Patent EP0731458A1 successfully refreshed from Google Patents.
US4283316A
Expired / Lapsed
US
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Surface modification of alumina hydrate with liquid fatty acids
Assignee: Alcoa Corp
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Filing: 1980-09-12
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Granted: 1981-08-11
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Expires: 2000-09-12
Abstract
Abstract A surface modified alumina hydrate composition compatible with thermoplastic resins when used as a flame retardant and smoke suppressing filler. Surface modification is accomplished by treating powdered alumina hydrate with about 0.2 to 5 percent by weight of a liquid mixture of C10-C20 carboxylic acids having a titer below about 30 DEG C. and an iodine value of about 15 or less. In a preferred embodiment, the alumina hydrate has a particle size of less than about two microns, and the liquid mixture of acids comprises isostearic acid.
Inventors
- 👤 Patrick V. Bonsignore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:25
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
70 words
A surface modified alumina hydrate composition compatible with thermoplastic resins, said composition comprising powdered alumina hydrate having an average particle size of less than about 15 microns, and about 0.2 to 5 percent, based on the weight of the alumina hydrate, of a liquid mixture of C 10 -C 20 carboxylic acids, said mixture having a titer below about 30° C. and an iodine value of about 15 or less.
Claim 2
Dependent Claim
70 words
A surface modified alumina hydrate composition compatible with thermoplastic resins, said composition comprising powdered alumina hydrate having an average particle size of less than about 15 microns, and about 0.2 to 5 percent, based on the weight of the alumina hydrate, of a liquid mixture of C 10 -C 20 carboxylic acids, said mixture having a titer below about 30° C. and an iodine value of about 15 or less.
Claim 3
Dependent Claim
20 words
The composition of claim 1 wherein said mixture of carboxylic acids has an iodine value of about 12 or less.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein said acids are C 16 -C 20 carboxylic acids.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein said mixture of acids comprises isostearic acid.
Claim 6
Dependent Claim
18 words
The composition of claim 1 wherein the titer of said mixture of acids is below about 20° C.
Claim 7
Dependent Claim
19 words
The composition of claim 1 wherein the titer of said mixture of acids is about 8° to 10° C.
Claim 8
Dependent Claim
18 words
The composition of claim 1 containing about 0.2 to 2 percent of C 10 -C 20 carboxylic acids.
Claim 9
Dependent Claim
16 words
The composition of claim 7 containing about one percent of C 10 -C 20 carboxylic acids.
Claim 10
Dependent Claim
20 words
The composition of claim 1 wherein said alumina hydrate has an average particle size of less than about five microns.
Claim 11
Dependent Claim
20 words
The composition of claim 9 wherein said alumina hydrate has an average particle size of less than about two microns.
Claim 12
Dependent Claim
21 words
The composition of claim 10 wherein essentially all of said alumina hydrate has a particle size of less than two microns.
Claim 13
Dependent Claim
27 words
The composition of claim 1 wherein said alumina hydrate contains about 15 to 35% by weight water as determined by calcination at 1000° F. for one hour.
Claim 14
Dependent Claim
43 words
A thermoplastic resin compound comprising about 100 parts by weight of a thermoplastic resin selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride and mixtures and copolymers thereof, and up to about 190 parts by weight of the composition of claim 1.
Claim 15
Dependent Claim
11 words
The compound of claim 13 wherein said thermoplastic resin comprises polypropylene.
Claim 16
Dependent Claim
107 words
An improved method for dispersing powdered alumina hydrate having an average particle size of less than about 15 microns in a thermoplastic resin, said method comprising the steps of modifying the surface characteristics of the hydrate by mixing the hydrate with 0.2 to 5 percent by weight of a mixture of C 10 -C 20 carboxylic acids, said mixture having a titer below about 30° C. and an iodine value of about 15 or less, thereby to form a surface modified hydrate composition, and admixing up to 65 percent of the hydrate composition, based on total weight of the hydrate composition and resin, in a thermoplastic resin.
Claim 17
Dependent Claim
107 words
An improved method for dispersing powdered alumina hydrate having an average particle size of less than about 15 microns in a thermoplastic resin, said method comprising the steps of modifying the surface characteristics of the hydrate by mixing the hydrate with 0.2 to 5 percent by weight of a mixture of C 10 -C 20 carboxylic acids, said mixture having a titer below about 30° C. and an iodine value of about 15 or less, thereby to form a surface modified hydrate composition, and admixing up to 65 percent of the hydrate composition, based on total weight of the hydrate composition and resin, in a thermoplastic resin.
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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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |