Process for preparing adhesive-repellent coatings

Details Process for preparing adhesive-repellent coatings Process for preparing adhesive-repellent coatings

1984-02-09

1984-09-25

Page, Thurman K.

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273897, 4273898, 427391, 427393, 4273935, 4273936, 528 15, 528 31, 528 32, B05D 302, C08G 7706

Patent

active

044736037

ABSTRACT:
Coatings which have a predetermined degree of adhesive-repellency are prepared by applying to surfaces which are to be rendered adhesive-repellent an organopolysiloxane having Si-bonded hydrogen and an aliphatic multiple bond in the same molecule and a catalyst which promotes the addition of Si-bonded hydrogen to an aliphatic multiple bond, and thereafter crosslinking the organopolysiloxane by the addition of Si-bonded hydrogen to an aliphatic multiple bond. The organopolysiloxane having both an aliphatic multiple bond and Si-bonded hydrogen in the same molecule, has a viscosity of at least 300 mPa.s at 25.degree. C. The adhesive-repellency of the coated substrate is at least partially dependent on the ratio of Si-bonded hydrogen to the aliphatic multiple bond, i.e., the higher the ratio of Si-bonded hydrogen to the aliphatic multiple bond, the lower the adhesive-repellency.
Organic compounds containing at least one grouping of the formula ##STR1## in an amount to retard or prevent the addition of Si-bonded hydrogen to an aliphatic multiple bond at room temperature, are to be excluded from the adhesive-repellent compositions of this invention.

REFERENCES:
patent: 3220972 (1965-11-01), Lamoreaux
patent: 3445420 (1969-05-01), Kookootsedes et al.
patent: 3882083 (1975-05-01), Berger et al.
patent: 4260726 (1981-04-01), Deubzer et al.
patent: 4347346 (1982-08-01), Eckberg
patent: 4421783 (1983-12-01), Marwitz et al.

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