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Self-polishing marine antifouling paint composition comprising fibres and metal-containing co-polymers

A marine antifouling and composition technology, applied in the field of antifouling paint, can solve problems such as cracks and flakes

Inactive Publication Date: 2005-02-09
HEMPEL AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] While certain products based on the aforementioned patents and patent applications have been marketed, it has been noted that the integrity of acrylic metal salt binder based paints appears to change after a longer period of use, particularly at the waterline of ships where the cyclic action of seawater exposure and sun exposure produces significant mechanical stress, which often leads to cracks and flakes
[0008] Even though the mechanical properties of known acrylic metal salt-based paints appear to be entirely satisfactory after application (and after a short time) on surfaces such as boats, as disclosed in the examples therein, the painted boats Prolonged exposure during operation, especially to alternating cycles of sea water and sunlight, may cause certain defects

Method used

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  • Self-polishing marine antifouling paint composition comprising fibres and metal-containing co-polymers
  • Self-polishing marine antifouling paint composition comprising fibres and metal-containing co-polymers
  • Self-polishing marine antifouling paint composition comprising fibres and metal-containing co-polymers

Examples

Experimental program
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Effect test

preparation example Construction

[0253] Plate preparation

[0254] Acrylic panels (155 x 100 x 5 mm) were first coated with an 80 μm (dry film thickness, DFT) commercial vinyl tar primer (Hempanyl 16280 from Hempel's Marine Paints) applied by air spraying. After drying in the laboratory at room temperature for 12-36 h, the antifouling paint (commercial paint) was applied in the following manner. A template (acrylic plate (155 x 100 x 5 mm) with 4 holes (diameter = 41 mm)) was placed and fixed on top of the previously primed plate. Weigh the antifouling paint with viscosity adjusted to 70-75KU into one of the holes. The amount of antifouling paint weighed into the well corresponds to a final DFT of 250 μm or 450 μm (specified according to the specific example). The paint is spread along the surface of the hole by the circular motion of the plate. Four paints (one in each well) can be applied per plate. The samples were removed 1-1.5 h after the end of application. Plates were dried in the laboratory at ro...

Embodiment 1

[0321] Model paint composition B (without fibers) and model paint composition B1 (with fibers) were prepared as described above.

[0322] The fiber materials employed were Lapinus Rockfibre MS 600 from LapinusFibres and F PAC O 245 / 040 from Schwarzwalder Textil-Werke.

[0323] The model paints were subjected to blister box tests and the results obtained are summarized in Tables 1.1-1.2 (DFT 250 μm) and 1.3-1.4 (DFT 450 μm):

[0324] Table 1.1: Crack density, DFT 250 μm

[0325] Crack density observed after:

[0326] paint composition

[0327] 1 day 24(week) 29(week)

[0328] B (without fiber) 0 1 2

[0329] B1 (with MS 600 fiber) 0 0 0

[0330] B1 (with F PAC O 245 / 040 fibers) 0 0 0

[0331] Table 1.2: Crack size, DFT 250μm

[0332] Crack size observed after:

[0333] model paint composition

[0334] 1 day 24(week) 29(week)

[0335] ...

Embodiment 2

[0353] Model paint composition C (without fibers) and model paint composition C1 (with fibers) were prepared as described above.

[0354] The fiber materials employed were Lapinus Rockfibre MS 600 from LapinusFibres and F PAC O 245 / 040 from Schwarzwalder Textil-Werke.

[0355] The model paints were subjected to blister box tests and the results obtained are summarized in Tables 2.1-2.2 (DFT 250 μm):

[0356] Table 2.1: Crack density, DFT 250 μm

[0357] Crack density observed after the following time:

[0358] paint composition

[0359] 1 day 19 24 29 (week)

[0360] C (without fiber) 0 1 1 3

[0361] C1 (with MS 600 fiber) 0 0 0 0

[0362] C1 (with F PAC O 245 / 040 fibers) 0 0 1 1

[0363] Table 2.2: Crack size, DFT 250μm

[0364] Crack size observed after:

[0365] model paint composition

[0366] 1 day 19 24 29 (week)

[0367] C (withou...

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Abstract

The present invention provides a self-polishing marine antifouling paint composition comprising: i) at least one binder co-polymer comprising at least one side chain bearing at least one terminal group of formula (I), wherein X is (a), (b), (c), (d); p is 1 or, if X is -P(=O)<, p is 2; M is a metal whose valency is 2 or more; n is an integer of 1 or more with the proviso that n + 1 always equals the metal valency; L is an organic acid residue, or L is -OH, or combinations thereof; and fibres. The composition shows improvement of the properties with respect to integrity of the paint film after long term use and in particular when exposed to alternate dry and wet.

Description

field of invention [0001] The present invention relates to antifouling paints capable of preventing the attachment and growth of undesired polluting organisms on submerged structures in contact with water, especially sea water. The present invention provides improved performance to such antifouling paints by incorporating specific types of fibers. Background of the invention [0002] Attachment and growth of marine organisms on submerged structures and hulls exposed to seawater and / or freshwater can cause serious economic losses as it increases friction (and thus fuel consumption) or increases wave or current resistance (for Static structures, such as offshore drilling rigs), and reduce possible operating times. [0003] The antifouling technology developed over the past few decades employs self-polishing antifouling compositions in which the polymer of the binder system is a trialkyl group of polymers containing carboxylic acid groups in the monomer segment. A tin derivat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/16
CPCC09D5/1687C09D5/165C09D5/16
Inventor S·A·科多拉H·S·埃尔布罗M·S·彼得森T·S·格拉温F·布赫瓦尔德
Owner HEMPEL AS
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