Transparent liquid absorbent materials for use as ink-receptive layers
AssigneeMinnesota Mining and Manufacturing Company
InventorMohammad Iqbal
Life of this patent
Estimating the term…
Abstract
A transparent recording sheet suitable for ink-jet printers' comprising a transparent support bearing on at least one major surface thereof a light transmissive ink-receptive layer containing a hydrophilic polymer crosslinked by polyfunctional aziridine. The recording sheet remains transparent even after ink is absorbed and provides a fast drying, durable, non-tacky transparency suitable for use with an overhead projector.
Claims9
A recording sheet comprising a transparent support bearing on at least one major surface thereof a transparent ink-receptive layer comprising:
- (1) from about 92 to about 99.5% by weight of a water-soluble copolymer;
- and
- (2) from about 0.5 to about 8% by weight of a polyfunctional aziridine crosslinking agent;
- said water-soluble copolymer having been crosslinked after being coated onto said support.
A recording sheet comprising a transparent support bearing on at least one major surface thereof a transparent ink-receptive layer comprising:
- (1) from about 92 to about 99.5% by weight of a water-soluble copolymer;
- and
- (2) from about 0.5 to about 8% by weight of a polyfunctional aziridine crosslinking agent said water-soluble copolymer having been crosslinked after being coated onto said support, said water-soluble copolymer comprising:
- (a) from about 0.5 to about 20% by weight of at least one ethylenically unsaturated monomer having acidic groups, up to 100% of said acidic groups being present as an ammonium salt or a salt prepared from a volatile amine;
- (b) from about 10 to about 99.5% by weight of at least one monomer selected from the group consisting of polar compounds containing nitrogen groups;
- and
- (c) up to about 70% by weight of a hydrophilic, ethylenically unsaturated alkylester.
Dependencies are inferred from the claim text.