silicone impact modifiers

Introduction

Silicone impact modifiers are specialized core-shell additives—typically featuring a silicone-acrylic rubber core and a methyl methacrylate shell—that dramatically improve the low-temperature toughness, UV weatherability, and thermal stability of plastics. Mainly used in Pc and PC alloys.

MBS, acrylic, silicon impact modifiers compare table

Types	MBS	ACR (Acrylic)	SI (Silicone /Silicone-Acrylic)
Impact efficiency	Excellent	Good	Excellent
Low-temperature impact	Excellent	Good	Best
Weather resistance	Poor-Fair	Excellent	Excellent
UV resistance	Poor	Excellent	Excellent
Transparency	Good	Moderate	Moderate
Heat aging resistance	Good	Excellent	Excellent
Surface gloss	Excellent	Good	Good
Cost	Lowest	Medium	Highest
Flame retardant synergy	Moderate	Good	Excellent
Typical PC dosage	3-10%	3-10%	2-8%

baoxu silicone impact modifier grades

baoxu offer silicon impact modifier with difference silicone content.

baoxu grade	Metablen grade	silicone wt%	features
BX IM 301	S-2001	6	General standard grade
BX IM 330	S-2501		hydrolysis, high temp resistance
BX IM 331	S-2100	10-12	High colorability, Spray-free plastics
BX IM 334	S-2030	30	best low-temperature toughness grade,down to -40℃
BX IM 335	S-2130		halogen free flame retardant PC

Feature

low temperature resistance, weather resistance, high impact resistance, and flame retardant synergy.

Application

It has good impact performance and has weather resistance, acid, and alkali resistance. BX IM 330 is more stable, and the outdoor service life will be longer. Such as high-end mobile phone casings, charger casings, computer casings, outdoor door handles, office equipment, etc. In different product systems, it is recommended to add: 3-6%

Typical Properties

Appearance: white powder
Heat resistance: 305°C (3%)
Hydrolysis resistance: excellent
Low temperature resistance: -30℃–32KJ/M² (5%Add)
Density: 0.97g/cm³

cas 143106-82-5

Packing

25kg per bag.

Handling and storage

BX IM 330 shall be stocked In a ventilated and dry environment, the shelf life is two years. 20 kg/ bag. Conditions of transport for non-hazardous products.