US4133796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature resistant hot melt sealant
Assignee: Union Carbide Corp
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Filing: 1977-11-17
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Granted: 1979-01-09
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Expires: 1997-11-17
Abstract
Abstract Hot melt compositions having good mechanical properties at elevated temperatures after post curing have been prepared by blending ethylene copolymers with a rubber, a phenolic resin, epoxy resin, and a filler formulated to 100% by weight solids.
Inventors
- 👤 Allan R. Bullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:02
CPC Classifications
C; C09; C09J; C09J121/00; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J163/00; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
173 words
Hot melt sealant composition comprising: (A) about 5 to about 50 percent by weight of an ethylene copolymer selected from the group consisting of: (a) ethylene/vinyl acetate copolymers having a melt index of about 1 to about 500 dg./min. containing about 3 to about 40 percent by weight of vinyl acetate copolymerized therein and (b) ethylene/alkyl acrylate or methacrylate copolymers having a melt index of about 1 to about 500 dg./min. containing about 3 to about 35 percent by weight of an alkyl acrylate or methacrylate copolymerized therein wherein the alkyl group contains about 3 to about 6 carbon atoms; (B) about 5 to about 50 percent by weight of a rubber or elastomer; (C) about 5 to about 50 percent by weight of at least one alkyl substituted phenolic resin; (D) about 2 to about 40 percent by weight of an epoxy resin containing at least 2 epoxy units per molecule; and (E) about 20 to about 70 percent by weight of filler, all based on the weight of the total composition.
Claim 2
Dependent Claim
173 words
Hot melt sealant composition comprising: (A) about 5 to about 50 percent by weight of an ethylene copolymer selected from the group consisting of: (a) ethylene/vinyl acetate copolymers having a melt index of about 1 to about 500 dg./min. containing about 3 to about 40 percent by weight of vinyl acetate copolymerized therein and (b) ethylene/alkyl acrylate or methacrylate copolymers having a melt index of about 1 to about 500 dg./min. containing about 3 to about 35 percent by weight of an alkyl acrylate or methacrylate copolymerized therein wherein the alkyl group contains about 3 to about 6 carbon atoms; (B) about 5 to about 50 percent by weight of a rubber or elastomer; (C) about 5 to about 50 percent by weight of at least one alkyl substituted phenolic resin; (D) about 2 to about 40 percent by weight of an epoxy resin containing at least 2 epoxy units per molecule; and (E) about 20 to about 70 percent by weight of filler, all based on the weight of the total composition.
Claim 3
Dependent Claim
14 words
Composition claimed in claim 1 wherein the ethylene copolymer is an ethylene/vinyl acetate copolymer.
Claim 4
Dependent Claim
16 words
Composition claimed in claim 1 wherein the ethylene copolymer is an ethylene/alkyl acrylate or methacrylate copolymer.
Claim 5
Dependent Claim
11 words
Composition claimed in claim 3 wherein the alkyl group is ethyl.
Claim 6
Dependent Claim
13 words
Composition claimed in claim 1 wherein the rubber is a crosslinked butyl rubber.
Claim 7
Dependent Claim
12 words
Composition claimed in claim 1 wherein the rubber is an ethylene/propylene copolymer.
Claim 8
Dependent Claim
12 words
Composition claimed in claim 1 wherein the rubber is an ethylene/propylene terpolymer.
Claim 9
Dependent Claim
21 words
Composition claimed in claim 1 wherein the phenolic resin is a heat-reactive condensation product of an alkyl substituted phenol and formaldehyde.
Claim 10
Dependent Claim
14 words
Composition claimed in claim 8 wherein the alkyl contains 1 to about 5 carbons.
Claim 11
Dependent Claim
30 words
Composition claimed in claim 1 wherein the phenolic resin is a non-heat reactive condensation product of an alkyl phenol and formaldehyde wherein the alkyl contains 1 to about 5 carbons.
Claim 12
Dependent Claim
19 words
Composition claimed in claim 1 wherein the epoxy resin is a homolog of the diglycidyl ether of bisphenol A.
Claim 13
Dependent Claim
19 words
Composition claimed in claim 11 wherein the epoxy resin is a mixture of normally solid and normally liquid resins.
Claim 14
Dependent Claim
13 words
Composition claimed in claim 1 wherein the filler is an alkaline earth compound.
Claim 15
Dependent Claim
13 words
Composition claimed in claim 13 wherein the alkaline earth compound is calcium carbonate.
Claim 16
Dependent Claim
13 words
Composition claimed in claim 13 wherein the alkaline earth compound is barium sulfate.
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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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |