US3846462A
Expired / Lapsed
US
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Organosilicone polymers
Assignee: Union Carbide Corp
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Filing: 1972-08-11
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Granted: 1974-11-05
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Expires: 1992-08-11
Abstract
Abstract Organosilicone polymers are provided which comprise polysiloxane-polyoxyalkylene block copolymers wherein the polysiloxane blocks are trialkylsiloxy-endblocked and contain reoccurring difunctional dialkylsiloxy monomeric units in combination with reoccurring difunctional cyanoalkyl-alkylsiloxy or cyanoalkoxy-alkylsiloxy monomeric units, the mol ratio of the dialkylsiloxy units to the cyano-substituted siloxy units being about 10-200:3-100, and wherein the polysiloxane and polyoxyalkylene blocks are joined through an Si-C or an Si-O-C linkage, and from about 20 to about 65 weight per cent of the oxyalkylene units of the polyoxyalkylene blocks are constituted of oxy-ethylene units. The block copolymers of the invention are effective stabilizers of flexible polyether polyol-based polyurethane foams and offer particular advantage in the formation of flame-retarded foams. Also provided is a particular class of cyano-substituted polyalkylsiloxane hydrides which are useful in the preparation of the aforesaid block copolymers.
Inventors
- 👤 B Prokai
- 👤 B Kanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:56
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G77/00; C08G77/42; C08G77/46; C08J2375/00; C08J2375/04; C08J2375/08; C08J2483/00
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
101 words
ORGANOSILICONE COMPOSITIONS WHICH COMPRISES POLYSILOXANE-POLYOXYALKYLENE BLOCK COPOLYMERS IN WHICH THE AVERAGE NUMBER OF POLYOXYALKYLENE BLOCKS IS BETWEEN ABOUT 2 AND ABOUT 30 AND FROM ABOUT 20 TO ABOUT 65 WEIGHT PERCENT OF THE OXYALKYLENE CONTENT OF SAID POLYOXYALKYLENE BLOCKS IS CONSTITUTED OF OXYETHYLENE UNITS, AND IN WHICH THE POLYSILOXANE BACKBONE IS ENDLOCKED BY TRIALKYLSILOXY UNITS AND CONTAINS AN AVERAGE OF BETWEEN ABOUT 10 AND ABOUT 200 DIALKYLSILOXY UNITS AND AN AVERAGE OF BETWEEN ABOUT 3 AND ABOUT 100 DIFUNCTIONAL MONOALKYLSILOXY UNITS THE RESPECTIVE SILICON ATOMS OF WHICH ARE FURTHER BONDED TO A CYANOALKYL GROUP OR TO OYXGEN OF A CYANOALKOXY GROUP.
Claim 2
Dependent Claim
101 words
ORGANOSILICONE COMPOSITIONS WHICH COMPRISES POLYSILOXANE-POLYOXYALKYLENE BLOCK COPOLYMERS IN WHICH THE AVERAGE NUMBER OF POLYOXYALKYLENE BLOCKS IS BETWEEN ABOUT 2 AND ABOUT 30 AND FROM ABOUT 20 TO ABOUT 65 WEIGHT PERCENT OF THE OXYALKYLENE CONTENT OF SAID POLYOXYALKYLENE BLOCKS IS CONSTITUTED OF OXYETHYLENE UNITS, AND IN WHICH THE POLYSILOXANE BACKBONE IS ENDLOCKED BY TRIALKYLSILOXY UNITS AND CONTAINS AN AVERAGE OF BETWEEN ABOUT 10 AND ABOUT 200 DIALKYLSILOXY UNITS AND AN AVERAGE OF BETWEEN ABOUT 3 AND ABOUT 100 DIFUNCTIONAL MONOALKYLSILOXY UNITS THE RESPECTIVE SILICON ATOMS OF WHICH ARE FURTHER BONDED TO A CYANOALKYL GROUP OR TO OYXGEN OF A CYANOALKOXY GROUP.
Claim 3
Dependent Claim
22 words
The compositions of claim 1 in which the said cyanoalkyl and cyanoalkoxy groups contain from 2 to 12 carbon atoms per group.
Claim 4
Dependent Claim
12 words
The compositions of claim 1 in which said cyanoalkyl group is cyanopropyl.
Claim 5
Dependent Claim
12 words
The compositions of claim 1 in which said cyanoalkoxy group is cyanopropoxy.
Claim 6
Dependent Claim
25 words
The compositions of claim 1 in which said endblocking groups are trimethylsiloxy, said dialkylsiloxy units are dimethylsiloxy, and said cyano-bearing monoalkylsiloxy units are cyanopropylmethylsiloxy units.
Claim 7
Dependent Claim
26 words
The compositions of claim 5 in which the polysiloxane and polyoxyalkylene blocks are joined through a bivalent alkylene radical having from 2 to 6 carbon atoms.
Claim 8
Dependent Claim
18 words
The compositions of claim 5 in which the polysiloxane and polyoxyalkylene blocks are joined through a silicon-to-oxygen linkage.
Claim 9
Dependent Claim
49 words
The compositions of claim 1 in which said polysiloxane backbone contains an average of between about 20 and about 100 of said dialkylsiloxy units, between about 4 and about 30 of said cyano-bearing difunctional monoalkylsiloxy units, and said copolymer contains no more than about 10 of said polyoxyalkylene blocks.
Claim 10
Dependent Claim
20 words
The compositions of claim 1 in which the oxyethylene units of the polyoxyalkylene blocks are in combination with oxypropylene units.
Claim 11
Dependent Claim
12 words
A polysiloxane-polyoxyalkylene block copolymer having the average composition represented by the formula:
Claim 12
Dependent Claim
12 words
A polysiloxane-polyoxyalkylene block copolymer having the average composition represented by the formula:
Claim 13
Dependent Claim
10 words
The copolymer of claim 10 in which p is zero.
Claim 14
Dependent Claim
13 words
The copolymer of claim 10 in which p has a value of 1.
Claim 15
Dependent Claim
20 words
The copolymer of claim 12 in which R'''' is a bivalent alkylene group having from 2 to 6 carbon atoms.
Claim 16
Dependent Claim
22 words
The copolymer of claim 12 in which R'''' is an -alkylene-NHC(O)- group wherein the free valence of alkylene is bonded to silicon.
Claim 17
Dependent Claim
21 words
The copolymer of claim 12 in which R'''' is an -alkylene-C(O)-group wherein the free valence of alkylene is bonded to silicon.
Claim 18
Dependent Claim
20 words
The copolymer of claim 10 in which W is a monovalent hydrocarbon group having from 1 to 12 carbon atoms.
Claim 19
Dependent Claim
12 words
The copolymer of claim 10 in which W is an acyl group.
Claim 20
Dependent Claim
12 words
The copolymer of claim 10 in which W is a carbamyl group.
Claim 21
Dependent Claim
8 words
Organosilicone compositions comprising polymers having the average formula:
Claim 22
Dependent Claim
8 words
Organosilicone compositions comprising polymers having the average formula:
Claim 23
Dependent Claim
26 words
The compositions of claim 19 in which p has a value of one, e has a value of three, and R** is a lower alkyl group.
Claim 24
Dependent Claim
17 words
The compositions of claim 19 in which p is zero and R** is a lower alkyl group.
Claim 25
Dependent Claim
8 words
Organosilicone compositions comprising polymers having the average formula:
Claim 26
Dependent Claim
8 words
Organosilicone compositions comprising polymers having the average formula:
Claim 27
Dependent Claim
26 words
The compositions of claim 22 in which p has a value of one, e has a value of three, and R** is a lower alkyl group.
Claim 28
Dependent Claim
17 words
The compositions of claim 22 in which p is zero and R** is a lower alkyl group.
Claim 29
Dependent Claim
8 words
Organosilicone compositions comprising polymers having the average formula:
Claim 30
Dependent Claim
8 words
Organosilicone compositions comprising polymers having the average formula:
Claim 31
Dependent Claim
10 words
Compositions as defined in claim 25 wherein R** is methyl.
Claim 32
Dependent Claim
75 words
Organosilicone compositions comprising cyano-substituted polyalkylsiloxane hydrides having a polysiloxane backbone and trialkylsiloxy end-blocking units, said polysiloxane backbone containing: (a) an average of between about 10 and about 200 reoccurring dialkylsiloxy units, (b) an average of between about 3 and about 100 reoccurring monoalkylsiloxy units in which silicon is further bonded to a cyanoalkyl group or to oxygen of a cyanoalkoxy group, and (c) an average of between about 2 and about 30 reoccurring monoalkylhydrogensiloxy units.
Claim 33
Dependent Claim
75 words
Organosilicone compositions comprising cyano-substituted polyalkylsiloxane hydrides having a polysiloxane backbone and trialkylsiloxy end-blocking units, said polysiloxane backbone containing: (a) an average of between about 10 and about 200 reoccurring dialkylsiloxy units, (b) an average of between about 3 and about 100 reoccurring monoalkylsiloxy units in which silicon is further bonded to a cyanoalkyl group or to oxygen of a cyanoalkoxy group, and (c) an average of between about 2 and about 30 reoccurring monoalkylhydrogensiloxy units.
Claim 34
Dependent Claim
14 words
Organosilicone polymers comprising cyanoalkyl-substituted polyalkylsiloxane hydrides having an average composition represented by the formula:
Claim 35
Dependent Claim
14 words
Organosilicone polymers comprising cyanoalkyl-substituted polyalkylsiloxane hydrides having an average composition represented by the formula:
Claim 36
Dependent Claim
14 words
Organosilicone polymers as defined in claim 28 wherein -R*-CN of said formula is -(CH2)3-CN.
References Cited (Backward Citations)
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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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |