Abstract: In one embodiment, this invention relates to a solventless liquid isoprene compound. The compound includes a liquid isoprene rubber. The compound also includes a curing agent selected from sulfur and/or sulfur donors. The curing agent is present in an amount of at least about 3% by weight of the compound. The compound contains substantially no solvent. In another embodiment, this invention relates to a solventless liquid isoprene compound. The compound includes a liquid isoprene rubber. The compound also includes a nonsulfur curing agent. The curing agent is present in an amount of at least about 5% by weight of the compound. The compound contains substantially no solvent.

Abstract: An elastomer blend is made by admixing fluoroelastomer and fluorinated silicone polymer (with optional filler and/or conductive particulate) into a polymeric admixture in weight ratios to provide a low vaporous hydrocarbon permeation rate and high thermal strain value in thermally robust elastomer cured from the blend. The blend is of especial use for making gaskets for use in high stress conditions at elevated operating temperatures.

Abstract: A method for making cured polymeric articles such as gaskets or seals in situ (within a forming mold) from a feed stream compounded polymer admixture of (a) a first batch admixture of base polymer and a first curing component of a plural component curing combination, (b) a second batch admixture of the base polymer and a second curing component, and (c) a third batch admixture of a carrier and a plurality of performance additives. The third batch admixture is provided from a vessel having a relatively small volume (when compared to the volume of the vessels holding the first and second batch admixtures); this small volume enables precise formulations of additives and rapid changeover of additive formulations for the base polymer.

Abstract: Sealing members are made by a process of curing a solventless liquid EPDM compound. The compound contains a liquid EPDM rubber in an amount of at least 50% by weight of the compound. The compound further contains at least 3% by weight of a sulfur curing agent or at least about 5% by weight of a non-sulfur curing agent. Examples of sealing members include cure in place gaskets (CIPG), inject in place gaskets (IJPG), and form in place gaskets (FIPG).

Abstract: The elastomeric static gasket is disclosed where a thin carrier is used to support a stopper member and an elastomeric seal member on the same surface of the carrier. An elastomeric seal is molded adjacent to the stopper. The stopper member acts as a compression limiter to limit the compressive forces on the seal. Preferably the stopper is an elastomer. Alternatively, the seal can be made with a different material than the stopper member. A variety of carrier members may be used in practicing the invention.