<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">polybutadiene elastomer</topic></authority><related type="broader"><topic>elastomer by composition or origin</topic></related><variant type="other"><topic>elastomer, polybutadiene</topic></variant> <note xml:lang="en"><![CDATA[ A class of elastomers  that is notable for performance at low temperatures, resilience, and abrasion resistance. Used for shoe heels and soles, gaskets, and belting. Combined with other rubbers to improve their resilience and flexibility at low temperatures. ]]></note></mads>