Sound insulation composition and sound insulation sheet for vehicle

Patent metadata

Field	Value
Publication number	US-10947374-B2
Application number	US-201615781304-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Dec 25, 2015
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

A sound insulation composition and a sound insulation sheet for a vehicle are provided. The sound insulation composition includes 50 to 300 parts by weight of EPDM rubber, 10 to 300 parts by weight of mica powers, 10 to 300 parts by weight of dolomite, 2 to 15 parts by weight of a vulcanizing agent, 3 to 60 parts by weight of a compatilizer, 30 to 300 parts by weight of a fire retardant, 0.2 to 3 parts by weight of a cross-linking agent, 10 to 80 parts by weight of a plasticizer, and 100 to 500 parts by weight of barium sulfate. The sound insulation sheet for the vehicle is made of the sound insulation composition mentioned above.

First claim

What is claimed is:

1. A sound insulation material composition, comprising:
50 to 300 parts by weight of EPDM rubber,
10 to 300 parts by weight of mica powers,
10 to 300 parts by weight of dolomite,
2 to 15 parts by weight of a vulcanizing agent,
3 to 60 parts by weight of a compatilizer,
30 to 300 parts by weight of a fire retardant,
0.2 to 3 parts by weight of a cross-linking agent,
10 to 80 parts by weight of a plasticizer, and
100 to 500 parts by weight of barium sulfate.

2. The sound insulation composition according to claim 1 , wherein an average particle size of the mica powers is 100 to 800 mesh.

3. The sound insulation composition according to claim 1 , wherein an average particle size of dolomite is 100 to 800 mesh.

4. The sound insulation composition according to claim 1 , wherein a weight ratio of the mica powers to the dolomite is 1:9 to 9:1.

5. The sound insulation composition according to claim 1 , wherein the plasticizer is paraffin oil.

6. The sound insulation composition according to claim 1 , further comprising 5 to 20 parts by weight of carbon black.

7. The sound insulation composition according to claim 1 , wherein the compatilizer is a maleic anhydride grafted EPDM.

8. The sound insulation composition according to claim 1 , wherein the vulcanizing agent is selected from one or more of dicumyl peroxide, bis(tert-butyl peroxy isopropyl)benzene and a 2,5-dimethyl-2,5-bis(tert-butyl peroxide) hexane.

9. The sound insulation composition according to claim 1 , wherein the cross-linking agent is selected from at least one of triallyl cyanurate and triallyl isocyanurate.

10. The sound insulation composition according to claim 1 , wherein the fire retardant is a halogen-free fire retardant.

11. The sound insulation composition according to anyone of claim 10 , wherein the halogen-free fire retardant is selected from one or more of zinc borate, magnesium hydroxide, aluminum hydroxide, red phosphorus and a smoke suppressant.

12. The sound insulation composition according to claim 1 , further comprising an additional agent.

13. The sound insulation composition according to claim 12 , wherein the additional agent is selected from one or more of a softener, an inhibitor and a lubricant.

14. A sound insulation sheet for a vehicle, wherein the sound insulation sheet is prepared by mixing, extruding, pressing and vulcanizing a sound insulation composition, and the insulation composition includes:
50 to 300 parts by weight of EPDM rubber,
10 to 300 parts by weight of mica powers,
10 to 300 parts by weight of dolomite,
2 to 15 parts by weight of a vulcanizing agent,
3 to 60 parts by weight of a compatilizer,
30 to 300 parts by weight of a fire retardant,
0.2 to 3 parts by weight of a cross-linking agent,
10 to 80 parts by weight of a plasticizer, and
100 to 500 parts by weight of barium sulfate.

15. The sound insulation sheet according to claim 14 , wherein a surface pretreatment of dolomite is carried out before mixing.

16. The sound insulation sheet according to claim 14 , wherein:
a mixing condition comprises: a mixing temperature of 100 to 120° C., and a mixing time of 10 to 30 min;
an extruding condition comprises: an extruding temperature of 90 to 110° C.; and
a vulcanizing condition comprises: a vulcanizing temperature of 150 to 170° C., and a vulcanizing time of 6 to 10 min.

Assignees

• Byd Co Ltd

Inventors

• Zhang Min
• Lin Xinping
• Sun Yaxuan
• Zhou Mingshuang
• Zhou Xiong

Classifications

• C08K2003/3045

  Sulfates · CPC title

• C08K5/0066

  Flame-proofing or flame-retarding additives · CPC title

• C08K13/06

  Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00 · CPC title

• C08L51/06

  grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title

• C08K2003/385

  Binary compounds of nitrogen with boron · CPC title