Organosilicon primer compositions

• US 4,719,262 A
• Filed: 11/28/1986
• Issued: 01/12/1988
• Est. Priority Date: 03/26/1986
• Status: Expired due to Fees

• Current Assignee: Emtec Magnetics GmbH (Glassbridge Enterprises, Inc.)
• Original Assignee: Dow, Inc.
• Inventors: Plueddemann, Edwin P.
• Primary Examiner(s): Marquis, Melvyn I.
• Application Number:
  US06/922,380
• Time in Patent Office: 410 Days
• Field of Search: 525/100, 525/105, 525/106, 528/32, 528/31, 556/431, 556/440, 556/444, 556/443
• US Class Current: 525/105
• CPC Class Codes: C03C 17/30 with silicon-containing compounds
• CPC Class Codes: C07F 7/04 Esters of silicic acids
• CPC Class Codes: C07F 7/1804 Compounds having Si-O-C linkages Si-O-acyl linkages C07F7/1896
• CPC Class Codes: C08G 77/04 Polysiloxanes
• CPC Class Codes: C08L 2666/44 Silicon-containing compounds
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C09D 143/04 Homopolymers or copolymers of monomers containing silicon
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16

Abstract

This invention provides novel silanes and bis-silylhydrocarbons that contain a plurality of silicon-bonded alkoxy groups and at least one substituent that is bonded to silicon through oxygen and contains at least four carbon atoms, two of which form a terminal group of the formula CH₂ ═CH--. A preferred class of these compounds will cohesively bond polyorganosiloxane elastomers and resins to both organic and inorganic substrates.

Claims

1. A primer composition for adhering a curable polyorganosiloxane elastomer composition to an inorganic substrate, said primer composition comprising an organosilicon compound having a general formual selected from the group consisting of

View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)

2. A primer composition according to claim 1 where R⁶ is alkylene, phenylene, alkoxy substituted phenylene or the residue remaining following removal of one terminal hydroxyl group from a hydroxyl terminated polybutadiene having an average degree of polymerization of between 50 and 60.

3. A compound according to claim 1 where R¹ is CH₂ ═

CHR⁶ OR⁷ --, R⁶ is methylene and R⁷ is ##STR3##

4. A primer composition according to claim 1 where R¹ is CH₂ CHR⁶ OC(O)R⁸, where R⁶ represents alkylene containing from 1 to 10 carbon atoms, and R⁸ represents alkylene containing from 1 to 10 carbon atoms, phenylene, hydroxyl substituted phenylene or methoxy substituted phenylene.

5. A primer composition according to claim 1 where R¹ is CH₂ ═

CHR⁹ C(O)OR⁷ --, and where R⁹ represents a single bond and R⁷ represents alkylene containing from 2 to 10 carbon atoms, hydroxyl substituted alkylene containing from 3 to 10 carbon atoms or phenylene.

6. A primer composition according to claim 1 where R¹ is (CH₂ ═

CHR⁶ O)₂ R¹⁰, R⁶ is methylene and R¹⁰ is ##STR4##

7. A primer composition according to claim 1 where R⁴ is CH₂ ═

CHR¹⁰, where R⁶ is methylene and R¹⁰ is ##STR5##

8. A primer composition according to claim 1 where said primer includes a copolymer consisting essentially of from 10 to 95 weight percent of repeating units derived from 3-(methacryloxypropyl)trimethoxysilane and from 5 to 90 percent by weight of repeating units derived from methyl methacrylate.

9. A primer composition according to claim 8 where said silane constitutes from 40 to 60 weight percent of the combination of said compound and said copolymer.

10. A primer composition according to claim 9 where said organosilicon compound exhibits the general formula CH₂ ═

CHR⁶ OR⁷ -- or (CH₂ ═

CHR⁶ O)₂ R¹⁰ where R⁶ is methylene, R⁷ is ##STR6## and R¹⁰ is ##STR7##