Patent US4309334A successfully refreshed from Google Patents.
US4309334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally-resistant glass-filled adhesive/sealant compositions
Assignee: Henkel Loctite Corp
•
Filing: 1977-08-29
•
Granted: 1982-01-05
•
Expires: 1997-08-29
Abstract
Abstract A glass filler comprising a mixture of glass microballoons, glass beads and, optionally, milled glass fibers, preferably in approximate equal proportion by weight, imparts greatly improved thermal cycling resistance to adhesives, such as acrylate-based, ultraviolet curing adhesives.
Inventors
- 👤 Robert A. Valitsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:11
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/40; C09; C09J; C09J4/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
148 words
A curable adhesive and sealant composition comprising: (a) one or more free radical curable monomers or oligomers; (b) an initiator of free radical polymerization; (c) a thixotropic agent in sufficient quantity to produce a sufficiently high viscosity to maintain the glass filler mixture in suspension at least for the period of time required for the composition to gel; and (d) about 5-25% by weight of the total composition of a glass filler mixture consisting essentially of, by weight based on the total glass filler mixture: (1) about 5 to about 50% glass microballoons; (2) about 10 to about 50% solid glass beads; (3) 0 to about 50% milled glass fibers; and (4) 0 to about 40% glass powder or glass flakes; said composition being curable through gaps of at least 5 mils and, when cured, forming a bond or seal which is resistant to destruction by thermal cycling.
Claim 2
Dependent Claim
148 words
A curable adhesive and sealant composition comprising: (a) one or more free radical curable monomers or oligomers; (b) an initiator of free radical polymerization; (c) a thixotropic agent in sufficient quantity to produce a sufficiently high viscosity to maintain the glass filler mixture in suspension at least for the period of time required for the composition to gel; and (d) about 5-25% by weight of the total composition of a glass filler mixture consisting essentially of, by weight based on the total glass filler mixture: (1) about 5 to about 50% glass microballoons; (2) about 10 to about 50% solid glass beads; (3) 0 to about 50% milled glass fibers; and (4) 0 to about 40% glass powder or glass flakes; said composition being curable through gaps of at least 5 mils and, when cured, forming a bond or seal which is resistant to destruction by thermal cycling.
Claim 3
Dependent Claim
16 words
A composition of claim 1 containing in addition at least one accelerator of free radical polymerization.
Claim 4
Dependent Claim
12 words
A composition of claim 1 wherein the initiator is an ultraviolet initiator.
Claim 5
Dependent Claim
18 words
A composition of claim 1 wherein the initiator is a hydroperoxide and the composition has anaerobic curing properties.
Claim 6
Dependent Claim
23 words
A composition of claim 1 containing no glass powder and about equal parts by weight each of glass microballoons, beads and milled fibers.
Claim 7
Dependent Claim
13 words
A composition of claim 1 containing in addition a silane or silanized glass.
Claim 8
Dependent Claim
123 words
An ultraviolet curable adhesive and sealant composition, curable through gaps of at least 5 mils and having, when cured, improved resistance to degradation by thermal cycling, comprising: (a) one or more acrylate-terminated, urethane-containing free radical curable monomers or oligomers; (b) an ultraviolet initiator of free radical polymerization; (c) an acidic accelerator of free radical polymerization; (d) a fumed silica thixotropic agent in sufficient quantity to produce a viscosity in the composition of about 5,000 to about 10,000 centipoises; and (e) about 8-12% by weight of the total composition of a glass filler mixture consisting essentially of, by weight based on the total glass filler mixture: (1) about 30-35% glass microballoons; (2) about 30-35% solid glass beads; and (3) about 30-35% milled glass fibers.
Claim 9
Dependent Claim
123 words
An ultraviolet curable adhesive and sealant composition, curable through gaps of at least 5 mils and having, when cured, improved resistance to degradation by thermal cycling, comprising: (a) one or more acrylate-terminated, urethane-containing free radical curable monomers or oligomers; (b) an ultraviolet initiator of free radical polymerization; (c) an acidic accelerator of free radical polymerization; (d) a fumed silica thixotropic agent in sufficient quantity to produce a viscosity in the composition of about 5,000 to about 10,000 centipoises; and (e) about 8-12% by weight of the total composition of a glass filler mixture consisting essentially of, by weight based on the total glass filler mixture: (1) about 30-35% glass microballoons; (2) about 30-35% solid glass beads; and (3) about 30-35% milled glass fibers.
Claim 10
Dependent Claim
121 words
A composition of claim 7 wherein the monomer has the formula ##STR8## wherein R 1 is a member selected from the class consisting of hydrogen, chlorine and methyl and ethyl radicals; R 2 is a divalent organic radical selected from the group consisting of lower alkylene of 1 through 8 carbon atoms, phenylene and naphthylene; X is selected from the group consisting of --O-- and ##STR9## R 3 is selected from the group consisting of hydrogen and lower alkyl of 1 through 7 carbon atoms; n is an integer from 2 to about 6; and B is a polyvalent organic radical selected from the group consisting of alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl, aralkyl, alkaryl and heterocyclic radicals both substituted and unsubstituted.
Claim 11
Dependent Claim
13 words
A composition of claim 8 wherein the ultraviolet initiator is a benzoin ether.
Claim 12
Dependent Claim
12 words
A composition of claim 9 wherein the acidic accelerator is benzoic sulfimide.
Claim 13
Dependent Claim
15 words
A composition of claim 7 containing in addition an amine accelerator of free radical polymerization.
Claim 14
Dependent Claim
15 words
A composition of claim 7 containing in addition a peroxy initiator of free radical polymerization.
Claim 15
Dependent Claim
12 words
A composition of claim 12 wherein the peroxy initiator is cumene hydroperoxide.
Claim 16
Dependent Claim
13 words
A composition of claim 7 containing in addition a silane or silanized glass.
References Cited (Backward Citations)
US3013915A
Cited
US3240736A
Cited
US3287197A
Cited
US3218305A
Cited
US3425988A
Cited
US3607825A
Cited
US3891523A
Cited
US3707521A
Cited
US3642675A
Cited
US3725355A
Cited
US3825518A
Cited
US3971753A
Cited
US3932311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |