公开(公告)号：DE2551352A1

公开(公告)日：1977-05-26

申请号：DE2551352

申请日：1975-11-15

Applicant: BASF AG

Inventor： ZETTLER HANS DIETER ,  ENGLER PETER DIPL ING DR ,  GRUHN HEINZ ING GRAD ,  IMMEL WOLFGANG DIPL ING DR ,  SCHMITT WERNER

IPC: B29C48/395 ,  B29B1/10

Abstract: Continuous prodn. of homogeneous mixts. of (A) a low viscosity component of 1-1000 Ns/m2 viscosity and (B) a high viscosity component with viscosity 102-104 Ns/m2 higher than (A), with (A) being 70-99 wt. % of the total by passing (B) through a screw extruder with L/D ratio 30-60 (40-50) and adding (A) in up to 4 separate stages, in amounts of 30-60, 80-130, 400-550 and 800-1200 wt. % w.r.t. initial amount of (B) at each stage. Used for prepn. of sealants, adhesives, rubber solns. multi-grade lubricating oils, etc. in which (B) is a polymer e.g. synthetic or natural rubber, polyiso-butylene, polyvinyl ether etc. and (A) is oil bitumen, polyisobutylene polyethylene wax, paraffin wax etc. Homogeneous mixts. free from undsipersed high-viscosity material are obtd. in a continuous process, without laborious multi-stage batch mixing using incremental addns. of (A).

公开(公告)号：DE2426198A1

公开(公告)日：1975-12-18

申请号：DE2426198

申请日：1974-05-29

Applicant: BASF AG

Inventor： GRUHN HEINZ ING GRAD ,  JACOBI HANS-RUDOLF DR ING ,  TETZLAFF ERNST DR ING

IPC: B29C49/04 ,  B29C49/58 ,  B29C17/07

Abstract: A method of blow-moulding a hollow thermoplastics object utilises a hollow shaft to introduce the inflating and cooling fluid into the blow-moulding; the hollow shaft conducts the fluid into the blowing mandrel, this mandrel being rotated, esp. at an angular speed of 250-25,000 min-1. Esp. when blow-moulding large objects, the rotation leads to a considerable increase in the heat transfer coefficient. Thus the cooling of the blow-moulding is facilitated.