EP0513964A2
Expired / Lapsed
EP
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(Polyurethane) Elastomer and process for producing it (with a specific releasing agent)
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1992-02-13
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Granted: —
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Expires: 2012-02-13
Abstract
Abstract An elastomer is molded by a reaction injection molding of polyurethane resins, polyurea resins, polyurethane/urea resins and polyurea/amide resins in the presence of an internal release agent which is a polyester condensate of a saturated or unsaturated fatty acid having a hydroxy group produced by transesterification or a molecular end-aminated or iminated polyester condensate. The elastomer has a good mold releasing property and a good coating property.
Inventors
- 👤 Yuji Uchida
- 👤 Yoshio Yoshida
- 👤 Toshikazu Kaneda
- 👤 Toshiaki Moriya
- 👤 Tsutomu Kumazawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 09:59
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/02; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4283; B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C45/00; C08G18/4009; C08G18/4018; C08G18/46; C08G18/4615; C08G18/4623; C08L67/00; C08L67/02; B29K; B29K2075/00; C08G2120/00; C08G2125/00; C08G2130/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
An elastomer molded by a reaction injection molding of a member selected from the group consisting of polyurethane resins, polyurea resins, polyurethane/urea resins and polyurea/amide resins using a composition containing a member selected from the group consisting of a polyester condensate of a saturated fatty acid having a hydroxy group produced by transesterification, a polyester condensate of an unsaturated fatty acid having a hydroxy group produced by transesterification, and a polyester condensate having an amino and/or imino group at the end of the molecule derived from the above-mentioned polyester condensates as an internal release agent.
Claim 2
Dependent Claim
169 words
An elastomer according to claim 1 in which the polyester condensate of a saturated fatty acid having a hydroxy group is selected from the group consisting of a polyester condensate of the formula, where m and n are integers and the total of m and n is 13 - 15, r and s are integers of 0 - 7 and the total of r and s is 1 - 7, j and k are integers and the total of j and k is 1 - 25, and R₁ is selected from the group consisting of hydrogen and C₁ - C₄ alkyl, and a polyester condensate of the formula, where m and n are integers and the total of m and n is 13 - 15, t is an integer of 1 - 4, j and k are integers and the total of j and k is 1 - 25, R₂ and R₃ are similar or dissimilar and selected from the group consisting of hydrogen and C₁ - C₄ alkyl.
Claim 3
Dependent Claim
142 words
An elastomer according to claim 2 in which the polyester condensate of a saturated fatty acid having a hydroxy group is a condensate of a 12-hydroxystearic acid ester selected from the group consisting of a condensate of the formula, where r and s are integers of 0 - 7 and the total of r and s is 1 - 7, j and k are integers and the total of j and k is 1 - 25, and R₁ is selected from the group consisting of hydrogen and C₁ - C₄ alkyl, and a condensate of the formula, where t is an integer of 1 - 4, j and k are integers and the total of j and k is 1 - 25, R₂ and R₃ are similar or dissimilar and selected from the group consisting of hydrogen and C₁ - C₄ alkyl.
Claim 4
Dependent Claim
161 words
An elastomer according to claim 2 in which the polyester condensate of a saturated fatty acid having a hydroxy group has an average molecular weight of 1000 - 8000 and a hydroxyl value of 5 - 70 and is prepared by transesterification of a saturated aliphatic ester of the formula, where R is C₁ - C₄ alkyl, m and n are integers and the total of m and n is 13 - 15, with a member selected from the group consisting of an alkane-diol of the formula, where r and s are integers of 0 - 7 and the total of r and s is 1 - 7, and R₁ is a member selected from the group consisting of hydrogen and C₁ - C₄ alkyl, and a diol of the formula, where t is an integer of 1 - 4 and R₂ and R₃ are similar or dissimilar and selected from the group consisting of hydrogen and C₁ - C₄ alkyl.
Claim 5
Dependent Claim
142 words
An elastomer according to claim 1 in which the polyester condensate of an unsaturated fatty acid having a hydroxy group is a condensate of a ricinoleic acid ester selected from the group consisting of a condensate of the formula, where r and s are integers of 0 - 7 and the total of r and s is 1 - 7, j and k are integers and the total of j and k is 1 - 25, and R₁ is selected from the group consisting of hydrogen and C₁ - C₄ alkyl, and a condensate of the formula, where t is an integer of 1 - 4, j and k are integers and the total of j and k is 1 - 25, R₂ and R₃ are similar or dissimilar and selected from the group consisting of hydrogen and C₁ - C₄ alkyl.
Claim 6
Dependent Claim
145 words
An elastomer according to claim 5 in which the polyester condensate of an unsaturated fatty acid having a hydroxy group has an average molecular weight of 1000 - 8000 and a hydroxyl value of 5 - 70 and is prepared by transesterification of an unsaturated aliphatic ester of the formula, where R is C₁ - C₄ alkyl, with a member selected from the group consisting of an alkanediol of the formula, where r and s are integers of 0 - 7 and the total of r and s is 1 - 7, and R₁ is a member selected from the group consisting of hydrogen and C₁ - C₄ alkyl, and a diol of the formula, where t is an integer of 1 - 4 and R₂ and R₃ are similar or dissimilar and selected from the group consisting of hydrogen and C₁ - C₄ alkyl.
Claim 7
Dependent Claim
96 words
An elastomer according to claim 1 in which the polyester condensate having an amino and/or imino group at the end of the molecule is a product produced by reacting the composition containing a member selected from the group consisting of a polyester condensate of a saturated fatty acid having a hydroxy group produced by transesterification and a polyester condensate of an unsaturated fatty acid having a hydroxy group with a diisocyanate to produce a prepolymer and reacting the resulting prepolymer with a member selected from the group consisting of aromatic polyamines, polyether polyamines, and polyether polyimines.
Claim 8
Dependent Claim
137 words
An elastomer according to claim 7 in which the aromatic amine is a member selected from the group consisting of compounds of the formulas, where R₁, R₂, R₃, R₄ and R₅ are independently selected from the group consisting of hydrogen and alkyl having 1 - 10 carbon atoms; when at least one of R₁, R₂ and R₃ is alkyl in formula (11), the alkyl is at the ortho position with respect to at least one amino group; when at least one of R₁ and R₂ is alkyl in formula (12), the alkyl is at the ortho position with respect to at least one amino group; and R₆, R₇, R₈ and R₉ are independently selected from the group consisting of hydrogen and alkyl having 1 - 10 carbon atoms and n is an integer of 1 - 10.
Claim 9
Dependent Claim
27 words
An elastomer according to claim 7 in which the polyether polyamine is prepared by substituting the molecular ends of a polyol with a primary or secondary amino.
Claim 10
Dependent Claim
25 words
An elastomer according to claim 7 in which the polyether polyimine is prepared by substituting the molecular ends of a polyol with an imino group.
Claim 11
Dependent Claim
99 words
A process for producing an elastomer by a reaction injection molding which comprises reacting, in a closed mold, a mixture having an isocyanate index of 70 - 130 comprising (a) an organic polyisocyanate, (b) a polyol having at least two active hydrogen groups and a molecular weight of 800 - 12000 or a polyether polyamine or polyether polyimine having such a structure that the ends of said polyol are substituted with a member selected from the group consisting of primary amino, secondary amino, aromatic primary amino, and imino, and (d) an internal release agent as recited in claim 1.
Claim 12
Dependent Claim
39 words
A process according to claim 11 in which there is used (c) a chain extending agent containing 5 - 80 parts by weight of an aromatic diamine per 100 parts by weight of the total of the (b) component.
Claim 13
Dependent Claim
51 words
A process according to claim 11 or claim 12 in which the polyester condensate in the internal release agent recited in claim 1 as the (d) component is used in an amount of 0.5 - 30 parts by weight per 100 parts by weight of the total of the (b) component.
References Cited (Backward Citations)
No citation records indexed.
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