US5370930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated polyester film
Assignee: Mitsubishi Chemical Corp
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Filing: 1992-11-06
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Granted: 1994-12-06
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Expires: 2012-11-06
Abstract
Abstract A polyester film having a coating layer provided with excellent mold release property, slipperiness, heat resistance and flatness is disclosed. The laminated polyester film is prepared by applying at least on one surface of a polyester film an aqueous solution or dispersion containing a polysiloxane-polyvinyl graft copolymer which comprises a silane comprising structural units of the formulas (1) and (2) indicated below or the hydrolysate thereof and in which not less than 80 wt % of the siloxane portions are dimethylsiloxane, and, thereafter, stretching and drying. R1nSiO(4-n)/2(1) R2mSiO(3-m)/2-A-B(2) wherein R1 and R2 are respectively and independently an unsubstituted or substituted hydrocarbyl group which has a carbon atom directly connected to the Si atom and has no radical polymerizability; n is 1 or 2 and when n is 2 R1's may be different groups; m is 0 or 1; A is a divalent organic group which has a carbon directly connected to the Si atom and is connected to the group B; and B is a vinyl copolymer block obtained by grafting at least one selected from an aromatic vinyl monomer and an alkyl ester of acrylic or methacrylic acid.
Inventors
- 👤 Yoshihiko Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:17
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; C08J7/043; C08J7/044; C08J7/046; C08J7/056; C08J2367/00; C08J2367/02; C08J2483/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
208 words
A coated polymer film comprising (A) a polyester film, and on at least one surface of said film, (B) a coating of a polysiloxane-polyvinyl graft copolymer, wherein the polysiloxane portion of said polysiloxane-polyvinyl graft copolymer comprises structural units of the formulas (1), (2) and (3) R.sup.1.sub.n SiO.sub.(4-n)/2 ( 1) R.sup.2.sub.m SiO.sub.(3-m)/2 --A--B (2) (CH.sub.3).sub.2 SiO.sub.2/2 ( 3) and in which the structural units of formula (3) are present in an amount of not less than 80 wt % of the polysiloxane portion, wherein the thickness of said coating on said film is 0.005-3 μm; and wherein R 1 and R 2 are independently an unsubstituted or substituted hydrocarbyl group wherein said hydrocarbyl group has a carbon atom directly connected to the Si atom and has no radical polymerizability; n is 1 or 2, and when n is 2, the R 1 groups are identical or non-identical; m is 0 or 1; A is a divalent organic group which has a carbon directly connected to the Si atom and is connected to the group B; and B is a vinyl polymer block obtained by grafting at least one monomer selected from the group consisting of aromatic vinyl monomers, alkyl esters of acrylic acid and alkyl esters of methacrylic acid.
Claim 2
Dependent Claim
208 words
A coated polymer film comprising (A) a polyester film, and on at least one surface of said film, (B) a coating of a polysiloxane-polyvinyl graft copolymer, wherein the polysiloxane portion of said polysiloxane-polyvinyl graft copolymer comprises structural units of the formulas (1), (2) and (3) R.sup.1.sub.n SiO.sub.(4-n)/2 ( 1) R.sup.2.sub.m SiO.sub.(3-m)/2 --A--B (2) (CH.sub.3).sub.2 SiO.sub.2/2 ( 3) and in which the structural units of formula (3) are present in an amount of not less than 80 wt % of the polysiloxane portion, wherein the thickness of said coating on said film is 0.005-3 μm; and wherein R 1 and R 2 are independently an unsubstituted or substituted hydrocarbyl group wherein said hydrocarbyl group has a carbon atom directly connected to the Si atom and has no radical polymerizability; n is 1 or 2, and when n is 2, the R 1 groups are identical or non-identical; m is 0 or 1; A is a divalent organic group which has a carbon directly connected to the Si atom and is connected to the group B; and B is a vinyl polymer block obtained by grafting at least one monomer selected from the group consisting of aromatic vinyl monomers, alkyl esters of acrylic acid and alkyl esters of methacrylic acid.
Claim 3
Dependent Claim
18 words
The polyester film of claim 1, wherein the thickness of said coating on said film is 0.005-2.0 μm.
Claim 4
Dependent Claim
18 words
The polyester film of claim 1, wherein the thickness of said coating on said film is 0.005-1.0 μm.
Claim 5
Dependent Claim
18 words
The polyester film of claim 1, wherein the thickness of said coating on said film is 0.010-1.0 μm.
Claim 6
Dependent Claim
29 words
The polyester film of claim 1, wherein the ratio of the polysiloxane portion to the vinyl polymer portion is in the range of from 100:5 to 100:1000 by weight.
Claim 7
Dependent Claim
29 words
The polyester film of claim 1, wherein the ratio of the polysiloxane portion to the vinyl polymer portion is in the range of from 100:5 to 100:500 by weight.
Claim 8
Dependent Claim
29 words
The polyester film of claim 1, wherein the structural units of formula (3) are present in an amount of not less than 85 wt % of the polysiloxane portion.
Claim 9
Dependent Claim
29 words
The polyester film of claim 1, wherein the structural units of formula (3) are present in an amount of not less than 90 wt % of the polysiloxane portion.
Claim 10
Dependent Claim
226 words
A coated polyester film prepared by the process of (A) applying, to at least one surface of a polyester film, an aqueous solution or dispersion containing a polysiloxane-polyvinyl graft copolymer, so as to form a coating on said film, wherein the polysiloxane portion of said polysiloxane-polyvinyl graft copolymer comprises structural units of the formulas (1), (2) and (3) R.sup.1.sub.n SiO.sub.(4-n)/2 ( 1) R.sup.2.sub.m SiO.sub.(3-m)/2 --A--B (2) (CH.sub.3).sub.2 SiO.sub.2/2 ( 3) and in which the structural units of formula (3) are present in an amount of not less than 80 wt % of the polysiloxane portion, and, thereafter, (B) stretching and drying said film so that the thickness of said coating is 0.005-3 μm; wherein R 1 and R 2 are independently an unsubstituted or substituted hydrocarbyl group wherein said hydrocarbyl group has a carbon atom directly connected to the Si atom and has no radical polymerizability; n is 1 or 2, and when n is 2, the R 1 groups are identical or non-identical; m is 0 or 1; A is a divalent organic group which has a carbon directly connected to the Si atom and is connected to the group B; and B is a vinyl polymer block obtained by grafting at least one monomer selected from the group consisting of aromatic vinyl monomers, alkyl esters of acrylic acid and alkyl esters of methacrylic acid.
Claim 11
Dependent Claim
226 words
A coated polyester film prepared by the process of (A) applying, to at least one surface of a polyester film, an aqueous solution or dispersion containing a polysiloxane-polyvinyl graft copolymer, so as to form a coating on said film, wherein the polysiloxane portion of said polysiloxane-polyvinyl graft copolymer comprises structural units of the formulas (1), (2) and (3) R.sup.1.sub.n SiO.sub.(4-n)/2 ( 1) R.sup.2.sub.m SiO.sub.(3-m)/2 --A--B (2) (CH.sub.3).sub.2 SiO.sub.2/2 ( 3) and in which the structural units of formula (3) are present in an amount of not less than 80 wt % of the polysiloxane portion, and, thereafter, (B) stretching and drying said film so that the thickness of said coating is 0.005-3 μm; wherein R 1 and R 2 are independently an unsubstituted or substituted hydrocarbyl group wherein said hydrocarbyl group has a carbon atom directly connected to the Si atom and has no radical polymerizability; n is 1 or 2, and when n is 2, the R 1 groups are identical or non-identical; m is 0 or 1; A is a divalent organic group which has a carbon directly connected to the Si atom and is connected to the group B; and B is a vinyl polymer block obtained by grafting at least one monomer selected from the group consisting of aromatic vinyl monomers, alkyl esters of acrylic acid and alkyl esters of methacrylic acid.
Claim 12
Dependent Claim
26 words
The product of claim 9, wherein the graft copolymer is formed by the step of (I) polycondensing units of formulas (1) and (2), to make polyorganosiloxane.
Claim 13
Dependent Claim
11 words
The polyester film of claim 1 further comprising an antistatic compound.
Claim 14
Dependent Claim
29 words
The polyester film of claim 1, wherein said coating further comprises one or more from the group consisting of metallic powders, metal oxides, electrically conductive carbon black, and surfactants.
Claim 15
Dependent Claim
30 words
The polyester film of claim 1, wherein said coating further comprises one or more from the group consisting of defoaming compounds, organic lubricants, anti-oxidizing compounds, UV-absorbing compounds, dyes, and pigments.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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