W. R. Grace Co.-conn.

Macdermid, Incorporated

Macdermid Acumen, Inc.

John Scott Hallock

Donald E Herr

Drew V Speer

Cynthia Louise Ebner

Srinivas K Mirle

Tariq Quadir

Alan R Browne

Alan Frederick Becknell

Hiroshi Samukawa

Daniel J Hart

Betsy Elzufon

Alan F Becknell

Daniel Joseph Hart

An oxygen scavenging composition capable of providing good oxygen absorption capabilities wherein the oxygen scavenging agent is a hydroxosulfitometalate. Methods for making a hydroxosulfitometalate are also disclosed.

Oxygen scavenging compositions and methods for making same

Disclosed are waterborne, stable photoresist compositions and methods of their preparation and use. The compositions are characterized by increased shear and storage stability. The photoresist composition comprises an aqueous emulsion of a 22% or less neutralized carboxylated resin and non-ionic surfactant containing poly(ethylene-oxide) segments, photopolymerizable monomer and photoinitiator. Neutralization is accomplished using either an organic or an inorganic base or mixtures thereof. The photoresist compositions are useful to selectively coat and protect surfaces subjected to corrosive environments, e.g., etchant processes, in the production of circuit traces for electronic circuit boards.

Stable, ionomeric photoresist emulsion and process of preparation and

An oxygen scavenging agent and compositions capable of providing good oxygen absorption capabilities which contain said agent, wherein the agent is a modified anionic hydrotalcite particulate material.

Oxygen scavenging hydrotalcite and compositions containing same

A substantially ester-free, acid-functional thiol-functional resin is prepared via the reaction of an epoxy compound with a thiolacetic acid in the presence of an amine catalyst and heat to form a thioacetate derivative which is hydrolyzed to yield an ester-free, .beta.-hydroxy thiol-functional resin. The .beta.-hydroxy thiol-functional resin can then be reacted with a material capable of insert a group conferring aqueous-base developability such as a cyclic anhydride.

Photoresist developable in aqueous base made from acid-functional

Acid functional primary thiols having no hydroxy substituents in the beta position, and also having aromatic backbones, can be combined with unsaturated resins to make aqueous base-developable, photoimaging compositions such as solder masks and resists.

Photocurable composition based on acid functional primary resinous

Highly versatile stable photoresist emulsions can be prepared using low levels of neutralization while minimizing the use of surfactants and associative thickeners. High solids, low viscosity waterborne photoresist emulsion compositions are prepared by mixing and comminuting a partially neutralized acid functional latex polymer resin with photopolymerizable monomers and photoinitiators under conditions sufficient to produce a stable emulsion.

Waterborne photoresist emulsions and methods of preparation thereof

A coating of resin and photoactive functionality is autodeposited from an emulsion onto a metallic substrate in order to selectively protect the substrate from corrosive environments such as etchant processes. An acid and oxidizing agent are included in the emulsion so that when the substrate is immersed in the emulsion the resin and photoactive functionality autodeposits. The resulting coating can be exposed to actinic radiation in an image-wise fashion and developed in an alkaline solution to develop the image created. In instances where the emulsion and process are used to make circuit boards, the metallic surface uncovered during developing is then etched away, leaving only the coated sections of the surface. The resulting coated surfaces will be the circuit traces of the circuit board.

Autodeposition emulsion and methods of using thereof to selectively

Dense sintered parts of ceramic and/or metallic materials are formed using stereo photolithography. An initial flowable mixture of sinterable inorganic particles, photocurable monomer, photoinitiator and dispersant is flowed over a substrate and cured in a selective pattern. Subsequent layers of the mixture are flowed over the substrate and cured to build a three dimensional body. The body is then fired to produce a dense sintered part. Parts having in excess of 95% of theoretical density can be produced.

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Ellicott City, MD, United States of America

John Scott Hallock