Page 51 - 《橡塑技术与装备》英文版2026年1月

SPECIAL AND COMPREHENSIVE REVIEW

Hu Chunyan et al. synthesized a siloxane- for various surface protective treatments of hydraulic
modified polyurea elastomer (SPUR) with both structures.
rigid and flexible synergistic mechanical properties Zhang Yuying developed a kind of ultra-high
and repairability, using amino-terminated solid content modified aliphatic aspartic polyurea
polydimethylsiloxane, amino-terminated polyether topcoat for wind turbine blade protection, using
(polyetheramine, PEA), isophorone diisocyanate fluorosilicon-modified aliphatic aspartic polyurea
(IPDI), and n-butylaminomethyltriethoxysilane resin as the main resin and aliphatic isocyanate as the
(S151) as raw materials. Through the "prepolymer curing agent. The hydrophobicity, abrasion resistance,
capping method" and "soft and hard segment rain erosion resistance, and weather resistance of the
regulation method", and in combination with PEA20 topcoat were investigated. The results showed that
and PEA9 monomers, they achieved a synergistic the solid content of the modified aliphatic aspartic
effect. The tensile test and repair performance test polyurea topcoat reached 95%, with a film gloss of
of SPUR were conducted: SPUR4 exhibited a tensile ≤30; the mechanical properties, rain erosion resistance,
strength of 5.26 MPa, an elongation at break of and UV aging resistance of the paint film were
530%, and a repair rate of 30%, combining optimal excellent, and the hydrophobicity was good.
comprehensive strength and elasticity. E poxy soybe a n oi l (E SO) i s a bu nd a nt ,
1.4.3 Other modifications renewable, environmentally friendly , and
Polyurea modification also includes methods inexpensive, with good thermal stability and solvent
such as fluorine modification, epoxy soybean oil resistance. After ring-opening with primary amines,
(ESO) modification, and castor oil modification. The ESO can be used to synthesize mild network cross-
strong electronegativity of fluorine atoms enables the linking, improving the mechanical properties of
high bond energy carbon-fluorine bond to protect the polyurea.
main chain macromolecules, imparting the material He Jinwen et al. obtained Michael addition
with excellent surface and electrical properties. products by reacting IPDA with diethyl maleate and
Moreover, organic fluorine can also exhibit excellent then added ESO to catalyze the synthesis of modified
hydrophobic effects. polyaspartic ester (PAE). The research results showed
Feng Mingwei and others synthesized fluorine- that ESO-modified PAE formed a cross-linked network
modified polyurea materials by using fluorine- structure. The reaction temperature was controlled at
modified alicyclic slow-reacting secondary amine 95~105 ℃, with ZnCl2 as the catalyst, and the molar
r e si n a s t h e A c o m p o n e n t o f a n o v e l p o l y u r e a ratio of epoxy groups to amino groups was 1:1.25.
system, and the B component as a prepolymer made The optimal addition amount of ESO was controlled at
from the reaction of polyester polyol and aliphatic 6%~13%. The addition of ESO improved the thermal
polyisocyanate. Due to the introduction of fluorine, stability of PAE.
which possesses various characteristics such as Wang Xiaotao et al. added a certain amount
high electronegativity, high F-C bond energy, of modified castor oil to the polyurea component
and low surface energy, combined with special and obtained castor oil modified spray polyurea
formulation design, the material exhibits excellent elastomer through spraying. They s tudied the
aging resistance, waterproofing, low-temperature influence of castor oil content on the contact angle,
flexibility, impact and abrasion resistance, strong mechanical properties, water absorption rate, and
adhesion, and other advantages. It can be cured at tensile strength retention of the spray polyurea
low temperatures and is less affected by external elastomer. The results showed that castor oil could
temperature and humidity, making it highly suitable improve the water resistance of the spray polyurea

Vol.52，2026 ·5·