MEBUST^® 1507S298 
IMPACT MODIFIERS FOR ENGINEERING RESINS

PRODUCT DESCRIPTION
Mebust^® 1507S298 series impact modifiers are based on novel acrylic chemistry designed to impart excellent ambient and cold temperature impact to PBT, PC and blends. The first all acrylic impact modifiers of their kind, Mebust^® 1507S298 allows processors to achieve lower temperature performance than previously attainable with conventional weatherable acrylic modifiers. Mebust^® 1507S298, a functionalized version, can be used to formulate polyesters and polyester blends for maximum impact, weatherability, viscosity control and physical properties.

PRODUCT BENEFITS
Excellent Weatherability– Mebust^® 1507S298 MBS impact modifiers provide the excellent weatherability acrylics are known for, opening the door for use in applications that demand good color hold and retention of physical properties on exposure to the
elements. This enabling technology is especially suited for mold-in color applications.

Superior Low Temperature Impact—The low Tg core of Mebust^® 1507S298 enables it to be used in low temperature applications, it can be used to create products which can withstand -40° to -50° C and still remain ductile.

Good Dispersion and Viscosity Control—Mebust^® 1507S298 can be used alone or with other additives to allow adjustment of polymer viscosity and impact modifier dispersion to give optimum processability and impact values in various polyester applications.

Balanced Property Control—Mebust^® 1507S298 impact modifiers have minimal effect on other polymer properties.

SUGGESTIONS FOR USE
Mebust^® 1507S298 series impact modifiers are recommended for use in PBT, P an polyester blends where superior low temperature impact and weatherability are required. As an enabling technology, Mebust^® 1507S298 MBS is targeted for use in automotive applications, lawn and garden equipment, and recreational vehicles where weatherability and good low temperature impact are important.

PACKAGING
Mebust^® 1507S298 impact modifier is packaged in 500Kg (1102.3 Lbs) corrugated boxes.

PERFORMANCE TESTING – POLYBUTYLENE TEREPHTHALATE

Mebust^® 1507S298 modifiers get their excellent low temperature performance from a rubber core which has a Tg lower than other commercial acrylics. The following comparative properties graph demonstrates the performance of Mebust^® 1507S298 versus a typical MBS impact modifier in polybutylene terephthalate.

Izod Impact Strength versus Mebust^® 1507S298 Loading – Mebust^® 1507S298 modifiers bring good low temperature impact to PBT. The following graph demonstrates how the loading of Mebust^® 1507S298 can improve the low temperature impact significantly.

Mebust^® 1507S298 modifiers have the excellent weatherability of an acrylic. The following graph shows the weathering performance of Mebust^® 1507S298 in PBT in a Xenon weather-o-meter using SAE J1885.

                       Heat Aging @ 135^oC - Impact Retention

Mebust^® 1507S298 exhibits good dispersion and interfacial adhesion which leads to maximized impact. The following AFM (atomic force microscopy) picture (in phase mode) shows the excellent dispersion of Mebust^® 1507S298 in polybutylene terephthalate.

Polycarbonate Heat Aging -10% loading of Mebust^® 1507S298 versus competitor’s MBS - the following graph illustrates the excellent impact retention that Mebust^® 1507S298 brings to polycarbonate, even at low use levels.

                       Heat Aging @ 135^oC - Impact Retention

Even at use levels as low as Mebust^® 1507S298 modifiers have been shown to contribute to outstanding low temperature impact while having a minimum affect on physical properties.

Effect of Impact Modifiers (5% loading) on Polycarbonate Impact

Effect of Impact Modifiers (5 tol0 wt.% loading) on Physical

PERFORMANCE TESTING – PC/PBT BLENDS

Mebust^® 1507S298 modifier also show good efficiency in various polyester blends such as PC/PBT. The following table demonstrates Mebust’s^® excellent ductility at low temperatures. Notched Izod impacts were determined in blends containing 20% impact modifier.

TECHNICAL SERVICES
PolyChem Alloy offers complete technical service and assistance to you in using Mebust^® acrylic modifiers. PolyChem Alloy has played a leading role in establishing testing procedures and industry standards for weatherability in exterior vinyl products. Our laboratories and personnel are ready to assist you with any phase of your evaluation from
formulation development to end product testing. For additional information on Mebust^® impact modifiers, please contact Customer Support @800-PCA-AND-U.

TOXICOLOGY–INDUSTRIAL HYGIENE
Prolonged skin exposure to this product directly or through contaminated clothing may lead to skin irritation and/or dermatitis. This product may be irritating to the eyes. The vapors given off by Mebust^® 1507S298 may be pungent and irritating to the respiratory system, especially if permitted to accumulate in a closed area. The product should be used with adequate ventilation to protect employees and to avoid conditions which could cause a dust explosion. If adequate ventilation is not available, a NIOSH approved high efficiency (HEPA) dust respirator should be used.

ENVIRONMENTAL AND SAFETY INFORMATION
Before handling this material, read and understand the MSDS (Material Safety Data Sheet) for additional information on personal protective equipment and for safety, health and environmental information.

For Environmental, Safety & Toxicology information, contact our Customer Service Department at 828/754-7570 to request a Material Safety Data Sheet. PolyChem Alloy believes strongly in Responsible Care as a Public Commitment.

Mebust^® 1507S298 acrylic modifier is a polymeric resin which when released in the environment does not present any particular hazard.

SUGGESTED FIRST AID
In case of eye contact, immediately flush with plenty of water for at least 15 minutes. Get medical attention if irritation persists. In case of contact, immediately flush the area with plenty of water. Remove contaminated clothing and shoes. Wash clothing before reuse. Get medical attention.

If inhaled, remove to fresh air. If breathing is difficult, get medical attention.

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