US5147927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room-temperature, moisture-curable, primerless, polyurethane-based adhesive composition and method
Assignee: ADCO TECHNOLOGIES Inc
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Filing: 1991-03-29
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Granted: 1992-09-15
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Expires: 2011-03-29
Abstract
Abstract A primerless, one-component, moisture-curable polyurethane-based adhesive composition useful for affixing glass panels directly to electrocoat painted metal substrates comprises a polyurethane base polymer containing an electrocoat adhesion promoter. The sealant composition has fast cure times at ambient temperatures and forms a strong bond directly to electrocoat painted metal substrates without the need for a sealant primer.
Inventors
- 👤 Jamil Baghdachi
- 👤 Keith H. Mahoney
- 👤 Glenn E. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:11
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C09; C09J; C09J175/00; C09J175/04; C08L; C08L2666/00; C08L2666/28; C08L2666/44
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
181 words
A one-component, primerless, moisture-curable sealant composition for bonding glass directly to electrocoated metal substrates comprising a mixture of: (a) a silane-terminated polyurethane polymer of the formula ##STR9## wherein R is lower alkyl of from 1 to 6 carbon atoms; R 1 is a divalent bridging radical selected from the group consisting of divalent hydrocarbon radicals, divalent hydrocarbon ether radicals, and divalent hydrocarbon amino radicals; and A is --S-- or --NR 2 -- where R 2 is hydrogen or alkyl of from one to six carbon atoms; and (b) a substituted trimethoxy silane electrocoat adhesion promoter comprising a trimethoxy silane base of the formula: ##STR10## wherein R 3 , R 4 , and R 5 may be the same or different and are alkyl or alkoxyl of from one to four carbon atoms, and wherein B is at least one member selected from the group consisting of: ##STR11## wherein R 7 is alkyl of one to four carbon atoms or alkylene of one to four carbon atoms; and x, y, and z each independently represents an integer of from one to six.
Claim 2
Dependent Claim
181 words
A one-component, primerless, moisture-curable sealant composition for bonding glass directly to electrocoated metal substrates comprising a mixture of: (a) a silane-terminated polyurethane polymer of the formula ##STR9## wherein R is lower alkyl of from 1 to 6 carbon atoms; R 1 is a divalent bridging radical selected from the group consisting of divalent hydrocarbon radicals, divalent hydrocarbon ether radicals, and divalent hydrocarbon amino radicals; and A is --S-- or --NR 2 -- where R 2 is hydrogen or alkyl of from one to six carbon atoms; and (b) a substituted trimethoxy silane electrocoat adhesion promoter comprising a trimethoxy silane base of the formula: ##STR10## wherein R 3 , R 4 , and R 5 may be the same or different and are alkyl or alkoxyl of from one to four carbon atoms, and wherein B is at least one member selected from the group consisting of: ##STR11## wherein R 7 is alkyl of one to four carbon atoms or alkylene of one to four carbon atoms; and x, y, and z each independently represents an integer of from one to six.
Claim 3
Dependent Claim
54 words
A one-component, primerless, moisture-curable sealant composition as defined in claim 1 wherein said polyurethane polymer is the reaction product of a polyether polyol containing at least two hydroxyl groups per molecule and a number average molecular weight of about 1000 to about 3000 and an isocyanate having at least two isocyanate groups per molecule.
Claim 4
Dependent Claim
28 words
A one-component, primerless, moisture-curable sealant composition as defined in claim 1 wherein said polyurethane polymer has a number average molecular weight of from about 10,000 to about 30,000.
Claim 5
Dependent Claim
24 words
A one-component, primerless, moisture-curable sealant composition as defined in claim 3 wherein A is --NR 2 -- where R 2 is as defined therein.
Claim 6
Dependent Claim
41 words
A one-component, primerless, moisture-curable sealant composition as defined by claim 1 wherein said electrocoat adhesion promoter is present in an amount of between about 2.0 to about 10.0 parts by weight, based on 100 parts by weight of said polyurethane polymer.
Claim 7
Dependent Claim
41 words
A one-component, primerless, moisture-curable sealant composition as defined by claim 5 wherein said electrocoat adhesion promoter is present in an amount of between about 4.0 to about 8.0 parts by weight, based on 100 parts by weight of said polyurethane polymer.
Claim 8
Dependent Claim
34 words
A one-component, primerless, moisture-curable sealant composition as defined by claim 5 wherein said electrocoat adhesion promoter is selected from the group consisting of gamma-(glycidoxy)propyltrimethoxysilane, N-2-aminoethyl-N-3-aminoethyltrimethoxysilylpropyl-1,2-ethanediamine, and N-2-[4-vinyl-(benzeneamino)]ethyl-3-aminopropyltrimethoxysilane, including hydrohalide salts thereof and mixtures thereof.
Claim 9
Dependent Claim
36 words
A one-component, primerless, moisture-curable sealant composition as defined in claim 1 further containing from about 1.0 to about 10.0 parts by weight of a flexibilizing agent, based on 100 parts by weight of said polyurethane polymer.
Claim 10
Dependent Claim
40 words
A one-component, primerless, moisture-curable sealant composition as defined in claim 5 wherein said flexibilizing agent is present in an amount of from about 2.0 to about 5.0 parts by weight, based on 100 parts by weight of said polyurethane polymer.
Claim 11
Dependent Claim
43 words
A one-component, primerless, moisture-curable sealant composition as defined in claim 9 wherein said flexibilizing agent is selected from the group consisting of dioctyl phthalate, dibutyl phthalate, diundecyl phthalate, dioctyl adipate, butyl benzyl phthalate, iso-decyldiphenyl phosphate, di-iso-decyl phthalate, N-butyl-p-toluene-sulfonamide and N-ethyl-p-toluene-sulfonamide and mixtures thereof.
Claim 12
Dependent Claim
19 words
A one-component, primerless, moisture-curable sealant composition as defined in claim 1 wherein said electrocoat adhesion promoter is N-2-[4-vinyl(benzeneamino)]ethyl-3-aminopropyltrimethoxysilane, monohydrochloride.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |