Terminal cluster vinyl silicones and acrylate cluster silicones therefrom

• US 4,728,709 A
• Filed: 03/10/1986
• Issued: 03/01/1988
• Est. Priority Date: 06/30/1983
• Status: Expired due to Term

• Current Assignee: Loctite Corporation (Henkel AG & Co KGaA)
• Original Assignee: Loctite Corporation (Henkel AG & Co KGaA)
• Inventors: Klemarczyk, Philip, Lin, Samuel Q. S.
• Primary Examiner(s): LILLING, HERBERT J
• Application Number:
  US06/807,933
• Time in Patent Office: 722 Days
• Field of Search: 526/279, 526/245, 528/901, 528/32, 528/15, 528/26, 525/477, 525/193, 525/284, 525/288, 525/479
• US Class Current: 528/15
• CPC Class Codes: C07F 7/081 comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
• CPC Class Codes: C07F 7/0896 Compounds with a Si-H linkage
• CPC Class Codes: C07F 7/1804 Compounds having Si-O-C linkages Si-O-acyl linkages C07F7/1896
• CPC Class Codes: C08C 19/25 Incorporating silicon atoms into the molecule
• CPC Class Codes: C08F 290/128 Polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
• CPC Class Codes: C08F 299/00 Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
• CPC Class Codes: C08G 77/50 by carbon linkages C08G77/485 takes precedence
• CPC Class Codes: Y10S 528/901 Room temperature curable silicon-containing polymer

Abstract

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

(AB).sub.m C or [(AB).sub.m ].sub.n SiR.sub.(4-n)

where the R groups are the same or different organic groups other than acrylic groups or groups co-curable therewith; A is a linear polyorganosiloxane segment containing between 3 and about 50 siloxane repeat units at least 3 of which are acrylic group containing repeat units represented by the formula ##STR1## where R¹ is lower alkyl, the R² groups are the same or different alkylene, alkyleneoxy or alkenylene groups, and y is 0-4; B is a polyorganosiloxane segment represented by the formula ##STR2## where x is an integer of at least 100; C is A or a triorganosilyl group; m is an integer of 1 or more; and n is 3 or 4.

Claims

1. A polyorganosiloxane polymer having terminal vinyl clusters represented by the formula

2. An organosiloxane block copolymer comprising:

(a) at least one siloxane block having at least 100 siloxane units, said units having the formula R₂ SiO,

(b) at least one siloxane block consisting of between 3 and 50 siloxane units of the formula;

space="preserve" listing-type="equation">R.sup.1.sub.2 SiO

and, optionally,

(c) a siloxane block comprising a siloxane unit of the formula

space="preserve" listing-type="equation">RSiO.sub.1.5 or SiO.sub.2

where R is alkyl, substituted alkyl or aryl; and

the R¹ groups are the same or different R, alkenyl groups or alkynyl groups, provided that at least 3 units R¹₂ SiO include an alkenyl or alkynyl group.

3. A block copolymer as in claim 2 where at least 3 units of the formula R¹₂ SiO include a vinyl group.

4. A composition comprising a block copolymer as in claim 2, a siloxane compound with silicon hydride functionality and a hydrosilation catalyst.

5. A composition as in claim 4 where at least 3 units R¹₂ SiO of the block copolymer include a vinyl group.