Method of touching up surface-blemished matt-finished surface gr

Details Method of touching up surface-blemished matt-finished surface gr Method of touching up surface-blemished matt-finished surface gr

1983-11-23

1985-10-01

Lusignan, Michael R.

Coating processes

Restoring or repairing

264 36, 264340, 264341, 427161, B05D 500, B32B 3500, B29H 506, B29H 516

Patent

active

045445788

ABSTRACT:
Surface finish blemishes in "color coded" surface grained parts injection molded from colored plastic can be removed by spraying the blemished surface area of the part with a sprayable mixture comprised of (a) a substantially non-yellowing, solvent-soluble generally transparent, binder resin in the amount of about 2-10%, (b) a finely divided flatting pigment which is generally transparent when suspended in said resin, the amount of said pigment being about 0.4-1%, and (c) about 90-95% of a volatile solvent medium effective to dissolve said resin without destroying the surface grain of the part when sprayed thereon, thereby to cover the blemished area with at least one coating of a transparent, matt-surfaced solid film of flatting pigment dispersed in said resin which coating blends substantially completely uniformly with the original matt finish of said part. Where the part is molded of a plastic which is solvent-resistant such as polyethylene or polypropylene, a chlorinated polyolefin resin is added in the amount of about 0.2-2% and sufficient to promote adhesion to said surface, such polyolefin resin being compatible with said binder resin and soluble in said solvent medium at least prior to evaporation of the latter.

REFERENCES:
patent: 3485662 (1969-12-01), Metevia
patent: 4247580 (1981-01-01), Chao
patent: 4332861 (1982-06-01), Franz et al.

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