US 2017/0282494 A1 · FOAMABLE HOT MELT GASKET SEALANTS AND USE THEREOF

Abstract

The invention relates to a one-part, foamable hot melt gasket sealant. The foamable hot melt adhesive comprises greater than about 35 wt % of a rubber block copolymer, a tackifier and less than about 5 wt % of a wax. The foamable hot melt adhesive can be applied onto a space in between two mating surfaces without expensive foam-in-place equipment. The foamable hot melt gasket sealant is particularly suitable in automotive applications, electrical component and technical lighting sectors.

Claims20

Dependent claims

A foamable hot melt adhesive composition comprising:

(a) at least about 35 wt % a rubber block copolymer having a solution viscosity of about 10 cps to about 1,950 cps measured in 25 wt % toluene solution at 25° C.;
and
(b) a tackifier;
wherein the adhesive has (i) a viscosity of about 10,000 cps to about 100,000 cps at 180° C.,
wherein the foamed adhesive has (ii) a compression of about 5% to about 90% measured in accordance with DIN ISO 815 and (iii) a Shore 00 Durometer set hardness of about 10 to about 60 measured in accordance ASTM D2240;
and
wherein the total wt % of the component equal to 100 wt % of the adhesive.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/625,577Filed 16 Jun 2017

Priority

18 Dec 2014

Published

5 Oct 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification33 codes

C09J 7/10
Adhesives in the form of films or foils: without carriers
B32B 5/18
Layered products characterised by the non- homogeneity or physical structure , i.e. comprising a fibrous, filamentary, particulate or foam…
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
B32B 15/046
Comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material: of foam

Foamable hot melt gasket sealants and use thereof

Life of this patent

Foamable hot melt gasket sealants and use thereof

Life of this patent

Abstract

Claims20