US3933712A
Expired / Lapsed
US
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Novel encapsulating material and method
Assignee: Texas Instruments Tucson Corp
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Filing: 1975-03-24
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Granted: 1976-01-20
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Expires: 1995-03-24
Abstract
Abstract A novel encapsulating material and method of making said material is described wherein an organopolysiloxane polymer is mixed with a polydimethyl siloxane fluid diluent, a filler of hollow glass beads and a controlled amount of sodium in the form of sodium borate. A methyl hydrogen siloxane catalyst is added to the mixture and the material cured; the total amount of sodium present in the mixture and catalyst is maintained at approximately 180 ppm.
Inventors
- 👤 John J. Vanaglash, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:10
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C; C08; C08K; C08K3/00; C08K3/18; C08K3/34; C08K3/38; C08K5/00; C08K5/0008; C08K5/0025; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
The method of making an encapsulating material comprising the steps: a. forming a mixture of organopolysiloxane polymer, a polydimethyl siloxane fluid diluent, sodium borate and a filler taken from the group consisting of: 1. hollow glass beads, 2. aluminum oxide, 3. silica, 4. calcium carbonate, 5. glass fiber, said mixture having a polymer to diluent ratio of about 1:0.2 to 1:1.5 by weight and having a polymer to filler ratio of about 1:1 by volume; b. adding sufficient methyl hydrogen siloxane catalyst to substantially completely polymerize said polymer; c. controlling the amount of sodium in said mixture and catalyst to a total sodium content of from about 125 ppm to about 300 ppm by weight of the total mixture and catalyst; and d. curing said mixture for a time and at a temperature sufficient to substantially completely polymerize said polymer.
Claim 2
Independent Claim
140 words
The method of making an encapsulating material comprising the steps: a. forming a mixture of organopolysiloxane polymer, a polydimethyl siloxane fluid diluent, sodium borate and a filler taken from the group consisting of: 1. hollow glass beads, 2. aluminum oxide, 3. silica, 4. calcium carbonate, 5. glass fiber, said mixture having a polymer to diluent ratio of about 1:0.2 to 1:1.5 by weight and having a polymer to filler ratio of about 1:1 by volume; b. adding sufficient methyl hydrogen siloxane catalyst to substantially completely polymerize said polymer; c. controlling the amount of sodium in said mixture and catalyst to a total sodium content of from about 125 ppm to about 300 ppm by weight of the total mixture and catalyst; and d. curing said mixture for a time and at a temperature sufficient to substantially completely polymerize said polymer.
Claim 3
Independent Claim
127 words
The method of making an encapsulating material comprising the steps: a. forming a mixture of silicone polymer, a polydimethyl siloxane fluid diluent, sodium borate and hollow glass beads, said mixture having a polymer to diluent ratio of about 1:0.2 to 1:1.5 by weight and having a polymer to glass bead ratio of about 5:1 to 3:1 by weight; b. adding sufficient methyl hydrogen siloxane catalyst to substantially completely polymerize said polymer; c. adding sodium borate to bring the amount of sodium in said mixture and catalyst to a total sodium content of from about 125 ppm to about 300 ppm by weight of the total mixture and catalyst; and d. curing said mixture for a time and at a temperature sufficient to substantially completely polymerize said polymer.
Claim 4
Independent Claim
127 words
The method of making an encapsulating material comprising the steps: a. forming a mixture of silicone polymer, a polydimethyl siloxane fluid diluent, sodium borate and hollow glass beads, said mixture having a polymer to diluent ratio of about 1:0.2 to 1:1.5 by weight and having a polymer to glass bead ratio of about 5:1 to 3:1 by weight; b. adding sufficient methyl hydrogen siloxane catalyst to substantially completely polymerize said polymer; c. adding sodium borate to bring the amount of sodium in said mixture and catalyst to a total sodium content of from about 125 ppm to about 300 ppm by weight of the total mixture and catalyst; and d. curing said mixture for a time and at a temperature sufficient to substantially completely polymerize said polymer.
Claim 5
Independent Claim
120 words
The method of making an encapsulating material comprising the steps: a. forming a mixture of organopolysiloxane, a polydimethyl siloxane fluid diluent, sodium borate and hollow glass beads, said mixture having a polymer to diluent ratio of about 1:0.2 to 1:1.5 by weight and having a polymer to glass bead ratio of about 5:1 to 3:1 by weight; b. adding sufficient methyl hydrogen siloxane catalyst to substantially completely polymerize said polymer; c. controlling the amount of sodium in said mixture and catalyst to a total sodium content of about 100 ppm to about 200 ppm by weight of the total mixture and catalyst; and d. curing said mixture for a time and at a temperature sufficient to substantially polymerize said polymer.
Claim 6
Independent Claim
120 words
The method of making an encapsulating material comprising the steps: a. forming a mixture of organopolysiloxane, a polydimethyl siloxane fluid diluent, sodium borate and hollow glass beads, said mixture having a polymer to diluent ratio of about 1:0.2 to 1:1.5 by weight and having a polymer to glass bead ratio of about 5:1 to 3:1 by weight; b. adding sufficient methyl hydrogen siloxane catalyst to substantially completely polymerize said polymer; c. controlling the amount of sodium in said mixture and catalyst to a total sodium content of about 100 ppm to about 200 ppm by weight of the total mixture and catalyst; and d. curing said mixture for a time and at a temperature sufficient to substantially polymerize said polymer.
Claim 7
Independent Claim
121 words
The method of making an encapsulating material comprising the steps: a. forming a mixture of organopolysiloxane, a polydimethyl siloxane fluid diluent, sodium borate and a filler of hollow spherical glass beads, said mixture having a polymer to diluent ratio of about 1:1 by weight and having a polymer to filler ratio of about 4:1 by weight; b. adding from approximately 8% to approximately 11% by weight a methyl hydrogen siloxane catalyst to said mixture; c. controlling the amount of sodium in said mixture and catalyst to a total sodium content of about 180 ppm by weight of the total mixture and catalyst; and d. curing said mixture for a time and at a temperature sufficient to substantially completely polymerize said polymer.
Claim 8
Independent Claim
121 words
The method of making an encapsulating material comprising the steps: a. forming a mixture of organopolysiloxane, a polydimethyl siloxane fluid diluent, sodium borate and a filler of hollow spherical glass beads, said mixture having a polymer to diluent ratio of about 1:1 by weight and having a polymer to filler ratio of about 4:1 by weight; b. adding from approximately 8% to approximately 11% by weight a methyl hydrogen siloxane catalyst to said mixture; c. controlling the amount of sodium in said mixture and catalyst to a total sodium content of about 180 ppm by weight of the total mixture and catalyst; and d. curing said mixture for a time and at a temperature sufficient to substantially completely polymerize said polymer.
Claim 9
Dependent Claim
11 words
The novel encapsulating material produced by the method of claim 1.
Claim 10
Dependent Claim
19 words
A novel polymerized silicone encapsulating material having hollow glass beads therein and produced by the method of claim 2.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |