US4766172A
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US
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Mold release composition, mixtures containing this mold release composition, a process for the production of molded articles and the molded articles obtained by this process
Assignee: Bayer AG
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Filing: 1987-07-21
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Granted: 1988-08-23
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Expires: 2007-07-21
Abstract
Abstract The present invention is directed to mold release compositions based on a solution which is liquid at room temperature and contains (i) at least one zinc salt of a straight or branched chain, saturated or unsaturated aliphatic carboxylic acid containing 8 to 24 carbon atoms in (ii) at least one organic compound containing tertiary nitrogen atoms which is liquid at room temperature, the zinc salt being present in a quantity of about 10 to 75% by weight, based on the total weight of the composition, characterized in that component (ii) is based on at least one compound corresponding to the formula ##STR1## wherein R', R", R"' and R iv , which may be identical or different, denote alkyl group containing 1 to 4 carbon atoms or any two of the groups R' and R" or R"' and R iv may combine with the nitrogen atom to form a 6-membered heterocyclic ring optionally containing an oxygen atom or an alkyl substituted nitrogen atom as hetero atom and having a total of 4 or 5 carbon atoms, R denotes hydrogen or a group of the formula --(CH.sub.2).sub.o --NH.sub.2 and m, n and o denote identical or different integers with values from 2 to 6. The present invention is also directed to a mixture suitable for use as a reactant for polyisocyanates containing isocyanate-reactive groups and the mold release composition described above. Finally, the present invention is directed to a process for the production of a elastomeric molded article having a nonporous surface by reacting a polyisocyanate with the previously described mixture containing isocyanate-reactive groups and to the molded articles produced by the process.
Inventors
- 👤 Christian Weber
- 👤 Peter Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:18
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/04; C08K5/09; C08K5/098; C08K5/17
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
177 words
A mold release composition comprising a solution which is liquid at room temperature of (i) about 10 to 75%, based on the weight of the composition of at least one zinc salt of a straight or branched chain, saturated or unsaturated aliphatic carboxylic acid having 8 to 24 carbon atoms in (ii) at least one organic compound containing tertiary nitrogen atoms which is liquid at room temperature and comprises at least one compound corresponding to the formula ##STR4## wherein R', R", R"' and R iv may be identical or different and represent alkyl groups with 1 to 4 carbon atoms or two of the groups, R' and R" or R"' and R iv , may combine with the nitrogen atom to form a 6-membered heterocyclic ring optionally containing an oxygen atom or an alkyl-substituted nitrogen atom as heteroatoms and having a total of 4 or 5 carbon atoms, R denotes hydrogen or a group corresponding to the formula --(CH.sub.2).sub.o --NH.sub.2 and m, n and o stand for identical or different integers having values from 2 to 6.
Claim 2
Dependent Claim
177 words
A mold release composition comprising a solution which is liquid at room temperature of (i) about 10 to 75%, based on the weight of the composition of at least one zinc salt of a straight or branched chain, saturated or unsaturated aliphatic carboxylic acid having 8 to 24 carbon atoms in (ii) at least one organic compound containing tertiary nitrogen atoms which is liquid at room temperature and comprises at least one compound corresponding to the formula ##STR4## wherein R', R", R"' and R iv may be identical or different and represent alkyl groups with 1 to 4 carbon atoms or two of the groups, R' and R" or R"' and R iv , may combine with the nitrogen atom to form a 6-membered heterocyclic ring optionally containing an oxygen atom or an alkyl-substituted nitrogen atom as heteroatoms and having a total of 4 or 5 carbon atoms, R denotes hydrogen or a group corresponding to the formula --(CH.sub.2).sub.o --NH.sub.2 and m, n and o stand for identical or different integers having values from 2 to 6.
Claim 3
Dependent Claim
55 words
The mold release composition of claim 1 wherein component (i) comprises zinc stearate and component (ii) comprises a compound corresponding to the formula set forth in claim 1 wherein R', R", R"' and R iv are each methyl groups, R is hydrogen and m and n are identical and have the value 2 or 3.
Claim 4
Dependent Claim
16 words
The mold release composition of claim 2 wherein component (ii) additionally comprises an amine-initiated polyether polyol.
Claim 5
Dependent Claim
266 words
A mixture suitable as a reactant for an organic polyisocyanate which comprises (a) at least one organic compound having a molecular weight of 400 to about 12,000 and containing at least two isocyanate-reactive groups, (b) about 5 to 50% by weight, based on the weight of component (a), of at least one organic compound having a molecular weight of 62 to 399 and containing two isocyanate-reactive groups and (c) a mold release composition comprising a solution which is liquid at room temperature of (i) about 10 to 75%, based on the weight of component (c), of at least one zinc salt of a straight or branched chain, saturated or unsaturated aliphatic carboxylic acid having 8 to 24 carbon atoms in (ii) at least one organic compound containing tertiary nitrogen atoms which is liquid at room temperature and comprises at least one compound corresponding to the formula ##STR5## wherein R', R", R"' and R iv may be identical or different and represent alkyl groups with 1 to 4 carbon atoms or two of the groups, R' and R" or R"' and R iv , may combine with the nitrogen atom to form a 6-membered heterocyclic ring optionally containing an oxygen atom or an alkyl-substituted nitrogen atom as heteroatoms and having a total of 4 or 5 carbon atoms, R denotes hydrogen or a group corresponding to the formula --(CH.sub.2).sub.o --NH.sub.2 and m, n and o stand for identical or different integers having values from 2 to 6, said mixture containing about 0.5 to 10 parts by weight of said zinc salt per 100 parts of component (a).
Claim 6
Dependent Claim
266 words
A mixture suitable as a reactant for an organic polyisocyanate which comprises (a) at least one organic compound having a molecular weight of 400 to about 12,000 and containing at least two isocyanate-reactive groups, (b) about 5 to 50% by weight, based on the weight of component (a), of at least one organic compound having a molecular weight of 62 to 399 and containing two isocyanate-reactive groups and (c) a mold release composition comprising a solution which is liquid at room temperature of (i) about 10 to 75%, based on the weight of component (c), of at least one zinc salt of a straight or branched chain, saturated or unsaturated aliphatic carboxylic acid having 8 to 24 carbon atoms in (ii) at least one organic compound containing tertiary nitrogen atoms which is liquid at room temperature and comprises at least one compound corresponding to the formula ##STR5## wherein R', R", R"' and R iv may be identical or different and represent alkyl groups with 1 to 4 carbon atoms or two of the groups, R' and R" or R"' and R iv , may combine with the nitrogen atom to form a 6-membered heterocyclic ring optionally containing an oxygen atom or an alkyl-substituted nitrogen atom as heteroatoms and having a total of 4 or 5 carbon atoms, R denotes hydrogen or a group corresponding to the formula --(CH.sub.2).sub.o --NH.sub.2 and m, n and o stand for identical or different integers having values from 2 to 6, said mixture containing about 0.5 to 10 parts by weight of said zinc salt per 100 parts of component (a).
Claim 7
Dependent Claim
112 words
The mixture of claim 4 wherein component (a) comprises at least one polyether having a molecular weight of about 1800 to 12,000 and a total of 2 or 3 isocyanate-reactive groups comprising a member selected from the group consisting of primary alcoholic hydroxyl groups, secondary alcoholic hydroxyl groups and primary amino groups, component (b) comprises 1-methyl-3,5-diethyl-2,4-diaminobenzene with up to 35% by weight of 1-methyl-3,5-diethyl-2,6-diaminobenzene, component (c)(i) comprises zinc stearate and component (c)(ii) comprises a compound according to the formula set forth in claim 4 wherein R', R", R"' and R iv are each methyl groups, R is hydrogen and m and n are identical and have the value of 2 or 3.
Claim 8
Dependent Claim
14 words
The mixture of claim 5 wherein component (c)(ii) additionally comprises an amine-initiated polyether polyol.
Claim 9
Dependent Claim
58 words
A process for the production of elastomeric molded articles of polyurethane or polyurea elastomers having a compact surface layer which comprises reacting inside closed molds a reaction mixture which comprises (A) a polyisocyanate component comprising at least one di- or polyisocyanate in which all of the isocyanate groups are aromatically bound and (B) the mixture of claim 4.
Claim 10
Dependent Claim
32 words
The process of claim 7, wherein component (A) comprises a polyisocyanate or polyisocyanate mixture of the diphenylmethane series which is liquid at room temperature and optionally contains urethane, carbodiimide and/or uretoneimine groups.
Claim 11
Dependent Claim
14 words
The process of claim 7 wherein component (B) additionally comprises an amine-initiated polyether polyol.
Claim 12
Dependent Claim
9 words
A molded article obtained in accordance with claim 7.
Claim 13
Dependent Claim
9 words
A molded article obtained in accordance with claim 6.
Claim 14
Dependent Claim
9 words
A molded article obtained in accordance with claim 9.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |