Weatherable block copolyestercarbonates and blends containing them

A technology of copolycarbonate and block copolymer, applied in the direction of machine/engine, transportation and packaging, mechanical equipment, etc., can solve the problem of not providing weather resistance in detail, and achieve the effect of improving weather resistance

Inactive Publication Date: 2002-01-23
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But did not provide details of its weather resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0037] To several 1-liter four-necked flasks equipped with a mechanical stirrer, nitrogen inlet, reflux condenser, and two pressure-equalizing addition funnels, add 5 mmol of tetra-n-butylammonium bromide (TBAB) or methyltri-n-butyl chloride Ammonium (MTBAC), varying amounts of resorcinol and 150 ml of degassed dichloromethane. Then purging the flask with nitrogen, in each addition funnel, charge respectively 212mmol of 15% aqueous sodium hydroxide solution (maintained at 20°C and purging with nitrogen), and the m-phthalylene dissolved in 100ml of dichloromethane Various degassed mixtures of acid chloride and terephthaloyl chloride.

[0038] The sodium hydroxide solution was added to the flask under a nitrogen atmosphere while stirring, and the resorcinol was subsequently dissolved to form a translucent two-phase mixture. The isophthaloyl / terephthaloyl chloride mixture was then added and stirring continued followed by an exotherm leading to weak reflux. Stirring was continue...

Embodiment 11

[0044] A sample of the product of Example 6 (2 g) and several other materials described below were dissolved in methylene chloride or chloroform (8 ml) and a film about 250 μm thick was applied to a glass plate with a doctor blade. The solvent was allowed to evaporate leaving a film approximately 40 [mu]m thick, which was floated from the glass plate with water. The haze value of the obtained film was measured with a Gardner XL-835 haze meter.

[0045] The results obtained are shown in Table II. The following other materials were evaluated; commercially available bisphenol A polycarbonate (PC), a resorcinol polycarbonate with a 1:1 ratio of isophthalate to terephthalate groups and a molecular weight of approximately 50,000 Aryl compound (RPA), a blend of PC with the product of Example 6, and two PC-RPA blends.

[0046] film material

[0047] These results illustrate the improved miscibility of the blend of block copolycarbonate and polycarbonate of Example 6 compar...

Embodiment 12～16

[0049] Various amounts of resorcinol and triethylamine and 100ml of dichloromethane were added to a 1-liter three-necked flask equipped with a reflux condenser, a mechanical stirrer and a pressure-equalizing addition funnel. The flask was protected with nitrogen, and a solution of 10.151 g (50 mmol) of isophthaloyl chloride and terephthaloyl chloride in 150 ml of dichloromethane was added dropwise over 4 to 8 minutes, so as to maintain a steady reflux. The mixture was stirred at reflux temperature for an additional 30 min, then transferred to a separatory funnel, washed once with water, twice with dilute hydrochloric acid and once with water.

[0050] The oligomer solution was transferred to a phosgenation reactor similar to that of Examples 1-10. After addition of bisphenol A, triethylamine (1 mol % based on bisphenol A), water and p-cumylphenol as chain terminator, the phosgenation reaction was carried out as described in the example .

[0051] The results obtained and pro...

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Abstract

A process for preparation of block copolyestercarbonates which is implemented as follow: first conducting a reaction between at least one of resorcinol or an alkyl- or haloresorcinol and at least one aromatic dicarboxylic acid dichloride, preferably isophthaloyl dichloride, terephthaloyl dichloride or a mixture thereof, to produce a hydroxy-terminated polyester intermediate, and then conducting a reaction of the intermediate with a carbonate precursor, preferably in the presence of a dihydroxy compound such as bisphenol A. The products have excellent physical properties, including a high degree of weatherability. They may be blended with other polymers such as polycarbonates, poly(alkylene carboxylates), polyarylates, polyetherimides, and addition polymers to improve the weatherability thereof.

Description

Background of the invention [0001] This invention relates to resin compositions of matter and, more particularly, to block copolycarbonates having improved weatherability. [0002] Polycarbonates and polyesters, especially polydicarboxylate alkylene glycol esters, and their blends are a class of widely used polymers, in part because of their excellent physical properties, including high impact strength. However, there is a problem of long-term color instability. This causes yellowing, which detracts from the clarity and attractiveness of the polymer. Tarnish is also an undesirable long-term phenomenon. [0003] The yellowing of polycarbonates and polyesters is mainly caused by the action of UV radiation, which is why this yellowing is often referred to as "photoyellowing". A number of means of inhibiting photoyellowing have been used and proposed. Many of these approaches involve incorporating ultraviolet absorbing compounds (UVA) into the polycarbonate. In most cases, U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R13/02B60R13/04C08G63/64C08G63/78C08L57/00C08L67/00C08L67/02C08L67/03C08L69/00C08L79/08F02B61/04
CPCC08L67/03C08L67/00F02B61/045C08G2261/126C08L69/00C08L69/005C08L67/02C08G64/18C08G63/78C08G63/64C08L79/08C08K3/013
Inventor T·M·斯克洛范J·L·韦布S·B·布朗小D·J·布克利J·E·皮克特
Owner SABIC GLOBAL TECH BV
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