Sulfolanyloxyalkyl cyclic polysiloxanes

• US 4,049,676 A
• Filed: 06/30/1975
• Issued: 09/20/1977
• Est. Priority Date: 06/30/1975
• Status: Expired due to Term

• Current Assignee: OSI Specialties, Inc.
• Original Assignee: Union Carbide Corporation (Dow, Inc.)
• Inventors: Schilling, Curtis Louis Jr.
• Primary Examiner(s): Thomas, Jr., James O.
• Assistant Examiner(s): Siegel, A.
• Application Number:
  US05/592,092
• Time in Patent Office: 813 Days
• Field of Search: 260/332.1, 260/448.25, 260/448.2 H, 260/448.2 N
• US Class Current: 549/4
• CPC Class Codes: C07F 7/21 Cyclic compounds having at least one ring containing silicon, but no carbon in the ring
• CPC Class Codes: C08G 77/28 sulfur-containing groups
• CPC Class Codes: Y10S 516/01 Wetting, emulsifying, dispersing, or stabilizing agents

Abstract

Provided as novel compositions are sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes. The cyclic polysiloxanes of the invention are especially useful as monomers for the formation of higher molecular weight polymers comprising difunctional dialkylsiloxy units in combination with difunctional sulfolanyloxyalkylmonoalkylsiloxy units.

Claims

1. Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes having the general formula, ##STR11## wherein:

--R'"'"'-- is bivalent alkylene of two to eight carbon atoms;

R is alkyl of one to ten carbon atoms; and

R¹, R², R³ and R⁴ are independently hydrogen or alkyl of one to four carbon atoms.

2. Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes having the general formula, ##STR12## wherein:

c has a value from three to six; and

R is alkyl of one to four carbon atoms.

3. Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes as defined in claim 2 in which --C_c H_2c -- is trimethylene.

4. Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes as defined in claim 2 in which --C_c H_2c -- is --CH₂ CH(CH₃)CH₂ --.

5. Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes as defined in claim 2 in which R is methyl.

6. 3-(Sulfolan-3-yloxy)propylheptamethylcyclotetrasiloxane.