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KR930021688A - 라텍스 캡슐 및 그 제조방법 - Google Patents

라텍스 캡슐 및 그 제조방법 Download PDF

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KR930021688A
KR930021688A KR1019930006002A KR930006002A KR930021688A KR 930021688 A KR930021688 A KR 930021688A KR 1019930006002 A KR1019930006002 A KR 1019930006002A KR 930006002 A KR930006002 A KR 930006002A KR 930021688 A KR930021688 A KR 930021688A
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미첼 블랑켄쉽 로버트
제이 니하트 클라렌스
코발스키 알렉산더
윌리엄 노박 로날드
보겔 마틴
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윌리엄 이. 램버트 3세
롬 앤드 하스 캄파니
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Abstract

본 발명은 코어내에 미소공극들을 포함하며 그 미소공극들을 입자 외부로 연결하는 하나 이상의 홈들을 갖는 코어/셀 중합체 입자들에 관한 것이다. 이러한 입자들(LCAPs)은 중합체 산의 코어를 형성하고, 그 코어를 염기에 투과성인 셀 중합체로 둘러싸고, 코어가 팽윤되도록 코어를 중화시켜 조절된 양식으로 셀이 폭발하도록 함으로써 산출되는데, 그러한 조절된 폭발은 셀내에 홈이 형성되는 것을 초래한다. 상기 입자들은 목적 화합물들에 대한 조절 방출제로서, 아크릴 필름 강화제로서, 코팅 조성물들에서의 불투명화제로서, 및 그러한 코팅 조성물들내에 본래 사용되는 착색 물질 또는 전개제둘의 일부 또는 전부에 대한 보충물질 또는 대체물질로서 사용될 수 있다.

Description

라텍스 캡슐 및 그 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 실시예 2에서 제조된 필름들의 탄성 계수 vs. 주파수의 관계를 나타낸 그래프이다.

Claims (26)

  1. 다음 단단계들을 포함하여 구성되는, 수불용성 중합체 입자들의 수성 분산액의 제조방법. (a) 하나 이상의 모노에틸렌계 불포화 단량체들 및 최소한 5몰퍼센트의 카르복시산 또는 무수물 단량체를 포함하는 코어 단량체 시스템을 자유 라디칼 개시제를 함유하는 수성 매체내에서 연속 유화 중합시켜, 0.05-1 미크론의 평균 직경을 갖는 분산된 코어 입자들을 형성함. (b)상기 단계 (a)에서 산출된 분산된 코어 입자들의 존재하에서, 이온화가능한 기를 갖지 않는 최소한 하나의 모노에틸렌계 불포화 단량체를 포함하는 셀 단량체 시스템을 중합시켜 코어 입자들 상에 셀 중합체를 형성함. 여기서, 셀 단량체 혼합물 내의 모노에틸렌계 불포화 카르복시산을 셀 단량체들의 10몰퍼센트 이하의 양으로 존재하며, 결과의 코어/셀 입자들은 중화 및 팽윤전 0.07-4.5 미크론의 평균 직경을 갖고, 코어-형성 단량체(들)과 셀-형성 단량체(들)의 상대적 양은 결과의 분산 입자들내 총 중합체 중량에 대한 코어 중량의 비가 1:2 내지 1:100이 되는 것임.
    (c) 형성된 상기 입자들을 상기 코어가 팽윤되도록 염기와 함께 중화시켜 코어 내에 미소공극을 포함하며 그 미소공극들을 입자 외부로 연결하는 하나 이상의 홈들을 갖는 입자들을 형성함.
  2. 제1항에 있어서, 상기 코어를 팽윤시키는데 사용된 염기가 암모니아, 아민, 수산화나트륨, 수산화칼륨 및 수산화리튬으로 구성된 군으로 부터 선택된 것인 방법.
  3. 제1항에 있어서, 상기 코어를 팽윤시키는데 사용된 염기가 암모니아인 방법.
  4. 제1항에 있어서, 상기 코어 단량체들의 최소한 10몰퍼센트가 카르복시산기를 갖는 것인 방법.
  5. 제1항에 있어서, 상기 코어 단량체들의 최소한 30몰퍼센트가 카르복시산기를 갖는 것인방법.
  6. 제1항에 있어서, 카르복시산 또는 무수물 기를 갖는 상기 코어 단량체들이 아크릴산, 메타크릴산, 아크릴옥시프로피온산, 메타크릴옥시프로피온산, 아크릴옥시아세트산, 메타크릴옥시아세트산, 모노메틸 산 멜레에이트, 모노메틸산 이타코네이트, 크로톤산, 아코니트산, 말레산, 말레산 무수물, 푸마르산, 모노메틸 푸마레이트 및 메타크릴산 무수물로 구성된 부터 선택된 것인방법.
  7. 제1항에 있어서, 카르복시산기를 갖는 상기 코어 단량체가 메타크릴산인 방법.
  8. 제1항에 있어서, 5몰퍼센트 이하의 상기 셀 단량체들이 카르복시산기를 갖는 것인 방법.
  9. 제1항에 있어서, 상기 코어 성분 대 상기 셀 성분의 중량비가 1:4 내지 1:15인 것인 방법.
  10. 제1항에 있어서, 형성된 입자들의 최소한 85%가 코어내에 미소공극을 포함하고 그 미소공극을 입자의 외부로 연결하는 하나 이상의 홈을 갖는 것인 방법.
  11. 중공 코어, 그 코어를 둘러싼 셸, 및 중공 코어를 입자 외부로 연결하는 최소한 하나의 홈을 포함하며 0.1-5.0 미크론의 평균 직경을 갖는 중합체 입자.
  12. 제11항에 있어서, 모노에틸렌계 불포화 단량체들의 수성 유화중합에 의하여 형성된 것인 중합체 입자.
  13. 제11항에 있어서, 다음 단계들에 의하여 형성된 것인 중합체입자.
    (a) 하나이상의 모노에틸렌계 불포하 단량체들 및 최소한 5몰퍼센트의 카르복시산 또는 무수물 단량체를 포함하는 코어 단량체 시스템을 자유 라디칼 개시제를 함유하는 수성 매체내에서 연속 유화 중합시켜, 0.05-1미크론의 평균직경을 갖는 분산된 코어 입자들을 형성함.
    (b) 상기단계 (a)에서 산출된 분산된 코어 입자들의 존재하에서, 이온화가능한 기를 갖지 않는 최소한 하나의 모노에틸렌계 불포화 단량체를 포함하는 셸 단량체 시스템을 중합시켜 코어 입자들 상에 셸 중합체를 형성함. 여기서, 셸 단량체 혼합물 내의 모노에틸렌계 불포화 카르복시산을 셸 단량체들의 10몰퍼센트 이하의 양으로 존재하며, 코어-형성 단량체(들)과 셸-형성 단량체(들)의 상대적 양은 결과의 분산 입자들내 총 중합체 중량에 대한 코어 중량의 비가 1:2 내지 1:100이 되는 것이고, 코어를 입자의 외부로 연결하는 최소한 하나의 홈은 상기 코어가 팽윤되도록 상기 입자들을 염기와 함께 중화시킴에 의하여 형섬됨.
  14. 제13항에 있어서, 상기 코어를 팽윤시키는데 사용된 염기가 암모니아, 아민, 수산화나트륨, 수산화칼륨, 및 수산화리튬으로 구성된 군으로부터 선택된 것인 중합체 입자.
  15. 제13항에 있어서, 상기 코어를 팽윤시키는데 사용된 염기가 암모니아인 것인 중합체 입자.
  16. 제13항에 있어서, 상기 코어 단량체들의 최소한 10몰퍼센트가 카르복시산기를 갖는 것인 중합체 입자.
  17. 제13항에 있어서, 상기 코어 단량체들의 최소한 30몰퍼센트가 카르복시산기를 갖는 것인 중합체 입자.
  18. 제13항에 있어서, 카르복시산 또는 무수물기를 갖는 상기 코어 단량체들이 아크릴산, 메타크릴산, 아크릴 옥시프로피온산, 메타크릴옥시프로피온산, 아크릴옥시아세트산, 메타크릴옥시아세트산, 모노메틸산 말레에이트, 모노메틸산 이타코네이트, 크로톤산, 아코니트산, 말레산, 말레산 무수물, 푸마르산, 모노메틸 푸마레이트 및 메타크릴산 무수물로 구성된 군으로부터 선택된 것인 중합체 입자.
  19. 제13항에 있어서, 카르복시산기를 갖는 상기 코어 단량체가 메타크릴산인 것인 중합체 입자.
  20. 제13항에 있어서, 5몰퍼센트 이하의 상기 셸 단량체들이 카르복시산기를 갖는 것인 중합체 입자.
  21. 제13항에 있어서, 코어 성분 대 셸 성분의 중량비가 1:4 내지 1:10인 중합체 입자.
  22. 제13항에 있어서, 수성 상 대 중합체 입자들의 중량비가 10:1 이하인 것인 중합체 입자.
  23. 제11항에 있어서, 중공 코어를 입자 외부로 연결하는 하나의 홈을 갖는 중합체 입자.
  24. 중합체 필름들을 강화시키는데 유효한 양으로 사용되는 청구범위 13항의 중합체 입자의 용도.
  25. 코팅 조성물들에서 불투명화제로 유화한 양으로 사용되는 청구 범위 13항의 중합체 입자의 용도.
  26. 페이퍼 코팅 조성물들에서 유효한 양으로 사용되는 청구범위 13항의 중합체 13항의 중합체 입자의 용도.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930006002A 1992-04-10 1993-04-10 라텍스 캡슐 및 그 제조방법 Expired - Fee Related KR100256504B1 (ko)

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