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Composite Material

Composites are made by combining two or more distinct materials instead of simple mixing. They integrate merits and make up deficiencies, acquiring unique properties like light weight, high hardness and high temperature resistance superior to single materials.

Vinyl Acetate/Crotonic Acid Copolymer

The carboxylated VINNAPAS® C series, when paired with magnesium oxide or calcium oxide, provides a perfect thickening system for unsaturated resin composites. Used in combination with thickeners, the carboxylated VINNAPAS® C series allows for stable, high viscosity levels. After maturation, this combination is ideal for preventing thermoplastic resin exudation.

This product line includes 4 core models
Specification
LL8251
C305
C341
C501
Viscosity
2.0-2.3 mPas
2.5-3.5 mPas
3.5-3.8 mPas
7.5-9.5 mPas
Acid Value
6.0-9.0 mg KOH/g
30.0-38.0 mg KOH/g
6.0-8.0 mg KOH/g
6.0-9.0 mg KOH/g
Molecular Weight
30000
50000
60000
135000
K Value
25
30
34.5
50
Softening Point
101℃
120℃
118℃
146℃
Glass Transition Temperature
38℃
45℃
40℃
43℃
Technical Documents
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Related News

2026-05-21

Application of VINNAPAS Resin in Composite Materials

VINNAPAS resins are used in fiber-reinforced plastic composites as low-profile additives, which can reduce the shrinkage rate to below 0.05% and achieve Class A surface finish. Series C can be thickened with oxides, while Series B and UW are suitable for mild thickening conditions. These resins are easily soluble in styrene and can be prepared into solutions for SMC, BMC and other processes.

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