Process for the manufacturing of acrylic organopolysiloxanes

• US 5,292,849 A
• Filed: 12/28/1992
• Issued: 03/08/1994
• Est. Priority Date: 12/27/1991
• Status: Expired due to Term

• Current Assignee: Shin-Etsu Chemical Company Limited
• Original Assignee: Shin-Etsu Chemical Company Limited
• Inventors: Fujioka, Kazutoshi, Arai, Masatoshi, Sakamoto, Takafumi
• Primary Examiner(s): Marquis, Melvyn I.
• Application Number:
  US07/997,485
• Time in Patent Office: 435 Days
• Field of Search: 528/18, 528/34, 526/279
• US Class Current: 528/18
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence

Abstract

This invention enables the selective and easy manufacturing of acrylic organopolysiloxanes which are cured by the irradiation of UV light, by the reaction of the hydroxyl group containing organosilicon compounds (A) of formula (1): ##STR1## wherein each R¹ independently is a substituted or an unsubstituted monovalent hydrocarbon group, and n designates integers from 1 to 10,000 with the acrylic group containing silane compounds (B) of formula (2): ##STR2## wherein each R² and R³ independently is a substituted or an unsubstituted monovalent hydrocarbon group, R⁴ is either a hydrogen atom or a methyl group, and each of a and b is an integer from 1 to 3, in the presence of a divalent tin compound of formula (3):

SnX.sub.2

wherein each X independently is a halogen atom, alkoxy group, or a residue of a carboxyl group, in order to produce the acrylic organopolysiloxanes of formula (4): ##STR3## wherein R¹ through R⁴, n, a and b are described as above.

Claims

1. A process for the production of an acrylic organopolysiloxane, comprising reacting a hydroxyl group containing organosilicon compound (A) of formula (1):

##STR13## wherein each R¹ independently is a substituted or an unsubstituted monovalent hydrocarbon group, and n is an integer from 1 to 10,000, with an acrylic group-containing silane compound (B) of formula (2);

##STR14## wherein each of R² and R³ independently is a substituted or an unsubstituted monovalent hydrocarbon group, R⁴ is a hydrogen atom or a methyl group, and each of a and b independently is an integer from 1 to 3, in the presence of a divalent tin compound of formula (3);

space="preserve" listing-type="equation">SnX.sub.x (

     3)

wherein each X independently is a halogen atom, an alkoxy group, or the residue of carboxylic acid, to produce an acrylic organopolysiloxane of formula (4);

##STR15## wherein R¹ through R⁴, n, a and b are as described above.

2. A process according to claim 1, wherein R¹, R² and R³ are each independently alkyl, alkenyl, cycloalkyl, aryl, aralkyl of 1-10 carbon atoms, each optionally substituted by halogen or cyano.

3. A process according to claim 1, wherein R¹ is methyl, ethyl, propyl, butyl, hexyl, octyl, vinyl, allyl, butenyl, hexenyl, cyclohexyl, phenyl, tolyl, benzyl, 2-phenyl ethyl, chloromethyl or 3,3,3-trifluoropropyl.

4. A process according to claim 1, wherein R² is C_1-10 -alkyl or alkoxy-substituted alkyl with 1 to 10 carbon atoms.

5. A process according to claim 3, wherein R² is C_1-10 -alkyl or alkoxy-substituted alkyl with 1 to 10 carbon atoms.

6. A process according to claim 1, wherein organosilicon compound (A) is:

##STR16##

7. A process according to claim 1, wherein silane compound (B) is ##STR17##

8. A process according to claim 1, wherein the divalent tim compound is SnCl₂, SnBr₂, SnI₂, Sn(OOCCH₃)₂, SnC₂ O₄, Sn(OOCC₇ H₁₅)₂, Sn(OMe)₂ or Sn(OOCC₁₅ H₃₁)₂.