BAYPREN® RUBBERPRODUCT PORTFOLIO
Chloroprene rubber from ARLANXEO, the first class­all-round polymer for a wide range of applications
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WHAT ISBAYPREN®

PROPERTIES OFBAYPREN®

About Baypren®

Crystallization

Chloroprene rubber (international ASTM/DIN-abbreviation:CR) is a high-performance material with a wide variety ofapplications. Baypren® is the brand-name of the ­ARLANXEO
range of polymers based on 2-chloro-1,3-butadiene (chloro­prene), which are manufactured by water-based emulsion
poly­merization. The importance of Baypren® is derived­essentially from its attractive combination of key properties which are unmatched by any other kind of rubber at acomparable price. This has led to the development of many
product v­ ariants to meet diverse requirements.
Properly formulated Baypren® compounds are suitable
for moldings and extrudates of all kind. Articles prepared
thereof cover reinforced hoses, roll covers, belts, i­ncluding
conveyor belts, air spring bellows, cable sheathing andinsulation for low-voltage cables, foams, including open
and closed-cell foamed rubber, corrosion-resistant l­inings,
sheeting, fabric proofings and footwear (boots). The ­inherent
flame-retardancy of Baypren® vulcanizates can be a
­ djusted
to meet special requirements.

A key property of stereoregular polymers is their tendency
to crystallize. Polymers like natural rubber or chloroprenerubber harden due to the formation of microcrystallites. The
crystallization speed is influenced by the regularity of thepolymer chain, the more regular the higher the t­endency
for orientation of the macromolecules and the faster the­crystallization rate.
Hardness due to crystallization is fully reversible and canbe removed by subjecting the crystallized material to heator dynamic stress. Hardness due to crystallization is not­connected to hardening of the product when going intoa glassy state. Below the glass transition temperature, all­polymers have significantly increased moduli.

Effect of sulfur modification
facilitates mastication of the rubber, permitting the production of soft compounds with good building tackonly magnesium oxide and zinc oxide required for­vulcanization
better tear resistance than standard grades
better adhesion to fabrics than standard grades
better dynamic properties
Effect of xanthogen disulfide (XD) modification
lower elasticity (less “nerve”) means easier processing(by calendering or extrusion)
better mechanical properties than standard grades in thesame formulation
higher filler loadings possible

The tendency of polymers to crystallize can be influenced
by an appropriately controlled production process. For
this ­reason, rubber articles based on Baypren® with a lowtendency to crystallize, display virtually no increase in­hardness due to crystallization even after exposure to low­temperatures for a long period of time. In contrast, polymers with a particularly pronounced tendency to crystallize,­display an increase in hardness already after a relatively
short time.

Modification
The properties of Baypren® rubber are influenced by thetype of modification of the raw polymer.
Effect of pre-crosslinking
reduction of the elastic resilience (snappiness) of the raw
rubber and uncured compound
reduction of the die swell
improvement in calendering behavior
improvement of the surface smoothness of injection-­molded and extruded articles
improvement of the dimensional stability, e. g. of uncured
profilesSupply form of Baypren® solid rubber grades: chips

2Air spring

3

PROPERTIES OFBAYPREN®
Properties of vulcanizates based on Baypren®

Aging and heat resistanceResistance to water and chemicals

Abrasion resistanceWith the correct formulation, finished products made ofBaypren® display the following characteristic outstanding
properties in addition to their excellent rubber-elastic behavior:

Baypren® vulcanizates stabilized with an optimized anti­oxidant system, display excellent aging resistance. Theyneither soften nor harden at high temperatures or over long
periods of stress and remain elastic and useable. The heat
resistance of Baypren® vulcanizates is considerably better
than that of natural rubber vulcanizates. It also exceeds theheat resistance of nitrile rubber.

Baypren® vulcanizates are resistant to water, acids, alkaline solutions and a large number of industrial chemicals.
With a good resistance to hydrocarbons, Baypren® vulcanizates show sufficient performance in contact with mineraloils to make them suitable for many applications. The corresponding volume change in mineral oils decreases withincreasing naphthenic and, in particular, paraffinic contentof the oil. Baypren® vulcanizates have a swelling resistancethat is considerably better than that of vulcanizates basedon styrene-butadiene rubber, natural rubber or ethylene-­
propylene diene rubber.

Baypren® vulcanizates are highly wear-resistant. Their abrasion resistance is similar to that of nitrile rubber.

resistance to weathering, both in dry and humid climates
excellent combustion behavior
good aging and heat resistancegood tensile strength, tear and wear resistancehigh dynamic fatigue resistanceresistance to water and a large number of chemicals overa long period
good adhesion to reinforcing substrates consisting of­textiles, metals or glass fibers
resistance to fungi and soil bacteria
low gas permeability
Thanks to its excellent set of properties, Baypren® is being
used for the production of highly stressed rubber articles inmany sectors, primarily in the automotive industry, mechanical engineering, plant construction, ship-building, mining
and mineral oil production. The properties of Baypren®
vulca­nizates are influenced by the type of modification ofthe raw polymer (see above).

Wiper blade

4Weathering and ozone resistance
While vulcanizates produced from many other rubbers
tend to crack and harden relatively quickly and degrade
when exposed to weathering and/or ozone, properly com­pounded Baypren® vulcanizates do not exhibit any significant ­deterioration, even after many years of exposure toatmospheric influences such as light, UV, rain, i­ndustrial
gases, ozone and oxygen. Weathering experiments in an
ozone athmosphere show that technical rubber goods
based on Baypren® display sufficient elasticity for the majority of static applications (for example structural profiles)
even after 50 years of continuous operations.

Resilience
Properly formulated Baypren® vulcanizates feature very
good resilience, although they do not attain the level of natural rubber. Very good resilience values are achieved in vulcanizates with a relatively high hardness.

Dynamic fatigue resistanceResistance to fungi and bacteria
Technical rubber goods that are in contact with soil for long
periods of time are susceptible to be attacked by soilborne
bacteria and fungi. In the long term, this can lead for example to destroyed underground cables. In contrast to themajority of other rubber types, Baypren® displays superior
resistance to these microorganisms. This resistance can beenhanced through suitable compounding.

Baypren® vulcanizates are highly resistant to dynamic fatigue. Special grades are available to meet extremely stringent specifications, such as those applied to drive belts. For
these grades the loss factor and hence the heat build-up
under dynamic load are particularly low.

Hydraulic hoses

5BAYPREN® APPLICATIONSIN THE BUILDING AND
THE CABLE AND WIRE INDUSTRY
Deformation properties

Gas impermeability

Baypren® vulcanizates have a low compression set over awide temperature range. The low-temperature compression
set is a key value employed in the assessment of vulcani­zates for use in seals. At higher temperatures, where aging
also plays a role, the compression sets are lower than thoseof a large number of other elastomers.

Baypren® vulcanizates have a very low gas permeability,
which is roughly equivalent to that of nitrile rubber.

Cables and wires
Rubber-sheathed flexible cables for heavy-duty applications in hoisting gear and transport and conveyor­systems
Rubber-sheathed flexible cables for heavy-duty applications in underground and surface mining applications
Rubber-sheathed flexible cables for use in dry and wet
conditions in domestic appliances and light-duty workshop equipment
Rubber-sheathed flexible cables with suspension unit forelevators and conveyor systems
Trailing cables for use in dry and wet conditions and also
in underground applications where service conditions aresevereTheater cables for mobile light fittings and light support
structures
Welding cables
Flat flexible power and control cables for use in dry andwet conditions and also outdoors, especially for transport systems, machine tools and processing machines
Flat flexible lighting cables

Combustion behavior
Baypren® vulcanizates can be compounded for improved
combustion behavior. The inherent flame retardancy of thepolymer itself means that even stringent end-user specifications can be met. Limiting oxygen index (LOI) values
above 50% can be attained with Baypren®. For example demanding specifications for flame retardant conveyor belts
in underground mining applications can easily be met byproperly compounded Baypren®.

Low-temperature flexibility
The glass transition temperature of Baypren® polymers remains fairly constant almost irrespective of the polymers’
tendency to crystallize. The brittleness temperature and theglass transition temperature of Baypren® vulcanizates canbe reduced to below -50°C by an appropriate compound
formulation. Where rubber parts made of Baypren® arerequired to remain flexible at low temperatures over longperiods, grades with a low crystallization tendency are re­commended.

Electrical properties
Baypren® is highly suitable for cable sheathing and, in manycases, for low-voltage insulation. It is recommended for theuse in cables that must have an excellent weathering, ozone,
oil and aging resistance as well as a good flame r­ etardance.
The thermal conductivity and coefficient of thermal expansion of Baypren® vulcanizates are comparable with otherelastomers. The values obtained are, of course, largely influenced by the compound formulation. The thermal insulationis also similar to that of the majority of plastics used in theconstruction industry today.
6CablesConveyor belt

7

BAYPREN® APPLICATIONSIN THE AUTOMOTIVEAND GENERAL INDUSTRY
Hoses

Conveyor and transmission belts

Hydraulic hoses for high pressure and ultra-high p­ ressure
Reinforced hoses for medium pressure and low pressure
Brake hoses
Oil and fuel hoses
Hoses for use in the petroleum industry
Floating hoses

Power transmission belts for the automotive and generalindustry– Poly-V-belts– Raw-edge V-belts– Jacketed V-belts– Timing belts
Conveyor belts with steel cord and textile reinforcement
for underground mining applications, steel works, m­ ineralprocessing plants and the chemical industry

Molded parts
Bellows and dust caps
Axle boots
Round-section sealing strips, O-ring seals and flat seals
Membranes
Air springs
Dampers and bearings with and without metal inserts,
e. g. load bearing pads for high buildings and bridges
Windshield wiper blades

Other
Foamed rubber sheets for wet suits and for the production of punched seals
Covers for rollers in the printing industry and also in the
textile and paper sectors
Rubberized fabrics for all types of tarpaulins, containers
and boats, and membranes in the automotive sector

Air spring

Belts

Diving suitHydraulic hoses

89

BAYPREN®
PRODUCT RANGE
Product

Crystallization
rate

Mooneyviscosity(1)ML (1+4)
100°C

Density(g/cm3)
approx.

Packaging

Remarks

General purpose grades
Baypren® 110very low

41 ± 5

1.23

paper

Baypren® 110very low

49 ± 51.23

paper/PE

Baypren 110

very low

65 ± 7

1.23

PE

Baypren® 112

low

41 ± 8

1.23

paper

Baypren 210

medium43 ± 41.23

paper/PE

Baypren® 210

medium

48 ± 41.23

paper/PE

Baypren 211

medium39 ± 4

1.23­

paper

Baypren® 230

medium100 ± 8

1.23

paper

Baypren 230

medium108 ± 10

1.23

paper

®

®

®

®

25 kg paper bags withPE (2) inner bags
40 bags pallet = 1,000 kg net;
35 bags pallet = 875 kg net;
20 kg PE bags
50 bags per box = 1,000 kg net

excellent physical­properties, good oil
resistance, flame­retardancy and highweathering and ozone
resistance; standard grades for best
aging resistance

Xanthogen disulfide-modified grades
Baypren® 116very low to low

43 ± 5

1.23

paper

Baypren® 116very low to low

49 ± 5

1.23

paper

Baypren 126

very low to low

70 ± 71.23

paper/PE

Baypren® 216

medium43 ± 5

1.23

paper

Baypren® 216

medium49 ± 5

1.23

paper

Baypren® 114

very low

62 ± 10

1.23

PE

Baypren 214

medium55 ± 6

1.23

paper

Baypren® 215

medium50 ± 61.23

paper/PE

Baypren® 510

low to medium

42 ± 5

1.23

paper

Baypren® 510

low to medium

50 ± 5

1.23

paper

Baypren® 611

low to medium

43 ± 6

1.23

paper

Baypren 611

low to medium

48 ± 6

1.23

paper

Baypren® 711

low to medium

43 ± 6

1.23

PE

Baypren® 711

low to medium

48 ± 6

1.23

PE®

see above

excellent mechanicalproperties due toformation of perfect
network

see above

especially designed forextrusion application

see above

suitable for mastication;easy to process; fordynamic applications

Precrosslinked grades®

Sulfur-modified grades

®

(1)
(2)

FOR MORE INFORMATION
PLEASE CONTACT US

unmassed (ISO 289)
PE-innerlayer 0.05 mm thick, Vicat softening point DIN 53460 ca. 75°C®
®
Fast crystallizing
Nomenclatureof theBaypren
Baypren
ALX
standardgrades rubber grades

First digit: Tendency to crystallize

Third digit: Special properties

1=low0=standard grades2=

medium

1+2

=

5+6+7

=

sulfur-modified grades

special characteristics,e. g. regarding viscosity or crystallization

Second digit: Viscosity

4=

pre-crosslinked grades

1low

5

=

pre-crosslinked and XD-modified grades

6=

XD-modified grades=2=medium

3

=

high

10

Make use of our experience!

Your contact to Baypren® experts

Inventing the future together
Research and development plays a key role at ­ARLANXEO.
The High Performance Elastomers business unit has research and technical centers with testing facilities on ­almost
every continent. Whether you are looking for better compounding ideas or are thinking about developing a newproduct, our experts will support you.

baypren@arlanxeo.com

For direct information, please contact our technical s­ upportservice. Our Baypren® experts are looking forward to a­ nswer
your questions.
11Trial product:(VP = Versuchsprodukt = trial product). The information contained herein is merelypreliminary. Testing to properties and applications is not final. Further information,
including data which could change or add hazards with use, may be developed by
the manufacturer, the user or a third-party institute. Such information may be needed
to properly evaluate or use this product. Use is undertaken at the sole risk of the user.
Quality & Environmental Management:
Baypren® is produced under strict control regarding safety, environmental protection
and quality. The whole supply chain, from production to customer service, is coveredby ISO 9001 and ISO 14001 certification.
Product Safety:
Relevant safety data and references as well as the possibly necessary warning labels
are to be found in the corresponding safety data sheets.
Health and Safety Information:
Appropriate literature has been assembled which provides information concerning the health and safety precautions that must be observed when handling the­ARLANXEO products mentioned in this publication. For materials mentioned which
are not ARLANXEO products, appropriate industrial hygiene and other safety precautions ­recommended by their manufacturers should be followed. Before working
with any of these products, you must read and become familiar with the available­information on their hazards, proper use and handling. This cannot be overemphasized. ­Information is available in several forms, e.g., material safety data sheets and­product labels. Consult us through your ARLANXEO representative or the Health,Safety, Environment and Quality Department (HSEQ) of ARLANXEO.

Portfolio/Edition 2019
© 2019 ARLANXEO. All rights reserved.

ARLANXEO Deutschland GmbH
Alte Heerstraße 241540 Dormagen, Germany
www.arlanxeo.com
www.baypren.com
baypren@arlanxeo.com

Regulatory Compliance Information:
Some of the end uses of the products described in this publication must comply withapplicable regulations, such as the FDA, BfR, NSF, USDA and CPSC. If you haveany questions on the regulatory status of these products, contact your ARLANXEO
representative.
The manner in which you use and the purpose to which you put and utilize ourproducts, technical assistance and information (whether verbal, written or by wayof production evaluations), including any suggested formulations and recommendations, are beyond our control.
Therefore, it is imperative that you test our products, technical assistance and­information to determine to your own satisfaction whether they are suitable for yourintended uses and applications. This application-specific analysis must at least­include testing to determine suitability from a technical as well as health, safety, andenvironmental standpoint. Such testing has not necessarily been done by us. Unless
we otherwise agree in writing, all products are sold strictly pursuant to the terms of
our standard conditions of sale, which can be found at the ARLANXEO homepage.
All information and technical assistance is given without warranty or guarantee andis subject to change without notice. It is expressly understood and agreed that you
assume and hereby expressly release us from all liability, in tort, contract or otherwise, incurred in connection with the use of our products, technical assistance andinformation.
Any statement or recommendation not contained herein is unauthorized and shallnot bind us. Nothing herein shall be construed as a recommendation to use any
product in conflict with patents covering any material or its use. No license is implied
or in fact granted under the claims of any patent.