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Silyl Terminated Polymer / Silane Terminated Polymer

OSi HIOSil MS303 Silyl-Terminated Polyether

Chemical Name: OSi HIOSil MS303 Silyl-Terminated Polyether

Description

Product Description

Product Name: OSi HIOSil MS303

Chemical Name: Silyl-Terminated Polyether


Properties

OSi HIOSil MS303 is a Silyl-Terminated Polyether (STPE) used as a base resin for producing high performance moisture cure sealants, adhesives, and coatings.OSi HIOSil MS303 has performed successfully in various industrial applications and provides well-balanced properties such as durability, reactivity, and storage stability. This unique and highly valued balance of attributes is derived from the polyether polymer backbone coupled with the methyldimethoxysilane functional groups. 


Typical Technical Data

The below values are not intended for use in preparing specifications. Please confirm with us prior to writing specifications on this product.

Appearance: Light yellow liquid 

Hue (Gardner Color Number):G3 or less 

Viscosity: 10000 – 15000 cP 

Moisture: 0.1 wt% or less / 1,000ppm or less 

pH: 6.0 to 8.0


Features 

1. A middle modulus polymer with: 

a) Low viscosity 

b) Long shelf stability 

2. A formulated product based on OSi HIOSil MS303 will result in: 

a) Mid modulus 

b) Broad adhesion profile 

c) Multi-purpose product features 


Regulatory Information 

USA            TSCA                           Complies 

Japan      KASHINHOU/ENCS        Complies 

Europe     EINECS, ELINCS          Polymer Exempt 

Canada         DSL                           Complies


OSi HIOSil MS303 Starting Point Formula

                                                          PHR 

OSi HIOSil MS303                             100 

Plasticizer                                           55 

Calcium Carbonate                           120 

Titanium Dioxide                               20 

Thixotrope                                          2 

UV Absorber                                       1 

HALS                                                   1 

Dehydration Agent                             2 

Adhesion Promoter                            3 

Hardening Catalyst                             2


Formulated Properties of Representative Sample 

• Skin Formation Time (min): 20 

• Modulus 100 (psi/MPa): 122 / 0.84 

• Hardness (Shore A): 36 

• Tensile Strength (psi/MPa): 315 / 2.17 

• Elongation (%): 641 

• Compound Viscosity, HA (cP): 792,000 

Brookfield Viscometer (No. 7 rotor, 2 rpm) 


Applications 

• Joint Sealant 

• Building Envelope Sealant/Adhesive 

• Industrial Sealant/Adhesive 

• DIY Sealant/Adhesive/Caulk 

• Transportation Sealant/Adhesive


Processing and Mixing 

OSi HIOSil MS303 can be formulated into adhesives, sealants, and/or coatings utilizing either a hot or cold process. 

Please contact an OSi Holding Limited Representative for more information.


Storage

• Guarantee of six-month shelf life from delivery if stored appropriately. 

• Containers must be stored below 50°C/122°F, stored inside, and remain tightly sealed. 

• Please speak with an OSi Holding Limited representative regarding bulk storage requirements.


Remarks

This technical data sheet is only used for internal quality control within OSi Holding Limited.

All rights reserved.


Packaging

Bulk: 45,000 lbs/20,000 kg 

Tote: 2,205 lbs/1,000 kg 

Drum: 440 lbs/200 kg

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