US4133781A
Expired / Lapsed
US
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Smoke-retardant polyisocyanurate foam
Assignee: Mitsubishi Chemical Corp
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Filing: 1977-08-24
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Granted: 1979-01-09
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Expires: 1997-08-24
Abstract
Abstract A smoke-retardant polyisocyanurate foam which contains an organosilicate having hydroxypolyoxyalkylene group which is obtained by reacting a polyoxyalkyleneglycol with at least one of metallic silicon, halosilicon compounds and lower alkyl silicates.
Inventors
- 👤 Kaneyoshi Ashida
- 👤 Masaaki Ohtani
- 👤 Takashi Yokoyama
- 👤 Shoichi Ohkubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:31
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5096; C08G18/30; C08G18/38; C08G18/3893; C08G18/3895; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
52 words
A smoke-retardant polyisocyanurate foam which contains an organosilicate having hydroxypolyoxyalkylene group which is obtained by reacting a polyoxyalkyleneglycol with at least one of metalic silicon, halosilicon compounds and lower alkyl silicates wherein the amount of said organosilicate having hydroxypolyoxyalkylene group is in a range of 2 to 30 wt.% to the foam.
Claim 2
Dependent Claim
52 words
A smoke-retardant polyisocyanurate foam which contains an organosilicate having hydroxypolyoxyalkylene group which is obtained by reacting a polyoxyalkyleneglycol with at least one of metalic silicon, halosilicon compounds and lower alkyl silicates wherein the amount of said organosilicate having hydroxypolyoxyalkylene group is in a range of 2 to 30 wt.% to the foam.
Claim 3
Dependent Claim
28 words
A polyisocyanurate foam according to claim 1 wherein said organosilicate having hydroxypolyoxyalkylene group is obtained by reacting a polyoxyalkyleneglycol with a halosilicon compound in a dehydrogen halide reaction.
Claim 4
Dependent Claim
40 words
A polyisocyanurate foam according to claim 1 wherein said organosilicate having hydroxypolyoxyalkylene group is obtained by an ester interchange of a lower alkyl silicate obtained by reacting a lower alcohol with metallic silicon or a halosilicon compound with a polyoxyalkyleneglycol.
Claim 5
Dependent Claim
28 words
A polyisocyanurate foam according to claim 1 wherein an amount of said organosilicate having hydroxypolyoxyalkylene group is in a range of 5 to 20 wt.% to the foam.
Claim 6
Dependent Claim
28 words
A polyisocyanurate foam according to claim 1 wherein an amount of said organosilicate having hydroxypolyoxyalkylene group is in a range of 7 to 15 wt.% to the foam.
Claim 7
Dependent Claim
38 words
A polyisocyanurate foam according to claim 1 wherein said polyoxyalkyleneglycol is a compound having the formula H--OR').sub.m OH wherein R' represents a C 2 to C 4 alkylene group and m represents an integer of 2 to 120.
Claim 8
Dependent Claim
38 words
A polyisocyanurate foam according to claim 1 wherein said polyoxyalkyleneglycol is a compound having the formula H--OR').sub.m OH wherein R' represents a C 2 to C 3 alkylene group and m represents an integer of 4 to 50.
Claim 9
Dependent Claim
38 words
A polyisocyanurate foam according to claim 1 wherein said polyoxyalkyleneglycol is a compound having the formula H--OR').sub.m OH wherein R' represents a C 2 to C 3 alkylene group and m represents an integer of 10 to 40.
Claim 10
Dependent Claim
40 words
A polyisocyanurate foam according to claim 1 wherein said halosilicon compound is a compound having the formula R.sub.n SiX.sub.4-n wherein R represents an organic moiety; n represents 0 or an integer of 1 to 3 and X represents halogen atom.
Claim 11
Dependent Claim
37 words
A polyisocyanurate foam according to claim 9 wherein R represents a lower alkyl group, a lower alkoxyl group or phenyl group; n represents 0 or an integer of 1 to 3 and X represents Cl or Br.
Claim 12
Dependent Claim
15 words
A polyisocyanurate foam according to claim 9 wherein said halosilicon compound is SiCl 4 .
Claim 13
Dependent Claim
46 words
A polyisocyanurate foam according to claim 1 wherein said lower alkyl silicate is a compound having the formula R.sub.n Si(OR").sub.4-n wherein R represents hydrogen atom or an organic moiety; R" represents a lower alkyl group and n represents 0 or an integer of 1 to 3.
Claim 14
Dependent Claim
65 words
A polyisocyanurate foam according to claim 1 wherein said organosilicate having hydroxypolyoxyalkylene group is a compound having the formula R.sub.n Si[(OR').sub.m OH].sub.4-n wherein R represents a lower alkyl group, a lower alkoxyl group or phenyl group; R' represents a C 2 to C 3 alkylene group; m represents an integer of 4 to 50 and n represents 0 or an integer of 1 to 3.
Claim 15
Dependent Claim
56 words
A polyisocyanurate foam according to claim 13 wherein said organosilicate having hydroxypolyoxyalkylene group is a compound having the formula R.sub.n Si[(OR').sub.m OH].sub.4-n wherein R represents a C 1 to C 3 alkyl group; R' represents ethylene group; m represents an integer of 10 to 40 and n represents 0 or an integer of 1 to 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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |