Water soluble norbornene-type polymers and photoimageable compositions thereof
AssigneesPromerus, LLC, Sumitomo Bakelite Co., Ltd.
InventorsLarry F. Rhodes, Hugh Burgoon, Steven J. Smith, Kazuyoshi Fujita
Life of this patent
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Abstract
Embodiments in accordance with the present invention encompass water soluble polycyclic vinyl addition polymers having a norbornene type repeat unit derived from a norbornene type of monomer that encompasses a saccharide functional moiety. Embodiments in accordance with the present invention also encompass low and high molecular weight polymers with low catalyst loading.
Claims18
A method for making a water soluble vinyl addition norbornene-type polymer comprising:
- charging a reaction vessel with a first type of norbornene-type monomer represented by Formula A1:
- where m is 0 or 1, at least one of R1, R2, R3, and R4 is a saccharide functional moiety selected from monosaccharide, disaccharide, trisaccharide, oligosaccharide or a polysaccharide, and the remaining R1, R2, R3, and R4 are hydrogen;
- further charging the reaction vessel with water, a catalyst, formic acid as a chain transfer activating agent, and an optional co-catalyst where the monomer to catalyst ratio is at least 500/1;
- providing agitation to the reaction vessel contents to promote dissolution of the first type of norbornene-type monomer, catalyst, chain transfer activating agent and optional co-catalyst in the solvent;
- and
- providing heat and continued agitation to the contents for 18 to 120 hours to facilitate polymerization of the first type of norbornene-type monomer to obtain a polymer having a weight average molecular weight (Mw) of at least 18,000.
A water soluble vinyl addition norbornene-type polymer comprising a first type of norbornene-type repeating unit represented by Formula B1 which is derived from a monomer of formula A1:
- where m is 0 or 1, at least one of R1, R2, R3, and R4 is a saccharide functional moiety selected from monosaccharide, disaccharide, trisaccharide, oligosaccharide or a polysaccharide, and the remainingR1, R2, R3, and R4 are hydrogen;
- and
- said polymer has a weight average molecular weight (Mw) of at least 18,000.
An aqueous based crosslinkable composition comprising:
- a water soluble vinyl addition norbornene-type polymer comprising a first type of norbornene-type repeating unit represented by Formula B1 which is derived from a monomer of formula A1:
- where m is 0 or 1, at least one of R1, R2, R3, and R4 is a saccharide functional moiety selected from monosaccharide, disaccharide, trisaccharide, oligosaccharide or a polysaccharide, and the remaining R1, R2, R3, and R4 are hydrogen;
- and said polymer has a weight average molecular weight (Mw) of at least 18,000;
- a casting solvent;
- and
- a crosslinking agent.
Dependencies are inferred from the claim text.