C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/139, 400/743
C08G 18/38 (2006.01) B32B 27/08 (2006.01) C08G 18/10 (2006.01) C08G 18/12 (2006.01) C08G 18/32 (2006.01)
Patent
CA 1129584
C-2,809 D-1,570 MOISTURE CURING POLYURETHANE TOPCOAT PAINT WITH IMPROVED GLOSS STABILITY Abstract of the Disclosure In a preferred embodiment, an improved moisture curing urethane resin that is durable in the presence of moisture and sunlight is formed by reacting an excess of a suitable aliphatic isocyanate with a suitable mixture of organic triols and diols and a hindered piperidine type stabilizer, e.g., bis(2,2,6,6 tetramethyl piperidinyl-4) sebacate in the presence of an organotin urethane forming catalyst such as dibutyltin dilaurate. This resin mixture product may be formulated with pigments, solvents and the like to form a topcoat paint that, upon application to a substrate, is curable under conditions of high relative humidity but relatively low temperatures (e.g., about 90°C.). The cured paint has excellent gloss stability due to the chemical incorporation of the stabilizer segments throughout the binder resin molecules.
294529
General Motors Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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