US4693772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot applied, expandable sealer
Assignee: Parker Americas Inc
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Filing: 1986-12-22
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Granted: 1987-09-15
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Expires: 2006-12-22
Abstract
Abstract A hot applicable, heat expandable, thermosetting sealing composition particularly adapted for use in the automotive industry is disclosed. Such a sealant comprises a styrene-butadiene rubber mixed with conventional thermoplastic resin blowing agents, vulcanizing agent, oils and thickening agents wherein the addition of an activator selected from the family of sulfonamide materials results in a sealer which can be hot applied without causing it to prematurely blow or cross-link yet remain affixed to the component until such time as it is desired to blow and cure the sealant.
Inventors
- 👤 William A. Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:41
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/0061; C09; C09K; C09K3/00; C09K3/10; C08J2309/00; C08J2309/06; C09K2200/00; C09K2200/02; C09K2200/0239; C09K2200/04; C09K2200/0447; C09K2200/06; C09K2200/0607; C09K2200/0615; Y; Y10; Y10S; Y10S521/00; Y10S521/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
223 words
A method of producing a thermosetting seal between two or more surfaces comprising pumping a heated selant comprising: about 10 percent to about 25 percent by weight of styrene-butadiene rubber, about 5 percent to about 20 percent by weight of a thermosplastic resin, about 0.5 percent to about 3 percent by weight of an accelerator activator, to about 0.2 percent by weight to about 0.75 percent by weight of a vulcanizing agent, about 25 percent by weight to about 35 percent by weight of a plasticizer, about 20 percent by weight to about 60 percent by weight of filler, about 0.5 percent by weight to about 2 percent by weight of a blowing agent, about 1 percent to about 10 percent by weight of a thickening agent about 4 percent to about 40 percent by weight of an oil or plasticizer, said composition having a sulfonamide accelerator present at concentrations of about 0.5 percent to about 3.0 percent by weight, onto at least one surface of at least one component; cooling the heated sealant to cause it to substantially crystallize; contacting the first component with a second component thereby causing the sealant to be positioned between the two components; heating the entire assembly to cure and expand the sealant causing the space between the two surface to be filled by the expanding sealant.
Claim 2
Independent Claim
223 words
A method of producing a thermosetting seal between two or more surfaces comprising pumping a heated selant comprising: about 10 percent to about 25 percent by weight of styrene-butadiene rubber, about 5 percent to about 20 percent by weight of a thermosplastic resin, about 0.5 percent to about 3 percent by weight of an accelerator activator, to about 0.2 percent by weight to about 0.75 percent by weight of a vulcanizing agent, about 25 percent by weight to about 35 percent by weight of a plasticizer, about 20 percent by weight to about 60 percent by weight of filler, about 0.5 percent by weight to about 2 percent by weight of a blowing agent, about 1 percent to about 10 percent by weight of a thickening agent about 4 percent to about 40 percent by weight of an oil or plasticizer, said composition having a sulfonamide accelerator present at concentrations of about 0.5 percent to about 3.0 percent by weight, onto at least one surface of at least one component; cooling the heated sealant to cause it to substantially crystallize; contacting the first component with a second component thereby causing the sealant to be positioned between the two components; heating the entire assembly to cure and expand the sealant causing the space between the two surface to be filled by the expanding sealant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |