Thermoset polymers with polyfluoroalkylsiloxane modified surfaces

• US 20020068788A1
• Filed: 10/17/2001
• Published: 06/06/2002
• Est. Priority Date: 10/17/2000
• Status: Active Grant

• Current Assignee: RES Development Corporation
• Original Assignee: RES Development Corporation
• Inventors: Goldberg, Eugene G., Sterling, Robert E.
• Granted Patent: US 6,841,602 B2
• Time in Patent Office: Days
• US Class Current: 524/588
• CPC Class Codes: C08J 3/20 Compounding polymers with additives, e.g. colouring
• CPC Class Codes: C08L 101/00 Compositions of unspecified macromolecular compounds
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers

Abstract

A mixture comprising a cross-linkable thermosetting resin precursor and a polyfluoroalkylsiloxane curable to form a composition comprising a cross-linked thermoset resin containing the polyfluoroalkylsiloxane in a gradient concentration through a cross-section thereof.

Claims

1. A mixture comprising (1) a cross-linkable thermosetting resin providing composition and intimately admixed therewith, (2) from about 0.01 to about 5%, by weight, based on the weight of the mixture of an additive comprising a polyfluoroalkylsiloxane, said additive having a lower surface energy than that of the thermoset resin formed by cross-linking said composition;

said additive being a polyfluoroalkylsiloxane having the formula;

2. A mixture according to claim 1 wherein said additive is a polytrifluoropropylmethylsiloxane or a copolymer of said polytrifluoropropylmethylsiloxane.

3. A mixture according to claim 1 wherein each of said alkyl groups may be methyl, ethyl, propyl, butyl, octyl or dodecyl.

4. A method of forming a composition of matter comprising a cross-linked thermoset resin and from about 0.01 to about 5%, by weight of an additive comprising a polyfluoroalkylsiloxane, said additive having a lower surface energy than that of said resin;

said method comprising intimately admixing with a cross-linkable thermosetting resin providing composition (I) a polyfluoroalkylsiloxane having the formula;

5. A method according to claim 4 including a preliminary step of forming a pre-mix comprising a fractional portion of said cross-linkable thermosetting resin composition (I) in particulate form substantially uniformly wetted with said polyfluoroalkylsiloxane and mixing said wetted first fraction with the remainder of said cross-linkable thermosetting resin composition (I).

6. A method according to claim 4 wherein each of said alkyl groups may be methyl, ethyl, propyl, butyl, octyl or dodecyl.

7. A method according to claim 4 wherein said polyfluoroalkylsiloxane is a polytrifluoropropylmethylsiloxane or a copolymer of said polytrifluoropropylmethylsiloxane.

8. The composition of matter produced by the method of claim 4.

9. A composition according to claim 8 wherein each of said alkyl groups may be methyl, ethyl, propyl, butyl, octyl or dodecyl.

10. A composition according to claim 8 wherein said polyfluoroalkylsiloxane is a polytrifluoropropylmethylsiloxane or a copolymer of said polytrifluoropropylmethylsiloxane.

11. A composition of matter comprising (1) a cross-linked thermoset resin and (2) from about 0.01 to about 5%, by weight, based on total weight of the composition of a polyfluoroalkylsiloxane having the formula:

12. A composition according to claim 11 wherein each of said alkyl groups may be methyl, ethyl, propyl, butyl, octyl or dodecyl.

13. A composition according to claim 11 wherein said polyfluoroalkylsiloxane is a polytrifluoropropylmethylsiloxane or a copolymer of said polytrifluoropropylmethylsiloxane.