The Mead Corporation

Rong-Chang Liang

Jing-Den Chen

Jesse Hipps, Sr

Kerry Kovacs

Karl A Kintz

William A Hammann, Iv

Margaret T Thomas

Emerson K Colyer

Paul C Adair

Joseph G O'Connor

Teresa M Thomas

David A Hutchings

Alexander R Pokora

William L Cyrus, Jr

Katherine A Gyure

William H Simpson

Kelli J Borello

Chih-Her Suen

M Teresa Thomas

Carolyn Greene

Charles G Ruffner, Jr

Kenneth P Carpenter

Elizabeth A Reno

A process for forming microcapsules having discrete capsule walls comprising the steps of:

Method for producing amine-formaldehyde microcapsules and photosensitive

A process for emulsion polymerization to form a latex having a particle size greater than about 0.5 micrometers by charging to a reaction vessel under agitation a reaction mixture including water, emulsifiers at an initial concentration slightly greater than or equal to the critical micelle concentration, a protective colloid, ethylenically unsaturated monomers, and an ionically balanced combination of an anionic and a cationic water soluble free radical initiator or a nonionic initiator; reacting the mixture to form an emulsion of polymerized monomer; and adding additional monomer, emulsifier, and protective colloid and a water soluble chain transfer agent to the reactor while continuing to agitate the mixture under conditions such that the emulsifier concentration does not exceed that at which new polymeric nuclei are formed.

Emulsion polymerization with large particle size

A photoresist composition, and a process for using the same are; the composition comprises a polyphenolic resin and a sensitizer effective, when exposed to actinic radiation, to provide alkali solubility to said composition, wherein said resin is represented by the formula (I) or (II): ##STR1## wherein R is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkaryl group or an aryl group; R' is a silyl group; and n and n'+m are greater than 3. The composition exhibits high thermal and plasmal resistance and good dissolution characteristics.

Photoresist composition including polyphenol and sensitizer

A method for preparing microcapsules which comprises:

Method for preparing microcapsules having improved pre-walls, and

A process for preparing microcapsules which comprises dispersing a hydrophobic oily liquid in a continuous aqueous phase, the hydrophobic oily liquid containing a pre-wall former and at least one chain extender, the chain extender being a polyhydric compound which is capable of reacting with the pre-wall former at a rate such that the chain extender does not substantially react with the pre-wall former prior to dispersing the hydrophobic oily liquid in the continuous aqueous phase; and forming capsule walls around the droplets of hydrophobic oily liquid in the continuous aqueous phase.

Method of making microcapsules having an improved pre-wall

The present invention is directed to a method for preparing microcapsules which comprises:

Methods for the production of microcapsules using functionalized

Method for polymerizing a monomer suspended in water which comprises: Preparing a polymerization mixture of a water immiscible, liquid, ethylenically unsaturated monomer, a polyisocyanate and an oil soluble free radical initiator, dispersing said mixture in a solution of water and a surfactant, and effecting polymerization of said monomer.

Microsuspension polymerization

A developer sheet comprising a support having a layer of a color developer on the surface thereof, said color developer being capable of reacting with a substantially colorless electron donating color former to produce a color image and being an acrylic or methacrylic polymer having pendant developer moieties (e.g., hydroxy aromatic or aromatic acid moieties such as salicylic or phthalic acid moieties) which are preferably metallated (e.g., zincated) or being the polymeric reaction product of vinyl salicylic acid or salt.

Vinyl developer resins

A process for producing microcapsules comprising the steps of: adding a hydroxy or amine functionalized acrylic resin or copolymer to an aqueous emulsion including a dispersed internal phase composition;

Method for producing microcapsules and photosensitive microcapsules

A method for forming microcapsules by enwrapping an oily core material in a formaldehyde condensation product formed in situ wherein a dispersant is used of the formula (I): ##STR1## where: M is an alkali metal cation or a quaternary ammonium group,

Sulfonated-ethylene oxide dispersants for use in preparing

A recording sheet which comprises a substrate having a large of a metal on the surface thereof, and a layer of microcapsules, said layer of microcapsules including a coupling agent to improve the adhesion of said microcapsule layer to said metal layer; the coupling agent is preferably a silane.

Microcapsule coating compositions containing coupling agents for

A developer composition having improved resistance to vinyl blocking comprising a finely divided thermoplastic phenolic resin and a finely divided thermoplastic vinylic or acrylic resin;

Developer composition having improved blocking resistance

A recording sheet which comprises a substrate having a layer of a metal on the surface thereof and a layer of microcapsules, said microcapsules being bonded to one another by means of a crosslinking agent which has reactively interacted with reactive moieties on the surface of said microcapsules, to improve the adhesion of said microcapsule layer to said metal layer.

Recording sheet having improved cohesion and adhesion of microcapsules

A developer sheet comprising a support having a layer of a color developer on the surface thereof, said color developer being capable of reacting with a substantially colorless electron donating color former to produce a color image and being an acrylic or methacrylic polymer having pendant developer moieties (e.g., hydroxy aromatic or aromatic acid moieties such as salicyclic or phthalic acid moieties) which are preferably metallated (e.g., zincated) or being the polymeric reaction product of vinyl salicylic acid or salt.

A developer composition comprising first and second developer materials, said first developer material being a finely divided thermoplastic phenolic resin and said second developer material being a finely divided thermoplastic vinylic or acrylic resin containing pendant developer moieties, said first and second developer materials being sufficiently compatible that upon heating they coalesce to form a non-tackey, and scratch resistant film.

Growing community of inventors

Centerville, OH, United States of America

Rong-Chang Liang