PARALOID™ K-435 Acrylic Processing Aid for Vinyl Foam Core Pipes and Foam Profiles

Product Description

PARALOID K-435 is a new ultra high molecular weight acrylic processing aid for high quality foam applications.

Applications

Its high foaming efficiency enables converters to meet the most demanding requirements in foam core pipes and foam profile formulations using lower addition levels. The cost performance balance of PARALOID K-435 in these applications is exceptional.

Benefits

The ultra high molecular weight of PARALOID K-435 gives the following performance properties:

Low torque Fusion adapted to latest equipment High melt strength High melt expansion Low density

PARALOID K-435 has enhanced powder properties, providing excellent resistance to compaction, thereby enabling bulk delivery.

Performance Characteristics

Expansion

Thanks to its high molecular weight, improved hot melt expansion without cell rupture is obtained with PARALOID K-435. This results in more uniform profiles with low density.

Density

The high efficiency of PARALOID K-435 enables a lower density to be obtained. The graph below illustrates this can be achieved at reduced addition levels when compared to a conventional high molecular weight process aid.

Torque

The slightly longer fusion time displayed by PARALOID K-435 results in lower extruder torque when compared to conventional grade. Due to this feature, high extrusion speeds and higher output is achievable without exceeding extruder torque limits.

Viscosity

As expected, the high molecular weight characteristics of PARALOID K-435 lead to slightly higher melt viscosity when compared to the conventional grade.

Formulations

Profile Formulations Pb Stabilized Celuka Formulation

S PVC K-57 100,00

Regrind 0 to 20

Dibasic Lead Phosphite 3,50

Lead Stearate 0,50

Calcium Stearate 1,00

Ester Wax 0,50

Oxidized PE Wax 0,40

Di Carboxylic Acid Ester Wax 0,80

Ground Calcium Carbonate 5,00

Rutile Titanium Dioxide 3,00

PARALOID K-435 5,00

Sodium Bicarbonate 1,60

Azo di Carbonamide 0,15

Profile Formulations Pb Stabilized Co-Ex Core Formulation

S PVC K-57 100,00

Regrind 0 to 20

Tribasic Lead Sulfate 3,00

Dibasic Lead Stearate 0,50

Calcium Stearate 0,60

Ester Wax 0,60

Oxidized PE Wax 0,40

Di Carboxylic Acid Ester Wax 0,80

Ground Calcium Carbonate 7,00

Rutile Titanium Dioxide 0,50

PARALOID K-435 5,00

Sodium Bicarbonate 1,60

Azo di Carbonamide 0,15

Processing

Brabender Rheology

PARALOID K-435 has been developed to take account of current trends in processing conditions. As such, compared with a conventional high molecular weight process aid, K-435 has a slightly longer fusion time. On large high output extruders, this will lead to lower screw torque.

Packaging and Handling

Packaging

As with most PARALOID products, the excellent powder properties enable PARALOID K-435 to be delivered directly in bulk. PARALOID K-435 is also available in heat sealed bags and FIBC semi-bulk units.

Handling Considerations

Being a powder, PARALOID K-435 is classified as belonging to the dust explosion class ST1. To ensure safe handling, the appropriate safety regulations should be observed. We recommend that the prospective users determine the safe handling procedures necessary for the user's applications before manufacturing products. A Material Safety Data Sheet, outlining hazards and handling methods, is available on request from your local Rohm and Haas sales office.

Morton International was purchased by Rohm and Haas Company in 1999.

Brabender Rheology in a Free Foam Type Formulation

Process Aid Type Addition Level phr

K-400 4.5

K-400 6.0

K-435 4.5

Fusion Time(s) 122 114 136

Equilibrium Torque (N.m) 35.3 36.4 34.4

Equilibrium Temperature (°C) 181 182 181

Powder Property

Aerated Bulk Denisty:

Spec: 0.35 to 0.45 (g/cc) typical values 0.38-0.42

Particle Distribution % on 600 µm % on 250 µm %<45 µm

spec 0 <15 <25

KST Class/Value Class 2 / kst=237

MIE 500-1000 mJ

Rohm and Haas Company is a raw materials supplier, not an end-use manufacturer of product. Development of a final formulation, testing, application, and ultimate performance of the end-use product is fully the responsibility of the formulator. These suggestions and data are based on information we believe to be reliable. They are offered in good faith but, as conditions and methods of use of our products are beyond our control, Rohm and Haas Company makes no warranties, either express or implied, concerning the final end-use product. Rohm and Haas Company expressly disclaims any implied warranty of fitness for a a particular purpose. We recommend that the prospective user determine the suitability of our materials and suggestions before adopting them on a commercial scale. Suggestions for uses of our product or the inclusion of descriptive material from patents and the citation of specific patents in this publication should not be understood as recommending the use of our products in violation of any patent, or as permission or license to use any patents of the Rohm and Haas Company. PARALOID, PARALOID EXL, ADVASTAB, ADVAWAX, ADVALUBE, ADVAPAK, ADVAFLEX, VINYZENE, BIO-PRUF, BIO-PRUF TREATED, ACRYLIGARD and EZ-FLO are trademarks of Rohm and Haas Company or of its subsidiaries or affiliates.

©Rohm and Haas, 2007 All rights reserved. March 2004