US3764574A
Expired / Lapsed
US
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Zinc-siloxane polymer and coating and method for making the same
Assignee: Lockheed Martin Corp
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Filing: 1970-08-13
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Granted: 1973-10-09
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Expires: 1990-08-13
Abstract
Abstract WHERE R1 is a phenyl group and n is greater than 2. The zincphenylsiloxane copolymers prepared from dimers, trimers, tetramers, pentamers, and hexamers of the anhydrous hydrolysis and alcoholysis product of phenyltrichlorosilane also have all the zinc ions in between (O - Si - O) groups, but need not be strictly in ordered sequence if there are additional interspersed (O - Si - O) groups. These polymeric reactants all have a functionality greater than 2 when reacting with anhydrous zinc acetate. The zincphenylsioloxane polymer may thereafter be blended with a non-migrating plasticizer and coreactant silicone monomer and cured. A zincphenylsiloxane polymer made by reacting a zinc salt such as anhydrous zinc acetate with a difunctional diphenylsiloxane monomer such as diphenyldialkoxysilane or with a trifunctional or polyfunctional silane polymer, such as the anhydrous hydrolysis and alcoholysis product of phenyl-trichlorosilane, using heat sufficient to insure that reaction occurs (about 200*C) which can be noted by the distillation of alkyl acetate, a by-product of the reaction. The functionally of the silane monomer in the above difunctional polymer is 2, in that it reacts through its two alcoholate groups to form the ordered-sequence copolymer polyzincphenylsiloxane having the repeated bonding:
Inventors
- 👤 B Marks
- 👤 P Chiesa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:54
CPC Classifications
C; C08; C08L; C08L85/00; C08G; C08G77/00; C08G77/48; C08G77/58; C08G79/00; H; H10; H10F; H10F77/00; H10F77/40; H10F77/42; H10F77/45; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/52
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
11 words
The coating composition of claim 1 wherein said plasticizer is triphenylphosphite.
Claim 2
Dependent Claim
14 words
The coating composition of claim 1 wherein an organic fluorescent compound is incorporated therein.
Claim 3
Dependent Claim
22 words
The coating composition of claim 2 containing a fluorescent compound chosen from the group consisting of anthracene, anthraquinone, 1,2-benzanthracene, fluoranthene, and 9,10-diphenylanthracene.
Claim 4
Dependent Claim
205 words
A coating composition, consisting essentially of: polyzincphenylsiloxane 4 parts by weight diphenyldihydroxysilane 0.5 to 2.2 parts by weight a non-migrating plasticizer 0.0 to 1.0 parts by weight a strong acid 0.3 to 1.0 parts by weight dimethylformamide enough to dissolve the ingredients said polyzincphenylsiloxane being the polymerized reaction product of: a. the colorless liquid resulting from partial hydrolysis followed by alcoholysis of anhydrous phenyltrichlorosilane, said liquid having an average molecular weight of from 500 to 2,000 and an alkoxy functionality of from 4 to 8, and b. anhydrous zinc acetate, wherein the molar ratio of zinc acetate to the total number of alkoxy groups in (a) is between 1:2 and 1:3 , the reaction taking place in an anhydrous solvent for the zinc acetate, said solvent having a boiling point above 200*C, so that alkyl acetate is distilled off until no more can be distilled off at that temperature, the solvent then being distilled off, said reaction product being a polyzincphenylsiloxane solid, yellow in color, and stable at a temperature of 300*C, soluble in anhydrous 1,2.4-trichlorobenzene, and having each Zn ion therein bonded between two - O Si -O - sequences, said solid having a broad infrared absorption peak between 920 to 945 cm 1.
Claim 5
Dependent Claim
11 words
The coating composition of claim 5 wherein said alkoxy is ethoxy.
Claim 6
Dependent Claim
11 words
The coating composition of claim 5 wherein said alkoxy is methoxy.
Claim 7
Dependent Claim
80 words
The coating composition of claim 5 consisting essentially of: the polyphenylzincsiloxane 4 parts By weight dimethylformamide 16 parts by weight diphenyldihydroxysilane 1 part by weight triphenylphosphite 0.3 part by weight hydrofluoric acid, 49 % 0.6 part by weight said polyphenylzincsiloxane being made by reacting 0.8 to 0.9 moles of zinc acetate with 2.0 moles of alkoxy contained in the resin prepared from hydrolized and alcoholyzed phenyltrichlorosilane and having a molecular weight of about 500 and an alkoxy functionality of 4.
Claim 8
Independent Claim
109 words
The method of curing polyzincphenylsiloxane having the repeated groups and made by reacting a. the colorless liquid resulting from partial hydrolysis followed by alcoholysis of anhydrous phenyltrichlorosilane, said liquid having an average molecular weight of from 500 to 2,000 and an ethoxy functionality of from 4 to 8, with b. anhydrous zinc acetate, wherein the molar ratio of zinc acetate to the total number of alkoxy groups in (a) is between 1:2 and 1:3, comprising reacting 4 parts by weight of said polyzincphenylsiloxane with 0.3 to 1.0 parts by weight of a strong acid and 0.0 to 1.0 parts by weight of a non-migrating plasticizer to form a resin.
Claim 9
Dependent Claim
10 words
The method of claim 9 wherein said plasticizer is triphenylphosphite.
Claim 10
Independent Claim
121 words
A method of making a coating composition comprising reacting in a solvent for all the ingredients, 4 parts by weight of polyzincphenylsiloxane, 0.5 to 2.2 parts by weight of diphenyldihydroxysilane, 0.0 to 1.0 parts by weight of a non-migrating plasticizer therefor, and 0.3 to 1.0 parts by weight of a strong acid, said polyzincphenylsiloxane comprising the polymerized reaction product of: a. the colorless liquid resulting from partial hydrolysis followed by alcoholysis of anhydrous phenyltrichlorosilane, said liquid having an average molecular weight of from 500 to 2,000 and an ethoxy functionality of from 4 to 8, and b. anhydrous zinc acetate, wherein the molar ratio of zinc acetate to the total number of alkoxy groups in (a) is between 1:2 and 1:3.
Claim 11
Dependent Claim
10 words
The method of claim 11 wherein said plasticizer is triphenylphosphite.
Claim 12
Dependent Claim
10 words
The method of claim 1 wherein said acid is hydrofluoric.
Claim 13
Dependent Claim
26 words
The method of claim 11 wherein the ingredients and parts by weight are as follows: polyphenylzincsiloxane 4 dimethylformamide 16 diphenyldihydroxysilane 1 triphenylphosphite 0.3 hydrofluoric acid 0.6
Claim 14
Dependent Claim
35 words
The method of claim 14 wherein said polyphenylzincsiloxane is made by reacting 0.8 to 0.9 moles of zinc acetate with 2.0 moles of ethoxy functionality contained in the resin prepared by hydrolyzing and ethanolyzing phenyltrichlorosilane.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |