Block copolymers containing latent thiol mercaptan chain transfe

Details Block copolymers containing latent thiol mercaptan chain transfe Block copolymers containing latent thiol mercaptan chain transfe

1994-12-09

1996-03-12

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524500, 526224, 560 1, 560 9, 558255, C08F28300

Patent

active

054986753

ABSTRACT:
This invention relates to a block copolymer comprising: a) at least one first block of polymerized units of at least one first ethylenically unsaturated monomer and at least one latent thiol mercaptan chain transfer agent wherein the latent thiol mercaptan chain transfer agent has the general formula; ##STR1## wherein A is a polyvalent organic radical; x and y are positive integers such that x+y equals the valence of A; B is an organic acyl radical; and n and m are integers from 1 to 6; and b) at least one second block of polymerized units of at least one second ethylenically unsaturated monomer, wherein said at least one second block is attached to said at least one first block by reacting with terminal thiol functional groups contained on said at least one first block. In addition, this invention relates to the method of making this block copolymer.

REFERENCES:
patent: 4565854 (1986-01-01), Sato et al.
patent: 4659788 (1987-04-01), Ohta et al.
patent: 4699950 (1987-10-01), Sato et al.
patent: 4788127 (1988-11-01), Bailey et al.
patent: 4797223 (1989-01-01), Amick et al.

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