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
