Rinsewater separable and recyclable heat curing impregnation compositions
AssigneeHenkel Loctite Corporation
InventorsFrederick F. Newberth, III, Charles M. Muisener, Stephen W. Ernst
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Abstract
The present invention relates to heat curing impregnation sealant compositions, which are readily separable from water upon mixing.
Claims8
A free-radical heat curable composition, which upon mixing with water is separable therefrom, comprising:
- (a) a (meth)acrylate component comprising one or more (meth)acrylates which together have a density greater than that of water;
- and
- (b) a free radical heat-curing initiator, wherein the composition has a density greater than that of water, thereby self-separating therefrom when mixed without emulsification.
A free-radical heat curable composition, which upon mixing with water is separable therefrom, comprising:
- (a) a (meth)acrylate component comprising one or more (meth)acrylates which together have a density less than that of water;
- and
- (b) a free radical heat-curing initiator, wherein the composition has a density less than that of water, thereby self-separating therefrom when mixed without emulsification.
A method of separating uncured impregnation sealant compositions from water-based impregnation rinsewater, comprising the steps of:
- (a) providing a porous article whose pores have been impregnably sealed by a curable composition which upon mixing with water is separable therefrom, said composition comprising;
- (i) a (meth)acrylate component comprising one or more (meth)acrylates which together have a density greater than that of water;
- and
- (ii) a free radical heat-curing initiator, wherein the composition has a density sufficiently different from that of water, thereby allowing for facile separation therefrom when mixed;
- (b) water washing said article in a rinsewater tank;
- and
- (c) allowing the composition to self-separate and sink to the bottom of the rinsewater without emulsification.
A method of separating uncured impregnation sealant compositions from water-based impregnation rinsewater, comprising the steps of:
- (a) providing a porous article whose pores have been impregnably sealed by a curable composition which upon mixing with water is separable therefrom, said composition comprising;
- (i) a (meth)acrylate component comprising one or more (meth)acrylates which together have a density less than that of water;
- and
- (ii) a free radical heat-curing initiator, wherein the composition has a density sufficiently different from that of water, thereby allowing for facile separation therefrom when mixed;
- (b) water washing said article in a rinsewater tank;
- and
- (c) allowing the composition to self-separate and float to the surface of the rinsewater without emulsification.
Dependencies are inferred from the claim text.