US5444117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating compositions containing polyisocyanates and aldimines which have improved storage stability
Assignee: Bayer Corp
•
Filing: 1994-02-09
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Granted: 1995-08-22
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Expires: 2014-02-09
Abstract
Abstract The present invention relates to a coating composition having an improved pot life without a corresponding increase in dry time when cured under ambient conditions which contains a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde corresponding to the formula: O=CHCH(R1)(R2) wherein R1 and R2 may be the same or different and represent optionally substituted hydrocarbon radicals, or R1 and R2 together with the beta -carbon atom form a cycloaliphatic or heterocyclic ring and c) 0.1 to 15 weight percent, based on the total weight of the coating composition, of a water-adsorbing zeolite, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.5:1 to 20:1.
Inventors
- 👤 Robert A. Wade
- 👤 Terrell D. Wayt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:51
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/02; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/088; C08G18/0885; C08G18/28; C08G18/30; C08G18/32; C08G18/3225; C08G18/3253; C08G18/3256; C08K; C08K3/00; C08K3/34; C08K5/00; C08K5/16
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
133 words
A coating composition which has an improved pot life without a corresponding increase in dry time when cured under ambient conditions comprising a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde corresponding to the formula: O═CHCH(R.sub.1)(R.sub.2) wherein R 1 and R 2 may be the same or different and represent optionally substituted hydrocarbon radicals, or R 1 and R 2 together with the β-carbon atom form a cycloaliphatic or heterocyclic ring and c) 0.1 to 15 weight percent, based on the total weight of the coating composition, of a water-adsorbing zeolite, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.5:1 to 20:1.
Claim 2
Dependent Claim
133 words
A coating composition which has an improved pot life without a corresponding increase in dry time when cured under ambient conditions comprising a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde corresponding to the formula: O═CHCH(R.sub.1)(R.sub.2) wherein R 1 and R 2 may be the same or different and represent optionally substituted hydrocarbon radicals, or R 1 and R 2 together with the β-carbon atom form a cycloaliphatic or heterocyclic ring and c) 0.1 to 15 weight percent, based on the total weight of the coating composition, of a water-adsorbing zeolite, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.5:1 to 20:1.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said polyisocyanate is a polyisocyanate adduct.
Claim 4
Dependent Claim
24 words
The composition of claim 1 wherein said polyisocyanate is a polyisocyanate adduct containing monoisocyanurate and monoallophanate groups in a ratio of 10:1 to 1:10.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein R 1 and R 2 are hydrocarbon radicals containing 1 to 6 carbon atoms.
Claim 6
Dependent Claim
10 words
The composition of claim 4 wherein said diamine comprises bis-(4-aminocyclohexyl)-methane.
Claim 7
Dependent Claim
17 words
The composition of claim 1 wherein said zeolite has an average pore diameter of less than 10Å.
Claim 8
Dependent Claim
120 words
A coating composition which has an improved pot life without a corresponding increase in dry time when cured under ambient conditions comprising a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde corresponding to the formula: O=CHCH(R.sub.1)(R.sub.2) wherein R 1 and R 2 may be the same or different and represent hydrocarbon radicals containing 1 to 6 carbon atoms and c) 0.5 to 10 weight percent, based on the total weight of the coating composition, of a water-adsorbing zeolite, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.5:1 to 20:1.
Claim 9
Dependent Claim
120 words
A coating composition which has an improved pot life without a corresponding increase in dry time when cured under ambient conditions comprising a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde corresponding to the formula: O=CHCH(R.sub.1)(R.sub.2) wherein R 1 and R 2 may be the same or different and represent hydrocarbon radicals containing 1 to 6 carbon atoms and c) 0.5 to 10 weight percent, based on the total weight of the coating composition, of a water-adsorbing zeolite, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.5:1 to 20:1.
Claim 10
Dependent Claim
12 words
The composition of claim 7 wherein said polyisocyanate is a polyisocyanate adduct.
Claim 11
Dependent Claim
24 words
The composition of claim 7 wherein said polyisocyanate is a polyisocyanate adduct containing monoisocyanurate and monoallophanate groups in a ratio of 10:1 to 1:10.
Claim 12
Dependent Claim
20 words
The composition of claim 7 wherein R 1 and R 2 are hydrocarbon radicals containing 1 to 6 carbon atoms.
Claim 13
Dependent Claim
10 words
The composition of claim 10 wherein said diamine comprises bis-(4-aminocyclohexyl)-methane.
Claim 14
Dependent Claim
37 words
The composition of claim 7 wherein the proportions of components a) and b) are calculated to provide an equivalent ratio of isocyanate groups of component a) to isocyanate-reactive groups of component b) of about 0.8:1 to 3:1.
Claim 15
Dependent Claim
141 words
A coating composition which has an improved pot life without a corresponding increase in dry time when cured under ambient conditions comprising a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde corresponding to the formula: O═CHCH(R.sub.1)(R.sub.2) wherein R 1 and R 2 may be the same or different and represent optionally substituted hydrocarbon radicals, or R 1 and R 2 together with the β-carbon atom form a cycloaliphatic or heterocyclic ring and c) 0.5 to 10 weight percent, based on the total weight of the coating composition, of a water-adsorbing zeolite having an pore diameter of less than 10Å, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.8:1 to 3:1.
Claim 16
Dependent Claim
141 words
A coating composition which has an improved pot life without a corresponding increase in dry time when cured under ambient conditions comprising a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde corresponding to the formula: O═CHCH(R.sub.1)(R.sub.2) wherein R 1 and R 2 may be the same or different and represent optionally substituted hydrocarbon radicals, or R 1 and R 2 together with the β-carbon atom form a cycloaliphatic or heterocyclic ring and c) 0.5 to 10 weight percent, based on the total weight of the coating composition, of a water-adsorbing zeolite having an pore diameter of less than 10Å, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.8:1 to 3:1.
Claim 17
Dependent Claim
12 words
The composition of claim 13 wherein said polyisocyanate is a polyisocyanate adduct.
Claim 18
Dependent Claim
24 words
The composition of claim 13 wherein said polyisocyanate is a polyisocyanate adduct containing monoisocyanurate and monoallophanate groups in a ratio of 10:1 to 1:10.
Claim 19
Dependent Claim
10 words
The composition of claim 13 wherein said diamine comprises bis-(4-aminocyclohexyl)-methane.
Claim 20
Dependent Claim
10 words
The composition of claim 14 wherein said diamine comprises bis-(4-aminocyclohexyl)-methane.
Claim 21
Dependent Claim
10 words
The composition of claim 15 wherein said diamine comprises bis-(4-aminocyclohexyl)-methane.
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