® = Registered trademark of BASF SE Glythermin® P44Concentrated heat-transfer fluid for solar heating equipment and for heating and cooling equipment used in food processing and water purification

Technical Information

TI/EVO 1024 e August 2011 Page 1 of 12

Supersedes edition dated May 2007

TI/EVO 1024 e August 2011 Page 2 of 12 Glythermin P44

Properties Appearance clear to slightly opalescent liquid Density (20 °C) 1.054 – 1.057 g/cm3 DIN 51757 Refractive index n20

D 1.435 – 1.438 DIN 51423 pH 6.5 – 8.0 ASTM D 1287 Water content max. 4 % ASTM D 1123/ DIN 51777 Flash point > 100 °C DIN 51578 Reserve alkalinity 10 – 16 ml M/10 HCl ASTM D 1121

The above information is correct at the time of going to press. It does not necessarily form part of the product specification.

A detailed product specification is available from your local BASF representative.

Properties

Glythermin P44 is a non-toxic, vir tu ally odor less, hygro scopic liq uid. It is based on pro py lene gly col.

The cor ro sion inhib i tors con tained in Glythermin P44 reli ably pro tect the met als nor mally used in solar col lec tors and other heat ing equip ment from cor ro sion, age ing and scal ing.

Mix tures of Glythermin P44 and water do not demix.

Glythermin P44 does not con tain any nitrites, phos phates or amines.

Mis cibil ity Glythermin P44 is mis cible with typical com mer cial heat-trans fer fluids based on pro py lene gly col.

Applications

Glythermin P44 has to be diluted with at least 25 % v/v and no more than 75 % v/v of water when it is used in heating or cooling circuits. Potable water (100 mg/kg Cl– max.) or demineralized water with a neutral pH must be used. In order to prevent corrosion, the following minimum and maximum concentrations of Glythermin P44 should be observed.

In solar heating equipment 40 – 75 % v/v Glythermin P44 In other equipment 25 – 75 % v/v Glythermin P44

Stability in solar heating Sustained exposure to temperatures higher than 170 °C causes equipment Glythermin P44 to age prematurely.

Glythermin P44 starts to age irreversible at temperatures higher than 200 °C, with the result that the reliability of the equipment may be jeopardized.

The following table shows the effectiveness of mixtures of Glythermin P44 in inhibiting corrosion.

Corrosion tests according to ASTM D 1384 (American Society for Testing and Materials)

Average change in weight of coupons in g/m2

TI/EVO 1024 e August 2011 Page 3 of 12 Glythermin P44

Material Glythermin P44/ water (ASTM standard) 1 : 2

Copper (F-Cu) – 0.5 Soft solder (L Pb Sn 30) – 0.2 Brass (Ms 63) – 0.2 Cast iron (GG 25) + 0.2 Steel (H II) + 0.4 Cast aluminium (G AlSi6Cu4) + 0.4

Mixtures of Glythermin P44 and water do not attack the sealants normally used in heating systems. The following list of sealants, elastomers and plas-tics that are resistant to mixtures of Glythermin P44 and water has been compiled from experience, and the literature.

Examples of sealants are Fermit® and Fermitol® (registered trademarks of Nissen & Volk GmbH, Hamburg) and hemp

Butyl rubber IIR Chloroprene CR Ethylene-propylene-diene rubber EPDM Fluorocarbon elastomers FPM Natural rubber at temperatures up to 80 °C NR Nitrile rubber NBR Polyacetal POM Polyamide at temperatures up to 115 °C PA Polybutene PB Polyethylene, soft/hard PE-LD/PE-HD Polyethylene, crosslinked VPE Polypropylene PP Polytetrafluoroethylene PTFE Polyvinyl chloride, rigid PVC h Silicone rubber Si Styrene-butadiene rubber at temperatures SBR of up to 100 °C Unsaturated polyester resins UP

Phenolic and aminoplast resins, plasticized PVC and polyurethane elastomers are not resistant to Glythermin P44.

An impor tant point to note is that the per for mance of elas to mers such as EPDM is deter mined by the nature and amount of the con stit u ent addi tives and the vul can iza tion con di tions, as well as the prop er ties of the rub ber itself. For this rea son, we would rec om mend test ing the resis tance of these elas to-mers to mix tures of Glythermin P44 and water before they are put into ser vice for the first time. This applies par tic u larly to elas to mers intended for use as mem branes for expan sion tanks as described in DIN 4807. Gaskets made from 70 EPDM 281* have been shown to be resistant to mixtures of Glythermin P44 and water at temperatures of up to 160 °C, and gaskets such as REINZ-AFM 34** and Centellen 3820***, which is based on a combination of Aramid and special NBR, have been shown to be resistant at temperatures of up to 200 °C.

*** Supplied by Carl Freudenberg, Dichtungs- und Schwingungstechnik, Postfach 1 00 03 63, D-69465 Weinheim

*** Supplied by REINZ-Dichtungs GmbH, Postfach 19 09, D-89229 Neu-Ulm

*** Supplied by Hecker Werke GmbH & Co., D-71093 Weil im Schönbuch

TI/EVO 1024 e August 2011 Page 4 of 12 Glythermin P44

If losses occur due to evap o ra tion, the system can be topped up with neu-tral pot able water. If leak ages or other losses occur, the heat-trans fer liq uid in the system must be replen ished with an aque ous Glythermin P44 solu tion of the same con cen tra tion. In cases of doubt, the Glythermin P44 con tent must be deter mined.

Glythermin P44 Density at 20 °C Refractive index Freezing point % v/v g/cm3 n20

D °C

25 1.023 1.3627 – 10 30 1.029 1.3690 – 13 35 1.033 1.3747 – 17 40 1.037 1.3801 – 21 45 1.042 1.3855 – 26 50 1.045 1.3910 – 32 55 1.048 1.3966 – 40

Shelf life Glythermin P44 has a shelf life of at least three years when stored properly and professionally in originally closed containers.

Packaging/form of delivery Glythermin P44 is supplied in road tankers and 220 kg non-returnable metal drums.

Safety

Safety Data Sheet A safety data sheet has been drawn up for Glythermin P44 in accordance with EEC Directive (EG) No. 1907/2006

TI/EVO 1024 e August 2011 Page 5 of 12 Glythermin P44

Temperature °C (107587/01/e)

–40 –30 –20 –10 ±0 10 20 30 40 50 60 70 80 90 100 110 120

Den

sity

1.100

1.090

1.080

1.070

1.060

1.050

1.040

1.030

1.020

1.010

1.000

0.990

0.980

0.970

0.960

60

50

40

30

20

Water = 0

Densityof mixtures of Glythermin P44 and water as a functionof temperature and concentration

% (v/v) Glythermin P4470

g/cm3

TI/EVO 1024 e August 2011 Page 6 of 12 Glythermin P44

Temperature °C (107587/02/e)

–40 –30 –20 –10 ±0 10 20 30 40 50 60 70 80 90 100

Kin

emat

ic v

isco

sity

1000

800

600

200

400

100

80

60

20

40

10

8

6

2

4

1

0.8

0.6

0.2

0

0.4

Viscosityof mixtures of Glythermin P44 and water as a functionof temperature and concentration

60

50

40

30

20

Water = 0

70

% (v/v) Glythermin P4480

mm2/s

TI/EVO 1024 e August 2011 Page 7 of 12 Glythermin P44

Temperature (107587/03/e)

–20 ±0 +20 40 60 80 100

Spe

cific

hea

t ca

paci

ty

2.0

2.5

3.0

3.5

4.0

J/g·K

30

40

50

60

70

80

90

100

% (v/v) Glythermin P44

°C

20

Specific heat capacityof mixtures of Glythermin P44 and water as a functionof temperature and concentration

TI/EVO 1024 e August 2011 Page 8 of 12 Glythermin P44

(107587/04/e)

–20 ±0 +20 40 60 80 °C 120100

Hea

t co

nduc

tivity

0.2

Temperature

0.3

0.4

0.5

0.7

0.6

% (v/v) Glythermin P44Heat conductivityof mixtures of Glythermin P44 and water as a functionof temperature and concentration

20

30

40

50

70

60

80

W/m·K

TI/EVO 1024 e August 2011 Page 9 of 12 Glythermin P44

(107587/06/e)

20 30 50 100 120 140 160 °C 0.002

Temperature

0.01

0.05

0.2

1

5

Vapour pressureof mixtures of Glythermin P44 and water as a functionof concentration

bar

Vapo

ur p

ress

ure

% (v/v) Glythermin P44

80

100

70 40

90

70 180

0

0.005

0.02

0.1

0.5

2

10

40 60 80

TI/EVO 1024 e August 2011 Page 10 of 12 Glythermin P44

(107587/07/e) % (v/v) Glythermin P44

Tem

pera

ture

°C

0 10 20 30 40 50 60 90 70 80 40

80

100

140

160

60

120

180

200

0.7

bar

1.0

0.4

0.2

0.1

Boiling point isobarsof mixtures of Glythermin P44 and water as a functionof concentration

2.0

3.5

TI/EVO 1024 e August 2011 Page 11 of 12 Glythermin P44

140

160

180

200

220

240

260

0 10 20 30 40 50 60 70 80 90 100

% (v/v) Glythermin P44(107587/08/e)

10 bar

9 bar

8 bar

7 bar

6 bar

5 bar

Boiling point isobarsof mixtures of Glythermin P44 and water as a functionof concentration

Tem

per

atur

e

150

170

190

210

230

250

4 bar

°C

TI/EVO 1024 e August 2011 Page 12 of 12 Glythermin P44

BASF SE Fuel and Lubricant solutions 67056 Ludwigshafen, Germany www.basf.com/automotive-oil

Note

The data contained in this publication are based on our current knowledge and experience. In view of the many factors that may affect processing and application of our product, these data do not relieve processors from carrying out their own investigations and tests; neither do these data imply any guarantee of certain properties, nor the suitability of the product for a specific purpose. Any descriptions, drawings, photographs, data, pro- portions, weights etc. given herein may change without prior information and do not constitute the agreed contractual quality of the product. It is the responsibility of the recipient of our products to ensure that any proprietary rights and existing laws and legislation are observed.

August 2011