Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1988-02-18
1989-07-04
Swisher, Nancy A. B.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428331, 428402, 428913, 4289133, G02B 3124, B05D 506, B44F 104
Patent
active
048449768
ABSTRACT:
Retroreflective sheeting has been improved by a coating comprising silica and a transparent polymer selected from aliphatic polyurethanes, polyvinyl chloride copolymers having a minor amount of a comonomer containing at least one carboxylic acid or hydroxyl moiety, and acrylic polymers. Silica comprises 10-80 weight percent (10-70% in the case of polyacrylates) of the transparent protective coating. For example, a solution or dispersion of polyurethane is mixed with a silica sol and possibly other ingredients (e.g. wetting agent, UV light absorber and adhesion promoter), and the composition is coated onto the retroreflective sheet and dried. The coated retroreflective sheeting has superior soil and dew repellancy, retaining a higher percentage of original brightness after exposure to dirt and/or dew conditions.
REFERENCES:
patent: 2326634 (1943-08-01), Gebhard et al.
patent: 2366516 (1945-01-01), Geffeken et al.
patent: 2407680 (1946-09-01), Palmquist et al.
patent: 3224899 (1965-12-01), Wilson
patent: 3700478 (1972-10-01), Bingham
patent: 3706589 (1972-12-01), Fukuda et al.
patent: 3914469 (1975-10-01), Delano et al.
patent: 3940359 (1976-02-01), Chambers
patent: 4025159 (1977-05-01), McGrath
patent: 4085245 (1978-04-01), De Vito et al.
patent: 4177315 (1979-12-01), Ubersax
patent: 4211823 (1980-07-01), Suzuki et al.
patent: 4311763 (1982-01-01), Conroy
patent: 4367920 (1983-01-01), Tung et al.
patent: 4390373 (1983-06-01), White et al.
patent: 4564556 (1986-01-01), Lange
patent: 4664966 (1987-05-01), Bailey et al.
EPO, 0 142, 250, 5/85, Princoe et al.
Kirn Walter N.
Little Douglas B.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Swisher Nancy A. B.
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