US5019544A
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Discrete tungsten complexes as oxygen and water resistant DCPD polymerization catalysts
Assignee: Metton America Inc
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Filing: 1990-08-09
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Granted: 1991-05-28
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Expires: 2010-08-09
Abstract
Abstract This invention is a process for preparing a polymer which comprises contacting pure dicyclopentadiene with a pure tungsten catalyst complex, such as WCl 3 (2,6-diisopropylphenoxy) 3 , when tributyl tin hydride or triphenyl tin hydride is used as the activator for the polymerization. This process affords a method of polymerization of dicyclopentadiene in which the mixture gels slowly without the use of a rate moderator at 80° C. (in from about 15 seconds to as much as two minutes or more) and furthermore cures quite slowly (in about 3-6 minutes). This delay makes these compositions particularly applicable to reaction injection molding processes. Moreover, both the tungsten complexes and the tin activator compounds employed in this invention are relatively insensitive to oxygen and water.
Inventors
- 👤 Andrew Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:37
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; B; B01; B01J; B01J31/00; B01J31/02; B01J31/0201; B01J31/0211; B01J31/0214; B01J31/12; B01J31/122; B01J2531/00; B01J2531/60; B01J2531/66; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/26; B01J31/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
A catalyst composition for the preparation of a polymer of a strained ring non-conjugated polycyclic cycloolefin monomer which comprises a tungsten catalyst compound having the formula ##STR8## wherein X is Cl or Br, n is 2 or 3, R 1 is a H, Cl an alkyl group having 1 to 10 carbons, an alkoxy group having 1 to 8 carbons or a phenyl group, R 2 is H or an alkyl group having 1 to 9 carbons and R 3 is a H or an alkyl group having 1 to 10 carbon atoms and an activator compound having the formula SnR 3 H wherein R is selected from the group consisting of a phenyl group and an alkyl group having 1 to 10 carbon atoms.
Claim 2
Dependent Claim
125 words
A catalyst composition for the preparation of a polymer of a strained ring non-conjugated polycyclic cycloolefin monomer which comprises a tungsten catalyst compound having the formula ##STR8## wherein X is Cl or Br, n is 2 or 3, R 1 is a H, Cl an alkyl group having 1 to 10 carbons, an alkoxy group having 1 to 8 carbons or a phenyl group, R 2 is H or an alkyl group having 1 to 9 carbons and R 3 is a H or an alkyl group having 1 to 10 carbon atoms and an activator compound having the formula SnR 3 H wherein R is selected from the group consisting of a phenyl group and an alkyl group having 1 to 10 carbon atoms.
Claim 3
Dependent Claim
88 words
The catalyst composition of claim 1 wherein said tungsten catalyst complex is selected from the group consisting of WCl 2 (4-ethoxyphenoxy) 4 , WCl 2 (4-butoxyphenoxy) 4 , WCl 3 (2,6-di-tert-butylphenoxy) 3 , WCl 2 (phenoxy) 4 , WCl 2 (3-methylphenoxy) 4 , WCl 2 (4-methylphenoxy), WCl 2 (3,5-dimethylphenoxy) 4 , WCl 2 (4-butylphenoxy) 4 , WCl 2 (4-chlorophenoxy) 4 , WCl 3 (2,6-dimethyl phenoxy) 3 , WCl 3 (2,4,6-trimethylphenoxy) 3 , WCl 2 (4-phenyl phenoxy) 4 WCl 2 (4-methoxyphenoxy) 4 , and WCl 3 (2,6-di-isopropylphenoxy) 3 .
Claim 4
Dependent Claim
24 words
The catalyst composition of claim 1 wherein the tin compound is selected from the group consisting of tri-n-butyl tin hydride and triphenyl tin hydride.
Claim 5
Dependent Claim
22 words
The composition of claim 1 wherein said tungsten catalyst complex and said activator compound are stable when exposed to oxygen or water.
References Cited (Backward Citations)
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