CA1077352A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Coating and bonding method particularly for sole attaching
Assignee: USM Corp
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Filing: 1976-02-03
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Granted: 1980-05-13
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Expires: 1996-02-03
Abstract
Abstract Abstract This is a method for coating or adhesively bonding surface, particularly for bonding tread members to shoe uppers, in which urethane polymeric material containing reactive -NCO groups and having crystalline segments in the polymer molecule is applied in fluid condition for wetting engagement with a surface and is converted through reaction to tough solid but still heat softenable condition. The coated surface in heat softened condition may be pressed against a surface to which it is to be bonded to form an adhesive joint, and the joint cooled to give a strong adhesive union between the surfaces.
Inventors
- 👤 Conrad Rossitto
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-27 08:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; A; A43; A43D; A43D25/00; A43D25/047; A43D25/053; C09; C09J; C09J175/00; C09J175/04; C09J5/00; C09J5/06; C08G2170/00; C08G2170/20; C08G2170/90; C08G2250/00; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
199 words
The method comprising the steps of bringing a normally solid polymeric urethane to fluid form, applying said urethane as a coating to a surface of an article, said urethane containing reactive -NCO groups and comprising segments having a crystalline melting point of from about 40°C to about 90°C, the reactive -NCO groups in said urethane being in proportions to form after chain extension polymeric polyurethane which is viscoelastic when heated above said crystalline melting point, solidifying and crystallizing the urethane of said coating, thereafter bringing a compound providing active hydrogens into contact with said urethane coating at temperatures at which the solidified urethane coating is not distorted and reacting said compound with said -NCO groups to chain extend said polymeric urethane, heating said chain extended polyurethane to a tempera-ture above its crystalline melting point to bring it to heat softened viscoelastic condition, pressing said heat softened viscoelastic chain-extended polyurethane against a coating of heat activatable adhesive compatible with said chain-extended polyurethane on the attaching surface of a second article, said heat activatable adhesive comprising a polyurethane having reactive -NCO groups and thereafter cooling said chain-extended polyurethane to tough strong condition bonding said second article to said first mentioned article.
Claim 2
Independent Claim
199 words
The method comprising the steps of bringing a normally solid polymeric urethane to fluid form, applying said urethane as a coating to a surface of an article, said urethane containing reactive -NCO groups and comprising segments having a crystalline melting point of from about 40°C to about 90°C, the reactive -NCO groups in said urethane being in proportions to form after chain extension polymeric polyurethane which is viscoelastic when heated above said crystalline melting point, solidifying and crystallizing the urethane of said coating, thereafter bringing a compound providing active hydrogens into contact with said urethane coating at temperatures at which the solidified urethane coating is not distorted and reacting said compound with said -NCO groups to chain extend said polymeric urethane, heating said chain extended polyurethane to a tempera-ture above its crystalline melting point to bring it to heat softened viscoelastic condition, pressing said heat softened viscoelastic chain-extended polyurethane against a coating of heat activatable adhesive compatible with said chain-extended polyurethane on the attaching surface of a second article, said heat activatable adhesive comprising a polyurethane having reactive -NCO groups and thereafter cooling said chain-extended polyurethane to tough strong condition bonding said second article to said first mentioned article.
Claim 3
Dependent Claim
76 words
The method as defined in claim 1 in which said polymeric urethane is an -NCO terminated prepolymer from reaction of a diisocyanate and a polymeric polyol in proportions to give a ratio of -NCO to -OH in the range of from about 1.25:1 to about 3.0:1, said prepolymer having a molecular weight in the range of from about 1,000 to about 10,000 and said chain-extension is effected at temperatures of from about 90°F to about 190°F.
Claim 4
Dependent Claim
31 words
The method as defined in claim 2 in which said polyurethane is brought to fluid form for application as a coating by heating to a temperature above its crystalline melting point.
Claim 5
Dependent Claim
29 words
The method as defined in claim 2 in which said prepolymer is brought to fluid state for application as a coat-ing by dissolving it in a volatile organic solvent.
Claim 6
Dependent Claim
99 words
The method as defined in claim 2 in which polymeric polyol is a hydroxyl terminated polyester from the group consisting of polycaprolactones and aliphatic polyester of dicarboxylic acids having from 6 to 12 carbon atoms and glycols having from 2 to 6 carbon atoms, said polyol having a molecular weight of from about 2,000 to about 4,000 and a crystalline melting point of from about 40°C to about 60°C and in which the diisocyanate and the polyol are reacted in proportions to give a ratio of -NCO to -OH in the range of from about 1.5:1 to about 2.5:1.
Claim 7
Dependent Claim
37 words
The method as defined in claim 1 in which said compound containing active hydrogen is water and is in the form of vapor or steam when brought in contact with said polymeric urethane to effect chain extension.
Claim 8
Dependent Claim
61 words
The method as defined in claim 6 in which said polymeric urethane is an -NCO terminated prepolymer from reaction of a diisocyanate and a polymeric polyol in proportions to give a ratio of -NCO to -OH in the range of from about 1.25:1 to about 3.0:1, said prepolymer having a molecular weight in the range of from 1,000 to about 10,000.
References Cited (Backward Citations)
No citation records indexed.
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