US5356994A
Expired / Lapsed
US
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Adhesive/sealant composition comprising a rubber component
Assignee: Bostik Inc
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Filing: 1992-07-07
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Granted: 1994-10-18
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Expires: 2012-07-07
Abstract
Abstract A hot-vulcanizable, pumpable rubber-based adhesive/sealant where the rubber component is a mixture of butadiene solid rubber and butadiene or isoprene liquid rubber, and wherein the liquid rubber comprises carboxylic acid groups. The adhesive/sealant compositions of the invention are particularly useful for bonding metal sheeting in the construction of automobile shells.
Inventors
- 👤 Markus Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:34
CPC Classifications
C; C09; C09J; C09J109/00; C09J113/00; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/08
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
39 words
A hot-vulcanisable adhesive/sealant composition comprising a rubber component and a vulcanisation system, the rubber component comprising a mixture of a butadiene solid rubber and a butadiene or isoprene liquid rubber, and wherein the liquid rubber comprises carboxylic acid groups.
Claim 2
Dependent Claim
39 words
A hot-vulcanisable adhesive/sealant composition comprising a rubber component and a vulcanisation system, the rubber component comprising a mixture of a butadiene solid rubber and a butadiene or isoprene liquid rubber, and wherein the liquid rubber comprises carboxylic acid groups.
Claim 3
Dependent Claim
19 words
The composition of claim 1 where the carboxylic acid groups in the liquid rubber are in the anhydride form.
Claim 4
Dependent Claim
22 words
The composition of claim 1 where that the liquid rubber has a molecular weight M n of from about 1,000 to 10,000.
Claim 5
Dependent Claim
14 words
The composition of claim 1 where the liquid rubber is a butadiene liquid rubber.
Claim 6
Dependent Claim
14 words
The composition of claim 4 where the butadiene liquid rubber contains maleic anhydride groups.
Claim 7
Dependent Claim
31 words
The composition of claim 1 where the liquid rubber has greater than about 70 mole percent cis-1,4 double bonds, based on the total amount of double bonds of the liquid rubber.
Claim 8
Dependent Claim
21 words
The composition of claim 6 where the liquid rubber has not more than about two mole percent of vinyl double bonds.
Claim 9
Dependent Claim
18 words
The composition of claim 1 where each liquid rubber molecule contains from 1 to 3 carboxylic anhydride groups.
Claim 10
Dependent Claim
18 words
The composition of claim 1 where the liquid rubber molecule contains from 2 to 6 carboxylic acid groups.
Claim 11
Dependent Claim
26 words
The composition of claim 1 where the liquid rubber is present in an amount of from about 10 to 20 percent by weight of the mixture.
Claim 12
Dependent Claim
22 words
The composition of claim 1 where the butadiene solid rubber has a molecular weight M n of from about 50,000 to 500,000.
Claim 13
Dependent Claim
16 words
The composition of claim 1 further comprising a liquid rubber essentially free of carboxylic acid groups.
Claim 14
Dependent Claim
33 words
The composition of claim 1 where the vulcanisation system is selected from the group consisting of (1) a system comprising sulphur and a vulcanisation accelerator, and (2) a system comprising a free-radical initiator.
Claim 15
Dependent Claim
54 words
A process for bonding metal sheeting, comprising applying a hot-vulcanisable adhesive/sealant composition to a first sheet substrate, the adhesive/sealant composition comprising a rubber component and a vulcanisation system, the rubber component comprising a mixture of a butadiene solid rubber and a butadiene or isoprene liquid rubber wherein the liquid rubber comprises carboxylic acid groups.
Claim 16
Dependent Claim
54 words
A process for bonding metal sheeting, comprising applying a hot-vulcanisable adhesive/sealant composition to a first sheet substrate, the adhesive/sealant composition comprising a rubber component and a vulcanisation system, the rubber component comprising a mixture of a butadiene solid rubber and a butadiene or isoprene liquid rubber wherein the liquid rubber comprises carboxylic acid groups.
Claim 17
Dependent Claim
25 words
The process of claim 14 where the adhesive/sealant composition is applied to the first sheet substrate by pumping the adhesive/sealant composition at an elevated temperature.
Claim 18
Dependent Claim
21 words
The process of claim 14 further comprising applying a second sheet substrate over the adhesive/sealant composition on the first sheet substrate.
Claim 19
Dependent Claim
24 words
The process of claim 16 where the first and second sheet substrates are metal sheeting suitable for use in the construction of automobile shells.
Claim 20
Dependent Claim
14 words
The process of claim 14 further comprising curing the adhesive/sealant composition by hot vulcanisation.
Claim 21
Dependent Claim
21 words
The process of claim 18 wherein the vulcanisation is conducted at a baking temperature of from about 150° to 180° C.
Claim 22
Dependent Claim
21 words
The composition of claim 1 where the carboxylic acid groups of the liquid rubber are randomly distributed over the polymer molecule.
Claim 23
Dependent Claim
18 words
The composition of claim 1 where the composition consists essentially of the rubber component and a vulcanisation system.
Claim 24
Dependent Claim
26 words
The process of claim 14 consisting essentially of applying the composition to the first sheet substrate and then applying a second sheet substrate over the composition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |