2005 年，马库斯公司 (Marcus oil and Chemical) 获得了一个编号为 U.S.P6890982 的专利，它是在热熔胶中用植物蜡取代石油和其它石蜡。氢化植物油蜡要么是从大豆油、要么是从棕榈油中派生出来的，但是也不排除其他很多可以经济地提炼的植物油。这些蜡的熔点是 50-70 °C（120-165 °F）。热熔胶含有比例为 25-35% 的共聚物树脂（EVA）， 15-40% 的粘性树脂，还有氢化植物油派生出来的比例为 15-35% 的蜡。这种蜡有两个特点：在 98.89 °C时的熔融粘度是 50-70 赛波特通用粘度秒（SUS） , 其梅特勒滴点（Mettler 滴点）为 54.4-76.7 °C。
这种胶有两个特性： DSC 熔点是 50-80 °C和在 176.67 °C时的熔融粘度是 1000-5000cps 。这种胶能把纤维的和有纤维质的材料粘接到某种产品上，可以是纤维的和有纤维质的产品、木材、金属、玻璃和塑料产品。
In 2003, Marcus Oil and Chemical, Houston, TX and the Polyofefins and Elastomer Business Group of Dow Chemical, Middle, MI, announced an agreement by which Dow would manufacture and supply polyethylene waxes to Marcus Oil made using its INSITE technology. INSTE is Dow.s proprietary single cite catalyst technology which is increasingly being used to produce linear low density polyethylene(LLDPE) plastics and some polypropylene. The waxes were to be made at Dow's Sarnia, ONT development plant. The wax facility would initially have capacity to produce 27,000 tous per year of polyethylene wax.
Single site catalyst technology was introduced a decade ago as a major development and advancement in the polymerization of ethylene to make polyethylene resins. The use of single site catalysts in polymerization reactions provides for greater control over the reaction and the resultant polymer that is produced. As a result, more uniform and consistent are obtained, and in general properties of the polymer can be altered as desired.
Marcus has now begun offering a range of polyethylene waxes made using the metallocene catalysts. |
