Shell Oil Comapny

Minnesota Mining and Manufacturing Company

Michael K Martin

John D Moon

Carl Lesley Willis

Cheryl L Moore

George J Clements

Ray A Hunder

Stephen H Dwyer

Francis M Stark

William J Traynor

Michael F Conway

A method for binding a stack of fan folded sheets including manually disposing the stack of sheets with spine edges of the sheets generally aligned in a plane generally at a right angle to the side surfaces of the sheets in the stack; manually positioning a thick layer of pressure sensitive adhesive already adhered to a generally planar portion of a highly flexible backing having low resiliency over the spine edges; and manually pressing the side of the backing against the spine edge of the sheets to cause conformation of the backing and adhesion of the layer of pressure sensitive adhesive to the spine edges of the sheets, which is most easily done by manually pressing the spine edges of the sheets toward an edge of a structure such as a table or desk with the edge disposed transverse of the spine edges of the sheets along the surface of the backing opposite the layer of pressure sensitive adhesive while moving the spine edges longitudinally to bring the majority of the side of the backing opposite the layer of pressure sensitive adhesive progressively into engagement with the edge.

Manual sheet binding structure and method

A pressure-sensitive adhesive is provided. The adhesive comprises (a) about 50 to 95 weight percent of an ultraviolet radiation polymerized polymer of (i) one or more monomers which are predominantly alkyl acrylate, the alkyl groups of which have an average of 4 to 12 carbon atoms and (ii) about 0 to 15 weight percent of one or more strongly polar copolymerizable monomers or about 0 to 30 weight percent of one or more moderately polar copolymerizable monomers; and (b) about 5 to 50 weight percent of one or more tackifying resins. The tackifying resins are aromatic polymeric resins which have a number average molecular weight of about 300 to 2500, a polydispersity index of less than about 5, a glass transition temperature of about 40.degree. to 120.degree. C., and a solubility parameter of about 7 to 9.5 (cal/cc).sup.-1/2. The adhesive has a monomer conversion factor off at least 98%, and has good storage stability, i.e., losing no more than 70% of its adhesion when aged for a period of two weeks at 70.degree. C.

Pressure-sensitive adhesive

Elastomeric polymers comprising at least one alkali metal atom are modified by incorporating at least one group capable of sterically hindering coupling reactions which frequently occur when functional groups are subsequently incorporated into such polymers. In general, the group capable of sterically hindering coupling reactions may be incorporated by reacting the elastomeric polymer comprising at least one alkali metal atom with a compound containing a group capable of reacting with the elastomeric polymer at one end and at least one pendant group larger than hydrogen at the other. Groups that will react with elastomeric polymers comprising at least one alkali-metal atom are of course, well known, in the art, and include groups containing sulfur, oxygen, nitrogen and the like and ethylenically and acetylenically unsaturated groups. Compounds containing terminal ethylenically unsaturated groups are particularly useful in preparing the modified elastomeric polymers of this invention. Terminal groups capable of sterically hindering coupling reactions, generally, include all groups larger than hydrogen. Hydrocarbon groups are, however, particularly useful since these generally do not alter the properties which are characteristic of the elastomeric polymers. Aromatic groups containing at least 6 carbon atoms or cyclic hydrocarbon groups containing at least 5 carbon atoms are particularly effective. 1,1-diphenyl ethylene is particularly preferred in the present invention. Elastomeric polymers which have been modified in accordance with this invention may then be functionalized with less risk of undesirable coupling.

Block copolymer grafting process

A pressure-sensitive adhesive that has high cohesive strength and adheres permanently to high-solids automotive paint systems preferably comprises a mixture of (1) a crosslinked acrylic copolymer of acrylic acid ester and N-vinyl-2-pyrrolidone, and (2) certain tackifier resins. Useful tackifier resins are poly(isobornylmethacrylate), pentaerythritol ester of rosin, and mixed-aliphatic/aromatic polymeric tackifier resins such as a t-butylated styrene. The tackifier resin preferably has a T.sub.g of at least 30.degree. C., M.sub.n from 300 to 3000, and a solubility parameter from 8 to 9. The novel pressure-sensitive adhesive is particularly useful as a dense surface layer of a composite tape having a foamlike core.

Tackified acrylic pressure-sensitive adhesive and composite article

Lubricating oil additives having both dispersant and viscosity index-improving properties comprise a poly(polyalkenyl aromatic)nucleus, at least three hydrogenated conjugated diene homopolymer or copolymer arms linked to the nucleus, and at least one polymerized nitrogen containing polar compound arm linked to the nucleus.

Dispersant-VI improver product

Lubricating oil additives having both dispersant and viscosity index-improving properties are prepared by contacting a star-shaped polymer having a poly(polyalkenyl aromatic) nucleus, at least three conjugated diene homopolymer or copolymer arms linked to the nucleus, and at least one polymerized nitrogen containing polar compound arm linked to the nucleus, with a rectant selected from p-toluenesulfonylhydrazide and hydrazine under conditions wherein the reactants release H.sub.2 N.sub.2, which adds across the residual double bonds in the polymer therein hydrogenating the aliphatic unsaturation and releasing N.sub.2 gas.

Process for forming oil-soluble product

Lithium metal-terminated polymers of one or more alkadienes and of one or more monoalkenyl arenes are coupled by reaction with a coupling agent which has the general formula ##STR1## where X is hydrogen, halogen or an alkyl group and Y is halogen or an alkoxy group.

Growing community of inventors

Houston, TX, United States of America

Michael K Martin