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US 6,191,248 B1Granted
Coating
AssigneeThe Boeing Company
InventorsDiane C. Rawlings, Larry K. Olli, G. Micheal Granger, Kevin R. Malone
Life of this patent
Estimating the term…
Abstract
Thin film metal particulates are removed from FEP sheetstock cheaply and quickly by immersing the coated FEP first in a base and then in an acid. Occasionally, ultrasonic vibration of the FEP may also be required. The particulates are useful as paint pigments when isolated and conversion coated. The FEP is reusable. A preferred binder for carrying the pigments is a two-component system having a tetraketimine and an isocyanate.
Claims18
A coating formulation adapted to cure to a durable and tough polyurea, free of hydrocarbon unsaturation, comprising a two-component binder having:
- (a) an alicyclic polyurea polyketimine having appreciable molecular weight to provide toughness and durability to the coating and at least four ketimine functionalities;
- (b) an alicyclic isocyanate in substantially stoichiometric proportions with the polyketimine;
- and
- (c) about 1-50 wt % of a pigment to provide the desired color, gloss, or reflectivity, the pigment including an effective amount of metal flakes to provide opacity with minimum edge effects (i.e., scattering).
1 more element
A coating formulation adapted to cure to a durable and tough polyurea, free of hydrocarbon unsaturation, comprising a two-component binder having:
- (a) an alicyclic polyurea polyketimine having at least four ketimine functionalities;
- (b) 2-Heptyl-3,4-bis (9-isocyanatononyl)-1-pentylcyclohexane in substantially stoichiometric proportions with the polyketimine;
- and
- (c) about 1-50 wt % of a pigment to provide the desired color, gloss, or reflectivity.
1 more element
A coating formulation adapted to cure to a durable and tough polyurea, free of hydrocarbon unsaturation, comprising a two-component binder having:
- (a) an alicyclic polyurea polyketimine having at least four ketimine functionalities;
- (b) an alicyclic isocyanate in substantially stoichiometric proportions with the polyketimine;
- and
- (c) about 1-50 wt % of a pigment to provide the desired color, gloss, or reflectivity
- wherein the polyketimine is prepared by:
- (a) protecting primary amine functionalities on an aliphatic polyamine having at least one secondary amine and terminal primary amines with ketimine linkages, and
- (b) reacting the secondary amine of at least two protected polyamines from step (a) with 2-Heptyl-3,4-bis(9-isocyanatononyl)-1-pentylcyclohexane to form urea linkages, wherein the polyamine is:
- H2N—C2H4—NH—C2H4—NH2,
- H2N—C2H4—NH—C2H4—NH—C2H4—NH2
- H2N—(CH2)6—NH—(CH2)6—NH2,
- or mixtures thereof.
8 more elements
A coating formulation adapted to cure to a durable and tough polyurea, free of hydrocarbon unsaturation, comprising a two-component binder having:
- (a) an alicyclic polyurea polyketimine having at least four ketimine functionalities;
- (b) an isocyanate in substantially stoichiometric proportions with the polyketimine;
- and
- (c) about 1-50 wt % of a pigment to provide the desired color, gloss, or reflectivity
- wherein the polyketimine is prepared by:
- (a) protecting primary amine functionalities on an aliphatic polyamine having at least one secondary amine and terminal primary amines with ketimine linkages, and
- (b) reacting the secondary amine of at least two protected polyamines from step (a) with 2-Heptyl-3,4-bis(9-isocyanatononyl)-1-pentylcyclohexane to from urea linkages, wherein the polyamine is:
- H2N—C2H4—NH—C2H4—NH2,
- H2N—C2H4—NH—C2H4—NH—C2H4—NH2
- H2N—(CH2)6—NH—(CH2)6—NH2,
- or mixtures thereof, and
- wherein the isocyanate is:
- triaminononane trisisocyanate, hexamethylenediisocyanate (HDI), HDI trimers, 2Heptyl-3,4-bis(9-isocyanatononyl)-1-pentylcyclohexane, a C12 to C36 aliphatic or alicyclic diisocyanate, meta-tetramethylxylyenediisocyanate, hydrogenated methylene-bisphenylene diisocyanate, isophorone diisocyanate, or mixtures thereof.
10 more elements
A method for making a polyurea coating, comprising the steps of:
- combining at least one saturated alicyclic polyketimine having at least two urea linkages formed by reacting an amine with an alicyclic isocyanate, at least one aliphatic or alicyclic diisocyanate selected from C12 to C36 diisocyanates or 2-Heptyl-3,4-bis (9-isocyanatononyl)-1-pentylcyclohexane, and 40-50 wt % of suitable pigments, including an effective amount of metal flakes in the size range of about 900-1100 Å×30-50 μm×30-50 μm, the flakes and pigments to provide color, gloss, or reflectivity, the flakes being thick enough to provide opacity while producing minimum edge effects (i.e., scattering), the amine, isocyanate and diisocyanate being of appreciable molecular weight to provide toughness and durability to the coating.
A method for making a polyurea coating comprising the steps of:
- combining at least one saturated alicyclic polyketimine having at least two urea linkages formed by reacting an amine with an alicyclic isocyanate when preparing the polyketimine, at least one alicyclic isocyanate, and 40-50 wt % of suitable pigments to provide color, gloss, or reflectivity, the pigments including metal flakes in the size range of about 900-1100 Å×30-50 μm×30-50 μm to provide opacity with minimum edge effects,
- wherein the polyketimine has at least four ketimine functionalities and is prepared by:
- (a) protecting primary amine functionalities on an aliphatic polyamine selected from H2N—C2H4—NH—C2H4—NH2;
- H2N—C2H4—NH—C2H4—NH—C2H4—NH2;
- H2N—(CH2)6—NH—(CH2)6—NH2;
- or mixtures thereof, and
- (b) reacting the secondary amine of the protected polyamine with an alicyclic polyisocyanate to form a urea linkage,
- wherein the polyisocyanate in the polyketimine and the isocyanate are the same compound.
5 more elements
A method for making a polyurea coating, comprising the steps of:
- combining at least one saturated alicyclic polyketimine having at least two urea linkages formed by reacting an amine with an alicyclic isocyanate when preparing the polyketimine, 2-Heptyl-3,4-bis(9-isocyanatononyl)-1-pentylcyclohexane, and 40-50 wt % of suitable pigments to provide color, gloss, or reflectivity, including an effective amount of metal flakes in the size range of about 900-1100 Å×30-50 μm×30-50 μm to provide opacity with minimum edge effects.
A method for making a polyurea coating, comprising the steps of:
- combining a polyketimine free of hydrocarbon unsaturation having at least two urea linkages formed by reacting, when preparing the polyketimine, an amine with an isocyanate selected from the group consisting of:
- triaminononane trisisocyanate, hexamethylenediisocyanate (HDI), HDI trimers, 2-Heptyl-3,4-bis(9-isocyanatononyl)-1-pentylcyclohexane, a C12 to C36 aliphatic or alicyclic diisocyanate, meta-tetramethylxylyenediisocyanate, hydrogenated methylene-bisphenylene diisocyanate, isophorone diisocyanate, or mixtures thereof,
- at least one aliphatic or alicyclic isocyanate selected from the group consisting of:
- triaminononane trisisocyanate, hexamethylenediisocyanate (HDI), HDI trimers, 2-Heptyl-3,4-bis(9-isocyanatononyl)-1-pentylcyclohexane, a C12 to C36 aliphatic or alicyclic diisocyanate, meta-tetramethylxylyenediisocyanate, hydrogenated methylene-bisphenylene diisocyanate, isophorone diisocyanate, or mixtures thereof,
- and 40-50 wt % of suitable pigments to provide color, gloss, or reflectivity including an effective amount of metal flakes in the size range of about 900-1100 Å×30-50 μm×30-50 μm to provide opacity with minimum edge effects.
2 more elements
A polyurea coating formulation adapted to cure to a durable and tough polyurea, free of hydrocarbon unsaturation, comprising a two-component binder having:
- (a) a polyurea polyketimine;
- (b) an alicyclic isocyanate in substantially stoichiometric proportions with the polyketimine;
- and
- (c) about 1-50 wt % of a pigment to provide the desired color, gloss, or reflectivity
- wherein the polyketimine is made by reacting an isocyanate with a polyamine to form urea linkages, wherein the isocyanate in both the polyketimine and the formulation is:
- 2-Heptyl-3,4-bis(9-isocyanatononyl)-1-pentylcyclohexane,
- and wherein the polyamine is:
- Tris(2-aminoethyl)amine.
5 more elements
Dependencies are inferred from the claim text.