Ralph Thomas Hansen

US Patent:

46877975, Aug 18, 1987

Filed:

Sep 2, 1986

Appl. No.:

6/901974

Inventors:

Ralph H. Hansen - Lincoln MA

Assignee:

Canusa Coating Systems Limited - Rexdale

International Classification:

C07D20948
C08K 534

US Classification:

524 94

Abstract:

##STR1## where X is 1, 2 or 3; Y is Cl or Br; R. sub. 1 is tert-butyl (t-butyl) and R. sub. 2 is H or lower alkyl of 1 to 4 carbons. The preferred group of compounds is where OH is at the 4 position, R. sub. 1 is at the 3 position and R. sub. 2 is at the 5 position of the phenyl ring. The most preferred compound is where X is 2, R. sub. 1 and R. sub. 2 are both t-butyl at the 3 and 5 positions of the phenyl ring and OH is at the 4 position of the phenyl ring and Y is Br. The compounds are useful as antioxidants and flame retardants.

US Patent:

44655711, Aug 14, 1984

Filed:

Nov 8, 1982

Appl. No.:

6/439865

Inventors:

Ralph H. Hansen - Lincoln MA

Assignee:

Canusa Coating Systems Limited - Ontario

International Classification:

C07D20994
C08K 534

US Classification:

2041592

Abstract:

A compound of the formula (I) ##STR1## Polymer compositions including antioxidants and the compounds or the compound alone are useful as electrical insulation e. g. , for copper cable, as heat shrinkable (heat recoverable) parts or as other plastic parts to improve the retention of mechanical and/or electrical properties of the insulation or parts.

US Patent:

45201463, May 28, 1985

Filed:

Sep 27, 1983

Appl. No.:

6/536341

Inventors:

Ralph H. Hansen - Lincoln MA

Assignee:

Canusa Coating Systems Limited - Rexdale

International Classification:

C07D20948
C08K 534

US Classification:

524 94

Abstract:

##STR1## where X is 1, 2 or 3; Y is Cl or Br; R. sub. 1 is tert-butyl (t-butyl) and R. sub. 2 is H or lower alkyl of 1 to 4 carbons. The preferred group of compounds is where OH is at the 4 position, R. sub. 1 is at the 3 position and R. sub. 2 is at the 5 position of the phenyl ring. The most preferred compound is where X is 2, R. sub. 1 and R. sub. 2 are both t-butyl at the 3 and 5 positions of the phenyl ring and OH is at the 4 position of the phenyl ring and Y is Br. The compounds are useful as antioxidants and flame retardants.

US Patent:

45145334, Apr 30, 1985

Filed:

Sep 27, 1983

Appl. No.:

6/536182

Inventors:

Ralph H. Hansen - Lincoln MA

Assignee:

Canusa Coating Systems Limited - Rexdale

International Classification:

C08K 534

US Classification:

524 89

Abstract:

##STR1## where X is 1, 2 or 3; Y is Cl or Br; R. sub. 1 is tert-butyl (t-butyl) and R. sub. 2 is H or lower alkyl of 1 to 4 carbons. The preferred group of compounds is where OH is at the 4 position, R. sub. 1 is at the 3 position and R. sub. 2 is at the 5 position of the phenyl ring. The most preferred compound is where X is 2, R. sub. 1 and R. sub. 2 are both t-butyl at the 3 and 5 positions of the phenyl ring and OH is at the 4 position of the phenyl ring and Y is Cl. The compounds are useful as antioxidants and flame retardants.

US Patent:

44642407, Aug 7, 1984

Filed:

Nov 8, 1982

Appl. No.:

6/439864

Inventors:

Ralph H. Hansen - Lincoln MA

Assignee:

Canusa Coating Systems Limited - Ontario

International Classification:

C07D20952
C08K 534

US Classification:

2041592

Abstract:

Compounds of the formula (I) ##STR1## where Y is H, Cl or Br with at least one Y always being Cl or Br and X is S or S--S. Polymer compositions including antioxidants and the compounds or the compound alone are useful as electrical insulation e. g. , for copper cable, as heat shrinkable (heat recoverable) parts or as other plastic parts to improve the retention of mechanical and/or electrical properties of the insulation or parts.