GLASS FIBER REINFORCED ELASTOMERS

• US 3,658,571 A
• Filed: 04/29/1970
• Issued: 04/25/1972
• Est. Priority Date: 04/29/1970
• Status: Expired due to Term

• Current Assignee: Alfred Marzocchi
• Original Assignee: Alfred Marzocchi
• Inventors: Marzocchi, Alfred
• Primary Examiner(s): Martin, William D.
• Assistant Examiner(s): Cohen, D.
• Application Number:
  US05/032,974
• Time in Patent Office: 727 Days
• Field of Search: 117/72,65.2,115,126GB 118/427,DIG.18
• US Class Current: 428/368
• CPC Class Codes: C03C 25/27 Rubber latex
• CPC Class Codes: Y10S 118/18 Wire and cord die
• CPC Class Codes: Y10T 428/292 In coating or impregnation
• CPC Class Codes: Y10T 428/2964 Artificial fiber or filament

Abstract

Glass fibers for use in glass fiber-reinforced elastomeric materials and method for preparing same wherein a glass fiber bundle is first impregnated with an elastomer or resinous polymer and then is coated with an elastomer compatible material to form an impregnated glass fiber bundle having an inner coating comprising an elastomer or resinous polymer and an outer coating of the elastomer compatible material.

Claims

2. A method as defined in claim 1 wherein said inner layer impregnant constitutes 1-10 percent by weight of said glass fiber.

3. A method as defined in claim 1 wherein the top coating constitutes 2-15 percent by weight of the glass fiber-inner layer system.

4. A method as defined in claim 1 wherein at least one of said compositions contains an anchoring agent.

5. A glass fiber bundle having three impregnant layers therein, the first of said impregnant layers comprising a polymeric material selected from the group consisting of an elastomer and a resinous polymer selected from the group consisting of polyamides, polyesters, polyepoxides, phenolic aldehyde resins and acrylic resins, the second impregnant layer comprising a mixture of said polymeric material and an elastomer compatible material selected from the group consisting of a resorcinol aldehyde latex and a vinyl pyridine-butadiene-styrene terpolymer and the third impregnant layer comprising a top coating in the form of said elastomer compatible material.

6. A glass fiber bundle as defined in claim 5 wherein said inner coating constitutes 1-10 percent by weight of said glass fiber.

7. A glass fiber bundle as defined in claim 5 wherein said outer coating constitutes 2-15 percent by weight of the glass fiber-inner layer system.

8. A glass fiber bundle as defined in claim 5 wherein at least one of said polymeric material and said elastomer compatible material includes an anchoring agent.

9. In the manufacture of glass fiber elastomeric products in which the elastomeric material comprises a continuous phase in which the glass fibers are distributed, the treatment of glass fibers which is effective to establish a strong bonding relationship between the glass fibers and the continuous phase elastomeric material comprising impregnating a glass fiber bundle with a first composition comprising a polymeric material selected from the group consisting of polyamides, polyesters, polyepoxides, phenolic aldehyde resins and acrylic resins to form an inner layer impregnant of said polymeric material in said glass fiber bundle, passing the glass fiber bundle which is still wet with said first composition into a bath of an elastomer compatible material, said bath having immersed therein an orifice through which said bundle is passed whereby turbulence is created in the vicinity of the orifice to intermix the elastomer compatible material with the polymeric material to provide an intermediate impregnant layer comprising a mixture of said polymeric material with an elastomer compatible mAterial, and further coating the resulting bundle with an elastomer compatible material to form a top coating on said glass fiber bundle of said elastomer compatible material, said elastomer compatible material being selected from the group consisting of resorcinol aldehyde latex and a vinyl pyridine-butadiene-styrene terpolymer.

10. A glass fiber bundle having three impregnant layers therein, the first of said impregnant layers comprising a polymeric material selected from the group consisting of polyamides, polyesters, polyepoxides, phenolic aldehyde resins and acrylic resins, the second impregnant layer comprising a mixture of said polymeric material and an elastomer compatible material selected from the group consisting of resorcinol aldehyde latex and a vinyl pyridine-butadiene-styrene terpolymer and the third impregnant layer comprising a top coating in the form of said elastomer compatible material.