US4259227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane compositions for tire sidewalls and composite articles
Assignee: Bayer Corp
•
Filing: 1979-09-21
•
Granted: 1981-03-31
•
Expires: 1999-09-21
Abstract
Abstract White and colored tire sidewalls are made by fabricating a tire having a concentric groove on at least one sidewall and, after cleaning the groove and coating it with adhesive, filling the groove with a polyurethane composition based on 4,4'-methylenebis(cyclohexyl isocyanate) and one or more polyols, said composition also containing an adduct of an aliphatic diisocyanate with N-(t-butyl)diethanolamine and bis(2,2',6,6'-tetramethyl-4-piperidine) sebacate, then curing the composition at an elevated temperature. Pigmented sidewalls of this invention have high light and weather resistance and an exceptional resistance to contact staining.
Inventors
- 👤 Leo Ojakaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/758; B; B29; B29D; B29D30/00; B29D30/06; B29D30/72; B60; B60C; B60C13/00; B60C13/001; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; B29D2030/728
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
49 words
A composition consisting essentially of a polyurethane made from 4,4'-methylenebis(cyclohexyl isocyanate) and one or more polyols in such proportions that the total amounts of isocyanate and hydroxyl functionalities are about equal, an adduct of 2 moles of N-(t-butyl)diethanolamine with 1 mole of an aliphatic diisocyanate, and bis (2,2'6,6'-tetramethyl-4-piperidine) sebacate.
Claim 2
Dependent Claim
49 words
A composition consisting essentially of a polyurethane made from 4,4'-methylenebis(cyclohexyl isocyanate) and one or more polyols in such proportions that the total amounts of isocyanate and hydroxyl functionalities are about equal, an adduct of 2 moles of N-(t-butyl)diethanolamine with 1 mole of an aliphatic diisocyanate, and bis (2,2'6,6'-tetramethyl-4-piperidine) sebacate.
Claim 3
Dependent Claim
22 words
A composition of claim 1 wherein the aliphatic diisocyanate used to form an adduct with N-(t-butyl)diethanolamine is 4,4'-methylenebis(cyclohexyl isocyanate) or 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate.
Claim 4
Dependent Claim
12 words
A composition of claim 2 wherein the aliphatic diisocyanate is 4,4'-methylenebis(cyclohexyl isocyanate).
Claim 5
Dependent Claim
46 words
A composition of claim 3 wherein the polyurethane is obtained from 4,4'-methylenebis(cyclohexyl isocyanate) and a polyol mixture consisting of poly(ε-caprolactone)glycol, 4,4-butanediol, and trimethylolpropane in which poly(ε-caprolactone) glycol constitutes about 95 weight percent of the polyol mixture, and 1,4-butanediol constitutes a major portion of the remaining polyols.
Claim 6
Dependent Claim
28 words
A composition of claim 4 wherein the approximate weight proportions of the polyurethane components are as follows: 4,4'-methylenebis(cyclohexyl isocyanate) 27.6%, poly(ε-caprolactone) glycol 62.6%, 1,4-butanediol 3.5%, and trimethylolpropane 0.7%.
Claim 7
Dependent Claim
19 words
A composition of claim 4 wherein the number average molecular weight of the poly(ε-caprolactone) glycol is 1,100 to 1,400.
Claim 8
Dependent Claim
17 words
A composition of claim 4 containing a dispersed inorganic pigment in sufficient concentration to provide good hiding.
Claim 9
Dependent Claim
22 words
A composition of claim 7 wherein the proportion of pigment is about 0.5-3 parts per 100 parts by weight of polymer solids.
Claim 10
Dependent Claim
10 words
A composition of claim 1 containing a dispersed organic colorant.
Claim 11
Dependent Claim
42 words
A composition of claim 1 wherein the respective proportions of bis(2,2',6,6'-tetramethyl-4-piperidine) sebacate and of adduct of 2 moles of N-(t-butyl)diethanolamine with 1 mole of an aliphatic diisocyanate are approximately 3 parts and 1 part per 100 parts by weight of the polyurethane.
Claim 12
Dependent Claim
55 words
A white sidewall tire composition consisting essentially of a composition of claim 1 and a white-pigmented epoxy paste containing about 60 weight percent of titanium dioxide, the proportion of the epoxy paste being about 0.4-2.4 parts by weight per 100 parts of polyurethane, while the proportion of bis(2,2',6,6'-tetramethyl-4-piperidine) sebacate is about 3 parts by weight.
Claim 13
Independent Claim
110 words
A method of making an automobile tire having a colored sidewall, said method comprising: (1) fabricating a tire having a concentric groove on at least one of its sidewalls; (2) cleaning the sidewall groove; (3) applying an adhesive to the sidewall groove; (4) applying to the sidewall groove a composition consisting essentially of a polyurethane made from 4,4'-methylenebis(cyclohexyl isocyanate) and one or more polyols in such proportions that the total amounts of isocyanate and hydroxyl functionalities are about equal, an adduct of 2 moles of N-(t-butyl)diethanolamine with 1 mole of an aliphatic diisocyanate, and bis(2,2',6,6'-tetramethyl-4-piperidine) sebacate; said composition containing in addition a pigment or colorant; and (5) heat-curing said composition.
Claim 14
Independent Claim
110 words
A method of making an automobile tire having a colored sidewall, said method comprising: (1) fabricating a tire having a concentric groove on at least one of its sidewalls; (2) cleaning the sidewall groove; (3) applying an adhesive to the sidewall groove; (4) applying to the sidewall groove a composition consisting essentially of a polyurethane made from 4,4'-methylenebis(cyclohexyl isocyanate) and one or more polyols in such proportions that the total amounts of isocyanate and hydroxyl functionalities are about equal, an adduct of 2 moles of N-(t-butyl)diethanolamine with 1 mole of an aliphatic diisocyanate, and bis(2,2',6,6'-tetramethyl-4-piperidine) sebacate; said composition containing in addition a pigment or colorant; and (5) heat-curing said composition.
Claim 15
Dependent Claim
47 words
The method of claim 12 wherein the polyurethane is made from 4,4'-methylenebis(cyclohexyl isocyanate) and a polyol mixture consisting of poly(ε-caprolactone) glycol, 1,4-butanediol, and trimethylolpropane in which poly(ε-caprolactone) glycol consistutes about 95 weight percent of the polyol mixture, and 1,4-butanediol constitutes a major portion of the remaining polyols.
Claim 16
Dependent Claim
24 words
The method of claim 12 wherein the aliphatic diisocyanate which is used to make an adduct with N-(t-butyl)diethanolamine is 4,4'-methylenebis(cyclohexyl isocyanate) or 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate.
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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |