CA3028127C - Polyurethane compositions for coating - Google Patents
Polyurethane compositions for coating Download PDFInfo
- Publication number
- CA3028127C CA3028127C CA3028127A CA3028127A CA3028127C CA 3028127 C CA3028127 C CA 3028127C CA 3028127 A CA3028127 A CA 3028127A CA 3028127 A CA3028127 A CA 3028127A CA 3028127 C CA3028127 C CA 3028127C
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- Prior art keywords
- polyol
- aromatic
- isocyanate
- coating composition
- component
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- 239000000203 mixture Substances 0.000 title claims abstract description 72
- 239000004814 polyurethane Substances 0.000 title claims abstract description 47
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 47
- 238000000576 coating method Methods 0.000 title claims abstract description 34
- 239000011248 coating agent Substances 0.000 title claims abstract description 30
- 239000012948 isocyanate Substances 0.000 claims abstract description 103
- 229920005862 polyol Polymers 0.000 claims abstract description 88
- 150000003077 polyols Chemical class 0.000 claims abstract description 88
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 63
- -1 aromatic isocyanates Chemical class 0.000 claims abstract description 44
- 239000003054 catalyst Substances 0.000 claims abstract description 30
- 150000004984 aromatic diamines Chemical class 0.000 claims abstract description 19
- 239000002516 radical scavenger Substances 0.000 claims abstract description 17
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 16
- 239000004014 plasticizer Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 10
- 125000003118 aryl group Chemical group 0.000 claims description 10
- 229920000570 polyether Polymers 0.000 claims description 10
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 9
- 229920001451 polypropylene glycol Polymers 0.000 claims description 9
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 8
- 229920001228 polyisocyanate Polymers 0.000 claims description 7
- 239000005056 polyisocyanate Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 229920005906 polyester polyol Polymers 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 150000001412 amines Chemical group 0.000 claims description 3
- 125000002883 imidazolyl group Chemical group 0.000 claims description 2
- 239000011527 polyurethane coating Substances 0.000 claims 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 4
- 229920000909 polytetrahydrofuran Polymers 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 150000002334 glycols Chemical class 0.000 description 2
- 150000002917 oxazolidines Chemical class 0.000 description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 2
- 229920001610 polycaprolactone Polymers 0.000 description 2
- 239000004632 polycaprolactone Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000004848 polyfunctional curative Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- VOZKAJLKRJDJLL-UHFFFAOYSA-N 2,4-diaminotoluene Chemical compound CC1=CC=C(N)C=C1N VOZKAJLKRJDJLL-UHFFFAOYSA-N 0.000 description 1
- OBCSAIDCZQSFQH-UHFFFAOYSA-N 2-methyl-1,4-phenylenediamine Chemical compound CC1=CC(N)=CC=C1N OBCSAIDCZQSFQH-UHFFFAOYSA-N 0.000 description 1
- 231100000716 Acceptable daily intake Toxicity 0.000 description 1
- 101800004706 Somatostatin-22 Proteins 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- KIQKWYUGPPFMBV-UHFFFAOYSA-N diisocyanatomethane Chemical compound O=C=NCN=C=O KIQKWYUGPPFMBV-UHFFFAOYSA-N 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 239000012039 electrophile Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012038 nucleophile Substances 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 229920013730 reactive polymer Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011369 resultant mixture Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 1
- 238000005829 trimerization reaction Methods 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/088—Removal of water or carbon dioxide from the reaction mixture or reaction components
- C08G18/0885—Removal of water or carbon dioxide from the reaction mixture or reaction components using additives, e.g. absorbing agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3225—Polyamines
- C08G18/3237—Polyamines aromatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3855—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur
- C08G18/3857—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur having nitrogen in addition to sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
- C08G18/8006—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32
- C08G18/8009—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203
- C08G18/8022—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203 with polyols having at least three hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
Abstract
The present disclosure provides a polyurethane composition comprising a reaction product of an isocyanate component comprising one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of about 2-30% NCO; and a polyol component comprising a polyol having an equivalent weight (EW) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst. A process for preparing the polyurethane composition and an article, coating or film comprising the polyurethane composition are also provided.
Description
POLYURETHANE COMPOSITIONS FOR COATING
TECHNICAL FIELD
[001]
This disclosure relates to a urethane composition. In particular, this disclosure relates to a polyurethane composition for coating various objects and methods for making such composition and applications of such composition. The polyurethane composition of the present disclosure may be water resistant and may also set or cure quickly and have superior tear or abrasion resistance and durability.
BACKGROUND
TECHNICAL FIELD
[001]
This disclosure relates to a urethane composition. In particular, this disclosure relates to a polyurethane composition for coating various objects and methods for making such composition and applications of such composition. The polyurethane composition of the present disclosure may be water resistant and may also set or cure quickly and have superior tear or abrasion resistance and durability.
BACKGROUND
[002] Polyurethane based systems are used for producing various coatings.
They generally comprise an isocyanate component and a polyol component. Some of the existing polyurethane based coating systems do not set quickly. Other known systems do not perform well in the presence of moisture. This may be because the isocyanate portion of the system has a stronger affinity for, or reacts faster with water than the polyol portion, to produce carbon dioxide. As a result, air bubbles can form in the resulting coating (also known as foaming) and the coating may have poor tear or abrasion resistance or poor durability. In some applications where the coating substrate has a surface that is susceptible to moisture absorption, for example, a cardboard, it may be undesirable to use a polyurethane based system due to its hydrophilicity towards water.
They generally comprise an isocyanate component and a polyol component. Some of the existing polyurethane based coating systems do not set quickly. Other known systems do not perform well in the presence of moisture. This may be because the isocyanate portion of the system has a stronger affinity for, or reacts faster with water than the polyol portion, to produce carbon dioxide. As a result, air bubbles can form in the resulting coating (also known as foaming) and the coating may have poor tear or abrasion resistance or poor durability. In some applications where the coating substrate has a surface that is susceptible to moisture absorption, for example, a cardboard, it may be undesirable to use a polyurethane based system due to its hydrophilicity towards water.
[003] It is desirable to provide a polyurethane based coating system, which may set quickly, and may also be water resistant under ambient humidity, and the resulting coating may have superior tear or abrasion resistance and durability.
SUMMARY
SUMMARY
[004]
In one aspect, the disclosure provides a polyurethane composition comprising a reaction product of an isocyanate component comprising one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of about 2-30%; and a polyol component comprising a polyol having an equivalent weight (EVV) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst.
In one aspect, the disclosure provides a polyurethane composition comprising a reaction product of an isocyanate component comprising one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of about 2-30%; and a polyol component comprising a polyol having an equivalent weight (EVV) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst.
[005] In another aspect, the present disclosure provides an article, a coating or a film, which comprises a polyurethane composition of the present disclosure.
[006] In another aspect, the present disclosure provides a process for preparing a polyurethane composition. The process comprises providing an isocyanate component comprising one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of 2-30%, providing a polyol component comprising a polyol having an equivalent weight (EVV) of 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst and reacting the isocyanate component with the polyol component to produce the polyurethane composition.
[007] In another aspect, the present disclosure provides a kit for a polyurethane composition. The kit comprises an isocyanate component comprising one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of about 2-30%; a polyol component comprising a polyol having an equivalent weight (EVV) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst; and handling instructions for making the polyurethane composition.
[008] In another aspect, the present disclosure provides a polyurethane based coating system comprising an isocyanate component comprising one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of about 2-30%; and a polyol component comprising a polyol having an equivalent weight (EVV) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst.
The isocyanate component and the polyol component react to form a polyurethane based coating when the two components are mixed together.
BRIEF DESCRIPTION OF THE DRAWINGS
The isocyanate component and the polyol component react to form a polyurethane based coating when the two components are mixed together.
BRIEF DESCRIPTION OF THE DRAWINGS
[009] An embodiment will now be described in detail by way of example, with reference to the accompanying drawings in which:
[0010]
Figure 1 is a photographic representation showing a coating resulting from a polyurethane composition according to one embodiment of the present disclosure.
Figure 1 is a photographic representation showing a coating resulting from a polyurethane composition according to one embodiment of the present disclosure.
[0011]
Figure 2 is a photographic representation taken from a different angle showing the coating of Figure 1.
DETAILED DESCRIPTION
Figure 2 is a photographic representation taken from a different angle showing the coating of Figure 1.
DETAILED DESCRIPTION
[0012]
The description, which follows, and the embodiments described therein, are provided by way of illustration of an example, or examples of particular embodiments of principles and aspects of the present invention. These examples are provided for the purposes of explanation, and not of limitation, of those principles and of the invention.
The description, which follows, and the embodiments described therein, are provided by way of illustration of an example, or examples of particular embodiments of principles and aspects of the present invention. These examples are provided for the purposes of explanation, and not of limitation, of those principles and of the invention.
[0013]
The present disclosure provides a polyurethane composition comprising a reaction product of an isocyanate component comprising one or more aromatic isocyanates, and a polyol component comprising a polyol, an aromatic diamine, a moisture scavenger and a catalyst. The polyurethane composition can be used to coat various substrates. The polyurethane composition may cure quickly and may be water resistant under ambient conditions.
Coatings resulting from the polyurethane composition may have superior tear or abrasion resistance and durability.
The present disclosure provides a polyurethane composition comprising a reaction product of an isocyanate component comprising one or more aromatic isocyanates, and a polyol component comprising a polyol, an aromatic diamine, a moisture scavenger and a catalyst. The polyurethane composition can be used to coat various substrates. The polyurethane composition may cure quickly and may be water resistant under ambient conditions.
Coatings resulting from the polyurethane composition may have superior tear or abrasion resistance and durability.
[0014]
In one embodiment, the polyurethane composition comprises a reaction product of an isocyanate component and a polyol component. The isocyanate component comprises one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of about 2-30%. The aromatic isocyanate is present in about 80-100 wt% based on the total mass or weight of the isocyanate component. The aromatic isocyanate may be an aromatic isocyanate prepolymer, or an aromatic polyisocyanate. The isocyanate component may further comprise a non-reactive plasticizer and/or an air release agent. The polyol component comprises a polyol having an equivalent weight (EVV) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst. The polyol is present in about 55-85 wt% of the polyol component. The polyol component may further comprise an aromatic plasticizer, an air release agent, and/or dye.
In one embodiment, the polyurethane composition comprises a reaction product of an isocyanate component and a polyol component. The isocyanate component comprises one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of about 2-30%. The aromatic isocyanate is present in about 80-100 wt% based on the total mass or weight of the isocyanate component. The aromatic isocyanate may be an aromatic isocyanate prepolymer, or an aromatic polyisocyanate. The isocyanate component may further comprise a non-reactive plasticizer and/or an air release agent. The polyol component comprises a polyol having an equivalent weight (EVV) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst. The polyol is present in about 55-85 wt% of the polyol component. The polyol component may further comprise an aromatic plasticizer, an air release agent, and/or dye.
[0015]
In one embodiment, the reaction product comprises about two parts of the isocyanate component and about one part of the polyol component by volume. For each component, the allowable deviation may be about 5%.
In one embodiment, the reaction product comprises about two parts of the isocyanate component and about one part of the polyol component by volume. For each component, the allowable deviation may be about 5%.
[0016]
In some embodiments, the isocyanate component and the polyol component may be provided in a kit with instructions on how to prepare a polyurethane composition of the present disclosure.
lsocyanate Component
In some embodiments, the isocyanate component and the polyol component may be provided in a kit with instructions on how to prepare a polyurethane composition of the present disclosure.
lsocyanate Component
[0017]
The term "isocyanate component" is used interchangeably with the term "resin" throughout the present disclosure and may be understood as an electrophile.
The isocyanate component comprises one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of about 2-30%. As well understood by a person of ordinary skill in the art, the term "NCO content" is a measure of the content of unreacted isocyanate groups of an isocyanate prepolymer or other isocyanate-containing compound, measured as the weight percent of unreacted isocyanate groups in the material. Aromatic isocyanates having about 2-30% NCO
known in the art may be used. For example, one exemplary isocyanate is an aromatic diisocyanate having about 8% NCO.
The term "isocyanate component" is used interchangeably with the term "resin" throughout the present disclosure and may be understood as an electrophile.
The isocyanate component comprises one or more aromatic isocyanates, wherein the aromatic isocyanate has an isocyanate (NCO) content of about 2-30%. As well understood by a person of ordinary skill in the art, the term "NCO content" is a measure of the content of unreacted isocyanate groups of an isocyanate prepolymer or other isocyanate-containing compound, measured as the weight percent of unreacted isocyanate groups in the material. Aromatic isocyanates having about 2-30% NCO
known in the art may be used. For example, one exemplary isocyanate is an aromatic diisocyanate having about 8% NCO.
[0018]
Exemplary aromatic isocyanates include aromatic isocyanate prepolymers or aromatic polyisocyanates. Aromatic isocyanate prepolymers may include isocyanates that have at least one aromatic moiety substituted with at least one unreacted isocyanate moiety.
In some embodiments, the aromatic isocyanate prepolymer may be an aromatic diisocyanate such as a methylenediphenyl diisocyanate (MDI) and a toluene diisocyanate (TDI), and any derivatives thereof. Exemplary MDIs include 4,4'-, 2,4'- and 2,2'-isomers of MDI and their derivatives. Exemplary TDIs include 2,4- and 2,6- isomers of TDI and their derivatives.
Exemplary aromatic isocyanates include aromatic isocyanate prepolymers or aromatic polyisocyanates. Aromatic isocyanate prepolymers may include isocyanates that have at least one aromatic moiety substituted with at least one unreacted isocyanate moiety.
In some embodiments, the aromatic isocyanate prepolymer may be an aromatic diisocyanate such as a methylenediphenyl diisocyanate (MDI) and a toluene diisocyanate (TDI), and any derivatives thereof. Exemplary MDIs include 4,4'-, 2,4'- and 2,2'-isomers of MDI and their derivatives. Exemplary TDIs include 2,4- and 2,6- isomers of TDI and their derivatives.
[0019]
Examples of aromatic polyisocyanate include a polymeric MDI, a blend of a polymeric MDI and a MDI, a polymeric TDI, a blend of a polymeric TDI and a TDI, and any blend or combination thereof. The repeating units of the polyisocyanate may be any one of the prepolymers described above, including any combinations of the prepolymers described above.
Examples of aromatic polyisocyanate include a polymeric MDI, a blend of a polymeric MDI and a MDI, a polymeric TDI, a blend of a polymeric TDI and a TDI, and any blend or combination thereof. The repeating units of the polyisocyanate may be any one of the prepolymers described above, including any combinations of the prepolymers described above.
[0020]
In some embodiments, the aromatic isocyanate prepolymer or polyisocyanate is a reaction product of an aromatic isocyanate prepolymer and a polyol reactant. Any polyol reactants containing reactive hydroxyl groups known in the art may be used. For example, when a polyol reactant contains an active hydroxyl group, the reaction of the active hydroxyl group with an isocyanate moiety results in the formation of a urethane linkage. As such, the prepolymer may include both a urethane linkage and an isocyanate terminal group. In some embodiments, the polyol reactant may be polypropylene glycol, polyether polyol, polyester polyol, trimethylolpropane (TMP) or any combinations or derivatives thereof. Exemplary polyols may include 1,2-propylene glycol, ethylene glycol, glycerine, polytetramethylene ether glycol (PTMEG), pentaerythritol and the like.
In some embodiments, the aromatic isocyanate or polyisocyanate may be prepared in a one-pot procedure using at least one polyether polyol and any one of the aforementioned aromatic diisocyanates according to any of the known methods in the art.
In some embodiments, the aromatic isocyanate prepolymer or polyisocyanate is a reaction product of an aromatic isocyanate prepolymer and a polyol reactant. Any polyol reactants containing reactive hydroxyl groups known in the art may be used. For example, when a polyol reactant contains an active hydroxyl group, the reaction of the active hydroxyl group with an isocyanate moiety results in the formation of a urethane linkage. As such, the prepolymer may include both a urethane linkage and an isocyanate terminal group. In some embodiments, the polyol reactant may be polypropylene glycol, polyether polyol, polyester polyol, trimethylolpropane (TMP) or any combinations or derivatives thereof. Exemplary polyols may include 1,2-propylene glycol, ethylene glycol, glycerine, polytetramethylene ether glycol (PTMEG), pentaerythritol and the like.
In some embodiments, the aromatic isocyanate or polyisocyanate may be prepared in a one-pot procedure using at least one polyether polyol and any one of the aforementioned aromatic diisocyanates according to any of the known methods in the art.
[0021]
In some embodiments, the aromatic isocyanates may account for about 80-100 wt% of the isocyanate component. In one embodiment, the aromatic isocyanates are MD's having about 8% NCO and account for about 95 wt% of the isocyanate component.
Polyol Component
In some embodiments, the aromatic isocyanates may account for about 80-100 wt% of the isocyanate component. In one embodiment, the aromatic isocyanates are MD's having about 8% NCO and account for about 95 wt% of the isocyanate component.
Polyol Component
[0022]
The term "polyol component" is used interchangeably with the terms "hardener" or "curative" throughout the present disclosure and may be understood as a nucleophile. The polyol component comprises a polyol having an equivalent weight (EW) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst.
The term "polyol component" is used interchangeably with the terms "hardener" or "curative" throughout the present disclosure and may be understood as a nucleophile. The polyol component comprises a polyol having an equivalent weight (EW) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst.
[0023]
As well understood by a person of ordinary skill in the art, in polymer chemistry, the equivalent weight (EW) of a reactive polymer is the weight of a compound per reacting site. This term is generally used to indicate the reactivity of a polymer for example, a polyol.
The EW value of a polymer may be calculated Molecular Wevzht Equivalent Weight ¨
Functituutlitv according to the following equation:
. In the case of a polyol or a polyol blend, the average equivalent weight is normally calculated according to the following equation:
/
Equivaieni Weight =
OH Number + acid number . Any polyols having an EW
of about 1500-25000 known in the art may be used. In one embodiment, the polyol is polypropylene glycol polyether triol having an EW of about 2000.
As well understood by a person of ordinary skill in the art, in polymer chemistry, the equivalent weight (EW) of a reactive polymer is the weight of a compound per reacting site. This term is generally used to indicate the reactivity of a polymer for example, a polyol.
The EW value of a polymer may be calculated Molecular Wevzht Equivalent Weight ¨
Functituutlitv according to the following equation:
. In the case of a polyol or a polyol blend, the average equivalent weight is normally calculated according to the following equation:
/
Equivaieni Weight =
OH Number + acid number . Any polyols having an EW
of about 1500-25000 known in the art may be used. In one embodiment, the polyol is polypropylene glycol polyether triol having an EW of about 2000.
[0024]
Examples of suitable polyols include a polypropylene glycol based polyol, polyether polyol, polyester polyol, polycaprolactone polyol and any combinations or derivatives thereof. Exemplary polyols may be 1,2-propylene glycol, polypropylene glycol, polyether glycol, ethylene glycol, glycerine, polytetramethylene ether glycol (PTMEG) or pentaerythritol. In some embodiments, the polyester polyol may be prepared from reacting diacids and glycols of various molecular weights ranging from about 200-2000. In other embodiments, the polylactone polyol may be any cyclic polyester glycols with various molecular weights ranging from about 200-2000.
Examples of suitable polyols include a polypropylene glycol based polyol, polyether polyol, polyester polyol, polycaprolactone polyol and any combinations or derivatives thereof. Exemplary polyols may be 1,2-propylene glycol, polypropylene glycol, polyether glycol, ethylene glycol, glycerine, polytetramethylene ether glycol (PTMEG) or pentaerythritol. In some embodiments, the polyester polyol may be prepared from reacting diacids and glycols of various molecular weights ranging from about 200-2000. In other embodiments, the polylactone polyol may be any cyclic polyester glycols with various molecular weights ranging from about 200-2000.
[0025] In exemplary embodiments, the polyol may account for about 55-85 wt%
of the polyol component. In one embodiment, the polyol is polypropylene glycol polyether triol having an EW of about 2000 and accounts for about 60 wt% of the polyol component.
of the polyol component. In one embodiment, the polyol is polypropylene glycol polyether triol having an EW of about 2000 and accounts for about 60 wt% of the polyol component.
[0026]
Without being limited to any particular theory, it is generally understood that the hydroxyl functional groups of the polyol react with the isocyanates from the isocyanate components to produce polyurethanes.
Without being limited to any particular theory, it is generally understood that the hydroxyl functional groups of the polyol react with the isocyanates from the isocyanate components to produce polyurethanes.
[0027]
The polyol component further comprises an aromatic diamine in the amount of about 8-35 wt% of the polyol component. Any known aromatic diamines may be used. In one embodiment, about 34 wt% of an aromatic thiol amine is used.
Other examples of suitable aromatic diamines include any aromatic diamines having a molecular weight of about 100 to about 500 such as 2,4-toluene diamine and 2,5-toluene diamine. Without being limited to any particular theory, it is hypothesized that the aromatic diamine may assist in building the mechanical properties of the resulting coating quickly by facilitating the setting of the polyurethane composition.
The polyol component further comprises an aromatic diamine in the amount of about 8-35 wt% of the polyol component. Any known aromatic diamines may be used. In one embodiment, about 34 wt% of an aromatic thiol amine is used.
Other examples of suitable aromatic diamines include any aromatic diamines having a molecular weight of about 100 to about 500 such as 2,4-toluene diamine and 2,5-toluene diamine. Without being limited to any particular theory, it is hypothesized that the aromatic diamine may assist in building the mechanical properties of the resulting coating quickly by facilitating the setting of the polyurethane composition.
[0028] The polyol component further comprises a catalyst to facilitate the formation of the polyurethane composition. Any commercially available catalyst known in the art may be used. Suitable catalysts may be either amine based, for example, imidazole based, or metal based, or a combination thereof, and can be readily selected based on the other elements of the composition. In one embodiment, the catalyst is present in small amounts, for example, in the amount of about 0.05-1.0 wt% of the polyol component. In another embodiment, the catalyst is an imidazole catalyst in about 0.1 wt% of the polyol componet. In other embodiments, the catalyst may be selected from a tin based catalyst such as a tin carboxylate, or an organotin compound.
Other suitable amine catalysts may include 1,4-diazabicyclo[2.2.2]octane (DABCO) and its derivatives.
Other suitable amine catalysts may include 1,4-diazabicyclo[2.2.2]octane (DABCO) and its derivatives.
[0029] Without being limited to any particular theory, when forming the polyurethane composition, in addition to the formation of the urethane linkages, there may also be reactions of the isocyanates with water to cause foaming or bubbling and trimerization of the isocyanates to form isocyanurates. A suitable catalyst may be selected so as to favor the formation of the urethanes over the other two reactions. For example, an imidazole catalyst in the amount of 0.1 wt% may be selected.
[0030] In some embodiments, to enhance the water resistance property of the polyurethane composition, a moisture scavenger may be added to the polyol component. If included, the moisture scavenger may be present in an amount of about 0.05 wt% to about 2 wt% of the polyol component. Exemplary moisture scavengers may be any chemical or physical moisture scavengers known in the art. For example, the chemical moisture scavengers may be any oxazolidines that are commonly used as such and the physical moisture scavengers may be any zeolites that are commonly used as such.
Additives
Additives
[0031] Various additives may be added to the isocyanate component and/or to the polyol component to further adjust the properties and/or appearances of the resultant coatings.
[0032] Exemplary additives that may be added to the isocyanate component may include a non-reactive plasticizer and/or an air release agent. The non-reactive plasticizer may be present in up to about 20 wt% of the isocyanate component, for example, about 5 wt%. The non-reactive plasticizer may be an aromatic plasticizer such as phthalate based oil.
[0033] Exemplary air release agent may be any known air release agent and may account for up to about 1.0 wt% of the isocyanate component, for example, about 0.10 wt%.
[0034] Exemplary additives that may be added to the polyol component may include a non-reactive plasticizer, an air release agent and/or a dye. The non-reactive plasticizer may be present in an amount of up to about 10 wt% of the polyol component, for example, about 3 wt%. The non-reactive plasticizer may be an aromatic plasticizer such as phthalate based oil.
[0035] Exemplary air release agent may be any known air release agent and may account for up to about 1.0 wt% of the isocyanate component, for example, 0.40 wt%.
[0036] A dye may be added to the polyol component to allow the resultant coating to appear in a specific colour. The particular dye and the amount of dye may be selected in accordance with the desired appearance of the coating.
Polyurethane Composition
Polyurethane Composition
[0037] A polyurethane composition may be prepared by mixing the isocyanate component with the polyol component in situ before applying the composition to a substrate and then allowing the resultant mixture to cure to form a polyurethane based coating on the substrate. In one embodiment, the mixture is about 2 parts isocyanate component and about 1 part polyol component by volume. An optimal ambient temperature may be between about 18 C to about 35 C.
[0038] It should be noted that the amount of the elements in either the isocyanate component or the polyol component may be varied depending on the intended application of the polyurethane composition, for example, to alter mechanical properties of the resultant coating formed using the composition.
[0039] Exemplary substrates for coating may include paper products, textiles, wood products, metals, plastics, natural stones and minerals. Essentially, the polyurethane composition of the present disclosure may apply to any substrate surface that is susceptible to moisture under ambient conditions.
[0040] It has been found that in some embodiments, coatings formed using the polyurethane composition provide good water resistance while still realizing desirable mechanical properties such as hardness. It has also been found that in some embodiments, the reaction mixture cure quickly, for example, within about 5-15 minutes under ambient conditions. In other embodiments, the resultant coating may adopt a glasslike finish possibly due to carbon dioxide formation during curing.
[0041] Example compositions can be prepared from the ingredients shown in Table 1 below.
Table 1 Example Formulations Isocyanate Component (Resin) Ingredient Concentration (Range) (wt%) Property Methylene diisocyanate 94.9% (80-100%) 8% NCO (2-30 %
prepolymer NCO) -Aromatic plasticizer 5% (0-20%) Any non-reactive (Phthalate based oil) plasticizer Air Release agent 0.10% (0-1.0%) Polyol Component (Curative or Hardener) Ingredient Concentration Property Exemplary (Range) (wt %) (range) Alternatives Polypropylene glycol 60.0% (55-85%) 2000 EW (1500- Polyether, polyether triol 2500 EVV) polyester, or polycaprolactone based polyols ¨
either diols or triols Aromatic thiol diamine 34% (8-35%) Other aromatic diamines Imidazole catalyst 0.1% (0.05-1.0%) Other imidazole catalysts, metal based catalysts Aromatic plasticizer 3% (0-10%) Non-reactive Phthalate based plasticizer oils Reactive moisture Oxazolidines, scavenger zeolites, other known chemical or physical moisture scavengers Air release agent 0.4 % (0.0-1.0%) Any air release agent Dye 2%
Table 1 Example Formulations Isocyanate Component (Resin) Ingredient Concentration (Range) (wt%) Property Methylene diisocyanate 94.9% (80-100%) 8% NCO (2-30 %
prepolymer NCO) -Aromatic plasticizer 5% (0-20%) Any non-reactive (Phthalate based oil) plasticizer Air Release agent 0.10% (0-1.0%) Polyol Component (Curative or Hardener) Ingredient Concentration Property Exemplary (Range) (wt %) (range) Alternatives Polypropylene glycol 60.0% (55-85%) 2000 EW (1500- Polyether, polyether triol 2500 EVV) polyester, or polycaprolactone based polyols ¨
either diols or triols Aromatic thiol diamine 34% (8-35%) Other aromatic diamines Imidazole catalyst 0.1% (0.05-1.0%) Other imidazole catalysts, metal based catalysts Aromatic plasticizer 3% (0-10%) Non-reactive Phthalate based plasticizer oils Reactive moisture Oxazolidines, scavenger zeolites, other known chemical or physical moisture scavengers Air release agent 0.4 % (0.0-1.0%) Any air release agent Dye 2%
[0042] Exemplary polyurethane compositions prepared according to Table above may have the properties shown in Table 2 below. Figures 1 and 2 show a coating resulting from an exemplary polyurethane composition made according to one embodiment of the present disclosure. The coating is the area shown in black.
Table 2 Composition Properties Property Value Range Hardnessa 90 Shore A 60-99Shore A
Gel time of 100 6 minutes 5-15 minutes gm mass at Pot life of 100 4 minutes 1-8 minutes gm mass at Mixed viscosity 3500 cps 2000-4000 cps at 22 Cb Peak exotherm 45 C
100 gm mass at Specific gravity 1.08 a All measurements made by shore hardness Durometer unless otherwise specified.
b All measurements made by viscometer, analog or digital, spindle 4, 10 RPM
unless otherwise specified.
Table 2 Composition Properties Property Value Range Hardnessa 90 Shore A 60-99Shore A
Gel time of 100 6 minutes 5-15 minutes gm mass at Pot life of 100 4 minutes 1-8 minutes gm mass at Mixed viscosity 3500 cps 2000-4000 cps at 22 Cb Peak exotherm 45 C
100 gm mass at Specific gravity 1.08 a All measurements made by shore hardness Durometer unless otherwise specified.
b All measurements made by viscometer, analog or digital, spindle 4, 10 RPM
unless otherwise specified.
[0043] Without intending to limit the scope of the exemplary embodiment, the following examples are intended to illustrate exemplary polyurethane compositions.
Examples
Examples
[0044] Example 1 Polyurethane Composition
[0045] A polyurethane composition was prepared in accordance with Table 1 above.
[0046] The specifications of the resin and curative are shown in Table 3 below.
Table 3 Specifications for Resin and Curative Property Resin Curative Viscosity at 2,800-3,300 cps 1,700-2,200 cps 22 Cb Specific 1.08 0.03 gm/cm3 1.20 0.03 gm/cm3 gravity Shelf life 12 months 12 months b All measurements made by viscometer, analog or digital, spindle 4, 10 RPM
unless otherwise specified.
Table 3 Specifications for Resin and Curative Property Resin Curative Viscosity at 2,800-3,300 cps 1,700-2,200 cps 22 Cb Specific 1.08 0.03 gm/cm3 1.20 0.03 gm/cm3 gravity Shelf life 12 months 12 months b All measurements made by viscometer, analog or digital, spindle 4, 10 RPM
unless otherwise specified.
[0047] The resin and the curative were mixed at a ratio of 100:55.2 ( 2%) by weight (or 100:50.0 by volume).
[0048] The resulting polyurethane composition set quickly. The resulting coating was water resistant and had superior tear resistance and durability. Some properties of the composition and the resulting coating are sown in Table 4 below.
Table 4 Properties of Polyurethane Composition and Coating Property Value Mixed viscosity at 22 Cb 3,000 cps Shore hardness' 93A
Specific gravity 1.08 gm/cm3 Tear strength (ASTM Die C Tear ¨ 450 PSI
D624) Die T Tear¨ 130 PSI
a All measurements made by shore hardness Durometer unless otherwise specified.
ID All measurements made by viscometer, analog or digital, spindle 4, 10 RPM
unless otherwise specified.
Table 4 Properties of Polyurethane Composition and Coating Property Value Mixed viscosity at 22 Cb 3,000 cps Shore hardness' 93A
Specific gravity 1.08 gm/cm3 Tear strength (ASTM Die C Tear ¨ 450 PSI
D624) Die T Tear¨ 130 PSI
a All measurements made by shore hardness Durometer unless otherwise specified.
ID All measurements made by viscometer, analog or digital, spindle 4, 10 RPM
unless otherwise specified.
[0049] While the principles of the invention have been shown and described in connection with specific embodiments, it is to be understood that such embodiments are by way of example and are not limiting. As is evident from the foregoing description, certain aspects of the present invention are not limited by the particular details of the invention illustrated in the drawings. Other modifications and applications, or equivalents, will occur to those skilled in the art. The terms "having", "comprising" and "including" and similar terms as used in the foregoing specification are used in the sense of "optional" or "may include" and not as "required". Many changes, modifications, variations and other uses and applications of the present construction will, however, become apparent to those skilled in the art after considering the specification and attached drawings. All such changes, modifications, variations and other uses and applications which do not depart from the spirit and scope of the invention are deemed to be covered by the invention which is limited only by the claims that follow. The scope of the disclosure is not intended to be limited to the embodiments shown herein, but is to be accorded the full scope consistent with the claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless specifically so stated , but rather one or more.
[0050] It will be understood that any range of values herein is intended to specifically include any intermediate value or sub-range within the given range, and all such intermediate values and sub-ranges are individually and specifically disclosed.
[0051] When a list of items is given herein with an "or" or "and" before the last item, any one of the listed items or any suitable combination of two or more of the listed items may be selected and used.
Claims (20)
1. A polyurethane coating composition for application under ambient conditions, the composition comprising a reaction product of an isocyanate component comprising one or more aromatic isocyanates, wherein the one or more aromatic isocyanates have an isocyanate (NCO) content of 2-17%; and a polyol component comprising a polyol having an equivalent weight (EW) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst.
2. The polyurethane coating composition of claim 1, wherein the one or more aromatic isocyanates are present in an amount of about 80-100 wt% of the isocyanate component.
3. The polyurethane coating composition of claim 1 or claim 2, wherein the one or more aromatic isocyanates are an aromatic isocyanate prepolymer or an aromatic polyisocyanate.
4. The polyurethane coating composition of claim 3, wherein the aromatic isocyanate prepolymer is an aromatic diisocyanate, the diisocynate being a methylenediphenyl diisocyanate (MDI) or a toluene diisocyanate (TDI) or any derivatives thereof.
5. The polyurethane coating composition of claim 4, wherein the MDI has an NCO content of about 8% and is present in an amount of about 95 wt% of the isocyanate component.
6. The polyurethane coating composition of any one of claims 1-5, wherein the isocyanate component further comprises a non-reactive plasticizer in an amount of less than 20 wt% of the isocyanate component.
Date Recue/Date Received 2021-08-24
Date Recue/Date Received 2021-08-24
7. The polyurethane coating composition of any one of claims 1-6, wherein the isocyanate component further comprises an air release agent in an amount of less than 1.0 wt% of the isocyanate component.
8. The polyurethane coating composition of claim 7, wherein the air release agent is present in about 0.1 wt% of the isocyanate component.
9. The polyurethane coating composition of claim 1, wherein the polyol is present in an amount of about 55-85 wt% of the polyol component.
10. The polyurethane coating composition of any one of claims 1-9, wherein the polyol is a polypropylene glycol based polyol, a polyether polyol, a polyester polyol, or a polylcaprolactone polyol, or any combination or derivative thereof.
11. The polyurethane coating composition of claim 10, where the polypropylene glycol based polyol is polypropylene glycol polyether triol having an EW of about 2000 and is present in an amount of about 60.0 wt% of the polyol component.
12. The polyurethane coating composition of any one of claims 1-11, wherein the aromatic diamine is an aromatic thiol diamine present in an amount of about 8-35 wt% of the polyol component.
13. The polyurethane coating composition of any one of claims 1-12, wherein the moisture scavenger is a chemical or a physical moisture scavenger.
14. The polyurethane coating composition of any one of claims 1-13, wherein the catalyst is an amine based catalyst or a metal based catalyst, or any combination thereof.
15. The polyurethane coating composition of any one of claims 1-13, wherein the catalyst is imidazole.
16. The polyurethane coating composition of claim 1, wherein the polyol component further comprises an aromatic plasticizer, an air release agent, or a dye or any combination thereof.
Date Recue/Date Received 2021-08-24
Date Recue/Date Received 2021-08-24
17. A process for preparing a polyurethane coating composition under ambient conditions, the process comprising providing an isocyanate component comprising one or more aromatic isocyanates, wherein the one or more aromatic isocyanates have an isocyanate (NCO) content of 2-17%;
providing a polyol component comprising a polyol having an equivalent weight (EW) of 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst;
reacting the isocyanate component with the polyol component to produce the polyurethane composition.
providing a polyol component comprising a polyol having an equivalent weight (EW) of 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst;
reacting the isocyanate component with the polyol component to produce the polyurethane composition.
18. An article, a coating or a film, comprising the polyurethane coating composition of any one of claims 1-16.
19. A kit for a polyurethane coating composition for application under ambient conditions, the kit comprising an isocyanate component comprising one or more aromatic isocyanates, wherein the one or more aromatic isocyanates have an isocyanate (NCO) content of 2-17%;
a polyol component comprising a polyol having an equivalent weight (EW) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst; and handling instructions for making the polyurethane coating com position.
a polyol component comprising a polyol having an equivalent weight (EW) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst; and handling instructions for making the polyurethane coating com position.
20. A polyurethane based coating system for application under am bient conditions, the system comprising an isocyanate component comprising one or more aromatic isocyanates, wherein the one or more aromatic isocyanates have an isocyanate (NCO) content of 2-17%; and Date Recue/Date Received 2021-08-24 a polyol component comprising a polyol having an equivalent weight (EW) of about 1500-2500, an aromatic diamine, a moisture scavenger and a catalyst;
wherein the isocyanate component and the polyol component react to form a polyurethane based coating upon mixing the isocyanate component and the polyol component.
Date Recue/Date Received 2021-08-24
wherein the isocyanate component and the polyol component react to form a polyurethane based coating upon mixing the isocyanate component and the polyol component.
Date Recue/Date Received 2021-08-24
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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