Impregnation of porous articles

Details Impregnation of porous articles Impregnation of porous articles

1977-04-26

1979-04-03

Lusignan, Michael R.

Coating processes

Vacuum utilized prior to or during coating

Metal base

427388R, 10628724, 526298, 134 38, 252DIG1, 252DIG8, 427340, 427350, 4285395, B08B 700, C23D 1700, B05D 300

Patent

active

041478215

ABSTRACT:
This invention relates to the impregnation of rigid porous articles, particularly metal castings. In its preferred form the impregnant is a liquid mixture of monofunctional (meth)acrylic ester and a relatively small proportion of polyfunctional (meth)acrylic ester to provide a cross linked product on curing and to facilitate washing of the casting with water and an emulsifier. A peroxy or other free radical catalyst such as AZBN is associated in the impregnant with an inhibitor such as a hydroquinone derivative so that curing can be effected at a temperature of 90.degree. C. within 3 to 15 minutes. Curing is preferably effected by immersion in a hot water bath.

REFERENCES:
patent: 3940362 (1976-02-01), Overhults
patent: 3969552 (1976-07-01), Malofsky et al.

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