| 摘要 |
<p>A sound deadener sheet softenable by heat to wilt into comformity and adhesive engagement with a contoured metal surface but resistant to running and flow at higher temperatures. The sheet is formed of a mixture of mineral filler and a binder. The binder comprises about 45% to about 70% by weight of asphaltic bitumen from the class consisting of natural asphalt and residue from the distillation of pertroleum, from about 5% to about 20% by weight of an elastomeric modifier compatible with the asphaltic bitumen and from about 1.5% to about 3.5% of the solid, non-thermoplastic product of reaction of vegetable unsaturated oil with sulfur, sulfur monochloride or sulfur dichloride coacting with the asphaltic bitumen to prevent running and flow of the sheet at higher temperatures. The weight percentages are based on the weight of the binder.</p> |
