US4299924A
Expired / Lapsed
US
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Polyisocyanurate resin and process for making the same
Assignee: Sanyo Chemical Industries Ltd
•
Filing: 1980-07-17
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Granted: 1981-11-10
•
Expires: 2000-07-17
Abstract
Abstract High-density polyisocyanurate resins having improved rigidity, heat resistance and/or impact resistance can be obtained by reacting a polyisocyanate with a polymer polyol derived from a polyol having a molecular weight of at least 4500, and optionally a crosslinker, in the presence of trimerization catalyst, using isocyanate index of 200-5000.
Inventors
- 👤 Takao Nomura
- 👤 Yoshio Taguchi
- 👤 Kozaburo Nagata
- 👤 Takuji Isaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/08; C08G18/09; C08G18/092; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/0066; C08G2110/0083; C08G2120/00
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
99 words
A process for producing a cellular or noncellular polyisocyanurate resin, which comprises reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound with or without a cross-linker, in the presence of trimerization catalyst, in the presence of or in the absence of a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having a molecular weight of at least 4500 and an ethylenically unsaturated monomer, (2) isocyanate index is 200-5000, and (3) the resin has a density of at least 0.5 g/cm 3 .
Claim 2
Dependent Claim
99 words
A process for producing a cellular or noncellular polyisocyanurate resin, which comprises reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound with or without a cross-linker, in the presence of trimerization catalyst, in the presence of or in the absence of a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having a molecular weight of at least 4500 and an ethylenically unsaturated monomer, (2) isocyanate index is 200-5000, and (3) the resin has a density of at least 0.5 g/cm 3 .
Claim 3
Dependent Claim
25 words
The process of claim 1, wherein a noncellular polyisocyanurate resin is produced by carrying out the reaction substantially in the absence of the blowing agent.
Claim 4
Dependent Claim
32 words
The process of claim 1, wherein a cellular polyisocyanurate resin is produced by carrying out the reaction in the presence of water, a halogen-substituted aliphatic hydrocarbon blowing agent, or a combination thereof.
Claim 5
Dependent Claim
59 words
The process of claim 3, wherein the reaction is carried out in the presence of at most 5×x% of the halogene-substituted aliphatic hydrocarbon blowing agent and at most 1×y% of water, based on the total weight of said polyisocyanate, said polyhydroxyl compound and the crosslinker, wherein x and y are optional numbers of 0-1 which satisfy the equation: x+y=1.
Claim 6
Dependent Claim
11 words
The process of claim 1, wherein the isocyanate index is 500-5000.
Claim 7
Dependent Claim
21 words
The process of claim 1 or 5, wherein equivalent ratio of (said polyisocyanate+the crosslinker): said polyhydroxyl compound is at least 15:1.
Claim 8
Dependent Claim
21 words
The process of claim 1 or 5, wherein equivalent ratio of (said polyisocyanate+the crosslinker): said polyhydroxyl compound is at least 20:1.
Claim 9
Dependent Claim
20 words
The process of claim 1, wherein equivalent ratio of (said polyisocyanate+the crosslinker): said polyhydroxyl compound is between 15:1 and 25:1.
Claim 10
Dependent Claim
20 words
The process of claim 1, wherein equivalent ratio of said polyisocyanate: the crosslinker is at least 84: at most 16.
Claim 11
Dependent Claim
13 words
The process of claim 1, wherein said high-molecular weight polyol is a polyetherpolyol.
Claim 12
Dependent Claim
17 words
The process of claim 1, wherein said high-molecular weight polyol has a primary OH content of 10-80%.
Claim 13
Dependent Claim
23 words
The process of claim 1, wherein said high-molecular weight polyol is a polyether polyol having a terminal oxyethylene content of 5-50% by weight.
Claim 14
Dependent Claim
14 words
The process of claim 1, wherein the crosslinker has a equivalent weight of 30-140.
Claim 15
Dependent Claim
20 words
The process of claim 1, wherein the crosslinker is at least one selected from low-molecular weight polyols, polyamines and aminoalcohols.
Claim 16
Dependent Claim
30 words
The process of claim 1, wherein the polymer polyol is used in an amount of 70-90% by weight based on the total weight of said polyhydroxyl compound and the crosslinker.
Claim 17
Dependent Claim
17 words
The process of claim 1, wherein a polyisocyanurate resin molded article is formed by reaction injection molding.
Claim 18
Dependent Claim
14 words
A high-density polyisocyanurate resin, which has been obtained by the process of claim 1.
Claim 19
Dependent Claim
16 words
A high-density polyisocyanurate resin molded article, which has been obtained by the process of claim 16.
Claim 20
Dependent Claim
99 words
A high-density polyisocyanurate resin having improved rigidity, heat resistance and impact resistance, which has been obtained by reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound, in the presence of trimerization catalyst in the presence of or in the absence of a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having a molecular weight of at least 4500 and an ethylenically unsaturated monomer, (2) isocyanate index is 1500-5000, and (3) the resin has a density of at least 0.5 g/cm 3 .
Claim 21
Dependent Claim
99 words
A high-density polyisocyanurate resin having improved rigidity, heat resistance and impact resistance, which has been obtained by reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound, in the presence of trimerization catalyst in the presence of or in the absence of a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having a molecular weight of at least 4500 and an ethylenically unsaturated monomer, (2) isocyanate index is 1500-5000, and (3) the resin has a density of at least 0.5 g/cm 3 .
Claim 22
Dependent Claim
39 words
The resin of claim 19, which has a flexural modulus of at least 8000 Kg/cm 2 , a heat distortion temperature of at least 100° C. and an unnoched Izod impact strength of at least 8 Kg.cm/cm 2 .
Claim 23
Dependent Claim
95 words
A high-density polyisocyanurate resin having an improved heat resistance and rigidity, which has been obtained by reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound and a crosslinker, in the presence of a trimerization catalyst with or without a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having an equivalent weight of 500-3000 and an ethylenically unsaturated monomer, (2) isocyanate index is 500-5000, and (3) equivalent ratio of (said polyisocyanate+the crosslinker): said polyhydroxyl compound is at least 20:1.
Claim 24
Dependent Claim
95 words
A high-density polyisocyanurate resin having an improved heat resistance and rigidity, which has been obtained by reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound and a crosslinker, in the presence of a trimerization catalyst with or without a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having an equivalent weight of 500-3000 and an ethylenically unsaturated monomer, (2) isocyanate index is 500-5000, and (3) equivalent ratio of (said polyisocyanate+the crosslinker): said polyhydroxyl compound is at least 20:1.
Claim 25
Dependent Claim
27 words
The resin of claim 21, which has a heat distortion temperature of at least 120° C. and a flexural modulus of at least 10000 Kg/cm 2 .
Claim 26
Dependent Claim
95 words
A high-density polyisocyanurate resin having an improved impact resistance, which has been obtained by reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound and a crosslinker, in the presence of a trimerization catalyst with or without a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having an equivalent weight of 500-3000 and an ethylenically unsaturated monomer (2) isocyanate index is at least 200, and (3) equivalent ratio of (said polyisocyanate+the crosslinker): said polyhydroxyl compound is at most 20:1.
Claim 27
Dependent Claim
95 words
A high-density polyisocyanurate resin having an improved impact resistance, which has been obtained by reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound and a crosslinker, in the presence of a trimerization catalyst with or without a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having an equivalent weight of 500-3000 and an ethylenically unsaturated monomer (2) isocyanate index is at least 200, and (3) equivalent ratio of (said polyisocyanate+the crosslinker): said polyhydroxyl compound is at most 20:1.
Claim 28
Dependent Claim
18 words
The resin of claim 23, which has unnoched Izod impact resistance of at least 10 Kg.cm/cm 2 .
Claim 29
Dependent Claim
104 words
A high-density polyisocyanurate resin having an improved rigidity, which has been obtained by reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound and a crosslinker, in the presence of a trimerization catalyst with or without a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having an equivalent of 500-3000 and an ethylenically unsaturated monomer, (2) isocyanate index is 200-500, (3) equivalent ratio of (said polyisocyanate+the crosslinker): said polyhydroxyl compound is at least 20:1, and (4) the resin has a density of at least 0.5 g/cm 3 .
Claim 30
Dependent Claim
104 words
A high-density polyisocyanurate resin having an improved rigidity, which has been obtained by reacting an organic polyisocyanate with at least one high-molecular weight polyhydroxyl compound and a crosslinker, in the presence of a trimerization catalyst with or without a blowing agent, wherein (1) at least a part of said polyhydroxyl compound is a polymer polyol derived from a high-molecular weight polyol having an equivalent of 500-3000 and an ethylenically unsaturated monomer, (2) isocyanate index is 200-500, (3) equivalent ratio of (said polyisocyanate+the crosslinker): said polyhydroxyl compound is at least 20:1, and (4) the resin has a density of at least 0.5 g/cm 3 .
Claim 31
Dependent Claim
16 words
The resin of claim 25, which has flexural modulus of at least 10000 Kg/cm 2 .
Claim 32
Dependent Claim
36 words
The resin of claim 26, wherein said polyisocyanate is a 1:1 mixture (free NCO content: 26%) of a carbodiimide--modified diphenyl--methane-4,4'-diisocyanate (MDI) with a prepolymer prepared from 745 parts of MDI and 100 parts of triethylene glycol.
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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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |