EP0175447A1
Expired / Lapsed
EP
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Process for the production of reaction injection molded elastomers
Assignee: Texaco Development Corp
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Filing: 1985-07-02
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Granted: —
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Expires: 2005-07-02
Abstract
Abstract The tensile strength of RIM elastomers obtained from aromatic polyisocyanates, polyether polyols, chain extenders and fillers (e.g. glass-based fillers) can be enhanced by incorporating an epoxysilane coupling agent, e.g. wherein R' is an epoxidic group and X is a hydrolyzable group.
Inventors
- 👤 Richard Joseph Gilbert Dominquez
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 12:53
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/40; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6685; C08K5/00; C08K5/54; C08K5/541; C08K5/5435
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
50 words
A reaction injection molded elastomer made by reacting an aromatic polyisocyanate in a closed mold with a polyether polyol having an equivalent weight of at least 500, a chain extender and a filler, characterized in that an epoxy silane coupling agent is employed as well as an untreated filler material.
Claim 2
Dependent Claim
50 words
A reaction injection molded elastomer made by reacting an aromatic polyisocyanate in a closed mold with a polyether polyol having an equivalent weight of at least 500, a chain extender and a filler, characterized in that an epoxy silane coupling agent is employed as well as an untreated filler material.
Claim 3
Dependent Claim
40 words
An elastomer according to Claim 1, characterized in that the polyether polyol is an amine terminated polyether having an average molecular weight of at least 1,500 and more than 50% of its active hydrogen in the form of amine hydrogen.
Claim 4
Dependent Claim
17 words
An elastomer according to Claim 1 or 2 characterized in that the filler material is glass based.
Claim 5
Dependent Claim
22 words
An elastomer according to any preceding Claim, characterized in that the filler is glass fibre, milled glass, flaked glass, mica or Wollastonite.
Claim 6
Dependent Claim
16 words
An elastomer according to any preceding Claim, characterized in that the chain extender is diethyltoluene diamine.
Claim 7
Dependent Claim
15 words
An elastomer according to any preceding Claim, characterized in that the polyisocyanate is a quasi-prepolymer.
Claim 8
Dependent Claim
33 words
An elastomer according to any of Claims 2 to 6, characterized in that the" amine terminated polyether has a molecular weight of at least 2,500 and a functionality of from 2 to 3.
Claim 9
Dependent Claim
21 words
An elastomer according to Claim 7, characterized in that the amine terminated polyether has a molecular weight of at least 5,000.
Claim 10
Dependent Claim
29 words
An elastomer according to any preceding Claim, characterized in that the epoxysilane coupling agent has the formula wherein R' is an epoxidic group and X is a hydrolyzable group.
Claim 11
Dependent Claim
22 words
An elastomer according to any preceding Claim characterized in that the filler is pretreated with an epoxy, amine or isocyanate sizing agent.
References Cited (Backward Citations)
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