Polyurethanes, articles and coatings prepared therefrom and methods of making the same
First Claim
1. A method of preparing polyurethane from reaction components comprising:
- (1) reacting about 1 equivalent of at least one polyisocyanate; and
about 0.2 to about 0.5 equivalents of at least one polyol (a) having 5 to 18 carbon atoms to form an isocyanate functional urethane prepolymer; and
(2) reacting the isocyanate functional urethane prepolymer, about 0.05 to about 1.0 equivalents of at least one polyol (b) having 4 to 18 carbon atoms and at least 3 hydroxyl groups; and
up to about 0.9 equivalents of at least one polyol (c) different from polyol (b), and having 5 to 18 carbon atoms,wherein the reaction product components are essentially free of polyester polyol and polyether polyol; and
wherein the prepolymer (a), polyol (b) and polyol (c) (if present) are each preheated to and maintained at a temperature of about 120°
C. to about 140°
C. for at least about 10 minutes immediately prior to mixing together within a mixing chamber of a dynamic pin mixer, wherein the mixing chamber has a volume of about 62 cc to about 250 cc, the total flow rate components into the mixing chamber is about 499 to about 4807 grams per minute, and wherein the residence time is from about 0.1 seconds to about 5 minutes.
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Accused Products
Abstract
The present invention provides polyurethanes including a reaction product of components including: (a) an isocyanate functional urethane prepolymer comprising a reaction product of components including: (i) about 1 equivalent of at least one polyisocyanate; and (ii) about 0.1 to about 0.5 equivalents of at least one diol having 2 to 18 carbon atoms; and (b) about 0.05 to about 0.9 equivalents of at least one branched polyol having 4 to 18 carbon atoms and at least 3 hydroxyl groups; and (c) up to about 0.9 equivalents of at least one polyol different from branched polyol (b) and having 2 to 18 carbon atoms, wherein the reaction product components are essentially free of polyester polyol and polyether polyol; compositions, coatings and articles made therefrom and methods of making the same.
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Citations
49 Claims
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1. A method of preparing polyurethane from reaction components comprising:
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(1) reacting about 1 equivalent of at least one polyisocyanate; and
about 0.2 to about 0.5 equivalents of at least one polyol (a) having 5 to 18 carbon atoms to form an isocyanate functional urethane prepolymer; and(2) reacting the isocyanate functional urethane prepolymer, about 0.05 to about 1.0 equivalents of at least one polyol (b) having 4 to 18 carbon atoms and at least 3 hydroxyl groups; and
up to about 0.9 equivalents of at least one polyol (c) different from polyol (b), and having 5 to 18 carbon atoms,wherein the reaction product components are essentially free of polyester polyol and polyether polyol; and wherein the prepolymer (a), polyol (b) and polyol (c) (if present) are each preheated to and maintained at a temperature of about 120°
C. to about 140°
C. for at least about 10 minutes immediately prior to mixing together within a mixing chamber of a dynamic pin mixer, wherein the mixing chamber has a volume of about 62 cc to about 250 cc, the total flow rate components into the mixing chamber is about 499 to about 4807 grams per minute, and wherein the residence time is from about 0.1 seconds to about 5 minutes.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A method of preparing polyurethane from reaction components comprising:
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(1) reacting about 1 equivalent of at least one polyisocyanate; and
about 0.2 to about 0.4 equivalents of pentanediol to form an isocyanate functional urethane prepolymer; and(2) reacting the isocyanate functional urethane prepolymer, about 0.3 to about 0.7 equivalents of trimethylolpropane; and
up to about 0.4 equivalents of pentanediol,wherein the reaction product components comprise less than about 5 weight percent of polyester polyol, less than about 5 weight percent of polycarbonate polyol and less than about 5 weight percent of polyether polyol; and wherein the prepolymer of (1), and the trimethylolpropane and pentanediol (if present) of (2) are each preheated to and maintained at a temperature of about 120°
C. to about 140°
C. for at least about 10 minutes immediately prior to mixing together within a mixing chamber of a dynamic pin mixer, wherein the mixing chamber has a volume of about 62 cc to about 250 cc, the total flow rate components into the mixing chamber is about 499 to about 4807 grams per minute, and wherein the residence time is from about 0.1 seconds to about 5 minutes.
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48. A method of preparing polyurethane from reaction components comprising:
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(1) reacting about 1 equivalent of at least one polyisocyanate; and
about 0.2 to about 0.4 equivalents of pentanediol to form an isocyanate functional urethane prepolymer; and(2) reacting the isocyanate functional urethane prepolymer, about 0.3 to about 0.6 equivalents of trimethylolpropane; and
about 0.1 to about 0.4 equivalents of pentanediol,wherein the reaction product components comprise less than about 5 weight percent of polyester polyol, less than about 5 weight percent of polycarbonate polyol and less than about 5 weight percent of polyether polyol; and wherein the prepolymer of (1), and the trimethylolpropane and pentanediol (if present) of (2) are each preheated to and maintained at a temperature of about 120°
C. to about 140°
C. for at least about 10 minutes immediately prior to mixing together within a mixing chamber of a dynamic pin mixer, wherein the mixing chamber has a volume of about 62 cc to about 250 cc, the total flow rate components into the mixing chamber is about 499 to about 4807 grams per minute, and wherein the residence time is from about 0.1 seconds to about 5 minutes.
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49. A method of preparing polyurethane from reaction components comprising:
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(1) reacting about 1 equivalent of at least one polyisocyanate; and
about 0.2 to about 0.5 equivalents of at least one diol having 5 to 18 carbon atoms to form an isocyanate functional urethane prepolymer; and(2) reacting the isocyanate functional urethane prepolymer, about 0.05 to about 0.9 equivalents of at least one polyol having 4 to 18 carbon atoms and at least 3 hydroxyl groups; and
up to about 0.45 equivalents of at least one diol having 5 to 18 carbon atoms,wherein the reaction product components comprise less than about 5 weight percent of polyester polyol, less than about 5 weight percent of polycarbonate polyol and less than about 5 weight percent of polyether polyol; and wherein the prepolymer of (1), and the trimethylolpropane and pentanediol (if present) of (2) are each preheated to and maintained at a temperature of about 120°
C. to about 140°
C. for at least about 10 minutes immediately prior to mixing together within a mixing chamber of a dynamic pin mixer, wherein the mixing chamber has a volume of about 62 cc to about 250 cc, the total flow rate components into the mixing chamber is about 499 to about 4807 grams per minute, and wherein the residence time is from about 0.1 seconds to about 5 minutes.
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Specification