Sieve Plate Shore A90 TDI 100 Polyurethane Prepolymer

Price Negotiable

Price: FOB Qingdao usd3.0/kg

MOQ: 1mt

Delivery Time: 5-8 work days

Brand: EXCEEDCHEM

Product Description

TDI-100/Polyester Polyurethane Prepolymer Shore A90

1. Description

This is a TDI-100 based Polyester polyurethane prepolymer.

2. Characteristics

High oil resistance
Abrasive resistance
Good michanical performance

3. Applications

Sieve plate
Machine parts
Sealing ring
Roller

4. Typical properties

Type	Appearance	Viscosity(mPa.s/85℃)	NCO%	Packing(kg/drum)
	Solid	1300-1500	4.30-4.50	20/200

5. Operating Procedure

First, the prepolymer should be preheated in 80-85℃. Second, after vacumming, the prepolymer is to be mixed with melting MOCA evenly. Third, with degassing, casting into mould, and vulcanization,and then demould. Lastly, the finished product should be post vulcanized.

6. Reaction parameters

Item	MOCA (%)	Gel time(min)	Mixing temperature(℃)	Post vulcanization(h)
Specification	12.5	8-9	80/120	10

7. Finished products properties

Item	Hardness(Shore A)	Tensile strength(MPa)	Tear strength(KN/m)	Rebounding(%)
Physical properties	90	48-50	100-105	36

8. Effects of heating the prepolymer

The isocyanate(NCO) content of all prepolymers decrease with time and especially with exposure to heat. The table below shows the accumulated time taken at various temperatures to degrade prepolymers.