US4740575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpolymer composition comprising a functional polysiloxane, an isocyanate and a mono-carboxylic acid or salt thereof
Assignee: Lyondell Chemical Technology LP
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Filing: 1987-05-04
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Granted: 1988-04-26
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Expires: 2007-05-04
Abstract
Abstract An improvement is provided in the compression molding of lignocellulosic composite articles, such as particle or flake board, in which polyisocyanate binder systems are employed, the improvement being the provision of a novel functional polysiloxane-hydroxyle substituted mono-carboxylic acid or metal salt-isocyanate terpolymer as a release agent on the mold surface or surfaces to give multiple release. Optionally, organopolysiloxane fluids may be employed along with the terpolymer release agent as a diluent.
Inventors
- 👤 Tinh Nguyen
- 👤 James M. Gaul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:38
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/61; C08G18/64; C08G18/6492; C08L; C08L97/00; C08L97/02; B29K; B29K2503/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
178 words
A terpolymer polysiloxane composition, useful as a release agent for lignocellulosic composite molded articles containing an organic polyisocyanate based binder, which comprises the terpolymeric reaction product of a functional polysiloxane having the formula: ##STR9## wherein n is an integer of from 5 to 30, m is an integer of from 1 to 20 and X is a group selected from --CH 2 OH, ##STR10## --COOH or --OH with a hydroxyl substituted monocarboxylic acid or metal salt thereof having the formula (CH 3 --(CH 2 ) y --COO) r --Z wherein Y is an integer of from 5 to 24, r is an integer of from 1 to 3 and Z is a group selected from Hydrogen, Na, Li, Ca, Ba, Cd, Mg, K or Fe, and an isocyanate having the formula R--NCO wherein R is a group selected from --CH 2 (CH 2 ) Y NCO, CH 3 --(CH 2 ) Y --, ##STR11## R1 being hydrogen or an alkyl groupn having from 1 to 6 carbon atoms and Y is an integer of from 1 to 20.
Claim 2
Dependent Claim
178 words
A terpolymer polysiloxane composition, useful as a release agent for lignocellulosic composite molded articles containing an organic polyisocyanate based binder, which comprises the terpolymeric reaction product of a functional polysiloxane having the formula: ##STR9## wherein n is an integer of from 5 to 30, m is an integer of from 1 to 20 and X is a group selected from --CH 2 OH, ##STR10## --COOH or --OH with a hydroxyl substituted monocarboxylic acid or metal salt thereof having the formula (CH 3 --(CH 2 ) y --COO) r --Z wherein Y is an integer of from 5 to 24, r is an integer of from 1 to 3 and Z is a group selected from Hydrogen, Na, Li, Ca, Ba, Cd, Mg, K or Fe, and an isocyanate having the formula R--NCO wherein R is a group selected from --CH 2 (CH 2 ) Y NCO, CH 3 --(CH 2 ) Y --, ##STR11## R1 being hydrogen or an alkyl groupn having from 1 to 6 carbon atoms and Y is an integer of from 1 to 20.
Claim 3
Dependent Claim
15 words
A composition according to claim 1 wherein the functional polysiloxane is --CH 2 OH terminated.
Claim 4
Dependent Claim
13 words
A composition according to claim 1 wherein the functional polysiloxane is ##STR12## terminated.
Claim 5
Dependent Claim
13 words
A composition according to claim 1 wherein the functional polysiloxane is --COOH terminated.
Claim 6
Dependent Claim
19 words
A composition according to claim 1 wherein the hydroxyl substituted monocarboxylic acid of the terpolymer is 12-hydroxy stearic acid.
Claim 7
Dependent Claim
140 words
A terpolymeric polysiloxane composition, useful as a release agent for lignocellulosic composite molded articles containing an organic polyisocyanate based binder, which comprises the terpolymeric reaction product of a functional polysiloxane having the formula: ##STR13## wherein n is an integer of from 5 to 30, m is an integer of from 1 to 20 and X is a group selected from --CH 2 OH, ##STR14## --COOH or --OH with a hydroxyl substituted monocarboxylic acid or metal salt thereof having the formula (CH 3 --(CH 2 ) Y --COO) r --Z wherein Y is an integer of from 5 to 24, r is an integer of from 1 to 3 and Z is a group selected from Hydrogen, Na, Li, Ca, Ba, Cd, Mg, K or Fe, and a polymethylene polyphenyl polyisocyanate containing from 20 to 85 percent by weight diphenylmethane diisocyanate.
Claim 8
Dependent Claim
140 words
A terpolymeric polysiloxane composition, useful as a release agent for lignocellulosic composite molded articles containing an organic polyisocyanate based binder, which comprises the terpolymeric reaction product of a functional polysiloxane having the formula: ##STR13## wherein n is an integer of from 5 to 30, m is an integer of from 1 to 20 and X is a group selected from --CH 2 OH, ##STR14## --COOH or --OH with a hydroxyl substituted monocarboxylic acid or metal salt thereof having the formula (CH 3 --(CH 2 ) Y --COO) r --Z wherein Y is an integer of from 5 to 24, r is an integer of from 1 to 3 and Z is a group selected from Hydrogen, Na, Li, Ca, Ba, Cd, Mg, K or Fe, and a polymethylene polyphenyl polyisocyanate containing from 20 to 85 percent by weight diphenylmethane diisocyanate.
Claim 9
Dependent Claim
15 words
A composition according to claim 1 wherein the isocyanate of the terpolymer is hexamethylene diisocyanate.
Claim 10
Dependent Claim
14 words
A composition according to claim 1 wherein the isocyanate of the terpolymer is phenylisocyanate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |