US 2019/0375909 A1 · FOAMED ADHESIVE, MORE PARTICULARLY PRESSURE-SENSITIVE ADHESIVE, PROCESS FOR THE PRODUCTION AND ALSO THE USE THEREOF

Abstract

Process for producing a pressure-sensitive adhesive comprising expanded microballoons, wherein the constituents for forming the adhesive are mixed in a first mixing assembly, the mixed adhesive is transferred into a second mixing assembly into which, at the same time, unexpanded microballoons are fed, the microballoons are expanded in the second mixing assembly or on exit from the second mixing assembly, the adhesive mixture with the expanded microballoons is shaped to a layer in a shaping assembly in which expanded microballoons which have broken through the surface are pressed into the layer surface and the layer of adhesive mixture together with the expanded microballoons are optionally applied to a weblike backing material.

Claims22

Dependent claims

Pressure-sensitive adhesive comprising an adhesive base and a plurality of expanded microballoons, wherein:

the pressure-sensitive adhesive has a bond strength;
the bond strength is reduced by not more than 30% compared to a bond strength of a comparable pressure-sensitive adhesive in which voids formed by a plurality of expanded microballoons are destroyed but which is otherwise identical to the pressure-sensitive adhesive;
the pressure-sensitive adhesive has a surface roughness of less than or equal to 10 μm;
and
the adhesive base comprises randomly copolymerized styrene-butadiene rubber, a styrene block copolymers, or a compound comprising randomly copolymerized styrene-butadiene rubber and a styrene block copolymers.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/527,936Filed 31 Jul 2019

Priority

DE 10 2008 004 388.514 Jan 2008

Published

12 Dec 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification59 codes

C08J 9/32
Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof: from compositions containing…
B29B 7/426
With screw or helix: with consecutive casings or screws, e.g. for charging, discharging, mixing
B29B 7/485
With intermeshing devices, e.g. screws: with three or more shafts provided with screws
B29B 7/487
With intermeshing devices, e.g. screws: with consecutive casings or screws, e.g. for feeding, discharging, mixing

Family

Application12/031,300Division · filed 14 Feb 2008

Application14/954,289Continuation · filed 30 Nov 2015

Application16/527,936Continuation

Application14/954,289Division

US 2009/0181250 A1Published application

US 2016/0083549 A1Published application

US 2019/0375909 A1This patent

From the US filing history. Foreign family members aren’t listed.

Foamed adhesive, more particularly pressure-sensitive adhesive, process for the production and also the use thereof

Life of this patent

Foamed adhesive, more particularly pressure-sensitive adhesive, process for the production and also the use thereof

Life of this patent

Abstract

Claims22