As a kind of high-performance unsaturated resin, vinyl resin thickening properties of manufacturers has always been the research direction, this is because the unique application characteristics of BMC/SMC recognised by the majority of customers, especially with the BMC/SMC application in automobile parts,

1. Thickening properties of vinyl resin
As a kind of high-performance unsaturated resin, vinyl resin thickening
properties of manufacturers has always been the research direction, this is because the
unique application characteristics of BMC/SMC recognised by the majority of
customers, especially with the BMC/SMC application in automobile parts, thickening
type vinyl resin with better impregnation properties and rheological properties at the
same time, thus allowing resin at low pressure down moulded products, the more
common unsaturated resin vinyl resin can withstand the impact of the higher。
And it has good creep resistance and fatigue resistance. These components
include wheel, seat, heat dissipation frame, gate board, engine valve sleeve, etc.
Thickening type vinyl resin, of course, can be widely used in electric insulation, the
production of industrial pump valve, golf first class
As a kind of thickening with vinyl resin, should have unique characteristics.
These features include: reinforced material and packing of invasive good; The initial
low viscosity and fast thickening properties; Good mechanical properties, including
toughness and resistance to fatigue characteristics, etc.;
A longer storage period; Low curing exothermic peak and low styrene
volatilization, etc. To use effect, in the synthesis of vinyl resin the more common
method is: the original introduction of acidic functional groups on vinyl ester
molecule (carboxylic acids) and reusing the carboxyl and alkaline earth metal oxides,
such as magnesium oxide, calcium oxide, etc.), but this method thickening time is
long, need a few days commonly, is sensitive to moisture content. Now, there is
another method, which USES isocyanate and polyol reaction to produce mesh
structure, so as to achieve rapid thickening of the resin.
This method is suitable for low pressure molding, stable viscosity control, low
requirements for temperature and humidity, stored for a long period, at the same time
products combined with the characteristics of high strength between the layers, at the
same time also can use low acid value resin with excessive alcohol as thickening

2. agent. The principle of this method is in the molding of vinyl ester resin composite
material, period and the physical properties of the static tree was slightly better than
polyester purport;
But its dynamic performance is significantly better than that of common
unsaturated polyester resin material, it has to do with some of the SMC/BMC has
practical reference manufacturers, some manufacturers have vinyl resin in the system
before the SMC material, found that the performance difference is not particularly
obvious, but the cost is increased, it is proposed that the vinyl resin SMC does not
have any applications, etc.; With vinyl ester resin system of the high strength sheet
molding compound (SMC) has been widely used in automobile industry.
Industry recently thickening characteristics of vinyl resin, including the influence
of different thickener and thickener for thickening were studied, the influence of
further improve and improve the performance of the thickening vinyl.
Thickening with vinyl due to relative to the general based on vinyl resin
unsaturated resin better features, also gives some widely used, at present in the
automotive industry, electrical insulation, and sports equipment, industrial
construction, corrosion resistance, and other fields have a wide range of applications.
Experts said, the use of good weatherability of vinyl resin, can be applied to some
outdoor applications, especially now, such as the northwest or some indicator on the
plateau railway parts, it will be more can prolong the service cycle of SMC/BMC,
also can make whole vinyl moulded valve, etc.