53201-62-0

Usage

Chemical compound

Yes

Usage

UV stabilizer and crosslinking agent in polymers, plastics, and coatings

Physical appearance

White, odorless powder

Solubility

Insoluble in water

Molar mass

454.5 g/mol

Property enhancement

Improves physical and mechanical properties of polymers

Protection

Effective against degradation caused by UV radiation

Applications

Food packaging, adhesives, automotive components, and other consumer goods

Upstream product

• 99-96-7 4-hydroxy-benzoic acid 
• 2345-34-8 4-acetyloxy-benzoic acid 
• 27914-73-4 4-acetoxybenzoyl chloride 
• 79066-38-9 1,4-bis(4-acetoxybenzoyloxy)-benzene 
• 123-31-9 hydroquinone 

Downstream Products

• 292865-90-8 Hydroquinone bis[4-(3-Acryloyloxypropoxy)benzoate] 

Relevant academic research and scientific papers

Novel cholesteric liquid crystalline elastomers containing dimer type nematic and chiral liquid crystalline side-chains

A new set of cholesteric side chain liquid crystalline elastomers (ChLCEs) E1-E7 were graft copolymerized by hydrosilylation reaction with poly(methylhydrogeno)siloxane, nematic monomer (M1), chiral monomer (M2), and crosslinking agent (CL). The two monomers were both dimers, and the chiral 2-octyl terminal group was firstly used in the ChLCE systems. The chemical structures of M1, M2 and CL were carefully examined by Fourier transform infrared (FT-IR), elemental analysis (EA), proton nuclear magnetic resonance spectroscopy (1H NMR); and their mesomorphic phases were determined by observation using polarizing optical microscopy (POM), and double confirmed by calculations from the results of X-ray diffraction (XRD). The helical structure of combining the chiral and achiral liquid crystalline side chains endowed the obtained ChLCEs with cholesteric liquid crystalline properties. By tailoring the dosage of the crosslinking agent, the mesomorphic properties of ChLCEs could be adjusted. The mesophase-isotropic phase ranges of the ChLCEs were gradually narrowed with the increasing addition of CL according to differential scanning calorimetry (DSC). Thermal analysis (TG) results showed the temperatures at which 5% weight loss occurred were greater than 300 °C for all the ChLCEs. The effective crosslink density (Mc) of the ChLCEs was characterized by swelling experiments showing that the molecular weight between the crosslinking points decreases with the increase of the CL. Fourier transform infrared imaging (FT-IR imaging) and FT-IR indicate the functional groups of all the ChLCEs are finely distributed.

Dielectric materials

The present invention relates to a novel class of polymers which can be used as dielectric material for the preparation of passivation layers in electronic devices. The polymers are prepared from polymerizable compounds having mesogenic groups and they pr

Thermosetting compounds

Provided is a thermosetting compound that has satisfactory solvent solubility and can be rapidly cured by a heat treatment to form a cured product having extreme heat resistance. The thermosetting compound according to the present invention is represented

Synthesis and characterization of Triad based rigid mesogenic diols derived from Hydroquinone and 4-hydroxybenzoic acid

Triad based rigid mesogenic diols have been synthesized by four step synthesis method using protection-deprotecti method. Hydroquinone and 4-hydroxy benzoic acid have been used as starting materials. Synthesized diols have be characterized by IR, 1H and 13C NMR, and mass spectroscopic methods. Thermal properties have been determined b thermo gravimetric analysis method and degree of crystallinity have been measured by wide angle X-ray techniqu Substituted hydroquinones (methyl and chloro) have been used to study the effect of substitution on physical and therm properties. Synthesis of rigid mesogenic diol monomer using p-hydroxy benzoic acid and hydroquinone is reported, which a facile route. Hydrolysis of diacetate derivatives of rigid mesogenic diols is performed in good yields, even though tw types of ester groups present in the same moiety, aromatic and aliphatic. The experimental results reveal that hydroquino based rigid triad mesogenic diol have high thermal stability and degree of crystallinity as compared to methyl- and chlor substituted rigid triad mesogenic diols.

Bismaleimides comprising mesogenic groups

The invention relates to bismaleimides comprising mesogenic groups which consist, corresponding to (I), of two reactive terminal maleimide groups which are linked via linear or singly alkyl-substituted alkylene chains A, which are linked to an aromatic mesogen M via ester, amide or ether groups, wherein A, X, M and R are as defined in the specification. The invention, moreover, relates to oligomeric liquid crystalline bismaleimides of general formula (II) wherein A, X, M and R are as defined above, n represents and integer from 1 to 100 and B represents piperazinyl or a divalent radical which is derived from a primary or secondary para-substituted cyclic diamine, wherein B is bonded via the amino groups of the diamine. The invention also relates to methods of producing said bismaleimides.