To solve this problem, Yokohama Rubber mixed an acid acceptor
into the polyamide resin to enable it to capture and hold the acid runoff.
Haistab 1214 is a nontoxic acid acceptor
for rigid PVC that reportedly improves the performance of organotin heat stabilizers in extruded products, such as vinyl siding or profile.
Users gain the flexibility of producing a wide range of end-use tailored compounds from either reactor flake or granule or from a basic compounded pellet containing only antioxidant and acid acceptor
The optimization of the acid acceptor
system, particularly the amount of magnesium oxide used (refs.
HSA 10 is a micronized, high activity MgO for use as a scorch retarder in chloroprene and fluoroelastomers, as a thickening agent for SMC/BMC, and as an acid acceptor
in halogenated and chloroprene adhesives.
If the next higher UL rating, 105 [degrees] C, is desired, this is also readily accomplished (table 4) by using a less volatile plasticizer, a more efficient acid acceptor
, and an antioxidant which will not interfere with a peroxide cure.
Additional process factors that increase costs are rheological variability due to hygroscopic acid acceptors
, mold sticking and difficulty dispersing an additional compound ingredient, calcium hydroxide.
A commercially available fluoroelastomer material with a fluorine content of 66% was compounded with acid acceptors
improve compression set and stabilize the material without post curing.
The fluoroelastomer fomulation consisted of fluoroelastomer, carbon black, acid acceptors
and a wax.
This would then affect the activity of the acid acceptors
, which would change the cure rate.
Fluoroelastomer cure systems typically contain amines as the primary crosslinking agent and metal oxides as acid acceptors