What is Isobutyl Acrylate IBA CAS 106-63-8?

Isobutyl Acrylate, commonly called IBA, is a branched acrylic ester monomer with molecular formula C7H12O2. It is a reactive building block for specialty acrylic copolymers, not a finished resin, coating or adhesive.

Is Isobutyl Acrylate the same as n-Butyl Acrylate?

No. They have the same molecular formula but different ester structures. Poly(isobutyl acrylate) has a Tg around -24 deg C, about 25 deg C higher than poly(n-butyl acrylate) at around -49 deg C, so IBA generally gives harder and more solvent-resistant polymer films.

Why is the butyl acrylate isomer identity important for IBA?

n-butyl, isobutyl, sec-butyl and tert-butyl acrylate differ in side-chain branching, which changes homopolymer Tg, reactivity and final coating or adhesive properties. Releasing the wrong isomer can produce a softer or chemically less resistant polymer, so the IBA identity should be confirmed before production.

What are the main applications of Isobutyl Acrylate?

IBA is used in specialty acrylic copolymers for coating and binder resins, adhesive polymer systems, and emulsion or solution-polymer dispersions. It is especially suited to acrylic coil-coating polymers that need hardness, solvent resistance, wetting and gloss in one monomer.

Why is MEHQ inhibitor control required for Isobutyl Acrylate?

IBA is an acrylic monomer that can polymerise during storage, so MEHQ inhibitor is added. Commercial grades commonly use about 10-20 ppm MEHQ, or a supplier range such as 15 +/- 5 ppm, and the actual inhibitor type and level must fit the planned polymerisation process.

Isobutyl Acrylate (IBA) CAS 106-63-8

Isobutyl Acrylate, commonly called IBA, CAS 106-63-8, is a stabilised acrylic ester monomer supplied for specialty acrylic copolymer manufacture. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 106-63-8
Synonyms: Iso-Butyl Acrylate; 2-Propenoic Acid 2-Methylpropyl Ester; Acrylic Acid Isobutyl Ester; IBA
Einecs: 203-417-8
Molecular Formula: C7H12O2
Grade: Industrial Monomer Grade
Package: 180 kg steel drums; 900 kg IBCs / ISO tank

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Product Description

Isobutyl Acrylate (IBA) CAS 106-63-8 is iso-butyl acrylate, with EC 203-417-8 and molecular formula C7H12O2.

Synonyms: Iso-Butyl Acrylate; 2-Propenoic Acid 2-Methylpropyl Ester; Acrylic Acid Isobutyl Ester; IBA.

CAS: 106-63-8.

Molecular formula: C7H12O2.

It is supplied as a clear, colourless liquid.

It is positioned as a stabilised acrylic ester monomer for specialty acrylic copolymer manufacture.

It is used where isobutyl acrylate is specifically required and is distinct from n-Butyl Acrylate.

It is used in specialty acrylic copolymers for coating and binder resins.

It is used in adhesive polymer systems with IBA as a named comonomer.

It is used in emulsion and solution-polymer dispersions for industrial formulations.

It is especially suited to acrylic coil-coating polymers needing hardness, solvent resistance, wetting and gloss in one monomer.

It has the same molecular formula as n-butyl acrylate but a different ester structure, with a poly(IBA) Tg around -24 C versus about -49 C for poly(n-butyl acrylate).

Isomer identity is important because n-, iso-, sec- and tert-butyl acrylate differ in side-chain branching, changing homopolymer Tg, reactivity and final properties.

MEHQ inhibitor is added, commonly about 10-20 ppm or a supplier range such as 15 +/- 5 ppm, matched to the planned polymerisation process.

Confirm isomer identity as isobutyl acrylate, purity, water, acidity, colour and inhibitor level.

Typical bulk data include density about 0.89 g/cm3, boiling point about 132 C, flash point about 30-32 C and melting point about -60 C.

Store in tightly closed containers in a cool, dry, well-ventilated area, use suitable PPE when handling, and follow the current SDS.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Isobutyl Acrylate IBA CAS 106-63-8?

A: Isobutyl Acrylate, commonly called IBA, is a branched acrylic ester monomer with molecular formula C7H12O2. It is a reactive building block for specialty acrylic copolymers, not a finished resin, coating or adhesive.
Q:
Is Isobutyl Acrylate the same as n-Butyl Acrylate?

A: No. They have the same molecular formula but different ester structures. Poly(isobutyl acrylate) has a Tg around -24 deg C, about 25 deg C higher than poly(n-butyl acrylate) at around -49 deg C, so IBA generally gives harder and more solvent-resistant polymer films.
Q:
Why is the butyl acrylate isomer identity important for IBA?

A: n-butyl, isobutyl, sec-butyl and tert-butyl acrylate differ in side-chain branching, which changes homopolymer Tg, reactivity and final coating or adhesive properties. Releasing the wrong isomer can produce a softer or chemically less resistant polymer, so the IBA identity should be confirmed before production.
Q:
What are the main applications of Isobutyl Acrylate?

A: IBA is used in specialty acrylic copolymers for coating and binder resins, adhesive polymer systems, and emulsion or solution-polymer dispersions. It is especially suited to acrylic coil-coating polymers that need hardness, solvent resistance, wetting and gloss in one monomer.
Q:
Why is MEHQ inhibitor control required for Isobutyl Acrylate?

A: IBA is an acrylic monomer that can polymerise during storage, so MEHQ inhibitor is added. Commercial grades commonly use about 10-20 ppm MEHQ, or a supplier range such as 15 +/- 5 ppm, and the actual inhibitor type and level must fit the planned polymerisation process.
Q:
Which Isobutyl Acrylate data should be checked before use?

A: Confirm the isomer identity as isobutyl acrylate, then check purity, water, acidity, colour and inhibitor level. Typical bulk data include density about 0.89 g/cm3, boiling point about 132 deg C, flash point about 30-32 deg C and melting point about -60 deg C.

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