-
公开(公告)号：US20190382521A1
公开(公告)日：2019-12-19
申请号：US16556396
申请日：2019-08-30
Applicant: STEPAN COMPANY
Inventor： Warren A. KAPLAN , Jennifer S. WESTFALL
Abstract: Isocyanate-modified polyester-epoxide polymer (i-PEEP) compositions are disclosed. The i-PEEP compositions comprise a reaction product of a polyepoxide compound, a polyisocyanate, and a polyester polyol composition. The ratio of epoxy equivalents to hydroxyl equivalents is within the range of 0.2 to 2. The i-PEEP index as defined herein is within the range of 100 to 200. The i-PEEP composition has a Tg within the range of −30° C. to 35° C. Low- and elevated-temperature processes catalyzed by bases or Lewis acids for making the i-PEEP compositions are also disclosed. In a simple yet innovative approach, a new class of polymers useful for coatings, elastomers, adhesives, sealants, and other valuable products is assembled from readily available starting materials without reliance on the polyamines typically used to cure epoxy systems.
-
公开(公告)号：US20210024744A1
公开(公告)日：2021-01-28
申请号：US17066741
申请日：2020-10-09
Applicant: STEPAN COMPANY
Inventor： Warren A. KAPLAN , Zhenhua CUI , Sarah WOLEK
Abstract: Blends comprising an aromatic polyester polyol and a 1 to 10 wt. % of a fatty acid derivative are disclosed. The fatty acid derivative is a C8 to C18 fatty acid ester or a C8 to C18 fatty acid amide. Also disclosed are rigid PU or PU-PIR foams that comprise a reaction product of water, a catalyst, a foam-stabilizing surfactant, a polyisocyanate, a blowing agent, and the polyester polyol/fatty acid derivative blends. Surprisingly, low-temperature R-values of rigid foams based on pentane blowing agents can be improved significantly by using blends of aromatic polyester polyols and a minor proportion of readily available fatty acid derivatives. In some aspects, the difference between initial R-values of the foam measured at 75° F. and 40° F. is at least 5% greater than that of a similar foam prepared in the absence of the fatty acid derivative.
-
公开(公告)号：US20180086873A1
公开(公告)日：2018-03-29
申请号：US15809090
申请日：2017-11-10
Applicant: Stepan Company
Inventor： Sarah WOLEK , Warren A. KAPLAN , Laura SCHREINER
CPC classification number: C08G18/4891 , C08G18/10 , C08G18/14 , C08G18/163 , C08G18/165 , C08G18/1833 , C08G18/225 , C08G18/244 , C08G18/4018 , C08G18/42 , C08G18/48 , C08G18/4804 , C08G18/7664 , C08G2101/005 , C08G2101/0083
Abstract: Alkoxylated natural oils are useful for preparation of water-blown polyurethane foams and can replace polyols and emulsifiers generally used in the art to provide polyol compositions having greater shelf-stability and blend-stability. Methods for preparing polyol compositions useful for preparation of water-blown polyurethane compositions, for preparing the polyurethane compositions using the polyol compositions, and kits comprising the polyol compositions are also described.
-
公开(公告)号：US20230272212A1
公开(公告)日：2023-08-31
申请号：US18144777
申请日：2023-05-08
Applicant: STEPAN COMPANY
Inventor： Warren A. KAPLAN , Zhenhua CUI , Sarah WOLEK
CPC classification number: C08L67/03 , C08G18/73 , C08G18/4263 , C08J9/141 , C08G2110/0025 , C08J2203/14 , C08J2203/182 , C08J2205/10 , C08L2205/03 , C08L2205/025
Abstract: A rigid PU or PU-PIR foam comprising a reaction product of water, a catalyst, a foam-stabilizing surfactant, a polyisocyanate, a blowing agent and a blend comprising: (a) 90 to 99 wt.% of an aromatic polyester polyol having a hydroxyl number within the range of 150 to 400 mg KOH/g; and (b) 1 to 10 wt.% of a fatty acid derivative selected from the group consisting of C8 to C18 fatty acid esters and C8 to C18 fatty acid amides.
-
Patent Agency Ranking
公开(公告)号：US20190225742A1
公开(公告)日：2019-07-25
申请号：US16327086
申请日：2017-08-08
Applicant: STEPAN COMPANY
Inventor： Warren A. KAPLAN , Jennifer S. WESTFALL
Abstract: Polyester-epoxide polymer (PEEP) compositions are disclosed. The PEEP compositions comprise a reaction product of a polyepoxide compound (eq. wt. 125 to 250 g/eq.) and a polyester polyol composition. The ratio of epoxy equivalents to hydroxyl equivalents is within the range of 0.8 to 3.5. The PEEP composition has a Tg within the range of −40° C. to 60° C. Elevated temperature-cure and low temperature-cure processes for making the PEEP compositions are also disclosed. In a simple yet innovative approach, a new class of polymers useful for adhesives, coatings, elastomers, and other valuable products is assembled from readily available starting materials without reliance on polyisocyanates or polyamines. The PEEP compositions have increased elongation and lower Tg when compared with traditional epoxy products.
-
公开(公告)号：US20220411567A1
公开(公告)日：2022-12-29
申请号：US17775249
申请日：2020-11-05
Applicant: STEPAN COMPANY
Inventor： Carl William LISKEY , Warren A. KAPLAN , Daniel YOCIUS
Abstract: Rigid polyurethane or polyisocyanurate foams, polyester polyols used to produce them, and methods for formulating the foams are disclosed. The foams comprise a reaction product of a polyisocyanate, a polyester polyol, water, a surfactant, a catalyst and optional ingredients. The polyester polyols comprise a phthalimide-containing polyacid, a phthalimide-containing polyol, or a combination thereof. Rigid foams produced from the polyester polyols exhibit higher thermal stability and/or greater intumescence when compared with foams made from other polyester polyols. The phthalimide-containing polyester polyols should allow formulators to improve the flammability performance of rigid foams with reduced levels of flame retardants and/or lower index and should facilitate the production of thinner insulation panels.
-
公开(公告)号：US20210309895A1
公开(公告)日：2021-10-07
申请号：US17348199
申请日：2021-06-15
Applicant: STEPAN COMPANY
Inventor： Michael E. O'BRIEN , Warren A. KAPLAN , Jennifer S. WESTFALL
IPC: C09J163/04
Abstract: One-component (1K) adhesive compositions (“PEEP” compositions) and a process for making them are disclosed. A polyepoxide is reacted with a polyether polyol composition, a polyester polyol composition, or both in the presence of a heat-activated Lewis acid catalyst at a temperature within the range of 100° C. to 220° C. for a time effective to cure the adhesive. The compositions are storage-stable under ambient conditions. Compared with conventional epoxy compositions, the 1K PEEP compositions offer improved room temperature lap shear strength, better resilience, and higher elongation. The 1K PEEP systems deliver a desirable balance of physical and mechanical properties while avoiding polyisocyanates and polyamine crosslinkers.
-
公开(公告)号：US20200377646A1
公开(公告)日：2020-12-03
申请号：US16994220
申请日：2020-08-14
Applicant: STEPAN COMPANY
Inventor： Zhenhua CUI , Warren A. KAPLAN , Sarah WOLEK
Abstract: Polyether- or polyester-epoxide polymer (PEEP) compositions are disclosed. The compositions comprise reaction products of a polyepoxide compound and a polyol composition. The polyol composition has a melting point within the range of 20° C. to 100° C. and a hydroxyl number less than 35 mg KOH/g. The PEEP composition is a solid-solid phase-change material. As measured by differential scanning calorimetry (DSC) at a heating/cooling rate of 10° C./minute, the PEEP composition has a transition temperature within the range of −10° C. to 70° C., a latent heat at the transition temperature within the range of 30 to 200 J/g, and little or no detectable hysteresis or supercooling upon thermal cycling over at least five heating/cooling cycles that encompass the transition temperature. The PEEP compositions should enable formulators to manage thermal energy changes in many practical applications, including automotive, marine or aircraft parts, building materials, appliance insulation, electronics, textiles, garments, and paints or coatings.
-
公开(公告)号：US20200010666A1
公开(公告)日：2020-01-09
申请号：US16571970
申请日：2019-09-16
Applicant: STEPAN COMPANY
Inventor： Warren A. KAPLAN , Jennifer S. WESTFALL
Abstract: Polyether-epoxide polymer compositions are disclosed. The compositions comprise a reaction product of a polyepoxide compound and a polyol composition comprising a polyether polyol. The ratio of epoxy equivalents to hydroxyl equivalents is within the range of 0.5:1 to 3:1. The polyether-epoxide composition has a Tg within the range of −40° C. to 60° C. The polyether polyol has a hydroxyl value within the range of 150 to 800 mg KOH/g and an average hydroxyl functionality within the range of 3.5 to 8.0. In some aspects, the polyol composition further comprises a polyester polyol. Low- and elevated-temperature processes catalyzed by bases or Lewis acids for making the polyether-epoxide compositions are also disclosed. In a simple yet innovative approach, a new class of polymers useful for coatings, elastomers, adhesives, sealants, and other valuable products is assembled from readily available starting materials without reliance on polyamines or polyisocyanates.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.011 seconds)
