阅读说明：本技术 基于聚醚碳酸酯多元醇的聚氨酯泡沫材料 (Polyurethane foams based on polyether carbonate polyols ) 是由 P.希尔肯 S.林德纳 H.内夫茨格 R.阿尔巴赫 A.韦劳 于 2018-05-29 设计创作，主要内容包括：本发明涉及通过使异氰酸酯组分与可与异氰酸酯反应并包含至少一种聚醚碳酸酯多元醇的组分的反应制备聚氨酯泡沫材料的方法,并且其中所述反应在组分K存在下进行,其中所述组分K选自下列一种或多种化合物：K1根据式(II)的二羰基化合物,其中排除作为一元或多元羧酸的酯的二羰基化合物,(R<Sup>2</Sup>)<Sub>x</Sub>-(C=O)-(R<Sup>1</Sup>)<Sub>n</Sub>-(C=O)-(R<Sup>3</Sup>)<Sub>y</Sub>(II),K2根据式(III)的β-酮腈,(R<Sup>5</Sup>)<Sub>w</Sub>-(C=O)-C(H)(R<Sup>4</Sup>)(-CN)(III),K3具有式(IV)的二羰基化合物,K4羟基羧酸,优选α-羟基羧酸或β-羟基羧酸,K5羧酸盐。本发明还涉及通过本发明的方法制成的聚氨酯泡沫材料及其用途。<Image he="79" wi="381" file="DEST_PATH_IMAGE001.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>(The present invention relates to a process for preparing a polyurethane foam by reacting an isocyanate component with a component which is reactive with isocyanate and comprises at least one polyether carbonate polyol, and wherein the reaction is carried out in the presence of a component K, wherein the component K is selected from one or more of the following compounds: k1 dicarbonyl compounds according to formula (II) excluding dicarbonyl compounds as esters of mono-or polycarboxylic acids, (R) 2 ) x ‑(C=O)‑(R 1 ) n ‑(C=O)‑(R 3 ) y (II), K2 beta-ketonitriles according to formula (III), (R) 5 ) w ‑(C=O)‑C(H)(R 4 ) (-CN) (III), K3A dicarbonyl compound having the formula (IV), K4 a hydroxycarboxylic acid, preferably an alpha-hydroxycarboxylic acid or a beta-hydroxycarboxylic acid, K5 carboxylate. The invention also relates to polyurethane foams produced by the process of the invention and to the use thereof.)

1. Process for preparing polyurethane foams by reacting

Component A, which contains a polyether carbonate polyol (component A1) having a hydroxyl number according to DIN53240-1 (6 months 2013) of from ≥ 20 mg KOH/g to ≤ 120 mg KOH/g and optionally one or more polyether polyols (component A2) having a hydroxyl number according to DIN53240-1 (6 months 2013) of from ≥ 20 mg KOH/g to ≤ 250mg KOH/g and an ethyleneoxy content of from ≥ 0 to ≤ 60% by weight, wherein the polyether polyol A2 contains no carbonate units,

b is optionally

B1) Catalyst and/or

B2) Adjuvants and additives

C water and/or a physical blowing agent,

and

d a diisocyanate and/or polyisocyanate,

wherein the preparation is carried out at an index of from ≥ 90 to ≤ 120,

characterized in that the preparation is carried out in the presence of a component K, wherein the component K is selected from one or more of the following compounds

K1 dicarbonyl compounds according to formula (II) with the exception of dicarbonyl compounds which are esters of mono-or polycarboxylic acids,

wherein

n is an integer from ≥ 0 to ≤ 6, preferably ≥ 1 to ≤ 4, more preferably n =1, 2 or 4, most preferably n =1 or 2,

x and y may be the same or different and are integers from ≥ 1 to ≤ 3, preferably 1 or 2,

R¹which may be identical or different and are substituted or unsubstituted C1-C22-alkylene, substituted or unsubstituted C1-C22-alkenylene, substituted or unsubstituted C6-C18-arylene, heteroarylene, an amine or an amide, or are part of a 4-to 7-membered ring or a polycyclic ring system,

R²、R³which may be identical or different and are H, substituted or unsubstituted C1-C22-alkyl, substituted or unsubstituted C1-C22-alkenyl, substituted or unsubstituted C6-C18-aryl, heteroaryl, amine, amide, hydroxyl or nitrile, or are part of a 4-to 7-membered ring or of a polycyclic system,

k2 beta-ketonitriles according to formula (III)

Wherein

w is an integer from ≥ 1 to ≤ 3, preferably 1 or 2,

R⁴is H, substituted or unsubstituted C1-C22-alkyl, substituted or unsubstituted C1-C22-alkenyl, substituted or unsubstituted C6-C18-aryl, heteroaryl, amine or amide, or is a constituent of a 4-to 7-membered ring or a polycyclic system,

R⁵which may be identical or different and are H, substituted or unsubstituted C1-C22-alkyl, substituted or unsubstituted C1-C22-alkenyl, substituted or unsubstituted C6-C18-aryl, heteroaryl, acyl, amine, amide, hydroxyl or nitrile, or are part of a 4-to 7-membered ring or of a polycyclic system,

k3 is a dicarbonyl compound having the formula (IV),

wherein

Z is-O-, -N (R)⁹) -or C1-C6-alkylene,

r, s are 1 or 2, wherein

When R is⁶Is a single bond, -C (R)⁹)₂-, -O-or-N (R)⁹) -when r and s are 2,

when R is⁶Is = C (H) -r is 1 and s is 2,

when R is⁶Is = C (H) -r is 2 and s is 1,

when R is⁶In the case of double bonds, r and s are 1,

R⁶is a single bond, a double bond, -C (R)⁹)₂-, = C (H) -, -O-or-N (R)⁹)-，

R⁷、R⁸Which may be identical or different and are H, substituted or unsubstituted C1-C22-alkyl, substituted or unsubstituted C1-C22-alkenyl, substituted or unsubstituted C6-C18-aryl, heteroaryl, acyl, amine, amide, hydroxyl or nitrile, or are part of a 4-to 7-membered ring or of a polycyclic system,

R⁹is H, substituted or unsubstituted C1-C22-alkyl, substituted or unsubstituted C1-C22-alkenyl, substituted or unsubstituted C6-C18-aryl, heteroaryl, acyl, amine, amide, hydroxyOr a nitrile, or is a constituent of a 4-to 7-membered ring or a polycyclic system,

k4 hydroxycarboxylic acids, preferably alpha-hydroxycarboxylic acids or beta-hydroxycarboxylic acids, more preferably alpha-hydroxybenzoic acid, malic acid or tartaric acid,

k5 Carboxylic acid salts, i.e. compounds in which the cation is Li, the carboxylate anion and the cation⁺、Na⁺、K⁺、Rb⁺、Cs⁺、Be^{2 +}、Mg²⁺、Ca²⁺、Sr²⁺、Ba²⁺Or ammonium-based compounds N (H)_o(R¹⁰)_pWherein o and p are integers from 0 to 4, o + p = 4 and wherein R¹⁰Is substituted or unsubstituted C1-C22-alkyl, substituted or unsubstituted C1-C22-alkenyl, substituted or unsubstituted C6-C18-aryl, the cation preferably being an ammonium-based compound N (H)_o(R¹⁰)_pWherein o, p, R¹⁰Having the definition given above, the cation is more preferably selected from NH₄ ⁺、(NR¹⁰ ₄)⁺、(NR¹⁰ ₃H)⁺Wherein R is one or more ammonium-based compounds of (1)¹⁰With the definitions given above in mind,

and wherein component K is used in an amount of from ≥ 0.05 to 10.0 parts by weight, preferably from ≥ 0.5 to ≤ 6.0 parts by weight, particularly preferably from ≥ 1.0 to ≤ 5.0 parts by weight, where all parts by weight of component K are based on the sum of the parts by weight of components A1 + A2 =100 parts by weight.

2. A process as claimed in claim 1, wherein component a has the following composition:

a1 from not less than 40 to not more than 100 parts by weight of one or more polyether carbonate polyols having a hydroxyl number according to DIN53240-1 (6 months 2013) from not less than 20 mg KOH/g to not more than 120 mg KOH/g,

a2 ≤ 60 to ≥ 0 parts by weight of one or more polyether polyols having a hydroxyl number in accordance with DIN53240-1 (6 months 2013) of ≥ 20 mg KOH/g ≤ 250mg KOH/g and an ethylene oxide content of ≥ 0 to ≤ 60% by weight, wherein the polyether polyol A2 contains no carbonate units,

a3 is based on the sum of the parts by weight of components A1 and A2, 20 to 0 parts by weight of one or more polyether polyols having a hydroxyl number of 20 mg KOH/g to 250mg KOH/g to DIN53240-1 (6 months 2013) and an ethylene oxide content of > 60% by weight, where the polyether polyol A3 is free of carbonate units,

a4 based on the sum of the parts by weight of components A1 and A2, from ≤ 40 to ≥ 0 parts by weight of one or more polymer polyols, PHD polyols and/or PIPA polyols,

a5 based on the sum of the parts by weight of components A1 and A2, from ≦ 40 to ≥ 0 part by weight of the polyol falling under the definition of components A1 to A4,

wherein all parts by weight of components a1, a2, A3, a4, a5 are normalized to give 100 total parts by weight of a1 + a2 in the composition.

3. The process as claimed in claim 1 or 2, wherein component K is used in amounts of ≥ 0.5 to ≤ 6.0 parts by weight, where all parts by weight of component K are based on the sum of the parts by weight of components A1 + A2 =100 parts by weight.

4. A process as claimed in any one of claims 1 to 3, wherein use is made of

B1 catalysts, e.g.

a) Aliphatic tertiary amines, alicyclic tertiary amines, aliphatic amino ethers, alicyclic amino ethers, aliphatic amidines, alicyclic amidines, urea and urea derivatives and/or

b) Tin (II) salts of carboxylic acids and

b2 optional adjuvants and additives

As component B.

5. A process as claimed in any one of claims 1 to 3, wherein use is made of

B1 catalyst and

b2 optional adjuvants and additives

As a component B, it is possible to use,

the following materials were used as component B1:

b1.1 from ≥ 0.05 to ≤ 1.5 parts by weight of urea and/or urea derivative, based on the sum of the parts by weight of components A1 and A2

B1.2 based on the sum of the parts by weight of components A1 and A2, from ≥ 0.03 to ≤ 1.5 parts by weight of a catalyst which is different from component B1.2, where the amine catalyst content in component B1.2 is maximally 50% by weight based on component B1.

6. A process as claimed in any one of claims 2 to 5, wherein component A is free of component A3 and/or A4.

7. A process as claimed in any one of claims 1 to 6, wherein component A comprises:

a1 from more than or equal to 65 to less than or equal to 75 parts by weight of one or more polyether carbonate polyols having a hydroxyl number according to DIN53240-1 (6 months 2013) from more than or equal to 20 mg KOH/g to less than or equal to 120 mg KOH/g, and

35 to 25 parts by weight of A2 or less of one or more polyether polyols having a hydroxyl number of 20 mg KOH/g to 250mg KOH/g according to DIN53240-1 (6 months 2013) and an ethylene oxide content of 0 to 60% by weight or more, wherein the polyether polyol A2 contains no carbonate units.

8. A process as claimed in any of claims 1 to 7, wherein component A1 comprises polyether carbonate polyols obtainable by copolymerization of carbon dioxide and one or more alkylene oxides in the presence of one or more H-functional starter molecules, wherein the polyether carbonate polyols preferably have from 15 to 25% by weight of CO₂And (4) content.

9. A process as claimed in any one of claims 1 to 8, wherein component K is selected from one or more of the following compounds

K1 dicarbonyl compounds according to formula (II) with the exception of dicarbonyl compounds which are esters of mono-or polycarboxylic acids,

wherein

n is 1,2 or 4, preferably 1 or 2,

x and y may be the same or different and are 1 or 2,

R¹which may be the same or different and are substituted or unsubstituted C1-C22-alkylene, substituted or unsubstituted C6-C18-arylene or heteroarylene,

R²、R³may be identical or different and are substituted or unsubstituted C1-C22-alkyl, amine, amide or hydroxyl,

k2 beta-ketonitriles according to formula (III)

Wherein

w is 1 or 2 and w is a linear or branched,

R⁴is a compound of formula (I) wherein the compound is H,

R⁵may be the same or different and is an amine, amide or acyl group,

k3 dicarbonyl compounds having the formula (IV)

Wherein

Z is-O-or-N (R)⁹)-，

r, s are 1 or 2, wherein

When R is⁶Is a single bond or-C (R)⁹)₂-when r and s are 2,

when R is⁶Is = C (H) -r is 1 and s is 2,

when R is⁶Is = C (H) -r is 2 and s is 1,

when R is⁶In the case of double bonds, r and s are 1,

R⁶is a single bond, a double bond, -C (R)⁹)₂-or = C (H) -,

R⁷、R⁸may be the same or different and is H, substituted or unsubstituted C1-C22-alkyl, substituted or unsubstituted C1-C22-alkenyl, substituted or unsubstitutedC6-C18-aryl or heteroaryl, or is a 4-to 7-membered ring or is part of a polycyclic ring system,

R⁹is H, substituted or unsubstituted C1-C22-alkyl, substituted or unsubstituted C1-C22-alkenyl, substituted or unsubstituted C6-C18-aryl, heteroaryl or hydroxy,

k4 is selected from one or more compounds of alpha-hydroxycarboxylic acids and beta-hydroxycarboxylic acids,

k5 Carboxylic acid salt, i.e. a compound of a carboxylate anion and a cation, wherein the cation is an ammonium-based compound N (H)_o(R¹⁰)_pWherein o and p are integers from 0 to 4, o + p = 4, and wherein R is¹⁰Is substituted or unsubstituted C1-C22-alkyl, substituted or unsubstituted C1-C22-alkenyl, substituted or unsubstituted C6-C18-aryl.

10. A method as claimed in any one of claims 1 to 8, wherein

K1 is selected from one or more compounds of succinic acid, thiophene-2, 5-dicarboxylic acid, malonamide, acetoacetamide, N-dimethylacetoacetamide, acetylacetone, 5-dimethyl-1, 3-cyclohexanedione, terephthalic acid, oxamide, diacetylhydrazine, adipic acid, maleic acid or citraconic acid,

k2 is selected from one or more compounds of cyanoacethydrazide, N-benzyl-2-cyanoacetamide, 2-amino-2-cyanoacetamide, N-tert-butyl-2-cyanoacetamide or cyanoacetylurea,

k3 is selected from one or more of phthalic anhydride, 1,2,3, 6-tetrahydrophthalic anhydride, N-hydroxyphthalimide, dodecenylsuccinic anhydride, maleic anhydride or citraconic anhydride.

11. A process as claimed in any of claims 1 to 10, wherein component B comprising at least one tin (II) salt of the formula (IX) is used

Wherein x is an integer from 8 to 24, preferably from 10 to 20, particularly preferably from 12 to 18.

12. A process as claimed in any of claims 1 to 11, wherein 2, 4-and/or 2,6-TDI is used as the isocyanate component in component D.

13. Polyurethane foam obtainable by a process as claimed in any one of claims 1 to 12.

14. A polyurethane foam as set forth in claim 13 wherein the polyurethane foam is a polyurethane soft foam.

15. Use of the polyurethane foam as claimed in claim 13 or 14 for the production of furniture cushions, textile inserts, mattresses, vehicle seats, head rests, arm rests, sponges, foam films for automotive parts, such as headliners, door trims, seat cushions and components.

Examples

Measuring method:

The OH number (hydroxyl number) determined experimentally was determined by DIN53240-1 (6 months 2013).

Emission measurements-cyclic propylene carbonate

By means of¹H NMR spectroscopy (Bruker, DPX 400, 400 MHz) quantified cPC content: approximately 24 hours after the preparation of the polyurethane flexible foam, a Soxhlet apparatus was used in acetone at 60 ℃Samples of 1.2-1.5 grams of the polyurethane flexible foam were extracted for 7.5 hours. The extract was concentrated under reduced pressure and placed in deuterated chloroform using dimethyl terephthalate or 1,2, 4-trichlorobenzene as internal standard. Then, by¹H NMR quantified cPC content by comparison with an internal standard.

The invention is illustrated by the following examples, without being restricted thereto. Abbreviations refer to:

a1-1 polyether carbonate polyol, functionality 2.8, OH number 54 mg KOH/g, 14% by weight CO₂Prepared by copolymerization of propylene oxide and carbon dioxide with glycerol and propylene glycol as H-functional starter compounds in the presence of double metal cyanide catalysts

B1-1 Niax catalyst A-1, a commercial product from Momentive Performance Materials GmbH based on bis [2- (N, N' -dimethylamino) ethyl ]

B1-2 Desmorapid SO, tin catalyst (from Covestro AG)

B2-1 Tegostab BF 2370, a commercial product from Evonik Industries, Inc

B2-2 Niax Silicone L-620, a commercial product from Momentive Performance Materials GmbH

C-1: water

D-1 Desmodur T80, mixture of toluene 2,4 '-diisocyanate and toluene 2,6' -diisocyanate in a ratio of 80/20 (from Covestro AG)

K1-1 Acetamide (from Sigma-Aldrich Co.)

K1-2 terephthalic acid (from Sigma-Aldrich Co.)

K1-3 adipic acid (from Sigma-Aldrich Co.)

K1-4 malonamide (from Sigma-Aldrich Co.)

K2-1 Cyanoacetylurea (from abcr GmbH)

K2-2 cyanoacetamide (from abcr GmbH)

K3-1: 1,2,3, 6-Tetrahydrophthalic anhydride (from Merck KGaA)

K3-2: N-hydroxyphthalimide (from Sigma-Aldrich Co.)

K3-3 dodecenyl succinic anhydride (from Sigma-Aldrich Co.)

K4-1 malic acid (from Sigma-Aldrich Co.)

K5-1 ammonium tartrate (from Sigma-Aldrich Co.)

Fyrol-PNX alkyl oligophosphate (from ICL-IP).

Production of laboratory Flexible foams:

the flexible polyurethane foams described in table 1 were made in a discontinuous process. The components were mixed by means of a laboratory mixer model LM 34 from Pendra ulik.

Component A1-1 (125 g) was weighed out into a 500 ml paper cup together with components B1-1, B2-1 and C-1 and premixed with a high-speed stirrer for 10 seconds. Thereafter, component B1-2 was added and mixed thoroughly at the same stirrer speed for 10 seconds. Finally, component D-1 was added to this mixture, it was mixed for 7 seconds, and the mixture was transferred to a prepared carton having dimensions of 20 cm x 20 cm x 15 cm.

The height of the block of polyurethane flexible foam material is about 14-15 cm. The final polyurethane flexible foam was stored in cartons for approximately 20-24 hours before being sawn into test specimens for testing. The compressive strength and the coarse density of the polyurethane flexible foams were determined in accordance with DIN EN ISO 3386-1-98.

In the case of component K, this component K is first pre-stirred in component A1-1 before the rest of the formulation components are added as described above.

Production of Flexible foam moulded in a laboratory Box (Laborkisten)

The flexible polyurethane foams described in table 2 were produced in a discontinuous process. For this purpose, component A1-1 (2000 g) was weighed out in a5 l bucket together with components B1-1, B2-2 and C-1 and premixed for 20 seconds with a high-speed stirrer. Thereafter component B1-2 was added and mixed at the same speed for 10 seconds. Finally, component D-1 was added to this mixture, it was mixed for another 7 seconds, and the mixture was transferred to a prepared carton having dimensions of 50 cm x 50 cm x 50 cm.

The height of the block of polyurethane flexible foam material is about 50-55 cm. The final polyurethane flexible foam was stored in cartons for approximately 20-24 hours before being sawn into test specimens for testing. The compressive strength and the coarse density of the polyurethane flexible foams were determined in accordance with DIN EN ISO 3386-1-98.

In the case of component K, this component K is first pre-stirred in component A1-1 before the rest of the formulation components are added as described above.

Results

a) Laboratory Flexible foam (Table 1)

Without component K, the resulting polyurethane flexible foam exhibits a high cyclic propylene carbonate emission (comparative example 1); by using a P — O containing compound, such emissions can be reduced (comparative example 2). Surprisingly, however, the addition of component K leads continuously to lower values of the cyclic propylene carbonate in the emission measurement compared to comparative examples 1 and 2 (examples 3 to 15).

Surprisingly, as shown for example by a comparison of examples 7, 8 and 15 with comparative examples 1 and 2 (table 1), very small additions starting from 0.05 parts by weight of component K based on 100 parts by weight of component a1-1 have led to a reduction in the emission of cyclic propylene carbonate.

b) Soft foam molding box laboratory (Table 2)

Without component K, the resulting polyurethane flexible foam showed high cyclic propylene carbonate emission (comparative example 16), where higher cyclic propylene carbonate emission levels were found compared to the laboratory flexible foam prepared on a smaller scale (comparative example 1). By using a P-O containing compound, this emission can be reduced (comparative example 17). Surprisingly, however, the addition of component K according to the invention leads continuously to significantly lower values of the cyclic propylene carbonate in the emission measurement compared to comparative examples 16 and 17 (examples 18 to 21).

Surprisingly, as shown by a comparison of examples 18 and 20 with comparative examples 16 and 17 (Table 2), the addition of very small amounts starting from 0.05 parts by weight of component K, based on 100 parts by weight of component A1-1, already leads to a reduction in the emission of cyclic propylene carbonate.

TABLE 1 laboratory Flexible foams

Components of the examples		1 (comparison)	2 (comparison)	3	4	5	6
								A1-1	[ parts by weight]	100	100	100	100	100	100
B1-1	[ parts by weight]	0.12	0.12	0.12	0.12	0.12	0.12
								B1-2	[ parts by weight]	0.18	0.18	0.18	0.18	0.18	0.18
B2-1	[ parts by weight]	1.20	1.20	1.20	1.20	1.20	1.20
								C-1	[ parts by weight]	4.50	4.50	4.50	4.50	4.50	4.50
Fyrol-PNX	[ parts by weight]	-	2.0	-	-	-	-
								K1-1	[ parts by weight]	-	-	2.0	-	-	-
K1-2	[ parts by weight]	-	-	-	2.0	-	-
								K2-1	[ parts by weight]	-	-	-	-	2.0	-
K3-1	[ parts by weight]	-	-	-	-	-	2.0
								D-1	[ parts by weight]	56.01	56.01	56.01	56.01	56.01	56.01
Index of refraction		108	108	108	108	108	108
								Coarse density	kg m-3	27.86	27.83	30.37	25.92	24.03	25.28
Compressive Strength at 40% compression (fourth cycle)	kPa	5.02	6.22	8.25	4.08	5.29	4.54
								Cyclic propylene carbonate	[mg/kg]	92	13	6	7	8	3

TABLE 1 (continuation)

Components of the examples		7	8	9	10	11	12	13	14	15
											A1-1	[ parts by weight]	100	100	100	100	100	100	100	100	100
B1-1	[ parts by weight]	0.12	0.12	0.12	0.12	0.12	0.12	0.12	0.12	0.12
											B1-2	[ parts by weight]	0.18	0.18	0.18	0.18	0.18	0.18	0.18	0.18	0.18
B2-1	[ parts by weight]	1.20	1.20	1.20	1.20	1.20	1.20	1.20	1.20	1.20
											C-1	[ parts by weight]	4.50	4.50	4.50	4.50	4.50	4.50	4.50	4.50	4.50
Fyrol-PNX	[ parts by weight]	-	-	-	-	-	-	-	-	-
											K1-3	[ parts by weight]	0.08	-	-	-	-	-	-	-	-
K1-4	[ parts by weight]	-	0.8	3.5	5.5	-	-	-	-	-
											K3-2	[ parts by weight]	-	-	-	-	-	-	-	1.0	-
K3-3	[ parts by weight]	-	-	-	-	1.5	3.5	-	-	-
											K4-1	[ parts by weight]	-	-	-	-	-	-	-	-	0.08
K5-1	[ parts by weight]	-	-	-	-	-	-	1.0	-	-
											D-1	[ parts by weight]	56.01	56.01	56.01	56.01	56.01	56.01	56.01	56.01	56.01
Index of refraction		108	108	108	108	108	108	108	108	108
											Coarse density	kg m-3	27.68	25.76	24.08	25.50	24.93	24.38	25.09	23.67	28.77
Compressive Strength at 40% compression (fourth cycle)	kPa	6.83	4.55	5.00	4.58	5.09	5.28	5.75	6.20	6.68
											Cyclic propylene carbonate	[mg/kg]	6	7	6	9	11	2	10	9	7

TABLE 2 Box-packed molded Flexible foam for laboratory

Components of the examples		16 (comparison)	17 (comparison)	18	19	20	21
								A1-1	[ parts by weight]	2000	2000	2000	2000	2000	2000
B1-1	[ parts by weight]	2.4	2.4	2.4	2.4	2.4	2.4
								B1-2	[ parts by weight]	3.6	3.6	3.6	3.6	3.6	3.6
B2-2	[ parts by weight]	24	24	24	24	24	24
								C-1	[ parts by weight]	90	90	90	90	90	90
Fyrol-PNX	[ parts by weight]	-	40	-	-	-	-
								K1-4	[ parts by weight]	-	-	16	-	-	-
K2-1	[ parts by weight]	-	-	-	40	-	-
								K2-2	[ parts by weight]	-	-	-	-	16	-
K3-1	[ parts by weight]	-	-	-	-	-	40
								D-1	[ parts by weight]	1120	1120	1120	1120	1120	1120
Index of refraction		108	108	108	108	108	108
								Coarse density	kg m-3	22.0	22.6	21.3	21.5	21.8	21.6
Compressive Strength at 40% compression (fourth cycle)	kPa	4.15	5.43	3.69	3.69	3.89	3.3
								Cyclic propylene carbonate	[mg/kg]	558	142	17	9	20	12