Patent EP0128636A1 successfully refreshed from Google Patents.
EP0128636A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Preparation of elastomers by reaction injection moulding
Assignee: Texaco Development Corp
•
Filing: 1984-03-28
•
Granted: —
•
Expires: 2004-03-28
Abstract
Abstract Deterioration in properties of reaction injection moulded (RIM) elastomers, arising from lack of adhesion between fillers and elastomers obtained by reacting an aromatic polyisocyanate, a high molecular weight active-hydrogen compound, and a chain extender, can be overcome by using epoxy-modified filler materials, such as epoxy-modified milled glass, flaked glass, mica or Wollastonite.
Inventors
- 👤 Richard Gilbert Dominguez
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 21:44
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04; 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; C08K5/04; C08K5/15; C08K5/54; C08K9/06; C08G2120/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
A method for making a RIM elastomer article by reacting, in a closed mould, an aromatic polyisocyanate, a high molecular weight compound having Zerewitinov-active hydrogen atoms, and a chain extender, in the presence of a filler, characterized in that the filler is an epoxy-modified filler.
Claim 2
Independent Claim
45 words
A method for making a RIM elastomer article by reacting, in a closed mould, an aromatic polyisocyanate, a high molecular weight compound having Zerewitinov-active hydrogen atoms, and a chain extender, in the presence of a filler, characterized in that the filler is an epoxy-modified filler.
Claim 3
Dependent Claim
41 words
A method according to claim 1 characterized in that the active hydrogen compound is an amine-terminated polyether having an average molecular weight of greater than 1,500 and having more than 50% of its active hydrogen in the form of amine hydrogens.
Claim 4
Dependent Claim
21 words
A method according to claim 2 characterized in that the amine-terminated polyether has an average molecular weight of at least 2,500.
Claim 5
Dependent Claim
22 words
A method according to claim 2 or 3 characterized in that the amine terminated polyether has a functionality from 2 to 3.
Claim 6
Independent Claim
31 words
A method according to any one of claims 2 to 4 characterized in that the amine-terminated polyether is an aminated polyoxypropylene triol having an average molecular weight of at least 5,000.
Claim 7
Dependent Claim
25 words
A method according to claim 1 characterized in that the active hydrogen compound is a polyether polyol having an equivalent weight of at least 500.
Claim 8
Independent Claim
18 words
A method according to any preceding claim characterized in that the epoxy modified filler material is glass based.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.