Coating composition for corrosion proofing

A technology of anti-corrosion coatings and compositions, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as unsatisfactory effects

Inactive Publication Date: 2000-11-01
NIPPON PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the epoxy resin paint described in the above-mentioned patent publication has a compatibility problem between the cured resin composed of an epoxy resin and a curing agent, especially ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example

[0036] Fractional distillation of fractions with a boiling point in the range of 140-220°C from the decomposition oil obtained by thermal decomposition of naphtha, to obtain a decomposition oil fraction with a total amount of unsaturated components of 51%, a content of indenes of 70%, and a content of conjugated dienes of 0.5%. .

[0037] Subsequently, 5 g of phenol was added to 100 g of the above-mentioned decomposition oil fraction, and then 0.5 g of boron trifluoride-phenol complex was added, and after polymerization at 30°C for 3 hours, the catalyst was removed with aqueous caustic soda, washed with water, and then distilled Unreacted oil and oligomers were removed to obtain 56 g of petroleum resin (A).

[0038] The obtained resin had a softening point of 103°C, and as a result of analysis, it had 0.8 phenolic hydroxyl groups per molecule.

Embodiment 1

[0043] Add 100 parts of epoxy resins, 30 parts of titanium dioxide, 100 parts of talc, 100 parts of petroleum resin (A) obtained in the manufacturing examples, 20 parts of hydrocarbon plasticizers, 5 parts of anti-sagging agents, and xylene in the container 150 parts of an equal amount of mixed solvent of MIBK and hexanaphthene were mixed and stirred with a stirrer to decompose it to obtain the main agent. 80 parts (in terms of solid content) of a polyamide resin was added thereto as a curing agent, mixed and stirred to obtain an anticorrosion coating composition. Its composition and results are shown in Table 1.

Embodiment 2

[0044]

[0045] Compositions were prepared in the same manner as shown in Table 1. In the comparative example, the petroleum resin (B) of the comparative production example was used. The results are shown in Table 1.

[0046] Example

Compare

example

1

2

1

painted

material

Group

become

︵

Heavy

quantity

share

︶

epoxy resin (1)

100

100

100

Titanium dioxide

30

30

30

Talc

100

100

100

Petroleum resin (A) (2)

100

200

-

Petroleum resin (B) (3)

-

-

150

plasticizer (4)

10

10

10

Anti-sagging agent (5)

5

5

5

mixed solvent

150

150

150

Curing agent (solid content conversion) (6)

80

80

80

Impact resistance:

500g×30cm

qualified

qualified

to crack

...

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Abstract

An epoxy coating composition for corrosion proofing which comprises an epoxy resin (A), a curing agent (B), preferably an amine curing agent, and an aromatic petroleum resin (C) which is prepared by polymerizing a cracked oil fraction having a content for indenes of 60 to 90 wt.% in the presence of phenols and has phenolic hydroxyl groups less than 1.0 per one molecule thereof, wherein the content of the petroleum resin is 1 to 500 parts by weight relative to 100 parts by weight of the epoxy resin. The epoxy coating composition contains no tar and hence is usable for application to a part contacting with sea water.

Description

technical field [0001] The present invention is a substitute coating for tar-based epoxy resin coating, especially relates to an anti-corrosion coating composition that can be used for coating in parts in contact with seawater such as ballast water tanks of ships. technical background [0002] Conventionally, tar-based epoxy resin coatings have generally been used in anticorrosion coating compositions for ships, steel structures, and the like. This kind of paint has good corrosion resistance, water resistance, and chemical resistance, etc., but because it contains tar, there are problems in sanitation, and because the paint is black, maintenance and management are difficult, and the light is very dark in a closed place. , may be dangerous during operation. [0003] In recent years, non-tar-based epoxy resin coatings that use petroleum-based resins to replace tars have been gradually developed. The resin described in -52656 contains hydroxyl groups. In the examples of this ...

Claims

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Application Information

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IPC IPC(8): C09D5/08C09D157/02C09D163/00
CPCC09D163/00C08L95/00C08G59/00C08L57/02C09D5/08C09D157/02C08L63/00C08L2314/00
Inventor 佐藤尚武
Owner NIPPON PETROCHEMICAL CO LTD
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