Reaction product of 1,3-butadiene,homopolymer,oligomeric with 2,5-furandione (Polyvest EP OC 800S)
File No: NA/970
Month Year
NATIONAL INDUSTRIAL CHEMICALS NOTIFICATION
AND ASSESSMENT SCHEME
FULL PUBLIC REPORT
Reaction Product of 1,3-Butadiene, Homopolymer, Oligomeric with 2,5-Furandione
(Polyvest EP OC 800S)
This Assessment has been compiled in accordance with the provisions of the Industrial Chemicals
(Notification and Assessment) Act 1989 (the Act) and Regulations. This legislation is an Act of the
Commonwealth of Australia. The National Industrial Chemicals Notification and Assessment
Scheme (NICNAS) is administered by the National Occupational Health and Safety Commission
which also conducts the occupational health & safety assessment. The assessment of environmental
hazard is conducted by the Department of the Environment and the assessment of public health is
conducted by the Department of Health and Aged Care.
For the purposes of subsection 78(1) of the Act, copies of this full public report may be inspected by
the public at the Library, National Occupational Health and Safety Commission, Plaza level, Alan
Woods Building, 25 Constitution Avenue, Canberra ACT 2600 between 9 AM and 5 PM Monday to
Friday.
Copies of this full public report may also be requested, free of charge, by contacting the
Administration Coordinator on the fax number below.
For enquiries please contact the Administration Section at:
Street Address: 92 -94 Parramatta Rd CAMPERDOWN NSW 2050, AUSTRALIA
Postal Address: GPO Box 58, SYDNEY NSW 2001, AUSTRALIA
Telephone: (61) (02) 9577 9514 FAX (61) (02) 9577 9465
Director
Chemicals Notification and Assessment
TABLE OF CONTENTS
FULL PUBLIC REPORT...........................................................................................................3
1. APPLICANT ..................................................................................................................3
2. IDENTITY OF THE CHEMICAL .................................................................................3
3. PHYSICAL AND CHEMICAL PROPERTIES.............................................................4
3.1 Comments on Physico-Chemical Properties ..........................................................5
4. PURITY OF THE CHEMICAL .....................................................................................5
5. USE, VOLUME AND FORMULATION ......................................................................6
6. OCCUPATIONAL EXPOSURE ...................................................................................7
7. PUBLIC EXPOSURE ....................................................................................................7
8. ENVIRONMENTAL EXPOSURE ................................................................................7
8.1 Release ...................................................................................................................7
8.2 Fate .........................................................................................................................7
9. EVALUATION OF TOXICOLOGICAL DATA...........................................................8
10. ASSESSMENT OF ENVIRONMENTAL EFFECTS ...............................................8
11. ASSESSMENT OF ENVIRONMENTAL HAZARD ...............................................8
12. ASSESSMENT OF PUBLIC AND OCCUPATIONAL HEALTH AND SAFETY
EFFECTS ...............................................................................................................................8
Occupational Health and Safety ....................................................................................9
13. RECOMMENDATIONS ...........................................................................................9
13.1 Secondary notification ..........................................................................................10
14. MATERIAL SAFETY DATA SHEET ....................................................................10
15. REFERENCES .........................................................................................................10
NA/970
FULL PUBLIC REPORT
Reaction Product of 1,3-Butadiene, Homopolymer, Oligomeric with 2,5-Furandione
(Polyvest EP OC 800S)
1. APPLICANT
Dow Corning Australia Pty Ltd of 3 Innovation Road NORTH RYDE 2113 (ACN 008 444
166) of has submitted a limited notification statement in support of their application for an
assessment certificate for `Reaction product of 1,3-butadiene, homopolymer, oligomeric with
2,5-furandione (Polyvest EP OC 800S)'.
2. IDENTITY OF THE CHEMICAL
The notifier has not applied for any information to be exempt from publication.
Reaction product of 1,3-butadiene, homopolymer,
Chemical Name:
oligomeric with 2,5-furandione
Chemical Abstracts Service
147170-46-5
(CAS) Registry No.:
Polybutadiene oil, containing carboxylic groups
Other Names:
Polyvest OC 800S
Polyvest C 70
Polyvest EP OC 800S
Marketing Name:
Dow Corning 991 Silicone Hi-Performance Sealant
(containing the notified polymer)
C4H7 (C8H8O3)n C4H7
Molecular Formula:
Structural Formula:
O
O O
C C
CH2 CH
CH2 CH CH CH C4H7
C4H7
n
4 December 2001
FULL PUBLIC REPORT
NA/970 3/11
Number-Average
3 300
Molecular Weight (NAMW):
Weight-Average
13 600
Molecular Weight:
Maximum Percentage of Low
Molecular Weight Species
1.7%
Molecular Weight < 500:
5.4%
Molecular Weight < 1 000:
Method of Detection and
GPC
Determination:
Spectral Data:
3. PHYSICAL AND CHEMICAL PROPERTIES
Yellowish/greyish white oily liquid
Appearance at 20癈 & 101.3 kPa:
-35癈
Melting Point:
0.94 at 20癈
Specific Gravity:
< 0.01 kPa
Vapour Pressure:
Not determined; expected to be insoluble
Water Solubility:
Partition Co-efficient
Not determined (see comments below).
(n-octanol/water):
Not determined (see comments below).
Hydrolysis as a Function of pH:
Not determined (see comments below).
Adsorption/Desorption:
Not determined (see comments below).
Dissociation Constant:
Not determined; liquid.
Particle Size:
About 300癈 (DIN51758)
Flash Point:
Not determined; liquid.
Flammability Limits:
Not determined.
Autoignition Temperature:
Polyvest OC 800 S has no explosive properties and
Explosive Properties:
does not contain any functional group with explosive
properties.
4 December 2001
FULL PUBLIC REPORT
NA/970 4/11
Not determined (see comments below).
Reactivity/Stability:
3.1 Comments on Physico-Chemical Properties
The water solubility was not determined for this notification because the notified polymer
reacts with water to form the corresponding dicarboxylic acid. However, the notifier indicates
that the notified polymer is expected to be insoluble in water based on its predominantly
hydrocarbon structure.
The notified polymer contains anhydride groups that are expected to react with water,
suggesting that the notified polymer will be susceptible to hydrolysis. The remainder of the
notified polymer does not contain any hydrolysable groups.
The partition coefficient has not been determined due to the notified polymers expected low
water solubility and reactivity towards water. Therefore, the notified polymer is expected to
partition into the octanol phase.
No adsorption/desorption tests were conducted for this notification. The notified polymer is
expected to be relatively immobile in soil due to the high molecular weight and low water
solubility.
No dissociation tests were conducted for the notified polymer because it does not contain any
ionisable groups.
The notified polymer contains anhydride groups classified as highly reactive functional
groups. Nonetheless, the Material Safety Data Sheet (MSDS) indicates that the sealant
containing the notified polymer is stable under normal conditions.
4. PURITY OF THE CHEMICAL
> 99%
Degree of Purity:
Weight Percentage of
Ingredients:
Chem ical Nam e CAS No. W eight % Residual %
1,3-Butadiene, homopolymer, oligomeric 68441-52-1 80-98 Not specified
2,5-Furandione 108-31-6 2-20 0.01
Hazardous Impurities:
Chemical name: 1,3-Butadiene
Synonyms: Buta-1, 3-diene
4 December 2001
FULL PUBLIC REPORT
NA/970 5/11
CAS N o.: 106-99-0
Weight percentage: < 1 ppm
Extremely flammable.
Toxic properties:
May cause cancer (Carc. Cat. 2) (NOHSC, 1999a).
NOHSC Exposure Standard 22 mg/m3 (10 ppm), TWA
(NOHSC, 1995).
Chemical name: 2-Butenedioic acid (Z)-
Synonyms: Maleic acid
CAS N o.: 110-16-7
Weight percentage: 0.02%
Harmful if swallowed.
Toxic properties:
Irritating to eyes, respiratory system and skin (NOHSC,
1999a).
Non-hazardous Impurities
None.
(> 1% by weight):
Additives/Adjuvants:
Chemical name: Benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-
hydroxy-, octadecyl ester
CAS N o.: 2082-79-3
Weight percentage: 0.1%
Chemical name: Phenol, nonyl-, phosphite (3:1)
CAS N o.: 26523-78-4
Weight percentage: 0.1%
5. USE, VOLUME AND FORMULATION
The notified polymer, Polyvest EP OC 800S, is a rheology controlling additive in silicone
sealants used for construction applications.
Polyvest EP OC 800S is not manufactured in Australia but will be imported in a ready-to-use
product, Dow Corning 991 Silicone Hi-Performance Sealant, at a concentration of <1%. Dow
Corning 991 Silicone Hi-Performance Sealant will be imported in moisture resistant, metal
tubes of polyethylene/polypropylene cartridges or sausages of 100-615 g.
The notifier estimated that 30-50 kg notified polymer per year will be imported over the first
3 years, and 200-300 kg per annum during year 4 and 5.
4 December 2001
FULL PUBLIC REPORT
NA/970 6/11
6. OCCUPATIONAL EXPOSURE
The notifier estimates that 20 to 50 workers will be involved in transportation and storage of
the product containing the notified polymer. Worker exposure during transport and storage
will be limited to accidental spillage.
The notifier estimates that 200 to 500 workers in the building industry may be involved in
application of the sealant containing the notified polymer and could be using the sealant 8
hours/day, 5 days/week. Dow Corning 991 Silicone High Performance sealant is applied in a
continuous manner under a positive pressure to fill and seal the joint properly. The notifier
recommends the use of a tool with a concave profile for keeping the sealant within the joint.
Most of the work will be conducted on outdoor building sites and well ventilated areas where
vapours are unlikely to accumulate. Dermal exposure to the sealant may occur during the
application, and is expected to be main routine of occupational exposure. In cases where
uncured sealant is inadvertently applied to adjacent surfaces, the notifier recommends clean
up with a commercial solvent such as xylene, toluene or methyl ethyl ketone. Workers using
the sealant will wear goggles, rubber gloves (butyl, neoprene or nitrile) and overalls.
Building site waste is commonly collected and disposed of to landfill. At this point the sealant
should be cured and, although dermal exposure may occur, the notified polymer will not be
bioavailable.
7. PUBLIC EXPOSURE
Public exposure to Polyvest EP OC 800S by may occur in the event of spillage from broken
tubes or cartridges following a serious transport accident. In such instances, the sealant and its
containers will be cleared mechanically or taken up with absorbent material and disposed of
by incineration or as landfill and further public contact is not likely to occur.
The notified polymer will be sold through trade supply outlets. However it is intended for use
by experienced construction workers. Therefore public exposure is expected to be minimal.
8. ENVIRONMENTAL EXPOSURE
8.1 Release
The notifier estimates that up to 3 kg of the notified polymer will be disposed of in landfill
each year as residue in empty sealant cartridges.
The majority of the notified polymer is ultimately expected to be released to landfill within
the matrix of the end use product.
8.2 Fate
The majority (99%) of the notified polymer will be crosslinked with other components to
form a very high molecular weight and stable polymer matrix. Therefore once cured, the
notified polymer is expected to be immobile in the environment.
4 December 2001
FULL PUBLIC REPORT
NA/970 7/11
Empty import cartridges and any residual sealant they contain will be disposed of to landfill
where, on exposure to air, the sealant will cure and crosslink with other components to form a
high molecular weight polymer matrix and remain immobile in the environment. The notifier
indicates that some incineration of wastes containing the notified polymer may occur which
would produce water vapour and oxides of carbon.
The notified polymer is not expected to bioaccumulate due to its low water solubility
(Connell, 1990).
9. EVALUATION OF TOXICOLOGICAL DATA
No toxicological reports were provided for assessment.
10. ASSESSMENT OF ENVIRONMENTAL EFFECTS
No ecotoxicological data were provided for assessment.
11. ASSESSMENT OF ENVIRONMENTAL HAZARD
The notified polymer contains an anhydride functionality that is expected to react with
moisture in the air to form the corresponding dicarboxylic acid, which will crosslink with
other components in the sealant formulation to form a high molecular weight polymer matrix.
Therefore once cured, the notified polymer is expected to be immobile and pose little risk to
the environment.
Empty import cartridges and any residual sealant they contain will be disposed of to landfill
where, on exposure to air, the sealant will cure and crosslink with other components to from a
high molecular weight polymer matrix and as such should pose little risk to the environment.
The notifier indicates that some incineration of wastes containing the notified polymer may
occur which would produce water vapour and oxides of carbon.
The notified polymer is not expected to bioaccumulate due to its low water solubility
(Connell, 1990).
The low environmental exposure of the notified polymer as a result of the proposed use
indicates the overall environmental hazard should be low.
12. ASSESSMENT OF PUBLIC AND OCCUPATIONAL HEALTH AND SAFETY
EFFECTS
As no toxicological information has been provided for the notified polymer, it cannot be
classified against the NOHSC Approved Criteria for Classifying Hazardous Substances
(NOHSC, 1999b). Since the notified polymer has high NAMW, absorption across biological
membranes and resultant systemic toxicity would be limited.
4 December 2001
FULL PUBLIC REPORT
NA/970 8/11
The notifier classified Dow Corning 991 Silicone Hi-Performance Sealant containing <1%
notified polymer as a hazardous substance. Dow Corning 991 Silicone Hi-Performance
Sealant contains chemicals other than the notified polymer that are possible skin sensitisers
and carcinogens. In addition, methyl ethyl ketoxime (MEKO) and methyl alcohol may be
formed upon contact with water or humid air. Inhalation exposure to MEKO induced liver
cancer in male rodents. Methyl alcohol is on the NOHSC List of Designated Hazardous
Substances (NOHSC, 1999a) and has a NOHSC exposure standard (NOHSC, 1995).
Occupational Health and Safety
The notified polymer is to be imported at a concentration of up to 1% in an adhesive sealant
in tubes and cartridges. The health risk to transport and storage workers is low considering
the low concentration of the notified polymer in the sealant and its packaging.
Building industry workers will use the sealant. Most of the work will be conducted on
outdoor building sites and well ventilated areas where vapours are unlikely to accumulate.
The notifier recommends using a tool with a concave profile to keep the sealant within the
joint. Dermal exposure to the notified polymer during application may occur but is expected
to be low. However, dermal protection is necessary for worker handling the sealant product
because it contains possible skin sensitisers. In addition, precautions must be taken to avoid
skin contamination when cleaning up the excess sealant with organic solvents such as xylene,
toluene or methyl ethyl ketone. The notified polymer should at all times be used in well
ventilated areas. Protective gloves (butyl, nitrile or neoprene rubber), goggles and overalls
should be worn when applying the sealant containing the notified polymer, removing excess
sealant and disposing of uncured sealant to minimise the risk of adverse effects. Overall, the
health risk to workers using the sealant is expected to be low when the above exposure
control measures are adhered to.
Public health
Public contact with the sealant containing Polyvest EP OC 800S is likely to be minimal. As
the notified polymer is locked within the sealant at a very low concentration and unable to
leach out, the potential for direct contact with it is negligible. In the event of any direct
contact irritation of the skin or eyes is unlikely. Its high molecular weight will also minimise
absorption into the body and therefore systemic toxic effects are unlikely.
13. RECOMMENDATIONS
Control Measures
Occupational Health and Safety
? Employers should implement the following safe work practices to minimise
occupational exposure during handling of the notified polymer in the product Dow
Corning 991 Silicone Hi-Performance Sealant:
- The products containing the notified polymer should at all times be used in well
ventilated areas.
- Spillage of the notified polymer should be avoided. Spillages should be cleaned up
promptly with absorbents which should be put into containers for disposal.
4 December 2001
FULL PUBLIC REPORT
NA/970 9/11
? Employers should ensure that the following personal protective equipment is used by
workers to minimise occupational exposure to the notified polymer in the product
Dow Corning 991 Silicone Hi-Performance Sealant:
- overalls,
- goggles,
- protective gloves (butyl, nitrile or neoprene rubber).
Guidance in selection of personal protective equipment can be obtained from
Australian, Australian/New Zealand or other approved standards.
? A copy of the MSDS should be easily accessible to employees.
? If products and mixtures containing the notified polymer are classified as hazardous to
health in accordance with the NOHSC Approved Criteria for Classifying Hazardous
Substances, workplace practices and control procedures consistent with provisions of
State and Territory hazardous substances legislation must be in operation.
13.1 Secondary notification
The Director of Chemicals Notification and Assessment must be notified in writing within 28
days by the notifier, other importer or manufacturer:
(1) Under Section 64(2) of the Act:
- if any of the circumstances listed in the subsection arise.
The Director will then decide whether secondary notification is required.
No additional secondary notification conditions are stipulated.
14. MATERIAL SAFETY DATA SHEET
The MSDS for a sealant product containing the notified polymer was provided in a format
consistent with the National Code of Practice for the Preparation of Material Safety Data
Sheets (NOHSC, 1994).
This MSDS was provided by the applicant as part of the notification statement. It is
reproduced here as a matter of public record. The accuracy of this information remains the
responsibility of the applicant.
15. REFERENCES
Connell D. W. (1990) General characteristics of organic compounds which exhibit
bioaccumulation. In Connell D. W., (Ed) Bioaccumulation of Xenobiotic Compounds. CRC
Press, Boca Raton, USA.
4 December 2001
FULL PUBLIC REPORT
NA/970 10/11
National Occupational Health and Safety Commission (1994) National Code of Practice for
the Preparation of Material Safety Data Sheets [NOHSC:2011(1994)]. Australian
Government Publishing Service, Canberra.
National Occupational Health and Safety Commission (1995) Adopted National Exposure
Standards for Atmospheric Contaminants in the Occupational Environment,
[NOHSC:1003(1995)]. In: Exposure Standards for Atmospheric Contaminants in the
Occupational Environment: Guidance Note and National Exposure Standards. Australian
Government Publishing Service, Canberra.
National Occupational Health and Safety Commission (1999a) List of Designated Hazardous
Substances [NOHSC:10005(1999)]. Australian Government Publishing Service, Canberra.
National Occupational Health and Safety Commission (1999b) Approved Criteria for
Classifying Hazardous Substances [NOHSC:1008(1994)]. Australian Government Publishing
Service, Canberra.
4 December 2001
FULL PUBLIC REPORT
NA/970 11/11
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