CA2015779A1 - Primer composition - Google Patents
Primer compositionInfo
- Publication number
- CA2015779A1 CA2015779A1 CA 2015779 CA2015779A CA2015779A1 CA 2015779 A1 CA2015779 A1 CA 2015779A1 CA 2015779 CA2015779 CA 2015779 CA 2015779 A CA2015779 A CA 2015779A CA 2015779 A1 CA2015779 A1 CA 2015779A1
- Authority
- CA
- Canada
- Prior art keywords
- pigment
- volume
- pigments
- corrosion
- salts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 63
- 239000000049 pigment Substances 0.000 claims abstract description 43
- 229920000180 alkyd Polymers 0.000 claims abstract description 27
- 238000005260 corrosion Methods 0.000 claims abstract description 23
- 239000003973 paint Substances 0.000 claims abstract description 18
- 150000003839 salts Chemical class 0.000 claims abstract description 17
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 11
- 235000021317 phosphate Nutrition 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 239000004615 ingredient Substances 0.000 claims abstract description 9
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 150000001642 boronic acid derivatives Chemical class 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000010452 phosphate Substances 0.000 claims abstract description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical class [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 6
- 239000004606 Fillers/Extenders Substances 0.000 claims abstract description 5
- 239000006185 dispersion Substances 0.000 claims abstract description 5
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims abstract description 4
- 239000002904 solvent Substances 0.000 claims abstract description 4
- 238000004040 coloring Methods 0.000 claims abstract description 3
- 239000000080 wetting agent Substances 0.000 claims abstract description 3
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 17
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 16
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 14
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 9
- ZADYMNAVLSWLEQ-UHFFFAOYSA-N magnesium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[Mg+2].[Si+4] ZADYMNAVLSWLEQ-UHFFFAOYSA-N 0.000 claims description 9
- 239000008096 xylene Substances 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000009472 formulation Methods 0.000 claims description 8
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 6
- 229910017052 cobalt Inorganic materials 0.000 claims description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 6
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 6
- 235000019792 magnesium silicate Nutrition 0.000 claims description 6
- 239000000391 magnesium silicate Substances 0.000 claims description 6
- JZNZSKXIEDHOBD-HUUCEWRRSA-N 2-[4,10-bis(carboxymethyl)-7-[(2r,3s)-1,3,4-trihydroxybutan-2-yl]-1,4,7,10-tetrazacyclododec-1-yl]acetic acid Chemical group OC[C@@H](O)[C@@H](CO)N1CCN(CC(O)=O)CCN(CC(O)=O)CCN(CC(O)=O)CC1 JZNZSKXIEDHOBD-HUUCEWRRSA-N 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 5
- 239000010428 baryte Substances 0.000 claims description 5
- 229910052601 baryte Inorganic materials 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims 3
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 abstract description 3
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 239000002987 primer (paints) Substances 0.000 description 61
- 210000003298 dental enamel Anatomy 0.000 description 10
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000010959 steel Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003349 gelling agent Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 phosphate salt Chemical class 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 241001435619 Lile Species 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000019612 pigmentation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- IOVGROKTTNBUGK-SJCJKPOMSA-N ritodrine Chemical compound N([C@@H](C)[C@H](O)C=1C=CC(O)=CC=1)CCC1=CC=C(O)C=C1 IOVGROKTTNBUGK-SJCJKPOMSA-N 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An anti-corrosion primer base paint composition comprising about 58% to 68% by volume (per total non-volatile) selected from the group comprising a blend of phenolic modified alkyd/
plasticizing alkyd and a blend of short and medium oil length non-modified alkyds and phenolic dispersion resins; about 8% to 12% by volume (per total non-volatile) anti-corrosion pigments selected from the group consisting of salts or borates and salts of phosphates, the weight ratio of salts of borates to salts of phosphate being between about 2:1 and 4:3; and the balance of the ingredients, as required, being selected from the group comprising of one or more of inert extenders, inert coloring pigments, anti-settling agents, anti-skinning agents, anti-wetting agents, paint driers and solvent blend. The primer composition in accordance with the present invention is designed as a non-toxic replacement for zinc chromate-containing primers.
An anti-corrosion primer base paint composition comprising about 58% to 68% by volume (per total non-volatile) selected from the group comprising a blend of phenolic modified alkyd/
plasticizing alkyd and a blend of short and medium oil length non-modified alkyds and phenolic dispersion resins; about 8% to 12% by volume (per total non-volatile) anti-corrosion pigments selected from the group consisting of salts or borates and salts of phosphates, the weight ratio of salts of borates to salts of phosphate being between about 2:1 and 4:3; and the balance of the ingredients, as required, being selected from the group comprising of one or more of inert extenders, inert coloring pigments, anti-settling agents, anti-skinning agents, anti-wetting agents, paint driers and solvent blend. The primer composition in accordance with the present invention is designed as a non-toxic replacement for zinc chromate-containing primers.
Description
201~779 BACKGROUND OF THE INVENTION
The present invention relakes to primer base paint compositions, and more particularly to a pigment mix for such compositions as well as resin systems which, in combination with such pigment mix, produce effective primers which may be applied to the surfaces of metals, such as galvanized steel, steel or aluminum to inhibit the spread of corrosion.
Primers representing traditional formulations are presently used as sur~ace conditioners to inhibit the spread of corrosion mainly for steel or light metals.
The corrosion inhibiting and metal substrate priming properties of such conventional chromate pigmented primers are based on the following components and functions thereof:
- chromate ions formed in the primer coating, on contact with moisture, provide corrosion inhibition of ferrous substrates; and - the oxidative properties of chromate ions tend to build up oxide layers on aluminium substrates thus improving their resistance to corrosive environments.
It is well known that the chromates which form an integral part of such conventional primer compositions are ~arcinogens, and as such pose a potential hazard or danger to the health of persons who are applying them or to persons who are working with metals that have been coated with them.
2015~79 In our co-pending Canadian Patent Application Serial No.
562,506, we have described and illustrated a formulation of chromate-free wash-primer comprising a mixture of polyvinyl butyl resin and an anti-corrosive pigment selected from salts of borates and salts of phosphates. The physical and application properties of that product are comparable to those of conventional chromate-containing wash-primers.
It is an object of the present invention to provide novel chromate-free primer formulations to be used for coating various metallic substrates and which provide comparable performance to conventional chromate-containing primer compositions.
8UNNARY OF T~E INVE~rION
In accordance with the present invention there is provided an anti-corrosion primer base paint composition comprising about 58% to 68% by volume (per total non-volatile) selected from the group comprising a blend of phenolic modified alkyd/
plasticizing alkyd and a blend of short and medium oil length non-modified alkyds and phenolic dispersion resins; about 8~ to 12% by volume (per total non-volatile) anti-corrosion pigments selected from the group consisting of salts or borates and salts of phosphates, the weight ratio of salts of borates to salts of phosphate being betwsen about 2:1 and 4~3; and the balance of the ingredients, as required, being selected from the group comprisin~
of one or more of inert extenders, inert coloring pigments, anti-201~73 settling agents, anti-skinning agents, anti-wetting agents, paint driers and solvent blend.
A suitable pigment mix, in accordance with the present invention, comprises the following ingredients in the following approximate concentrations by volume:
Anti-corrosion pigment 27 Yellow iron oxide 25 Magnesium silicate 22 Barium sulfate 9 Titanium dioxide 17 The primer composition in accordance with the present invention is designed as a non-toxic replacement for zinc chromate-containing primers. It can be used to protect both steel and aluminum alloys in marine or salt laden environments. It will be used on ships and aircraft as a replacement for a zinc chromate primer and a red lead primer. This primer is normally applied over wash primer (preferably also chromate-free) but can be applied directly to the metal surface. This primer is usually topcoated with a cosmetic alkyd topcoat. The physical and application properties of the product according to the present invention are comparable to those of conventional chromate containing primers.
PREPAR~TION
Two chromate-free primer formulations in accordance with the present invention have been prepared, each containing a similar ~5 formula of pigmentation mixed, in each case, with a different vehicle. Formula "A" contains a blend of phenolic modified alkyd/plasticiæing alkyd and Formula "B" contains a blend of short and medium oil length non-modified alkyds and phenolic dispersion resins. The percent by volume pigment mix ingredients for each formula are as follows:
Anti-corrosion pigment 26.70 Yellow iron oxide 25.34 Magnesium silicate 21.74 Barium sulfate 9.11 Titanium dioxide 17.11 100. 00 The anti-corrosion pigment was composed of the following percent ~by volume):
Heucophos XSP-H 40.00 (trade mark of Heubach Canada Ltd. - relating to a phosphate salt) Butrol 22 60.00 (trade mark of Busan Laboratories Ltd. - relating to a borate salt) In particular, the composition of the pigment mix according to the present invention is as follows:
Pigment Type Specific Gr. Volume % Weight %
Heucophos XSP-H 3.5 10.68 10.25 Butrol 22 3.7 16.02 16.08 Yellow Fe Oxide (1150A~ 4.05 25.34 27.84 Mg silicate (C-400) 2.8 21.74 16.51 Ba sulfate (Baryte #7) 4.35 9.11 10.75 Ti dioxide (2101) 4.0 17.11 18.57 100.00 100.00 10 This pigment mix has a specific gravity of 3.686.
A preferred formula for the vehicle for each of the primer compositions represented by Formula "A" and Formula "B" is as follows:
Formula AFormula B
Beckosol 12079 (50%) 64.28 Beckosol 12006 (50%) - 27.18 Beckosol AA 200 (60~) - 22.66 Paraplex RG-10 (100%) 2.89 CKU 2266 - 11.94 Bentone SD-l 0.63 1.29 Lead drier (24%) 0.53 0.41 Cobalt drier (6%) 0.13 0.10 Xylene 27.72 32.47 n-butanol 3.27 3.38 Duoemeen TDO 0.36 0.38 Exkin #2 0.19 0.19 100. 00100 . 00 A detailed formulation (volume percent) for chromate-free primer for each formula is as follows:
201~779 Formula AFormula B
Pigment Mix 37.91 38.45 Beckosol 12079 (50%)39.94 Beckosol 12006 (50%) - 16.58 Beckosol AA 200 (60%) - 13.82 Paraplex RG-10 (100%)1.79 CRU 2266 - 7.34 Bentone SD-l 0.39 0-79 Lead drier (24%) 0.311 0.316 Cobalt drier (6%) 0.079 0.079 Xylene 17.13 20.14 n-Butanol 2.10 2.13 Duoemeen TD0 0.23 0.24 Exkin #2 0.12 0.12 100.00 100.00 The formula for manufacturing "A" and "B" formula primers are given in two parts: a "grind" and a "letdown". This is traditional for most alkyd paint formulations. The manufacturing formula, without allowance for processed loss from the product, is given in weight (kg) and volume (litres) in order to allow for measuring the liquid components by volume as well as to calculate certain product parameters.
The following manufacturing formula is used for preparation of 100 litres of primer having formula "A":
Part I (qrind) % VOL. SP. GR. WT.
(1) Heucophos XSP-H 1.4683 3.5005.1391 (2) Butral 22 2.1789 3.7008.0619 (3) Yellow iron oxide (1150A) 3.4465 4.050 13.9583 (4) Magnesium silicate (C-400) 2.0563 2.800 8.2776 (5) Barium sulfate (Baryte #7) 1.2390 4.350 5.3897 (6) Titantum dioxide (2101) 2.3276 4.000 9.3104 (6) Bentone SD-l 0.3501 1.4700.5146 (7) Duomeen TDO 0.3633 0.8500.3088 (8) Beckosol 12079 (50%)18.6242 0.99518.5311 (9) Paraplex RG-10 2.4691 0.9592.3679 (10) Xylene 16.5859 0.869 14.4131 (10) n-Butanol 3.4274 0.811 2.7796 Sub-total 55.4366 89.0521 201~779 Part II (Letdown) (8) Beckosol 12079 (50%)34.4546 0.99534.2823 (11) Exkin #2 0.1643 0.940 0.1544 (10) X~lene 9.447~ 0.869 8.2360 (11~Lead drier, 24% naphtenate 0.3580 1.150 0.4117 (11)Cobalt drier, 6% naphtenate 0.1089 0.945 0.1029 Sub-total 44.5634 43.1873 TOTAL 100.0000 132.2393 Care must be taken during the manufacturing process not to degrade the polymeric binder by using excessive shearing forces and temperature while grinding the pigments to the correct fineness. This can be achieved using a manufacturing vessel equipped with a cooling mantle.
In preparing primer having the formula "A", pigments and extenders are charged into the production vessel equipped with a cooling mantle, followed by Bentone SD-l (trade mark of NL
Chemicals) gellant, xylene and Duomeen TDO (trade mark of Armak Chemicals Ltd.), dissolved in n-butanol. While agitating slowly until the blend is homogenous, the resins are added and the components are ground until the required fineness of grind (Hegman scale ~) is achieved. The mixture is diluted with the "letdown" in the order indicated and stirred for half-hour.
Table 1 is a breakdown of the primer composition of formula "A", thus manufactured, in accordance with conventional alkyd paint characteristics:
2~1~779 TABLB
__ _ TOTAL NV VEHICLE PIGMENT ADDITIVES V~ATILES
__~no ¦~w~ L volum~ ¦ wo;gh~ vol~o ¦ woiqhl v~ hL _voll.uno ¦ woiQht ~sin(50%) 5307 52 a 2653 264 2653 26.4 Pi~nLsl3.62 50.l4 13.6250.14 Additivos 3.81 3.85 3.65 3.70 0.l6 0.l5 Volalilss ~9.5 25.43 29.5 25.42 TOT~L1~.00 132.2026.5326.40l3.6250.l4 3.653.70 56.l9 5197 C~4 5 b c d ~ r ~h _ ~ i Calculated Parameters of Formula "A"
Non-volatile LNV) by wt.:
(d + f + h) x 100 . 100 = (26.4 + 50.14 + 3.70) x 100 100 =80.24 Non-volatile (NV) by vol:
(c + e + g) x 100 . 100 = (26.53 + 13.62 + 3.65) x 100 . 100 =43.8%
Specific Gravity:
b . a = 132.2 . 100 = 1.322 Vehicle solids ~b.w.):
d(100) . d + j = 76.4(100) . 26.4 + 51.97 = 33.7 Vehicle solids (by vol):
c(100) (c + i) = 26.53 x 100 . (26.53 + 56.19) = 32~1%
Pioment volume concentration (PVC bY wt.) f(100) . (f + d + h) = (50.14 x 100) . 50.14 + 26.4 + 3.7 =62.5%
Piqment volume concentration (PVC by vol.) e(100) . (e + c + g) = (13.62 x 100) . 13.62 + 26.53 + 3.65 = 31.1%
To manufacture a primer composition of formula "B", the following ingredients:
2~15779 g Part I (grind) ~ VOL. SP. GR. WT.
(1) Heucophos XSP-H 1.4699 3.5005.1447 (2) Butral 22 2.1813 3.7008.070 (3) Yellow iron oxide (1150A) 3.4502 4.050 13.9733 (4) Magnesium silicate (C-400) 2.9595 2.800 8.2866 (5) Barium sulfate (Baryte #7) 1.2404 4.350 5.3897 (6) Titantum dioxide (401) 2.3301 4.000 9.3204 (6) Bentone SD-l 0.7011 1.4701.0306 (7) Duomeen TDO 0.3637 0.8500.3091 ln (8) Beckosol AA200 18.0359 1.00018.0359 (10) Xylene 20.1618 0.869 17.5206 (10) n-Butanol 3.4311 0.811 2.7826 Sub-total 56.3250 89.8703 Part II (Letdown~
(8) Beckosol 12006 22.3124 0.97021.6430 (12) CKU-2266 10.6497 0.~00 9.5847 (11) Exkin ~2 0.1645 0.940 0.1546 (10) Xylene 10.0810 0.869 8.7604 (11)Lead drier, 24~ naphtenate 0.3584 1.150 0.4122 (11)Cobalt drier, 6% naphtenate 0.1090 0.945 0.1030 Sub-total 43.6750 40.6597 TOTAL 100.0000 130.5300 Pigments and extenders are placed into the production vessel, equipped with cooling mantle, followed by Bentone SD-l (trade mark) gellant, xylene and Duomeen TDO (trade mark), dissolved in n-butanol. While agitating slowly until the blend is homogenous; the resin is added and the components are ground until the required fineness of grind (Hegman scale 6) is achieved. The mixture is diluted with the alkyd resin and solvent and while stirring the dispersion resin is added and the blend vigorously agitated for 3 hours. Finally the driers and antiskinning agent are mixed in.
Table 2 is a breakdown of the primer composition of formula "Bll, thus manufactured, in accordance with conventional alkyd paint characteristics:
= TO ~L NVVEI ~ICLE PIG~ Ir A~I1 IVES VOL~ ILES
. volums w~i~L volum~ w~ighl volum~ w~i~hl ~l~mo w~i~l ~lum3 w~i~l R~sin ~0~ - !8.05 IB.04 10.a3 12.56 7.22 6.27 Rosin -50% 22.32 21.64 11.16 12.83 1,1.16 9.69 10.65 9 ~ _5.33 5.32 5.33 4.63 Piqm~n~13.63 50.20 13.6350.19 Addiliv~s 1.67 2.00 . 1.67 2.00 Vo1~Liles 33 .68 29 .07 33 .67 29.06 r~J~ -I oo.oo 1~0.53 _27.31 30.71 13.6350.19 1.67 ? ~ 57.38 4965 ~K~_ ~ b c d ~ r q h i i Calculated Parameters of ~ormula "B":
Non-volatile (NV) by wt.:
(d + f + h) x lO0 . lO0 = (30.71 + 50.19 + 2.0) x 100 . 100 =82.9%
Non-volatile (NV) by vol.:
(c + e + g) x 100 . 100 = (27.31 + 13.63 + 1.67) x lO0 . 100 =42.6%
Specific Gravity:
b . a = 130.5 . 100 = 1.305 g/cc Vehicle solids (b.w.):
d(100) . d + j = 30.71 (100) . 30.71 + 49.65 = 38.2%
Vehicle solids (by vol.):
c(100) . (c + i) = 27.31 x 100 . (27.31 + 57.38) = 3~.2%
Piqment volume concentration (PVC by wt.):
f(lOO~ . (f + d + h) = (50.19 x 100) . 50.19 + 30.71 + 2.0 =60.5%
201~779 Pigment volume concentration (PVC by vol.):
e(100) . (e + c ~ g) = (13.63 x 100) - 13.63 + 27.31 + 1.67 = 32.0%
TE~TING OF THE FINAL FORMULATIONS
The two primer compositions of formula "A" and "B", 5 manufactured as previously indicated, were applied over diagonally scored steel and aluminium (6061) panels and tested for corrosion resistance in paint systems in a salt-spray chamber.
The paint systems used in the test included priming of the substrate with chromate wash-primer lGP-121* and with chromate-10 free wash-primer with a working code of "17A". The paint systems used in the corrosion test are presented in Tables 3 and 4. The corrosion test of the panels was set for 300 hrs.
TABI.B 3 (Al 6061 substrate panels, in triplicate) PAINT SYSTEMS NO. OF AVERAGE ~ PANEL
COATS DFT.(um) CODING
lGP-121* wash-primer 1 8-10 Test Primer "A" 1 35-45 ] Al/lA
lGP-61M* alkyd enamel 1 20-25 ]
~17AII chromate-free 1 8-10 wash-primer ]
Test primer "A" 1 35-45 ] Al/2A
lGP-61M8* alkyd enamel 1 20-25 ]
25 * = Trade Mark 201~779 PAINT SYSTBMS NO. OF AVERAGE ~E~ PANEL
COATS DFT.fum) CODING
lGP-121 wash-primer 1 8-10 ]
Test primer "B" 1 35-45 ] Al/lB
lGP-61M alkyd enamel 1 20-25 ]
"17A" chromate-free 1 8-10 ]
wash-primer ]
Test primer "B" 1 35-45 ] Al/2B
lGP~61M alkyd enamel 1 20-25 ]
(Steel substrats panels, in triplicate) PAINT SYSTEMS NO. OF AVERAGE ~E~ P~
COATS DFT.(~m) CODING
No wash-primer Test primer "A" 1 35-45 ] St/lA
lGP-61M alkyd enamel 1 20-25 ]
lGP-121 wash-primer 1 8-10 ]
Test primer "A" 1 35-45 ] St/2A
lGP-61M alkyd enamel 1 20-25 ]
''17AI' chromate-free 1 8-10 ]
wash-primer ]
Test primer "A" 1 35-45 ] St/2A
lGP-61M alkyd enamel 1 20-25 ]
No wash-primer Test primer "B" 1 35-45 ] St/lB
lGP-61M a.lkyd enamel 1 20-25 ]
lGP-121 wash-primer 1 8-10 ]
Test primer "B" 1 35-45 ] St/2B
lGP-61M alkyd enamel 1 20-25 ]
"17A" chromate-free 1 8-lo ]
wash-primer ]
Test primer "B" 1 35-45 ] St/3B
lGP-61M alkyd enamel 1 20-25 ]
Results of the salt spray test are presented in Table 5.
201~779 TAB~E 5 Results of salt spray test - 300 hrs Average corrosion rating on aluminium Sample Blistering Fail Surface Total Code From Rust Aver.
Score Al/lA 100 100 100 300 Al/2A 100 80 100 280 Al/lB 100 100 100 300 Al/2B 100 83 100 283 Average corrosion rating on steel St/lA 100 90 100 290 St/2A 100 90 100 290 St/3A 100 90 100 290 St/lB 100 90 100 290 St/2B 100 90 100 290 St/3B 100 90 100 290 The test of steel substrate did not reveal any difference between the systems with or without wash primers, and attained the high rating of "29" (maximum possible "30"). The same systems applied over 6061 aluminium were slightly less effective for chromate-free wash primer. Chromate-free test primers, "A" and "B" both had an equal rating of "28" on chromate-free wash primer, as opposed to "30" on chromate pigmented wash primer.
In using the composition according to the present invention, only a thir, wet, semi-transparent coat should be applied. The wet film thickness to achieve a recommended dry film thickness of 20 - 25 ~m should be approximately 46 to 57 ~m for 201~779 primer formula "A" and 47 to 59 ~m for primer formula "B". The coating has a spreading rate, at the recommended dry film thickness, of 0.051 L/m2, and a drying time at 25C of about 2 hours, to recoat.
Thus, it can be seen that primer compositions of formula "A" and formula "B" have superior anti-corrosion characteristics comparable to those of chromate wash-primers.
Thus it is apparent that there has been provided in accordance with the invention a primer base paint composition that fully satisfies the objective, aims and advantages set forth above.
While the invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications and variations as fall within the spirit and broad scope of the invention.
The present invention relakes to primer base paint compositions, and more particularly to a pigment mix for such compositions as well as resin systems which, in combination with such pigment mix, produce effective primers which may be applied to the surfaces of metals, such as galvanized steel, steel or aluminum to inhibit the spread of corrosion.
Primers representing traditional formulations are presently used as sur~ace conditioners to inhibit the spread of corrosion mainly for steel or light metals.
The corrosion inhibiting and metal substrate priming properties of such conventional chromate pigmented primers are based on the following components and functions thereof:
- chromate ions formed in the primer coating, on contact with moisture, provide corrosion inhibition of ferrous substrates; and - the oxidative properties of chromate ions tend to build up oxide layers on aluminium substrates thus improving their resistance to corrosive environments.
It is well known that the chromates which form an integral part of such conventional primer compositions are ~arcinogens, and as such pose a potential hazard or danger to the health of persons who are applying them or to persons who are working with metals that have been coated with them.
2015~79 In our co-pending Canadian Patent Application Serial No.
562,506, we have described and illustrated a formulation of chromate-free wash-primer comprising a mixture of polyvinyl butyl resin and an anti-corrosive pigment selected from salts of borates and salts of phosphates. The physical and application properties of that product are comparable to those of conventional chromate-containing wash-primers.
It is an object of the present invention to provide novel chromate-free primer formulations to be used for coating various metallic substrates and which provide comparable performance to conventional chromate-containing primer compositions.
8UNNARY OF T~E INVE~rION
In accordance with the present invention there is provided an anti-corrosion primer base paint composition comprising about 58% to 68% by volume (per total non-volatile) selected from the group comprising a blend of phenolic modified alkyd/
plasticizing alkyd and a blend of short and medium oil length non-modified alkyds and phenolic dispersion resins; about 8~ to 12% by volume (per total non-volatile) anti-corrosion pigments selected from the group consisting of salts or borates and salts of phosphates, the weight ratio of salts of borates to salts of phosphate being betwsen about 2:1 and 4~3; and the balance of the ingredients, as required, being selected from the group comprisin~
of one or more of inert extenders, inert coloring pigments, anti-201~73 settling agents, anti-skinning agents, anti-wetting agents, paint driers and solvent blend.
A suitable pigment mix, in accordance with the present invention, comprises the following ingredients in the following approximate concentrations by volume:
Anti-corrosion pigment 27 Yellow iron oxide 25 Magnesium silicate 22 Barium sulfate 9 Titanium dioxide 17 The primer composition in accordance with the present invention is designed as a non-toxic replacement for zinc chromate-containing primers. It can be used to protect both steel and aluminum alloys in marine or salt laden environments. It will be used on ships and aircraft as a replacement for a zinc chromate primer and a red lead primer. This primer is normally applied over wash primer (preferably also chromate-free) but can be applied directly to the metal surface. This primer is usually topcoated with a cosmetic alkyd topcoat. The physical and application properties of the product according to the present invention are comparable to those of conventional chromate containing primers.
PREPAR~TION
Two chromate-free primer formulations in accordance with the present invention have been prepared, each containing a similar ~5 formula of pigmentation mixed, in each case, with a different vehicle. Formula "A" contains a blend of phenolic modified alkyd/plasticiæing alkyd and Formula "B" contains a blend of short and medium oil length non-modified alkyds and phenolic dispersion resins. The percent by volume pigment mix ingredients for each formula are as follows:
Anti-corrosion pigment 26.70 Yellow iron oxide 25.34 Magnesium silicate 21.74 Barium sulfate 9.11 Titanium dioxide 17.11 100. 00 The anti-corrosion pigment was composed of the following percent ~by volume):
Heucophos XSP-H 40.00 (trade mark of Heubach Canada Ltd. - relating to a phosphate salt) Butrol 22 60.00 (trade mark of Busan Laboratories Ltd. - relating to a borate salt) In particular, the composition of the pigment mix according to the present invention is as follows:
Pigment Type Specific Gr. Volume % Weight %
Heucophos XSP-H 3.5 10.68 10.25 Butrol 22 3.7 16.02 16.08 Yellow Fe Oxide (1150A~ 4.05 25.34 27.84 Mg silicate (C-400) 2.8 21.74 16.51 Ba sulfate (Baryte #7) 4.35 9.11 10.75 Ti dioxide (2101) 4.0 17.11 18.57 100.00 100.00 10 This pigment mix has a specific gravity of 3.686.
A preferred formula for the vehicle for each of the primer compositions represented by Formula "A" and Formula "B" is as follows:
Formula AFormula B
Beckosol 12079 (50%) 64.28 Beckosol 12006 (50%) - 27.18 Beckosol AA 200 (60~) - 22.66 Paraplex RG-10 (100%) 2.89 CKU 2266 - 11.94 Bentone SD-l 0.63 1.29 Lead drier (24%) 0.53 0.41 Cobalt drier (6%) 0.13 0.10 Xylene 27.72 32.47 n-butanol 3.27 3.38 Duoemeen TDO 0.36 0.38 Exkin #2 0.19 0.19 100. 00100 . 00 A detailed formulation (volume percent) for chromate-free primer for each formula is as follows:
201~779 Formula AFormula B
Pigment Mix 37.91 38.45 Beckosol 12079 (50%)39.94 Beckosol 12006 (50%) - 16.58 Beckosol AA 200 (60%) - 13.82 Paraplex RG-10 (100%)1.79 CRU 2266 - 7.34 Bentone SD-l 0.39 0-79 Lead drier (24%) 0.311 0.316 Cobalt drier (6%) 0.079 0.079 Xylene 17.13 20.14 n-Butanol 2.10 2.13 Duoemeen TD0 0.23 0.24 Exkin #2 0.12 0.12 100.00 100.00 The formula for manufacturing "A" and "B" formula primers are given in two parts: a "grind" and a "letdown". This is traditional for most alkyd paint formulations. The manufacturing formula, without allowance for processed loss from the product, is given in weight (kg) and volume (litres) in order to allow for measuring the liquid components by volume as well as to calculate certain product parameters.
The following manufacturing formula is used for preparation of 100 litres of primer having formula "A":
Part I (qrind) % VOL. SP. GR. WT.
(1) Heucophos XSP-H 1.4683 3.5005.1391 (2) Butral 22 2.1789 3.7008.0619 (3) Yellow iron oxide (1150A) 3.4465 4.050 13.9583 (4) Magnesium silicate (C-400) 2.0563 2.800 8.2776 (5) Barium sulfate (Baryte #7) 1.2390 4.350 5.3897 (6) Titantum dioxide (2101) 2.3276 4.000 9.3104 (6) Bentone SD-l 0.3501 1.4700.5146 (7) Duomeen TDO 0.3633 0.8500.3088 (8) Beckosol 12079 (50%)18.6242 0.99518.5311 (9) Paraplex RG-10 2.4691 0.9592.3679 (10) Xylene 16.5859 0.869 14.4131 (10) n-Butanol 3.4274 0.811 2.7796 Sub-total 55.4366 89.0521 201~779 Part II (Letdown) (8) Beckosol 12079 (50%)34.4546 0.99534.2823 (11) Exkin #2 0.1643 0.940 0.1544 (10) X~lene 9.447~ 0.869 8.2360 (11~Lead drier, 24% naphtenate 0.3580 1.150 0.4117 (11)Cobalt drier, 6% naphtenate 0.1089 0.945 0.1029 Sub-total 44.5634 43.1873 TOTAL 100.0000 132.2393 Care must be taken during the manufacturing process not to degrade the polymeric binder by using excessive shearing forces and temperature while grinding the pigments to the correct fineness. This can be achieved using a manufacturing vessel equipped with a cooling mantle.
In preparing primer having the formula "A", pigments and extenders are charged into the production vessel equipped with a cooling mantle, followed by Bentone SD-l (trade mark of NL
Chemicals) gellant, xylene and Duomeen TDO (trade mark of Armak Chemicals Ltd.), dissolved in n-butanol. While agitating slowly until the blend is homogenous, the resins are added and the components are ground until the required fineness of grind (Hegman scale ~) is achieved. The mixture is diluted with the "letdown" in the order indicated and stirred for half-hour.
Table 1 is a breakdown of the primer composition of formula "A", thus manufactured, in accordance with conventional alkyd paint characteristics:
2~1~779 TABLB
__ _ TOTAL NV VEHICLE PIGMENT ADDITIVES V~ATILES
__~no ¦~w~ L volum~ ¦ wo;gh~ vol~o ¦ woiqhl v~ hL _voll.uno ¦ woiQht ~sin(50%) 5307 52 a 2653 264 2653 26.4 Pi~nLsl3.62 50.l4 13.6250.14 Additivos 3.81 3.85 3.65 3.70 0.l6 0.l5 Volalilss ~9.5 25.43 29.5 25.42 TOT~L1~.00 132.2026.5326.40l3.6250.l4 3.653.70 56.l9 5197 C~4 5 b c d ~ r ~h _ ~ i Calculated Parameters of Formula "A"
Non-volatile LNV) by wt.:
(d + f + h) x 100 . 100 = (26.4 + 50.14 + 3.70) x 100 100 =80.24 Non-volatile (NV) by vol:
(c + e + g) x 100 . 100 = (26.53 + 13.62 + 3.65) x 100 . 100 =43.8%
Specific Gravity:
b . a = 132.2 . 100 = 1.322 Vehicle solids ~b.w.):
d(100) . d + j = 76.4(100) . 26.4 + 51.97 = 33.7 Vehicle solids (by vol):
c(100) (c + i) = 26.53 x 100 . (26.53 + 56.19) = 32~1%
Pioment volume concentration (PVC bY wt.) f(100) . (f + d + h) = (50.14 x 100) . 50.14 + 26.4 + 3.7 =62.5%
Piqment volume concentration (PVC by vol.) e(100) . (e + c + g) = (13.62 x 100) . 13.62 + 26.53 + 3.65 = 31.1%
To manufacture a primer composition of formula "B", the following ingredients:
2~15779 g Part I (grind) ~ VOL. SP. GR. WT.
(1) Heucophos XSP-H 1.4699 3.5005.1447 (2) Butral 22 2.1813 3.7008.070 (3) Yellow iron oxide (1150A) 3.4502 4.050 13.9733 (4) Magnesium silicate (C-400) 2.9595 2.800 8.2866 (5) Barium sulfate (Baryte #7) 1.2404 4.350 5.3897 (6) Titantum dioxide (401) 2.3301 4.000 9.3204 (6) Bentone SD-l 0.7011 1.4701.0306 (7) Duomeen TDO 0.3637 0.8500.3091 ln (8) Beckosol AA200 18.0359 1.00018.0359 (10) Xylene 20.1618 0.869 17.5206 (10) n-Butanol 3.4311 0.811 2.7826 Sub-total 56.3250 89.8703 Part II (Letdown~
(8) Beckosol 12006 22.3124 0.97021.6430 (12) CKU-2266 10.6497 0.~00 9.5847 (11) Exkin ~2 0.1645 0.940 0.1546 (10) Xylene 10.0810 0.869 8.7604 (11)Lead drier, 24~ naphtenate 0.3584 1.150 0.4122 (11)Cobalt drier, 6% naphtenate 0.1090 0.945 0.1030 Sub-total 43.6750 40.6597 TOTAL 100.0000 130.5300 Pigments and extenders are placed into the production vessel, equipped with cooling mantle, followed by Bentone SD-l (trade mark) gellant, xylene and Duomeen TDO (trade mark), dissolved in n-butanol. While agitating slowly until the blend is homogenous; the resin is added and the components are ground until the required fineness of grind (Hegman scale 6) is achieved. The mixture is diluted with the alkyd resin and solvent and while stirring the dispersion resin is added and the blend vigorously agitated for 3 hours. Finally the driers and antiskinning agent are mixed in.
Table 2 is a breakdown of the primer composition of formula "Bll, thus manufactured, in accordance with conventional alkyd paint characteristics:
= TO ~L NVVEI ~ICLE PIG~ Ir A~I1 IVES VOL~ ILES
. volums w~i~L volum~ w~ighl volum~ w~i~hl ~l~mo w~i~l ~lum3 w~i~l R~sin ~0~ - !8.05 IB.04 10.a3 12.56 7.22 6.27 Rosin -50% 22.32 21.64 11.16 12.83 1,1.16 9.69 10.65 9 ~ _5.33 5.32 5.33 4.63 Piqm~n~13.63 50.20 13.6350.19 Addiliv~s 1.67 2.00 . 1.67 2.00 Vo1~Liles 33 .68 29 .07 33 .67 29.06 r~J~ -I oo.oo 1~0.53 _27.31 30.71 13.6350.19 1.67 ? ~ 57.38 4965 ~K~_ ~ b c d ~ r q h i i Calculated Parameters of ~ormula "B":
Non-volatile (NV) by wt.:
(d + f + h) x lO0 . lO0 = (30.71 + 50.19 + 2.0) x 100 . 100 =82.9%
Non-volatile (NV) by vol.:
(c + e + g) x 100 . 100 = (27.31 + 13.63 + 1.67) x lO0 . 100 =42.6%
Specific Gravity:
b . a = 130.5 . 100 = 1.305 g/cc Vehicle solids (b.w.):
d(100) . d + j = 30.71 (100) . 30.71 + 49.65 = 38.2%
Vehicle solids (by vol.):
c(100) . (c + i) = 27.31 x 100 . (27.31 + 57.38) = 3~.2%
Piqment volume concentration (PVC by wt.):
f(lOO~ . (f + d + h) = (50.19 x 100) . 50.19 + 30.71 + 2.0 =60.5%
201~779 Pigment volume concentration (PVC by vol.):
e(100) . (e + c ~ g) = (13.63 x 100) - 13.63 + 27.31 + 1.67 = 32.0%
TE~TING OF THE FINAL FORMULATIONS
The two primer compositions of formula "A" and "B", 5 manufactured as previously indicated, were applied over diagonally scored steel and aluminium (6061) panels and tested for corrosion resistance in paint systems in a salt-spray chamber.
The paint systems used in the test included priming of the substrate with chromate wash-primer lGP-121* and with chromate-10 free wash-primer with a working code of "17A". The paint systems used in the corrosion test are presented in Tables 3 and 4. The corrosion test of the panels was set for 300 hrs.
TABI.B 3 (Al 6061 substrate panels, in triplicate) PAINT SYSTEMS NO. OF AVERAGE ~ PANEL
COATS DFT.(um) CODING
lGP-121* wash-primer 1 8-10 Test Primer "A" 1 35-45 ] Al/lA
lGP-61M* alkyd enamel 1 20-25 ]
~17AII chromate-free 1 8-10 wash-primer ]
Test primer "A" 1 35-45 ] Al/2A
lGP-61M8* alkyd enamel 1 20-25 ]
25 * = Trade Mark 201~779 PAINT SYSTBMS NO. OF AVERAGE ~E~ PANEL
COATS DFT.fum) CODING
lGP-121 wash-primer 1 8-10 ]
Test primer "B" 1 35-45 ] Al/lB
lGP-61M alkyd enamel 1 20-25 ]
"17A" chromate-free 1 8-10 ]
wash-primer ]
Test primer "B" 1 35-45 ] Al/2B
lGP~61M alkyd enamel 1 20-25 ]
(Steel substrats panels, in triplicate) PAINT SYSTEMS NO. OF AVERAGE ~E~ P~
COATS DFT.(~m) CODING
No wash-primer Test primer "A" 1 35-45 ] St/lA
lGP-61M alkyd enamel 1 20-25 ]
lGP-121 wash-primer 1 8-10 ]
Test primer "A" 1 35-45 ] St/2A
lGP-61M alkyd enamel 1 20-25 ]
''17AI' chromate-free 1 8-10 ]
wash-primer ]
Test primer "A" 1 35-45 ] St/2A
lGP-61M alkyd enamel 1 20-25 ]
No wash-primer Test primer "B" 1 35-45 ] St/lB
lGP-61M a.lkyd enamel 1 20-25 ]
lGP-121 wash-primer 1 8-10 ]
Test primer "B" 1 35-45 ] St/2B
lGP-61M alkyd enamel 1 20-25 ]
"17A" chromate-free 1 8-lo ]
wash-primer ]
Test primer "B" 1 35-45 ] St/3B
lGP-61M alkyd enamel 1 20-25 ]
Results of the salt spray test are presented in Table 5.
201~779 TAB~E 5 Results of salt spray test - 300 hrs Average corrosion rating on aluminium Sample Blistering Fail Surface Total Code From Rust Aver.
Score Al/lA 100 100 100 300 Al/2A 100 80 100 280 Al/lB 100 100 100 300 Al/2B 100 83 100 283 Average corrosion rating on steel St/lA 100 90 100 290 St/2A 100 90 100 290 St/3A 100 90 100 290 St/lB 100 90 100 290 St/2B 100 90 100 290 St/3B 100 90 100 290 The test of steel substrate did not reveal any difference between the systems with or without wash primers, and attained the high rating of "29" (maximum possible "30"). The same systems applied over 6061 aluminium were slightly less effective for chromate-free wash primer. Chromate-free test primers, "A" and "B" both had an equal rating of "28" on chromate-free wash primer, as opposed to "30" on chromate pigmented wash primer.
In using the composition according to the present invention, only a thir, wet, semi-transparent coat should be applied. The wet film thickness to achieve a recommended dry film thickness of 20 - 25 ~m should be approximately 46 to 57 ~m for 201~779 primer formula "A" and 47 to 59 ~m for primer formula "B". The coating has a spreading rate, at the recommended dry film thickness, of 0.051 L/m2, and a drying time at 25C of about 2 hours, to recoat.
Thus, it can be seen that primer compositions of formula "A" and formula "B" have superior anti-corrosion characteristics comparable to those of chromate wash-primers.
Thus it is apparent that there has been provided in accordance with the invention a primer base paint composition that fully satisfies the objective, aims and advantages set forth above.
While the invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications and variations as fall within the spirit and broad scope of the invention.
Claims (11)
1. An anti-corrosion primer base paint composition comprising:
(a) about 58% to 68% by volume (per total non-volatile) of a resin system selected from the group comprising a blend of phenolic modified alkyd/plasticizing alkyd and a blend of short and medium oil length non-modified alkyds and phenolic dispersion resins;
(b) about 8% to 12% by volume (per total non-volatile) anti-corrosion pigments selected from the group consisting of salts or borates and salts of phosphates, the weight ratio of salts of borates to salts of phosphate being between about 2:1 and 4:3; and (c) the balance of the ingredients, as required, being selected from the group comprising of one or more of inert extenders, inert coloring pigments, anti-settling agents, anti-skinning agents, anti-wetting agents, paint driers and solvent blend.
(a) about 58% to 68% by volume (per total non-volatile) of a resin system selected from the group comprising a blend of phenolic modified alkyd/plasticizing alkyd and a blend of short and medium oil length non-modified alkyds and phenolic dispersion resins;
(b) about 8% to 12% by volume (per total non-volatile) anti-corrosion pigments selected from the group consisting of salts or borates and salts of phosphates, the weight ratio of salts of borates to salts of phosphate being between about 2:1 and 4:3; and (c) the balance of the ingredients, as required, being selected from the group comprising of one or more of inert extenders, inert coloring pigments, anti-settling agents, anti-skinning agents, anti-wetting agents, paint driers and solvent blend.
2. A composition according to claim 1 wherein pigments are present in the following formulation in the following approximate concentrations by volume:
Anti-corrosion pigment 27 Yellow iron oxide 25 Magnesium silicate 22 Barium sulfate 9 Titanium dioxide 17
Anti-corrosion pigment 27 Yellow iron oxide 25 Magnesium silicate 22 Barium sulfate 9 Titanium dioxide 17
3. A composition according to claim 2 wherein the phosphate pigment is Heucophos XSP-H (trade mark) and the borate pigment is Butrol 22 (trade mark).
4. A composition according to claim 1 wherein the anti-corrosion pigments are present in the following formulation in the following approximate concentrations by volume:
Heucophos XSP-H* 10.68 Butrol 22* 16.02 Yellow Fe Oxide (1150) 25.34 Mg silicate (C-400) 21.74 Ba sulfate (Baryte #7) 9.11 Ti dioxide (2101) 17.11 100.00 * = Trade Mark
Heucophos XSP-H* 10.68 Butrol 22* 16.02 Yellow Fe Oxide (1150) 25.34 Mg silicate (C-400) 21.74 Ba sulfate (Baryte #7) 9.11 Ti dioxide (2101) 17.11 100.00 * = Trade Mark
5. A composition according to claim 1 wherein the pigments and resin system are present in the following approximate volume percentages:
Pigments 37.5 Binder 62.5
Pigments 37.5 Binder 62.5
6. A composition according to claim 1 having ingredients in the following approximate concentrations by weight:
Pigments 37.gl Beckosol 12079 * (50%) 39.94 Paraplex RG-10 * (100%) 1.79 Bentone SD-1 * 0.39 Lead drier (24%) 0.311 Cobalt drier (6%) 0.079 Xylene 17.13 n-Butanol 2.10 Duomeen TDO * 0.23 Exkin #2 * 0.12 * = trade mark
Pigments 37.gl Beckosol 12079 * (50%) 39.94 Paraplex RG-10 * (100%) 1.79 Bentone SD-1 * 0.39 Lead drier (24%) 0.311 Cobalt drier (6%) 0.079 Xylene 17.13 n-Butanol 2.10 Duomeen TDO * 0.23 Exkin #2 * 0.12 * = trade mark
7. A composition according to claim 1 having ingredients in the following approximate concentrations by weight:
Pigments 38.45 Beckosol 12006 * (50%) 16.58 Beckosol AA 200 * (60%) 13.82 CKU 2266 * 7.34 Bentone SD-1 * 0.79 Lead drier (24%) 0.316 Cobalt drier (6%) 0.079 Xylene 20.14 n-Butanol 2.13 Duomeen TD0 * 0.24 Exkin #2 * 0.12 * = trade mark
Pigments 38.45 Beckosol 12006 * (50%) 16.58 Beckosol AA 200 * (60%) 13.82 CKU 2266 * 7.34 Bentone SD-1 * 0.79 Lead drier (24%) 0.316 Cobalt drier (6%) 0.079 Xylene 20.14 n-Butanol 2.13 Duomeen TD0 * 0.24 Exkin #2 * 0.12 * = trade mark
8. A pigment mix for combining with alkyd resins to form a primer base paint composition, pigments being present in the following approximate concentrations by volume:
Anti-corrosion pigment 27 Yellow iron oxide 25 Magnesium silicate 22 Barium sulfate 9 Titanium dioxide 17
Anti-corrosion pigment 27 Yellow iron oxide 25 Magnesium silicate 22 Barium sulfate 9 Titanium dioxide 17
9. A pigment mix according to claim 8 wherein the anti-corrosion pigment is composed of 40% by volume phosphate pigment and 60% by volume borate pigment.
10. A pigment mix according to claim 9 wherein the phosphate pigment is Heucophos XSP-H (trade mark) and the borate pigment is Burtol 22 (trade mark).
11. A pigment mix according to claim 8 comprising the following ingredients in the following approximate concentrations by volume:
Heucophos XSP-H 11 Butrol 22 16 Yellow Fe Oxide (1150) 25 Mg silicate (C-400) 22 Ba sulfate (Baryte #7) 9 Ti dioxide (2101) 17
Heucophos XSP-H 11 Butrol 22 16 Yellow Fe Oxide (1150) 25 Mg silicate (C-400) 22 Ba sulfate (Baryte #7) 9 Ti dioxide (2101) 17
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2015779 CA2015779A1 (en) | 1990-04-30 | 1990-04-30 | Primer composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2015779 CA2015779A1 (en) | 1990-04-30 | 1990-04-30 | Primer composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2015779A1 true CA2015779A1 (en) | 1991-10-31 |
Family
ID=4144881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2015779 Abandoned CA2015779A1 (en) | 1990-04-30 | 1990-04-30 | Primer composition |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2015779A1 (en) |
-
1990
- 1990-04-30 CA CA 2015779 patent/CA2015779A1/en not_active Abandoned
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