Sizing composition for glass yarns, the glass yarns thus obtained and composite materials comprising said yarns

• US 20050119395A1
• Filed: 12/05/2002
• Published: 06/02/2005
• Est. Priority Date: 12/05/2001
• Status: Active Grant

• Current Assignee: Ocv Intellectual Capital, Llc (Owens Corning)
• Original Assignee: Saint-gobain Fabrics Europe Co.
• Inventors: Moireau, Patrick
• Granted Patent: US 7,241,499 B2
• Time in Patent Office: Days
• US Class Current: 524/494
• CPC Class Codes: C03C 25/26 Macromolecular compounds or prepolymers
• CPC Class Codes: Y10T 428/2907 with coating or impregnation
• CPC Class Codes: Y10T 428/2933 Coated or with bond, impregnation or core
• CPC Class Codes: Y10T 428/2938 Coating on discrete and individual rods, strands or filaments
• CPC Class Codes: Y10T 428/2962 Silane, silicone or siloxane in coating
• CPC Class Codes: Y10T 428/2964 Artificial fiber or filament

Abstract

The invention relates to a sizing composition composed of a solution comprising at least 5% by weight of solvent and comprising a thermally curable base system, said system comprising at least 60% by weight of components with a molecular mass of less than 750 and at least 60% by weight of components of a mixture: of component(s) exhibiting at least one epoxy reactive functional group, of component(s) exhibiting at least one amine, preferably primary or secondary amine, reactive functional group, and of component(s) exhibiting at least one hydroxyl reactive functional group. Another subject matter of the invention relates to the glass strands coated with the abovementioned sizing composition. The glass strands obtained are capable of being used to reinforce organic or inorganic materials.

Claims

1. A glass strand coated with a sizing composition composed of a solution comprising at least 5% by weight of solvent and comprising a thermally curable base system, said system comprising at least 60% by weight of components with a molecular mass of less than 750 and at least 60% by weight of components of a mixture:

of component(s) exhibiting at least one epoxy reactive functional group,

of component(s) exhibiting at least one amine, preferably primary or secondary amine, reactive functional group,

and of component(s) exhibiting at least one hydroxyl reactive functional group.

2. The glass strand as claimed in claim 1, wherein said thermally curable base system represents between 75 and 100% by weight of the composition.

3. The glass strand as claimed in claim 1, wherein said thermally curable base system is composed to 80% and up to 100% by weight of epoxy component(s), of amine component(s) and of hydroxyl component(s).

4. The glass strand as claimed in claim 1, wherein said thermally curable base system comprises at least 70% by weight by weight of component(s) with a molecular mass of less than 750.

5. The glass strand as claimed in claim 1, wherein the ratio r of the number of epoxy reactive sites to the sum of the number of amine reactive sites and of the number of hydroxyl sites is between 0.2 and 2.5.

6. The glass strand as claimed in claim 1, wherein the ratio r′

of the number of amine reactive sites to the number of hydroxyl reactive sites is between 0.5 and 20.

7. The glass strand as claimed in claim 1, wherein the content of said epoxy component(s) is between 15 and 85% by weight of the sizing composition.

8. The glass strand as claimed in claim 1, wherein the content of said amine component(s) is greater than or equal to 5% by weight of the sizing composition.

9. The glass strand as claimed in claim 1, wherein the content of said hydroxyl component(s) is greater than or equal to 5% by weight of the sizing composition.

10. The glass strand as claimed in claim 1, wherein said sizing composition additionally comprises a catalyst in a proportion of less than 8% by weight.

11. The glass strand as claimed in claim 1, wherein said sizing composition additionally comprises a coupling agent in proportions of between 0 and 30% by weight.

12. The glass strand as claimed in claim 1, wherein said sizing composition additionally comprises a textile processing agent in proportions of between 0 and 30% by weight.

13. The glass strand as claimed in claim 1, wherein said sizing composition additionally comprises a film-forming agent in a proportion of less than or equal to 8% by weight.

14. The glass strand as claimed in claim 1, wherein said sizing composition comprises at least one corrosion inhibitor, such as gallic acid or its derivatives.

15. The glass strand as claimed in claim 1, wherein said thermally curable base system is composed of epoxy component(s), of amine component(s) including two amine reactive functional groups and of component(s) including at least one hydroxyl reactive functional group.

16. The glass strand as claimed in claim 14, wherein said amine reactive functional groups are primary and/or secondary amine reactive functional groups.

18. A composite comprising at least one organic and/or inorganic material and sized glass strands, characterized in that all or a portion of the glass strands are composed of sized glass strands as claimed in claim 1.

17. A sizing composition, in particular for glass strands, composed of a solution comprising at least 5% by weight of solvent and comprising a thermally curable base system, said system comprising at least 60% by weight of components with a molecular mass of less than 750 and at least 60% by weight of components of a mixture:

of component(s) exhibiting at least one epoxy reactive functional group,

of component(s) exhibiting at least one amine, preferably primary or secondary amine, reactive functional group,

and of component(s) exhibiting at least one hydroxyl reactive functional group.