Patent US5114980A successfully refreshed from Google Patents.
US5114980A
Expired / Lapsed
US
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Polyurethane integral skin foam of low ozone depletion potential
Assignee: Industrial Technology Research Institute
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Filing: 1991-05-20
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Granted: 1992-05-19
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Expires: 2011-05-20
Abstract
Abstract A process for preparing polyurethane integral skin foam with low ozone depletion potential, which comprises mixing 100 pph of a polyether polyol, 5-50 pph of a chain extender, 0.1-2.0 pph of a surfactant, 0.01-0.20 pph of an amine and 0.01-0.20 pph of an organotin catalyst, 0-3.0 pph of a nucleating agent and 1.0-30 pph of a blowing agent comprising 50 to 100 weight percent of HCFC-123 and 50 to 0 weight percent of HCFC-141b to form a polyol mixture; blending said polyol mixture with isocyanate having an ISO index=0.95 to 1.10 and reacting said blend at a temperature from 0 DEG -70 DEG C. in a mold at a temperature of from 10 DEG to 90 DEG C. for a molding time of 1 to 9 minutes to form a polyurethane integral skin foam, and the product of said process.
Inventors
- 👤 Lucky J. Lii
- 👤 Shi-Shiow Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/34; B; B29; B29C; B29C44/00; C08J9/12; C08J9/14; C08J9/143; C08J9/144; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S264/00; Y10S264/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
A process for preparing polyurethane integral skin foam with low ozone depletion potential, which comprises mixing 100 pph of a polyether polyol, 5-50 pph of a chain extender, 0.1-2.0 pph of a surfactant, 0.01-0.20 pph of an amine and 0.01-0.20 pph of an organotin catalyst, 0-3.0 pph of a nucleating agent and 1.0-30 pph of a blowing agent comprising 50 to 100 weight percent of HCFC-123 (CHCl 2 CF 3 ) and 50 to 0 weight percent of HCFC-141b (CH 3 CFCL 2 ) to form a polyol mixture; blending said polyol mixture with isocyanate having an ISO index =0.95 to 1.10 and reacting said blend at a temperature from 0° -70° C. in a mold at a temperature of from 10 to 90° C. for a molding time of 1 to 9 minutes to form a polyurethane integral skin foam.
Claim 2
Dependent Claim
141 words
A process for preparing polyurethane integral skin foam with low ozone depletion potential, which comprises mixing 100 pph of a polyether polyol, 5-50 pph of a chain extender, 0.1-2.0 pph of a surfactant, 0.01-0.20 pph of an amine and 0.01-0.20 pph of an organotin catalyst, 0-3.0 pph of a nucleating agent and 1.0-30 pph of a blowing agent comprising 50 to 100 weight percent of HCFC-123 (CHCl 2 CF 3 ) and 50 to 0 weight percent of HCFC-141b (CH 3 CFCL 2 ) to form a polyol mixture; blending said polyol mixture with isocyanate having an ISO index =0.95 to 1.10 and reacting said blend at a temperature from 0° -70° C. in a mold at a temperature of from 10 to 90° C. for a molding time of 1 to 9 minutes to form a polyurethane integral skin foam.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the chain extender has a general formula as HO--R--OH, where R=C 2 -C 4 .
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein the chain extender is ethylene glycol, propylene glycol, 1,4 butylene glycol, or diethylene glycol.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the surfactant is a silicone glycol.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein the amine catalyst is dimethylethanol amine, triethylene amine, or triethylene diamine.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein the organotin catalyst is dibutyl tin dilaurate or stannous octoate.
Claim 8
Dependent Claim
18 words
The process of claim 1 wherein the nucleating agent is SiO 2 powder with a particle size ≦30mμ.
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein the isocyanate is a liquid comprising diisocyanate diphenyl methane.
Claim 10
Dependent Claim
16 words
The process of claim 1 wherein the mold temperature is in the range of 40°-60° C.
Claim 11
Dependent Claim
16 words
The process of claim 1 wherein the material temperature is in the range of 20°-50° C.
Claim 12
Dependent Claim
16 words
The process of claim 1 wherein the molding time is in the range of 3-7 minutes.
References Cited (Backward Citations)
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US4150206A
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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) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |