US3931060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam free from internal discoloration
Assignee: Bayer AG
•
Filing: 1974-08-12
•
Granted: 1976-01-06
•
Expires: 1994-08-12
Abstract
Abstract Polyurethane foams which are free from the usual discoloration particularly in the center of a block thereof are prepared from a foamable reaction mixture containing A. a heterocyclic mercapto compound of the formula ##SPC1## In which X = --o--, --s--, --nh--, --n--(c 1 -c 12 )--alkyl, --N--(C 5 -C 6 )--cycloalkyl--, --N--phenyl, --N--(C 7 -C 12 )--aralkyl, --N--(C 7 --C 12 )--alkylaryl-- or --N--CO--(C 1 -C 6 )--alkyl, ##EQU1## ##SPC2## R = H, (C 1 -C 12 )--alkyl, (C 1 -C 12 )--alkoxycarbonyl--, (C 1 -C 12 )--alkoxy and B. a phenol of the general formula ##SPC3## In which R 1 and R 3 may be the same or different and denote C 1 -C 9 --alkyl--, C 5 -C 6 --cycloalkyl--, C 7 -C 9 --alkylaryl--, indanyl or norbornyl groups and R 2 = R 1 or --CH 2 --CH 2 --COO--(C 1 -C 12 )--alkyl.
Inventors
- 👤 Rudiger Schubart
- 👤 Ulrich Nehen
- 👤 Ernst Roos
- 👤 Manfred Dahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/16; C08K5/34; C08K5/35; C08K5/36; C08K5/45; C08K5/46; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
In a process for producing a polyurethane foam which is substantially free from discoloration at the center thereof from a foamable mixture containing an organic polyisocyanate, an organic compound which contains at least 2 active hydrogen atoms, a blowing agent and a catalyst for the reaction between the polyisocyanate and the said organic compound, the improvement which comprises effecting the reaction in the presence of a sufficient amount in effective proportions of a. a heterocyclic mercapto compound of the general formula ##SPC12## in which
Claim 2
Dependent Claim
84 words
In a process for producing a polyurethane foam which is substantially free from discoloration at the center thereof from a foamable mixture containing an organic polyisocyanate, an organic compound which contains at least 2 active hydrogen atoms, a blowing agent and a catalyst for the reaction between the polyisocyanate and the said organic compound, the improvement which comprises effecting the reaction in the presence of a sufficient amount in effective proportions of a. a heterocyclic mercapto compound of the general formula ##SPC12## in which
Claim 3
Dependent Claim
118 words
X = --O--, --S--, --NH--, --N--(C 1 -C 12 )--alkyl, --N--(C 5 -C 6 )--cycloalkyl-----N--phenyl, --N--(C 7 014 C 12 )--aralkyl, --N--(C 7 -C 12 )--alkyl--aryl-- or --N--CO--(C 1 -C 6 )--alkyl, Y = --ch 2 --ch 2 --, --ch=ch--, ##EQU4## ##SPC13## r = h, (c 1 -c 12 )--alkyl, (C 1 -C 12 )--alkoxy--carbonyl--, (C 1 -C 12 )--alkoxy and b. a phenol of the general formula ##SPC14## in which R 1 and R 3 may be the same or different and denote C 1 -C 9 --alkyl--, C 5 -C 6 --cycloalkyl, C 7 -C 9 --alkylaryl--, indanyl-- or norbornyl groups and R 2 =R 1 or --CH 2 --CH 2 --COO--(C 1 -C 12 )--alkyl.
Claim 4
Dependent Claim
118 words
X = --O--, --S--, --NH--, --N--(C 1 -C 12 )--alkyl, --N--(C 5 -C 6 )--cycloalkyl-----N--phenyl, --N--(C 7 014 C 12 )--aralkyl, --N--(C 7 -C 12 )--alkyl--aryl-- or --N--CO--(C 1 -C 6 )--alkyl, Y = --ch 2 --ch 2 --, --ch=ch--, ##EQU4## ##SPC13## r = h, (c 1 -c 12 )--alkyl, (C 1 -C 12 )--alkoxy--carbonyl--, (C 1 -C 12 )--alkoxy and b. a phenol of the general formula ##SPC14## in which R 1 and R 3 may be the same or different and denote C 1 -C 9 --alkyl--, C 5 -C 6 --cycloalkyl, C 7 -C 9 --alkylaryl--, indanyl-- or norbornyl groups and R 2 =R 1 or --CH 2 --CH 2 --COO--(C 1 -C 12 )--alkyl.
Claim 5
Dependent Claim
27 words
The process of claim 1, wherein the foamable reaction mixture contains from about 0.2% to about 2 % by weight of the mixture of (a) and (b).
Claim 6
Dependent Claim
21 words
The process of claim 2, wherein the mixture of (a) and (b) contains from 30 to 70% by weight of (b).
Claim 7
Dependent Claim
207 words
A polyurethane foam, which is substantially free from discoloration at the center thereof, comprising the product of an organic compound which has at least 2 active hydrogen atoms and an organic polyisocyanate reacted in the presence of a blowing agent, a catalyst which promotes reaction of the said organic compound with an organic polyisocyanate and a substance to prevent discoloration at the center of the resulting foam, said substance comprising a sufficient amount in effective proportions of a. a heterocyclic mercapto compound of the general formula ##SPC15## in which X = --o--, --s--, --nh--, --n--(c 1 -c 12 )--alkyl, --N--(C 5 -C 6 )--cycloalkyl--, --N--phenyl, --N--(C 7 -C 12 )--aralkyl--, --N--(C 7 -C 12 )--alkyl--aryl-- or --N--CO--(C 1 -C 6 )--alkyl; Y = --ch 2 --ch 2 --, --ch=ch--, ##EQU5## ##SPC16## r = h, (c 1 -c 12 )--alkyl, (C 1 -C 12 )--alkoxy--carbonyl--, (C 1 -C 12 )--alkoxy--and b. a phenol of the general formula ##SPC17## in which R 1 and R 3 may be the same or different and denote C 1 -C 9 --alkyl, C 5 -C 6 --cycloalkyl--, C 7 -c 9 --alkyl--aryl--, indanyl-- or norbornyl groups and R 2 = R 1 or --CH 2 --CH 2 --COO--(C 1 -C 12 )--alkyl.
Claim 8
Dependent Claim
207 words
A polyurethane foam, which is substantially free from discoloration at the center thereof, comprising the product of an organic compound which has at least 2 active hydrogen atoms and an organic polyisocyanate reacted in the presence of a blowing agent, a catalyst which promotes reaction of the said organic compound with an organic polyisocyanate and a substance to prevent discoloration at the center of the resulting foam, said substance comprising a sufficient amount in effective proportions of a. a heterocyclic mercapto compound of the general formula ##SPC15## in which X = --o--, --s--, --nh--, --n--(c 1 -c 12 )--alkyl, --N--(C 5 -C 6 )--cycloalkyl--, --N--phenyl, --N--(C 7 -C 12 )--aralkyl--, --N--(C 7 -C 12 )--alkyl--aryl-- or --N--CO--(C 1 -C 6 )--alkyl; Y = --ch 2 --ch 2 --, --ch=ch--, ##EQU5## ##SPC16## r = h, (c 1 -c 12 )--alkyl, (C 1 -C 12 )--alkoxy--carbonyl--, (C 1 -C 12 )--alkoxy--and b. a phenol of the general formula ##SPC17## in which R 1 and R 3 may be the same or different and denote C 1 -C 9 --alkyl, C 5 -C 6 --cycloalkyl--, C 7 -c 9 --alkyl--aryl--, indanyl-- or norbornyl groups and R 2 = R 1 or --CH 2 --CH 2 --COO--(C 1 -C 12 )--alkyl.
Claim 9
Independent Claim
163 words
The method of stabilizing a polyurethane foam against discoloration at the center produced during foaming which comprises effecting the foaming reaction in the presence of the sufficient amount in effective proportions of a. a heterocyclic mercapto compound of the general formula ##SPC18## in which X = --o--, --s--, --nh--, --n--(c 1 -c 12 )--alkyl --N--(C 5 -C 6 )--cycloalkyl--, --N--phenyl, --N--(C 7 -C 12 )--aralkyl, --N--(C 7 -C 12 )--alkyl--aryl-- or --N--CO--(C 1 -C 6 )--alkyl, Y = --ch 2 --ch 2 --, --ch=ch--, ##EQU6## ##SPC19## r = h, (c 1 -c 12 )--alkyl, (C 1 -c 12 )--alkoxy--carbonyl--, (C 1 -C 12 )--alkoxy and b. a phenol of the general formula ##SPC20## in which R 1 and R 3 may be the same or different and denote C 1 -C 9 --alkyl--, C 5 -C 6 --cycloalkyl--, C 7 -C 9 --alkylaryl--, indanyl-- or norbornyl groups and R 2 = R 1 or --CH 2 --CH 2 --COO--(C 1 -C 12 )--alkyl.
Claim 10
Independent Claim
163 words
The method of stabilizing a polyurethane foam against discoloration at the center produced during foaming which comprises effecting the foaming reaction in the presence of the sufficient amount in effective proportions of a. a heterocyclic mercapto compound of the general formula ##SPC18## in which X = --o--, --s--, --nh--, --n--(c 1 -c 12 )--alkyl --N--(C 5 -C 6 )--cycloalkyl--, --N--phenyl, --N--(C 7 -C 12 )--aralkyl, --N--(C 7 -C 12 )--alkyl--aryl-- or --N--CO--(C 1 -C 6 )--alkyl, Y = --ch 2 --ch 2 --, --ch=ch--, ##EQU6## ##SPC19## r = h, (c 1 -c 12 )--alkyl, (C 1 -c 12 )--alkoxy--carbonyl--, (C 1 -C 12 )--alkoxy and b. a phenol of the general formula ##SPC20## in which R 1 and R 3 may be the same or different and denote C 1 -C 9 --alkyl--, C 5 -C 6 --cycloalkyl--, C 7 -C 9 --alkylaryl--, indanyl-- or norbornyl groups and R 2 = R 1 or --CH 2 --CH 2 --COO--(C 1 -C 12 )--alkyl.
Claim 11
Dependent Claim
21 words
The process of claim 5, wherein the heterocyclic mercapto compound has the formula ##SPC21## and the phenol has the formula ##SPC22##
Claim 12
Dependent Claim
21 words
The process of claim 5 wherein the heterocyclic mercapto compound has the formula ##SPC23## and the phenol has the formula ##SPC24##
References Cited (Backward Citations)
US3485778A
Cited
US3214397A
Cited
US3446779A
Cited
US3536663A
Cited
US3634315A
Cited
US3635862A
Cited
US3715381A
Cited
US3700750A
Cited
US3703489A
Cited
US3772218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |