Cluster acrylic silicones having cyclic clusters

• US 4,760,122 A
• Filed: 01/06/1986
• Issued: 07/26/1988
• Est. Priority Date: 06/22/1984
• Status: Expired due to Term

• Current Assignee: Loctite Corporation (Henkel AG & Co KGaA)
• Original Assignee: Loctite Corporation (Henkel AG & Co KGaA)
• Inventors: Lin, Samuel Q., Nakos, Steven T.
• Primary Examiner(s): Lilling, Herbert J.
• Application Number:
  US06/816,519
• Time in Patent Office: 932 Days
• Field of Search: 526/242, 526/243, 526/245, 526/247, 526/248, 526/249, 526/266, 526/279, 525/288, 525/478, 525/479, 525/901, 525/910, 528/15, 528/26, 528/32
• US Class Current: 526/242
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence
• CPC Class Codes: C08G 77/50 by carbon linkages C08G77/485 takes precedence
• CPC Class Codes: Y10S 525/901 Radial block
• CPC Class Codes: Y10S 525/91 Polymer from ethylenic monomers only, having terminal unsaturation

Abstract

Novel polyorganosiloxane polymers having at least one terminal cyclic diorganosiloxane moiety containing a plurality of acrylic units of the formula ##STR1## wherein R¹ is H or lower alkyl; X is O, NH or S; and Y is a divalent linking group.

Claims

1. A polyorganosiloxane polymer having a structure represented by one of the formulas:

space="preserve" listing-type="equation">(AB).sub.m C or [(AB).sub.m ].sub.n SiR.sub.(4-n)

where A is a cyclic diorganosiloxane moiety comprising between 4 and 8 siloxane repeat units, including a plurality of units of the formula ##STR15## where R¹ is H or lower alkyl, X is O, NH or S, and Y is a divalent linking group;

B is an organosiloxane segment represented by the formula;

##STR16## C is A or triorganosilyl group;

the R groups are the same or different organo groups other than acrylic groups or groups co-curable therewith;

m is an integer of 1 or more;

n is 3 or 4; and

x is an integer of at least 100.

2. A polyorganosiloxane as in claim 1 where the A segment is defined by the formula:

##STR17## where R is as previously defined, R¹ is H or alkyl, R² is alkylene or alkenylene and m is 3-7.

3. A polyorganosiloxane as in claim 2 where R is H.

4. A polyorganosiloxane as in claim 3 where m is 3.

5. A polyorganosiloxane as in claim 2 represented by the formula:

##STR18## where R is methyl, R¹ is H and R² is propenyl, and t is an integer of from 1 to 5.

6. A polyorganosiloxane as in claim 1 where the A segment is defined by the formula:

##STR19## where R, is as defined in claim 1, R is H or alkyl, R² is alkylene or alkenylene and R⁴ is hydrocarbyl oxyhydrocarbyl, halo substituted hydrocarbyl or ##STR20## j is at least 2, k is 1-2, l is 0-5 and j+k+l=4-8.

7. A polyorganosiloxane as in claim 6 where l is 0-0.5.

8. A polyorganosiloxane as in claim 6 where j is at least 2.5 and k is 1-1.5.

9. A polyorganosiloxane as in claim 6 represented by the formula:

##STR21##

10. A polyorganosiloxane as in claim 6 represented by the formula:

##STR22##

11. A polyorganosiloxane represented by the formula A BC where A is a monovalent cyclic organosiloxane represented by the formula:

##STR23## where R is alkyl or aryl, R¹ is H or alkyl, R² is alkylene or alkenylene, R⁴ is hydrocarbyl, oxyhydrocarbyl, halo substituted hydrocarbyl or ##STR24## j is at least 2, k is 1-2, l is 0-5 and j+k+l is 4-8;

B is represented by the formula;

##STR25## where x is at least 2; and

C is A or a triorganosilyl group.

12. A polyorganosiloxane as in claim 11 where C is A.

13. A polyorganosiloxane as in claim 11 where C is ##STR26##