Process for waterproofing starch binders

Details Process for waterproofing starch binders Process for waterproofing starch binders

1988-02-11

1989-10-10

Lusignan, Michael

Stock material or miscellaneous articles

Composite

Of carbohydrate

4283215, 4284022, 4273934, B32B 326, B32B 516, B32B 2304

Patent

active

048731471

ABSTRACT:
This invention relates to a process for applying waterproof starch layers to substrates, which comprises applying an aqueous starch dispersion containing a waterproofing agent to the substrate and then drying same.
In order to improve the processability and processing time of the binders, this invention is characterized in that the waterproofing agent or a catalyst which catalyzes the reaction of the waterproofing agent with the starch molecules is present in the starch dispersion in the form of microcapsules, and that, after applying the starch dispersion to the substrate, the waterproofing agent is reacted with the starch molecules by digesting disrupting or puncturing the microcapsules.

REFERENCES:
patent: 4199619 (1980-04-01), Oda et al.
patent: 4734395 (1988-03-01), Ogata et al.
patent: 4745097 (1988-05-01), Mackawa et al.

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