What is 2-Methyl-1,3-Propanediol (MP DIOL) and their application?
Our 2-Methyl-1,3-Propanediol is produce via hydroformylation of Allyl Alcohol (AAL) with carbon monoxide and hydrogen. It’s a colorless low viscosity liquid with low toxicity and non-linear diol with a unique molecular structure. A branched aliphatic diol with two primary hydroxyls. This structure inhibits the crystallization of MP Glycol allowing it to remain liquid even in cold temperatures.
Our MPO can replace Ethylene Glycol, 1,3-Propanediol, 1,4-Butanediol, 1,6-Hexanediol, Diethylene Glycol (DEG), Neopentyl Glycol (NPG), Propylene Glycol (PG), 1,3-butanediol, Trimethylpentanediol, Mono Propylene Glycol (MPG)
Synonyms:
- METHYL PROPANEDIOL
- 2-METHYLPROPANE-1,3-DIOL
- 2-METHYL-1,3-PROPANEDIOL
- MP DIOL
- MPO
- MPD
- MP DIOL GLYCOL
- MPOH
- 1.3-DIHYDROXY-2-METHYLPROPANE
- 2-METHYL-3-PROPANEDIOL
- 3-PROPANEDIOL
- 3-METHYL-1.3-PROPANEDIOL
- 1.3-PROPANEDIOL,2-METHYL-
Unsaturated Polyester Resins (Composites).
The unique molecular structure of MPO brings
significant process and property advantages to Unsaturated polyester resins. The all-primary
hydroxyl and high boiling point character of MPO increase both esterification rates and kettle
productivity. This higher reactivity compared with other glycols, such as propylene glycol, leads to
lighter color resins. Also, the non-linear backbone of MPO provides polyester with excellent styrene
miscibility. MPO provides an excellent balance of tensile strength, elongation and flexibility to the
final product. Molding resins can achieve higher elongations and “toughness” without sacrificing
modulus. Moreover, unlike other flexibilizing glycols, MPO will not lead to losses in chemical
resistance, water resistance or weatherability. Isocyanate modified unsaturated polyester resin
molding system benefit from incorporating MPO into the polyester. The two primary hydroxy of
MPO ensure reliable, rapid Isocyanate chain extension in these hybrid resin system.
Unsaturated Polyester Resins (Gel Coats).
With their exacting performance requirements, gel coats gain key benefits from the inherent
properties of MPO. Gel coats formulated with MPO-based polyesters have high strength and
elongation characteristics, excellent blister resistance and excellent weatherability. Comprehensive
testing has demonstrated that MPO enhances the toughness of gel coats without sacrificing extended
weatherability performance. MPO-based polyester used in these applications are suitable for use in
marine and fiberglass panel resins.
Saturated Polyester for Coating.
MPO unique capability to flexibilize high aromatic content-Phthalic, Isophthalic, or
Terephthalic-based polyesters enables O-T flexibility coupled with H-2H pencil hardness. This
coupling of hardness and flexibility is only possible because the MPO-based polyesters have a very
low tendence to form crystalline, insoluble polyesters- even when high aromatic content is utilized.
Extensive testing of MPO base polyesters also has demonstrated that MPO can be utilized to make
highly weatherable polyester binders that can compete effectively with top-of-the-line exterior
durable polyesters.
Polyurethane.
MPO is a building block that can be broadly utilized in the diverse field of polyurethane coating,
adhesives, sealants and elastomers. Application systems include: 2K industrial maintenance coatings,
aqueous polyurethane dispersions, liquid prepolymers for urethane elastomers and urethane
adhesives. As a liquid diol, MPO can be used as a chain extender to build molecular weight and
performance in urethane elastomers, adhesives and sealants. The branched structure of MPO leads
itself especially well to the manufacturing of clear, pliable sealants and adhesives. In addition, MPO
has excellent compatibility with conventional polyols and dependable reactivity with the Isocyanate
component. MPO is an ideal intermediate for polyester polyols because it yields all primary
hydroxyl-containing polyesters. Its unique structure makes it possible to produce liquid polyesters
that are readily dissolved in conventional coatings solvents. MPO based polyester polyols also
demonstrate excellent compatibility in urethane adhesive formulations.
Plasticizers.
The unique non-crystallizing nature of MPO-based diesters and polyesters can be a significant
handling advantage for the thermoplastics (PVC) compounder. The very low glass transition
temperatures of MPO-based ester and polyester derivatives ensure efficient utilization of these
premium polyesters. End uses for MPO-based plasticizers include: PVC Laminating Films
Refrigerator Gaskets Vinyl Electrical Insulation (wire, cable, tape, etc.)
MPO Alkoxylate.
MPO reacts with ethylene oxide or propylene oxide to from MPO alkoxylate. The main
applications are the manufacture of UV curing agent monomer, polyester polyol, painting, ink,
adhesive and polyurethane.
MPO Diacrylate/ Dimethacrylate and MPO Alkoxylate Diacrylate/
Dimethacrylate.
MPO or MPO alkoxylate reacts with acrylic acid/ methacrylic acid to from MPO diacrylate/
dimethacrylate or alkoxylate diacrylate/ dimethacrylate. Both glycol diacrylate can be used in quite
broad applications as starting materials and intermediates for thermosetting paints, adhesives,
nonwoven fabric binders, photosensitive agents, paper finishing agents, copolymer modifiers and
cross-linking agents. But MPO alkoxylate diacrylate/ dimethacrylate has lower skin irritation and
odor than MPO diacrylate/ dimethacrylate.
MPO Polycarbonate.
MPO reacts with DMC or DEC to form MPO polycarbonate. Recause MPO is a branched
aliphatic diol with two primary hydroxyls that inhibits the crystallization of MPO polycarbonate
allowing it to remain liquid even in cold temperature. The main applications are the adhesives
softsegment intermediates for polyurethanes, coating and ink.
Modified Polyethylene Terephthalate (PET)
MPO provides an effective crystallization modifier for PET. The branched structure of MPO helps
control both thermal and crystallization properties of the final polyester products. This control offers
differential performance features in polyester bottle and fiber resin applications. PET is essentially a
highly crystalline resin and, therefor, appear opaque. It is known to use a small quantity of
isophthalic acid together with terephthalic acid as the dicarboxylic acid component of PET or to use
MPO together with ethylene glycol as the glycol component of PET can obtain transparent bottle.
But isophthalic acid is very expensive, MPO modified PET can reduce PET bottle cost. MPO has a
side chain of a methyl group which renders the polyester an asymmetric chemical structure, if this
compound is used as PET Fiber, the result PET fiber will be made in irregular form, and dyestuff
molecules will attach to it readily. Therefore, the resulting PET fiber are endowed with excellent
dyeability, lesser elongation and greater strength.
Personal Care
MPO also can be used in an amollient, emulsifier and humectant. The hydrophilic/ lipophilic
balance of MPO provides solvency to both polar and non-polar active components. This feature
ensures shelf-stable formulations and clear, homogenous solution.
Polyester resins
Polyester Polyol