Polyurethane Composition

Abstract

A polyurethane foam composition having reduced odor and a method for making the same are provided. The polyurethane foam composition may include (a) a multifunctional isocyanate, (b) an isocyanate-reactive composition, and (c) an amine catalyst.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to PCT Application No. PCT / CN2021 / 137719, filed December 14, 2021. The aforementioned application is incorporated herein by reference.

[0002] FIELD OF THEINVENTION The present disclosure relates generally to polyurethane compositions having reduced odor, and more particularly to polyurethane compositions useful in polyurethane foams. [Background technology]

[0003] Background technology The preparation of polyurethane (PU) or polyurea compositions by using a tertiary amine catalyst is already known in the art. Patent Document 1 discloses the use of tertiary amines as catalysts in polyurethane foam production. However, Patent Document 1 fails to identify whether there are tertiary amines capable of reducing the odor of PU foam. Patent Document 2 discloses the use of tertiary amine-terminated polyols in polyurethane foam production. However, Patent Document 2 fails to identify whether there are tertiary amine-terminated polyols capable of reducing the odor of polyurethane foam while maintaining good reactivity.

[0004] Notwithstanding the above prior art, there is a continuing need to develop polyurethane compositions useful in polyurethane foams that have good reactivity and can significantly reduce odor. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] GB1287181 [Patent Document 2] CN1898289 Summary of the Invention

[0006] It has been unexpectedly found that the compositions and methods of the present disclosure provide PU foams with reduced odor. Advantages of the PU compositions described in this disclosure include: (1) reduced odor generation; (2) good reactivity; and (3) little or no effect on the mechanical properties of the foam.

[0007] The present disclosure relates to compositions having reduced odor emissions and methods for preparing such compositions. In one embodiment, the present disclosure provides a polyurethane composition comprising: (a) a multifunctional isocyanate; (b) an isocyanate-reactive composition; and (c) a catalyst comprising a compound of the formula: [ka] During the ceremony R 1 is a methyl or ethyl group, R 2 and R 3 are individually selected from unsubstituted or substituted alkyl, alkenyl, aryl, alkylaryl, or alkoxy groups; n=1, 2, or 3; and x+y+z is between 8 and 25.

[0008] In another embodiment, the present disclosure provides a method for preparing a polyurethane composition.

[0009] In yet another embodiment, the present disclosure provides a method of using a polyurethane composition to form an interior portion of a vehicle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] When used herein, the term "comprising" and its derivatives are not intended to exclude the presence of any additional elements, steps, or procedures, whether or not they are disclosed herein. For the avoidance of any doubt, all compositions claimed herein through the use of the term "comprising" may include any additional additives, adjuvants, or compounds, unless stated to the contrary. Conversely, the term "consisting essentially of," when used herein, excludes any other elements, steps, or procedures from the scope of any succeeding recitation, unless they are essential for operability, and the term "consisting of," when used, excludes any elements, steps, or procedures not specifically delineated or listed. The term "or," unless otherwise stated, refers to the recited items individually as well as in any combination.

[0011] The articles "a" and "an" are used herein to refer to one or to more than one (i.e., to at least one) of the grammatical object of the article. By way of example, "a resin" means one resin or more than one resin.

[0012] Phrases such as "in one embodiment," "according to one embodiment," and the like generally mean that the particular feature, structure, or characteristic that follows the phrase is included in at least one embodiment of the disclosure, and may be included in more than one embodiment of the disclosure. Importantly, such phrases do not necessarily refer to the same embodiment.

[0013] Whenever "may," "can," "could," or "might" is used in this specification to describe that a certain element or feature is included or has a certain characteristic, it does not require that the particular element or feature be included or have the certain characteristic.

[0014] The present disclosure generally provides a polyurethane composition comprising: (a) a multifunctional isocyanate; (b) an isocyanate-reactive composition; and (c) a catalyst comprising a compound of the formula: [ka] During the ceremony R 1 is a methyl or ethyl group, R 2 and R 3 are individually selected from unsubstituted or substituted alkyl, alkenyl, aryl, alkylaryl, or alkoxy groups; n=1, 2, or 3; and x+y+z is between 8 and 25.

[0015] According to one embodiment, the polyfunctional isocyanate has the formula Q(NCO) m in which m is a number from 2 to 5, preferably from 2 to 3, and Q is an aliphatic hydrocarbon group having 2 to 18 carbon atoms, an alicyclic hydrocarbon group having 5 to 10 carbon atoms, an araliphatic hydrocarbon group having 8 to 13 carbon atoms, or an aromatic hydrocarbon group having 6 to 15 carbon atoms, with aromatic hydrocarbon groups generally being preferred.

[0016] Examples of polyfunctional isocyanates include, but are not limited to, ethylene diisocyanate; 1,4-tetramethylene diisocyanate; 1,6-hexamethylene diisocyanate; 1,12-dodecane diisocyanate; cyclobutane-1,3-diisocyanate; cyclohexane-1,3- and -1,4-diisocyanate and mixtures of these isomers; isophorone diisocyanate; 2,4- and 2,6-hexahydrotoluene diisocyanate and mixtures of these isomers; dicyclohexylmethane-4,4'-diisocyanate (hydrogenated MDI or HMDI); 1,3- and 1,4-phenylene diisocyanate; 2,4- and 2,6-toluene diisocyanate and mixtures of these isomers (TDI); diphenylmethane-2,4'- and / or or-4,4'-diisocyanate (MDI); naphthylene-1,5-diisocyanate; triphenylmethane-4,4',4''-triisocyanate; polyphenyl-polymethylene-polyisocyanates of the type obtainable by condensation of aniline with formaldehyde followed by phosgenation (polymeric MDI); norbornane diisocyanate; m- and p-isocyanatophenylsulfonyl isocyanate; fully chlorinated aryl polyisocyanates; modified polyfunctional isocyanates containing carbodiimide, urethane, allophonate, isocyanurate, urea or biuret groups; polyfunctional isocyanates obtained by telomerization reactions; polyfunctional isocyanates containing ester groups; and polyfunctional isocyanates containing polymeric fatty acid groups. As will be appreciated by those skilled in the art, it is also possible to use mixtures of the above polyfunctional isocyanates, preferably polymeric MDI mixtures, MDI isomer mixtures, and TDI mixtures.

[0017] In another embodiment, prepolymers of MDI or TDI can also be used as a substitute for MDI or TDI. The prepolymers of MDI or TDI are prepared by reacting MDI or TDI with a multifunctional polyol. Methods for synthesizing prepolymers of MDI or TDI are known in the art (e.g., Polyurethanes Handbook 2003, pp. 211-215, 2003). nd(see G. Oertel, 1994).

[0018] Isocyanate-reactive compositions suitable for use in the present disclosure can include multifunctional polyols or multifunctional amines.

[0019] The multifunctional polyols used in the present disclosure include, but are not limited to, polyether polyols, polyester polyols, bio-renewable polyols, polymer polyols, non-flammable polyols, such as phosphorus-containing polyols or halogen-containing polyols. Such polyols can be used alone or in appropriate combinations as mixtures. The general functionality of the multifunctional polyols used in the present disclosure is 2-6. The polyol molecular weight can be in the range of 200-10,000, preferably 400-7,000. The molecular weight (MW) is the weight average molecular weight, which is the weight average molecular weight of the standard. It is identified by gel permeation chromatography (GPC) using polystyrene as a matrix.

[0020] The proportion of the polyfunctional polyol is generally in the range of 10% to 90% by weight, preferably 30% to 80% by weight, based on the polyurethane composition.

[0021] Polyether polyols for use in the present disclosure include alkylene oxide polyether polyols, such as ethylene oxide polyether polyols and propylene oxide polyether polyols, and copolymers of ethylene and propylene oxide having terminal hydroxyl groups from polyhydric compounds, including diols and triols, such as ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, pentaerythritol, glycerol, diglycerol, trimethylolpropane, and similar low molecular weight polyols.

[0022] Polyester polyols for use in the present disclosure include, but are not limited to, those produced by the reaction of a dicarboxylic acid with an excess of a diol, such as adipic acid with ethylene glycol or butanediol, or by the reaction of a lactone with an excess of a diol, such as caprolactone with propylene glycol. Polyester polyols for use in the present disclosure may also include: linear or lightly branched aliphatic (predominantly adipate) polyols with terminal hydroxyl groups; low molecular weight aromatic polyesters; polycaprolactones; polycarbonate polyols. Linear or lightly branched aliphatic (mainly adipate) polyols with terminal hydroxyl groups are produced by reacting dicarboxylic acids with excess diols, triols, and mixtures thereof; such dicarboxylic acids include, but are not limited to, adipic acid, AGS mixed acids; such diols and triols include, but are not limited to, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, glycerol, trimethylolpropane, and pentaerythritol. Low molecular weight aromatic polyesters include products derived from the process bottoms of dimethyl terephthalate (DMT) production (also commonly referred to as DMT still bottoms), products derived from glycolysis of recycled poly(ethylene terephthalate) (PET) bottles or magnetic tapes and subsequent reesterification with diacids or reaction with alkylene oxides, and products derived from directed esterification of phthalic anhydride. Polycaprolactone is produced by ring-opening of caprolactone in the presence of an initiator and a catalyst, such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, glycerol, trimethylolpropane, and pentaerythritol.Polycarbonate polyols are derived from carbonic acid, which can be produced through the polycondensation of a diol (commonly hexanediol) with phosgene, but also through the transesterification of a diol with a carbonate ester (eg, diphenyl carbonate).

[0023] Bio-renewable polyols suitable for use in the present disclosure include castor oil, sunflower oil, palm kernel oil, palm oil, canola oil, rapeseed oil, soybean oil, corn oil, peanut oil, olive oil, algae oil, and mixtures thereof.

[0024] Examples of multifunctional polyols include, but are not limited to, graft polyols or polyurea modified polyols. Graft polyols include triols in which vinyl monomers are graft copolymerized. Suitable vinyl monomers include, for example, styrene, or acrylic. Polyurea modified polyols are polyols containing a polyurea dispersion formed by reacting a diamine and a diisocyanate in the presence of a polyol. A modified form of the polyurea modified polyol is the polyisocyanate polyaddition (PIPA) polyol, which is formed by the in situ reaction of an isocyanate in the polyol with an alkanolamine.

[0025] The non-flammable polyols can be, for example, phosphorus-containing polyols obtained by addition of alkylene oxides to phosphoric acid compounds. The halogen-containing polyols can be, for example, those obtained by ring-opening polymerization of epichlorohydrin or trichlorobutylene oxide.

[0026] The polyfunctional amines used in the present disclosure can include polyether polyamines or polyester polyamines.

[0027] In a preferred embodiment, the isocyanate-reactive composition is a polyether polyol.

[0028] Many compounds that can be used to reduce emissions in the formation of polyurethane foams have been found to be ineffective at reducing odor. However, it has been found that the addition of component (c) as shown above to the polyurethane composition of the present disclosure reduces odor generation.

[0029] Component (c) is used as a catalyst in the formation of polyurethane foam. Suitable catalysts for use in the reactive compositions of the present invention include amine catalysts based on the polyetheramine structure of the following formula: [ka] During the ceremony R 1 is a methyl or ethyl group, R 2 and R 3 are individually selected from unsubstituted or substituted alkyl, alkenyl, aryl, alkylaryl, or alkoxy groups; n=1, 2, or 3, and x+y+z is between 8 and 25.

[0030] In an embodiment of the present disclosure, the compound of formula (I) can be prepared by methylation of polyetheramine. Examples of polyetheramine include Huntsman Corporation's polyetheramine products, such as polypropylene glycol bis(aminopropyl)ether (Jeffamine® D230 amine, Jeffamine® D400 amine, Jeffamine® D1000 amine, and Jeffamine® D2000 amine), 2-[2-(2-aminoethoxy)ethoxy]ethylamine (Jeffamine® EDR148 amine), 1,2-bis(3-aminopropoxy)ethane (Jeffamine® EDR176 amine), and poly(oxyethylene-oxypropylene)bis(aminopropyl)ether (Jeffamine® ED600 amine, Jeffamine® ED900 amine, and Jeffamine® ED2003 amine), addition of polyetheramine or polyethyleneamine with urea or guanidine compound. for example, amines obtained by the reaction of guanidine with TETA, as well as amines obtained by the Michael addition reaction of alcohol-containing or amino-containing tertiary amines followed by hydrogenation, for example, amines obtained by the reaction of DMAPA with acrylonitrile followed by hydrogenation, and amines obtained by the reaction of DMEA (dimethylaminoethanol) with acrylonitrile followed by hydrogenation.

[0031] In another embodiment, trifunctional methylated polyetheramine can also be used as an alternative to difunctional methylated polyetheramine. Trifunctional methylated polyetheramine is prepared by methlation of trifunctional polyetheramine. The synthesis method of trifunctional methylated polyetheramine is known in the art and is similar to the synthesis method of difunctional methylated polyetheramine. The preferred molecular weight of trifunctional methylated polyetheramine is 300-3000, more preferably 600-1000.

[0032] The ratio of component (b) to component (c) in the polyurethane composition, expressed as a weight percentage, is an amount ranging from about 10:1 to about 2000:1, preferably from about 20:1 to about 1500:1, and more preferably from about 50:1 to about 1000:1.

[0033] According to one embodiment, the NCO index of the polyurethane composition ranges from 0.6 to about 4, preferably from about 0.7 to about 1.3. Isocyanate index or NCO index or index is the ratio of NCO groups to isocyanate-reactive hydrogen atoms present in the formulation, as shown by the equation (1) [NCO] / [active hydrogen]. In other words, NCO index represents the amount of isocyanate actually used in the formulation, relative to the amount of isocyanate theoretically required to react with the amount of isocyanate-reactive hydrogen used in the formulation.

[0034] In another embodiment, the polyurethane composition may further optionally include flame retardants, antioxidants, surfactants, physical or chemical blowing agents, chain extenders, crosslinkers, foam stabilizers, fillers, pigments, or any other typical additives used in PU materials.

[0035] Advantages of the compositions of the present disclosure include: (1) reduced odor generation; (2) good reactivity; and (3) no apparent effect on the mechanical properties of the foam.

[0036] The present disclosure also provides a method for producing a polyurethane composition, the method including mixing component (b) and component (c) to form a mixture, and adding the mixture to component (a).

[0037] Furthermore, the present disclosure also provides methods of using the polyurethane compositions to form interior parts of vehicles, preferably automotive interior cladding, such as roof cladding, carpet backing foam, door cladding, steering rings, control knobs, and seat cushioning.

[0038] The embodiments of the present disclosure are also applicable to other industrial fields where PU foams are used, such as furniture, bedding, construction, footwear, etc. PU foams include flexible PU foams, semi-rigid PU foams, rigid PU foams, viscoelastic PU foams, integral skin PU foams, hydroponic PU foams, etc. EXAMPLES

[0039] The examples which follow are to be considered as illustrative of the present disclosure and not limiting of the present disclosure in any way.

[0040] raw materials Polyfunctional isocyanate: a mixture of 80 parts by weight of DESMODUR® T 80 TDI (sold by Covestro) and 20 parts by weight of SUPRASEC® 5005 polymeric MDI (sold by Huntsman Corporation, USA); Polyol A: NJ-360V polyether polyol, OH number 28 mg KOH / g (sold by Ningwu New Material Development Co., China); Polyol B: KONIX® KE-880S polyether polyol, OH number 20 mg KOH / g (sold by KPX, Korea); Foam stabilizer: TEGOSTAB® B8738 LF2 polymer additive (siloxane-based surfactant). (Available from Evonik); Blowing agent: JEFFCAT® ZF-10 catalyst (N,N,N′-trimethyl-N′-(2-hydroxyethyl)bis(2-aminoethyl)ether) (sold by Huntsman Corporation, USA); Chain extender: diethanolamine (DEOA); PPG-600: Polypropylene glycol, molecular weight 600; Catalyst G: JEFFCAT® DPA catalyst (N,N-dimethyl-N',N'-di(2-hydroxypropyl)-1,3-propylenediamine) (Distributor: Huntsman Corporation, USA); Catalyst H: RZETA® HD catalyst (1,4-diazabicyclo[2.2.2]octane-2-methanol) (Distributor: Tosoh, Japan).

[0041] Preparation of polyetheramine A In a 600 ml reactor equipped with a mechanical stirrer, thermometer, and reflux condenser, PPG-600, Raney nickel, aqueous ammonia, and hydrogen were mixed in a ratio of 1:0.01:10:5 (molar basis of molecules) at 200° C. and a total pressure of 150 bar. The mixture was stirred for an additional 10 hours. The reaction mixture was subjected to vacuum at 90° C. under 10 torr for about 2 hours until the amine value was less than 3.36 meq / g, to obtain a polyetheramine.

[0042] Preparation of catalysts A to F In a 600 ml autoclave equipped with a mechanical stirrer, a thermometer, and a reflux condenser, polyetheramine, Raney nickel, formaldehyde, and hydrogen were mixed in a ratio of 1:0.01:6:10 (molar basis of molecules) at 120° C. and a total pressure of 10 bar. The mixture was stirred for another 4 hours and digested for 4 hours. The reaction mixture was subjected to vacuum at 110° C. for about 6 hours to obtain the catalyst of the present invention.

[0043] The polyetheramines used in the preparation of catalysts A to F have the structure of formula (I):

[0044] [ka]

[0045] In the formula, R 1 , R 2 , R 3 , x, y, and z are defined in Table 1: [Table 1]

[0046] Examples 1 to 12: A multifunctional isocyanate was used as Component A to produce Examples 1-12. Component B for Examples 1-12 is shown in Table 2. All values ​​listed in Table 2 refer to parts by weight of Component B. As shown in Table 2, Examples 1 and 2 were comparative examples containing a catalyst not according to the present disclosure. Examples 7 and 8 were comparative examples containing a lower molecular weight catalyst than that of the present disclosure. Example 12 is a comparative example containing a higher molecular weight catalyst than that of the present disclosure. [Table 2]

[0047] procedure For Examples 1-12, components A and B were mixed in a polyethylene container in a ratio of A:B=43:100 (by weight) and an index of 1.05, and stirred to form a polyurea / polyurethane foam. The resulting foam composition was rapidly poured into a polyethylene bag. As the foam-forming reaction proceeded, the foam was allowed to rise freely. The foam was allowed to solidify at room temperature for a minimum of 15 minutes before testing. For each formulation, approximately 1 kilogram (kg) of foam was made by hand-mix foam procedure for VDA270 odor testing and VDA278 emission testing. The test chamber temperature during odor testing was 80° C. The test chamber temperature during emission testing was 90° C. in VOC and 120° C. in Fog. VDA270 (2018 / 06 edition) and VDA278 (2016 / 05 edition) are test methods of the Verband der Automobilindustrie (website: https: / / www.vda.de / de).

[0048] result PU foam odor panel [Table 3]

[0049] 1) Tested according to VDA270 Odor Test Method VDA-270 The test vessels are placed inside the test chamber and subjected to a specified temperature for a defined period of time. Sample materials are assigned a number based on their location in the vehicle and placed inside an odor-neutral, closed test vessel. No. 1 and 2: Add 50 ml of deionized water to the test vessel, remove from the chamber and evaluate immediately; No. 3: No water is added to the test vessel and it is cooled to a temperature of (60±5)°C before evaluation. After evaluation of the three samples, the containers are stored again at a temperature of (80±2)°C before evaluating the other samples. The judge smells the odor and evaluates the intensity of the odor 5. It is subject to evaluation using a six-point scale ranging from imperceptible to unacceptable. Notes: 1 = not perceptible, 2 = perceptible but not noticeable, 3 = clearly perceptible but not noticeable, 4 = noticeable, 5 = very noticeable, 6 = intolerable

[0050] Table 3 shows the odor generation for Examples 1-8 when tested according to the VDA270 emission test. As shown in Table 3, when a methylated polyetheramine catalyst is present in the PU foam composition (Examples 3-8), odor generation is significantly reduced.

[0051] physical properties [Table 4]

[0052] 2) Tested according to ASTM D3574 ASTM D3574 is the Standard Test Methods for Flexible Cellular Materials-Slab, Bonded, and Molded Urethane Foams published by ASTM International. ASTM International is an international standards organization formerly known as the American Society for Testing and Materials. These test methods apply to slab, bonded, and molded products of flexible cellular materials known as urethane foams. Urethane foams are generally defined as expanded cellular products formed by the interaction of active hydrogen compounds, water, and isocyanates. Dry compression set is tested by a compression apparatus consisting of two or more flat plates fixed parallel to each other by bolts or clamps, with the space between the plates being adjustable by spacers to the required deflection thickness. The specimen is placed in the apparatus, the specimen is deflected to 50±1% of its thickness, the deflected specimen and apparatus are placed in a mechanical convection air oven at 70°C and a maximum relative humidity of 6% for 22 hours, and then the apparatus is removed. The specimen is immediately removed from the apparatus and the specimen is allowed to recover for 30-40 minutes before the final thickness is measured.

[0053] Table 4 shows the physical properties of Examples 1, 4, 6 to 9. Even in the presence of the catalysts described in this disclosure (Examples 4, 6, and 9), there is no obvious effect on the mechanical properties of the foam.

[0054] Amine Release [Table 5]

[0055] 3) Tested according to VDA278 VDA 278 Thermal Desorption Analysis of Organic Emissions for the Characterization of Non-Metallic Materials for Automobiles. Materials are characterized with regard to the type and amount of organic substances released therefrom. In this method, two semi-quantitative cumulative values ​​are determined, which allow the emission of volatile organic compounds (VOC value) and the proportion of condensable substances (FOG value) to be estimated. Furthermore, single substance emissions (e.g. amine emissions) are determined. During the analysis, samples are thermally extracted and the emissions are separated by gas chromatography and detected by mass spectrometry. The volatile organic compounds are released at 90°C and the condensable substances at 120°C.

[0056] Table 5 shows the amine emissions for Examples 4, 6, 7, and 8 when tested according to the VDA278 emission test. Examples 4 and 6 of the present disclosure show reduced amine emissions over Examples 7 and 8 (which contain catalysts with lower molecular weights than those made according to the present disclosure).

[0057] Reactivity of PU foam [Table 6]

[0058] 4) Creaming time is defined as the time from preparation of the reaction mixture until it is observed to begin to become a foamed mixture. Top of cup time is defined as the time from preparation of the reaction mixture until the foam height reaches the top of the cup. The string gel time is defined as the time from preparation of the reaction mixture to reaching a transition from a fluid to a solid phase. The rise time is defined as the time from preparation of the reaction mixture until the foam height no longer grows. All of the above were evaluated visually. Tack-free time is defined as the time from preparation of the foam reaction mixture until the foam surface becomes tack-free.

[0059] Table 6 shows the reactivity of the PU foams of Examples 1, 7 to 12. Example 12, which contains a catalyst with a higher molecular weight than that of the present disclosure, shows very poor reactivity.

[0060] From the above, it is apparent that the present disclosure attains the advantages mentioned herein as well as those inherent therein. While illustrative embodiments of the disclosure have been described for purposes of disclosure, it will be appreciated that numerous modifications may be made, which will be readily suggested to those skilled in the art, and which can be effected without departing from the scope of the disclosure and the appended claims.

Claims

1. 1. A polyurethane composition comprising: (a) a polyfunctional isocyanate; (b) an isocyanate-reactive composition; and (c) a catalyst comprising a compound of the formula: 【Chemistry 1】 During the ceremony, R 1 is a methyl or ethyl group, R 2 and R 3 are individually selected from unsubstituted or substituted alkyl, alkenyl, aryl, alkylaryl, or alkoxy groups; n=1, 2, or 3, and x+y+z is between 8 and 25; The polyurethane composition.

2. 10. The polyurethane composition of claim 1, wherein the polyurethane composition has an NCO index in the range of about 0.6 to about 4, and preferably, the NCO index is in the range of about 0.7 to about 1.

3.

3. 3. The polyurethane composition of claim 1 or 2, wherein the multifunctional isocyanate is selected from polymeric methylene diphenyl diisocyanate, an isomeric mixture of methylene diphenyl diisocyanate, an isomeric mixture of toluene diisocyanate, and mixtures thereof.

4. 3. The polyurethane composition of claim 1 or 2, wherein the isocyanate-reactive composition comprises a multifunctional polyol or a multifunctional amine, preferably the isocyanate-reactive composition comprises a multifunctional polyol, more preferably the multifunctional polyol is a polyether polyol.

5. R 2 and R 3 The polyurethane composition of claim 1 or 2, wherein: is individually selected from a methyl group or an ethyl group.

6. 3. The polyurethane composition of claim 1, wherein n=1.

7. 3. The polyurethane composition of claim 1, wherein n=2 or 3.

8. 3. The polyurethane composition according to claim 1, wherein x+y+z is 8 to 15.

9. 3. The polyurethane composition of claim 1, wherein the ratio of component (b) to component (c), expressed as weight percentage, in the polyurethane composition is in an amount ranging from about 10:1 to about 2000:1, preferably the ratio of component (b) to component (c), expressed as weight percentage, in the polyurethane composition is in an amount ranging from about 20:1 to about 1500:1, and more preferably the ratio of component (b) to component (c), expressed as weight percentage, in the polyurethane composition is in an amount ranging from about 50:1 to about 1000:

1.

10. 3. The polyurethane composition of claim 1, further comprising at least one chain extender.

11. 11. The polyurethane composition of claim 10, further comprising one or more of a flame retardant, an antioxidant, a surfactant, a physical or chemical blowing agent, a crosslinking agent, a foam stabilizer, a filler, or a pigment.

12. 3. A method for producing the polyurethane composition of claim 1 or 2, comprising mixing component (b) and component (c) to form a mixture, and mixing the mixture with component (a).

13. 13. The method of claim 12, wherein component (a) comprises TDI, polymeric MDI, or a mixture thereof, and component (b) comprises a polyether polyol.

14. A method for reducing odor of polyurethane foam, comprising: (a) a polyfunctional isocyanate; (b) an isocyanate-reactive composition; (c) reacting in the presence of a catalyst comprising a compound of the formula: 【Chemistry 2】 During the ceremony R 1 is a methyl or ethyl group, R 2 and R 3 are individually selected from unsubstituted or substituted alkyl, alkenyl, aryl, alkylaryl, or alkoxy groups; n=1, 2, or 3, and x+y+z is between 8 and 25; The method.

15. 3. Use of the polyurethane composition of claim 1 or 2 to form the interior of a vehicle.

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