Home
Solutions
Heat resistance improving monomer ABS addition example

Heat resistance improving monomer ABS addition example
(IMILEX™-C)

It is possible to improve the heat resistance of ABS while maintaining its transparency!
N-Cyclohexylmaleimide

What is the heat resistance improving monomer (IMILEX™-C)?

IMILEX-C is N-cyclohexylmaleimide, a maleimide that Nippon Shokubai first commercialized in 1985 using its own proprietary manufacturing technology. It is a monomer that can impart heat resistance to various resins and is widely sold both domestically and internationally. The presence of a cyclohexyl ring makes the copolymer colorless, and it has the advantage of being able to maintain the transparency of various copolymers while achieving a high Tg.

Addition of heat resistance improving monomer (IMILEX™-C) to ABS resin

IMILEX-C can be used as a monomer to improve the heat resistance (Tg) of heat-resistant acrylic resins, and improves the heat resistance of transparent ABS resins.

To add it to ABS resin, heat-resistant, transparent ABS resin can be produced by first copolymerizing IMILEX-C with acrylic monomer to produce a heat-resistant acrylic resin, and then melt-kneading this with transparent ABS resin.

STEP 1

IMILEX-C

＋

acrylic monomer

→
*Copolymerization

Heat-resistant acrylic resin

STEP2

transparent ABS resin

＋

Heat-resistant acrylic resin

→
* Melt kneading

Heat-resistant transparent ABS resin

If heat-resistant acrylic resin obtained by copolymerization with IMILEX-C is produced in advance, transparent heat-resistant ABS can be manufactured simply by melt-kneading, a simple manufacturing process.In addition, by adjusting the ratio of transparent ABS resin to heat-resistant acrylic resin, the heat resistance (heat deflection temperature, etc.) of the transparent heat-resistant ABS can be easily adjusted.

Features of the heat resistance improving monomer (IMILEX™-C)

1. Efficiently improves the heat resistance of polymers

By melt-blending (alloying) transparent ABS resin with an acrylic styrene resin copolymerized with IMILEX-C, it is possible to improve heat resistance (Tg) by 9°C while maintaining almost the same total light transmittance (97% or more). In Blend Example 1, the Tg is 116°C, but by increasing the amount of IMILEX-C copolymer, further improvements in heat resistance can be expected.

		Transparent ABS only	Formulation example 1	Formulation example 2
resin composition combination (wt%)	transparent ABS	100	60	60
	IMILEX-C copolymer	0	32	0
	AS resin	0	8	40
Physical properties	Tg (°C)	107	116	106
	Total light transmittance (%)	87	84	55
	Bigat softening point (℃)	–	114	103

2. Able to maintain the inherent transparency of polymers

The heat resistance improving monomer (IMILEX-C) is a white flake-like material that can maintain the transparency characteristic of various polymers even when added during polymerization.