Claims
- 1. A method for the preparation of substrates having improved water resistance which comprises
- (a) applying to such substrate a formulation containing a binding amount of a natural or synthetic binder and a filler at least a portion of which is an amount of plastic particles, said formulation further containing encapsulated in capsules a solvent to which the plastic particles are sensitive;
- (b) drying the formed coating, said plastic particles being in an essentially non-coalesced state at time of application and non-film forming under the conditions of application and drying of the coating; and
- (c) rupturing said capsules following application of said formulation, thereby wetting the formed coating from step (a) with said solvent;
- the amount of plastic particles and sensitivity being sufficient to form a film thereof on exposure to said solvent, thereby materially increasing water and/or solvent resistance.
Parent Case Info
This is a division of application Ser. No. 827,127, filed Aug. 24, 1977, now abandoned.
US Referenced Citations (30)
Divisions (1)
|
Number |
Date |
Country |
Parent |
827127 |
Aug 1977 |
|