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US 6,225,368 B1Granted
Water based grafting
AssigneeNational Power PLC
InventorsVincent F. D'Agostino, John Michael Newton
Life of this patent
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Abstract
A monomer-grafted cross-linked polymer is prepared by the steps of activating a polymer by radiation, quenching the activated polymer so as to effect cross-linking therein, activating the cross-linked polymer by irradiation and contacting the activated cross-linked polymer with an emulsion that includes an unsaturated monomer, an emulsifier and water. The activated cross-linked polymer is contacted with the emulsion for a sufficient time to effect a desired extent of grafting.
Claims29
A process for the preparation of a monomer-grafted cross-linked polymer comprising the steps of:
- (i) activating the polymer by irradiation,
- (ii) quenching the activated polymer so as to effect cross-linking therein,
- (iii)activating the cross-linked polymer by irradiation,
- (iv) contacting the activated cross-linked polymer with an emulsion which comprises
- (a) an unsaturated monomer,
- (b) an emulsifier, and
- (c) water,
- for a time sufficient to effect the desired extent of grafting.
5 more elements
Dependencies are inferred from the claim text.