polyisoprene


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polyisoprene

[¦päl·ē′īs·ə‚prēn]
(organic chemistry)
(C5H8)x The basis of natural rubber, balata, gutta-percha, and other rubberlike materials; can also be made synthetically; the stereospecific forms are cis-1,4- and trans-1,4-polyisoprene; the polymer is thermoplastic.
References in periodicals archive ?
After drying at 25[degrees]C in vacuo for 24 h, polyisoprene (3.200 g) was obtained.
Except for the synthesis of high content of cis-1,4- or trans-1,4-polyisoprene to imitate and replace nature rubber, the research on synthesis of polyisoprene with variable microstructure contents keeps attractive in order to obtain some materials of special properties.
Finally, Kent Elastomer found Cariflex polyisoprene products, a synthetic polyisoprene latex from Kraton Performance Polymers (www.kraton.com)--the inventor of styrenic block copolymer (SBC) chemistry.
With almost 10% of the American population afflicted with latex allergies, SKYN's non-latex polyisoprene formula avoids any natural rubber latex allergens that might cause adverse reactions with latex-sensitive users.
After removal of the solvent, the resulting polyisoprene was purified by reprecipitation from toluene with methanol three times (Fuller and Fulton 1990, Tangpakdee et al.
SKYN condoms, made from ultra-soft polyisoprene, are said to be clinically proven to provide greater stimulation than polyurethane and natural rubber latex condoms.
Three unvulcanized rubber materials were used throughout the study; two butyl rubber systems and a polyisoprene rubber.
For example, Ansell Healthcare Ltd.'s SKYN Condoms by Life-Styles offers the first clinically approved polyisoprene condom on the U.S.
While polychloprene and polyisoprene gloves are available, some users find that these alternative choices in gloves don't always match the fine control or greater sensitivity to touch available with latex surgical gloves.
The Solution: Chemist developed a of self-lubricated polyisoprene materials that have been manufactured with a proprietary lubricant system and show a minimal reduction of physical and mechanical properties.
Polyisoprene blocks are inserted between the polystyrene and polybutadiene blocks for improved mechanical and thermal properties.
The company can help customers determine the best rubber, custom compound or special mix, including dense or sponge compounds such as EPDM, natural, nitrile, polyisoprene, SBR, silicone, polychloroprene and more.