Minnesota Mining and Manufacturing Company

3m Innovative Properties Company

Timothy D Bredahl

Daniel C Munson

David James Yarusso

Richard E Bennett

Anthony R Plepys

Robert L Smith

Harold W Leverty

Patrick Darby Hyde

Gregg A Patnode

Felix P Lau

Robert D Hamann

Sheila F Cox

John L Ethen

Gary R Miron

Dennis L Christ

Donald R Peacock

George E Cox

Timothy J Walker

Michael A Giefer

David C Jones

John Michael Oberthier

Herbert W Goetsch

James Hc Harper

The invention is directed toward a hot melt adhesive composition and processes for producing the same. The hot melt adhesive composition comprises: at least one non-thermoplastic hydrocarbon elastomer; at least one thermoplastic additive, wherein a ratio of melt viscosity of the at least one thermoplastic additive to melt viscosity of the at least one non-thermoplastic hydrocarbon elastomer is less than about 1:20 when measured at a shear rate of 100 seconds at a particular hot melt processing temperature; and at least one modifier.

Thermoplastic additives for hot melt adhesives based on non-thermoplastic hydrocarbon elastomers

A method for producing a pressure sensitive adhesive composition includes at least one elastomer that produces a substantially homogeneous pressure sensitive adhesive composition. The method is particularly well suited for relatively high throughput continuous compounding rates, e.g., at a throughput rate of more than about 5.4 kg/hr/l free volume of the continuous compounding device utilized in the

Process for preparing pressure sensitive adhesives

An elongate mass of material wrapped by a liner in which the liner is wrapped around the material with the liner inside surface facing the peripheral surface of the material, with first and second regions of the liner extending away from the material with the liner inside surface of the first region in unbonded contact with the liner inside surface of the second region so as to enclose the material with said liner. The material and the center region of the liner together form a core of the wrapped mass of material, and the first and second liner regions together form a tab of the wrapped mass of material. The wrapped mass of material includes a first portion and a second portion and is arranged such that the core of a second portion applies sufficient force to the tab of a first portion so as to maintain the mass of material enveloped by the liner at the first portion. Also presented are methods and apparatus for wrapping and unwrapping such material. A preferred embodiment of the invention provides a cold-flowable material such as a hot-melt pressure sensitive adhesive wrapped in a liner such that the liner is easily removed from the material.

Wrapped material, and method and apparatus for wrapping and unwrapping

A solvent-free hot melt process, for preparing a non-thermosettable, pressure-sensitive adhesive from a tackified non-thermoplastic hydrocarbon elastomer. The process employs a continuous compounding device that has a sequence of alternating conveying and processing zones. The processing zones masticate and mix materials in them. Non-thermoplastic elastomers having high molecular weight may be readily compounded into adhesives in the process.

Solventless compounding and coating of non-thermoplastic hydrocarbon

The invention provides an adhesive composition suitable for use in an insulating tape having improved plasticizer resistance, comprising from about 13 to about 42 of a polyisoprene homopolymer, from about 13 to about 42 of a styrene-isoprene-styrene copolymer, from about 25 to about 55 of an aliphatic tackifying agent containing from about 4 to about 6 carbon atoms, and from about 2 to about 20 of an end block reinforcing resin.

Adhesive compositions with improved plasticizer resistance

Pavement-marking sheet material having protuberances on its upper surface which carry partially exposed microspheres by which the protuberances are made retroreflective and which are separated by recessed areas in which microspheres are fully embedded and not exposed, so as to improve the daytime appearance of the sheet material.

Embossed pavement-marking sheet material

Removable pavement-marking sheet material incorporates a stretchable porous fibrous web, such as a nonwoven web of randomly distributed fibers, preferably embedded in a pressure-sensitive adhesive layer carried on a backing. The fibrous web comprises closely spaced durable weather-resistant fibers and exhibits good tear strength in any direction. The complete sheet material exhibits a high tensile strength and a low residual force after stretching, i.e., a low force tending to retract the sheet material back to its prestretched dimensions.

Removable pavement-marking sheet material

Growing community of inventors

Cottage Grove, MN, United States of America

Timothy D Bredahl