Process for preparation of a polymer having reactive terminal group

• US 5,247,021 A
• Filed: 08/27/1992
• Issued: 09/21/1993
• Est. Priority Date: 06/06/1989
• Status: Expired due to Term

• Current Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
• Original Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
• Inventors: Noda, Koji, Fujisawa, Hiroshi
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): Zitomer, Fred
• Application Number:
  US07/933,903
• Time in Patent Office: 390 Days
• Field of Search: 526/194, 526/348, 526/348.6, 526/348.7, 525/254, 525/342
• US Class Current: 525/254
• CPC Class Codes: C08F 10/10 Isobutene
• CPC Class Codes: C08F 2/38 Polymerisation using regulators, e.g. chain terminating agents , e.g. telomerisation
• CPC Class Codes: C08F 4/005 Friedel-Crafts catalysts in general

Abstract

Disclosed is a process for preparing an isobutylene-type allyl-terminated polymer, the process comprising mixing:

(A) a cationically polymerizable isobutylene-containing monomer;

(B) an organic compound serving as an initiator and concurrently as a chain transfer agent, the organic compound being represented by the formula (I) ##STR1## (C) at least one Lewis acid selected from the group consisting of (C₂ H₅)₂ AlCl, (C₂ H₅)AlCl₂, SnCl₄ and TiCl₄ ; and

(D) a compound serving as an end capping agent, the compound being represented by the formula (II) ##STR2## whereby the cationically polymerizable monomer is polymerized.

Claims

1. A process for preparing an isobutylene-type allyl-terminated polymer, the process comprising mixing:

(A) a cationically polymerizable isobutylene-containing monomer;

(B) an organic compound serving as an initiator and concurrently as a chain transfer agent, the organic compound being represented b the formula (I) ##STR23## wherein X is a halogen atom, a RCOO-group (wherein R is a monovalent organic group, the same hereinafter) or a RO-group, R³ is a polyvalent aromatic ring group or a substituted or unsubstituted polyvalent aliphatic hydrocarbon group, and R¹ and R² are the same or different and each represent a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group, provided that when R³ is a polyvalent aliphatic hydrocarbon group, R¹ and R² can not be concurrently a hydrogen atom;

(C) a Lewis acid selected from the group consisting of SnCl₄ and TiCl₄ ; and

(D) a compound serving as an end capping agent, the compound being represented by the formula (II) ##STR24## wherein R⁴, R⁵ and R⁶ are the same or different, and each represent a monovalent organic group or a monovalent organic group containing 1 to 3 silicon atoms, whereby the cationically polymerizable monomer is polymerized at -40°

to 10°

C.

2. A process according to claim 1 wherein the amount of the component (C) used is 0.0001 to 0.5 equivalent based on X in the organic compound of the formula (I) serving as the component (B).

3. A process according to claim 1 wherein the compound of the formula (II) used as the component (D) is at least one compound selected from the compounds of the formulas:

##STR25##

4. A process according to claim wherein the polymerization reaction is conducted at -40°

to 10°

C.