US4092282A
Expired / Lapsed
US
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Hot melt sealant composition
Assignee: Cities Service Co
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Filing: 1977-08-19
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Granted: 1978-05-30
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Expires: 1997-08-19
Abstract
Abstract Hot melt sealant compositions having superior adhesive bonding properties comprise butyl rubber, plasticizing or tackifying resins, and a reacted mixture of an alkaline earth metal hydroxide and a solid polyamide resin having a high amine value.
Inventors
- 👤 John E. Callan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:03
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/18; C09J123/20; C09J123/22; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C08L2666/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
A hot melt sealant composition comprising (A) a butyl rubber component, (B) a resin selected from the group consisting of plasticizing and tackifying resins, and (C) a reacted mixture of (1) about 25-100 phr of a solid polyamide resin having a molecular weight less than 10,000 and an amine value greater than about 50 and (2) an amount of an alkaline earth metal hydroxide selected from the group consisting of magnesium, calcium, strontium, and barium hydroxides such as to provide a polyamide/hydroxide weight ratio of about 10-20/l.
Claim 2
Dependent Claim
87 words
A hot melt sealant composition comprising (A) a butyl rubber component, (B) a resin selected from the group consisting of plasticizing and tackifying resins, and (C) a reacted mixture of (1) about 25-100 phr of a solid polyamide resin having a molecular weight less than 10,000 and an amine value greater than about 50 and (2) an amount of an alkaline earth metal hydroxide selected from the group consisting of magnesium, calcium, strontium, and barium hydroxides such as to provide a polyamide/hydroxide weight ratio of about 10-20/l.
Claim 3
Dependent Claim
28 words
The composition of claim 1 wherein the butyl rubber component is a slightly crosslinked butyl rubber having a Mooney viscosity (ML 1+3 at 260° F.) of about 50-60.
Claim 4
Dependent Claim
78 words
The composition of claim 1 wherein the butyl rubber component is a blend of (A) a butyl rubber, (B) an ethylene-vinyl acetate copolymer, and (C) a thermoplastic segmented copolyester elastomer consisting essentially of about 15-30% by weight of ester units derived from butanediol and a phthalic acid and about 85-70% by weight of units derived from polytetramethylene ether glycol 1500-3500 and a phthalic acid, about 55-95% by weight of the phthalate units of the copolyester being terephthalate units.
Claim 5
Dependent Claim
79 words
The composition of claim 1 wherein the butyl rubber component is a blend of (A) a butyl rubber, (B) a styrene-ethylenebutylene-styrene block copolymer rubber, and (C) a thermoplastic segmented copolyester elastomer consisting essentially of about 15-30% by weight of ester units derived from butanediol and a phthalic acid and about 85-70% by weight of units derived from polytetramethylene ether glycol 1500-3500 and a phthalic acid, about 55-95% by weight of the phthalate units of the copolyester being terephthalate units.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |