Dithiocarbamate group-containing polyester

• US 5,097,007 A
• Filed: 09/04/1990
• Issued: 03/17/1992
• Est. Priority Date: 09/04/1989
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Petrochemical Co., Ltd. (Mitsubishi Chemical Group Corp.)
• Original Assignee: Misubishi Petrochemical Company Limited
• Inventors: Himori, Shunichi
• Primary Examiner(s): Kight, III, John
• Assistant Examiner(s): Mosley, T.
• Application Number:
  US07/576,788
• Time in Patent Office: 560 Days
• Field of Search: 525/437, 528/272, 528/274
• US Class Current: 528/274
• CPC Class Codes: C08F 293/00 Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule on to polymers modified by introduction of unsaturated end groups C08F290/02
• CPC Class Codes: C08G 63/6886 Dicarboxylic acids and dihydroxy compounds

Abstract

A polyester having dithiocarbamate group at its termini represented by the formula: ##STR1## wherein, in preferred embodiments, R¹ and R² are ethyl, R³ is ##STR2## R⁴ is --CH₂ CH₂ --, and R⁵ is ##STR3## The dithiocarbamate groups in the polymer can easily be dissociated upon irradiation with UV to produce polymeric free radicals, which can initiate an ethylenically unsaturated monomer to form a block copolymer of a molecular structure of ABA where B indicates a block corresponding to the polyester and A indicates a block of the monomer polymerized.

Claims

1. A dithiocarbamate group-containing polyester represented by the formula (I):

##STR17## wherein;

R¹ l and R² independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms,

R³ represents (a) ##STR18## in which R⁶ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, (b) ##STR19## in which R⁶ is as defined above and R⁷ represents an alkylene group having 1 to 10 carbon atoms, (c) ##STR20## in which R⁸ and R⁹ independently represent a hydrogen atom or an alkyl group having 1 to carbon atoms, or (d) ##STR21## in which R¹⁰ represents a linear or branched alkylene group having 1 to 10 carbon atoms;

R⁴ represents a polymer-constituting unit formed by esterifying a dihydric alcohol represented by HO--R⁴ 13 OH in which R⁴ represents (a) a linear or branched alkylene group having 2 to 10 carbon atoms, (b) a polyether polyalkylene group having 2 to 100 carbon atoms, and 1 to 98 oxygen atoms, (c) ##STR22## in which R¹¹ and R¹² independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, or (d) ##STR23## in which R¹¹ and R¹² are as defined above;

R⁵ represents a polymer-constituting unit formed by esterifying a dibasic acid represented by ##STR24## in which R⁵ represents a saturated or unsaturated alkylene group having 2 to 10 carbon atoms, ##STR25## and n is a number of from 10 to 5000.

2. A polyester as set forth in claim 1, wherein R⁵ is ##STR26##

3. A polyester as set forth in claim 1, wherein R⁴ is a residue from disphenol A or a residue from ethyleneglycol.

4. A polyester as set forth in claim 1, wherein R³ is ##STR27## in which R⁶ is as set forth above.

5. A polyester as set forth in claim 1, wherein R³ is ##STR28##

6. A polyester as set forth in claim 1, wherein each of R¹ and R² is an ethyl group.