Japan Shin-Etsu silicone oligomer type R KR470, X 40 2678

                                 

Silicone oligomer

Silicone oligomer is a relatively low molecular weight silicone resin. Due to its structural characteristics, it is used as a resin monomer and as a modification of organic resin As an interfacial modifier, it plays a big role and is a very unique product.

(1) As a resin monomer

Main features: waterproof, weather resistance, high hardness

Applications: Body Coatings, Floor Coatings, Hydrophobic

(2) As an organic resin modifier

Main features: adhesion, weather resistance, water resistance

Applications: substrates, sealing materials, adhesives, adhesives, coatings for building materials

Type R

As a reactive functional group, this is a silicone oligomer that only has epoxy groups and can be cured by anhydride, light, and thermal cations. It has the same curing mechanism as epoxy resin, but has the heat resistance and high Tg of siloxane. In addition, the type having a cyclic siloxane skeleton has a feature that it shrinks less when cured.

Features

①It is silicone containing reactive functional groups

②Because it is a relatively low molecular weight, it has excellent compatibility with various materials

③By adding an acid generator, it can be cured by light or heat

④ Heat curing by adding acid anhydride, amine catalyst, etc.

⑤KR-470, excellent curability, hardness after curing, strength, etc.

⑥KR-470, almost no shrinkage during curing

General Features

	KR-470	X-40-2678
Number of epoxy functional groups	4	2
Viscosity 25°C mPa.s	3000	2940	3020
cure shrinkage specific gravity method%		+2.1	-1.7	-5.3
Boiling water absorption %		0.46	0.28	0.56
Tg °C		191	150	193
Linear Expansion Coefficient （X10^-5/K)	<Tg	9.7	7.7	6.9
	>Tg	15.4	17.6	16.2

n style="font-family:Arial"><Tg

9.7

7.7

6.9

>Tg

15.4

17.6

16.2