US3935339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating particulate material thereof
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1973-07-16
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Granted: 1976-01-27
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Expires: 1993-07-16
Abstract
Abstract A Method of coating particulate materials (such as silica sand, glass beads, seeds and metal particles) with a liquid thermosetting epoxy resin which comprises agitating the epoxy resin with the particles in a nonpolar liquid, which is immiscible with the epoxy resin, and contains a nonionic surfactant having a molecular weight of at least 2,000 to retard the tendency of the epoxy coated particles to agglomerate during curing of the resin in the non-polar liquid. A suitable liquid for use as the immiscible liquid is a paraffinic oil which is aromatic-free and olefin-free.
Inventors
- 👤 Claude E. Cooke, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:26
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/226; C; C04; C04B; C04B20/00; C04B20/10; C04B20/1018; C04B20/1029; C04B20/1037; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
98 words
A method of forming free-flowing resin-coated particles which comprises: a. coating the particles of a particular substrate material with a liquid thermosetting epoxy resin; b. in the presence of a curing agent capable of curing said epoxy resin to a solid infusible state, agitating said coated particles in a nonpolar liquid immiscible with said liquid resin and containing a nonionic surfactant having a molecular weight of at least 2000 which retards agglomeration of said resin coated particles until said epoxy resin cures to a solid, infusible state; and thereafter c. removing the coated particles from said immiscible liquid.
Claim 2
Independent Claim
98 words
A method of forming free-flowing resin-coated particles which comprises: a. coating the particles of a particular substrate material with a liquid thermosetting epoxy resin; b. in the presence of a curing agent capable of curing said epoxy resin to a solid infusible state, agitating said coated particles in a nonpolar liquid immiscible with said liquid resin and containing a nonionic surfactant having a molecular weight of at least 2000 which retards agglomeration of said resin coated particles until said epoxy resin cures to a solid, infusible state; and thereafter c. removing the coated particles from said immiscible liquid.
Claim 3
Dependent Claim
13 words
A method as defined in claim 1 wherein said particles are silica sand.
Claim 4
Dependent Claim
13 words
A method as defined in claim 1 wherein said particles are metal particles.
Claim 5
Dependent Claim
15 words
A method as defined in claim 3 wherein said metal particles are of a ferroalloy.
Claim 6
Dependent Claim
21 words
A method as defined in claim 1 wherein said immiscible liquid comprises a hydrocarbon oil substantially free of aromatics and olefins.
Claim 7
Dependent Claim
22 words
A method as defined in claim 1 wherein said surfactant is a non-ionic surfactant having a molecular weight between 2000 and 10,000.
Claim 8
Dependent Claim
21 words
A method as defined in claim 1 wherein said surfactant is a condensate of ethylene oxide and propylene oxide with glycerine.
Claim 9
Dependent Claim
22 words
A method as defined in claim 1 wherein said surfactant is a condensate of ethylene oxide and propylene oxide with propylene glycol.
Claim 10
Dependent Claim
15 words
A method as defined in claim 1 wherein said liquid resin contains said curing agent.
Claim 11
Dependent Claim
26 words
A method as defined in claim 1 wherein the liquid resin deposited on the particles constitutes from 2 to 15 weight percent of the coated particles.
Claim 12
Dependent Claim
17 words
A method as defined in claim 10 wherein said liquid resin contains an organofunctional silane coupling agent.
Claim 13
Dependent Claim
27 words
A method as defined in claim 2 wherein said silica sand has a particle size between about 6 and 100 mesh on the U.S. Standard Sieve Series.
Claim 14
Independent Claim
107 words
A method of coating particulate material with a resin to form free-flowing, non-sticky, resin-coated particles which comprises: a. mixing said particulate material with a liquid thermosetting epoxy resin and a curing agent for said epoxy resin to deposit a coating which substantially covers each particle; b. curing said coated particles in contact with a nonpolar liquid immiscible with said resin and a minor amount of a nonionic surfactant having a molecular weight of at least 2000 until said resin cures to a hard, infusible state, said surfactant having the ability to retard agglomeration of said resin-coated particles; and thereafter c. removing said bath liquid containing said surfactant.
Claim 15
Independent Claim
107 words
A method of coating particulate material with a resin to form free-flowing, non-sticky, resin-coated particles which comprises: a. mixing said particulate material with a liquid thermosetting epoxy resin and a curing agent for said epoxy resin to deposit a coating which substantially covers each particle; b. curing said coated particles in contact with a nonpolar liquid immiscible with said resin and a minor amount of a nonionic surfactant having a molecular weight of at least 2000 until said resin cures to a hard, infusible state, said surfactant having the ability to retard agglomeration of said resin-coated particles; and thereafter c. removing said bath liquid containing said surfactant.
Claim 16
Dependent Claim
42 words
A method as defined in claim 13 wherein sufficient liquid resin is mixed with said particulate material to deposit a resin coating on said particles of between about 5 and about 15 weight percent based on the weight of the coated particles.
Claim 17
Dependent Claim
29 words
A method as defined in claim 12 wherein said nonionic surfactant is present in said nonpolar, immiscible liquid in a concentration between about 0.2 and about 3.0 weight percent.
Claim 18
Dependent Claim
22 words
A method as defined in claim 15 and further comprising heating said resin-coated particles to temperature sufficient to further cure the resin.
Claim 19
Dependent Claim
17 words
A method as defined in claim 1 wherein said curing agent is contained in said nonpolar liquid.
References Cited (Backward Citations)
US2807556A
Cited
US2829982A
Cited
US2965514A
Cited
US3026938A
Cited
US3492147A
Cited
US3539377A
Cited
US3586654A
Cited
US3677804A
Cited
US3706592A
Cited
UST908010I4
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |