Patent EP0819749A2 successfully refreshed from Google Patents.
EP0819749A2
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EP
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Adhesive composition
Assignee: Bostik BV
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Filing: 1997-07-08
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Granted: —
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Expires: 2017-07-08
Abstract
Abstract An adhesive or sealant composition suitable for a variety of industrial applications, as a motor vehicle windscreen adhesive, or particularly, because of its extremely high resistivity, as an adhesive or sealant for electrical equipment, comprises a cross-linkable polymer and a cross-linking catalyst for the polymer and is characterised in that the polymer is a moisture cross-linkable polymer, suitably a silyl-modified polyether or polyester, and in that the composition comprises a water-scavanger capable of preventing or delaying the cross-linking of the polymer, an adhesion promoter and a rheology controller. Other materials such as fillers or pigments may also be present. To isolate the composition from ambient moisture which might overcome the effect of the water scavanger and cause premature cross-linking the composition is preferably contained for storage in a water-impermeable container.
Inventors
- 👤 Petrus Johannes Cornelius Vosters
- 👤 Cornelis Jacob Keyser
- 👤 Cornelis Adrianus Sanders
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:46
CPC Classifications
C; C09; C09J; C09J201/00; C09J201/02; C09J201/10; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/336; C09J171/00; C09J171/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
An adhesive or sealant composition suitable for a
variety of industrial applications or as a motor vehicle
windscreen adhesive, the composition comprising a cross-linkable
polymer and a cross-linking catalyst for the polymer and being
characterised in that the polymer is a moisture cross-linkable
polymer, and in that the composition comprises a water-scavanger
capable of preventing or delaying the cross-linking of the
polymer, an adhesion promoter and a rheology controller.
Claim 2
Dependent Claim
63 words
A composition as claimed in claim 1 or 2 wherein the
cross-linkable polymer is a silyl-modified polyether or acrylic-polyether
polymer, a silyl-modified polyether-urethane or
acrylic-polyether-urethane polymer, a silyl-modified polyester
polymer or a silyl-modified polyester-urethane polymer or a
mixture of a silyl-modified polyether or acrylic-polyether
polymer or a silyl-modified polyether-urethane or acrylic-polyether-urethane
polymer with a silyl modified polyester
polymer or a silyl-modified polyester-urethane polymer.
Claim 3
Dependent Claim
29 words
A composition as claimed in claim 2 wherein the cross-linkable
polymer is a polyoxyalkylene polymer having silyl groups
capable of reacting to give silicone cross-linking between the
polyoxyalkylene chains.
Claim 4
Dependent Claim
15 words
A composition as claimed in any preceding claim
wherein the catalyst is an organometallic catalyst.
Claim 5
Dependent Claim
17 words
A composition as claimed in any preceding claim
wherein the moisture scavanger is an alkoxy- or oximino-silane.
Claim 6
Dependent Claim
22 words
A composition as claimed in any preceding claim wherein
the adhesion promoter is an amino-, mercapto- or epoxy-alkoxy
silane or a siloxane.
Claim 7
Dependent Claim
13 words
A composition as claimed in any preceding claim
comprising a heat-activatable rheology controller.
Claim 8
Dependent Claim
15 words
A composition as claimed in claim 7 wherein the
rheology controller is a polyamide wax.
Claim 9
Dependent Claim
26 words
A composition as claimed in claim 8 wherein the
polyamide wax is heat activatable to give a storage modulus of at
least 200 kN/m 2 .
Claim 10
Dependent Claim
11 words
A composition as claimed in any preceding claim
comprising pigment particles.
Claim 11
Dependent Claim
12 words
A composition as claimed in claim 1 and substantially
as described herein.
Claim 12
Dependent Claim
13 words
A high electrical resistivity adhesive or sealant as
claimed in any preceding claim.
Claim 13
Dependent Claim
75 words
A process for the production of an adhesive or sealant
composition suitable for a variety of industrial applications or
as a motor vehicle windscreen adhesive by mixing a cross-linkable
polymer and a cross-linking catalyst for the polymer the process
being characterised in that the polymer is a moisture cross-linkable
polymer, and in that the composition comprises a water-scavanger
capable of preventing or delaying the cross-linking of
the polymer an adhesion promoter and a rheology controller.
Claim 14
Dependent Claim
35 words
A process as claimed in claim 13 wherein the rheology
controller is heat-activatable and the composition is heated to
bring the storage modulus to at least 200 kN/m 2 and to encourage
the moisture-scavanging reactions.
Claim 15
Dependent Claim
38 words
A process as claimed in claim 14 wherein the
composition is heated to control the storage modulus and is then
cooled before being enclosed in a moisture-impermeable container
or is enclosed in the said container and then heated.
Claim 16
Dependent Claim
23 words
A process as claimed in claim 13 for the production of
a
composition as claimed in any one of claims 1 to 12.
Claim 17
Dependent Claim
21 words
The use of a composition as claimed in any one of
claims 1 to 11
as a motor vehicle windscreen adhesive.
Claim 18
Dependent Claim
21 words
The use of a composition as claimed in claim 12 in the
mounting of electrical components or of components connected
thereto.
References Cited (Backward Citations)
No citation records indexed.
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