Rubber compound microwave curing method

Patent metadata

Field	Value
Publication number	US-9399685-B2
Application number	US-201214125757-A
Country	US
Kind code	B2
Filing date	Jun 15, 2012
Priority date	Jun 15, 2011
Publication date	Jul 26, 2016
Grant date	Jul 26, 2016

Abstract

A method of curing a compound having a cross-linkable, unsaturated-chain polymer base and a curing system; the method employing microwaves as a form of energy to promote curing reactions; and the curing system including compounds of general formula (I) ([R 1 R 2 R 3 NR 5 (NR 4 R 6 R 7 ) n ] (n+1)+ )y(n+1)X y− (I) where: X is an atom or anionic group; R 1 , R 2 , R 3 , which are the same or different, are each C m H 2m+1 , where m is 1 to 3, or CH 2 CHCH 2 or CHCHCH 3 , R 4 , R 6 , R 7 , which are the same or different, are each CH 2 CHCH 2 or CHCHCH 3 ; n is 0 or 1; y is 1 when n is 1; y is 1 or 2 when n is 0; R 5 is an aliphatic group C 15 -C 22 when n is 0; is an aliphatic group C 8 -C 16 when n is 1; when n is 0, at least one of R 1 , R 2 , R 3 , R 5 has a double bond.

First claim

The invention claimed is:

1. A method of curing a compound comprising a cross-linkable, unsaturated-chain polymer base and a curing system; said method being characterized by comprising a curing step wherein the compound is cured by using microwaves as a form of energy to promote curing reactions; and in that said curing system comprises compounds of general formula (I)
([R 1 R 2 R 3 NR 5 (NR 4 R 6 R 7 )n] (n+1)+ ) y ( n+ 1)X y−   (I)

where:
X is an atom or anionic group;
R 1 , R 2 , R 3 , which are the same or different, are each C m H 2m+1 , where m is 1 to 3, or CH 2 CHCH 2 or CHCHCH 3 ;
R 4 , R 6 , R 7 , which are the same or different, are each CH 2 CHCH 2 or CHCHCH 3 ;
n is 0 or 1;
y is 1 when n is 1; y is 1 or 2 when n is 0;
R 5 is an aliphatic group C 15 -C 22 when n is 0; is an aliphatic group C 8 -C 16 when n is 1;
when n is 0, at least one of R 1 , R 2 , R 3 , R 5 comprises a double bond.

2. A rubber compound curing method as claimed in claim 1 , characterized in that said compounds of general formula (I) are curing accelerants.

3. A rubber compound curing method as claimed in claim 1 , characterized in that R 1 , R 2 , R 3 are CH 2 CHCH 2 .

4. A rubber compound curing method as claimed in claim 3 , characterized in that n is 1, and R 5 is a saturated aliphatic group.

5. A rubber compound curing method as claimed in claim 1 , characterized in that R 5 comprises a double bond, and n is 0.

6. A rubber compound curing method as claimed in claim 1 , characterized in that the compounds of general formula (I) are in the group comprising:
[(CH 3 ) 3 N(CH 2 ) 8 CHCH(CH 2 ) 7 CH 3 ] + X − ;
[(CH 2 CHCH 2 ) 3 N(CH 2 ) 15 CH 3 ] + X − ;
[(CH 3 )(CH 2 CHCH 2 ) 2 N(CH 2 ) 15 CH 3 ] + X − ;
[(CH 2 CHCH 2 )(CH 3 ) 2 N(CH 2 ) 15 CH 3 ] + X − ; and
[(CH 2 CHCH 2 ) 3 N(CH 2 ) 12 N(CH 2 CHCH 2 ) 3 ] 2 + 2X − .

7. A rubber compound curing method as claimed in claim 1 , characterized in that X − is I − or Br − .

Assignees

• Grenci Valeria
• Cotugno Salvatore
• Bridgestone Corp

Inventors

• Grenci Valeria
• Cotugno Salvatore

Classifications

• C08J3/24 Primary

  Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K) · CPC title

• C08K5/19

  Quaternary ammonium compounds · CPC title

• B29C2035/0855

  using microwave · CPC title

• C08L21/00

  Compositions of unspecified rubbers · CPC title

• C08J3/28

  Treatment by wave energy or particle radiation · CPC title