KR20190073672A - Eco-friendly polyurethane composition amd its preparing method - Google Patents

Abstract

The present invention relates to: a polyurethane composition which is eco-friendly and has excellent tensile strength, elongation rates, hardness characteristics and the like by not comprising four harmful heavy metals which are environment regulation materials, a phthalate-based plasticizer, and also 4,4′-methylenebis(2-chloroaniline) (MOCA); and a method for manufacturing the same.

Description

TECHNICAL FIELD [0001] The present invention relates to an eco-friendly polyurethane composition,

The present invention relates to an environmentally friendly polyurethane composition composed of a two-pack type of a prepolymer part and a curing agent, and a method for producing the same.

The polyurethane has characteristics of being resistant to acid, alkali, oil resistance, abrasion resistance, low temperature characteristics, excellent tensile strength and shock absorbability by elasticity, and is relatively inexpensive and easy to construct, Such as elastic packaging materials, polyurethane waterproofing materials, and polyurethane flooring, which are closely related to daily life.

However, in the polyurethane composition used in these facilities, the four hazardous heavy metals such as lead, chromium, mercury, and cadmium have been detected several tens times higher than the standard value, and the controversy over human harm has been raised.

Here, the polyurethane composition collectively refers to a polymer composition having a urethane bond, which is produced by chemical bonding of an alcohol group (-OH) and an isocyanate group (-NCO) to form a urethane bond and curing. The two-pack type polyurethane composition is composed of a two-pack type of a prepolymer part and a curing agent, and separates the main part and the curing agent part separately And they are manufactured so as to be mixed and used in the step of using them.

Conventionally, a phthalate plasticizer has been used as a main component of the two-pack type polyurethane composition. The phthalate plasticizer is classified as an environmental hormone and is currently prohibited from being used domestically or locally. And the like.

Further, MOCA (4,4'-Methylenebis (2-chloroaniline)) was mainly used as a chain extender in the curing agent portion of the two-pack type polyurethane composition to improve mechanical properties such as tensile strength, hardness and tensile strength . However, MOCA has been designated as a harmful chemical substance as a carcinogen. Also, a mixture containing 0.1% or more of MOCA has been designated as a harmful chemical substance, and thus, there are many restriction factors for use in manufacturing and construction sites.

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a fuel cell which does not contain the four harmful heavy metals and the phthalate plasticizer which are environmental regulatory substances and further contains MOCA (4,4'-Methylenebis (2-chloroaniline) And having properties such as tensile strength, elongation percentage, and hardness to the same extent, and a process for producing the same.

In order to achieve the above object, the present invention provides a method for producing an environment-

[1] a prepolymer part having an isocyanate group content of 4 to 6% by weight,

A polyol having a weight average molecular weight of 500 to 5000, an average number of functional groups of 2 to 3, and a curing agent

In a process for producing a two-pack type polyurethane composition,

Wherein the chain extender is a mixture of DMTDA (Dimethyl Thio Toluene Diamine) and an epoxy-modified polyol containing a hydroxyl group, a process for producing a two-component environmentally friendly polyurethane composition,

[2] The process according to [1], wherein the subject and the curing agent are mixed at a ratio of NCO equivalents of the subject: OH equivalent ratio of the curing agent = 1.1 to 1.3 and a weight ratio of the subject to the curing agent of 1: A method for producing a two-pack type environmentally friendly polyurethane composition,

[3] The polyol as set forth in [1], wherein the polyol is a polyol in an equivalent ratio of diol: triol: 1,3-butylene glycol = 1: 0.8 to 1.3: A method for producing an environmentally friendly polyurethane composition,

[4] The curing agent according to any one of [1] to [4], wherein the curing agent comprises 20 to 40% by weight of a polyol having a molecular weight of 500 to 5000, an average number of functional groups of 2 to 3, 1 to 3% by weight of a chain extender, 0.5 to 2% by weight of a bismuth- 2 to 10% by weight of a plasticizer, and residual carbon as a balance,

A method for producing a two-pack type environmentally friendly polyurethane composition according to [1], characterized in that the viscosity at 23 캜 is 3000 cP, 23 캜 to 9000 cP, 23 캜, and the pot life is 40 minutes to 100 minutes.

[5] The process for producing a two-pack type environmentally friendly polyurethane composition according to [1], wherein the equivalent ratio of DMTDA: hydroxyl group-containing epoxy-modified polyol of the chain extender is 1:

[6] The method for producing a two-pack type environmentally friendly polyurethane composition according to [1], wherein the chain extender is mixed at 0.41 to 1.13 with respect to the polyol equivalent,

[7] The process for producing a two-pack environmentally friendly polyurethane composition according to [1], wherein the subject has a viscosity at 23 ° C of 2000 cP, 23 ° C to 8000 cP, and 23 ° C,

.

Further, the present invention is an eco-friendly polyurethane composition produced by the method according to any one of [1] to [7] above.

Further, the present invention is an eco-friendly polyurethane elastic packaging material produced from a polyurethane composition produced by the method described in any one of [1] to [7] above.

According to the present invention, it is possible to replace MOCA, which is used as a conventional chain extender, with four environmentally harmful heavy metals and no phthalate plasticizer, and to replace it with an environmentally friendly substance, It is possible to provide an environmentally friendly polyurethane composition having physical properties such as strength, elongation and hardness, and a method for producing the same.

Hereinafter, embodiments of the present invention will be described in detail. However, even if it is indispensable to implement the present invention, a detailed description of a configuration that can be readily implemented by a general technician from known technologies will be omitted.

A method for producing a polyurethane composition according to an embodiment of the present invention comprises:

A prepolymer part having an isocyanate group content of 4 to 6% by weight,

A polyol having a weight average molecular weight of 500 to 5000, an average number of functional groups of 2 to 3, and a curing agent

In a process for producing a two-pack type polyurethane composition,

The chain extender is a mixture of dimethyl thio toluene diamine (DMTDA) and an epoxy-modified polyol containing a hydroxyl group.

That is, according to the present invention, MOCA, widely used for increasing the elongation, tensile strength and hardness, particularly hardness, of a polyurethane composition in a conventional method for producing a polyurethane composition, is a carcinogen that can cause cancer in a worker , And environmental hormones. In addition, the use of compounds containing four harmful heavy metals such as lead and phthalate-based plasticizers has the disadvantage that they are not environmentally friendly. Therefore, these harmful substances The present invention provides a method of obtaining a polyurethane composition having physical properties such as tensile strength, elongation, hardness, and the like to the same degree without using them.

To this end, in the present invention, an environmentally-friendly plasticizer is used without using a compound containing four harmful heavy metals, and the isocyanate group content (NCO%) of the main portion is controlled, By using a specific chain extender, it is characterized in that it is possible to produce a polyurethane composition which is eco-friendly and has excellent physical properties such as elongation, tensile strength, hardness, and yellowing property because no harmful substances are used.

First, the subject portion of the polyurethane composition according to one embodiment of the present invention is characterized by having an isocyanate group content of 4 to 6% by weight. When the content of the isocyanate groups in the subject is less than 4% by weight, the content of the chain extender is lowered as described later, and the tensile strength and hardness of the polyurethane composition are inferior and the isocyanate group content is more than 6% , The content of the chain extender is increased and the elongation rate is lowered.

In the present specification, " ~ " means values of " above " and " below " For example, "A to B" means A or more and B or less.

The subject matter can be prepared by reacting a diisocyanate with a polyol having an isocyanate group content of 4 to 6% by weight until the isocyanate group content in the subject is 5.0 ± 1% by weight. Here, the polyol and diisocyanate are not particularly limited as long as they can react with each other to form a subject having an isocyanate group content of 4 to 6% by weight.

As the polyol, known compounds such as polyhydric alcohols, polyether polyols, and polyester polyols can be used. More specifically, examples of polyhydric alcohols include ethylene glycol (EG), diethylene glycol (DEG), propylene glycol (PG), dipropylene glycol (DPG), 1,3-butylene glycol (1,3- , 1,4-butylene glycol (1,4-BG); Triols such as glycerol, 1,1,1-trimethylol propane (TMP) and 1,2,5-hexanetriol; And polyhydric alcohols having four or more hydroxyl groups in the molecule such as glucose and sorbitol.

Examples of the polyether polyols include polyether polyols obtained by adding one or more kinds of oxides selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, and the like to the above-mentioned polyhydric alcohols, and tetrahydrofuran And poly (tetramethylene ether) glycol (PTMEG) obtained together.

Examples of the polyester polyols include at least one kind selected from the group consisting of ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, glycerol, trimethylolpropane, and other low-molecular-weight polyols and at least one kind selected from the group consisting of glutaric acid, adipic acid, , Isophthalic acid, dimer acids and the like, or at least one acid selected from the group consisting of other low molecular weight dicarboxylic acids and oligomeric acids, and a polyester polyol obtained by ring-opening polymerization of caprolactone And the like.

Further, the polyol preferably contains a diol, a triol and 1,3-butylene glycol (1,3-BG), and from the viewpoint of obtaining excellent tensile strength, hardness and elongation, , Triol and 1,3-BG are mixed in an equivalent ratio of 1: 0.8 to 1.3: 1 to 2, respectively. The polyol preferably has a weight average molecular weight of 500 to 5,000.

Examples of the diisocyanate include 2,4-toluene diisocyanate (TDI), 4,4'-diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), 1,4-phenyl (HDDI), 1,4-phenylene diisocyanate, 1,4-cyclohexane diisocyanate, 4,4'-dicyclohexylmethane diisocyanate (HMDI), naphthalene diisocyanate, xylene diisocyanate Aliphatic and aromatic diisocyanates can be used. From the viewpoint of reactivity, TDI, MDI and the like are more preferable, and the diisocyanate may be used alone or in a mixture of two or more.

Furthermore, the above-mentioned subject matter relates to a process for producing polyisocyanate by reacting toluene diisocyanate with a diol, a triol and a 1,3-BG mixed polyol until the isocyanate group content of the subject is 4 to 6% by weight desirable.

In addition to the polyol and the diisocyanate, the subject may further include a plasticizer, an additive and the like, if necessary. The plasticizer is not particularly limited as long as it is a nonphthalate-based environmentally friendly plasticizer that does not contain phthalate. For example, a single substance selected from the group consisting of ester-based, carboxylate-based, aliphatic-based and benzoate-based plasticizers, or a mixture containing two or more thereof may be used. The plasticizer is preferably contained in an amount of 2 to 10% by weight. If the content of the plasticizer is less than 2% by weight, the effect of the plasticizer is not sufficiently exhibited. If the content of the plasticizer exceeds 10% by weight, desired properties are obtained in terms of tensile strength, elongation, There may be a problem that it is absent.

The additive is not particularly limited as long as the effects of the present invention are not significantly impaired. Specific examples thereof include antifoaming agents, antioxidants, and reaction control agents, and additives commonly used in the art can be used. The additive is preferably added in an amount of 0.01 to 1 part by weight for enhancing physical properties and harmonizing the whole components.

The above-mentioned subject matter preferably has an isocyanate group content of 4 to 6% by weight and a diol: triol: 1,3-butylene glycol (1,3-BG) ratio of 1: 0.8 to 1.3 : 1 to 2, further comprising 2 to 10% by weight of a plasticizer and 0.01 to 1% by weight of an additive.

Further, it is preferable that the above-mentioned subject has a viscosity at 23 ° C of 2000 cP, 23 ° C to 8000 cP, and 23 ° C.

The curing agent of the polyurethane composition according to one embodiment of the present invention is characterized by containing a polyol having a weight average molecular weight of 500 to 5000 and an average number of functional groups of 2 to 3 and a chain extender.

Here, the polyol is not particularly limited as long as it is a polyol having a weight average molecular weight of 500 to 5000 and an average number of functional groups of 2 to 3. When the molecular weight of the polyol is less than 500 or the average number of functional groups is less than 2, there may be a problem that tensile strength and hardness are lowered. On the contrary, when the molecular weight of the polyol is more than 5000 or the average number of functional groups is more than 3, There may be a problem that the surface is roughened and the elongation rate is lowered.

As the polyol, known compounds such as polyhydric alcohols, polyether polyols, and polyester polyols can be used without any particular limitation.

More specifically, examples of polyhydric alcohols include ethylene glycol (EG), diethylene glycol (DEG), propylene glycol (PG), dipropylene glycol (DPG), 1,3-butylene glycol (1,3- , 1,4-butylene glycol (1,4-BG); Triols such as glycerol, 1,1,1-trimethylol propane (TMP) and 1,2,5-hexanetriol; And polyhydric alcohols having four or more hydroxyl groups in the molecule such as glucose and sorbitol.

Examples of the polyether polyols include polyether polyols obtained by adding one or more kinds of oxides selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, and the like to the above-mentioned polyhydric alcohols, and tetrahydrofuran And poly (tetramethylene ether) glycol (PTMEG) obtained together.

Examples of the polyester polyols include at least one kind selected from the group consisting of ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, glycerol, trimethylolpropane, and other low-molecular-weight polyols and at least one kind selected from the group consisting of glutaric acid, adipic acid, , Isophthalic acid, dimer acids and the like, or at least one acid selected from the group consisting of other low molecular weight dicarboxylic acids and oligomeric acids, and a polyester polyol obtained by ring-opening polymerization of caprolactone And the like.

The polyol is preferably contained in an amount of 20 to 40% by weight in the curing agent. When the content of the polyol is within the above range, it is excellent in terms of mechanical strength, elongation, and the like.

The chain extender is used to improve the mechanical strength of the cured product through the extension of the molecular structure. MOCA has been used in the production of polyurethane compositions in the past, but MOCA is a fatal carcinogen, As a disadvantage, mixtures containing MOCA in excess of 0.1% are designated as hazardous chemicals. In the present invention, in order to solve the above-mentioned disadvantages and to provide a polyurethane composition which is environmentally friendly and has excellent physical properties, a mixture of DMTDA (Dimethyl Thio Toluene Diamine) and an epoxy-modified polyol containing a hydroxyl group . In the case of using only DMTDA as a chain extender, there was a problem that hardness was low and yellowing was severe compared with the case of using MOCA. On the other hand, when only an epoxy-modified polyol containing a hydroxyl group is used as the chain extender, there is a problem that the tensile strength and elongation are poor. Thus, the present inventors have found that when the above-mentioned curing agent is used in combination with DMTDA and an epoxy-modified polyol containing a hydroxyl group as a chain extender at a predetermined ratio, excellent tensile strength, elongation, Sulfur, and the like can be obtained.

The epoxy-modified polyol containing the hydroxyl group can be used regardless of the specific kind thereof. Representative examples thereof include YU-300 of Kukdo Chemical Co., Ltd.

Particularly, in the present invention, it is preferable that the chain extender is mixed at a ratio of 0.41 to 1.13 based on the polyol equivalent, from the viewpoint of obtaining good balance of physical properties such as tensile strength, elongation, hardness and sulfur modification of the obtained polyurethane composition Do.

The chain extender can be obtained by mixing DMTDA and an epoxy-modified polyol containing a hydroxyl group in an equivalent ratio of 1: 0.1 to 0.3, more preferably 1: 0.1 to 0.2 The polyurethane composition is preferable from the viewpoint of good balance of physical properties such as tensile strength, elongation, hardness, and yellowing.

The curing agent preferably has a weight average molecular weight of 500 to 5000, 20 to 40 wt% of a polyol having an average functional group of 2 to 3, 1 to 3 wt% of a chain extender, 0.5 to 2 wt% of a bismuth catalyst, %, A plasticizer in an amount of 2 to 10% by weight, and a residual amount of carbon. The curing agent preferably has a viscosity of 3000 cP, 23 ° C to 9000 cP, and 23 ° C. The curing agent preferably has a curing time of 40 minutes to 100 minutes, more preferably 40 minutes to 80 minutes.

The above-mentioned bismuth-based catalyst can provide environmentally friendly and sufficient mechanical properties to the polyurethane composition to be produced. As the bismuth-based catalyst, for example, a catalyst containing a bismuth compound such as bismuth octoate, bismuth naphthenate or bismuth propionate can be used. The bismuth-based catalyst is preferably contained in an amount of 0.5 to 2% by weight in terms of mechanical properties and working time.

The pigment serves as a colorant, and known organic or inorganic pigments such as titanium dioxide (TiO ₂ ), carbon black, phthalocyanine blue, diazo red and the like can be used. By including such pigment in an amount of 1 to 3% by weight in the curing agent, a desired color can be realized. When the pigment is used in an amount of less than 1% by weight, there is a possibility that a desired color can not be sufficiently imparted. When the pigment content is more than 3% by weight, tensile strength, elongation, hardness The desired excellent physical properties can not be obtained.

The plasticizer is not particularly limited as long as it is a nonphthalate-based environmentally friendly plasticizer containing no phthalate. For example, a single substance selected from the group consisting of ester-based, carboxylate-based, aliphatic-based and benzoate-based plasticizers, or a mixture containing two or more thereof may be used. The plasticizer is preferably contained in an amount of 2 to 10% by weight. If the content of the plasticizer is less than 2% by weight, the effect of the plasticizer may not be sufficiently manifested. If the content exceeds 10% by weight, the desired properties such as tensile strength, elongation, Can not be obtained.

In the above, the heavy carbon acts as an inorganic filler in the resin and functions to increase the volume of the resin.

In the method for producing a polyurethane composition comprising a mixture of the subject and a curing agent according to an embodiment of the present invention, it is preferable that the NCO equivalent of the subject and the OH equivalent of the curing agent are 1.1 to 1.3, It is also preferable that the weight ratio of the subject to the curing agent is 1: 2 to 3.5. This makes it possible to produce the environmentally friendly polyurethane composition of the present invention. More specifically, it is more preferable that the NCO equivalent of the subject: OH equivalent ratio of the curing agent is 1.1 to 1.2, and the weight ratio of the subject to the curing agent is 1: 2 to 3. Here, when the ratio of the NCO equivalent of the subject to the OH equivalent of the curing agent and / or the weight ratio of the subject to the curing agent is out of the above range, the curing is not performed well, the working time is too short, or too little There can be a problem of lengthening. When the work time is too short, there is a problem that when the work is performed in a large area, it is hardened too quickly to form a continuous surface, and if the work time is too long, the work takes a lot of time Is also undesirable.

According to another embodiment of the present invention, there is provided an environmentally friendly polyurethane composition produced by the above-described process for producing an environmentally friendly polyurethane composition. The environmentally friendly polyurethane composition preferably has a viscosity of 4000 cP, 23 ° C to 9000 cP and 23 ° C from the viewpoint of compatibility.

According to another embodiment of the present invention, there is provided an environmentally friendly polyurethane waterproof flooring made of the environmentally friendly polyurethane composition described above. The eco-friendly polyurethane waterproofing flooring can be manufactured from an environmentally friendly polyurethane composition, usually employing a method known in the art.

Example

Hereinafter, the present invention will be described in detail with reference to embodiments and examples. However, the present invention is not limited to the embodiments and examples shown below, and can be arbitrarily changed without departing from the scope of the present invention and its equivalents.

[Examples 1 to 5 and Comparative Examples 1 to 3]

For according to the content described in Table 1, including the polyols, chain extenders, bismuth-containing catalyst (JY-101, Jin Yang Mars), a pigment, a plasticizer (GL-300, LG Chemical), and CaCO _3, and preparing a curing agent portion, The subject parts prepared according to the following were blended to prepare a polyurethane composition.

Here, the subject is a polyol having a NCO% (isocyanate group content) of 5% by weight and a polyol having a diol (equivalent weight 1000): triol (equivalent weight 1500): 1,3-BG (equivalent weight 45.06) = 1: The plasticizer (GL-300, manufactured by LG Chemical Co., Ltd.) contained 7% by weight, and the viscosity of the base was 2300 캜 and 5300 cP.

The polyurethane composition thus prepared was evaluated for physical properties according to the following method. The coating film for physical property test was prepared by coating on a release film, and the required amount was calculated as the width (cm) × length (cm) × height (cm) × specific gravity. Curing of the coating film for physical property test was cured at 25 占 폚 for 168 hours.

[Tensile strength and elongation]

Using a universal material tester (5965, INSTRON Inc.) according to the KS F 3211 standard.

[Hardness]

Using a Shore hardness tester.

[Sulfur Degeneration]

In the yellowing test, Toner was gray and yellowing was evaluated in five stages of 1 (no yellowing) to 5 (yellowing intensive).

As shown in Table 1, when DMTDA and an epoxy-modified polyol containing hydroxyl group (Kukdo Chemical Co., Ltd., YU-300) were used as a chain extender at a predetermined equivalent ratio (Examples 1 to 5) The tensile strength, the elongation, the hardness, and the yellowing degree, which are equivalent to those of Comparative Example 1 in which MOCA is used. On the other hand, in Comparative Example 2 in which DMTDA alone was used as a chain extender, the hardness and sulfur modification were inferior and in Comparative Example 3 in which only the epoxy-modified polyol containing a hydroxyl group was used alone, tensile strength and elongation It can be seen that it falls.

[Examples 6 to 11]

Curing agents were prepared according to the contents shown in Table 3 below, including polyol, chain extender, bismuth-based catalyst (JY-101, Jinyang Chemical), pigment, plasticizer (GL-300, LG Chem) and CaCO ₃ . Further, the isocyanate group content and viscosity of the subject were changed as shown in Table 2, and the proportion of the polyol was changed to 1: 1: 1 (diol (equivalent weight 1000): triol (equivalent weight: 1500) 2, and the plasticizer (GL-300, LG Chem) was adjusted to 7 wt%. The prepared subject and the curing agent were compounded in an NCO equivalent: OH equivalent ratio and a weight ratio described in Table 3 to prepare a polyurethane composition.

As shown in Table 3, when the content of NCO% in the subject is 4% by weight, the content of the chain extender of the curing agent is lowered and the tensile strength and hardness are inferior while the elongation is excellent (Example 6 ~ 8). Further, when the NCO% of the subject is 6% by weight, the content of the chain extender of the curing agent is increased, and the elongation is somewhat lower, but the tensile strength and the hardness are superior (Examples 10 and 11).

The polyurethane composition produced by the process for producing a polyurethane composition of the present invention is characterized in that the NCO content of the subject is 4 to 6% by weight, and DMTDA as a chain extender of the curing agent part and an epoxy-modified polyol YU-300 at a predetermined ratio, it is found that the MOCA is not used and it is eco-friendly and satisfies the physical properties equivalent to those in the case of using MOCA in terms of tensile strength, elongation, hardness, and yellowing.

Claims (9)

A prepolymer part having an isocyanate group content of 4 to 6% by weight,
A polyol having a weight average molecular weight of 500 to 5000, an average number of functional groups of 2 to 3, and a curing agent
In a process for producing a two-pack type polyurethane composition,
Wherein the chain extender is a mixture of DMTDA (Dimethyl Thio Toluene Diamine) and an epoxy-modified polyol containing a hydroxyl group. The method according to claim 1,
Wherein the subject and the curing agent are mixed at a ratio of NCO equivalents of the subject: OH equivalent ratio of the curing agent = 1.1 to 1.3, and the weight ratio of the subject to the curing agent is 1: 2 to 3.5. Way. The method according to claim 1,
Wherein the polyol is contained in an equivalent ratio of diol: triol: 1,3-butylene glycol = 1: 0.8 to 1.3: 1 to 2 in the above-mentioned subject. The method according to claim 1,
The curing agent may be selected from the group consisting of a polyol having a molecular weight of 500 to 5000, an average number of functional groups of 2 to 3, a chain elongation of 1 to 3 wt%, a bismuth catalyst of 0.5 to 2 wt%, a pigment of 1 to 3 wt% ≪ / RTI > to 10% by weight, and balance carbon,
Wherein the viscosity at 23 占 폚 is 3000 cP, 23 占 폚 to 9000 cP, 23 占 폚, and the pot life is 40 minutes to 100 minutes. The method according to claim 1,
Wherein the equivalent ratio of the DMTDA: hydroxyl group-containing epoxy-modified polyol of the chain extender is 1: 0.1 to 0.2. The method according to claim 1,
Wherein the chain extender is mixed with the curing agent in an amount of 0.41 to 1.13 based on the equivalent of the polyol. The method according to claim 1,
The subject matter of the present invention is a process for producing a two-pack environmental friendly polyurethane composition, characterized in that the viscosity at 23 캜 is 2000 cP, 23 캜 to 8000 cP, and 23 캜. 7. An environmentally friendly polyurethane composition produced by the method according to any one of claims 1 to 6. An environmentally friendly polyurethane elastic packaging material produced from the polyurethane composition according to claim 7.