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Wednesday, May 28, 2008

Methylene chloride-free paint stripper

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This formulation are effective for the removal of latex acrylic enamel, nitrocellulose lacquer, vinyl acrylic interior, polyurethane varnish and a modified tall oil epoxy.


General Purpose Stripper (Formula C)

ComponentsWt %
INVISTA DBE-2
35
Dimethylsulfoxide (DMSO) 28
Dipropylene glycol methyl ether (DPM) 25
Ethyl-3-ethoxypropionate (EEP) 5
Water 1
Thickener 1
Surfactant 5

Removal of alkyd exterior enamel, marine paints and marine varnish is fair. Military specified aircraft coating of polyurethane over epoxy primer is resistant to attack and may require multiple applications of stripper or use of activators. The suggested formulations should be used as starting points and may need to be customized for specific applications.

Surfactants that can be used are linear alkyl phenol ethoxylates, sodium
alkylnaphthalenesulfonates, and ethoxylated alcohols. Effective thickeners suggested for DBE-containing formulations include Dow Methocel® or Ethocel® 200 and Aqualon Klucel® PR. Inorganic thickeners, such as bentonite or fumed silica, may also be used.

Source: Invicta
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