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US 4,451,550 AGranted
Vesicular film and composition with phenoxy resin matrix
AssigneeJames River Graphics, Inc.
InventorsEverett W. Bennett, Ahmad Arfaei
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AssigneeJames River Graphics, Inc.
InventorsEverett W. Bennett, Ahmad Arfaei
Estimating the term…
Novel, coatable, highly long-chain branched, ungelled, most preferably endblocked, non-linear phenoxy resins of random structure devoid of regularly recurring units, with the average distance between the branch sites thereof being essentially of the same order of magnitude as the average branch length, such resins advantageously comprising the copolymerization product of: (i) at least one dihydric phenol, e.g., sulfonyl diphenol; (ii) an epoxy comonomer having two epoxy functional groups, e.g., resorcinol diglycidyl ether; (iii) a branching agent comprising an epoxy or phenolic compound having a functionality greater than 2, and preferably at least 3, wherein the amount of branching agent is sufficient to provide at least 10 mole percent branch sites in the polymer resin, and, most preferably; (iv) a monofunctional phenol or epoxide as an endblocker compound. The branched phenoxy resins are well adapted as matrices for enhanced film speed vesicular films.
In a vesicular film element comprising a film support and a coating therefor including a matrix resin and an imaging amount of a photosensitive vesiculating agent adapted to generate gas vescicles upon exposure to radiation and subsequent heat-actuated development, the improvement which comprises, as the matrix resin for the photosensitive vesiculating agent, a coatable, highly branched, ungelled, monofunctional comonomer endblocked, non-linear phenoxy resin of random structure devoid of regularly recurring units, with the average distance between the branch sites thereof being essentially of the same order of magnitude as the average branch length.
In a vesicular film element comprising a film support and a coating therefor including a matrix resin and an imaging amount of a photosensitive vesiculating agent adapted to generate gas vesicles upon exposure to radiation and subsequent heat-activated development, the improvement which comprises, as the matrix resin for the photosensitive vesiculating agent, a coatable, ungelled, non-linear phenoxy resin of random structure being highly long-chain branched with a monomeric tri- or tetrafunctional compound, said branched phenoxy resin being devoid of regularly recurring units and having the average distance between the branch sites of essentially the same order of magnitude as the average branch length.
A vesicular image forming element comprising
A composition of matter comprising a phenoxy matrix resin and an imaging amount of a photosensitive vesiculating agent adapted to generate gas vesicles upon exposure to radiation and subsequent heat-actuated development, wherein the phenoxy resin comprises the non-linear, ungelled, highly long-chain branched reaction product of
Dependencies are inferred from the claim text.