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Water-based transparent image recording sheet for plain paper copiers
| Details |
Inventors: Ali, Mahfuza B.; Dodge, Bill H.; Hughes, William H.; Iqbal, Mohammed; Lu, Ying-Yuh; McMan, Steven J.; Sarkar, Manisha; Tseng, Chi-Ming;
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Primary Examiner: Ryan; Patrick J.
Assistant Examiner: Krynski; William A.
Attorney, Agent or Firm: Griswold; Gary L., Kirn; Walter N., Neaveill; Darla P.
An image recording sheet and a transparent water-based toner receptive coating therefore comprising an imaging copolymer formed from at least one monomer selected from the group consisting of bicyclic alkyl (meth) acrylates, aliphatic alkyl (meth)acrylates having from about one to about 12 carbon atoms, aromatic (meth)acrylates, and a polar monomer having the formula: ##STR1## wherein R is hydrogen or methyl, R.sub.1 and R2 may be hydrogen, identical or differing alkyl groups having up to about 8 carbon atoms, preferably up to about 2 carbon atoms, or the quaternary cationic salts thereof, at least one novel long chain polymeric particle having good antifriction characteristics and optionally, an antistatic agent selected from the group consisting of cationic agents, anionic agents, fluorinated agents, and nonionic agents. |
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DETAILED DESCRIPTION OF THE INVENTION The imaging copolymer contains from about 80 parts to about 99 parts of at least one monomer selected from the group consisting of bicyclic alkyl (meth)acrylates, aliphatic alkyl (meth)acrylates having from about one to about twelve carbon atoms, and aromatic (meth)acrylates.
Copolymers containing at least one bicyclic alkyl (meth)acrylate are preferred for use with most commercial copiers, as they improve the adhesion of toner to the image receptive coating.
Useful bicyclic (meth)acrylates include, but are not limited to, dicyclopentenyl (meth)acrylate, norbornyl (meth)acrylate, 5-norborene-2-methanol, and isobornyl (meth)acrylate.
Preferred bicyclic monomers include dicyclopententyl (meth)acrylate, and isobornyl (meth)acrylate.
Useful aliphatic alkyl (meth)acrylates include, but are not limited to, methyl acrylate, ethyl acrylate, methyl (meth)acrylate, isobutyl (meth)acrylate, isodecyl (meth)acrylate, cyclohexyl (meth)acrylate, and the like.
Preferred aliphatic monomers include methyl (meth)acrylate, ethyl (meth)acrylate, and isodecyl (meth)acrylate.
For imaging polymers to be emulsion polymerized, the bicyclic alkyl (meth)acrylates preferably comprise from about 10 parts to about 80 parts, more preferably from 20 parts to about 60 parts.
For solution polymers, the preferred minimum amount is lower, i.
e.
, about 5 parts, more preferably about 10 parts.
Most copiers have a styrene based toner system; the addition of styrene and substituted styrene monomers yield imaging sheets having very good toner adhesion with such machines.
The copolymer must also contain from about 1 to about 20 parts of a polar monomer having the formula: ##STR4## wherein R is hydrogen or methyl, R.
sub.
1 and R.
sub.
2 is selected from the group consisting of hydrogen, identical, and differing alkyl groups having up to about 8 carbon atoms, preferably up to about 2 carbon atoms; the N-group can also comprise a cationic salt thereof.
Useful examples include N,N-dialkyl monoalkyl amino ethyl (meth)acrylate, and N,N-dialkyl monoalkyl amino methyl (meth)acrylate, N-butyl amino ethyl (meth)acrylate, and the like for emulsion polymers, and quaternary ammonium salts thereof for solution polymers
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Adhesives and Rubbers 
