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Patent US4987156A successfully refreshed from Google Patents.
US4987156A
Expired / Lapsed
US
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Shock-absorbing polyurethane foam and production process thereof
Assignee: Honda Motor Co Ltd
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Filing: 1989-06-05
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Granted: 1991-01-22
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Expires: 2009-06-05
Abstract
Abstract A shock-absorbing polyurethane foam is formed of a polyol component and a polyisocyanate component. The polyol component is a mixed polyol having an average hydroxyl number of 130-250 and composed at least of 20-70 parts by weight of a low-molecular polyol having a molecular weight of 300-500 and 80-30 parts by weight of a high-molecular polyol having a molecular weight of 1,500-8,000 per 100 parts by weight of the whole polyol component. The foam further contains 5-150 parts by weight of a plasticizer having a solidification point not higher than -20° C. per 100 parts by weight of the whole polyol component. The foam can be produced by reacting the polyol component and polyisocyanate component in the presence of 5-150 parts by weight of the plasticizer per 100 parts by weight of the polyol component.
Inventors
- 👤 Sigeru Tozune
- 👤 Shizuo Yamazaki
- 👤 Ryuichi Komori
- 👤 Masashi Ishii
- 👤 Yoshio Sakaguchi
- 👤 Tetsuya Oda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:27
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/16; C08G18/18; C08G18/20; C08G18/2045; C08G18/2063; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G18/6677; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K5/0008; C08K5/0016; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0058; C08G2110/0083
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
103 words
A shock-absorbing polyurethane foam comprising a polyol component and a polyisocyanate component, characterized in that the polyol component is a mixed polyol having an average hydroxyl number of 130-250 and composed at least of 20-70 parts by weight of a low-molecular polyol having a molecular weight of 300-500 and 80-30 parts by weight of a high-molecular polyol having a molecular weight of 1,500-8,000 per 100 parts by weight of the whole polyol component; and the foam contains 5-150 parts by weight of a plasticizer having a solidification point not higher than -20° C. per 100 parts by weight of the whole polyol component.
Claim 2
Dependent Claim
103 words
A shock-absorbing polyurethane foam comprising a polyol component and a polyisocyanate component, characterized in that the polyol component is a mixed polyol having an average hydroxyl number of 130-250 and composed at least of 20-70 parts by weight of a low-molecular polyol having a molecular weight of 300-500 and 80-30 parts by weight of a high-molecular polyol having a molecular weight of 1,500-8,000 per 100 parts by weight of the whole polyol component; and the foam contains 5-150 parts by weight of a plasticizer having a solidification point not higher than -20° C. per 100 parts by weight of the whole polyol component.
Claim 3
Dependent Claim
18 words
The foam as claimed in claim 1, wherein the average molecular weight of the high-molecular polyol is 2,000-6,000.
Claim 4
Dependent Claim
36 words
The foam as claimed in claim 1, wherein each of the low-molecular and high-molecular polyols is a polyol obtained by adding at least one alkylene oxide to a compound containing at least two active hydrogen atoms.
Claim 5
Dependent Claim
27 words
The foam as claimed in claim 1, wherein the low-molecular and high-molecular polyols amount in combination to at least 50 parts by weight of the mixed polyol.
Claim 6
Dependent Claim
27 words
The foam as claimed in claim 1, wherein the low-molecular and high-molecular polyols amount in combination to at least 70 parts by weight of the mixed polyol.
Claim 7
Dependent Claim
39 words
The foam as claimed in claim 1, wherein a plasticizer having a solidification point not higher than -50° C. is contained in an amount of 5-50 parts by weight per 100 parts by weight of the whole polyol component.
Claim 8
Dependent Claim
105 words
A process for the production of a shock-absorbing polyurethane foam, characterized in that said process comprises reacting a mixed polyol and a polyisocyanate in the presence of 5-150 parts by weight of a plasticizer having a solidification point not higher than -20° C. per 100 parts by weight of the mixed polyol, said mixed polyol having an average hydroxyl number of 130-250 and composed at least of 20-70 parts by weight of a low-molecular polyol having a molecular weight of 300-500 and 80-30 parts by weight of a high-molecular polyol having a molecular weight of 1,500-8,000 per 100 parts by weight of the mixed polyol.
Claim 9
Dependent Claim
105 words
A process for the production of a shock-absorbing polyurethane foam, characterized in that said process comprises reacting a mixed polyol and a polyisocyanate in the presence of 5-150 parts by weight of a plasticizer having a solidification point not higher than -20° C. per 100 parts by weight of the mixed polyol, said mixed polyol having an average hydroxyl number of 130-250 and composed at least of 20-70 parts by weight of a low-molecular polyol having a molecular weight of 300-500 and 80-30 parts by weight of a high-molecular polyol having a molecular weight of 1,500-8,000 per 100 parts by weight of the mixed polyol.
Claim 10
Dependent Claim
18 words
The process as claimed in claim 7, wherein the average molecular weight of the high-molecular polyol is 2,000-6,000.
Claim 11
Dependent Claim
36 words
The process as claimed in claim 7, wherein each of the low-molecular and high-molecular polyols is a polyol obtained by adding at least one alkylene oxide to a compound containing at least two active hydrogen atoms.
Claim 12
Dependent Claim
27 words
The process as claimed in claim 7, wherein the low-molecular and high-molecular polyols amount in combination to at least 50 parts by weight of the mixed polyol.
Claim 13
Dependent Claim
27 words
The process as claimed in claim 7, wherein the low-molecular and high-molecular polyols amount in combination to at least 70 parts by weight of the mixed polyol.
Claim 14
Dependent Claim
41 words
The process as claimed in claim 7, wherein the reaction is conducted in the presence of 5-50 parts by weight of a plasticizer having a solidification point not higher than -50° C. per 100 parts by weight of the mixed polyol.
Claim 15
Dependent Claim
30 words
The process as claimed in claim 7, wherein the polyisocyanate is a mixture of the 2,4-isomer and 2,6-isomer of tolylene diisocyanate at a weight ratio of from 80:20 to 65:35.
Claim 16
Dependent Claim
21 words
The process as claimed in claim 7, wherein the mixed polyol and polyisocyanate are reacted at an NCO/OH ratio of 0.90-1.15.
Claim 17
Dependent Claim
21 words
The process as claimed in claim 7, wherein the mixed polyol and polyisocyanate are reacted in the presence of calcium carbonate.
Claim 18
Dependent Claim
29 words
The process as claimed in claim 15, wherein calcium carbonate is added in an amount of 1-20 parts by weight per 100 parts by weight of the mixed polyol.
Claim 19
Dependent Claim
34 words
The process as claimed in claim 7, wherein a tertiary amine salt represented by the following formula (a) is used as a reaction catalyst: ##STR2## wherein n is an integer of at least 0.
Claim 20
Dependent Claim
21 words
The process as claimed in claim 17, wherein the mixed polyol and polyisocyanate are reacted in the presence of calcium carbonate.
Claim 21
Dependent Claim
29 words
The process as claimed in claim 18, wherein calcium carbonate is added in an amount of 1-20 parts by weight per 100 parts by weight of the mixed polyol.
Claim 22
Dependent Claim
12 words
The foam as claimed in claim 1 wherein the foam is flexible.
Claim 23
Dependent Claim
14 words
The foam as claimed in claim 20 wherein the foam is an open-cell foam.
Claim 24
Dependent Claim
14 words
The foam as claimed in claim 1 wherein the cell is an open-cell foam.
Claim 25
Dependent Claim
11 words
An automotive cushioning material formed from the foam of claim 1.
References Cited (Backward Citations)
US4565833A
Cited
US4746682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-21 | 1994-07-23 | 1995-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-21 | 1998-07-23 | 1999-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-21 | 2002-07-23 | 2003-01-22 | $7700.00 | Window Closed / Lapsed |