Hydrogenpolysiloxanes and methods of making

• US 5,256,754 A
• Filed: 04/13/1992
• Issued: 10/26/1993
• Est. Priority Date: 10/31/1990
• Status: Expired due to Fees

• Current Assignee: Shin-Etsu Chemical Company Limited
• Original Assignee: Shin-Etsu Chemical Company Limited
• Inventors: Yoshikawa, Yuji, Isobe, Kenichi, Takarada, Mitsuhiro
• Primary Examiner(s): Marquis, Melvyn I.
• Assistant Examiner(s): Glass, M.
• Application Number:
  US07/867,464
• Time in Patent Office: 561 Days
• Field of Search: 556/440, 556/451, 528/15, 528/31, 528/25, 528/23, 528/32, 528/34, 528/37
• US Class Current: 528/31
• CPC Class Codes: C08G 77/12 containing silicon bound to hydrogen C08G77/045 takes precedence
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence
• CPC Class Codes: C08G 77/38 Polysiloxanes modified by chemical after-treatment C08G77/045 takes precedence

Abstract

Hydrogenpolysiloxanes having a (meth)acryloxypropyl group on a side chain are useful intermediates. They are prepared by equilibration reaction of siloxane compounds.

Claims

1. A method for producing a hydrogenpolysiloxane having a (meth)acryloxypropyl group of the following average composition formula (1):

##STR27## wherein R is an alkyl group having 1 to 6 carbon atoms or phenyl group,

R'"'"' is a hydrogen atom or methyl group, and letters a, b, and c are positive numbers within the range;

0<

a<

20, 0<

b<

3, and 0<

c<

10, comprising the step of effecting equilibration reaction of compounds of the following formulae (3), (4), (5), and (6);

##STR28## wherein x, y, and z are integers of from 3 to 10.

2. A method for producing a hydrogenpolysiloxane having a (meth)acryloxypropyl group of the following average composition formula (2):

##STR29## wherein R is an alkyl group having 1 to 6 carbon atoms or phenyl group,

R'"'"' is a hydrogen atom or methyl group, and

letters a, b, and d are positive numbers within the range;

0<

a<

20, 0<

b<

3, and 1<

d<

10, comprising the step of effecting equilibration reaction of compounds of the following formulae (7), (4), (5), and (6);

##STR30## wherein x, y, and z are integers of from 3 to 10.

4. A method for producing a hydrogenpolysiloxane having a (meth)acryloxypropyl group of the following average composition formula (2):

##STR33## wherein R is an alkyl group having 1 to 6 carbon atoms or phenyl group,

R'"'"' is a hydrogen atom or methyl group, and

letters a, b, and d are positive numbers within the range;

0<

a<

20, 0<

b<

3, and 1<

d<

10, comprising the step of effecting hydrolysis and equilibration reaction of compounds (A) compounds of the following formulae (7), (8), (9), and (6);

##STR34## wherein R and R'"'"' are as defined in claim 2, R" is a methyl or ethyl group, and z is an integer of from 3 to 10 and water or (B) compounds of the following formulae (10), (11), (8), and (9);

##STR35## wherein R, R'"'"', and R" are as defined above, and m is an integer of from 1 to 20 and n is an integer of from 1 to 100 and water.

3. A method for producing a hydrogenpolysiloxane having a (meth)acryloxypropyl group of the following average composition formula (1):

##STR31## wherein R is an alkyl group having 1 to 6 carbon atoms or phenyl group,

R'"'"' is a hydrogen atom or methyl group, and letters a, b, and c are positive numbers within the range;

0<

a<

20, 0<

b<

3, and 0<

c<

10, comprising the step of effecting hydrolysis and equilibration reaction among compounds of the following formulae (3), (8), (9), and (6);

##STR32## wherein R" is a methyl or ethyl group, and z is an integer of from 3 to 10 and water.