公开(公告)号：US3577502A

公开(公告)日：1971-05-04

申请号：US3577502D

申请日：1968-02-09

Applicant: SHELL OIL CO

Inventor： SELMAN JAN ,  OOSTERHOF HENDRICUS A

IPC: B29C71/00 ,  C08K3/00 ,  C08K5/00 ,  C08L67/00 ,  B29C25/00 ,  C08G17/02 ,  D01F1/02

CPC classification number: C08J7/08 ,  C08J2367/04 ,  C08K3/01 ,  C08K5/0008 ,  C08K5/0083 ,  C08L67/04

Abstract: THE EXTENSIBILITY, IMPACT PROPERTIES, HARDNESS, SOFTENING TEMPERATURE, WATER ABSORPTION AND SOLVENT RESISTANCE OF SHAPED ARTICLES OF SUBSTANTIALLY UNSTRETCHED POLYLACTONES (POLYPIVALOLACTONE) ARE SIGNIFICANTLY IMPROVED BY THERMAL AFTER-TREATMENT, I.E., BY ANNEALING WITHOUT DEFORMATION AT A TEMPERATURE BETWEEN ABOUT 140* AND 230*C.

公开(公告)号：US3483275A

公开(公告)日：1969-12-09

申请号：US3483275D

申请日：1966-03-17

Applicant: SHELL OIL CO

Inventor： WATERMAN JACQUES A ,  SELMAN JAN

IPC: C08C19/02 ,  C08L19/00 ,  C08L27/06 ,  C08L57/00 ,  C08F41/12 ,  C08F29/36

CPC classification number: C08L27/06 ,  C08C19/02 ,  C08L19/00 ,  C08L57/00 ,  C08L57/06 ,  C08L15/00 ,  C08L27/02 ,  C08L2666/04

公开(公告)号：US3621003A

公开(公告)日：1971-11-16

申请号：US3621003D

申请日：1969-08-13

Applicant: SHELL OIL CO

Inventor： SELMAN JAN ,  VLIET HENDRIK VAN DER

IPC: C08G63/08 ,  C08G63/82 ,  C08G17/017 ,  C08G53/00

CPC classification number: C08G63/08 ,  C08G63/823

Abstract: A polymer of a Beta -lactone is degassed by heating the polymer in the molten state at a temperature of at least 275* C. The process is applicable to polymers which have been prepared at temperatures below the polymer''s melting point. An example of such a preparation is a slurry-polymerization of pivalolactone. The resulting degassed polymer can be molded, extruded or injected into articles, nibs or threads.

公开(公告)号：US3465067A

公开(公告)日：1969-09-02

申请号：US3465067D

申请日：1966-02-21

Applicant: SHELL OIL CO

Inventor： WATERMAN JACQUES A ,  SELMAN JAN

IPC: C08L9/00 ,  C08L13/00 ,  C08L27/02 ,  C08L27/04 ,  C08L27/08 ,  C08F29/22 ,  C08F29/24

CPC classification number: C08L27/02 ,  C08L9/00 ,  C08L13/00 ,  C08L27/04 ,  C08L27/08 ,  C08L2666/04