Process for producing thermoformable foam sheet using a physical blowing agent

Abstract

The present invention is a process for producing a thermoplastic foam sheet comprising contacting a molten monovinylidene aromatic or olefinic polymer with a physical blowing agent to form a polymer/blowing agent mixture, and foaming the mixture into a region of lower pressure within a sheet extrusion line, wherein the extrudate is pulled and compressed to form a thermoplastic foam sheet having a uniform thickness.

用物理性发泡剂生产热成型泡沫板

摘要

本发明描述了一种热塑性泡沫板材的生产工艺，它将熔化的单亚乙烯基芳香族或烯族聚合物与物理性发泡剂混合，生成聚合物 发泡剂的混合物，再将混合物在板材挤出生产线的低压区间发泡，挤出物经牵引和压缩后，形成具有均匀厚度的热塑性泡沫板材。

Polyol composition containing a hydrocarbon blowing agent

Abstract

The present invention discloses a polyol resin composition containing a polyether polyol blend, a polyester polyol, and a hydrocarbon blowing agent. The polyether polyol blend has at least a diamine initiated polyol, a propylene oxide polyol, and a polyethylene terephthalate initiated polyol having a functionality of from 2.3 to 3.0. The polyester polyol is preferably a phthalic< anhydride initiated polyester polyol. The blowing agent is a C.sub.4 -C.sub.6 hydrocarbon. Also disclosed is a method of producing a polyurethane foam combining the above mentioned polyol resin and an isocyanate component.

含碳氢类发泡剂的多醇混合物

摘 要

本发明描述了一种多醇树酯混合物，混合物中含一种聚醚多醇混合物，一种聚酯多醇和一种碳氢类发泡剂。聚醚多醇混合物中有一种以上的以 二胺为引发剂的多醇，一种氧化丙烯多醇，一种以聚乙烯对苯二酸盐为引发剂的多醇，官能度为2.3~3.0。聚酯多醇最好是以邻苯二甲酸酐为引发剂的聚酯多醇。发泡剂为C4或C6碳氢化合物。另外，本文还描述了用这种多醇 树酯和异氰酸酯化合物反应制得聚氨酯泡沫的方法。

Blowing agent compositions containing hydrofluorocarbons and a low-boiling alcohol and/or low-boiling carbonyl compound

Abstract

The present invention relates to blowing agent compositions that contain at least one hydrofluorocarbon having a boiling point of 30.degree.C. or higher and lower than about 120.degree.C., at least one hydrofluorocarbon having a boiling point lower than 30.degree.C., and at least one component selected from low-boiling alcohols and low-boiling carbonyl compounds. The present invention also relates to processes for preparing polymeric foam using such blowing agent compositions, as well as polymeric foams and foamable polymer compositions containing such blowing agent compositions.含氢氟碳和低沸点乙醇和/或低沸点羰基化合物的发泡剂

摘要

本发明描述了一种发泡剂混合物，它含有一种以上沸点为30℃或在30~120℃之间的氢氟碳化合物，一种以上沸点低于30℃的 氢氟碳化合物，和一种以上低沸点乙醇和低沸点羰基化合物的混合物。另外，本发明还描述了用该发泡剂制备聚合泡沫的工艺，以及制备含该发泡剂的聚合泡沫和发泡组合料的工艺。

Phase stable polyol composition containing hydrocarbon as the blowing agent

Abstract

The present invention discloses a phase stable polyol blend composition containing a sucrose and dipropylene glycol co-initiated propylene oxide polyether polyol, a polyester polyol, a compatibilizing agent and a hydrocarbon blowing agent. The polyester polyol is preferably a phthalic anhydride-initiated polyester polyol. The compatibilizing agent is a butanol-initiated propylene oxide polyether surfactant.

以碳氢化合物为发泡剂的稳定相位多醇

摘 要

本发明介绍了一种相位稳定的多醇混合物，它含有一种由蔗糖和一缩二丙二醇为共引发剂引发的氧化丙烯聚醚多醇，一种聚酯多醇，一种相容剂和一种碳氢化合物发泡剂。聚酯多酯最好是以邻苯二甲酸酐为引为剂的聚酯多醇。相容剂是以丁醇为引发剂的氧化丙烯聚醚表面剂。

Blowing agent blends

Abstract

The polyisocyanurate closed-cell foams. More particularly, the invention relates to polyurethane and polyisocyanurate closed-cell foams prepared with a blowing agent comprising 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124) and 1,1-dichloro-1-fluoroethane (HCFC-141b). Foams prepared with the blowing agent of the invention possess improved thermal performance.

发泡剂混合物

摘要

本发明是关于聚氨酯和聚异氰脲酸酯闭孔泡沫。更需注意的是，本发明介绍了用HCFC-124和制备聚氨酯和聚异氰 脲酸酯闭孔泡沫。用该发泡剂制得的泡沫绝热性能有明显的提高。

Manufacture of non-CFC cellular foams using perflurinated ethers

The invention relates to a process for producing non-CFC resol foams of low density using perfluorinated ethers along with a HCFC or CFC blowing agent, and to foams produced by such a process. The process generally comprises: (a) forming a mixture by combining a resol resin with a blowing-agent blend comprising (i) at least one blowing agent selected from the group consisting of hydrogenated chlorofluorocarbons and hydrogenated fluorocarbons and (ii) at least one perfluoroether additive selected from the group consisting of perfluorinated ethers; (b) adding an acid catalyst to the mixture to initiate foaming and form a foam; and (c) curing the foam to form a cured foam that is essentially free of CFCs.

用全氟化聚醚生产低密度甲阶段酚醛树酯泡沫

摘 要

本文介绍了一种以HCFC或CFC为发泡剂、用全氟化聚醚生产低密度甲阶段酚醛树酯泡沫的工艺，以及用该工艺生产的泡沫。工艺包括(a)用甲阶段酚醛 树酯和发泡剂混合形成混合物，包括(i)一种以上含氢化氯氟碳和氢化碳氟化合物的发泡剂(ii)一种以上含全氟化醚的全氟化 醚添加物;（b）向混合物中加入酸性催化剂，开始发泡；(c)泡沫固化，固化后泡沫中不含CFC。

Blowing agent blends

Abstract

Foam blowing agent blends of D11 and a pentane are provided, as are polyol premixes containing such blends. The resulting foams exhibit dramatic improvement in fire resistance.
发泡剂混合物
                                                 摘 要
本文描述了D11和戊烷的发泡剂混合物以及含该发泡剂的多醇预聚体。所制得的泡沫在阻燃性方面有明显的改善。

Extruded foam product with 134a and alcohol blowing agent

Abstract

The present invention generally relates to methods for preparing extruded foam products and more particularly to a methods for producing such products with a blowing agent containing 134a and an alcohol.
以134a和乙醇为发泡剂制备的挤塑泡沫

摘 要

本发明主要打描述挤塑泡沫的制备方法，其中一个特殊的方法是用含134a和乙醇的发泡剂进行制备。

Blowing agent blends

Abstract

Foam blowing agents blends of HFC-134a and a pentane selected from n-pentane, i-pentane and i-pentane/cyclopentane are provided, as are polyol premixes and polyurethane foam compositions containing such blends.

发泡剂混合物

本发明描述了一种含HFC134a和戊烷的发泡剂混合物，以及含该发泡剂的多醇预聚体和聚氨酯泡沫组合料，其中戊烷从正戊烷、异戊烷、异戊烷/环戊烷选择。