Flame-retardant resin compositions, flame-retardant resin molded articles, flame-retardant resin housings, and electronic equipment.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KONICA MINOLTA INC
- Filing Date
- 2022-06-08
- Publication Date
- 2026-06-09
Smart Images
Figure 0007871622000011 
Figure 0007871622000001 
Figure 0007871622000002
Abstract
Claims
1. A flame-retardant resin composition containing at least a thermoplastic resin and a polysaccharide, The thermoplastic resin is a polystyrene-based resin. The aforementioned polysaccharide is an acidic polysaccharide. The aforementioned acidic polysaccharide comprises at least alginic acid, alginate, carrageenan, pectin, or gellan gum. The flame-retardant resin composition further contains a compatibilizer different from the thermoplastic resin, The compatibilizer is a styrene / maleic anhydride copolymer, or a graft polymer of an ethylene-glycidyl methacrylate copolymer and polystyrene. The content of the thermoplastic resin relative to the total mass of the flame-retardant resin composition is within the range of 40.0 to 96.0% by mass. The content of the acidic polysaccharide relative to the total mass of the flame-retardant resin composition is in the range of 2.0 to 50.0% by mass. The content of the compatibilizer relative to the total mass of the flame-retardant resin composition is within the range of 0.1 to 25.0% by mass. A flame-retardant resin composition characterized by the following.
2. The sugar skeleton contained in the aforementioned acidic polysaccharide has a salt of an acidic functional group, The salt of the acidic functional group is a divalent or greater salt. The flame-retardant resin composition according to claim 1.
3. The sugar skeleton contained in the aforementioned acidic polysaccharide has an acidic functional group, or a salt of an acidic functional group. In the aforementioned acidic polysaccharide, the total number of acidic functional groups and salts of acidic functional groups per monosaccharide unit is within the range of 0.20 to 1.
40. The flame-retardant resin composition according to claim 1 or 2.
4. In the aforementioned acidic polysaccharide, the total number of acidic functional groups and salts of acidic functional groups per monosaccharide unit is within the range of 0.60 to 1.
20. The flame-retardant resin composition according to claim 3.
5. The content of the acidic polysaccharide relative to the total mass of the flame-retardant resin composition is in the range of 5.0 to 40.0% by mass. The flame-retardant resin composition according to claim 1 or 2.
6. The content of the compatibilizer relative to the total mass of the flame-retardant resin composition is in the range of 0.5 to 20.0% by mass. The flame-retardant resin composition according to claim 1 or 2.
7. The alginate is calcium alginate. The flame-retardant resin composition according to claim 1 or 2.
8. The compatibilizer is a styrene / maleic anhydride copolymer. The flame-retardant resin composition according to claim 1 or 2.
9. The acid value of the styrene / maleic anhydride copolymer is in the range of 50 to 500 mg / KOH. The flame-retardant resin composition according to claim 8.
10. The acid value of the styrene / maleic anhydride copolymer is in the range of 100 to 500 mg / KOH. The flame-retardant resin composition according to feature 9.
11. The softening point of the thermoplastic resin is 200°C or lower. The flame-retardant resin composition according to claim 1 or 2.
12. Formed using the flame-retardant resin composition according to claim 1 or claim 2 A flame-retardant resin molded product characterized by the following.
13. Includes a flame-retardant resin molded article as described in claim 12. A flame-retardant resin housing characterized by the following features.
14. The flame-retardant resin molded article is provided as described in claim 12. An electronic device characterized by the following features.