Claims
- 1. A composition comprising:
- a) a thermotropic liquid crystalline polymer which is an aromatic polyester, poly(ester-amide), poly(ester-imide), poly(ester-amide-imide), or mixtures thereof, and
- b) 1.0-10 weight percent of an inorganic additive selected from zeolites and titanosilicates, said weight percent of said additive being based on weight of said thermotropic liquid crystalline polymer,
- wherein:
- i) when prepared into a polymer bar thickness of 0.79 mm,burn time of said polymer bar is reduced by at least 15% when tested according to Underwriter's Laboratories test UL-94, the tested sample having been aged before testing for 7 days at 70.degree. C., and
- ii) when said inorganic additive is a zeolite, said zeolite has a Si/Al molar ratio of 5 or less, and said composition has a flexural strength of at least 905 of the flexural strength of said thermotropic liquid crystalline polymer in the absence of said inorganic additive zeolite having a Si/Al molar ratio of 5 or less.
- 2. The compostion of claim 1 wherein said inorganic additive is zeolite having a Si/Al molar ration of 5 or less.
- 3. The compositon of claim 1 which has a rating of v-O in test UL-94.
- 4. The compositon of claim 1 wherein said UL-94 burn time is reduced by at least 30% or more.
- 5. The composition of claim 2 comprising 2.0-8.0 weight percent zeolite based on the weight of said thermoplastic liquid crystalline polymer.
- 6. The composition of claim 5 comprising 2.0-5 weight percent zeolite based on the weight of said thermoplastic liquid crystalline polymer.
- 7. The composition of claim 1 wherein said thermotropic liquid crystalline polymer is an aromatic polyester.
- 8. An article produced from the composition of claim 1.
- 9. A method for making wholly aromatic polyester resin composition with excellent flame retardant characteristics, which comprises the steps:
- a) preparing a thermotropic liquid crystalline polymer which is an aromatic polyester poly(ester-amide), poly(ester-imide), poly(ester-amide-imide), or mixtures thereof, and
- b) melt blending the thermotropic liquid crystalline polymer produced in step a) with 1.0-10 weight percent of an inorganic additive selected from zeolites and titanosilicates, said weight percent of said additive being based on weight of said thermotropic liquid crystalline polymer,
- wherein:
- i) when prepared into a polymer bar thickness of 0.79 mm, burn time of said polymer bar is reduced by at least 15% less than for the same liquid crystalline polymer bar which does not contain inorgainc additive when tested according to Underwriter's Laboratories test UL-94, the tested sample having been aged before testing for 7 days at 70.degree. C., and
- ii) when said inorganic additive is a zeolite, said zeolite has a Si/Al molar ratio of 5 or less, and said composition has a flexural strength of at least 90% of the flexural strength of said thermotropic liquid crystalline polymer in the absence of said inorganic additive zeolite having a Si/Al molar ratio of 5 or less.
Parent Case Info
This application claims benefit to U.S. provisional application, Ser. No. 60/033,898 filed Dec. 20, 1996.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/US97/22905 |
12/15/1997 |
|
|
6/16/1999 |
6/16/1999 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO98/28380 |
7/2/1998 |
|
|
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5614568 |
Mawatari et al. |
Mar 1997 |
|
Foreign Referenced Citations (3)
Number |
Date |
Country |
3-205436 |
Sep 1991 |
JPX |
6-57117 |
Mar 1994 |
JPX |
10-330606 |
Dec 1998 |
JPX |