EP0405341A1
Expired / Lapsed
EP
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Masking composition and method
Assignee: Henkel Corp
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Filing: 1990-06-22
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Granted: —
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Expires: 2010-06-22
Abstract
Abstract A masking composition for use in paint spray booths which comprises an aqueous solution or dispersion of a cellulose gum, a plasticizer and preferably a surfactant. The composition is applied to the surfaces and related paint spray booth equipment to mask them from paint overspray during the painting operation. The maskant forms a water soluble film which can easily be removed by washing with water subsequent to the painting operation.
Inventors
- 👤 Christine Wilk
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 01:46
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/32; B05D1/322; B05D1/327; C; C09; C09D; C09D101/00; C09D101/08; C09D101/26; C09D101/28; C09D101/286; C09D5/00; C09D5/008
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
51 words
A maskant composition comprising an aqueous solution or dispersion of (1) at least about 1% by weight based on the total maskant composition of a carboxymethyl cellulose gum; (2) at least about 5% by weight of a plasticizer; and when present (3) at least about 0.025% by weight of a surfactant
Claim 2
Dependent Claim
51 words
A maskant composition comprising an aqueous solution or dispersion of (1) at least about 1% by weight based on the total maskant composition of a carboxymethyl cellulose gum; (2) at least about 5% by weight of a plasticizer; and when present (3) at least about 0.025% by weight of a surfactant
Claim 3
Dependent Claim
74 words
A maskant composition as defined in claim 1 wherein said carboxymethyl cellulose gum is sodium carboxymethyl cellulose having a DS of about 0.4 to about 1.5 and an average molecular weight of about 90,000 to about 700,000 and said plasticizer is selected from the group consisting of: (a) glycerin (b) propylene glycol (c) a polyethylene glycol having an average molecular weight of about 200 to about 6,000 and mixtures of (a) (b) and (c).
Claim 4
Dependent Claim
37 words
A maskant composition as defined in claim 2 wherein said carboxymethyl cellulose has a degree of substitution of about 0.7 to about 1.2 and is employed in an amount of about 1% to about 5% by weight.
Claim 5
Dependent Claim
25 words
A maskant composition as defined in claim 3 wherein said carboxymethyl cellulose is employed in an amount of about 1.5 to about 4% by weight.
Claim 6
Dependent Claim
48 words
A maskant composition as defined in claim 2 wherein said plasticizer is a mixture of glycerin, propylene glycol and a polyethylene glycol having a molecular weight in the range about 200 to about 1,000 and is employed in an amount of about 5% to about 15% by weight.
Claim 7
Dependent Claim
25 words
A maskant compostion as defined in claim 4 in which said mixture is present in an amount of about 5% to about 12% by weight.
Claim 8
Dependent Claim
49 words
A maskant composition as defined in claim 5 wherein said glycerin is present at about 55 to abut 75% by weight of said plasticizer mixture, said propylene glycol is present at about 15 to about 30% by weight and said polyethylene glycol is present at about 10-20% by weight.
Claim 9
Dependent Claim
34 words
A maskant composition as defined in claim 3 wherein said surfactant is present in an amount effective to reduce the surface tension of said aqueous maskant composition to about 30 to about 36 dynes/cm.
Claim 10
Dependent Claim
15 words
A maskant composition as defined in claim 7 wherein said surfactant is an acetylenic glycol.
Claim 11
Dependent Claim
15 words
A maskant composition as defined in claim 8 wherein said acetylenic glycol is 2,4,7,9-tetramethyl-5- decyn-4,7-diol.
Claim 12
Dependent Claim
33 words
A maskant composition as defined in claim 9 wherein said acetylenic glycol is present in an amount by weight of about 0.025 to about 0.1% based on the total weight of maskant composition.
Claim 13
Dependent Claim
14 words
A maskant composition as defined in claim 1 and further comprising a fluorescent dye.
Claim 14
Dependent Claim
16 words
A maskant compositin as defined in claim 11 wherein said fluoresent dye is a stilbene derivative.
Claim 15
Dependent Claim
16 words
A maskant composition as defined in claim 12 wherein said fluorescent dye is 1,1′-(1,2-ethenediyl) bis [benzene].
Claim 16
Dependent Claim
13 words
A maskant composition as defined in claim 1 and further comprising a pigment.
Claim 17
Dependent Claim
14 words
A maskant composition as defined in claim 14 wherein said pigment is titanium dioxide.
Claim 18
Dependent Claim
47 words
A maskant compositin having the following composition by weight based on the total maskant composition. Ingredients % Water 87.5 Carboxymethyl cellulose gum 2.75 Fluorescent dye 0.05 Plasticizer: (a) Glycerin 3.0 (b) Propylene glycol 1.5 (c) Polyethylene glycol 1.0 Triethanolamine 3.0 Corrosion Inhibitor 1.0 Preservative 0.1 Surfactant 0.1
Claim 19
Dependent Claim
47 words
A maskant compositin having the following composition by weight based on the total maskant composition. Ingredients % Water 87.5 Carboxymethyl cellulose gum 2.75 Fluorescent dye 0.05 Plasticizer: (a) Glycerin 3.0 (b) Propylene glycol 1.5 (c) Polyethylene glycol 1.0 Triethanolamine 3.0 Corrosion Inhibitor 1.0 Preservative 0.1 Surfactant 0.1
Claim 20
Dependent Claim
43 words
A maskant composition having the following composition by weight based on the total maskant composition. Ingredient % Water 86.58 Carboxymethyl cellulose gum 3.25 Fluorescent dye 0.05 Glycerin 3.50 Propylene glycol 1.00 Polyethylene glycol 1.00 Triethanolamine 3.00 Corrosion Inhibitor 1.00 Preservative 0.10 Surfactant 0.10
Claim 21
Dependent Claim
43 words
A maskant composition having the following composition by weight based on the total maskant composition. Ingredient % Water 86.58 Carboxymethyl cellulose gum 3.25 Fluorescent dye 0.05 Glycerin 3.50 Propylene glycol 1.00 Polyethylene glycol 1.00 Triethanolamine 3.00 Corrosion Inhibitor 1.00 Preservative 0.10 Surfactant 0.10
Claim 22
Dependent Claim
42 words
A maskant composition having the following composition by weight based on the total maskant compsition. Ingredient % Water 68.05 Carboxymethyl cellulose gum 2.75 Pigment 13.50 Glycerin 7.50 Propylene glycol 2.00 Polyethylene glycol 1.50 Triethanolamine 3.00 Corrosion Inhibitor 1.00 Preservative 0.10 Surfactant 0.10
Claim 23
Dependent Claim
42 words
A maskant composition having the following composition by weight based on the total maskant compsition. Ingredient % Water 68.05 Carboxymethyl cellulose gum 2.75 Pigment 13.50 Glycerin 7.50 Propylene glycol 2.00 Polyethylene glycol 1.50 Triethanolamine 3.00 Corrosion Inhibitor 1.00 Preservative 0.10 Surfactant 0.10
Claim 24
Dependent Claim
38 words
A maskant composition having the following composition by weight based on the total maskant composition. Ingredient % Water 85.65 Carboxymethyl cellulose gum 1.75 Glycerin 6.00 Propylene glycol 1.50 Polyethylene glycol 1.00 Triethanolamine 3.00 Corrosion Inhibitor 1.00 Preservative 0.10
Claim 25
Dependent Claim
38 words
A maskant composition having the following composition by weight based on the total maskant composition. Ingredient % Water 85.65 Carboxymethyl cellulose gum 1.75 Glycerin 6.00 Propylene glycol 1.50 Polyethylene glycol 1.00 Triethanolamine 3.00 Corrosion Inhibitor 1.00 Preservative 0.10
Claim 26
Dependent Claim
93 words
A method of maintaining paint spray booths against build up of overspray paint while painting surfaces within said spray booth comprising (a) applying to the surfaces of said paint spray booth and painting equipment associated therewith, the maskant composition of claim 1 to form a film on, and mask, said surfaces and equipment from paint being applied thereto, and (b) subsequent to painting an article in said paint spray booth washing said film from said masked surfaces and equipment with water, so as to remove said maskant composition from said surfaces and equipment.
References Cited (Backward Citations)
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