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Benzene, ethenyl-, polymer with 1,3-butadiene

HONG KONG PETROCHEMICAL CO. LTD.

MATERIAL SAFETY DATA SHEET

High Impact Polystyrene (Polystyrene modified with Elastomers)

IDENTIFICATION

Trade Name : HK PETRO, High Impact Types

Common Name : High Impact Polystyrene, HIPS

Chemical and Other Names : Rubber modified Polystyrene; BS, SB (Butadiene-Styrene
thermoplastic resin)

CAS Number : 9003-55-8

PHYSICAL AND CHEMICAL PROPERTIES

Appearance, physical state : Cylindrical pellets, diameter and length about 3 mm
Odour : Odourless
Colour : Natural (translucent milky)
Solubility in water : Insoluble
Solubility in organic solvents : Soluble in aromatic and halogenated hydrocarbons, esters, ketones
Softening point
80-95oC
(Vicat temperature) :
180-250oC
Processing temperature :
> 300oC
Decomposition temperature :
> 450oC
Self-ignition temperature :
1040 kg/m3
Specific gravity :
650 kg/m3
Bulk density :

NOTE

Styrene polymer obtained in presence of a butadiene based rubber

Other Components

Antioxidants
Lubricants
Residual monomer : Styrene
1,3 Butadiene

Hazardous Reactions
None.
The product is stable in normal handling and storage conditions. It is combustible and by direct ignition
it burns with a sooty flame. Since the elements contained in HK PETRO High Impact types are C
(carbon) and H (hydrogen), by its complete combustion only CO2 (carbon dioxide) and H2O (water
vapor) develop.
Overheating/pyrolysis develops fumes made up of monomers, low polymers and their corresponding
oxidation products.

CLASSIFICATION AND LABELLING

Classification (EEC Directive 67/548 and following amendments, Italian Ministerial Decree
25.07.1987 No. 555) : not requested.

TOXICOLOGICAL INFORMATION, EXPOSURE LIMITS

No evidence of acute/chronic toxicity have been reported.
Powder may cause eyes and/or respiratory organs irritation.
During processing traces of monomers may develop.
Exposure limits (ACGIH 1990-1991) are the following :
* powders of the product : no specific limit assigned
* monomers possibly developed during processing :

TLV-TWA mg/m3 : 213
- Styrene
- Butadiene TLV-TWA mg/m3 : 22

STORAGE

Packaging : 25 kg polypropylene woven or polyethylene bags

The product can be stored and shipped in bulk.

Special Recommendations

- Keep away from sources of ignition, heat and sparks and from flammable products
- In storage and working areas avoid pellets spillage as a possible cause of slippage
- Avoid contact with solvents and with strong oxidizing agents
TRANSPORT REGULATIONS

National : F.S. All.7 : N.P.
: M.M.M. : C.N.P.

International : RID-ADR : N.P.
: IMO : N.P.
: ONU : --
: IATA : N.P.

Other Information : CEFIC TEC (R) : SK N.P.
: Panel : N.P.

HANDLING AND PROCESSING INFORMATION

Protective Equipment :

- In normal conditions masks with antidust filter shall be available when requested.
- In case of fire / overheating, toxic gas and fumes are developed and self-contained breathing apparatus
has to be used when requested.

Special Precautions :

- During the processing (moulding, extrusion) vapour of styrene monomers, and possibly trace of
butadiene, may develop; particularly at unusually high processing temperatures (>> 250oC).
- Work rooms must be provided with adequate ventilation and/or fume and dust collectors, so as to
prevent their concentrations to exceed the fixed TLV-TWA values (see above : Toxicological
Information).
- Use gloves and other suitable protective items, when requested.
- During extrusion under vacuum monomers and/or other low boiling substances are extracted so water
waste treatment may be requested before discharging.
EMERGENCY AND FIRST AID PROCEDURES

First Aid :

- Contact with eyes (dust) : wash with plenty of water.
- Inhalation (dust or fumes from thermal degradation) : remove the patient from polluted area; require
medical assistance.

Spills / Leaks :

- Collect mechanically.
- Not reusable products may be disposed in a controlled landfill or burned in incinerator, according to
national and local rules.

Fire :

- The product is combustible (see above : Hazardous Reactions).
Heat of combustion : about 10,000 kcal/kg
- Recommended extinguishing media : water spray, foam, dry chemicals, carbon dioxide.
- Suitable protective devices have to be used by operators employed in extinguishing fire and removal
of residual combustion product.

Address : Hong Kong Petrochemical Co. Ltd.
12 Wang Lok Street
Yuen Long Industrial Estate
Yuen Long, N.T.
Hong Kong

Tel : (852) 2443-1111
Fax: (852) 2443-0230

Note :

The product information in this data sheet is to the best of Hong Kong Petrochemical Co. Ltd.??s
knowledge to be correct as at the date of publication.

Date of first publication : February, 1995
Date of second publication : January, 1999
Date of third publication : September, 2007

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