Glass/plastic compounds

• US 20030064876A1
• Filed: 10/15/2002
• Published: 04/03/2003
• Est. Priority Date: 04/14/2000
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Greiner, Robert, Kapitza, Heinrich, Ochsenkuehn, Manfred
• Granted Patent: US 6,809,134 B2
• Time in Patent Office: Days
• US Class Current: 501/32
• CPC Class Codes: C03C 3/16 containing phosphorus
• CPC Class Codes: C08K 3/40 Glass

Abstract

The thermoplast-based glass/plastic compounds according to the invention contain a low melting point sulfophosphate glass having the following composition: 4 to 10% Li₂O; 4 to 10% Na₂O; 4 to 8% K₂O; 1 to 2% CaO; 35 to 37% ZnO; 0 to 3% La₂O₃; 19 to 22% P₂O₅ and 19 to 22% SO₃, a high-performance thermoplast, an organic additive and/or a mineral filling material and optionally also carbon black and/or a sterically hindered phosphite or phenol.

Claims

1. Glass/plastic compounds based on thermoplastic and containing

a low-melting sulfophosphate glass of the following composition:

4 to 10% of Li₂O, 4 to 10% of Na₂O, 4 to 8% of K₂O, 1 to 2% of CaO, 35 to 37% of ZnO, 0 to 3% of La₂O₃, 19 to 22% of P₂O₅ and 19 to 22% of SO₃,

a high-performance thermoplastic, and

an organic additive and/or a mineral filler, and if appropriate also

carbon black and/or a sterically hindered phosphite or phenol.

2. The glass/plastic compounds as claimed in claim 1, characterized in that they contain a sulfophosphate glass of the following composition:

4.9% of Li₂O, 9.4% of Na₂O, 7.1% of K₂O, 1.6% of CaO, 36.6% of ZnO, 20.0% of P₂O₅ and 20.4% of SO₃.

3. The glass/plastic compounds as claimed in claim 1 or 2, characterized in that the high-performance thermoplastic is a polyether ether ketone, a polyetherimide, a polyphenylene sulfide, a partially aromatic polyamide or a liquid-crystal polymer.

4. The glass/plastic compounds as claimed in one of claims 1 to 3, characterized in that the organic additive is melamine cyanurate, a polysiloxane or a halogenated flame retardant.

5. The glass/plastic compounds as claimed in one or more of claims 1 to 4, characterized in that the mineral filler is mica, calcium sulfate or zinc borate.

6. The glass/plastic compounds as claimed in one or more of claims 1 to 5, characterized in that the level of sulfophosphate glass is 15 to 60% by weight, based on the level of sulfophosphate glass and high-performance thermoplastic.

7. The glass/plastic compounds as claimed in one or more of claims 1 to 6, characterized in that the level of organic additive and/or mineral filler is 5 to 40% by weight, based on the total weight.

8. The glass/plastic compound as claimed in one or more of claims 1 to 7, characterized in that the level of carbon black is 0.1 to 1.0% by weight, based on the total weight.

9. The glass/plastic compound as claimed in one or more of claims 1 to 8, characterized in that the level of phosphite or phenol is 0.5 to 1.5% by weight, based on the total weight.

10. A process for producing glass/plastic compounds as claimed in one or more of claims 1 to 9, characterized in that in a first step, at elevated temperature, a masterbatch with a glass content of 60 to 90% by weight is produced from a sulfophosphate glass and a high-performance thermoplastic, and in that in a second step the glass content is reduced to 15 to 60% by weight by adding further high-performance thermoplastic at elevated temperature, with an organic additive and/or a mineral filler and, if appropriate, carbon black and/or a sterically hindered phosphite or phenol being added at the same time.