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Impact modifiers: product lines reviewed.



Company's polybutenes improve impact resistance of many types of thermoplastics, including crystal PS, high-impact PS, PP homopolymer, and elastomer-modified PP. Polybutenes are clear and stable viscous polymers with low odor and resistance to thermal degradation, making them well suited for use in thermoplastics. Products are available in a wide range of viscosity grades.

In PS, polybutenes can improve impact resistance and melt flow. When polybutenes are used in place of mineral oil, the physical properties of PS are less affected and there is an improvement in the impact resistance.

In modified PP and in resin which has been modified with a thermoplastic elastomer (TPE TPE Thermoplastic Elastomer
TPE Terminal de Paiement Electronique (French)
TPE Total Power Exchange
TPE Twisted Pair Ethernet
TPE Tampines Expressway (Singapore)
TPE Therapeutic Plasma Exchange
), polybutenes are said to dramatically improve impact resistance. This suggests that polybutenes may be used to enhance impact strength and partially replace more expensive TPE.

ATOCHEM NORTH AMERICA, INC inc - /ink/ increment, i.e. increase by one. Especially used by assembly programmers, as many assembly languages have an "inc" mnemonic.

Antonym: dec.

Offers its Metablen C series of MBS See Mb/sec.

MBS - mobile broadband services
 impact modifiers for use with rigid PVC PVC: see polyvinyl chloride.
 in full polyvinyl chloride

Synthetic resin, an organic polymer made by treating vinyl chloride monomers with a peroxide.
 products. A patented manufacturing process reportedly ensures consistency from lot to lot, guaranteeing a quality impact modifier that contributes to the uniformity of PVC compounds. Products are sanctioned by FDA FDA
Food and Drug Administration

FDA, See Food and Drug Administration.

FDA, the abbreviation for the Food and Drug Administration.
 as an additive for food-grade PVC. Each product is designed for specific applications, with no detrimental effect on heat stability, and are low in gels. Metablen C products are packaged in 20 kg polyethylene-lined bags, palletized.

Company also offers Durastrength 200, all-acrylic modifier for rigid PVC.


Company's Hycar RLPs are functionalized butadiene and butadiene-acrylonitrile liquid polymers, which enhance properties of epoxy, polyester, urethane, acrylic, and bismaleimide resin systems. Characteristics include impact/crack resistance, thermal stress resistance, flexibility, low-temperature property control, chemical/corrosion properties retention, and adaptability to co-cure or synthesis.


Manufactures a line of liquid 1,2-polybutadienes and 1,2-polybutadiene-styrene copolymers for use as low-temperature impact modifiers in polyolefins, styrenics and TPE. Products are called Ricon and have application in PP, peroxide-cured PE, as cross-linking polymers, and also in TPE.



Manufactures several types of elastomers for use in improving the impact resistance of a variety of thermoplastic resins. EPsyn brand EPDM EPDM Ethylene-Propylene-Diene-Monomer
EPDM Enterprise Product Data Management
EPDM Ethylene Propylene Dimonomer (industrial/commercial piping/plumbing components)
EPDM Engineering Product Data Management
 is used for olefinics, NYsyn brand NBR NBR Number
NBR Nightly Business Report (PBS show)
NBR National Business Review (New Zealand weekly business newspaper)
NBR National Bureau of Asian Research
NBR National Board of Review
 and COPO COPO Central Office Production Order
COPO Common Poorwill (bird species Phalaenoptilus nuttallii)
COPO Commonwealth Own Purpose Outlays
COPO Court of Public Opinion
COPO Central Order Processing Office
 brand SBR SBR - Spectral Band Replication  for styrenics, and TERsyn brand impact modifier for engineering plastics. NYsynblak brand NBR black masterbatches are used as combination impact modifiers/black concentrates for ABS.

Company's Customer Applications Development Center can provide technical service assistance and compound recommendations for both impact modification and thermoplastic elastomers.


Offers chlorinated chlorinated /chlo·ri·nat·ed/ (klor´i-nat?ed) treated or charged with chlorine.


charged with chlorine.

chlorinated acids
some, e.g.
 polyethylene (CP), which is used as a weatherable modifier for rigid vinyls.


Company's toughening technologies involve four major families of modifiers: ethylene terpolymers, ionomers, grafted polyolefins and elastomers. This broad range of technologies is key in optimizing compatibility between modifier and base polymer.

*Ethylene terpolymers provide impact resistance over a broad temperature range and particularly at low temperatures for a wide variety of thermoplastics and thermosets thermosets, materials that can not be softened on heating. In thermosetting polymers, the polymer chains are joined (or cross-linked) by intermolecular bonding. Thermosets are usually supplied as partially polymerized or as monomer-polymer mixtures. . In thermoplastics, ethylene terpolymers are said to offer excellent potential for improving the impact resistance of PVC, ABS, SAN, SMA (1) See SMA connector.

(2) (Shared Memory Architecture) See shared video memory.

(3) (Software Maintenance Association) A membership organization that began in 1985 and ended in 1996.
, thermoplastic polyesters (including recycled materials) and polycarbonate. In PVC they offer two key benefits in addition to higher impact: 1) improved weatherability and 2) easier processing resulting from a reduction in melt viscosity. Weatherability is also improved in ABS. Thermoset A polymer-based liquid or powder that becomes solid when heated, placed under pressure, treated with a chemical or via radiation. The curing process creates a chemical bond that, unlike a thermoplastic, prevents the material from being remelted. See thermoplastic.  applications include phenolics, polyesters and epoxies.

*Ionomers - Company's Surlyn ionomer ionomer (īon´mr),
n a polymer containing ion.
 resins provide low-temperature impact properties in nylon 6. In TPOs, ionomers enhance abrasion resistance and paintability.

*Specialty polyolefins and elastomers - In reinforced PP and PE compounds, company's Fusabond anhydride-grafted polyolefin modifiers improve toughness by increasing adhesion between reinforcements and the resin matrix. Another polyolefin, VLDPE VLDPE Very Low Density Polyethylene  (very low-density PE), has the potential as a low-cost toughener for filled and recycled PE materials.

*Thermoset elastomers - In TPOs, EPDM rubber is a standard modifier. In SMC SMC Saint Mary's College
SMC Santa Monica College
SMC Solaris Management Console
SMC Smooth Muscle Cell
SMC Small Magellanic Cloud (also see LMC)
SMC Safety Management Certificate (maritime shipping) 
 and BMC (BMC Software, Inc., Houston, TX, A leading supplier of software that supports and improves the availability, performance, and recovery of applications in complex computing environments. , company's Neoprene neoprene: see rubber.

Any of a class of elastomers (rubberlike synthetic organic compounds of high molecular weight) made by polymerization of the monomer 2-chloro-1,3-butadiene and vulcanized (cross-linked, like rubber), by sulfur,
 rubber functions as both a low-profile additive and an impact modifier.


Manufactures Expancel line of expandable thermoplastic microspheres used as blowing agents and low-density fillers. Areas of application for Expancel as an impact modifier are thermosets, coatings and elastomers.

Microspheres create a syntactic foam with defined pore size, closed cell structure and resilient voids. The resilient nature of Expancel allows deformation without breakage, thereby improving impact resistance and stress.

Further applications are found in elastomeric materials where the resiliency of Expancel improves compatability between filler and binder material.


Company's Exxelor brand modifiers are a family of polyolefin-based polymers which can be used to improve the end-use performance of a variety of thermoplastic resins. Exxelor modifier grades are available to improve both low-temperature impact down to -40 F and room-temperature impact properties.

A group of products in this family are functionalized and can be used to modify engineering thermoplastics, polyolefins, glass-reinforced and filled compounds, and alloys or blends of engineering thermoplastics and polyolefins.

Exxelor modifiers posses excellent thermal stability and long-term heat and weathering resistance. The functionality also lends itself to use as a modifier and compatibilizer for engineering thermoplastics.

Two new grades, PO 2011 and PO 2021, have been added to the Exxelor family. Developed to improve the impact and heat-distortion performance of mineral- and glass-reinforced polypropylene compounds, they reportedly act as compatibilizers in blends of PP and nylon. At levels between 3% and 5%, the new grades are said to improve heat-distortion temperature of reinforced PP by up to 45 F. Both modifiers can be used as compatibilizers in homopolymer and copolymer blends of PP and nylon up to a 50:50 ratio.



Company's Stereon line of block copolymers of styrene and butadiene are used for impact modification of thermoplastic resins. Stereon 721A and 730A are effective graft bases for impact enhancement of high-impact PS and ABS. Products are available in baled form and are usually incorporated directly into the polymerization polymerization

Any process in which monomers combine chemically to produce a polymer. The monomer molecules—which in the polymer usually number from at least 100 to many thousands—may or may not all be the same.
 stream. Stereon 840A is a pelletized, multiblocked copolymer that, when dry-blended with PS, PP or PE resins, will improve impact, flexibility, and tear strength. Stereon 840A can be used to upgrade regrind streams and provide impact improvement for degradable plastics. Stereon 900 is a high-styrene, pelletized copolymer designed to be dry-blended with 40-50% crystal polystyrene for extrusion and thermoforming of disposable drink cups, packaging, and medical devices.


Produces the following impact modifiers for PVC and other resins:

*High-efficiency impact modifiers - Blendex 336 and Blendex 338 are high-efficiency ABS impact modifiers that contain a high percentage of rubber. Blendex 336 provides transparency and is also used in specialty PVC applications where a high degree of stress whitening is desired. Blendex 338 is more efficient than 336 and provides the best low-temperature toughness.

*Clear impact modifiers - Blendex 405, 420 and 467 are ABS modifiers that are designed to toughen the polymer without detracting from its optical properties. White used primarily in clear PVC film and bottles, it can also be used in engineering thermoplastics. In addition to PVC, Blendex products can be used to modify and toughen other polymers such as polycarbonate and polyesters.

*High-heat impact modifiers - Blendex 702 and Blendex 703 are impact modifiers based on alpha methyl styrene. These modifiers are used to upgrade PVC compounds and other polymers having marginal service temperature performance.


Produces MBS/acrylic impact modifiers with the following properties:

*B-11A - Low impact, excellent clarity, noncrease-whitening.

*B-18A-1 - Medium impact, high clarity.

*B-22 - High impact, high clarity.

*B-28 - Excellent impact, medium clarity.

*B-31 - Medium impact, excellent clarity, noncrease-whitening.

*B-51 - Excellent impact, excellent clarity, noncrease-whitening.

*B-52 - Excellent impact and high clarity.

*B-56 - Ultra high impact, translucent

*B-58 - Ultra, ultra high impact, translucent.



Baymod A, ABS powder modifiers, including products for both rigid indoor and exterior weatherable applications, provide improved impact resistance and heat distortion temperatures for PVC alloys used for injection molding and extrusion. Typical applications include business-machine housings, profile extrusions, and semi-flexible or rigid, calendered thermoformable sheets.

Baymod ethylene vinyl acetate copolymers can be used as weatherable impact modifiers for rigid vinyl extrusions such as window profiles, or as "permanent plasticizers" for flexible compounds that require improved extraction resistance and aging properties.


Produces impact modifiers for ABS, HDPE HDPE
high-density polyethylene
, PP, PVC, and polystyrene/ABS blends under the trade name Novalene.

Novalene, an EPDM rubber, is suitable for use by molders and compounders of polypropylene and polyethylene and comes in a convenient dry-blending form. Company reports that the addition of Novalene in the prescribed amount, even to scrap, can raise Izod levels to the no-breaking point, even at very low temperatures. In general the Izod impact strength of pure Novalene is no-break at -20 F.

Novalor is a high-butadiene ABS powder for PVC and gives added impact strength and processability with less loading, according to the company.

ROHM AND HAAS Rohm and Haas Company (NYSE: ROH), a Philadelphia, Pennsylvania based company, manufactures miscellaneous materials. A Fortune 500 Company, Rohm and Haas employs more than 17,000 people in 27 countries. The annual sales revenue of Rohm and Haas stands at about USD 8.2 billion.  CO.

Company's Plastics Products business offers its Paraloid family of impact modifiers for vinyls and engineering plastics. Product range includes:

*Paraloid KM-300 series - an all-acrylic line of weatherable impact modifiers for vinyl extrusions subjected to outdoor exposure.

*Paraloid BTA (Business Technology Association, Kansas City, MO, A membership association of manufacturers, dealers, distributors and service companies in the business equipment and systems industries, founded in 1994.  series - a line of methacrylate-butadiene-styrene (MBS) impact modifiers for toughness in PVC sheet, film and containers used in clear or opaque packaging.

*Paraloid HT series - acrylic-imide-based modifiers for improvements in heat distortion properties of both clear and opaque vinyl.

Also offered is a wide product range of Paraloid EXL EXL Ethernet Accelerator
EXL Expiration Notice (insurance)
EXL Expression List
EXL Extended Learning
 impact modifiers designed for engineering resins. Included in the range are:

*EXL-3300 series - butyl-acrylate-based tougheners for polyesters and blends, PC and nylons.

*EXL-3600 series - MBS-based impact modifiers with high thermal stability for PC, PET, PBT PBT Provider Backbone Transport (networking technology adding determinism to ethernet)
PBT Polybutylene Terephthalate
PBT Profit Before Tax
PBT Paper Based Test (education) 
, and blends.

*EXL-4000 series - imide-methacrylate products for blending with nylons, PC, SAN, ABS and polyesters.


Company's Elastomers Business Center provides a diversity of SBS See Small Business Server.  and SEBS block copolymers for the impact modification of PS, engineering thermoplastics, and alloyed products.

SBS Kraton D polymer series is used for impact modification of polycarbonates, PPO PPO
preferred provider organization

PPO Managed care Preferred provider organization, see there Infectious disease Pleuropneumonia-like organism, see there
, and polyolefin blends. Kraton G 1901X, a functionalized polymer, is used for impact modification of engineering thermoplastics and for making polar and nonpolar nonpolar

not having poles; not exhibiting dipole characteristics.
 polymers compatible. SBS and SEBS polymers are also available in specific grades as low-profile additives for the production of BMC and SMC parts; Kraton G 1855X provides a class-A automotive finish. A variety of company's developmental polymer products are available for sampling for the purpose of modification of a wide range of materials.
COPYRIGHT 1991 Gardner Publications, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1991, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Title Annotation:1991-1992 Manufacturing Handbook and Buyers' Guide
Publication:Plastics Technology
Date:Jul 15, 1991
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