Product description

imagine the possibilitiesTM

PARALOIDTM BPM-500 is an acrylic impact modifier specially designed to improve theimpact resistance of Polylactic Acid (PLA) resin used in the industry and more specificallyfor transparent packaging applications.

Thanks to the unique morphology of the modifier, blending PARALOIDTM BPM-500 with PLAimproves impact properties without sacrificing the transparency of the product.In addition to better impact properties, PLA modified with BPM-500 shows a markedimprovement in cutting and slitting as well as increased flexibility.

For over 30 years, acrylic impact modifiers from Rohm and Haas have led to the developmentand market recognition of many unique resins and brought Rohm and Haas a wealth of scientific and industrial experience. Today Rohm and Haas is committed to investing in programs that drive sustainabilityimprovements. PARALOIDTM BPM-500 provides the needed solution to allow a broader use of resins derivedfrom renewable resources.

PARALOIDTM BPM-500ACRYLIC IMPACT MODIFIER FOR POLYLACTIC ACID RESIN

R O H M A N D H A A S

Applications/uses

PARALOIDTM BPM-500 is especially useful inapplications where a balance between toughnessand transparency is a key. These include packaging applications, as well as industrialand consumer goods.

Impact performance

Improved impact properties are obtained withaddition levels as low as 3 %. Excellent impactperformance is obtained at higher use levels:the impact strength of PLA is increased threefold using BPM-500 at 5 wt% loading.

Optical Properties

Thanks to the combination of the nano-scale particle size and excellent dispersability of PARALOIDTM BPM-500 in PLA, the addition ofthe modifier has minimal effect on the clarity ofthe PLA film. The haze measured on a 15 milextruded sheet is less than 6% for up to 5 wt%of BPM-500 loading.

Figure 1- Dart drop impact (ASTM 5420) for PLA modified with BPM-500Extruded 4042D PLA sheet, 15 mil thickness

wt% PARALOIDTM BPM-500

wt% PARALOIDTM BPM-500

Ave

Tea

r Fo

rce

(grm

s-fo

rce)

Dar

t D

rop

Impa

ct

Table 1- Elemendorf tear resistance (ASTM 1922) Extruded 4042D PLA sheet, 15 mil thickness

% PARALOIDTM BPM-500 0 5 7.5

Ave Tear Force (grms-force) 208 550 922

15.00

10.00

5.00

0.000% 5% 7,5%

1000

900

800

700

600

500

400

300

200

100

00% 5% 7,5%

Neat PLA 5 wt% BPM-500 loading

Tear test

Neat PLA 5 wt% BPM-500 loading

Brittle failure Ductile failure

Dart drop impact

Tear resistance

PARALOIDTM BPM 500 enhances the tear resistanceand the cutability of PLA extruded sheets. The brit-tle nature of pure PLA could lead to uneven roughedges of the sheet during cutting and handling. Theaddition of BPM-500 increases the resistance of thefilm to tearing and improves cutting.

Physical description

Appearance: Free flowing white powderBulk Density: 0.48-0.56 g/cm3

Total residual volatiles: <1%

Processing Information

PARALOIDTM BPM-500 is supplied in a free flowing powder form. It is easily dispersed intoPLA by controlled addition of the additive duringmelt mixing in a twin screw extruder. A typicalheating profile for the twin screw extruder isshown in the table below.

For processing with PLA on a single screw extruderor other processing equipment, it is recommendedto blend pre-compounded PARALOIDTM BPM-500in PLA. The addition of PARALOIDTM BPM-500 at the recommended use levels under typical processingconditions does not affect the thermal stabilityof PLA. It is recommended that both the BPM-500 modifier and PLA resin be thoroughly dried tobelow 250 ppm moisture before compounding.

Regulatory Compliance

PARALOIDTM BPM-500 complies with EUDirective 2002/72/EC of 6 August 2002 whichgoverns food packaging in the European Union.In compliance to US Food and Drug Administration(FDA) requirements, PARALOIDTM BPM-500 maybe used up to 10% in food contact resins (maxi-mum thickness of 20 mil) with all types of food atroom temperature and below. We moreover recommend that you verify on a regular basis with your local Rohm and HaasOffice, the latest food status update of our product.

Storage, Handling and

Safety

Refer to the MSDS for guidelines

R O H M A N D H A A S

Zone 1 2 3 4 5 6 7 8

T°C 150 180 190 200 200 200 200 200

Table 2. Recommended twin-screw extruder temperature profile Figure 2- Haze measured on a 15 mil extruded sheet

wt% PARALOIDTM BPM-500

Mea

sure

d %

of

haze

8.00

6.00

4.00

2.00

0.000% 5% 7,5%

Neat PLA 5 wt% BPM-500 loading

We are nearby!

www.rohmhaas.com© ROHM AND HAAS COMPANY 2006

PARALOID is a trademark of Rohm and Haas Company.

We are nearby!

Find our nearest location and much more, at:

www.rohmhaas.com

Or e-mail us at:

BPMinfo@rohmhaas.com

Wherever you are,

ABOUT US

Rohm and Haas is a world class supplier. Our global presence, extensive

technology portfolio, worldwide infrastructure and network of plants,

technical service and sales offices provide customers with a

wide range of capabilities and depth of resource unmatched

by any other chemical company.

MAIN WORLDWIDE OFFICES

ASIA PACIFIC

Rohm and Haas China, Inc.Rohm and Haas Great China Technical CenterNo.1077 Zhang Heng Road, Zhang Jiang Hi-Thec ParkShanghai, CHINA 201203 Tel: 86 21 3862 8000 Fax: 86 21 3862 8414

EUROPE

Rohm and Haas France SASLa Tour de Lyon185 rue de Bercy75579 Paris Cedex 12Tel: 33 1 4002 5000Fax: 33 1 4345 2819

Rohm and Haas European Laboratories371 rue L.V. BeethovenSophia Antipolis06560 Valbonne FranceTel: +33-(0)4 93 95 53 53Fax: +33-(0)4 93 65 30 16

Rohm and Haas SwitzerlandLake Geneva Center 7 route de la Longeraie 1110 Morges Switzerland Tel: + 41 21 805 9000 Fax: + 41 (0) 21 805 9001

EASTERN EUROPE

Rohm and Haas MoscowBolshaya Akademicheskaya str., 5A, 4th floorMoscow 125299Phone: 7 495 642 94 22Fax: 7 495 642 94 32

Rohm and Haas IstanbulRohm and Haas Kimya Ticaret Ltd.Sti.Degirmen sok. Nida Kule no: 12 K: 18Kozyatagi34742 Kozyatagi - IstanbulPhone: 90-216-571-9100 or 21Fax: 90-216-416-2221

AMERICA

Corporate HeadquartersRohm and Haas Company100 Independence Mall WestPhiladelphia, PA 19106-2399Telephone: 215-592-3000Fax: 215-592-3377