PERGAQUICK A3 S

The curing of unsaturated polyester resins at ambient temperatures can in general not be performed by an organic peroxide alone. The radical formation which is necessary - to start the polymerisation reaction - is too slow at ambient temperatures with most generally applied organic peroxides. To speed up the radical formation in a controllable way, organic peroxides must therefore be used in combination with a so called accelerator. For diacyl peroxides like Dibenzoyl peroxide - the PEROXAN BP-types - aromatic tertiary amines have to be used as accelerator. The following amines are available: N,N-Dimethyl-p-toluidine PERGAQUICK A100 (high reactivity) Ethoxylates of p-toluidine PERGAQUICK A150 PM (high/medium reactivity) N,N-Dimethylaniline PERGAQUICK A200 (medium reactivity) N,N-Diethylaniline PERGAQUICK A300 (low reactivity) From each type the following formulations are available - technically pure - 10% formulation in plasticizer Each amine type has a different and specific influence on the decomposition of Dibenzoyl peroxide. Therefore, it is possible to adjust a wide variety of gel times and speed of cure by the proper choice of amine type and dosage level. The cure system Dibenzoyl peroxide / amine accelerator can be characterized as being: - not sensitive for moisture - practically not sensitive to pigments and fillers - applicable at low temperatures Possible disadvantages can be: - a limited pot life of the amine accelerator in the resin - yellow to brown color of the cured product - poor UV light stability of the cured product - a relatively high residual styrene content in the moldings after a postcure at elevated temperature especially at high amine accelerator dosages. A special application of the amine accelerator is their use as promotor in a ketone peroxide / cobalt accelerator cure system. For this application mainly PERGAQUICK C24 AX is used. Depending on application area and working conditions, the following accelerator dosage levels are recommended: PERGAQUICK A3 S: 0,5 to 2,0 phr

• Maximum storage temperature (Ts max) : 15°C
• Minimum storage temperature (Ts min) : 0°C
• Storage stability as from date of delivery : 6 months
• Might react violently with organic peroxides. It is therefore not allowed to store or transport the product together with peroxides. NEVER BRING AN ACCELERATOR INTO DIRECT CONTACT WITH PEROXIDES!
• Please refer to the material safety data sheet (MSDS) for information concerning safe storage, use and handling of PERGAQUICK A3 S.