US4742144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymeric composition of a functional polysiloxane and a carboxylic acid or salt thereof
Assignee: Lyondell Chemical Technology LP
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Filing: 1987-05-15
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Granted: 1988-05-03
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Expires: 2007-05-15
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 copolymeric reaction product of a functional polysiloxane and a monocarboxylic acid or metal salt thereof as release agent on the mold surfaces to give multiple release. Optionally organopolysiloxane fluid may be employed along with the copolymer as diluent.
Inventors
- 👤 Tinh Nguyen
- 👤 James M. Gaul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:10
CPC Classifications
C; C08; C08L; C08L75/00; B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484; C08G77/00; C08G77/04; C08G77/38; C08L97/00; C08L97/02; B29K; B29K2503/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
A Copolymeric polysiloxane composition, useful as a release agent for lignocellulosic composite molded articles containing an organic polyisocyanate based binder, comprising the copolymeric reaction product of a functional polysiloxane having the formula: ##STR6## 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 ##STR7## and a 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.
Claim 2
Dependent Claim
116 words
A Copolymeric polysiloxane composition, useful as a release agent for lignocellulosic composite molded articles containing an organic polyisocyanate based binder, comprising the copolymeric reaction product of a functional polysiloxane having the formula: ##STR6## 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 ##STR7## and a 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.
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 ##STR8## terminated.
Claim 5
Dependent Claim
13 words
A composition according to claim 1 wherein the functional polysiloxane is --COOH terminated.
Claim 6
Dependent Claim
16 words
A composition according to claim 1 wherein the monocarboxylic acid of the copolymer is palmitic acid.
Claim 7
Dependent Claim
14 words
A composition according to claim 1 wherein the monocarboxylic acid salt is calcium stearate.
Claim 8
Dependent Claim
14 words
A composition according to claim 1 wherein the monocarboxylic acid salt is iron stearate.
Claim 9
Dependent Claim
14 words
A composition according to claim 1 wherein the monocarboxylic acid salt is potassium oleate.
Claim 10
Dependent Claim
16 words
A composition according to claim 1 wherein the monocarboxylic acid of the copolymer is stearic acid.
Claim 11
Dependent Claim
77 words
A copolymeric polysiloxane composition, useful as a release agent for lignocellulosic composite molded articles containing an organic polyisocyanate binder, comprising the copolymeric 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 ##STR10## and 12-hydroxy stearic acid or a Na, Li, Ca, Ba, Cd, Mg, K or Fe metal salt thereof.
Claim 12
Dependent Claim
77 words
A copolymeric polysiloxane composition, useful as a release agent for lignocellulosic composite molded articles containing an organic polyisocyanate binder, comprising the copolymeric 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 ##STR10## and 12-hydroxy stearic acid or a Na, Li, Ca, Ba, Cd, Mg, K or Fe metal salt thereof.
References Cited (Backward Citations)
US4220727A
Cited
US4452962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |