Water-based Anti-corrosion coating composition

A technology of composition and water-based coatings, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of increasing the complexity and duration of the formation process of corrosion-resistant coatings

Active Publication Date: 2018-11-23
SOLVAY SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Indeed, multi-step coating increases the complexity and duration of the corrosion resistant coating formation process on such large parts

Method used

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  • Water-based Anti-corrosion coating composition
  • Water-based Anti-corrosion coating composition
  • Water-based Anti-corrosion coating composition

Examples

Experimental program
Comparison scheme
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example 3

[0118] Use water (17.25 parts by weight), defoamer 035 (0.2 parts by weight), dispersant 151 (0.51 parts by weight), and A mixture of PE F87 surfactant (2.03 parts by weight) and AMP 95 neutralizer (0.51 parts by weight) was used as the liquid base. Will 10M0 (20.05 parts by weight), K-white 450H (5.07 parts by weight) and 130M (1.52 parts by weight) is dispersed therein and then supplemented with 52.76 parts by weight of P580 Latex.

[0119] Viscosity was adjusted by adding rheology modifier Rheolate 255 (0.1 parts by weight).

[0120] The PVC of this formulation is 30% vol, with a density of 1.39 g / l and a solids content of 60% wt.

[0121] The viscosity of this formulation was 3000 cP, its pH was 6.89, and its CCT was found to exceed 500 μm.

[0122] This example shows that a copolymer (VDC) latex which is very stable to dehydrochlorination and thus contains free chlorine in an amount less than 1000 ppm and which does not crystallize under coalescence / heating c...

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Abstract

The invention pertains to an aqueous coating composition comprising: an aqueous latex of a copolymer consisting essentially of recurring units derived (i) from vinylidene chloride (VDC), (ii) from vinyl chloride (VC), (iii) from one or more than one alkyl (meth)acrylate having from 1 to 12 carbon atoms in the alkyl group [monomer (MA)] and (iv) from one or more than one aliphatic alpha-beta unsaturated carboxylic acids [monomer (AA)], the proportion of recurring units derived from monomer (AA) being of at least 1.0 wt %, with respect to the total weight of the copolymer [copolymer (A)], wherein: (A) the said copolymer (A) is stable against dehydrochlorination, in a manner such that the total chloride content of the solid residue of the aqueous latex, after thermal treatment at about 120 DEG C for 2 hours, is of less than 1000 ppm, with respect to the total weight of the copolymer (A); (B) the said copolymer (A) does not to undergo any significant crystallization upon heating, in a manner such that the ratio of (j) its crystallinity index (CI) after a thermal treatment involving heating at 60 DEG C for 48 hours to (jj) its crystallinity index before such thermal treatment (Clafter thermal treatment / CI before thermal treatment) is less than 1.15; and at least one anti-corrosion pigment comprising an aluminium salt of a (poly)phosphoric acid modified with an alkaline earth metal oxide [pigment (P)]; at least one non-ionic surfactant [surfactant (NS)]; and at least one inorganic filler [filler (I)] different from pigment (P), in an amount such that the overall pigment volume concentration (PVC), comprehensive of pigment (P) and filler (I), is comprised from 20 to 40 % vol., when determined with respect to the dried coating composition.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from European Application No. 16305299.6 filed on March 18, 2016, the entire content of which is hereby incorporated by reference for all purposes. technical field [0003] The present invention relates to aqueous coating compositions and methods for forming protective coatings on substrates, especially metal-containing substrates. More specifically, the present invention relates to coating compositions, methods, and coating systems involving aqueous coating compositions that can be applied at high coating thicknesses as a direct-to-metal coat, providing excellent finishing and corrosion protection. Background technique [0004] Aqueous or water-based coating compositions for protective coatings of substrates, such as preventing corrosion or rusting of ferrous metals, are well known. [0005] Particularly advantageous are compositions that do not require any "baking" periods at temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/08C08K3/32C09D5/08
CPCC09D5/084C08K2003/327C09D127/08C08K3/32C08K5/32C09D7/61C09D7/70C09D7/45
Inventor 潘延中A.查普托特Y.范德维肯
Owner SOLVAY SA
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