture-curing, composition technology, used in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., to solve problems such as unusability, no chemical bond formation, and lack of reactivity

Inactive Publication Date: 2013-03-13
DOW GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lack of reactivity of this polysiloxane results in no chemical bond formation between the silane-terminated polyurethane A and the trimethylsilyl-terminated polysiloxane
The cured polymer blend exhibits stickiness and cannot be used in the field of non-stick coatings or anti-fouling or stain-releasing coatings

Method used

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  • Moisture-curable antifouling coating composition
  • Moisture-curable antifouling coating composition
  • Moisture-curable antifouling coating composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] 3.4 g of Gen 4 NOP1 with a hydroxyl equivalent weight of 170 g / mol and 0.93 g of carbo-hydroxyl-terminated PDMS (MCR-C62, with a hydroxyl equivalent weight of 2500 g / mol) were charged into a 250 mL round bottom flask and stirred mechanically. 5.3 grams of 3-isocyanatopropyltriethoxysilane (IPTES, 95% purity) and 4 grams of butyl acetate (analytical grade) were added to the round bottom flask. The mixture was stirred at 75°C under nitrogen protection. 0.1% by weight of dibutyltin dilaurate (DBTDL) catalyst was added. Continue to react until the characteristic peak of the isocyanate functional group in the infrared analysis spectrum disappears.

[0091] 5 grams of a silane-terminated NOP / PDMS solution (70% solids content) was mixed with 0.2% by weight p-toluenesulfonic acid. The solution was stirred uniformly for 20 minutes. Remove the thoroughly mixed solution from the mixer and let it sit for 2-5 minutes to remove most air bubbles. The above formulation components w...

Embodiment 2

[0103] In this example, silane-terminated polyurethane and silane-terminated polysiloxane were synthesized separately and then blended together to obtain a moisture-cured antifouling coating component.

[0104] Charge 3.4 g of Gen4NOP 1 into a 50 mL round bottom flask equipped with a mechanical stirrer. 5.2 grams of IPTES and 3.7 grams of butyl acetate were added to the round bottom flask. The mixture was stirred at 75°C under nitrogen protection. 0.1% by weight of DBTDL was added. Continue to react until the characteristic peak of the isocyanate functional group in the infrared analysis spectrum disappears.

[0105] Charge 25 g of MCR-C62 into a 100 mL round bottom flask equipped with a mechanical stirrer. 2.6 grams of IPTES was added to the round bottom flask. The mixture was stirred at 75°C under nitrogen protection. 0.1% by weight of DBTDL was added. Continue to react until the characteristic peak of the isocyanate functional group in the infrared analysis spectrum d...

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Abstract

The invention relates to a single-package moisture-curable composition. The composition comprises, on a basis of the dry weight of the composition, 10-99% of at least one silane-terminated polyurethane, and 1-90% of at least one silane-terminated polysiloxane, wherein at least one end group of the silane-terminated polyurethane polymer has a general formula of A-(CH2)m-SiR1n(OR2)3-n, A is an amine ester or urea connecting group, R1 is C1-12 alkyl, alkenyl, alkoxy, aminoalkyl, aromatic or (methyl) acrylic acid alkyloxy, R2 is a single substituted or non-substituted C1-18 alkyl or C6-C20 aromatic group, m is an integer of 1-60, and n is an integer of 0-1; the silane-terminated polysiloxane is polysiloxane with a hydrolyzable silane group, or a reaction product of at least one organic functionalized polysiloxane and at least one organic functionalized silane; after moisture curing of the composition, a surface with a water contact angle of more than 101 degrees can be formed. The composition is suitable for antifouling coatings, and can provide lower surface energy and better mechanical properties.

Description

technical field [0001] The present invention relates to a one-pack moisture-curing component that forms a polyurethane-polysiloxane-silicon (abbreviated PU-PDMS-Si) organic-inorganic hybrid network, resulting in a material with improved mechanical strength and extreme Good antifouling performance. The coating composition can be easily applied to the field of marine antifouling coatings. Background technique [0002] Antifouling coatings containing silicone elastomers have been developed for "self-cleaning" underwater parts of ships, which can effectively prevent the attachment of marine organisms and allow the attached marine organisms to be easily peeled off. Because polysiloxane has many special properties, such as high thermal stability, anti-ultraviolet and oxidation resistance, low surface energy, hydrophobicity and biocompatibility, it is widely used in marine antifouling coatings, among which polysiloxane is the most commonly used The oxane is polydimethylsiloxane (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/08C09D183/08C09D5/16
CPCC09D5/1662C08L83/04C08G18/718C08G18/36C08L75/04C09D5/16C09D175/04C09D183/04C09D5/14C09D5/1675
Inventor 陈红宇黄炎李艳香约翰·罗珀三世克里斯托弗·特克杰拉尔德·范德赞德张瑜
Owner DOW GLOBAL TECH LLC
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