US4814409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysiloxane-polyoxyalkylene terpolymers for polyurethane foam manufacture
Assignee: General Electric Co
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Filing: 1987-08-31
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Granted: 1989-03-21
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Expires: 2007-08-31
Abstract
Abstract A polysiloxane-polyoxyalkylene composition of the nominal formula: <IMAGE> +TR <IMAGE> wherein R is an alkyl group having 1 to 3 carbon atoms and R DEG , R', R'' and R''' are individually monovalent polyoxyalkylene polyethers attached to the silicon atom through a difunctional link; and, the polyoxyalkylene of R' is a poly(oxyethylene-oxypropylene) ether which contains 20% to 60% oxyethylene by weight and has an average molecular weight of from about 3,000 to about 5,500; the polyoxyalkylene of R'' is a poly(oxyethylene-oxypropylene) ether which contains 20% to 60% oxyethylene by weight and has an average molecular weight of from about 800 to about 2,900; and the polyoxyalkylene of R''' is a polyoxypropylene polyether having an average molecular weight from about 130 to about 1200; R DEG can be R', R'' or R''', a and e are individually 0 or 1; b, c, and d are numbers such that b+c+d=y, x and y are positive numbers such that the sum of x+y ranges from 25 to 400 and x is greater than y; wherein the ratio (b+c):d ranges from 0.8 to 1.9.
Inventors
- 👤 II Charles H. Blevins
- 👤 William B. Herdle
- 👤 Gerald J. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:58
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G77/00; C08G77/42; C08G77/46; C08J2375/00; C08J2375/04; C08J2483/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
195 words
A polysiloxane-polyoxyalkylene composition of the nominal formula: ##STR4## wherein: R is an alkyl group having 1 to 3 carbon atoms; R' is a poly-(oxyethylen-oxypropylene) ether group which contains 20% to 60% oxyethylene by weight and which has an average molecular weight of from about 3,000 to about 5,500 and which is attached to the silicon atom through a difunctional link; R" is a poly-(oxyethylene-oxypropylene) ether group which contains 20% to 60% oxyethylene by weight and which has an average molecular weight of from about 800 to about 2,900 and which is attached to the silicon atom through a difunctional link; and R'" is a polyoxypropylene polyether group which has an average molecular weight from about 130 to about 1200 and which is attached to the silicon atom through a difunctional link; R o is R', R" or R'"; a and e are individually 0 or 1; either b is not equal to zero and/or c is not equal to zero; x, b,c and d are positive numbers such that the sum of x+b+c+d ranges from 25 to 400; and x is greater than the sum b+c+d; wherein the ratio (b+c):d is from 0.8 to 1.9.
Claim 2
Dependent Claim
195 words
A polysiloxane-polyoxyalkylene composition of the nominal formula: ##STR4## wherein: R is an alkyl group having 1 to 3 carbon atoms; R' is a poly-(oxyethylen-oxypropylene) ether group which contains 20% to 60% oxyethylene by weight and which has an average molecular weight of from about 3,000 to about 5,500 and which is attached to the silicon atom through a difunctional link; R" is a poly-(oxyethylene-oxypropylene) ether group which contains 20% to 60% oxyethylene by weight and which has an average molecular weight of from about 800 to about 2,900 and which is attached to the silicon atom through a difunctional link; and R'" is a polyoxypropylene polyether group which has an average molecular weight from about 130 to about 1200 and which is attached to the silicon atom through a difunctional link; R o is R', R" or R'"; a and e are individually 0 or 1; either b is not equal to zero and/or c is not equal to zero; x, b,c and d are positive numbers such that the sum of x+b+c+d ranges from 25 to 400; and x is greater than the sum b+c+d; wherein the ratio (b+c):d is from 0.8 to 1.9.
Claim 3
Dependent Claim
30 words
The composition of claim 1 wherein the polyoxyalkylene polyethers terminate with an alkoxy group having 1 to 4 carbon atoms or an acyloxy group of a lower aliphatic carboxylic acid.
Claim 4
Dependent Claim
11 words
The composition of claim 2 wherein the terminal group is acetoxy.
Claim 5
Dependent Claim
9 words
The composition of claim 1 wherein R is methyl.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein the sum of x+b+c+d from 35 to 400.
Claim 7
Dependent Claim
15 words
The composition of claim 1 wherein the sum of x+b+c+d is from 40 to 260.
Claim 8
Dependent Claim
26 words
The composition of claim 1 wherein said difunctional link is represented by the formula --CnH 2n --O--, wherein n is a number from 0 to 6.
Claim 9
Dependent Claim
14 words
The composition of claim 7 wherein n is a number from 0 to 4.
Claim 10
Dependent Claim
11 words
The composition of claim 8 wherein n is 3 or 4.
Claim 11
Dependent Claim
18 words
The composition of claim 1 wherein the numerical ratio of x:b+c+d is from about 3:1 to about 15:1.
Claim 12
Dependent Claim
28 words
The composition of claim 1 wherein the polyoxypropylene polyether of R'" comprises a polyoxypropylene polyether with a hydroxyl group attached to the terminal carbon of the polyoxypropylene polyether.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
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