EP0052958A2
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EP
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Modified polyurethane liquid polymer compositions and their preparation
Assignee: Olin Corp
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Filing: 1981-10-30
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Granted: —
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Expires: 2001-10-30
Abstract
Abstract A novel heat-curable liquid polymer composition comprises a modified urethane oligomer containing terminal ethylenic unsaturation and a free radical catalyst. It is prepared by heating a mixture of the oligomer and the catalyst. In a preferred embodiment, the polymer composition further includes a reinforcing agent and/or a filler; the cured composition demonstrates enhanced impact properties and is particularly useful in automotive body constructions. The urethane oligomer has an equivalent ratio of NCO to OH from 0.5:1 to 2:1 and has been prepared by reacting (a) an isocyanate-terminated prepolymer having a final free NCO content ranging from 0.5% to 30% and that is the product of reacting an organic polyisocyanate with an isocyanate-reactive-group-containing unsaturated acrylate and/or unsaturated amide monomer, with (b) a polyol having an average equivalent weight in the range 75 to 500 and an average functionality of at least about 3.
Inventors
- 👤 James Michael O'connor
- 👤 Donald Lee Lickei
- 👤 Michael Lee Rosin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 23:50
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/81; C08G18/8141; C08G18/815; C08G18/8158; C08F; C08F299/00; C08F299/02; C08F299/06; C08F299/065; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; C08G18/4829; Y; Y10; Y10S; Y10S525/00; Y10S525/92
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
97 words
A polyurethane liquid polymer composition comprising a urethane oligomer and a heat-activated free-radical-generating catalyst, characterized in that the urethane oligomer has an equivalent ratio of NCO to OH from 0.5:1 to 2:1 and has been prepared by reacting (a) an isocyanate-terminated prepolymer having a final free NCO content ranging from 0.5% to 30% and that is the product of reacting an organic polyisocyanate with an isocyanate/ reactive-group-containing unsaturated acrylate and/or unsaturated amide monomer, with (b) a polyol having an average equivalent weight in the range 75 to 500 and an average functionality of at least about 3.
Claim 2
Dependent Claim
97 words
A polyurethane liquid polymer composition comprising a urethane oligomer and a heat-activated free-radical-generating catalyst, characterized in that the urethane oligomer has an equivalent ratio of NCO to OH from 0.5:1 to 2:1 and has been prepared by reacting (a) an isocyanate-terminated prepolymer having a final free NCO content ranging from 0.5% to 30% and that is the product of reacting an organic polyisocyanate with an isocyanate/ reactive-group-containing unsaturated acrylate and/or unsaturated amide monomer, with (b) a polyol having an average equivalent weight in the range 75 to 500 and an average functionality of at least about 3.
Claim 3
Dependent Claim
17 words
A composition according to Claim 1, including at least one reinforcing agent and/or at least one filler.
Claim 4
Dependent Claim
27 words
A composition according to Claim 2, in which from 20 to 400 parts by weight of filler is included per 100 parts by weight of urethane oligomer.
Claim 5
Dependent Claim
31 words
' A composition according to Claim 2 or 3, in which from 10 to 150 parts by weight of reinforcing agent is included per 100 parts by weight of urethane oligomer.
Claim 6
Dependent Claim
17 words
A composition according to any one of Claims 1 to 4, including a copolymerizable solvent, preferably styrene.
Claim 7
Dependent Claim
28 words
A composition according to any one of Claims 1 to 5, in which the urethane oligomer has an equivalent ratio of NCO to OH from 0.7:1 to 1.5:1.
Claim 8
Dependent Claim
38 words
A composition according to Claim 6, in which the isocyanate-terminated prepolymer has a final free NCO content ranging from 10% to 20%, and the urethane oligomer has an equivalent ratio of NCO to OH from 0.8:1 to 1.2:1.
Claim 9
Dependent Claim
30 words
A composition according to any one of Claims 1 to 7, in which the unsaturated monomer is hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate, hydroxyethyl acrylamide, t-butylaminoethyl methacrylate or N-(isobutoxymethyl) acrylamide.
Claim 10
Dependent Claim
29 words
A composition according to any one of Claims 1 to 8, in which the catalyst is a peroxide catalyst, preferably t-butyl perbenzoate or t-butyl peroctoate or a mixture thereof.
Claim 11
Dependent Claim
51 words
A composition according to Claim 1, in which the polyol has an average equivalent weight in the range 100 to 200 and has been prepared by reacting (a) a mixture of sucrose and/or dextrose with an aliphatic triol with (b) propylene oxide or a mixture of propylene oxide with ethylene oxide.
Claim 12
Dependent Claim
28 words
A composition according to any one of Claims 1 to 10, in which urethane oligomer further comprises a chain-extending agent, preferably 2-etbyl-l,3-hexane diol, dipropylene glycol or tripropylene glycol.
Claim 13
Dependent Claim
20 words
A composition according to any one of Claims 1 to 11, in which the said organic polyisocyanate is toluene diisocyanate.
Claim 14
Dependent Claim
62 words
A process for preparing a polyurethane polymer product comprising mixing a urethane oligomer and a heat-activated free-radical-generating catalyst, and then heating the resulting mixture at a temperature adequate to activate the catalyst and cure the mixture, the urethane oligomer having an equivalent ratio of NCO to OH from 0.5:1 to 2:1 and having been prepared in the manner defined in Claim 1.
Claim 15
Dependent Claim
54 words
A process according to Claim 13, in which the polyol has an average equivalent weight in the range 100 to 200, the isocyanate-terminated prepolymer has a final free NCO content in the range 10% to 20%, and the urethane oligomer has an equivalent ratio of NCO to OH in the range 0.8:1 to 1.2:1.
Claim 16
Dependent Claim
18 words
A process according to Claim 13 or 14, in which the urethane oligomer further comprises a chain-extending agent.
Claim 17
Dependent Claim
40 words
A process according to Claims 13,. 14 or 15, in which the urethane oligomer and the said catalyst are also mixed with a reinforcing agent and/or a filler to a homogeneous blend before the mixture is heated to cure it.
References Cited (Backward Citations)
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