| 摘要 |
<p>A low-sling, high tack fiber lubricant having a final viscosity of from 50 SUS to 200 SUS characterized in that the lubricant contains: a mineral oil-vehicle; a high molecular weight oil-soluble polymer having a number average molecular weight in the range of from 3,500,000 to 7,500,000 selected from: (i) polyisobutylene homopolymer; (ii) a polymer of straight chain alpha-monoolefins/having 4 to 20 carbon atoms; and (iii) a copolymer of isabutylene and straight chain alpha-monoolefin; a low molecular weight oil-soluble polyisobutylene homopolymer having a number average molecular weight in the range of from 500,000 to 3,000,000 and an emulsifier or mixture of emulsifiers wherein the ratio by weight of component (b) to component (c) is from 9:1 to 1:9, wherein said lubricant is prepared by a process comprising selecting a mineral oil vehicle having a viscosity from about 5 to 50 SUS lower than the final viscosity of the lubricant; admixing components (b), (c) and (d) into the mineral oil vehicle to provide an admixture having viscosity of from 5 to 30 SUS above the final viscosity of the lubricant, and applying controlled low shear force to the admixture containing the polyisobutylene additive to reduce viscosity of the admixture to the final viscosity of the lubricant.</p> |
