High clarity laminated articles comprising an ionomer interlayer
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-017/10
B32B-027/32
B32B-015/08
B32B-027/36
출원번호
US-0610688
(2009-11-02)
등록번호
US-8399097
(2013-03-19)
발명자
/ 주소
Bennison, Stephen J.
Hayes, Richard Allen
Pesek, Steven C.
Shaffer, W Alexander
Smith, Charles Anthony
출원인 / 주소
E I du Pont de Nemours and Company
대리인 / 주소
Kourtakis, Maria M.
인용정보
피인용 횟수 :
3인용 특허 :
48
초록▼
A safety laminate comprises an interlayer that comprises an ionomer that is the neutralized product of a precursor acid copolymer. The precursor acid copolymer comprises copolymerized units of a first α-olefin having 2 to 10 carbon atoms and about 20 to about 30 wt % of copolymerized units of a firs
A safety laminate comprises an interlayer that comprises an ionomer that is the neutralized product of a precursor acid copolymer. The precursor acid copolymer comprises copolymerized units of a first α-olefin having 2 to 10 carbon atoms and about 20 to about 30 wt % of copolymerized units of a first α,β-ethylenically unsaturated carboxylic acid having 3 to 8 carbon atoms; and has a melt flow rate of about 10 to about 4000 g/10 min. When neutralized to a level of about 40% to about 90% and when comprising counterions that consist essentially of sodium cations, the precursor acid copolymer produces a sodium ionomer that has a melt flow rate of about 0.7 to about 25 g/10 min and a freeze enthalpy that is not detectable or that is less than about 3.0 j/g. The ionomer composition may further comprise a second ionomer that has a melt flow rate of about 10 g/10 min or less.
대표청구항▼
1. A safety laminate comprising at least one interlayer sheet that is laminated to one or more rigid sheets, one or more other polymeric interlayer sheets, or one or more film layers; said at least one interlayer sheet comprising an ionomer composition; and said ionomer composition comprising a firs
1. A safety laminate comprising at least one interlayer sheet that is laminated to one or more rigid sheets, one or more other polymeric interlayer sheets, or one or more film layers; said at least one interlayer sheet comprising an ionomer composition; and said ionomer composition comprising a first ionomer that is the neutralized product of a first precursor acid copolymer; wherein (i) the first precursor acid copolymer comprises copolymerized units of ethylene and about 20 to about 30 wt %, based on the total weight of the first precursor acid copolymer, of copolymerized units of a first α,β-ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid and methacrylic acid; (ii) the first precursor acid copolymer has a melt flow rate of about 10 to about 4000 g/10 min, as determined in accordance with ASTM D1238 at 190° C. and 2.16 kg; and wherein (iii) said precursor acid copolymer, being neutralized to a level of about 40% to about 90% based on the total number of the carboxylic acid groups present in the precursor acid copolymer, produces a sodium ionomer, said sodium ionomer comprising carboxylate groups and counterions, said counterions consisting essentially of sodium cations, and wherein the sodium ionomer has a melt flow rate of about 0.7 to about 25 g/10 min and a freeze enthalpy that is not detectable or that is less than about 3.0 j/g, when determined by differential scanning calorimetry in accordance with ASTM D3418. 2. The safety laminate of claim 1, wherein the first precursor acid copolymer has a melt flow rate of about 100 to about 500 g/10 min. 3. The safety laminate of claim 1, wherein the first precursor acid copolymer comprises about 20 to about 25 wt % of copolymerized units of the first α,β-ethylenically unsaturated carboxylic acid. 4. The safety laminate of claim 1, wherein about 40% to about 70% of the carboxylic acid groups present in the first precursor acid copolymer have been neutralized by a sodium ion-containing base. 5. The safety laminate of claim 4, wherein the first ionomer has a melt flow rate of about 1 to about 10 g/10 min. 6. The safety laminate of claim 4, wherein the first ionomer has a freeze enthalpy less than or equal to 2 j/g. 7. The safety laminate of claim 1, wherein the ionomer composition further comprises a second ionomer that is the neutralization product of a second precursor acid copolymer, wherein (i) the second precursor acid copolymer comprises copolymerized units of ethylene and about 18 to about 30 wt % of copolymerized units of a second α,β-ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid and methacrylic acids; (ii) the second α,β-ethylenically unsaturated carboxylic acid is the same as or different from the first α,β-ethylenically unsaturated carboxylic acid; (iii) the second precursor acid copolymer has a melt flow rate of about 60 g/10 min or less; and (iv) the second ionomer has a melt flow rate of about 10 g/10 min or less, as determined in accordance with ASTM D1238 at 190° C. and 2.16 kg. 8. The safety laminate of claim 7, wherein the first precursor acid copolymer has a melt flow rate of about 150 to about 400 g/10 min and the second precursor acid copolymer has a melt flow rate of about 30 g/10 min or less. 9. The safety laminate of claim 7, wherein the first precursor acid copolymer comprises about 20 to about 25 wt % of copolymerized units of the first α,β-ethylenically unsaturated carboxylic acid; wherein the second precursor acid copolymer comprises about 20 to about 25 wt % of copolymerized units of the second α,β-ethylenically unsaturated carboxylic acid; wherein the first and second α,β- ethylenically unsaturated carboxylic acid are the same or different; and werein the amounts of the copolymerized units of the first and the second α,β-ethylenically unsaturated carboxylic acids are the same or different. 10. The safety laminate of claim 7, wherein the first and the second ionomers comprise cations that consist essentially of sodium cations. 11. The safety laminate of claim 7, wherein the first ionomer has a melt flow rate of about 0.7 to about 10 g/10 min and the second ionomer has a melt flow rate of about 5 g/10 min or less. 12. The safety laminate of claim 7, wherein the ionomer composition comprises about 60 to about 95 wt % of the first ionomer and about 5 to about 40 wt % of the second ionomer, based on the total weight of the ionomer composition. 13. The safety laminate of claim 1, wherein the rigid sheet comprises a material having a modulus of about 690 MPa or greater, as determined in accordance with ASTM D638, and wherein the material is selected from the group consisting of glass, metal, ceramic, and polymers. 14. The safety laminate of claim 1 that comprises the one or more film layers, wherein the film layer(s) are a metal film or a polymeric film comprising one or more materials selected from the group consisting of polyesters, polycarbonates, polyolefins, norbornene polymers, polystyrenes, styrene-acrylate copolymers, acrylonitrile-styrene copolymers, polysulfones, polyamides, polyurethanes, acrylic polymers, cellulose acetates, cellophanes, vinyl chloride polymers and fluoropolymers. 15. The safety laminate of claim 1, comprising the one or more other polymeric interlayer sheets, wherein the one or more other polymeric interlayer sheets comprise one or more materials selected from the group consisting of poly(vinyl acetals), poly(vinyl chlorides), polyurethanes, ethylene/vinyl acetate copolymers, acid copolymers, and ionomers. 16. The safety laminate of claim 1, comprising two rigid sheets; wherein the rigid sheets are glass sheets; and wherein the at least one interlayer sheet comprising the ionomer composition is laminated between the two glass sheets. 17. The safety laminate of claim 1, comprising one rigid sheet and one film layer; wherein the rigid sheet is a glass sheet; wherein the film layer is a polyester film that is coated with an abrasion resistant hardcoat; wherein the at least one interlayer sheet comprising the ionomer composition is laminated between the glass sheet and the polyester film; and wherein the abrasion resistant hardcoat is coated on the surface of the polyester film that is facing away from the interlayer sheet. 18. The safety laminate of claim 1, which comprises n rigid sheet or film layers and (n−1) polymeric interlayer sheets, wherein (a) each of the adjacent pairs of the rigid sheet or film layers is interspaced by one of the polymeric interlayer sheets; (b) at least one of the (n−1) polymeric interlayer sheets comprises the ionomer composition, and (c) n is an integer and 2
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